Original source · versioned page text
16-001014-02A (Ultimate SCMMP)
Attached to the e-mail Operational Works Application OPW16/0203 - 4 of 4.
Very large file: it may take a few minutes
The original of this document is very large (14.7 MB). Opening the original or downloading it may take a few minutes. Please be patient and don't click again. The page text is quick to read. If you are on mobile data, it is best to wait until you are on Wi-Fi.
PREPARED FOR PALM LAKE RESORTS
SEPTEMBER 2016
16-001014-02A
ORIGINAL
WATER & ENVIRONMENT
Cooroy Retirement Community, Trading Post Road, Cooroy
Stormwater Management Construction & Maintenance Plan (SMCMP)
See the original
The page text is free to read. Viewing or downloading an original file needs an account.
Log in to see the originalLog in to download the original file
Very large file: the download may take a few minutes. If you are on mobile data, it is best to wait until you are on Wi-Fi.
Searchable page text hides email addresses. Original files are unchanged and may show email addresses.
Full text of pages 2 to 101 (of 192)
Page 2
COMMERCIAL IN CONFIDENCE All intellectual property rights, including copyright, in designs developed and documents created by Calibre Consulting (Qld) Pty Ltd remain the property of this company. Any use made of such design or document without the prior written approval of Calibre Consulting (Qld) Pty Ltd will constitute an infringement of the rights of the company which reserves all legal rights and remedies in respect of any such infringement. The information, including any intellectual property contained in this proposal is confidential and proprietary to the Company. It may only be used by the person to whom it is provided for the stated purpose for which it is provided and must not be imparted to any third person without the prior written approval of the Company. The Company reserves all legal rights and remedies in relation to any infringement of its rights in respect of its confidential information. DOCUMENT CONTROL 16-001014-02A | Issue Details 42/09/20 FOR SUBMISSION TO COUNCIL Calibre Consulting Ground Floor, 545 Queen Street BRISBANE QLD 4000 Ph: (07) 3895 3444 © 2016 Author Checked
Page 3
TABLE OF CONTENTS
1 INTRODUCTION ............................................................................................................... 1
1.1 Scope of this report ................................................................................................. 2
2 WQCP - DESIGN, CONSTRUCTION, OPERATIONAL MANAGEMENT &
MAINTENANCE ................................................................................................................. 3
2.1 Design Phase .......................................................................................................... 3
2.1.1 General Management ................................................................................ 3
2.1.2 Mosquitoes ................................................................................................ 3
2.1.3 Cyanobacterial Blooms .............................................................................. 4
2.2 Construction Phase / Establishment ....................................................................... 5
2.2.1 General Management ................................................................................ 5
2.2.2 Mosquitoes ................................................................................................ 5
2.2.3 Cyanobacterial Blooms .............................................................................. 5
2.3 Operational Phase / Maintenance ........................................................................... 6
2.3.1 General Management & Maintenance ....................................................... 6
2.3.2 Mosquitoes ................................................................................................ 9
2.3.3 Cyanobacterial Blooms .............................................................................. 9
3 BIORETENTION DEVICES - DESIGN, CONSTRUCTION, OPERATIONAL
MANAGEMENT & MAINTENANCE ................................................................................ 11
3.1 Design Phase ........................................................................................................ 11
3.2 Construction Phase / Establishment ..................................................................... 12
3.3 Operational Phase / Maintenance ......................................................................... 13
4 CONCLUSION ................................................................................................................. 16
5 RECOMMENDATIONS ................................................................................................... 16
6 DISCLAIMER ................................................................................................................... 17
7 REFERENCES ................................................................................................................ 17
APPENDICES
APPENDIX A CONSTRUCTED WQCP - DESIGN, CONSTRUCTION AND
MAINTENANCE DETAILS
APPENDIX B BIORETENTION DEVICES - DESIGN, CONSTRUCTION AND
MAINTENANCE DETAILS
APPENDIX C PROPRIETARY GPT - DESIGN, CONSTRUCTION AND
MAINTENANCE DETAILS
APPENDIX D OPERATIONAL WORKS DRAWINGS
Page 4
1 INTRODUCTION
Calibre Consulting (QLD) Pty Ltd has been commissioned by Palm Lake Resort to prepare a Stormwater Management
Construction & Maintenance Plan (SMCMP) Report to support the Operational Works Application for Stage 2 and
subsequent stages of the Palm Lakes Retirement Community development. The site is located on 2 & 4 Lamonts Road
and 19 & 20 Trading Post Road, Cooroy within the Noosa Shire Council (NSC) Local Government Area. This Operational
Works Application follows the MCU Development Approval (MCU 15/0111 & REC15/0031) for the site.
This project has an extensive history, involving an interim reduced site layout (excludes property on 20 Trading Post
Road/Lot 4 on RP215922), numerous submissions to and correspondence with Council to achieve approval of the
stormwater management strategy. The following outlines key submissions, specific to the construction management and
operational maintenance of the stormwater treatment devices on site. Further references to past documentation are
provided in Section 1.2.
Operational Works – Bulk Earthworks Decision Notice Approval for Reduced Site Layout - Following various letter
submissions of stormwater construction management and maintenance details (refer to Section 1.2 below), Council
issued an Operational Works - Bulk Earthworks Decision Notice Approval (dated 15 October 2015) for the Palm
Lakes development. In the process of gaining approvals a framework for the SMCMP Report (incorporating design
checklists, construction and operation maintenance) was developed with Council and approved. This was
documented in Framework Letter Report (No. B14158.W.07L dated 8 October 2015), which Council have referenced
in their current Approval Conditions.
Operational Works – Internal Stormwater and Drainage Works Approval for Stage 1A of the Reduced Site Layout –
Calibre Consulting provided Stormwater Management Plan Report No. B14158.W-05B dated December 2015 and
Stormwater Management Construction & Maintenance Plan (SMCMP) Report No. B14158.W-06A dated November
2015 was issued to Council. Following various requests for information and responses from Calibre Consulting
regarding stormwater management (refer to Section 1.2 for references for this documentation), Council granted
approval for Internal Stormwater and Drainage Works in Stage 1A. The current SMCMP Report has taken into
consideration Council’s various information requests and queries and incorporated these in this report.
MCU Development Approval for Overall Site Layout – During the above processes for gaining approvals for the
reduced site layout, a MCU Development Application (MCU 15/0111 & REC15/0031) was submitted for the overall
site layout (including the property on 20 Trading Post Road/Lot 4 on RP215922). A revised stormwater management
strategy (involving three major Bioretention Devices, one small Bioretention Pod, a Central Water Quality Control
Pond with central and northern integrated detention systems) was developed based on the previous approved
strategy for the reduced site layout. This was documented in the Concept Stormwater Management Plan Report (No.
B14158.W-03A dated November 2015). A Concept SMCMP Report (No. B14158.W-09A dated January 2016) was
submitted to Council. Following various requests for information (RFI’s) and responses from Calibre Consulting,
Council granted MCU & REC approvals in Decision Notice (dated 22 July 2016) with conditions of approval.
This report has been provided to support the Operational Works Approval for Stage 2 and subsequent stages of the
overall site layout in accordance with Framework Letter Report (No. B14158.W.07L dated 8 October 2015) and by
addressing Council’s Decision Notice approval conditions. The following documents have also been provided to Council
together with this submission and should be read in conjunction with this report:
Response to Stormwater Management Approval Conditions Letter (No. 16-001014.01L.ms.cm.docx dated 26
September 2016) – provides a summary of responses to Council’s Approval Conditions regarding stormwater
management.
Stormwater Management Plan (SWMP) Report (No. 16-001014-01A dated September 2016) – provides details of
the stormwater management strategy, detailed response to Council’s Approval Conditions, with corresponding
analysis and investigations.
B14158.W-06B | SMCMP | PALM LAKE RESORTS COOROY RETIREMENT COMMUNITY, TRADING POST
ROAD, COOROY |1
Page 5
The design, management and maintenance procedures for stormwater management devices detailed in these
documents, also address previous concerns from Council and are in accordance with past approvals.
This report provides confirmation that Operational Works drawings are in accordance with design objectives, details on
construction management processes and operational maintenance monitoring procedures and corrective measures. This
is in accordance with relevant local and state guidelines, Council’s requirements and best management practices.
1.1 SCOPE OF THIS REPORT
The scope of this report is to address Council’s Approval Items by providing a Stormwater Construction Management and
Maintenance Plan for the proposed Stormwater Quality Improvement Devices (SQIDs). As per Framework Letter Report
(No. B14158.W.07L dated 8 October 2015) the performance indicators (under general management, management of
mosquitoes and cyanobacterial blooms) has been addressed during the each phase of the development, as listed below:
Design Phase (Section 2.1 & 3.1);
Construction & Establishment Phase (Section 2.2 & 3.2); and
Operational & Maintenance Phase (Section 2.3 & 3.3).
Note that the structure of this report is different from the structure of the Framework Letter Report (2015) that determined
the basic criteria and framework for management of the SQIDs. This was undertaken to provide more clarity for the
readers during the different phases of the project (i.e. design, construction or operational phase), i.e. during the
construction phase all relevant details for management of the SQIDs are provided in one section. While the structure is
different, all criteria listed in the Letter Report (2015) has been incorporated in this report.
16-001014-02A | SMCMP | PALM LAKE RESORTS COOROY RETIREMENT COMMUNITY, TRADING POST
ROAD, COOROY |2
Page 6
2 WQCP - DESIGN, CONSTRUCTION, OPERATIONAL
MANAGEMENT & MAINTENANCE
The following sections discuss the design, construction and operational management and maintenance measures for the
proposed Water Quality Control Pond (WQCP), incorporated within the Central Basin (which includes the Central
Bioretention Basin and Central Pond). These measures take into consideration general management and the
management of mosquitoes and cyanobacterial blooms during each phase of the development. This is in accordance
with the approved Framework Letter Report (No. B14158.W.07L dated 8 October 2015), as per the approval conditions
indicated in Council’s Decision Notice (dated 22 July 2016). While the structure of the report may vary slightly from the
Framework Letter Report (2015), all design features and management measures identified in the Framework Letter
Report (2015) have been implemented in this report.
Detailed design drawings for the Central Basin (Bioretention Device and WQCP) are provided in Appendix D. Refer to
the SWMP Report (No. 16-001014-02A dated September 2016) for details of the overall stormwater quality management
strategy for the site.
2.1 DESIGN PHASE
Design objectives for the Central Pond are detailed in the Framework Letter Report (No. B14158.W.07L dated 8 October
2015). Design details are indicated on Drawing Series No. 16-001014-400 provided in Appendix D.
2.1.1 GENERAL MANAGEMENT
The central WQCP has been designed in accordance with the design checklist specified below:
Healthy Waterways – WSUD Technical Design Guidelines for South East Queensland (2006) design assessment
checklists for WQCPs. Not all WQCP items in this checklist were applicable, such as those for the Inlet Zone,
however the relevant objectives have been achieved. A design checklist for the WQCP has been completed and is
provided in Appendix A.
2.1.2 MOSQUITOES
As per the Letter Report (No. B14158.W.07L dated 8 October 2015) design has accounted for the management of
mosquitoes as per Section 6.2.8 - “Designing to Avoid Mosquitoes” in WSUD Technical Design Guidelines for South East
Queensland (2006). This Heathy Waterways document outlines a number of design features that may be implemented to
reduce the risk of high mosquito populations. The following design features have been implemented in the Central
WQCP:
Table 2-1: Design Features for Mosquito Prevention
Design Feature WQCP Details
Access for mosquito predators, such as fish and Drawing No. 16-001014-400 Series in Appendix D indicates
predatory insects, provided to all parts of the water connectivity between each deep water zone within the
body by avoiding stagnant isolated areas of water. WQCP to avoid stagnant isolated areas of water.
Deep open water zones provided within the WQCP to As indicated on Drawing No. 16-001014-400 Series in
provide refuge for mosquito predators during dry Appendix D there are two deep open water zones, providing
seasons of rainfall. sufficient habitat for mosquito predators.
Bathymetry of the WQCP is provided such that The proposed WQCP has been designed with effective
regular wetting and drying is achieved in a way that bathymetry that ensures regular wetting and drying and even
promotes an even distribution of water drawdown and drawdown of water, as indicated on Drawing No. 16-001014-
minimises isolated pools. 400 Series in Appendix D. There are three outlets into the
basin which allows for an even distribution of flows
throughout the WQCP. The balance pipe between the deep
open water zones will also ensure even drawdown.
16-001014-02A | SMCMP | PALM LAKE RESORTS COOROY RETIREMENT COMMUNITY, TRADING POST
ROAD, COOROY |3
Page 7
Design Feature WQCP Details
Gross pollutant control is provided at the outlets in the As per Drawing No. 16-001014-400 Series in Appendix D,
WQCP to ensure human derived litter does not the proposed GPTs and Bioretention Devices provided
provide breeding habitats for mosquitoes. upstream of the ponds will capture gross pollutants, such as
human derived litter, prior to discharge into the pond.
Access to the WQCP is provided to allow for field Maintenance access tracks have been designed for ready
operators to monitor and treat mosquito larvae. access into the WQCP.
While these features have been implemented in the design of the WQCP, regular monitoring of mosquito activity during
construction and operational phases is necessary to allow for the changes in climatic and vegetation conditions.
2.1.3 CYANOBACTERIAL BLOOMS
The approved Letter Report (No. B14158.W.07L dated 8 October 2015), outlines the WQCP design requirements for
managing cyanobacterial blooms. These have been implemented in the design as per Table 2-2 below:
Table 2-2: Design Features for Managing Cyanobacterial Blooms
Design Feature WQCP Details
Maximum hydraulic residence time (HRT) of 15 days A HRT of twelve to fourteen days has been calculated for the
for all constructed WQCPs, ponds and basins. WQCP, based on inputs from the design. This is below the
desired maximum HRT of 15 days (refer to Section 4.4.5.2 of
the SWMP Report (No. 16-001014-01A dated September
2016).
Minimising the nutrient load reaching the open water A treatment train involving GPTs and Bioretention Devices
body by provided a treatment train that pre-treat all upstream of the proposed pond has been provided to pre-
flows from hardstand areas and most landscape treat runoff from the development.
areas prior to the downstream water body.
The median concentration of Total Nitrogen and Total A MUSIC model has been configured to determine pollutant
Phosphorous for stormwater inflows to downstream removal from the Bioretention Devices located upstream of
waterbodies is less than 1.3mg/L and 0.2mg/L the proposed Central WQCP. Daily results indicate a median
respectively. concentration of 0.6mg/L for Total Nitrogen and 0.02mg/L for
Total Phosphorus entering the WQCP, which meets the
required objectives. Results from the MUSIC modelling are
provided in Appendix A.
All open water zones are less than 3m deep. The lowest level of the deep water zones is 97.2m AHD with
a Normal Operating Level (NOL) of 99.2m AHD. Based on
this the open water zone is 2m, which is less than 3m.
Macrophytes are more than 20% of the WQCP water As per Drawing No. 16-001014-400 Series in Appendix D
surface; the Macrophyte area covers 540m2 of the WQCP water
surface, which is 27% of the NOL pond area (1,990m2).
Macrophytes are to be composed of a minimum of Refer to the Landscaping Architectural plans for
three species specifications of macrophyte vegetation species.
Landscaping and management will be designed to Refer to the Landscaping Architectural plans for planting
avoid the need for fertilisation. specifications.
16-001014-02A | SMCMP | PALM LAKE RESORTS COOROY RETIREMENT COMMUNITY, TRADING POST
ROAD, COOROY |4
Page 8
2.2 CONSTRUCTION PHASE / ESTABLISHMENT
Outlined below are the proposed procedures and methodology for the construction and operational establishment of the
Central WQCP proposed as part of Stage 2 of the development. Performance indicators for managing mosquitos and
cyanobacterial blooms have also been specified. Procedure and methodology has been based on Water By Design’s,
Construction, and Establishment Guidelines: Swales, Bioretention Devices, and Wetlands (2010) and Healthy Waterways
WSUD Technical Design Guidelines for South East Queensland (2006).
2.2.1 GENERAL MANAGEMENT
Construction of the development and the following building works on allotments has the potential to mobilise large
quantities of sediment in runoff. For WQCPs to perform as designed there is a need to protect the planting and vegetation
during this phase of the development. It is proposed to follow a staged installation procedure for the WQCP generally in
accordance with Option 2 of Table 4.4 and Section 4.7.2 of Water By Design’s Construction and Establishment
Guidelines (2011). A summary of the methodology is presented below:
1) Civil Works Functional Installation – the WQCP will be constructed in two phases. Phase 1 is to use the WQCP areas
as a temporary sediment basin during construction. In Phase 2 once the majority of the construction works have
been completed, earthworks and shaping to create the layout and functional elements of the WQCP will be
undertaken. Bulk earthworks (e.g. forming of the macrophyte zones, high‐flow bypass and surrounds, considering
future allowances for topsoil) and installation of functional elements (e.g. rock protection, inlet pipes and headwalls,
trash racks, maintenance accesses, outlet pit and pipe, and bypass weirs) shall be undertaken as per the
methodology detailed in Section 4.9.3 in the Construction and Establishment Guidelines (2011).
2) Building Phase Construction – The WQCP is to be maintained as a temporary sediment basin during the building
phase of the upstream catchment. Establishment of macrophyte zones and other vegetation areas is to be delayed
until 80% of upstream catchment development has been completed.
3) Landscape / Operational Establishment – When 80% of the proposed upstream catchment development is complete,
the ultimate WQCP configuration is to be established and vegetated in accordance with Section 4.9.3 of the
Construction and Establishment Guidelines (2011).
During the establishment of vegetation bird control is essential to prevent excess vegetation damage. Maintaining this
densely vegetated separation between the shore and deeper water is a key issue to preventing the birds concentrating in
one area and eroding the foreshore as they move from the land to the water.
During the construction phase, inspections should be carried out every month and immediately following storm events.
The construction inspection checklist, which is included in Appendix A, shall be completed and records of the inspection
shall be kept.
2.2.2 MOSQUITOES
Free draining surface areas are a critical performance indicator in managing mosquitoes during the construction phase.
Therefore standard construction measures will ensure that surfaces are free draining and no isolated shallow pool areas
are formed in the stormwater infrastructure or adjacent to the WQCP.
While mosquito fish are effective for controlling mosquito larvaue, some species (i.e. Gambusia spp.) may adversely
impact frog and native fish populations. Coppock and Erskine (1997) have found that native Fire‐tailed Gudgeons
(Hypseleotris galii) are successful predators of mosquito larvae and should be seeded into the pond before Gambusia
can establish. Their introduction into a constructed WQCP is only viable if a reasonable quality of oxygenated water can
be established. Insectivorous birds should be encouraged to keep control over adult mosquito populations.
2.2.3 CYANOBACTERIAL BLOOMS
General construction performance indicators are to be followed as per Section 2.2.1 above.
16-001014-02A | SMCMP | PALM LAKE RESORTS COOROY RETIREMENT COMMUNITY, TRADING POST
ROAD, COOROY |5
Page 9
2.3 OPERATIONAL PHASE / MAINTENANCE
Outlined below are the proposed procedures and methodology for the operational management and maintenance of the
Central WQCP proposed as part of Stage 2 of the development. Performance indicators for managing mosquitos and
cyanobacterial blooms are also specified.
2.3.1 GENERAL MANAGEMENT & MAINTENANCE
As per the Letter Report (No. B14158.W.07L dated 8 October 2015), performance indicators, monitoring schedule and
reporting is generally consistent with Water by Design - Maintaining Vegetated Stormwater Asset (2012). In particular
Section 4.4 for constructed wetlands, plus reference to Appendix B for identifying and managing weeds (this includes
both declared and environmental weeds). An extract of this appendix has been provided in Appendix A.
Inspection Frequency
During the operational phase, inspections will be carried out at least every two months and for the first three significant
storm events during the first year of establishment. Visual inspections following this period are to occur at least three
times per year. At least two inspections are to occur between October and May, with another inspection between June
and September. If a rainfall event occurs with the total rainfall on any day exceeding 50mm, inspection should be made
not less than 24 hours and not more than 72 hours after the cessation of rainfall.
Records
Inspection and monitoring will only be useful if all data obtained is recorded accurately and maintained in a reliable
database. Monitoring of changes in vegetation will be an important, long-term feature of maintenance for the WQCP.
Field data should be recorded on appropriate sheets, examples of which are provided in Appendix A. Record sheets
should be duplicated and kept in two places.
As such the maintenance checklist, which is included in Appendix A, shall be completed and records of the inspection
shall be kept. Monitoring requirements have been based on and in accordance with Water by Design’s, Maintaining
Vegetated Stormwater Assets (2012).
Photographic documentation and mapping of vegetation types are also to be recorded annually to determine changes in
vegetation over time. Methods for mapping vegetation types include using line transects that can be easily re-located at
the SQID site each year, or by measurements from permanent points or features nearby.
The records of the inspections and maintenance shall be kept and reviewed periodically to determine if the maintenance
undertaken is ensuring the SQID is functioning as intended.
Weeds
All plant species that are undesirable in the WQCP are to be considered as weeds. Maintenance staff should be familiar
with the identification of all species planted in the pond and be able to correctly identify weeds and invasive species. If
any identified species are found growing in the constructed WQCP professional advice should be sought on the
identification of the plant and removal methods. Professional advice should also be sought as soon as weed control
measures appear to be failing.
Maintenance personnel will need to identify species of both terrestrial and semi-aquatic weeds common to the area. A
selection of the most likely weeds of issue has been included in Appendix A (an extract of Appendix B Identifying and
Managing Weeds in WBD’s Maintaining Vegetated Stormwater Assets, 2012). Both declared and environmental/nuisance
weeds are incorporated into this list. When weeds have been identified they are to be removed by hand immediately or
eradication methods scheduled before the infestation becomes larger and more difficult to control.
16-001014-02A | SMCMP | PALM LAKE RESORTS COOROY RETIREMENT COMMUNITY, TRADING POST
ROAD, COOROY |6
Page 10
Plants
Plants play an important role in the efficiency of the WQCP treatment system for a number of reasons as outlined below:
Dense stands slow the velocity of stormwater moving through the system and facilitate sedimentation;
The plants themselves provide uptake of nutrients and metals;
They provide a media upon which biofilms develop and it is this site and organisms that are responsible for much of
the soluble nutrient removal capability of ponds;
Decayed plant material increases the organic content of the sediments which, in turn, promotes anaerobic
decomposition and improved nitrogen removal.
Replanting of vegetation is to be carried out to replace dead or damaged vegetation, vegetation that has been removed
by scour or erosion or vegetation that is being re-planted following tilling. Removed vegetation should be replaced by
plants of equivalent size and species, or as indicated on the appropriate Landscaping Plans.
Water Birds
Ponds are a major bird habitat especially in dry periods, and they will become a haven for water birds. These birds will,
even in normal times, impact on the constructed WQCP. This impact may lead to a decrease in the performance of the
WQCP, particularly with respect to decreased water quality. Birds such as purple water hens, ducks, and reed warblers
inhabit the WQCP permanently while others are itinerant. Some birds cause severe damage to the plants by trampling,
eating shoots and the more succulent leaves and using plant parts for nesting material. As long as this occurs on a
limited basis, little detrimental effect on the constructed WQCP and its performance will occur. However if significant
impact is evident, professional advice should be sought.
Mallards, muscovy and other domestic ducks and domestic geese should be removed. Check with governing authority for
approval to harvest the birds, and the appropriate method of doing this.
Feeding of waterbirds should be vigorously discouraged. Residents should be educated not to feed the birds nor
release domestic waterfowl into the system. Grassed verges should be kept to a minimum, vegetated foreshores
encouraged and low bushes used to discourage the birds grazing in areas adjacent to the water.
The densely vegetated marsh zone, proposed for this WQCP, is not a favoured habitat for waterfowl. Maintaining this
densely vegetated separation between the shore and deeper water is a key issue to preventing the birds concentrating in
one area and eroding the foreshore as they move from the land to the water.
Algae (Filamentous and Blue Green)
Algae will occur naturally in the WQCP as a result of nutrient concentrations in stormwater inflows and the nutrients
released from sediment and decomposing organic matter.
Filamentous algae usually grow in shallow vegetated zones and open zones, forming dense floating mats that limit light
penetration into the water column. Excessive filamentous algal biomass may cause blockage to hydraulic structures,
damage to vegetation health (smother or facilitate displacement of vegetation), and lead to oxygen depletion of the pond
when the algae dies or decays. Unless amenity is an issue it is not generally necessary to take action when sighting
small areas of filamentous algae biomass. If the algal mat covers more than 10% of the constructed WQCP area on
inspection action is to be taken. Filamentous algal biomass may be physical removed using rakes or with specialist
machinery.
Planktonic algae, including cyanobacterial blooms (often known as blue-green algae), usually grow in open water areas.
They produce toxins, which pose a potential public health risk. Further investigation is required if Planktonic algae is
sighted during inspection. Refer to Section 2.3.3 for further details of management of cyanobacterial blooms.
Accumulation of Toxicants
Research suggests that metals and phosphorus and organic substances are tightly bound in or to the sediments and
media placed in a pond and do not become mobilised back into the water column over long periods of time (depending
on sediment type).
The removal of sediment accumulated in the vegetated areas of the WQCP is not proposed, as the potential to remobilise
toxicants into the water column is high and will result in significant environmental harm.
16-001014-02A | SMCMP | PALM LAKE RESORTS COOROY RETIREMENT COMMUNITY, TRADING POST
ROAD, COOROY |7
Page 11
Water Quality Testing
Regular water quality testing of the WQCP (other than testing for mosquitoes and cyanobacterial blooms, as specified
below) is not proposed. Visual performance indicators are to be assessed as presented in Constructed WQCP Inspection
Checklist in Appendix A.
Any water quality testing undertaken would be part of a catchment wide testing program, by others, or unless a specific
site issue has identified the need by an inspector.
If Water quality testing is requested it may involve a chemical analysis of the WQCP or a macro‐invertebrate analysis of
the WQCP or downstream waterways. The chemical analysis of the WQCP should be undertaken in accordance with the
relevant Australian standard and samples should be taken at the inflow and outflow points of the constructed WQCP.
For the macro‐invertebrate analysis various documents are available which outline the methodology required to
undertake the assessment. The following publications provide some guidelines to macro‐invertebrate analysis:
SIGNAL 2. – A Scoring System for Macro‐invertebrate (‘Water Bugs’) in Australian Rivers, Monitoring River Health
Initiative Technical Report No. 31 (Chessman 2003).
Australia Wide Assessment of River Health Australian Capital Territory Bio Assessment Report (ACT Interim Final
Report), Monitoring River Health Initiative Technical Report No. 3 (Keen 2001).
Australian River Assessment System: National Guidelines for Mapping AusRivAS Aquatic Macroinvertebrate Score.
Monitoring River Health Initiative Report No. 38 (Gray 2004).
Yearly Review of Maintenance Management Plan
Each year a review is to be carried out to determine if the programmed inspection and maintenance (including checklists)
is ensuring all SQIDs are functioning as intended. The review should include an assessment of the maintenance
database to determine whether the programmed inspections and maintenance is effective. Information on the database
should be assessed to determine whether any noticeable changes are evident in vegetation, presence of fauna and
operational efficiency of any structures or features of the device. This will further provide indicators as to whether
sufficient information is being recorded for management purposes.
Annual review of performance indicators (e.g. macrophyte coverage and dieback rate and upper concentration limits for
Microcystis aeruginosa or biovolume equivalent) are to be assessed against latest peer reviewed journal publications and
health regulations to ensure performance targets are still appropriate. Updates to performance indicators are to be made
if required.
Maintenance Personnel Safety (OH&S)
The QLD Work Health and Safety Act 2011 requires that all reasonably practicable steps be taken to protect an
employee’s health in a workplace. Organisations involved in the inspection and maintenance of the SQIDs should
therefore ensure the follow.
Have a documented occupational health and safety policy in place;
Ensure all staff and maintenance personnel are aware of and abide by the policy; and
The policy provides a mechanism for review and improvement.
As part of the policy personnel involved in the maintenance of the SQIDs are to have sufficient resources (such as
personnel protective equipment, training etc.) to carry out the task in a safe manner.
General Public Safety
The safety of the general public in the area of SQID maintenance operations shall be ensured. Depending on the nature
of the operations, the following may be appropriate;
Notices to inform the public of SQID maintenance may be circulated prior to the scheduled date.
Temporary signage and safety barriers may be erected around maintenance work areas prior to the works
commencing and are not to be removed until all works have finished.
Signage is to be erected around the WQCP system should toxic algal blooms be recorded at levels that trigger the
“Red Level Action Mode” as specified in Table 7.2.1 of the Queensland Water Quality Guidelines 2009. An extract is
provided in Appendix A. Appropriate corrective measures are to be undertaken during this event.
Where maintenance works are to be conducted on roads, traffic control should be included.
16-001014-02A | SMCMP | PALM LAKE RESORTS COOROY RETIREMENT COMMUNITY, TRADING POST
ROAD, COOROY |8
Page 12
2.3.2 MOSQUITOES
In a well‐designed and managed WQCP mosquitoes are rarely a problem and in most cases community education is part
of the solution. Residents should be encouraged to eliminate mosquito breeding sites by eliminating stagnant pools of water
formed by containers, pot plants, etc.
The creation of diverse habitats, that support predatory insects, minimisation of areas for mosquito larvae to hide,
maintenance of flow through the constructed WQCP, avoidance of small puddles, algae build up on structures and
control over water levels are the main mosquito management strategies.
Checks should also be undertaken for the presence of mosquito fish. While mosquito fish are effective for controlling
mosquito larvaue, some species (i.e. Gambusia spp.) may adversely impact frog and native fish populations. Coppock
and Erskine (1997) have found that native Fire‐tailed Gudgeons (Hypseleotris galii) are successful predators of mosquito
larvae and should be seeded into the pond before Gambusia can establish. Their introduction into a constructed WQCP
is only viable if a reasonable quality of oxygenated water can be established.
Insectivorous birds should be encouraged to keep control over adult mosquito populations.
Maintenance staff should check for the presence of mosquito larvae in shallow pooled water at the edge of the
constructed WQCP. A key performance indicator during the Operational Phase is 1 larvae per 2 ladles dips
(300mL ladle).
Corrective actions shall be consistent with the most current versions of the “Water by Design – Rectifying Stormwater
Assets”. Removal of litter (that can create habitats for mosquitoes) and isolated pools of water through filling and/or
profiling are immediate corrective actions that should be undertaken if a mosquito habitat is identified. If the problem
persists, Page 53 of the “Water by Design – Rectifying Stormwater Assets” indicates further corrective actions. An extract
is provided in Appendix A. Some of these involve consultation with a mosquito specialist, checking that WQCP ponding
depths is in accordance with design details and introducing predators of mosquitoes.
2.3.3 CYANOBACTERIAL BLOOMS
Performance indicators for managing cyanobacterial blooms during Operational Phase includes:
No fertiliser to be used on the banks of the pond or WQCP;
Schedule and measure any fertiliser applications to maximise nutrient uptake by plants and avoid runoff throughout
upstream catchment;
Water is clear, that is turbidity is such that the floor of the pond can be seen at 0.75m depth;
No visible algal blooms;
No floating declared or environmental weeds present; and
Macrophyte coverage to be above 15% of the WQCP water surface. Inspections shall also assess unhealthy
plants or dieback.
If inspections reveal non-performance of indicators (as indicated above in bolded italics), water quality testing is
required to assess the potential of Cyanobacteria Blooms and need for corrective actions. Macrophyte coverage and
dieback rates that trigger the requirement for water quality testing are to be regularly reviewed and updated as per the
latest peer reviewed journal specifications. Yearly assessment of performance indicators is to be undertaken. This is in
accordance with Item 2(a) of Council’s Operational Works - Bulk Earthworks Decision Notice (dated 15 October 2015).
Performance indicator for water quality testing is ≤500cells/mL Microcystis aeruginosa or biovolume equivalent ≤0.04
mm3/mL combined total of all cyanobacteria. Further details on the response to trigger levels for cyanobacteria blooms
can be found in Appendix A and includes notification and signage for higher algal counts, as based on the Queensland
Water Quality Guidelines 2009 and the NH&MRC Guidelines for Managing Risk in Recreational Water (2008). Trigger
levels are to be regularly reviewed and updated in accordance with the latest relevant health regulations. Yearly
assessment of required performance targets is to be undertaken. This is in accordance with Item 2(b) of Council’s
Operational Works - Bulk Earthworks Decision Notice (dated 15 October 2015).
Corrective actions shall be consistent with the most current versions of the “Water by Design – Rectifying Stormwater
Assets”. Page 58 of the “Water by Design – Rectifying Stormwater Assets” indicates corrective actions that may be
16-001014-02A | SMCMP | PALM LAKE RESORTS COOROY RETIREMENT COMMUNITY, TRADING POST
ROAD, COOROY |9
Page 13
undertaken to remove cyanobacteria. An extract is provided in Appendix A. The potential rectification methods are
summarised below:
If cyanobacterial blooms are a result of plant failure or lack of vegetation, replanting of the WQCP should be
immediately undertaken. The presence of dense vegetation will help remove algal growth due to shading and is less
likely to be smothered.
If cyanobacterial blooms are a result of high nutrient concentrations, immediate actions would involve removal of
sediments, using a 1 or 2 week “dry out period” for the WQCP to destroy existing algae. Another solution would be to
pump out the WQCP over the Bioretention Basin or embankment over a period to treat and remove algae. Long term
actions involve catchment management solutions (i.e. identifying the source of nutrients flowing in to the WQCP and
applying corrective measures).
Immediate management responses involve providing signage around the WQCP warning of the potential health risks,
restricting access, and use chemical actions to eliminate toxins (specialist advice should be sought prior to
undertaking chemical actions)
Refer to “Water by Design – Rectifying Stormwater Assets” for further details of appropriate corrective actions.
16-001014-02A | SMCMP | PALM LAKE RESORTS COOROY RETIREMENT COMMUNITY, TRADING POST
ROAD, COOROY | 10
Page 14
3 BIORETENTION DEVICES - DESIGN, CONSTRUCTION,
OPERATIONAL MANAGEMENT & MAINTENANCE
The following sections discuss the design, construction and operational management and maintenance measures for the
proposed Bioretention Devices and upstream proprietary Gross Pollutant Trap devices. This is in accordance with the
approved Framework Letter Report (No. B14158.W.07L dated 8 October 2015), as per the approval conditions indicated
in Council’s Decision Notice (dated 22 July 2016). While the structure of the report may vary slightly from the Framework
Letter Report (2015), all design features and management measures identified in the Framework Letter Report (2015)
has been implemented in this report.
The following stormwater treatment devices have been reviewed in this section:
Northern Bioretention Device – Refer to Drawing No. 16-001014-415.
Central Bioretention Device – Refer to Drawing No. 16-001014-405.
Southern Bioretention Device – Refer to Drawing No. 16-001014-400.
Bioretention Pod D – Refer to Drawing No. B14158.W-SK113.
Detailed design drawings for the above Bioretention Devices are provided in Appendix D. Bioretention Devices are
proposed as secondary treatment devices within the proposed treatment train. Refer to details provided in the SWMP
Report (No. 16-001014-02A dated September 2016) for the stormwater quality management strategy for the site.
Proprietary Gross Pollutant Trap devices (GPT’s) are proposed upstream of each Bioretention Device as a first measure
of treatment or primary treatment. The design, construction and operational management and maintenance measures for
the proposed Proprietary GPT’s are also discussed in this section.
Since each Bioretention Device has been designed as an unsaturated device to drain within a 24 hour period, an
outbreak of mosquito, let alone cyanobacterial blooms are highly unlikely in these systems (cyanobacterial blooms form
in deep water zones). Occurrence of mosquitoes in the Bioretention Device may be possible in the very unlikely event
that the Biorention filter system remains clogged for an extended period (causing extended period of stagnant water) or if
the batters are severely scoured such that isolated depressions and mounds are formed that prevent draining of the
basin for an extended period. The design, construction and operational monitoring and maintenance procedures detailed
in this section, provides effective design measures and counter-actions to avoid the very unlikely event of an extended
period stagnant water occurring in the Bioretention Device. While not specifically mentioned, the standard Bioretention
measures detailed below are considered to be appropriate for avoiding risk of mosquitos in the Bioretention Devices
proposed.
3.1 DESIGN PHASE
Design objectives for the Bioretention Devices are detailed in the Framework Letter Report (No. B14158.W.07L dated 8
October 2015). Design details are indicated on Drawing No. 16-001014-400 Series provided in Appendix D.
A Design Check and Summary from Table 2.2 of Water By Design’s Bioretention Technical Design Guidelines
(October 2012) has been undertaken for each Bioretention Device proposed. Refer to Appendix C. Relevant
calculations and supporting material has also been provided in this appendix.
Proprietary GPT will be designed in accordance with manufacturers specifications (refer to HumeGard GPT
Technical Manual in Appendix C or approved equivalent for design details).
As per Condition 65.2, Council specify that runoff from all road and car parking areas is to be pre-treated for grease and
oil prior to discharging to the downstream Bioretention Devices. According to WBD Bioretention Technical Design
Guidelines (2014), Bioretention Devices are suitable for treating runoff from roof, ground and road areas. Table 14 of the
guidelines outlines pre-treatment measures typically proposed upstream of Bioretention Devices based on catchment
size (i.e. for catchments between 2ha and 5ha vegetated swales, coarse sediment forebays, inlet pond or GPT’s are
recommended). The condition to pre-treat all runoff from road and car parking area specifically for oil and grease prior to
discharge into Bioretention Devices is considered to be conservative given the nature of the Bioretention treatment
device. There are also many examples of urban, commercial and industrial developments that propose Bioretention
Devices without pre-treatment of oil and grease.
16-001014-02A | SMCMP | PALM LAKE RESORTS COOROY RETIREMENT COMMUNITY, TRADING POST
ROAD, COOROY | 11
Page 15
It is also noted that the Bioretention Device will not be a Council asset. Hence, it will be the responsibility of the developer
to manage and replant the basin in the very unlikely event that extreme oil spillages damage the Bioretention Devices
vegetation.
Apart from the Northern Bioretention Basin, GPT’s are proposed upstream of all Bioretention Devices and subsequently
the proposed pond. As discussed below and GPT’s have the capability of trapping floating oil and grease pollutants and
are considered to be an appropriate pre-treatment to Bioretention Devices, albeit conservative where the catchment is
small. Since Catchment A is only 2.45ha with no significant areas of car parking a sediment forebay is to be provided.
Note that the Northern Bioretention Basin does not discharge into the proposed pond.
The HumeGard GPT proposed upstream of the proposed Bioretention Devices has the capability of trapping floating oil
and grease pollutants. As demonstrated on Page 2 of the HumeGard GPT Technical Manual provided in Appendix C,
the application of a floating boom provides separation at the surface of the waters between the sediment storage
chamber and the outlet chamber. This effectively captures pollutants such as oils and greases that float to the surface.
Based on laboratory and field testing, Table 1 on Page 3 of the Technical Manual indicates 90% removal efficiency of
Hydrocarbons during emergency spill events.
3.2 CONSTRUCTION PHASE / ESTABLISHMENT
Outlined below are the proposed procedures and methodology for the construction and operational establishment of the
proposed Bioretention Devices throughout the site. Procedure and methodology has been based on Water By Design’s,
Construction, and Establishment Guidelines: Swales, Bioretention Devices, and Wetlands (2010) and Healthy Waterways
WSUD Technical Design Guidelines for South East Queensland (2006).
Construction of the Retirement Community and the building works has the potential to mobilise large quantities of
sediment in runoff. For the Bioretention Devices to perform as designed there is a need to protect filter media and basin
vegetation during this phase of the development. Therefore a staged construction and establishment method for
construction of the Bioretention Devices will be followed.
It is proposed to follow an installation procedure for each Bioretention Devices generally in accordance with Option 1 of
the Staged Construction and Establishment Methodology as outlined in Table 3.6 and Section 3.8.1 of the Water by
Design Construction and Establishment Guidelines (2011). A summary of this methodology is presented below.
1) Civil Works Functional Installation – Initially the basin locations will be used as a Sediment Basins or Traps. Once the
majority of the civil construction works are complete, earthworks and shaping to create the layout and functional
elements of the Bioretention Devices will be undertaken. This includes installation of functional elements (e.g. inlets,
outlets structures, subsoil drainage, transition layers and filter media) shall be undertaken as per the methodology
detailed in Section 3.9.1 in the Water by Design Construction and Establishment Guidelines (2011). The functional
elements will be protected from construction sediment loads by:
Sediment fences around the perimeter of the systems.
Laying a temporary filter cloth (or 25mm thick layer of course sand and 25mm of topsoil) over the Bioretention
filter. This will be kept in place during the finalisation of Civil Works and the Building Phase.
Subject to timeframe of building works topsoil can be seeded.
2) Building Phase Construction – During this phase the Bioretention Devices shall continue to operate as Temporary
Sediment Basins or Traps. Sediment fences shall remain around the perimeter of the systems (both around the filter
media and the top of batter) to restrict sediment inflow. Clear indications of the restriction of traffic to the Bioretention
Device shall also be displayed.
3) Landscape / Operational Establishment – When the Building Phase is 80% complete in the upstream catchment, the
temporary protective measures and accumulated sediments within the systems will be removed. The basin shall be
planted with vegetation and landscaped in accordance with the approved landscape plans. Sufficient watering and
removal of weeds following planting shall be undertaken in accordance with Section 3.9.3 of the Water by Design
Construction and Establishment Guidelines (2011).
16-001014-02A | SMCMP | PALM LAKE RESORTS COOROY RETIREMENT COMMUNITY, TRADING POST
ROAD, COOROY | 12
Page 16
During the construction phase, inspections should be carried out every month and immediately following storm events.
The construction inspection checklist, which is included in Appendix B2, shall be completed and records of the
inspection shall be kept.
As specified in Section 2.2.3, free draining surface areas are a critical performance indicator in managing mosquitoes
during the construction phase. Therefore standard construction measures will ensure that surfaces are free draining and
no isolated shallow pool areas are formed in the stormwater infrastructure or adjacent to the Bioretention Device.
Proprietary GPTs are to be installed in accordance with manufactures specifications. Refer to HumeGard Installation
Guide or an approved equivalent GPT specifications for installation details.
3.3 OPERATIONAL PHASE / MAINTENANCE
Outlined below are the proposed procedures and methodology for the operational management and maintenance of the
Bioretention Devices. During Operational Phase, regular inspections of the Bioretention Device is required to ensure
vegetation establishes and the properties of the filter media remain effective.
An operational management and maintenance checklist for the Bioretention Devices is provided in Appendix B, which is
further discussed in the following subsections. Operational management and maintenance of the proposed GPTs will be
undertaken to manufacturer’s specifications. Refer to HumeGard Maintenance Guide or an approved equivalent GPT
maintenance guideline for the appropriate management and maintenance methodology.
Inspection Requirements
A checklist has been developed for the Bioretention Devices. The condition and maintenance carried out will be recorded
on the checklist at the time the inspection and/or maintenance is undertaken. A copy of the checklist is presented in
Appendix B.
Maintenance personnel should also be encouraged to report and document changes in vegetation type within the
Bioretention Device. Photographic documentation and mapping of vegetation types are to be recorded annually to
determine changes in vegetation over time. Photographs of each device are to be taken at the same location annually.
Through these procedures a reliable maintenance database can be developed and used to determine if the maintenance
undertaken is ensuring the SQID is functioning as intended.
Except for periods of extended wet weather, mosquitoes are unlikely to be an issue as surface water within the
Bioretention Device is not expected to remain for more than two days.
Weed Removal
Maintenance personnel will need to identify species of both terrestrial and semi-aquatic weeds common to the area. As
the Bioretention Device is a “dry” SQIDs, aquatic weed infestation is unlikely. When weeds have been identified they are
to be removed by hand immediately or eradication methods scheduled before the infestation becomes larger and more
difficult to control. It should be noted that herbicides should not be used in the removal of invasive weeds as this has
negative impacts on downstream water quality.
Replanting
Replanting of vegetation is to be carried out to replace dead or damaged vegetation, vegetation that has been removed
by scour or erosion, or vegetation that is being re-planted following tilling or the replacement of filter media. Removed
vegetation should be replaced by plants of similar size and species, or as indicated on the appropriate Landscaping
Plans.
16-001014-02A | SMCMP | PALM LAKE RESORTS COOROY RETIREMENT COMMUNITY, TRADING POST
ROAD, COOROY | 13
Page 17
Filter Inspection and Replacement
Fine sediment and silt may accumulate within the filter media of the Bioretention Device over time. Removal of sediment
and silt trapped within the filter media is expected to be the most costly maintenance requirement for Bioretention Device.
It is recommended that a visual inspection of the infiltration properties be undertaken at least three times per year with
more frequent inspections no greater than three months apart between October and May. This is to determine whether
built-up fine sediment and silt has reached a point where the filter media has become clogged.
The infiltration properties of the filter media within the Bioretention Device needs to be checked after a period of
significant rainfall event, which is defined as a 24 hour period with rainfall greater than 200mm, or a shorter period with an
average rainfall intensity greater than 50mm/hr. This is an ideal period to assess the infiltration properties as water should
not pond for an extended period. Therefore inspections should occur 24 to 72 hours after an appropriate rainfall event.
In the event that isolated boggy patches occur within the Bioretention Device then the subsoil drainage pipes could be
blocked. If this is not the case and no other blockages have been observed then surface of the media is to be tilled (raked
and aerated) to a depth of 150mm. This will require temporarily removing and storing the surface vegetation prior to tilling
the surface. Should the infiltration properties be improved then the removed vegetation and coarse aggregate layer can
be replanted. Should tilling prove unsuccessful or if an infiltration check indicates filter media to be clogged, then the top
portion of the filter media is to be replaced as follows:
1) Removal of surface vegetation and coarse aggregate layer and store for re-establishment;
2) Remove the top 150mm of filter media and dispose of in an approved manner;
3) Till the remaining filter media to a further depth of 300mm;
4) Place a new layer of appropriate filter media as per the specification (refer to Appendix B), free from organic matter,
clay and silt; and
5) Replant the removed vegetation.
If blockages occur frequently, a filter media with a higher saturated hydraulic conductivity should be considered.
Reassessing the species and planting density of vegetation is also an option.
Unless changes to the filter media specification are made through a review of the SQID performance, the filter media to
be used for the Bioretention Device is to be a Sandy Loam as per the FAWB Guidelines for Filter Media in Biofiltration
Systems (Version 3.01, 2009).
Subsoil Drainage Inspection & Cleanout
The build-up of fine sediment and silt within the subsoil drainage pipes is unlikely as it will be trapped by the filter media.
However the subsoil drainage is to be checked annually for blockages that may be caused by foreign matter entering
through cleanout inspection openings or by small fauna. This can be done by either:
Observing the condition of the subsoil drain through the cleanout and inspection openings located towards the
downstream end of a subsoil drainage pipe.
Observing the amount of sediment and silt flushed into the downstream field inlet when water is pumped into the
upstream end of the subsoil drainage line (through a cleanout and inspection opening).
If a considerable amount of sediment and silt is observed or carried into the downstream inlet, then each subsoil drainage
line must be flushed out with high pressure water.
Water is to be pumped into each subsoil drainage pipe through the upstream cleanout inspection opening until all
sediment has been ejected from the pipe. To collect the water and ejected sediment within the downstream pit a
temporary barrier is to be placed over the downstream pipe opening (such as sand bags) and a pump used to draw the
water, sediment and silt out of the pit and irrigated onto areas of open space away from the basin. This will ensure the
sediment and silt does not enter the downstream waterway.
If frequent issues occur with the subsoil drainage system, CCTV checking could be undertaken to identify any damage
subsoil drainage.
16-001014-02A | SMCMP | PALM LAKE RESORTS COOROY RETIREMENT COMMUNITY, TRADING POST
ROAD, COOROY | 14
Page 18
Monitoring
Visual monitoring of Bioretention Devices is proposed as part of the inspection and maintenance requirements for the
devices. Visual inspections will occur at least three times per year with more frequent inspections to occur no more than
three months apart between October and May. Inspection should be made not less than 24 hours and not more than 72
hours after the cessation of rainfall if the total rainfall on any day exceeds 30mm.
Monitoring
Each year a review is to be carried out to determine if the programmed inspection and maintenance (including checklists)
is ensuring SQIDs are functioning as intended. The review should include an assessment of the maintenance database
to determine whether the programmed inspections and maintenance is effective. Information on the database should be
assessed to determine whether any noticeable changes are evident in vegetation, presence of fauna and operational
efficiency of any structures or features of the device. This will further provide indicators as to whether sufficient
information is being recorded for management purposes.
Maintenance Personnel Safety (OH&SS)
The Workplace Safety Regulation 2011 requires that all reasonably practicable steps be taken to protect an employee’s
health in a workplace. Organisations involved in the inspection and maintenance of the SQIDs should therefore:
Have a documented occupational health and safety policy in place;
Ensure all staff and maintenance personnel are aware of and abide by the policy; and
The policy provides a mechanism for review and improvement.
As part of the policy personnel involved in the maintenance of the SQIDs are to have sufficient resources (such as
personnel protective equipment, training etc.) to carry out the task in a safe manner.
General Public Safety
The safety of the general public in the area of the SQID being maintained also needs to be ensured. Notices to inform
the staff and public accessing the site regarding the SQID maintenance needs to be circulated prior to the scheduled
date. Temporary signage and safety barriers need to be erected around maintenance work areas prior to the works
commencing and are not to be removed until all works have finished.
Further Corrective Actions
Further corrective actions are details in “Water by Design – Rectifying Stormwater Assets”. Refer to an extract provided in
Appendix B.
16-001014-02A | SMCMP | PALM LAKE RESORTS COOROY RETIREMENT COMMUNITY, TRADING POST
ROAD, COOROY | 15
Page 19
4 CONCLUSION
A Stormwater Management Construction and Maintenance Plan (SMCMP) has been prepared to support the Operational
Works Approval for Palm Lakes Retirement Community located on 2 & 4 Lamonts Road and 19 & 20 Trading Post Road,
Cooroy.
As per Framework Letter Report (No. B14158.W.07L dated 8 October 2015) the performance indicators (under general
management, management of mosquitoes and cyanobacterial blooms) have been addressed during the each phase of
the development (Design, Construction and Operational Phase). This has been determined in accordance with relevant
local and state guidelines, previous approved documentation submitted by Calibre Consulting, and Council’s specific
requirements. This report addresses conditions of approval items related to stormwater management during construction
and operational phases of the development as outlined in Decision Notice (dated 22 July 2016).
5 RECOMMENDATIONS
It is recommended that this Operational Works design for Stage 2 (including Central Basin and Southern Basin) be
approved on the basis that acceptable outcomes have been provided during design, construction and operational phases
for the proposed stormwater quality treatment devices
With this submission we seek overall strategy approval for the balance stormwater management works which include the
Northern Basin and Bio-Pod D2 and D3.
16-001014-02A | SMCMP | PALM LAKE RESORTS COOROY RETIREMENT COMMUNITY, TRADING POST
ROAD, COOROY | 16
Page 20
6 DISCLAIMER
This report has been prepared on behalf of and for the exclusive use of Palm Lake Resorts and is subject to and issued
in accordance with the agreement between Calibre Consulting (QLD) Pty Ltd.
Our investigation and analysis has been specifically catered for the particular requirements of Palm Lake Resorts and
may not be applicable beyond this scope. For this reason, any other third parties are not authorised to utilise this report
without further input and advice from Calibre Consulting (QLD) Pty Ltd.
Calibre Consulting (QLD) Pty Ltd accepts no liability or responsibility whatsoever for the report in respect of any use of or
reliance upon this report by any third party.
The investigation and analysis has relied on information provided by others. We accept no responsibility for accuracy of
material supplied by others. The accuracy of the investigation, analysis and report is dependent upon the accuracy of this
information.
7 REFERENCES
Engineers Australia (2006), Australian Runoff Quality. A guide to Water Sensitive Urban Design.
Healthy Waterways (2006), Water Sensitive Urban Design – Technical Design Guidelines for South East
Queensland.
Humes (2015) HumeGard Technical Manual http://www.humes.com.au/en/precast-concrete-solutions/stormwater-
solutions/stormwater-treatment/primary.html
Humes (2015) HumeGard Installation Guide http://www.humes.com.au/en/precast-concrete-solutions/stormwater-
solutions/stormwater-treatment/primary.html
Humes (2015) HumeGard Maintenance Guide http://www.humes.com.au/en/precast-concrete-solutions/stormwater-
solutions/stormwater-treatment/primary.html
National Health and Medical Research Council – Australian Government (2008), Guidelines for Managing Risk in
Recreational Water.
Noosa Council (2006), The Noosa Plan. Planning Scheme Policy.
Queensland Government (2013), Queensland Water Quality Guidelines 2009. Environmental Protection Agency
(QLD).
Water by Design (2011), Construction & Establishment Guidelines.
Water by Design (2012), Maintaining Vegetated Stormwater Assets.
Water by Design (2012), Rectifying Stormwater Assets.
Water by Design (2012), Urban Lakes Discussion Paper - Managing the Risk of Algal Blooms.
16-001014-02A | SMCMP | PALM LAKE RESORTS COOROY RETIREMENT COMMUNITY, TRADING POST
ROAD, COOROY | 17
Page 21
CALIBRE CONSULTING APPENDICES [OCR of page images] APPENDICES
Page 22
CALIBRE CONSULTING
APPENDIX A CONSTRUCTED WQCP - DESIGN, CONSTRUCTION AND
MAINTENANCE DETAILS
Appendix A1 – WCQP Design Phase Details
Appendix A2 – WCQP Construction Phase Details
Appendix A3 – WCQP Operational Phase Details
Appendix A4 – Contingency Plan
Appendix A5 – Cyanobacteria Levels
Appendix A6 – Weed Information
Page 23
Appendix A1 – WCQP Design Phase Water Quality Control Pond Design Calculations Summary (Derived From Water By Design Guidelines) Water Quality Control Pond Design Assessment Checklist (Derived From Water By Design Guidelines) Energy Dissipater Calculations Critical Velocity Calculations MUSIC Modelling Details – Inflow Concentrations Into WQCP
Page 24
WQCP DESIGN CALCULATIONS SUMMARY- BASED ON WBD WSUD TECHNICAL DESIGN GUIDELINES
Calculation Summary
Calculation Task Outcome Comments Check
Catchment Characteristics
Catchment area 13.9 ha Including Existing External Catchments
Catchment land use (i.e residential, commercial etc.) varying Refer to latest issue of the SWMP Report No. 16-001014-01.
Combined WQCP & detention basin is proposed. Energy Dissipaters and
Storm event entering inlet pond (minor or major) Major
velocity checks undertaken to ensure protection of WQCP.
Conceptual Design
Macrophyte zone area 1,940 m2 Area Required determined through MUSIC modelling
Permanent pool level of macrophye zone 99.2 m AHD
Extended detention depth (0.25-0.5m) 0.4 m
Notional detention time 55 hrs
1 Confirm Treatment Performance of Conceptual Design
Total suspended solids (Figure 6-2) 80% % removal Refer to latest issue of the SWMP Report No. 16-001014-01.
Total phosphorus (Figure 6-3) 69% % removal Refer to latest issue of the SWMP Report No. 16-001014-01.
Total nitrogen (Figure 6-4) 46% % removal Refer to latest issue of the SWMP Report No. 16-001014-01.
2 Determine Design Flows
Modelling Software Used XP-RAFTS Type Refer to latest issue of the SWMP Report No. 16-001014-01.
Verified with Rational Method Check? Yes Y/N Refer to latest issue of the SWMP Report No. 16-001014-01.
'Design operation flow' (1 year ARI) 2.575 m3/s
'Above design flow' (2-100 year ARI) 5.067 m3/s
3 Design Inlet Zone
Refer to Sedimentation Basin (Chapter 4) for detailed check sheet if applicable
Is a GPT required? YES Y/N Catchment larger than 5ha
Humegard HG45A or appropriate equivalent, maintenance access allowed
Suitable GPT selected and maintenance considered YES Y/N
for.
Is an Inlet Zone Required? NO Y/N
Inlet Zone Size
Not Inlet Zone proposed, however an upstream GPT and Bioretention
Target Sediment Size for Inlet Zone N/A um
Basins are proposed.
Capture efficiency N/A %
Inlet zone area (Figure 4.2 in Chapter 4) N/A m2
Vs > Vs:5yr N/A
Inlet Zone Connection to Macrophyte zone
Overflow pit crest level N/A m AHD
Overflow pit dimension N/A LxW
Provision of debris trap N/A
Connection pipe dimension N/A mm diam
Connection pipe invert level N/A m AHD
High Flow Bypass Weir
Weir Length N/A m
High flow bypass crest level (top of extended detention) N/A m AHD
Not Applicable - A WQCP is proposed not a wetland (the WQCP is not
4 Designing the Macrophyte Zone
required to achieve WQO's)
As specified in the approved Framework Letter Report (No.B14158.W.07L
dated 8 October 2015), this meets requirement for WQCP macrophyte area
Area of Macrophyte Zone 540 m2
(being above 20% of the WQCP water surface). Note that the WQCP is not
required to achieve WQO's.
Aspect Ratio N/A L:W
Not Applicable - A WQCP is proposed not a wetland (the WQCP is not
Hydraulic Efficiency N/A
required to achieve WQO's)
5 Design Macrophyte Zone Outlet
Riser Outlet
Target maximum discharge (Qmax) 0.004 m3/s
Uniform Detention Time Relationship for Riser 49 hrs
Maintenance Drain
Maintenance drainage rate (drain over 12hrs) N/A m3/s Pump out will be required for maintenance
Diameter of maintenance drain pipe N/A mm Pump out will be required for maintenance
Diameter of maintenance drain valve N/A mm Pump out will be required for maintenance
Discharge Pipe
Diameter of discharge pipe 825 mm
6 Design High Flow Bypass 'Channel'
Energy Dissipaters designed to reduce velocities, Velocity Checks
Longitudinal slope N/A %
undertaken through wetland,
Base width N/A m
Batter slopes N/A H:V
7 Verification Checks
Macrophyte zone re-suspension protection 0.001 m/s
WQCP was not modelled in MUSIC and is not required to meet site
Confirm Treatment Performance N/A Y/N
WQO's.
8 RPEQ Verification Matthew Starr MS (RPEQ 9485)
Page 25
WQCP DESIGN ASSESSMENT CHECKLIST - BASED ON WBD WSUD TECHNICAL DESIGN GUIDELINES
WETLAND DESIGN ASSESSMENT CHECKLIST
Asset I.D. Central Basin (WQCP)
Wetland Refer to Operational Works Drawing No. 16-001014-400 Series and latest issue of SWMP Report No. 16-001014-01.
L ti
Hydraulics: Design operational flow (m3/s): 5.07 Above design flow (m3/s): 5.07
Area: Catchment Area (ha): 13.9 Wetland Area (ha): 0.194
TREATMENT Y N Comment
MUSIC modelling performed? Y Refer to latest issue of SWMP Report No. 16-001014-01.
INLET ZONE Y N Comment
Discharge pipe/structure to inlet zone sufficient for maximum design flow? N/A Inlet zone/pond is not applicable as runoff is pretreated by GPT and Bioretention
Basins with energy dissipaters at outlets into basin
Scour protection provided at inlet for inflow velocities? N/A Scour Protection provided for inflows into pond.
Configuration of inlet zone (aspect, depth and flows) allows settling of particles N/A No Inlet Zone provided, refer to comments above
>125μm?
Bypass weir incorporated into inlet zone? N/A No Inlet Zone provided, refer to comments above
Bypass weir length sufficient to convey 'above design flow' ? N/A No Inlet Zone provided, refer to comments above
Bypass weir crest at macrophyte zone top of extended detention depth? N/A No Inlet Zone provided, refer to comments above
Bypass channel has sufficient capacity to convey 'above design flow'? N/A No Inlet Zone provided, refer to comments above
Bypass channel has sufficient scour protection for design velocities? N/A No Inlet Zone provided, refer to comments above
Inlet zone connection to macrophyte zone overflow pit and connection pipe sized to N/A No Inlet Zone provided, refer to comments above
convey the design operation flow?
Inlet zone connection to macrophyte zone allows energy dissipation? N/A No Inlet Zone provided, refer to comments above
Structure from inlet zone to macrophyte zone enables isolation of the macrophyte N/A No Inlet Zone provided, refer to comments above
zone for maintenance?
Inlet zone permanent pool level above macrophyte permanent pool level? N/A No Inlet Zone provided, refer to comments above
Maintenance access allowed for into base of inlet zone? N/A No Inlet Zone provided, refer to comments above
Public safety design considerations included in inlet zone design? N/A No Inlet Zone provided, refer to comments above
Where required, gross pollutant protection measures provided on inlet structures Y GPT's and upstream Bioretention Basins provided at inflow locations to WQCP
(both inflows and to macrophyte zone)
MACROPHYTE ZONE Y N Comment
Extended detention depth >0.25m and <0.5m? Y Extended Detention Depth = 400mm
Vegetation bands perpendicular to flow path? N/A Not Applicable - A WQCP is proposed not a wetland. Furthermore the Pond is not
required to meet site WQO's.
Appropriate range of macrophyte vegetation (ephemeral, shallow, marsh, deep N/A Not Applicable - A WQCP is proposed not a wetland. Furthermore the Pond is not
marsh)? required to meet site WQO's.
Sequencing of vegetation bands provides continuous gradient to open water zones? N/A Not Applicable - A WQCP is proposed not a wetland. Furthermore the Pond is not
required to meet site WQO's.
Vegetation appropriate to selected band? N/A Not Applicable - A WQCP is proposed not a wetland. Furthermore the Pond is not
required to meet site WQO's.
Aspect ratio provides hydraulic efficiency =>0.5? N/A Not Applicable - A WQCP is proposed not a wetland. Furthermore the Pond is not
required to meet site WQO's.
Velocities from inlet zone <0.05 m/s or scouring protection provided? Y Scour Protection has been sized in accordance with QUDM (2013) specifications
Public safety design considerations included in macrophyte zone (i.e. batter slopes Y Refer to Operational Works Drawing No. 16-001014-400 Series. Proposed fencing
less than 5(H):1(V)? surrounding all edges of WQCP, slight grades for safety is also proposed, 2m
benching around wetland is provided along macrophyte zone (with slopes larger than
1:8)
Maintenance access provided into areas of the macrophyte zone (especially open Y Access provided to WQCP
water zones)?
Safety audit of publicly accessible areas undertaken? Y Refer to Operational Works Drawing No. 16-001014-400 Series for safety features
surrounding WQCP.
Freeboard provided above extended detention depth to define embankments? Y 300mm freeboard provided to minimum top of embankment level as per specifications
provided in the latest issue of the SWMP Report No. 16-001014-01.
OUTLET STRUCTURES Y N Comment
Riser outlet provided in macrophyte zone? Y Refer to the latest issue of the SWMP Report No. 16-001014-01.
Notional detention time of 48-72 hours? Y Nominal Detention Time of 55 hrs determined in latest issue of the SWMP Report No.
16-001014-01.
Orifice configuration allows for a linear storage-discharge relationship for full range of Y Nominal Detention Time in the latest issue of the SWMP Report No. 16-001014-01.
the extended detention depth?
Maintenance drain provided? Y Pumping of deep water zones proposed.
Discharge pipe has sufficient capacity to convey maximum of either the maintenance Y Riser calculations confirm sufficiency of discharge pipe
drain flows or riser pipe flows with scour protection?
Protection against clogging of orifice provided on outlet structure? Y Refer to Operational Works Drawing No. 16-001014-400 Series for details.
OTHER COMMENTS
Page 26
SAFETY IN DESIGN HAZARD REPORT
Project No. / Name: B14158.W/Palm Lakes Retirement Village Date: 12 September 2016
Stage 1A Central Basin (Wetland & Detention)
Stage of Review: 75% review Designer: Christopher Mok
Participants: Name Organisation Role
Christopher Mok Calibre Consulting Engineer
Matthew Starr Calibre Consulting Senior Engineer
Distribution:
Safety in Design Report Requirement: (yes) / (no):
Does the structure create a risk to the health and safety of persons who are to carry out any construction work on the structure or part?
Are the risks associated only with this particular design and not other designs of the same type of structure?
Notes:
1) If yes is answered to both questions, a Safety in Design Report must be provided to the Person Conducting a Business or Undertaking (PCBU) who commissioned the
design (i.e. the Client);
2) If no is answered to either question, a Safety in Design report does not need to be provided to the PCBU who commissioned the design, however relevant information
regarding management of identified hazards, if any, must be kept;
3) The purpose of this report is to document and communicate the hazards associated with the design including the nominated control for either eliminating or minimising
the risk to health and safety as far as is reasonably practicable;
4) Considerations that are not applicable are to be removed from the final report.
Legend:
Calibre Consulting Principal Contractor Client Other (Specify)
Document: QAF2024 Safety in Design Hazard Report – Generic
Revision 10 – 10/02/2015 Page 1 of 12
File: H:\B14\150-199\B14158.W\01 Final Layout Op Works\Checklists\B14158.W - Safety in Design_WQCP.docx [Update to show User's file] Calibre Consulting (Aust) Pty Ltd
Page 27
SAFETY IN DESIGN HAZARD REPORT
App? Action
Consideration Hazard / Comment Controlling Action Action By
Status
Existing site conditions:
Contaminated materials including biological N/A
hazards
Existing services including relocations Potential injury/death due to striking of Appropriate warning notes provided on Designer / Complete on
existing services located along roads, engineering plans. DBYD investigation Contractor plans/
external intersections undertaken and design has been
undertaken to minimise risk due to existing
Ongoing for
construction
services. Contractor to locate all services
prior to ground disturbance/excavation.
Existing site uses and users No existing users
Adjacent land uses and users Risk of unauthorised entry and works Contractor/Principal to provide adequate Contractor/ Prior to
near public road. site controls including fencing if required to Principal Construction
perimeter of the site to limit access and
reduce risks associated with unauthorised
entry
Geotechnical conditions and likely method of Conventional, however deep All works to be undertaken in accordance Contractor During
excavation excavations are likely and additional with standards and WH&S requirements. Construction
control measures may be required by
contractor
Ground water Likely to be encountered in low lying To be managed by contractor and Contractor/ During
areas and gullies. superintendent during construction. Superintend Construction
ent
Susceptibility to flooding including overland Overland flowpaths exist with the Gullies and channels to be avoid during Contractor During
flow paths and floodways potential for significant flooding along times of high rainfall Construction
the main gullies
Existing provision for access including traffic, Hazards associated with existing road Appropriate traffic management to be Contractor During
residential, pedestrian, equestrian, etc. surrounding the site. implemented by the contractor throughout Construction
the duration of the works
Existing bus routes and bus stops
Existing features of cultural, archaeological, None associated with Stage 1A
heritage and / or environmental significance Central Wetland
Design:
Document: QAF2024 Safety in Design Hazard Report – Generic
Revision 10 – 10/02/2015 Page 2 of 12
File: H:\B14\150-199\B14158.W\01 Final Layout Op Works\Checklists\B14158.W - Safety in Design_WQCP.docx [Update to show User's file] Calibre Consulting (Aust) Pty Ltd
Page 28
SAFETY IN DESIGN HAZARD REPORT
App? Action
Consideration Hazard / Comment Controlling Action Action By
Status
Unusual or atypical design features Fall hazard associated with high Safety fences to be provided where hazard Designer/ During
retaining walls, deep excavations and exists as per Operational Works Design Landscape Construction
works around services. Drawings. Engineering design to specify Architect/Co
interim star picket safety fencing for
Operational Works drawings prior to
ntractor
establishment of vegetation. Contractor and
superintendent to identify risk prior to
construction occurring.
Construction:
Method of construction Conventional hazards associated with All works to be undertaken in accordance Contractor During
subdivision works applies with the requirements of the subdivision Construction
guidelines and operational works in
accordance with WH&S requirements.
Access Access to the site via public roads and Engineering plans refer to provision of Contractor During
requires adequate traffic management adequate traffic control by the contractor as Construction
a part of the operational works in
accordance with WH&S requirements
Crane / Plant requirements All hazards associated with plant All works to be undertaken in accordance Contractor During
operations for subdivision works with WH&S requirements including work Construction
applies method statements for operation of plant as
required
Maintenance:
Method of maintenance Addressed in Concept Stormwater All structures designed in accordance with Designer Complete
Management Construction and Council and Water by Design standards.
Maintenance Plan (Report No. Engineering plans forwarded to Council for
B14158.W-05B dated November Operational Works approval. Appropriate
2015) Maintenance measures outlined in report.
Demolition:
Method of demolition N/A Best Practice/ Compliance
High Risk Construction Activities:
A person could fall more than 2m Injury/Death resulting from falling from Safety fencing to all walls over 1m specified Designer/Co Ongoing
retaining walls/deep excavations on drawings unless appropriate landscape
buffers provided. Contractor to ensure
ntractor
adequate fall protection (temporary fencing)
Document: QAF2024 Safety in Design Hazard Report – Generic
Revision 10 – 10/02/2015 Page 3 of 12
File: H:\B14\150-199\B14158.W\01 Final Layout Op Works\Checklists\B14158.W - Safety in Design_WQCP.docx [Update to show User's file] Calibre Consulting (Aust) Pty Ltd
Page 29
SAFETY IN DESIGN HAZARD REPORT
App? Action
Consideration Hazard / Comment Controlling Action Action By
Status
is provided to retaining walls over 1m in /Landscape
height Architect
Safety fences to be provided where hazard
exists as per Operational Works Design
Drawings
Work is on a telecommunication tower
Involves demolition of an element of a
structure that is load-bearing or otherwise
related to the physical integrity of the structure
Involves, or is likely to involve, the disturbance
of asbestos
Involves structural alterations or repairs that
require temporary support to prevent collapse
In or near a confined space Structures and manholes Undertake works in accordance to Council Designer / Ongoing
standards. Construction procedures to be Contractor
undertaken in accordance with WH&S
requirements.
In or near a shaft or trench with an excavated Excavation depths are anticipated to Undertake work in accordance to Council Designer/ Ongoing
depth greater than 1.5m or is carried out in or exceed 1.5m standards. Construction procedures to be
near a tunnel undertaken in accordance with WH&S
Contractor
requirements.
Involves the use of explosives
Is carried out in or near
Pressurised gas distribution mains or
piping
Chemical, fuel or refrigerant lines
Energised electrical installations or
services
Involves tilt-up or precast concrete Precast stormwater manholes All works to be undertaken in accordance Contractor During
with WH&S requirements including work Construction
method statements
Document: QAF2024 Safety in Design Hazard Report – Generic
Revision 10 – 10/02/2015 Page 4 of 12
File: H:\B14\150-199\B14158.W\01 Final Layout Op Works\Checklists\B14158.W - Safety in Design_WQCP.docx [Update to show User's file] Calibre Consulting (Aust) Pty Ltd
Page 30
SAFETY IN DESIGN HAZARD REPORT
App? Action
Consideration Hazard / Comment Controlling Action Action By
Status
On, in or adjacent to a road, railway, shipping Potential injury or death to existing Engineering plans refer to provision of Contractor During
lane or other traffic corridor that is in use by road users as the result of construction adequate traffic control by the contractor as Construction
traffic other than pedestrians works a part of the operational works in
accordance with WH&S requirements. This
may also include interim fencing for the site
including signage
In an area at a workplace in which there is any All hazards associated with plant All works to be undertaken in accordance Contractor During
movement of powered mobile plant operations applies with WH&S requirements including work Construction
method statements for operation of plant as
required and site inductions for all visitors
In an area in which there are artificial
extremes of temperature
In or near water or other liquid that involves a Project involves construction of a small Appropriate safety fencing and warnings Contractor During
risk of drowning pond. This may pose a potential signs to be erected during construction. Construction
drowning risk. Area to be avoid during periods of rainfall.
The following safety measures have been Designer Complete on
incorporated into the basin design plans
Thick planting and safety bench around
the perimeter of the pond to discourage
entry into pond
Retaining walls over 1m are to be
fenced. Maximum height is 2.1m.
There are multiple points around the
basin with batter slopes flatter than 1 in
5 to enable easy access out of the basin
area
1 in 6 access track provided at the
downstream end of the basin
Therefore access to the water edge is
limited and the water edge is densely
planted on a safety bench. No edge of water
fencing is required.
Document: QAF2024 Safety in Design Hazard Report – Generic
Revision 10 – 10/02/2015 Page 5 of 12
File: H:\B14\150-199\B14158.W\01 Final Layout Op Works\Checklists\B14158.W - Safety in Design_WQCP.docx [Update to show User's file] Calibre Consulting (Aust) Pty Ltd
Page 31
SAFETY IN DESIGN HAZARD REPORT
App? Action
Consideration Hazard / Comment Controlling Action Action By
Status
Involves diving work
Emergency Management
Fire / Bushfire
Emergency Services Access Potentially required throughout the Contractor to ensure that clear access is Contractor Ongoing
duration of construction available at all times for emergency vehicles
Hazardous Manual Tasks:
A task that requires a person to lift, lower, Accident/Injury/Death resulting from Contractor to ensure all works on-site Contractor Ongoing
push, pull, carry or otherwise move, hold or manual task. comply the WH&S requirements and that
restrain any person, animal or thing involving SWMS are prepared for each activity as
one or more of the following: required.
repetitive or sustained force
high or sudden force Accident/Injury/Death resulting from Contractor to ensure all works on-site Contractor Ongoing
manual task. comply the WH&S requirements and that
SWMS are prepared for each activity as
required.
repetitive movement Accident/Injury/Death resulting from Contractor to ensure all works on-site Contractor Ongoing
manual task. comply the WH&S requirements and that
SWMS are prepared for each activity as
required.
sustained or awkward posture Accident/Injury/Death resulting from Contractor to ensure all works on-site Contractor Ongoing
manual task comply the WH&S requirements and that
SWMS are prepared for each activity as
required.
exposure to vibration Accident/Injury/Death resulting from Contractor to ensure all works on-site Contractor Ongoing
manual task. comply the WH&S requirements and that
SWMS are prepared for each activity as
required.
Earthworks:
Staging
Document: QAF2024 Safety in Design Hazard Report – Generic
Revision 10 – 10/02/2015 Page 6 of 12
File: H:\B14\150-199\B14158.W\01 Final Layout Op Works\Checklists\B14158.W - Safety in Design_WQCP.docx [Update to show User's file] Calibre Consulting (Aust) Pty Ltd
Page 32
SAFETY IN DESIGN HAZARD REPORT
App? Action
Consideration Hazard / Comment Controlling Action Action By
Status
Method of excavation & plant requirements Conventional plant required for Contractor to ensure all works on-site Contractor Ongoing
excavation works comply the WH&S requirements and that
SWMS are prepared for each activity as
required.
Earthworks balances and location of stockpile spoil area for topsoil Contractor to ensure all works on-site Contractor Ongoing
material comply the WH&S requirements and that
SWMS are prepared for each activity as
required.
Depth of excavations Deep excavations for services Contractor to ensure all works on-site Contractor Ongoing
comply the WH&S requirements and that
SWMS are prepared for each activity as
required.
Adjacent properties affected by earthworks / Damage or injury to adjacent Contractor to ensure all works on-site Contractor Ongoing
excavations residents/unauthorised access to site. comply the WH&S requirements and that
SWMS are prepared for each activity as
required. Contractor to ensure that adjacent
properties are protected at all times during
construction. Site controls to be
implemented to avoid unauthorised access.
Road / Pavement / Carpark Design:
Road alignment and cross section
Pavement materials
Provision for pedestrians, cyclists, public
transport, heavy vehicles, emergency
vehicles, maintenance operations
Noise generation
Lighting
Crime prevention
Edge protections / guardrails / barriers
Drainage Conventional Comply to Standards Designer Complete
Document: QAF2024 Safety in Design Hazard Report – Generic
Revision 10 – 10/02/2015 Page 7 of 12
File: H:\B14\150-199\B14158.W\01 Final Layout Op Works\Checklists\B14158.W - Safety in Design_WQCP.docx [Update to show User's file] Calibre Consulting (Aust) Pty Ltd
Page 33
SAFETY IN DESIGN HAZARD REPORT
App? Action
Consideration Hazard / Comment Controlling Action Action By
Status
Stormwater, Water and Sewer Design:
Compliance
Flow capacity of pipes and structures Comply to Standards Designer Complete
Compliance
Structural capacity of pipes and structures Comply to Standards Designer Complete
Compliance
Cast in-situ structures Comply to Standards Designer Complete
Compliance
Pre-cast structures Comply to Standards Designer Complete
Access to pipes and structures – i.e. ladder Compliance Comply to Standards Designer Complete
and fall protection requirements
Stormwater Pond Design:
Access to stormwater ponds including
restricted access and access for maintenance
Stormwater pond water quality
Permanent pond design Drowning Appropriate safety fencing and warnings Contractor During
signs to be erected during construction. Construction
Area to be avoid during periods of rainfall.
Designer Finalise at
The following safety measures have been OP Works
incorporated into the basin design
Thick planting and safety bench around
the perimeter of the pond to discourage
entry into pond
Retaining walls over 1m are to be
fenced. Maximum height is 2.1m.
There are multiple points around the
basin with batter slopes flatter than 1 in
5 to enable easy access out of the basin
area
1 in 6 access track provided at the
downstream end of the basin
Document: QAF2024 Safety in Design Hazard Report – Generic
Revision 10 – 10/02/2015 Page 8 of 12
File: H:\B14\150-199\B14158.W\01 Final Layout Op Works\Checklists\B14158.W - Safety in Design_WQCP.docx [Update to show User's file] Calibre Consulting (Aust) Pty Ltd
Page 34
SAFETY IN DESIGN HAZARD REPORT
App? Action
Consideration Hazard / Comment Controlling Action Action By
Status
Therefore access to the water edge is
limited and the water edge is densely
planted on a safety bench. No edge of water
fencing is required.
Temporary pond design
Wall Design:
Handrails / edge protection Fall hazard All walls exceeding 1.0m in height to be Designer/
appropriate fenced Landscape
Architect
Product selection. Consider sustainability, Concrete and Boulder walls Standard Construction methods Contractor Complete
constructability, maintainability and manual
handling
Fall protection requirements such as provision Fall hazard All walls exceeding 1.0m in height to be Designer/
of anchorage points appropriate fenced Landscape
Architect
Workplace space and layout for constructing High wall construction Contractor to comply with all WH&S Contractor During
wall requirements during construction Construction
Depth of footings Conventional Contractor to comply with all WH&S Contractor During
requirements during construction and Construction
structural certification to verify wall
construction.
Possible future works around footings
Load bearing restrictions Load restrictions on retaining walls Load restrictions specified on typical Designer/ Ongoing
retaining wall deigns. Contractor to comply Contractor
or provide alternative design certification for
alternative products.
Bridge Design:
Structural capacity
Cast in-situ versus precast
Document: QAF2024 Safety in Design Hazard Report – Generic
Revision 10 – 10/02/2015 Page 9 of 12
File: H:\B14\150-199\B14158.W\01 Final Layout Op Works\Checklists\B14158.W - Safety in Design_WQCP.docx [Update to show User's file] Calibre Consulting (Aust) Pty Ltd
Page 35
SAFETY IN DESIGN HAZARD REPORT
App? Action
Consideration Hazard / Comment Controlling Action Action By
Status
User separation including handrails and
guardrails – consider misuse
Edge protection including safety / noise
screens – consider misuse
Load bearing restrictions
Product selection. Consider sustainability,
constructability, maintainability and manual
handling
Provision for lifting points and anchorage
points
Provision and location of proposed services
Underpass Design:
Users and access requirements
Susceptibility to flooding
Crime prevention
Product selection. Consider sustainability,
constructability, maintainability and manual
handling
Building Design:
Structural capacity
Product selection. Consider sustainability,
constructability, maintainability and manual
handling
Cast in-situ versus precast
Load bearing restrictions
Provision for lifting points and anchorage
points
Provision and location of proposed services
Document: QAF2024 Safety in Design Hazard Report – Generic
Revision 10 – 10/02/2015 Page 10 of 12
File: H:\B14\150-199\B14158.W\01 Final Layout Op Works\Checklists\B14158.W - Safety in Design_WQCP.docx [Update to show User's file] Calibre Consulting (Aust) Pty Ltd
Page 36
SAFETY IN DESIGN HAZARD REPORT
App? Action
Consideration Hazard / Comment Controlling Action Action By
Status
Basement design
Geotechnical constraints
Ground water
Re-design
Demolition
Landscape Design:
Crime prevention By Others
By Others
Visibility
By Others
Interaction with services
Product selection. Consider sustainability, By Others
constructability, maintainability and manual
handling
Proposed Services:
Location and design of proposed services Potential safety issues associated with All services identified on the engineering Designer
including Interaction with existing services as work near existing live services plans and contractor to undertake works in
well as those from adjacent developments including, water reticulation, electrical accordance with industry best practice and
reticulation and gas reticulation provide work method statements for works
near mains. All services to be identified prior
to excavation works occurring
Depth of proposed services Proposed excavations exceed 1.5m in Contractor to comply with WH&S Designer/ Ongoing
depth requirements during construction and Contractor
provide SWMS where required. Design
undertaken to reduce trench depths where
possible.
Geotechnical impact on trench excavations Injury/death resulting from trench All works to be undertaken in accordance Contractor Ongoing
collapse. with the requirements of the subdivision
guidelines and operational works in
accordance with WH&S requirements.
Protection of existing services
Contractor to comply with WH&S
requirements during construction and
Contractor Ongoing
Document: QAF2024 Safety in Design Hazard Report – Generic
Revision 10 – 10/02/2015 Page 11 of 12
File: H:\B14\150-199\B14158.W\01 Final Layout Op Works\Checklists\B14158.W - Safety in Design_WQCP.docx [Update to show User's file] Calibre Consulting (Aust) Pty Ltd
Page 37
SAFETY IN DESIGN HAZARD REPORT
App? Action
Consideration Hazard / Comment Controlling Action Action By
Status
provide and identify all existing services
prior to commencing construction. SWMS
where required.
Accessibility to services including pits / Confined space risks Contractor to comply with WH&S Contractor Ongoing
manholes / sumps for future maintenance. requirements during construction and
Consider location, access in, within and out. provide SWMS where required.
Location of substations
Document: QAF2024 Safety in Design Hazard Report – Generic
Revision 10 – 10/02/2015 Page 12 of 12
File: H:\B14\150-199\B14158.W\01 Final Layout Op Works\Checklists\B14158.W - Safety in Design_WQCP.docx [Update to show User's file] Calibre Consulting (Aust) Pty Ltd
Page 38
WQCP ‐ Energy Dissipater Calculations (Derived From QUDM, 2013)
Pipe Outlets
Sizing of the scour rock protection for pipes was determined using calculations specified in Section
8.7 of QUDM, 2013. Below indicates rock protection requirements and the adopted outlet rock
protection configuration at each pipe outlet.
Central Bioretention Basin South Discharge into Central Pond Outlet into
Location
Outflow into Pond (375) Central Pond (900) Existing Swale (825)
Q (m3/s) 0.23 1.275 2.2
Area (m2) 0.1 0.6 0.5
Outlet Velocity (m/s) 2 2.0 4.1
Pipe Diameter 0.375 0.9 0.825
Multiple Cells? NO NO NO
Multiplication Factor for Multiple Cells N/A N/A N/A
Length Ratio D:L 3 3 5
Width (m) 1.4 2.6 3.1
Length (m) 1.125 2.7 4.125
d50 (mm) 200 200 300
Thickness of Rock Protection (mm) 400 400 600
Page 39
Multi‐Pipe Outlet
Sizing of the scour rock protection for the proposed multiple pipe outlet was determined using
calculations specified in Section 10.4.15 of QUDM, 2013. Below indicates rock protection
requirements and the adopted outlet rock protection configuration at each pipe outlet.
Central Basin Overflows
Location
(2 x 1050)
Catchments B1, B2
Q (m3/s) 1.5
Area (m2) 1.7
Outlet Velocity (m/s) 0.87
Diameter (m) 1.05
No of Cells 2
Equivalent Diameter (m) 1.45
Multiplication Factor for Multiple Cells N/A
Length Ratio D:L 3
Width (m) 1.45
Length (m) 4.35
d50 (mm) 200
Thickness of Rock Protection (mm) 400
Page 40
WQCP Design Velocity Check
Since the pond has not been modelled in MUSIC and therefore isn’t ‘required’ for stormwater quality
treatment, the re‐suspension of suspended solids is not critical (i.e. WQOs will still be met for the
site if the amount of total suspended solids pollutant loads discharging into the pond is the same of
that discharging from the pond). The treatment that the pond will contribute to the site has not
been modelled in the stormwater quality management strategy.
Notwithstanding this, velocity checks were undertaken to ensure no scouring of macrophyte plants
and to demonstrate that re‐suspension of TSS is unlikely to occur.
First Assessment Criterion
For Macrophyte Zone Resuspension Protection, Equation 6.3 in WSUD Technical Design Guidelines
(2006) indicates the objective for velocities within typical wetland to ensure that stored pollutants
are not resuspended or remobilised. Figure A indicates Equation 6.3.
Figure A – Equation 6.3 from WSUD Technical Design Guidelines (2006)
As per the Constructed WQCP Design Calculations Summary provided in this Appendix, velocities
based on this first criterion are 0.001m/s, which is below the minimum requirement and meets the
design objective.
Qmax riser is typically determined by the outlet conditions (i.e. riser pit), which is low due to retention
features of the wetland. This is the frequent flow check resulting from drainage of the extended
detention depth.
Second Assessment Criterion
For events greater than frequent flow ponding, the detention basin will have near zero velocity. We
have undertaken a check based on the total basin ponding. For flows greater than frequent flows we
have adopted Qmax riser using peak inflows derived from XP‐RAFTS, i.e. peak flows entering the basin
without considering backwater effects. This is conservative and will result in higher velocities than
what will actually occur in operation.
Velocities were determined at the critical section of the WQCP as indicated in the Figure A.
Page 41
Critical Section
Figure A – Critical Section Through WQCP
Cross Sectional Area (A) was determined at the critical section using the basin water levels
determined in XP‐RAFTS for each storm event (63% to 1% AEP). Results are indicated in Table 1
below.
Page 42
Design Velocity Check Through Critical Section of WQCP
Filename: H:\B14\150-199\B14158.W\01 Final Layout Op Works\Checklists\[B14158.W_Riser Calc.xlsx]Crit. Section
Date: 5/09/2016
By: CM
Critical Section Through WQCP
1 to102.5
100 Y ARI
WSL (m) 100.28 m3/s
102
Basin Water Depth Above Extended Detention Depth (m) Cross Sectional Area (m2)
101.5 1 0.43 100.28 14.25
2 0.54 100.50 19.86
5 0.66 100.65 23.97
101
10 0.73 100.77 27.42
20 0.82 100.90 31.39
100.550 0.89 100.97 33.50
100 0.96 101.03 35.41
100
Extended Detention Depth
99.5 WSL (m) Design Channel
99
0 5 10 15 20 25 30 35 40
Basin Water Depth Above Extended
AEP (%) Qin at B2 (m3/s) Cross Sectional Area (m2) Velocity (m/s)
Detention Depth (m)
63% 2.58 0.43 14.25 0.18
39% 2.97 0.54 19.86 0.15
18% 3.52 0.66 23.97 0.15
10% 3.96 0.73 27.42 0.14
5% 4.30 0.82 31.39 0.14
2% 4.64 0.89 33.63 0.14
1% 5.07 0.96 35.41 0.14
As indicated in the results, velocities range from 0.14m/s to 0.18m/s at the critical section. This is
only slightly above the velocity re‐suspension objective of 0.05m/s, but is well below the velocity
limits of 0.5m/s and 2.0m/s to protect against vegetation scour, as provided in Section 2.3.5 of the
WSUD Technical Design Guidelines (2006).
The following should also be considered:
As mentioned the velocity check equation indicated in WSUD Technical Design Guidelines
(2006) is determined based on outflow conditions. Our calculations have conservatively
considered basin inflow conditions.
The velocities determined do not take into account backwater effect caused by the outlet
that has been designed to restrict flows for detention. This will reduce velocities.
The velocities do not take into account the coincidence of flows from both that is expected
to reduce velocities further.
The results above demonstrate that the velocities through the WQCP are appropriate to avoid scour
and are unlikely to cause re‐suspension of stored pollutants.
Page 43
Inflow – Nutrient Concentrations Into WQCP As Council have requested, the WQCP has not been modelled in MUSIC. This is conservative considering that the pond will provide treatment to suspended solids and some nutrient removal. In order to avoid outbreaks of algae in the pond, the concentrations of nutrients entering the pond must be limited (i.e. TN and TP inflow concentrations less than 1.3mg/L and 0.2mg/L respectively). The proposed stormwater quality management strategy involving a treatment train of primary, secondary and tertiary treatment devices ensures that runoff into the pond has low nutrient loading. The TP and TN inflow concentrations are indicated in the table below. B14158.W_Opworks_Mitigated_Site_Ext_NoPond ‐ (Pond) ‐ Flow‐Based Sub‐Sample Statistics Inflow mean standard deviation median maximum minimum 10 percentile 90 percentile Flow (cubic metres/sec) 0.00501 0.0469 0.0000154 4.56 0 0 0.00348 TSS Concentration (mg/L) 2.61 7.46 2.21 350 0 0 2.8 Log [TSS] (mg/L) 0.376 0.18 0.365 2.54 0.193 0.241 0.456 TP Concentration (mg/L) 0.0192 0.0199 0.02 0.666 0 0 0.0221 Log [TP] (mg/L) ‐1.67 0.115 ‐1.7 ‐0.177 ‐1.7 ‐1.7 ‐1.64 TN Concentration (mg/L) 0.518 0.261 0.6 3.33 0 0 0.6 Log [TN] (mg/L) ‐0.214 0.0553 ‐0.222 0.522 ‐0.222 ‐0.222 ‐0.222 TSS Load (kg/Day) 0.106 2.38 0.000013 307 0 0 0.00222 TP Load (kg/Day) 0.000276 0.00528 0.000000114 0.557 0 0 0.0000253 TN Load (kg/Day) 0.00252 0.0364 0.00000332 4.27 0 0 0.000752 Gross Pollutant Load (kg/Day) 0.000218 0.0166 0 6.21 0 0 0 Results indicate that concentration of TP and TN are well below the required limits.
Page 44
Appendix A2 - WCQP Construction Phase Water Quality Control Pond Construction and Establishment Sign‐Off Forms (Water By Design)
Page 45
Construction and Establishment Sign-
Off Forms: Constructed Wetlands
Version 1 .1, April 2010
The Construction and Establishment Sign-Off Forms: Constructed Wetlands outline the key items to be
reviewed when delivering and inspecting constructed stormwater wetlands.
The Sign-Off Forms follow the construction step-by-step sequences described in Sections 4.7
and 4.8 of the Construction and Establishment Guidelines: Swales, Bioretention Systems and
Wetlands (Water by Design, 2010, accessible from www.waterbydesign.com.au).
The Sign-off Forms are to be used by contractors, construction site supervisors, designers and local
authority compliance officers to ensure all the elements of the constructed wetland have been
constructed in accordance with the design. It is the responsibility of the site superintendent and
contractor to ensure the most recent version of the forms are being used. These can be accessed from
www.waterbydesign.com.au
The Sign-Off Forms are the basis of the certification and compliance requirements for constructed
wetlands. They are designed for incorporation into asset databases managed by councils or private
organisations such as body corporates.
The following Sign-Off Forms are provided:
Constructed Wetland Construction and Establishment Sign-Off Forms
Pre-Start Meeting Sign-Off Form
FORM A — Earthworks Bulking Out and Profiling
FORM B — Bunds and Impervious Liner (where required)
FORM C — Hydraulic and Function Structures
FORM D — Topsoil and Finished Levels
FORM E — Building Phase (Macrophyte) Protection
FORM F — Macrophyte Zone Landscape Installation
FORM G — Macrophyte Zone Landscape Establishment
FORM H — Inlet Zone Landscape Installation and Establishment.
If an item receives an ‘N’ in the ‘Satisfactory’ criteria, indicating that elements are not satisfactory, actions
must be specified and delivered to rectify the construction issue before final inspection sign-off is given.
Disclaimer
The material contained in this publication is produced for general information only. It is not intended as
professional advice on specific applications. It is the responsibility of the user to determine the suitability
and appropriateness of the material contained in this publication to specific applications. No person
should act or fail to act on the basis of any material contained in this publication without first obtaining
specific independent professional advice. The South East Queensland Healthy Waterways Partnership
(SEQHWP) expressly disclaim all and any liability to any person in respect of anything done by any such
person in reliance, whether in whole or in part, on this publication. The information contained in this
publication does not necessarily represent those of the funding partners.
CONSTRUCTION & ESTABLISHMENT SIGN-OFF FORMS – CONSTRUCTED WETLANDS
Asset I.D. DA No.
1
CONSTRUCTION AND ESTABLISHMENT SIGN-OFF FORMS – CONSTRUCTED WETLANDS
Version 1, February 2009© South East Queensland Healthy Waterways Partnership 2010
©South East Queensland Healthy Waterways Partnership 2009
Page 46
Wetland location:
Area: Catchment Area (ha): Wetland Macrophyte Area (ha):
Civil drawing no
Landscape drawing
no.
Role/Stakeholder Company Contact Name Contact Details
Developer
Site superintendent
(civil)
Site superintendent
(landscape)
Wetland designer
Civil engineer
Landscape architect
Civil contractor
Landscape contractor
Council compliance
officer
Checklist of Sign-Off Forms
Date Name of Signatory & Role
Sign-Off Form Signature
Completed (Superintendent)
Pre-Start Meeting
Form A — Earthworks Bulking
Out and Profiling
Form B — Bunds and Impervious
Liner (where required)
Form C — Hydraulic and
Functional Structures
Form D — Topsoil and Finished
Levels
Form E — Building Phase
(Macrophyte) Protection
Form F — Macrophyte Zone
Landscape Installation
Form G — Macrophyte Zone
Landscape Establishment
Form H — Inlet Zone Landscape
Installation and Establishment
Pre-Start Meeting
Pre-starting attendees to be listed and sign that that have attended and understand the design intent, construction and establishment
process.
2
CONSTRUCTION AND ESTABLISHMENT SIGN-OFF FORMS – CONSTRUCTED WETLANDS
Version 1, February 2009© South East Queensland Healthy Waterways Partnership 2010
©South East Queensland Healthy Waterways Partnership 2009
Page 47
Location
Date
Role/Stakeholder Company Contact Name Sign
Developer
Site superintendent
(civil)
Site superintendent
(landscape)
Wetland designer
Civil engineer
Landscape architect
Civil contractor
Landscape contractor
Other
Other
Other
Comments (attach and refer to additional pages if necessary)
Actions (attach and refer to additional pages if necessary)
FORM A — Earthworks Bulking Out and Profiling
Purpose: To ensure earthworks bulking out, trimming and profiling is in accordance with design drawings and
specifications (allowance for 300 mm topsoil and, where required, minimum 300 mm of impervious liner).
3
CONSTRUCTION AND ESTABLISHMENT SIGN-OFF FORMS – CONSTRUCTED WETLANDS
Version 1, February 2009© South East Queensland Healthy Waterways Partnership 2010
©South East Queensland Healthy Waterways Partnership 2009
Page 48
Items Checked Satisfactory Action (if unsatisfactory) Initial
As-constructed survey completed and
attached to this form
Photos taken and attached to this form
Set out of wetlands is correct including
macrophyte zone, inlet zone and high-
flow bypass
Levels are at correct elevation (+50
mm) allowing for 300 mm topsoil and
where required 300 mm impervious
liner
HOLD POINT: Superintendent and wetland designer inspection and sign-off before proceeding.
Comments (attach and refer to additional pages if necessary)
NB: As-constructed survey or drawings and photos attached.
Signed by superintendent:
Print name:
Date:
AND
Signed by wetland designer:
Print name:
Date:
FORM B — Bunds and Impervious Liner
Purpose: To ensure the bunds are installed and sealed and the impervious liner is constructed as per the specifications
and the test results verify this.
Items Checked Satisfactory Action (if unsatisfactory) Initial
4
CONSTRUCTION AND ESTABLISHMENT SIGN-OFF FORMS – CONSTRUCTED WETLANDS
Version 1, February 2009© South East Queensland Healthy Waterways Partnership 2010
©South East Queensland Healthy Waterways Partnership 2009
Page 49
As-constructed survey complete for
top of bunds and liner
Laboratory tests results of liner
material submitted and adequate
Delivery docket of liner material
supplied
Liner material installed and sealed
as per specification
Geotechnical engineer certification
of in-situ compaction or liner
placement
Geotechnical engineer certification
of key bunds
HOLD POINT: Superintendent or wetland designer inspection and sign-off before proceeding.
Comments (attach and refer to additional pages if necessary)
NB: As-constructed survey or drawings and photos attached.
Signed by superintendent:
Print name:
Date:
AND
Signed by wetland designer:
Print name:
Date:
FORM C — Hydraulic and Functional Structures
Purpose: To ensure that the hydraulic structures associated with the wetland are constructed in accordance with design
and specifications.
Items Checked Satisfactory Action (if unsatisfactory) Initial
As-constructed survey completed
and attached to this form
5
CONSTRUCTION AND ESTABLISHMENT SIGN-OFF FORMS – CONSTRUCTED WETLANDS
Version 1, February 2009© South East Queensland Healthy Waterways Partnership 2010
©South East Queensland Healthy Waterways Partnership 2009
Page 50
Photos taken and attached to this
form
Inlet pipe and headwall at correct
locations and levels (+ 25 mm)
Inlet zone connection pit or pipe
correction size, location and level (+
25 mm)
Outlet riser connection, location, size
and levels or risers correct (+ 25 mm)
Outlet pipe and headwall at
correction locations and level (+ 25
mm)
Bypass weir correct width and level
(+ 25 mm)
Maintenance pipe and valve installed
at correct location and level
Maintenance access installed to inlet
zone
Rock or concrete base constructed to
inlet zone
Rock protection provided at correct
locations and rock size consistent
with design
Seepage collars installed to all pipe
outlets from wetland
HOLD POINT: Superintendent AND Wetland Designer inspection and review of test results and certifications
before proceeding.
Comments (attach and refer to additional pages if necessary)
NB: As-constructed survey or drawings and photos attached.
Signed by superintendent:
Print name:
Date:
AND
Signed by wetland designer:
Print name:
Date:
FORM D — Topsoil and Finished Levels
Purpose: To ensure the topsoil is installed to the correct depth and finished levels of wetland are correct and meet the
design.
Items Checked Satisfactory Action (if unsatisfactory) Initial
Topsoil meets the requirements of
AS4419 and laboratory tests
provided
6
CONSTRUCTION AND ESTABLISHMENT SIGN-OFF FORMS – CONSTRUCTED WETLANDS
Version 1, February 2009© South East Queensland Healthy Waterways Partnership 2010
©South East Queensland Healthy Waterways Partnership 2009
Page 51
Topsoil has been screened and is
free of large debris
Topsoil applied to wetland to a
minimum 300 mm depth
As-constructed survey of wetland
surface and surrounding bunds
completed
Final topsoil levels are consistent
with design levels (+ 50 mm). THIS
IS CRITICAL IN THE
MACROPHYTE ZONE.
Surface is smooth and free of local
depressions and debris
HOLD POINT: Superintendent and wetland designer inspection and sign-off before proceeding.
Comments (attach and refer to additional pages if necessary)
NB: As-constructed survey or drawings and photos attached.
Signed by superintendent:
Print name:
Date:
AND
Signed by wetland designer:
Print name:
Date:
FORM E — Building Phase (Macrophyte) Protection
Purpose: To ensure protective measures are correctly installed to protect the macrophyte zone during establishment
while building is occurring in the catchment.
Items Checked Satisfactory Action (if unsatisfactory) Initial
Silt fences installed around all
elements of wetland
High-flow bypass channel protective
measures in place (i.e. turf installed
and where required reinforced turf)
7
CONSTRUCTION AND ESTABLISHMENT SIGN-OFF FORMS – CONSTRUCTED WETLANDS
Version 1, February 2009© South East Queensland Healthy Waterways Partnership 2010
©South East Queensland Healthy Waterways Partnership 2009
Page 52
Inlet zone disconnected from
macrophyte zone (i.e. plates placed
on overflow pit and secured)
HOLD POINT: Superintendent or wetland designer inspection and sign-off before proceeding.
Comments (attach and refer to additional pages if necessary)
NB: As-constructed survey or drawings and photos attached.
Signed by superintendent:
Print name:
Date:
AND
Signed by wetland designer:
Print name:
Date:
FORM F — Macrophyte Zone Landscape Installation
Purpose: To ensure the correct plants are supplied, installed and established.
Items Checked Satisfactory Action (if unsatisfactory) Initial
Supplied plants are correct species
Species change must be approved by
wetland designer or ecologist and marked on
as-constructed drawings
Supplied plants are in correct pot sizes and
maturity (300mm min) and hardened
Plants have been installed at correct planting
density
8
CONSTRUCTION AND ESTABLISHMENT SIGN-OFF FORMS – CONSTRUCTED WETLANDS
Version 1, February 2009© South East Queensland Healthy Waterways Partnership 2010
©South East Queensland Healthy Waterways Partnership 2009
Page 53
As-constructed drawings marked up with final
plant species and densities
Water level control is operating appropriately
Correct mulch has been supplied and
installed to batters and bunds above the
extended detention and secured in place
HOLD POINT: Superintendent and wetland designer inspection and sign-off.
Comments (attach and refer to additional pages if necessary)
NB: As-constructed survey or drawings and photos attached.
Signed by superintendent:
Print name:
Date:
AND
Signed by wetland designer:
Print name:
Date:
FORM G — Macrophyte Zone Landscape Establishment
Purpose: To ensure the plants established.
Items Checked Satisfactory Action (if unsatisfactory) Initial
Weeds being removed as required
Watering occurring as required
Macrophyte plants have matured to a point
where water level in macrophyte zone can be
allowed to reach design level (typically 6–10
weeks after installation)
Macrophyte zone plants established (500 mm
above normal water level and propagation is
occurring)
9
CONSTRUCTION AND ESTABLISHMENT SIGN-OFF FORMS – CONSTRUCTED WETLANDS
Version 1, February 2009© South East Queensland Healthy Waterways Partnership 2010
©South East Queensland Healthy Waterways Partnership 2009
Page 54
Measure of successful establishment
1. Survivorship greater than 90%
2. Preferably more than one species per
macrophyte zone
3. At least 5 plants/m2 (preferably 6–10
plants/m2)
4. In create in plant height of at least 50%.
This can be measured through the use
of marker or stakes through the wetland
zones
5. Propagation is occurring (more than 2–3
stems, seeding)
6. No weeds.
Growth and maturity should be recorded
through three-monthly photo logs every 500
m2 .
HOLD POINT: Superintendent and wetland designer inspection and sign-off before proceeding.
Comments (attach and refer to additional pages if necessary)
NB: As-constructed survey or drawings and photos attached.
Signed by superintendent:
Print name:
Date:
AND
Signed by wetland designer:
Print name:
Date:
FORM H — Inlet Zone Landscape Installation and Establishment
Purpose: To ensure the correct plants are supplied, installed and established.
PLANT SUPPLY & INSTALLATION
Satisfactor
Items Checked Action (if unsatisfactory) Initial
y
Supplied plants are correct species. Species
change must be approved by wetland
designer or ecologist and marked on as-
constructed drawings.
Supplied plants are in correct pot sizes and
maturity (300 mm min) and hardened
Plants have been installed at correct planting
density
As-constructed drawings marked up with final
plant species and densities
10
CONSTRUCTION AND ESTABLISHMENT SIGN-OFF FORMS – CONSTRUCTED WETLANDS
Version 1, February 2009© South East Queensland Healthy Waterways Partnership 2010
©South East Queensland Healthy Waterways Partnership 2009
Page 55
HOLD POINT: Superintendent AND Wetland Designer inspection and sign-off before proceeding.
PLANT ESTABLISHMENT
Weeds being removed as required
Watering occurring as required
Plants have matured to a point where the
water level in macrophyte zone can be
allowed to reach design level (typically 6–10
weeks after installation).
Inlet zone plants established (500 mm above
normal water level and propagation is
occurring)
Comments (attach and refer to additional pages if necessary)
NB: As-constructed survey or drawings and photos attached.
Signed by superintendent:
Print name:
Date:
AND
Signed by wetland designer:
Print name:
Date:
11
CONSTRUCTION AND ESTABLISHMENT SIGN-OFF FORMS – CONSTRUCTED WETLANDS
Version 1, February 2009© South East Queensland Healthy Waterways Partnership 2010
©South East Queensland Healthy Waterways Partnership 2009
Page 56
Appendix A3 - WCQP Operational Phase Water Quality Control Pond Inspection and Maintenance Checklist Water Quality Control Pond Inspection and Maintenance Requirements Table 4: Guidance on how to rectify constructed wetlands (extract from Water By Design’s Rectifying Vegetated Stormwater Assets, 2012)
Page 57
Water Quality Control Pond Inspection & Maintenance Requirements
Treatment Device / Property Inspection Inspection Frequency Corrective Action1
Surrounds
Quarterly during dry season Repair or replace damage structure
Damaged or removed structures Check for damage that poses a risk to
and every two months
(e.g. fences & traffic bollards) public safety or structural integrity
during wet seasons
Inlet & Outlet
Check for evidence of erosion or
Erosion Remove any blockages or debris within inlet pits or blockages
subsidence/settlement near inlet structure
Quarterly during dry season
Damaged or Removed Structures
Check for damage to structure and every two months Replace damage structure
(e.g. pit lids or grates)
during wet seasons
Check for blockages, litter accumulation, Remove litter, debris and sediment accumulation
Sediment, Litter or Debris
sediment or debris. Check capacity of upstream Gross Pollutant Trap for clean out.2
Batter Slopes and Base Invert
Where erosion is only minor undertake filling, profiling, and (if
necessary) replanting using hand tools or light machinery. Where
Erosion Check for erosion along batter slopes
erosion is severe or reoccurring refer to WBD’s Rectifying Vegetated
Stormwater Assets (2012).
Depressions, mounds or isolated Check for surface depressions or mounds If depressions or mounds are >100mm then undertake filling, re‐
Quarterly during dry season
pools of water that could provide mosquito habitat profiling, and (if necessary) replanting.
and every two months
In areas where accessibility is safe & achievable remove litter
during wet seasons
Litter Check for litter immediately. Where accessibility is restricted undertake litter
removal litter when there is more than 1 piece of litter per 4m2
Unusual Odours, Colours or
Check for unusual odours, colours and
Substances Remove polluted material before it moves through the WQCP.
substances
(e.g. oil and grease)
Regular inspection as Remove sediment in dry weather or after a dry season.
Accumulated Sediment1 Check for accumulated coarse sediment. above. Clean out every 5 If major clean out is required follow procedures outlined in WBD’s
years Maintaining Vegetated Stormwater Assets (2012).
Check that the water level is not more than Quarterly during dry season Check outlet for damage or WQCP for possible leakages. Repair
Water levels 0.3m below the normal operating level for and every two months where necessary. If there are no blockages refer to WBD’s Rectifying
extended period during wet seasons Vegetated Stormwater Assets (2012).
* Significant Rain Event defined as a 24 hour period with rainfall greater than 100mm, or shorter period with an average rainfall intensity greater than 50mm/hour.
1. Maintenance Requirements are based on Water by Designs, Maintaining Vegetated Stormwater Assets (2012) and Rectifying Vegetated Stormwater Assets (2012). Refer to these documents for further details.
2. Refer to latest version of HumeGard Maintenance Guide for details of inspection and maintenance procedures.
Page 58
Treatment Device / Property Inspection Inspection Frequency Corrective Action1
Check 80% vegetation cover on batters and
Re‐establish vegetation using thriving vegetation within the asset
in water up to 300mm deep
Check that the average plant height is >
Vegetation Monitor plant growth where necessary
500mm
Check that plants are healthy and free If problem persists seek advice from a horticulturalist as per WBD’s
from significant disease. Rectifying Vegetated Stormwater Assets (2012).
Weeds2 Remove and control weed species. If problem is reoccurring increase
Check that weed cover is less than 10%
(emergent, floating or submerged) maintenance frequency for weed removal over a period
Undertake filling, profiling, and (if necessary) replanting using hand
Undertake mosquito testing ‐ 1 larvae per
Mosquitoes tools or light machinery. If problem persists refer to WBD’s
2 ladle dips (300mL ladle)
Rectifying Vegetated Stormwater Assets (2012).
Fertiliser3 Check for fertiliser on banks of WQCP Remove where fertiliser has not been specifically scheduled
Remove using rakes or specialist machinery.
If algal mats exceed 10%, the need to identify the source of the
Check that cover of algal mats does not Quarterly during dry season problem is required – refer to WBD’s Rectifying Vegetated
Algal Mats exceed 10% on two consecutive and every two months Stormwater Assets (2012)
inspections during wet seasons ‐ As high nutrient concentrations into the WQCP can result in
excessive algal mats, check upstream device (and clean out where
necessary), implement catchment management solutions.
Check that the water is clear, that is
turbidity is such that the floor of the pond Identify problem as per WBD’s Rectifying Vegetated Stormwater
can be seen at 0.75m depth Assets (2012) and implement necessary action:
Check for algal blooms ‐ Restrict access to WQCP using signage, public notification to
Check that macrophyte coverage to be prevent health risks (note basin area is fully fenced and separated
above 50% of the WQCP water surface. from public access)
Cyanobacterial Blooms If above indicators for cyanobacterial ‐ If low vegetation cover, immediately re‐establish. Replant with
blooms reveals non‐performance, water well‐established, dense vegetation.
quality testing is required. Performance ‐ If high nutrient concentrations in WQCP remove sediments, dry
indicator is ≤500cells/mL of Microcystis out WQCP for 1‐2weeks to destroy algae, remove nutrient source,
aeruginosa or biovolume equivalent replant if necessary.
≤0.04mm3/mL combined total of
cyanobacteria.
* Significant Rain Event defined as a 24 hour period with rainfall greater than 100mm, or shorter period with an average rainfall intensity greater than 50mm/hour.
1. Maintenance Requirements are based on Water by Designs, Maintaining Vegetated Stormwater Assets (2012) and Rectifying Vegetated Stormwater Assets (2012). Refer to these documents for further details.
2. Refer to latest version of HumeGard Maintenance Guide for details of inspection and maintenance procedures.
Page 59
WATER QUALITY CONTROL POND INSPECTION & MAINTENANCE CHECKLIST Stormwater Quality Improvement Device: Date: Location: Date of last Rainfall: Inspector: Weather Conditions: Time taken to complete inspection / Photos taken (Y/N) maintenance Addition Information Photos of Site (Explanatory Notes): 1. 2. 3. 4. 5. 6. General Comments and Sketches Officers Signature: Note: Maintenance details have been adopted from Water By Design’s Maintaining Vegetated Stormwater Assets – Version 1 (2012). Refer to this document for further details Performance indicators and monitoring triggers outlined in this document are subject to latest specifications provided in peer reviewed journal publications and health regulations. Updates are to be made where appropriate.
Page 60
Condition Maintenance
What to look for Performance Indicator (PI)^ Additional Work Needed
Rating* undertaken**
SURROUNDS
Damaged or removed structures No damage that poses a risk to public safety or
(e.g. traffic bollards) structural integrity
INLET
Inlet is structurally sound and there is no
Erosion
evidence of erosion or subsidence/settlement
Damaged or Removed Structures No damage that poses a risk to public safety or
(e.g. pit lids or grates) structural integrity
Sediment, Litter or Debris No blockage
BATTER SLOPES AND BASE INVERT
Minor erosion only that does not pose a risk to
Erosion public safety or structural integrity and would
not worsen if left unattended
No surface depressions or mounds > 100mm
Depressions or mounds
No isolated pools/depressions that could
Isolated pools of water
provide mosquito habitat
Litter Maximum 1 piece of litter per 4m2
Unusual Odours, Colours or Substances
None detected
(e.g. oil and grease)
Accumulated Sediment1 No visible coarse sediment accumulated
*1 – PI met; 2 – PI met after maintenance activity; 3 – Additional maintenance needed; 4 – Rectification may be needed; NI – not inspected; NA – not applicable
**Quantify where possible e.g. amount of sediment or litter removed
1
Monitor the rate of accumulation by checking sediment levels at least once per year. This may involve establishing one or more reference points within different zones of the WQCP. Where sediment depths are greater than
150mm, a bathymetric survey of the WQCP may be required to determine the full extent of accumulation
2
Appendix B of WBD’s Maintaining Vegetated Stormwater Assets (2012) provides details of common weed species. Both declared and environmental/nuisance weeds are incorporated into this list
3
Application of fertiliser in upstream catchment to be scheduled and measured to maximise nutrient uptake by plants and avoid runoff to WQCP.
^Performance indicators and monitoring triggers outlined in this document are subject to latest specifications provided in peer reviewed journal publications and health regulations. Changes are to be made where appropriate.
Page 61
Condition Maintenance
What to look for Performance Indicator (PI)^ Additional Work Needed
Rating* undertaken**
During dry conditions, the water level is not
Water levels more than 0.3m below the normal operating
level
Minimum 80% vegetation cover on batters and
in water up to 300mm deep (higher if the
vegetation provides a public‐safety exclusion
Vegetation role)
Average plant height > 500mm
Plants are healthy and free from significant
disease.
No declared weeds present (or declared weeds
Weeds2 are controlled)
(emergent, floating or submerged)
Maximum 10% cover of weeds
Maximum 10% cover of algal mats on two
Algal Mats
consecutive inspections
Mosquitoes 1 larvae per 2 ladle dips (300mL ladle)
Fertiliser3 No presence of fertiliser on banks of WQCP
Water is clear, that is turbidity is such that the
floor of the pond can be seen at 0.75m depth
No visible algal blooms
Cyanobacterial Blooms
Macrophyte coverage to be above 20% of the
WQCP water surface.
Plants are healthy and are free from significant
disease
*1 – PI met; 2 – PI met after maintenance activity; 3 – Additional maintenance needed; 4 – Rectification may be needed; NI – not inspected; NA – not applicable
**Quantify where possible e.g. amount of sediment or litter removed
1
Monitor the rate of accumulation by checking sediment levels at least once per year. This may involve establishing one or more reference points within different zones of the WQCP. Where sediment depths are greater than
150mm, a bathymetric survey of the WQCP may be required to determine the full extent of accumulation
2
Appendix B of WBD’s Maintaining Vegetated Stormwater Assets (2012) provides details of common weed species. Both declared and environmental/nuisance weeds are incorporated into this list
3
Application of fertiliser in upstream catchment to be scheduled and measured to maximise nutrient uptake by plants and avoid runoff to WQCP.
^Performance indicators and monitoring triggers outlined in this document are subject to latest specifications provided in peer reviewed journal publications and health regulations. Changes are to be made where appropriate.
Page 62
Condition Maintenance
What to look for Performance Indicator (PI)^ Additional Work Needed
Rating* undertaken**
If above indicators for cyanobacterial blooms
reveals non‐performance, water quality testing
is required. Performance indicator is
≤500cells/mL of Microcystis aeruginosa or
biovolume equivalent ≤0.04mm3/mL combined
total of cyanobacteria.
OUTLET (RISER OVERFLOW WEIR, PIPE OR OUTFALL)
Outlet is structurally sound and there Is no
Erosion
evidence of erosion or subsidence/settlement
Damaged or removed structures No damage that poses a risk to public safety or
(e.g. pit lids or grates) structural integrity
Sediment, litter or debris No blockage
No downstream impediments to the release of
water, no erosion or damage to the outfall
Downstream Outfall
structure and no evidence of malfunction (e.g.
excessive sediment accumulated)
*1 – PI met; 2 – PI met after maintenance activity; 3 – Additional maintenance needed; 4 – Rectification may be needed; NI – not inspected; NA – not applicable
**Quantify where possible e.g. amount of sediment or litter removed
1
Monitor the rate of accumulation by checking sediment levels at least once per year. This may involve establishing one or more reference points within different zones of the WQCP. Where sediment depths are greater than
150mm, a bathymetric survey of the WQCP may be required to determine the full extent of accumulation
2
Appendix B of WBD’s Maintaining Vegetated Stormwater Assets (2012) provides details of common weed species. Both declared and environmental/nuisance weeds are incorporated into this list
3
Application of fertiliser in upstream catchment to be scheduled and measured to maximise nutrient uptake by plants and avoid runoff to WQCP.
^Performance indicators and monitoring triggers outlined in this document are subject to latest specifications provided in peer reviewed journal publications and health regulations. Changes are to be made where appropriate.
Page 63
“azeijsqns ajesjauad Ajysea ued S}00 Jay} UBYM 4Saq MOJB sjUe]d 1a}eM se BAW JUBLIPAs Bul Np }}0s Buly2edWOD ploAy :830Ky “BAIE MO}J BY} BSeSDU} 0} Pasaye aq 0} paau Aew uIseq JUAWIPAS 34} 4O UO]}eINBIJUOd Jo azIs ay} ‘a}qissod you Ss} S14} J] 'S}442q Se Yons ‘sediAap uo}Jedissip ABsaua paau Aew ujseq JUaLUIpas ay} UIYPIM S/t S'O< Jo SAl}]90]aA BAIssaaxy - “yE uoI}2a5 Ul 2]Ge} UIseg JUSWIPAS ay} 0} Jajay ‘UIseq JUaWIpas BuNSIxa ay} JO Wea.ysdn paplAosd ainysnJyse.ju) ainydes juawpas Jeuol}1ppe Uo paseq Jo speo] juaupas pajzadxa uo paseq pagiejua aq 0} paau Aew uiseq yuaupas ay} ‘uIseq juawipas BY} LIYIM a]qe}eAe S} ALUNJOA aBesOYs JUaIIyyNSUI J] ~ “pue}jzam ay} yo ued Siu} UB\sapa. ‘sseddgq mo}j-YBIy 10 puod ajuN Us} aJaYy J] - “UO}}E}}1S AY} Jo asned BY} 034! UO!JeBISaAu} Ue Aq pauedu0d3e aq sAempe Pinoys duoz ayAydos3ew ay} WOdY 4115 payejnuNdIe BuIADWAY :3}0\ ‘JeAowia 31S sod pajue;dsue.y pue sysom-aid paysaasey 8q ued syuejd 132M Auepy ‘paysijqe}sa-ai pue paaowas 8q 0} uo}}e}839A 3y} a.inbas Aew auoz ayAydosew ayy WoJj IIs BuyAoWayY “auOz ayAydossew ay} Woy 31S BAOWAL ‘ww OSL ueY} ow Aq paseaiou) Suiaq pag auoz ayAydossew pue}}9M ay} Jo 743}ay 343 UW) payjnsal sey ys pazeynuundde 4 - “parca. s} Wa|qoid ay} Jo adunos ayy 92uo Ajpidei saao3a. )M sa}Aydoi2ew pasewep ay} ‘sased }sow uj ‘sajAydosew paBewep jo seaie aie} ysyqejsa-ay - “SPIq Pda} 0} JOU S10})\5}A aBeINODUA 0} aBeUBIs asp) “"YSiJ Jo UoW}ejndod ay} aonpal Jo aAoway - ‘aw)} Buipaaig Bulinp pue asojaq Jaa] 487m 34) Bu)ddoup Aq ease ay} anva] 0} suay dwems aBesnosuy - “Spiig }}N3.10 aAoWAaY - “UO}}2}9BAA BA}}!SUAS 0} $SAdIe P1ig aInpas 0} BuIyjauasy, - suondo (uiseq quapas ayy ysnosy $812}90]8A MO}j JaYBIY pue ‘SBWNIOA Jyouns 1a}eMUWI0}S 493203 ‘speo} JUaWIpas 43}€98 a}ea19 Aew eale padojaaap 843 u! asea. ou) ue pue Sa}31A139e JuaUdojanap) SN pue] }U9sIND puke aZIs }UBWYI}e9 ay} WyUOD pazis Ajayenbape s) 11am ssedAq Mo}j-yBly ay} FeYy yI9YD - s/w S'0 paaaxa jou op ulseq JUaIpas ay} YBnoIUy) SMo}J WNWIXeW ay} Jey} 49949 - Suizis useq juaunpas yDayD - :wa)qoid ay} jeada Jou op syday2 asayy 4} “papadun Jo pays0\q jou Ss} am ssedAq Mo}J-YBiy $,8U0Z Ja}UI AY} JY} YaYD “uiseq JuaWpas 34} U) J9Aa) 137eM ay} Jo ydap au} Mo}aq a1}aW au jsea} }€ @q Pjnoys ]aAa] @Be10}s yuauNpas ay} Jo doy ayy “puod yay BY} UIYIM ajqeyjere s} ydap aBeso}s yualryyns Jey) 4394) “ssedAq mo}j-Y3iy pue puod ja]U) Ue UO adUasaid ay} 410} 43ay4> sque|d pa}ooJdn aaey died asaym seaie Ba ‘pare|dsip Ajjea)sAyd uaaq sey u0}e}aBaA ay} aJayM sease - Saul] YJEM Woy paydwesy AjjerisAyd uaag aaey sayAydossew asaym ZW S< Seale ‘B'a ‘Buyjsau Jo ‘Buydwery ‘BurzesB anisuayxe yo aduapiaa - sligap a}Aydos.ew Buneo}J Jo sjuNoWwe aBse] - ‘BuIpnjoul ‘u0]}2}883A pue}}am 0} aewep snojAgo jo suBis 104 49ay>, suope3}3seAu] (puod yaju)) auozyaju ou - auoz ayAydoisew ay} | 07) paseajas aq 0} sjuaw)pas | 40 sjunowe a38ie) Buisned ‘(puod }8]U}) 8U0Z Ja] AY} UW) aN}Ey - ANP uoeyS — “uo}}e}aBaA | ay} peBewep aaey ‘died pue sp.ig Jaye Buypnjsuy ‘euney ainpey yueyg Sesne ayq}ss0q we}qoig Spue}39M po}anySuU0 Aya, 0} MOY UO BoUePIND F 91qe,, Rectifying Vegetated Stormwater Assets - Draft WOterbydesign 43
Page 64
“SMOY Bulssadsip Ul }sIsse ue (SaU0}s Buddays ay) Wayy Uaamjaq sazeds YIM parejd sy0, 40 Sul] Mo] 2 “Ja}ewW ay} aAjosa, 0} ayenbapeul $1) U01}2}a8aA pue yyed Moy jelUaJajaid e Si Jay} J] “sauyjapiny Juawysy}qo}sz Pub U0}}9N13SUO> BY} YPM adUepsOIIe U! pue}aM ayy Jue|day Uo}}Ng)YSIP UaAa Ue U]E}qO 0} ynoAe] Buyjueyd ayy Ajpow ‘yjed MOY 84} 0} Je]ND!puadiad pue uada jou s} UO!}e}aBaA ysnqou J| “AYDO|aA yBiy Jo seaie U) pared aq ued U0!}2a}01d yD0y ‘paBuejua pueyaM ay} Ul] ayyo4d MOL }eUo1}9aS-Ss09 ay} JO pa}ais}se1 aq 0} P3au |}!M MO}JUI BY} U3} ‘S/W S'O< ae PUe}}aM UIYIIM SMO, Pue paz}s-sapun Ss] pue}}aM ay} Jo a}O1d }euo!}3aS-Ss019 ay} J} “au0z 8}Aydos2eW ay} 0} ease Ja}U! ayy Je Ja]eM Jo Jood Jadaap e 389 J0 'u0}]98}01d UOIso4a se Yyons ‘ainjansys uonjedissip Adjaua ue WYyONaL 'S/L G'O< S} A}190)A J3]U] BY} J ‘jauueyp sseddqe 8unj9N1ysu0D Aq pue)jam ayy punoue smoy yBiy ya.Ipa. ‘ajqissod aay "yue18}0} apeys aie Jey} saidads yue|g “Bulpeys aonpay suondg "]GE} S14} UN JaAdT] Ja}eM, 0} Jayay “a]Ge} S14} UI JaAa7 JaTe/Y, 0} 1ayay ‘pue}}aM ynoysnosyy uada si Burjue|d @unsuy “sUO},JaJIp pue swayed Moy jeWajul ay) a2UaNyUI ued S14 ‘sayAydo.new BuiBsawa yo uoNquasip Aydzed si say) J] '58}A4dosew ayy Jo yNO-33s pue UOIINqLYSIP ay} 4294 “YBiy 00} ase S|1y190]aA Buy uay} ‘S/W S'0 < 31e pue}}aM a4} UIYIM SaI}90]aA WNWIXxe ayy 4[ Pue}IaM ay} Jo (Bate Mo}J) a}yo.d yeUOIWDas SSO19 ay} YDBY} “aUOZ JayU! aA}Ydos9eW ayy Ul pasn poyzew Uoedissip ABJaua ay} y9Y) “SAl}190}8A Ja]Ul - WINWIXeLW 84} 83e)/N3|e7) ‘pue}}aM a4} Jo UBIsap JajUl ay} 4a4>, “Aep ay} Jo sow - 40} syue}d Ja3em ay} Jo sow Buiydeas s) yyB}JuNs yyy yay> Su0}}23)}SeAu] i “spoliad jjejures +» U3BM}Aq U} ]8Aa] 187M jEWOU ayy » BAoge AjjUa}sISUOd S) }aAa] 1a}eM ayy i asnedaq Bulumoup ase syueyd ayy “spojad yjeyuies | U3—aM}aq UI Aa] 18}eM jeWOU ay | Mo}aq Ajjua}s}sUO) S) }aAa] 1a}eM ayy / asnedaq jno BulAp aue syuejd ayy pue]}aM ay} WY} paysi|qe}sa sey yjed moy jenuasajaide - puod a] UI BY} Woy auOZ a}AydoseW ay} Buiajua ase MOL 2812} 31aym yBly aq AeW S31}190]aA ]290) - pue}}aM ay) y8noiy} Buissed Je SMOLJ JayB1y ye pue jauUeYD ssediq moy-ysiy ou si aay) - :asnedaq painoas Bulag s} uol}e}aBan puejayy “uns })Ng. YIM sq MO13 spue)}aM pa}anJysu0d u! pasn sjuejd Ja}em ysopy “yoeqqe Jasul pue aseasip 0} Ajijiqidaasns Buiseasdu} pue unoBiA pue y}Moi3 Bulsnpa. si apeys sesne> 9)q)SS0q wia}qoig 44 weaterDUdesian rectifying Vegetated Stormwater Assets - Draft
Page 65
“paso}UOW ag 0} paau jim yoIyM ‘spue]}am ys}y2e1g/auyjes u) S20jinbsow Jo ys11 paseasoul ue $} 2494 "saldads Jue}d yue18]0} ysPyoeIg Jo aUN]es YIM pue}}aM ay} jue|dai 0} Asessazau aq Aew }] uay} ‘UoIsnJjU) J8}OM aUnjes WOY pue}JaM 34} 93e]0S) 0} ajqissod yous} }1 4) - “adey20)q 0} Ayjiqudaasns pue suiyijorg 3unysns2ua yo dn pying JUE}SUOD 34} 0} ANP adUeUaIUIEW Jo jada} ysIY e sasinbas S}USWUOJAUA BUT]es UIY}M Sa}e8 de} Jo asn ay] :3}0N “juaWuoL|AUa aujes Weatj}sSUMOp a4} 0} adid 38)3N0 ay} UO a3e8 de} e Buyj}e}Su| ‘aWIBas D1BojospAy pasayye 34} 0} 89UeI9]0} 434} pue ‘pue}}aMm ayy UIYPM JUasaid saidads jue} ay} 0} uaals aq 0} paau osje }}]M uol}eJapisuo> 34049494} pue ‘syue}d ay} yo yeay ayy edu AyjeUa}od AeW ue} aM BY} LIYIM JaAa} J9}eM 34y BuISIeY :3}0N, *81NJIN.Ys 3}3NO dy} Jo UO}}e1NBijU0d ay} BulA|pow @uinbas |]IM S14] "}8}3NO Jasy ay} Y8noyy aqua JouUeD 4a}eM |UN]ES JEU} OS PUE}JAM dy} UIYPM Jaa] Ja}eM ay} Buisiey » :Japisuod ‘PUe}JaM AY} OJ) BuIJa}eEMyIeq ]epI} W41yUOD BuyJo}UOW Ayuijes pue sjuana api} a81e) Bulinp suoljedsasqo 4] - ‘payiey sey Buque|d pueyjam BY} 4O BIO JO %OS Ajayewxosdde asaya Ajuo yng ’(jana] 48} 2M 84} JAMO} 10 as}e1“3'1) BUNSas DIBO}OIpAy ayy ysnipy - “spoyjau Buyue}da. Joj saujaping yuawysi}qo3S3J pub uo}IN.ySUO> BY} 0} Jajay ‘saidads ayersdosdde yym squejd arejday - “(ww OO€ Ajqesajaid ‘ww O0Z WnW}UNL) Yydap jios 338109 yy ayyoud-a pue pueyam ayy uieiq - suondo “waysds aBeuleip SuiAiara ay} u) Se }}aM Se ‘(a)3N0 pue ‘a|ppiwi “JayU)) pueT|aM BU? U} SUOI}eI0) aasy} Jo WINWIUIW e je INd30 Pjnoys BusojUo ‘Apes UI saBUeYD arsasqo 0} spolsad Ap uo} Suiinp pue ules 43342 YO BuopUoWw Apes aye}Japuy] “pue}aM ay} O}U) Bu}JayeMy2eq S} MO}J J] BAJaSqo 0} squad ]epi} aB1e) Buln anyan.ys 3a)ynNo ayy yIadsu| ‘ayetidoidde aJe UB|sap pue}}aM AY} U} PapuaLULOdas saldads ayy yey) 4994 "sau0z yy dap 3981109 ay} U) pajueyd uaag aaey ‘UBIsap pue}}aM ay} 0} Buyp4092e ‘sa}dads JUe}d 33a.109 ay} JeYy 4294 “WW S| aq pynoys Yydap wnwuny) ‘BuyJ09 ny)s-u) Bupjeyiapun Jo pue}jam ayy Bujujesp sayyia Aq ane, yuejd yo seaie ui yydap jjosdo} y9ay> $U0}323)}SeAU] “pue}JaM 34} OJU) Burpnszuy Ajjepyy s} 4ayeM auyjes “ajqeynsun ase saidads jueyd ay) “yydap quaiyynsul 4o Ayyenb 100d jo si posdoy ayy sesned e}q)Ss0q wia}qoid 45 Rectifying Vegetated Stormwater Assets - Draft waterbyde
Page 66
“adiape ysyjeivads yaas *SNOS }24)NS pldy BuyAjoau) juawdojanag BulBeuey pue Buuuejgq 20/Z Arjog Buiuue}g 8323S YPM aduepso3ze UI paiedaid aq P}noys uejd uawaZeuew ajeyjns pide ue ‘Buiyrea} ayeyjns pve 0} Dal[qns s} pue}jam ay} Jo uasad ase sjos ayeyINs pire 4] “ad\ape Buyjuejdai Joy sauaping yuawys!}qD}sq pud uo}2IN.ysuOD 34} 0} Jajay “JUe}daJ pue j1osdo} payeujwejuod Aue are}de1 ‘panjosa. Uaaq sey anss} ssai8u) Ja}eMpuNo!. ay} UaYAA, “a})S UO}SNJ7U) J8}eMpUNOIS ay} SsosDe Ja}4eq a}1Uo}Uaq 4o Ae}2 e a3e)d pue 1a}}eq pue}jam ayy Buoje youaiy ‘paso}}UOW aq 0} paau jim YdIYM ‘spue)}aM yshdeI1g /auyjes u! saoyinbsow jo ¥s)1 paseaiou! ue s} aay) ‘salsads yue}d yUe18]0} ys}yDe1g Jo aUN]eS YM pue}JaM ay} que|day “sauy) pueyam ay} sedau Jo a3e)dau ‘snoaqo aie Yy]}eay U0I}e}9BAA UO spedw) pue pue}}aM ay} U} S) UOISNJ}UI Jay}eMpuNoB aUNes 4] suoydo ‘payzadsns 5) uo}yeuWeyUOD JUAWIPas 41 ad1Ape ysyjeldads yaas “anjey Jue|d 0} BuIynqiqyUOD - $1 UO}JEUILUEILOD JUBWIPAS 41 AUIWIA}AP 0} YNDYJIp AJaA S11] “S}lOs a]24)Ns pide Jo aduasaid ayy WUYUO) 0} J8PJO U} pue}}aM al WO. sajdwes jos yo sisAjeue A10}240q2) apn}du! pjnoys uoI}eB}ySaAw jed1UyIa}088 ay | “Pue}}oM 3} UlypM JUAaSaJd s}jOs a}ey)/NS pide Jo adUApIAa S} 3184} 10g MO}aq S) Hd 483M ay} 41 Js}]e}9ads jer}UYyd9}0aB e WO.y arIApe yaaS “quasaid s) sajem D1PIDe JaYJBYM au] W4azap 0} pueyaM Uy Hd JayeM aunsea| (@8u)} uaaJ8 Jo anjqe yy) JayeM Jea]9 - yyeay yuejd stood yo sease - (un)s8} pjay asinbas im) oy > Hd os - a]Youd jlos ay} U BuyyZ0W pai so/pue mo}jaA - sapnjaui Aew siy| - | “S}}OS 8}24]NS pide yo aduapIAa JOY pue}aM ay} JO SUIBIeEW 499Y>) ‘uol}e}a3—aA pue}}aMm Jo Yr]}eay ayy 0} 1}eWa|qGo1d 8g 03 Ajayyjun s} (w3/SW OOSL>) Anules Mo] Jo UOISNjUN BY) “ssarod siy} ym ysisse 0} payinbal aq jm ysyjeldads Jayempunols y wayempunos3 MO}}EYS ue Puke} aM ay} UdaMjag A}JAI}INpUOD pue Bulmo} S} Ja}eMpunos8 ayy AeM ayy MOYs UeD BULoO}UOW siy “BUNN} JBAO S]aAa] Ja}eM 4921} ue asedwWod 0} pue}}aM ay} 0} uade[pe sjjam BuLio}UOW Mo}jeys BuI}]e3SU) apN|ruy Aew siy ‘Alp Jo spowad Sujinp pue ures Jajye Ajaze)pawu Ayuijes aujwsazap 0} 3u)3Sa} Ajjenb sajem ayeqJapuy) ‘uoysnsqur 4ayempunois 0} Juaze[pe y2eqQaIp 10 Buiysea)q azAydosew pas)|e30) pue ‘sease ssasBu) Ja}empuno3 0} uarefpe YyMo48 jeje snojuawey)s e21]Ua}0d ‘splos papuadsns - | $0. UO}}e}NI30}} pasea4su} 0} anp 13}eM Jea}D Jo SeaIe JOJ YOO] suopeBysonuy ‘payeujwezuod Ss) JUaWIpas ay | “pue}}aM ay} UIYNM S}10s 8} 24)Ns pide Jo aunsodxa 24} 0) anp ]d Mo] e sey Ja}eM ay “pue}}aM ay} OU) Su)ssaJBu) s} Ja}eMpUNOI aUN]eS sosneo e)q)sS0q wra}qoid Rectifying Vegetated Stormwater Assets - Draft e
Page 67
“Uo}]e}aB—a ayy ysiqeysa-aJ pue ‘An auuAyjeg puejjam ay} AJ1}9a4 ‘Uo}}e]aBaA Bulysixe Aue a}e30)41 AjiJesodiwa} 10 aAOWA ‘pue}aM ayy.UIeIq - (passayaid) pueyjam ay} ul jada] 49}eM jeWJOU YJ AS}2J 0} SAiNI9NIS ]O4}UOI D}]NesPAY ayy asNnByuoIIy - “(wo Ajjesid Ay) yydap uoljuajap papuayxa ay} aAsasaid 0} paiay]e aq 0} paau Aew sam ssedAq Moy-YsIy 84} 40 }9A9] 94} UAL} ‘apeW aie Ja}INO a4} 0} SuOI}eIYyIpow 4] - “3.4NJINJ}S }8]INO a}OyM. 34} 8u)AyIpow Jo (pa.ieyad) AjUO suo}}eJojJad Jasid 1a]3N0 ay} Buyysnfpe anjoau Aew Siy | ‘Pue}JaM ay} U) JaAa} Ja}eM jeWOU BY} AS1e4 0} S8iN}INJYs MO|JINO JO MO}JU! PUe}aM anByUoI-ay - ‘uo}}a]as saidads yueyd pue uo}}e8i}1W aSewep }Dasui pue aseasip BuipseBai auepins AplAoid ued 4s1}e4NyNd19.10y e ‘ajeIs-aB.e] S} SSO] UOIJEJaBAA J] ~ "quaw}ea} ]NOYM 48A03a 0} pa}adxa aq UPD UOI}e}aB—aA ay} ‘SASEI}sOW UY - suondo (uo1e3a8aA yioddns 0} J2A9] 4832 jewou je daap W ‘9 WNu}xew) auoz a}AydosseW 34} Yy8n0143 syidap paiisap ay} saypyew pue sauyjapin5, uBisag }O2!1UY2a] a4} YYM yUaYs|SUO) S! UBIsap ay} BulWIyUOD - ww 0S + 0} UZisap ay} saysyew AjawAyjeg ay) BuIWIYUOD - Aadains pay2n4jsu0s-se ayy Buluie}go - :3.4)Nba ]}IM SY | "33109 S} UBIsap Jenyde ay pue sara} 334109 34} 0} pa}2N43SUo3 uaa sey ANaWAYZeg pue}aM ayy Ayla, (uo17e3aBan yoddns 0} jana} 4a}eM }eWJOU 32 Ydap WS'9 WintuIxewW) auoZ ayAydosdewW ayy y8no.iy3 syydap passap ay} sayojzew }) ey) pue saujapin5 uB}saq }D2}Uy2aJ AU} Y}M JUa}s!SUOD S} UBIsap ay) BuWYyUOD - suo}}eJosJad Jasi1 ay} Suipn}aut ‘sainyon4ys aynespAy ay3 je Jo Adauns payanjsuod-se ayy Buluie}go - sazinba. }M sty] ‘pajons}suod pue painByuos Ajayeldoidde 812 pue|}aM a4} JO $9N}INJJs MOYYINO pue MOY ayy JEU} ALAA, ‘skemyjed podsue.3-se uy Juauidojanap snjje3 40 ‘sajoy asoq 3asul ‘aduadsauas ainjewa.d Aq pajsajiuew uayo si adewep Dasyy ‘sa}Aydes9ew U) UOWWODUN OS)e s} aBewWepP }DaSU| ‘wa)}qoid ay} aq Aew aseasip yuejd ‘paiojdxe uaaq aney sasne> Jayjo }je Uayfy"}SNJ 0} ajqyy}daasns S] YDIYM ‘sNpI}DA sN}3Ia}douaoyrs se yoNs sue} UyeyJ89 Ul N30 ued } JaAaMoH ‘s2}Aydo.49ew Ui UOWLWODUN Ss} aseasip JUe}G $u01723))SaAu] “U01}9N1}SUOd JO UBISAp 328.103} Jo }nSa.e se (BUOIM 212 s}aAa} Jo syydap) 3381409 Jou Ss) pue}}aM ay} jo AjawAyzeq ayy “uo}}9nJ]suod 40 uBIS@p 3321403U) 0} anp (Mo) 00} °3'1) }@A3] BUIM ay} Ie ale Sasi pajeioosse pue ja}yno pueyam ayy "$}9asu! WO.y paBewep Jo paseasip aie squejd ay ‘sasne 2}q)5S0q (no BuyAup s} 40) J9]M eWIOU ay} Mojaq AjjUa}s1su0d S} ]8Aa} JIE, wa}qoig 47 Rectifying Vegetated Stormwater Assets - Draft Wwaterbude:
Page 68
"]PAa] J8}2M ]eWOU Mojaq SAIe4INS Je 1aAO ios Ae}D e jo uoijea)|dde a.inbas Aew pueyjam ay} aul] ous) asayy aleyyA - “saBe}s Uy Jeu] pueyam ay 3MysuODaI ‘AjaAljeusayy - “wa)qo.d ay} aajos sAem|e JOU }}IM yreoidde siy | ‘aBexI0\q J9]U! ay} BAOWAY “yed} BY} eas AeW pue ati} JaAd a])Vas |]IM a}UOJUA ay “auNyXIW Ae} ayuoquag e Ajddy ‘pue}jam ay} UMop MeJp pue sMoL} JUBWYI}ED WO } 8}2]0S] 0} pue}aM ay} 0} Ja]UI BY} YOO] ‘paxy 3q 0} paau }}M 429} ay} ‘aWaYIS BuysaAsey 1a}eMULO}S yo yed s} 3) 4) B'3 a}eM pjoy sn puejaMm ayy asayyA - “suo]}}puod Ap pue aM y}0q BAIAINS UD }eY} Sa}Dads Jay}O YPM paque|d aq 0} paau Aew pue]jam ay) ‘puejjam jerawayda ue se ya} aq ued p) ‘Ayyenb 483M aA0idu 0} Ss} pue}}aM ay} Jo asodind Ajuo ayy aay, - ‘(adid punose wt 99S Ajje21dA3) sseyjo3 aBedaas }je}su) so weday - “sainyanijs pazis Ajaye.idosdde yr (ss}am ‘sacid) saunyanays 38]U] pualwe Jo a3e}daJ ‘ews 00} s! }O1}UOS Ja]UI ayy J} - (@WI} UO},UBJaP) }0.13U03 D})NeIpAY pue ‘AuyjawAyjeq ‘ease adejins ay} Buliapisuo pue}jam 84} UBIsap-a4 ‘]UaLUYD}e9 $}) J0y pazis-s8A0 Si pue|aM ayy 4] - “wjam e Bu1}snfpea se yans ‘syJom Jofew 404 ysi]e19ads e YPM })NSUO? ‘pUue}IaM aU} OJUI SMOL MO}]e 0} uo}}esNBYyUO> ay} AjIPOW! Jo y90)quN UaY} (aiNyoNJYs UOISJAAIP ‘B'a) waysAs aBeuresp weas}sdn ay} u) Uo!}2143S9 eS) B194) J] - suopdo y]82 Jey} UIYIM aBeweP Jauy aq Ae a1ay} ‘s}}92 Jayjo ayy uey} Ajpides ssow sdoup 5]}83 asay3 Jo auO UT |aAa] 18}eM a4} J] 1182 yee WYHM S]_aAa} J8}eM JOWUOP ‘spung yea pajeas Buisn s}]@9 $0 sajias e OU) auOZ ayAYdos3eW ayy yds ‘AjaAeUayY “JaU}) PUETAM AY} WO. Bu)ye9] s) 19}eM J) UILWIAap 0} Ule Jaye syaam Jo JaquINU e Joy pueyyam LYM S]aAa] JOUO/| “Buyyea) ag Aew Jauy ay} ‘wa)qord J2A9] 48}eM BY} Ay}Uap} 0} ley SUOI]EB!}SAAU) Jay}O }]e Jf ‘yempeay Jo adid ey} Jo UIBseW ayy punoie aBedaas Jo Moy 40 suBis Aue aAJasqo 0} Wes Jaye 3a]]NO adhd pue}jam ayy yay) “pue}}aM ay} JU) MOY aduUauNIa aBesaAe JeaA-1 ayy 0} dn mojje 03 pazis Aja}e1doudde aie sainjanijs Jaju) ay} 3eyy pue ugisap Jad se pa}3n.ysu02 uaaq sey pueyaM ay} Jey} ALAA, “JUBWWYD729 BY} 104 paz|sJaao ag Aew pue}jam ay} Uay} ‘28Je ]UBWYI}L BY} JO % UEY} aJOWW S} PUE}}aM ayy 4] “eae auoz ayAydos2ew ay} 0} pasediuod ease yUaLUYy>}e9 ayy 423y) ‘pue}jam au} Buiiajua ase smoy pue Bujesado ase Aayy dunsua 0} Buju}ed s) }] UaYM Sa.injINJ}s UOISsJaAIp Aue yadsu| “Buyy]Y. Ss} pueyam ayy pue AyAesB Japun pue}jam ay} BujJajua ae SMOY ainsua 0} BUIUIEI $1} UayM waysAs adeulesp Ja} eMWO}s Wea.ysdn pue pue}aM ay} adsuj suo}3e3),SeAu] (Apues) Suiujeip aa1j 00} aq Aew add} los ay} saul) ou $s) aay} 4] “sasso} Ja}em U} BuyjNsal paewep uaagq sey Jo Aj}3a109Ur pa}onJjsuod sem Jaul) pueyjam ay) ‘(s}8)]n0 adid ay} yo apisyno Jo Jayaujiad ay} PIA pue}}aM Woy BuIye9} S) 1a}eM. ‘a'l) payey arey s}a)1N0 adid pueyam 3y} punoie $1e}}09 a8edaas ay) parowas JaAaU SEM U0}}9N}suO2 BuLINp pajjeisui sem jey} aBer20)q Auesodwia} e asnedaq pueyjam ayy sasseddq mo}, ‘8'a ‘pueyjam ay} 0} SujBseydsip Jou s} uawys}e9 ay} - juayd}e9 $31 0} paiediuos PAZISIBAO S} pueTaM ayy} - pue}jaM ay} Sulaqua 472M JO BLUN}OA ay} BUN}D1)Sa1 pue jJeWs 00} S} pue}jam 34} 0} Ja]U) BY} 2103194} pue (payewnjsa-sapun) pazejnajeasiws uaaq sey MOYu) UBIsap ayy - :0} ANP MO|J JO UO}7.0d jes e AjUIO Jo smoOY BU)A1898 JOU S} PUE}JAM BY | sasned 0}q)5S0q wa}qoig SIGN Rectifying Vegetated Stormwater Assets - Draft yde
Page 69
“(J@Aa] 483M eULIOU Je yap
W S'0> AjjenidA) squeyd pueyjam oddns ued yydap Jezem ayy
aunsua 03 AsjawAyzeq ay} 0} JUaLUysn{pe Le ainbas Aew sy]
“8.1N}IN4}s 39}]NO ay} BuiBueys Aq puejjam ay} Jo jada] Ja}em
34} as}e1 ‘WaysAs BuJAlaIa/ BU] 0} aBeUIEIpP aay auNsUa Oo] -
‘(paiuajaid) puejam aur
40 ]@Aa] 187eM jeLWJOU paiajaid ay) Mojaq 0} LWa}sAs aBeuleIp
Su)Aja3aJ 84} U} |aAd] J8}eM 34) adnpa 07 sudo azeBiysanu] -
“(wS'0 AyjeridAy) uydap uonuajap papuayxa
34) aAsasaid 0} paiaye aq 0} paau Aew sam ssedAq moy-YBIy
BY} JO }2Aa) BY} Udy} ‘ApeW aie Ja}JNO ay} 0} SUOI}edYIpow 4} -
“2.IN}2NJ}s 38)]NO a}OyM
84} Bu)Aj pow Jo (pa.iajaud) AjUo Suo},e40y4ad Jasi 38)]NO ayy
Buysnfpe anjonul Aew siy | ‘pueyjaM ayy u) Jara} JayeM }eWOU
BY} AS}Ed 0} $9IN}INJYS MOLINO JO MO}JU) PUE}JaM aINByUOI-ay -
“ sauljaping ubisag joD!uy3ay ay} Jad
Se }3}]NO 4} UB\sapas ‘aBeyD0}q Jo YSI4 auNyNy ay} aseasDap oO] -
“waysds aseuesp ay} Woy aBeyI0)q 10 UOI}EI}Is aADWAY -
‘Ajse)nBa y2adsul pue 4as14}a}3No ayy. uea|D -
suoydo
“pasinbad ag osye Aew ‘siasis ay} Suypnyjaul ‘waysds
38}]N0 pue}j}aM ay} Jo AaAins payon1jsuo0d-se ay} BuIyjnsuo>,
“waysds aSeuiesp Bulalada. pue pue}aM ay} uiyyM pasinbal
ag Aew Aaauns |a Aa] 18] 2M e ‘pue}}aM aly Ul S]aAa] 1a}eM
Buy}e1p s} waysds aBeulesp ay} ul }aAa] 1a}eM ay} J] WaISAS
aBeuieip Bualada, ay} u! s]ana] 48}eM payeAaja Joy yay>
(uorje}aBaa ysoddns 0} aaa}
4a}em jewsou Je yldap Wi S‘9 WinuIxew) auoz a}Aydoszew ayy
y8no.y3 sydap passap ay) says}zew } yey) pue sauyjapino
uBisag jo2}UYIa) By} YM JUa}s!SUOD Si UBISsap ayy BuIWYUOD -
Wu Gz + 0 UBIsap ay} sayszeWw AsjaWAYjeg ay} BUIWYUOD -
suo}eJojiad Jas) ay} Zuipnjsut ‘sainyaniys
ayneupAy ay} |e Jo AdAuns payon4}su03-se ayy Buluie}qo -
‘auinba j}1M S1y] 7pa}2N4}suo> pue paunByuod Ajayeridoidde
812 PUR}IAM ay} JO SEiN}INI}s MOYINO pue MOYU! ayy JeYy APA,
‘adid ayy dn Buy183emy9eq Busnes 5) ey} aBeyD0}q 10
UO}}e}/IS BAlSsa2xa Joy Wa}sAs aBeulewp wWeas}SuMOp ay} 4394)
“sLigap Buj}e0))
0} }8]3N0 ay} pasodxa sey uBisap Jood e JayyayM Auap|
su0}}23)}SAu]
‘(uoseas
8M ayy BuLNp WaysAs BulAIa3a ayy
U) $]8Aa] 18}eM pastes Joy Moye Jou
Pip UBIsap ay} ‘a1) Mo} 00} pauZisap
SEM PU]}JAM AU} JO JaAa] 1a}eM
JPUOU 34} JO SjaAQ] Ja}eM pazenaja
sey waysAs aeuieip Bulaiazad ayy
‘(WS'0<) uoWeaBan
yoddns 0} daap 00} aie yey) seaie
pue}jam ul BurynsaJ jana] Sum
84} Je payansjsuod Jo pauZisap
uaaq sey adid sas jayjno ayy.
‘pay20]q s} adid ya}3n0 ayy,
sesned 9}q)S50q
J2Aa} J9}2M ]eWLIOU
ayy anoge YBIYy
00} A}}Ua}S!SU0D
51 ]8A8] Ja}ENA,
We}qeld
sign 49
ude:
Rectifying Vegetated Stormwater Assets - Draft water
Page 70
‘uolje}aB—an ay} Ysi}qe}sa-a pue ‘WS'O> 0} syydap Jayem Juaueuitad aonpas 0} AujawAyjeg puejjam ayy AyiqdaJ ‘p Bunjevojas Apesoduiay Aq uoiye}@8aa Bunysixa Aue aAowis ‘pue}aM ay} UIeIG - ‘(passayaid) PUE}JOM 84} Ul ]8Aa] Ja}eM JeWIOU ayy Buisies 9}epowwos3e 0} S8.inyanJjs }O42UOD INeupAy puejyam ayy anByuoday ~- “syuejdsues) Jo syuejd (a81e)) Padueape yyM sup aq pjnoys Bunjue)da_ uay} ‘Ajayenbape paddoup aq youue> jana) 483M ay} 4] “suNoY gy UY} ssa} 40 4a}em Aq pasaaod A}]2}0} ae s}ue|d Ja}em payueld AjWuaz—a1 Os ]9A9] 1832M ay} JsN[py ‘UMOp }aAa] 18}eM BY} daay 0} pasn 3q 0} aaey Aew duund e Burjue}das }soq “ued ay} yo 3Y4SIay, ay) €/L UeY} a40W OU jaAa) J8}eM ay} aAey’s! Jey) ‘pajuejdas due syue)d 84} UayM Wi Z'O U2Y} aJOW OU pue WW S'9 UeYY sow ou s1 yydap papuod wnuxew ayy aunsua 0} 48S} 3a)}NO 84} 81NBYyU0Ia_ ‘daap 003s! yidap uoljUa}ap Papuayxa ay} 4} - ’(Buyjue}das Jajje Se yons) sauna Ady Je UMOP JaAQ] 183M BY] Bulduund Joy WaysAs e ayeBIysU| - uayem Jadaap 0} Jue 12/0} a40W Sa}dads yue|d YIM puejjam ayy quejday - ‘au0z 8}Aydos3ew pue)jaM ay} Jo Bulyasai a}a}dwiod e azinbai 1M S14) “WS'O> 03 ydap ay} adnpas 0} AawAYjeg ayy ysnipy - “puejjam ayy u aw} Uo}}Ua}~ap JEUO!}0U BY} BINpa. Oj Jasi1 Ja}INO ayy asNByUod-ay suondg (u01723a8aA yoddns 0 J9Aa] 483M jewWJoU Je daap wW So Wnw)xew) auoz a}Aydoi9eW 24} y8no143 syidap pasisap ay} sayd}ew pue sauljapin5 ub}saq }2}Uy2a] AY} YUM 4UA}S|SUOD S} UBIsap ayy BUIWYUOD - WW OS + 0} UB}sap ay} sayrjeW AaWAYjeg ayy BuIWyUOD - Aadins payanijsuos-se ay} Bululeyqo - raginba 1M iy | }9a.109 $) uBisap jenz3e ay} pue sjara} e109 34} 0} payanwysuo> uaag sey AaWAY}eg pue}jaM ay] Jeu} ApLIaA, “uydap uonuayap papua}xa BY} 0} $8}2]1109 sly | JaS)J 18}JNO pue}am ay} UO seIYyO Woyjog pue do} ay} UaaMjaq s]aAg] UI @dUaLaY}Ip 84} 499Y>, ‘waysAs aBeueip weassumop 34} Ul JO Jas} J8}}NO BY) U] SaBeyI0}q OU ale aay} 4994 “e0e}/d ul ase sjanaj Uo}}epuNu) ayy J0y sjue}d 39.409 84} WLUOD pue sisAjeue Aduanba. uol}epunul ue aye} Japuy) 48S) 18]1NO ayy Jo UB\sap ay} yDaY> “BUOZ 2}]EUN}D BY} JOY aZ1S PUe}JaM a31}IeId ysaq ay} 0} asedWOD pue JUSLWYD}29 84} 0} UO!eJa/ U! PUe}JaM a4} JO aZIs ay} 4994 “Juatuyd}ed ay} 40 aZIs a4} WIYUO? suoy7e31)seAu] *A\2a.LOIU) payan4ysuod 40 pauBisap sem pueyam 34} JO auoz ayAydos9ewW ay} YBNoIY AnawAyyeg ay} asnesaq (WW S'0<) u0}}}a8aA j10ddns 0} daap 00} ae }ey} Ja}eM JUBUeLIAd Jo sealy “(wS'0<) yBiy 003s} pueyam 4} JO UOlJUa}ap papuayxa ay) “auu} Jo spoyad BU} 10} y8}y WeWA! 0} s}aAaq 187M asned ued sanss) asay} JO yOg (say ZZ <) Bu0) 003 s} pueyam BY} JO ALN} UO!JUaJAp JeUOTJOU ay} - (uo18a1 21,euN)9 9y;Dads AY} 404 aZI1s 821}9e1d ysaq ayy ey} Ja]}ewWs “2'}) JUaLYyD}e9 ayy 0} UO}}e] 84 U} JEWS Ss! pueyaM ay} - sasnedaq (Shep p-€ LIY}IM JaAa] 4J8}2M JPUIOU ay} 0} y9eq BuIWIeEUp uey] Jaye ues Bulmo}}o) spoyiad Bu0} 10) padeBua si yydap uoijuayap papuayxa ay ‘ssauanyajyja 2180)0,)pAy Mo} Sey pue}jaM ay] sasned e1q)SS0q wra}qoig SHDN Rectifying Vegetated Stormwater Assets - Draft so waterbyde
Page 71
‘papuawworas $) UZISaP PUe}}aM ay JO MalAa aAISUdYadUOD e ‘sased asay} Ul ‘pausisap Ajayenbapeu! uaaq sey pue)jam ay) Je43 sueaw A}jesaues 3.1n}2N1}s ]O1]U0D DINeupAy e yo aduasqe ayy) ‘wamod sujew 0} pa}2auuo) duind ajBuis ® BIA PaUlep aq 0} pueyaM Ay} Mo}/e |]IM SI adJNOs Jamod 2 0} 8S0)9 pa3230] aq Pynoys yid ay ‘payjeysu! aq 0} paau jim BABA e SU}e]UOD 7243 (}1d Mau JO) 18}3N0 a4} 0} pue}ZaM ay} JO sau0z Jadaap ay} 8u1}28uUUO) sadid jjewWSs Jo salias e ‘Buidwnd Asea yJoddns 0] “aauepin3 10) sauyjaping ubisag jomIUYIa) 34} 0} ajay ‘paanbas aq jm Burduund jana] Ja}eM jeWOU 34} MO}aq PUe}}aM 34} Jo aBeuIeIp Mo}]e JOU Op SjaAa] Ja}eM papuod pue syiaAul wasds aeuesp Wea.ysuMmop ay aay, “pue}}aM ay} Jo Sauoz Jadaap ay) uleup 0} pauado 3 UD BAJeA SIY | “BAJA e SUIE]UOD YIIYMA ‘(yd Mau JO) a)]NO 34} 0} pue}}am ay} Jo sauoz sadaap ay} BuIy2aUUOd sacid Wes $0 Salsas es) S14} ‘Ajjeap] “aauepINB 104 saujaping uBisag }D21UYIA] BY} 0} J2J9Y PI}IN.YSUOD aq UeD }01}U03 ]aAa] 18}2M paseq-A}Ae8 e ana] 18} eM }ELWIOU BY} Mojaq ae sjana] 4a}eM. Papuod Jo s34aAu) wayshs aSeureip weasjsUMOp ayy BayAA suondo “]@Aa] 183M papuod ay} Jo Wa}sAs aBeuleip Wea.j}suMop ay} Jo SH@AU) BY} PUL JAAR] J9}EM JELLIOU BU} ABAINS “YOM IM JO1]U09 J8Aa} J8}eM paseq-ANAesB e J WLIYUOD O| *}01}U09 JaAa] 1a}eM paseg-Aj1AeJ8 e 8un}3N.}suod Aq Jo Buiduund Aq pauleip aq Ajuo Ue) pue}}aM 34} 49S) 38)]}NO Ue BAeY JOU Sap PUe}}aM dy} J} “pue}}am ay} U) JUIOd ysaMo} a4} 0} A)qetajaid ‘aAa} Ja}eM |EWIU ayy Mo|aq $]aAa] 0} AjAeIB JEPUN UIeIP 0} PUE}I9M BY} SMO}]e JEU} La}SAS JaY}O JO BAJA ® BABY P|NOYs 39}INO ay | “pue}}aM au} Jo JaSiJ 3a}3NO ay} yadsuy suojeSyseauy “UJ8M JO ‘aAjed ‘adid UMOp-Meup OU $] 8484} 8") ‘UoI}e)Ndyuew jada] 4a}EM Mo})e 0} pa}In4}SUOd Jo pausisap SM 94N}9INJ}S ]0.1}U09 IINeIPAY ON Sesned a}qissog wus}ueyrau uMop-Me1p ous} asayy we]qold 51 Draft wraterbudess Rectifying Vegetated Stormwater Assets -
Page 72
“salqJAy}Ie aueuA]UIEW pue u0}}3adsu) Joj ssaa2e ayes ap\Aoid 0} ynoAe} ayy AjIpoyy - “papuawworad Ss! 7:1 40 adojs wnuxew y ‘suayeq aes apiAoid 0} puejam ayy Ajipo, - “u01}2}a30A Jo Bu|3uUaJ Se yans sJalieg Buisn jo.3uU0d ssa27e |eysSU] - ‘asuodsa. ay) apin3 }}1M 3X8}UOD a}}s }eI0} ay} pue (\y xipuaddy) s8uipuy juawissasse ysS1J a4) Jo aWOD3N0 ayy. ‘uoyjeyaBan Ayyeay yoddns 0} y8noua moyjeys si sty “WS'0 s} yydap WinuixeW ay} Os sease 4a}eM-daap Ul-}14 “saspa ay} Woy sapeAuy AyjeridA} Yy>1yM ‘sse8 esed se yons spaam apadui 1M apeys ‘apeys pue 138A09 asuap aplAoid yey) saisads YIM suayeq ay Buyjueld Aq spaam jo ssasBu) ainyny ayy UaAdsg - “powiad yno-Bu)Aup pasinbas ay} ynoge aaiApe ysijelads uje}qQ ‘puey Aq aAowias 0} ssa23e Mo}e 0} salads paam UY} }]P} 0} pue]} aM ay} yNo BurAUp pue Buruleip saAjoaul poyjow BUC 'S}8SS\7 18]0MUWI0}S payojaba, Buiuioyujoyy wi pa}s}| Spoy}aw }04}U02 Buisn sai3ads paam ayy arowa, Ajajajdwio> - suodo “a]qe} S]y} Ul SJayeq paposy, 0} 1ajay “sauljapIng JUALWYSs)}qD}S3 PUD UO}IINIYSUOT pue sauljaping uB}sag jo2!1uy2a) ay} Y}M adueps0dIe U} pa}IN4ysUOD pue pauSisap sem pue}}eMm payan1}suod ay} 4) Ajijuap} 2yBiay pue JaA02 u0)}e3aBaA - ]@Aa} J832M JEWOU By} BAe pue Mojaq YjOG sadojs Jayeq - u01}e}a3aA Ja}auiad 10 Buyuay se yons ‘ssa}eg pue ssa22e ays - ‘apN}DU) pasapisuod aq 0} paau ey} Sjuawaj—a UBISEg “yxipuaddy YM aduepsoze u) JualUssasse yS1J Ajayes d))Gnd e aja}dwio> “weal}SuMop pue pue}}aM ay} YPM U0}}e}aB—A a]qessap ayy UO SapIdiquey JedIWayd Jo s}2edwn je1}Ua}0d ayy JapisuO> ‘pasapisuor q pynoys ‘suo)ydo jo.3U09 pue adueJa}0} 1a}eM ‘saun} Buipaas ‘sigey Buimoi8 ‘8a ‘sajdads paam ay} Jo sd1}S1a}De1eYd Je21Bo}o1g ay] Sa1Baze.3s }o.14U09 10 }eAOWS paam auIWe}3q *(pue}29M ay} 0} A}}2a1p pa}2auU0d aye ey} seare Buijou Ajsejn21},1ed) spaam Jo aduasaid ay} 104 seaie puke] SuUIOfpe pue sAemiayem wWea.sysdn BuLyd9y> S@pN}ou} SI] “UO}}2}SaJU) paaM ayy JO asned ay AjUap] “juasaid saiads paam ay} WYyUo> Su0}}e3),S2AU] u0}}e}aB—a Ja}auliad Jo ye] - ]04}U03 $S993e JO De] - s}jem Jo suayeqdaays - 70} anp ag Aew pue}yam 34}. unyyM (ZulUMO.p “a"!) spuezey Ajajes jeuaj}od pue ssazze aqGng (spaam Aquonestuojos pue Ajyeyi0w quejd ur Buiyjnsa YBiy 00} s} ara] 48}eM ay} ‘B'a) }O1JUOD jana] Jaye - Ypjnw pue jy payeujweyuo7 - (sp.nq Ba) siojap - @S]UO}O3 0} spaam Pamo}je sey aunjiey uoijeyaBap, (suiBsew puejjam 34} Jo Buipeys “B'a) uon}e3aB—a Jayauniad yo Aysuap pue add) - aoueua}uleWw pue uonsadsun JeynBai jo ye] - speo} /suo}je13Ua3U09 JUALIN YBIH - pajejnuinase sey Juapas ssaoxq - quawypjed weajsdn ay} UI Spaam payjoujuosup) - sesned a1q)5S0g Ayayes 2yqnd ajgeydesseuy eS81AN2e aoueuaqulew PIA Ajaalaaya pa8euew aq youued jey} (spaam peBsewiqns Jo ‘Buljeoy ‘juadiawa 40 1803 %OL uey} 4232818) 4803 anissaoxa JO ssaiBul quays}siad - spaayy W3}qQo1g 6. In Queensland, the Land Protection (Pest & Stock Route Management) Act 2002 imposes a legal responsibility for landowners to control declared weeds on their land. Regular maintenance must manage these weeds. Refer to Maintaining Vegetated Stormwater Assets for general advice about managing weeds. nydesign Rectifying Vegetated Stormwater Assets - Draft 0 water
Page 73
“ysiu ay} Buunp pue ysnp ye Ajeynaij4ed
UyeqUNOY 34} UNY “eIB4.INs Ja}eM qINysSIp OJ UJEJUNOY e jje}SU] -
“sease yueuse\s
BAOWA! JO BINA O} 83!Aap UO}}2)/NI}}84 JO UO}}eJae Ue |JEISU] -
yelgqey 8upaeig oynbsow anowas
0} Jap L) pue)}aM ay} LIYPM SauOZ jesaayda BuIseasoUI »
{uoyendsas ease) sydnusip
yey} Uo}}De BAM B}OWOId Os}e seae Ja}eM Uado) sauOZ
a}Aydos2ew ay3 0} sio}epaid o}nbsow 104 ssa339e adueyua
0} pue suojepaid oynbsow 10) yeyqey aplAoid 0} Japio ul
sjood daap Suipiaoid ‘B'a ‘pueyam ay} jo yjdap ay Buisea.oun «
(suoijenyis Auew ui je31}3eNd aq
you Aew S143 JaAamoy ‘eap) s} SAaBpa ]e917.1aA Buisn) (saysuaq
Jo syueq Mojjeus ‘yey Buyeuma “B'a) 7:1 yo adojs wnunuw
2 0} SUIBIeEW pue}}aM ay} UO sadojs Ja}}eq ay} BuIsea19U)
‘BAJA ABW S14] “Sease BuIpaaig oyNbsow
0}. ssa39e Joyepa.d aoueyue 0} pue JeyIqey Buipaaig oynbsow
Je}quajod asunuw 0} Japso UI pue}am ayy jo AjawWAyjeg
34} Ay]pow 0} Auessadau ag Aew }! ‘suonenyis aos ul -
“aeAse} oINDsOW
84} UO pey sey JUatW}ea} a4) Jaya
EYM U}e}I9ISe 0} Japo U) S]uaW}eaJ} ApId}Ae] Bulsn UaYyM
UayeHapUN aq pjnoys ease JaB1e} ayy yo SAaAINS JuaWyeaI}
-sod pue -aig ‘Alessadau pawiaap S$} ‘sapiaiAJe] Se yons ‘syuase
103}U03 Jo asn ay} JI syeIsads o}Nbsow e Woy ad1Ape yaas -
-(ysy aaneu) ssojepaid aanpo.juy -
“seaue daap ay)
WOJ} JUBWIPAS Pa}ejNLWNIIe AoW O} pueyaM ayy aspaig -
‘yay aAoway -
“yno payue|d pue pajjy aie sjood payejosi Aue yey} aunsug -
suondg
pue}jam ay} Jo auoz ayAydos2ewW! ayy
y8noiy) syydap paisap ay} sayd}ew pue saujjaping ubisag
JbD}uyIa) BY} YIM 4UA}sISUOD S} UBISAp Jen}Ie ay Buiwsyuod -
(ww 0S -/+ 03) uBisap ay} saysjzew AawAyzeg ay} BuIWUYyUOD -
Aaasns payonsjsuo3-se ay Buiuieyqo -
sauinba | SIy | “398109
5} UB|Sap jen}>de a4} PUP S}3Aa] 1981109 ay} 0} payInsysuod
uaag sey AawAyyeg pue)}aM ay} Jey} AJA ‘pueyaM
84} UY} Juasaid ate 133M Jo Ss}ood JueUBe}s 40 paze}os) 4]
syeyigey juarelpe pue puej}am ay} uYyIM
Ayisuap uoiejndod pue saizads oynbsow }jnpe Bulppne -
sjood moyjeys payejos} Aue ul osje pue pueyjam ayy Jo suIS sew
aU} punose Buipaaig oynbsow jo aduapiAa 104 BuNyVayD_ -
sapnjoul
uayeVapun ag Aew ey} syse] *}s!}219ads o}!Nbsow e ynsuo>,
suo} 23) SOAU|
4Jajem
Jo sjood yews Buyjea.0 Jay) -
uo1}3nJysuo3 100d Jo uZIsap
2y}@WAY}eg Jood 0} anp pueyam
Ay} Ul 48}2M Jo sjood payejos! -
pueyjam
ay} yo AyawAyjeg Mo}]eys ay 02
np siojepa.d oyinbsow Jo y2e}
Ja} 2M payije.ys Jo yueuse}s
:Aq pasned
aq ued saoyinbsow anissaoxq
sasned a}qissog
saoyinbsow
OAISSBIXY
wa}qoig
Rectifying Vegetated Stormwater Assets - Draft WOterbydesign 53
Page 74
“s.s18M pue sadid ja)}no Pue }a]U) 3°) 'S8N}INJ}s }O4jU03 DIjNeIpAy puejam Ajpoy - “uojeyaBan pue}}2M ay} Ysi}qeysa-21 pue sauoz panos ui losdo} azejd-ay - “pue}}aM ay} 0} SJayeq ay) UMOP Paaj ey} SjaUUeYD pauy-4904 ]}EWs 0} SMO} Je19}e] Jag - “Bulyreaq Pue U0}}39}01d 4301 YIM Seale papoda ay} ad/0jUS-ay “$8.N}9N4}s DI)NespAy ayy yIN4ysuod-a4 pue UBIsapay - ‘euoiqauny Jou S} 724} pue}}9M 18812] e ueYY pue}}aM “ay}ewS yng ‘BulUoIDUNy Ajsadoud e aney 0} 133g S13] ALON “auOz ayAydoteW ayy 4o 8Z)S 84} BdNpa. AewW YDIYM ‘jauUeYD pue 11am ssedAq moy-YBIY pue puod jaju) ue Buea aAjOAU! pynod siyj “auoZz ayAydos9ewW ay} punoie smoy yBiy BuissedAq Joy sayunyoddo mainay - “swia}sAsoda Weal}SuMOp uo yedw) s}1 pue 423}1) Uo UB}edwed UoNjeoNpa ue ayeyapuy - ‘adeds uado a1)qGnd yuazelpe ul sung jesodsip Jay) apiAcig - “pue}jam ayy $0 BUOZ }a]U) B43 0} ssaDIe Asea YPM y9eI Ysed} e aJeJOdIOIU] - “DEJ YSes} e JO JUeIN)jOd ssolB 2 8'3 ‘s}o..UOD 497) YIM Wa}sAs aBeulesp Weassdn yyoay - suondo AyD0)8A Ss} pue Wo1y BuIWOD SI MOY alayM - 4NOIS BY} JOJ UOSedI BY} - 4n03s BU} JO UO}}30) ay} - sWWsyU0d 0} (a}qissod J) jeyuies Buynp) uoN}DadsuI ays e a3a}dwW0> “AUM pue 8u1JN330 Ss] nods aaym AyUAp! 0} ules Suninp y3adsuy ‘pue}jam ayy Yy8no1y] sAow sMoy Moy WJYUOI 0} UO}}EW4OJU] Pa}INJ]SUOI-se pue UBIsap ay} MalAa.! pue sain}anijs 2)/neJpAy ay} 40 Uo}}3adsu) ays e ayeJJapUy) “unods Buisned aq AeW Jey} SMO} BA}89AL |}!M BUOZ a}AydoseW ay} pue ,aUI|UO, S} pue}38M pa}InJsuOd ay} ‘ssedAq MoY-YBIY OU S} a49Y} J] ‘A1o}3eJS1} eS aq Pynoys We! BuLiNp uo}}Dadsul ays e YaAIMOY “91N}INJYs BY} JO UONIUNY D)]NeupAy ayy WUD UeD JaauIBua JO ysijeinads y ‘puejjam a3 y8noiu} ssed jm smoy YBIY 3e43 Alay] 51 }] 18M e 5] aUOZ ajAydosdeW ay} 0} B4njoNAYs 38)3NO BY} J] “saJn}9n4ys puno/B1apun ela aq Aew smo} y8iy SuissedAg ‘wa}sAs jauueyp pue ‘sam sseddq MoO|-Y8ly ‘puod Ja]UI AY} LUYUOD 0} UO}ZEWOJUI payoNJjsuoI-se pue u8}sap ay} MalAa pue uo}}3adsu! ays e ayeyJapuy) “pue}aM ay} 0} Jay1] Jo adnos yaiy e Ajqeqoid ase speo, ueW Jo ‘}}e}84 ‘Je!24aLULUOd ‘}e1ySNpUl 4o seaue Auy “adeds uado a))Gnd quazelpe 40 ‘juaWYr3e9 ‘sulesp pa}2auuod A}}3aIp ‘(waysAs aBeueip wea.ysdn) auoz ya]u) 84} apNjau Aew siyy Jay) Jo sadinos Asewrad Joy yay, suo} eSpsonuy “$8)}190]8A YB1y pas}jeso) ae aay) “pue}39M ay} 0} Juasefpe Ajra.np USLUYI}9 |JEWS e WOJy pue}aM yj Jajua SMOY adejNs je193}e] °$8]}190)8A YBly pue adseyrsip ysiy paonpoid sey Wo}s awad}xe Uy “auoz ayAydossew ayy OJ) MOY YIN 00} BuMo}e ‘pazis A}}38.09u) ase SB4NJINIYS Yalu ay} “auoz aAjydosew 84} BuLJa]UA aie ‘SMOL! JUAN ABE} ‘SU)PN/IUI ‘SMO}J JUAWYI}L9 }]e OS ‘auoz ayAydoi2ew ay} yo Wea.ysdn sseddq moy-yBiy ou Ss! aJayy wea.ysdn dex queynyjodssoiBpapeye - Buyayy ayqnd_ - Joj payesiyiu UBisap ay} Ue JaYBIYy ale JUBLWYD}Ld 94} WOLY Ja} JO speo) - :Aq pasnes aq ued Ja}}I] aAlssaaxy Sasne B}q)SS0q ssayeq paposg 48}}!] aAISS89xJ wia}qo1g GeSiGn Rectifying Vegetated Stormwater Assets - Draft 5 terby wart 54
Page 75
“quawaseuew nods Zujus}sap uayM sauljapin5 uBjsaq }02}UYy2a UI pap|Aoid ad1Ape ayy Japisuo> ‘(UOWeYeBeA ‘Busayeq 904 8!) sjuaw}ea) adeyins Burys!xa pue saij190]aA ssedAq ay} Japisuo’ ‘ pasn saysjnw xijew aiqy papuog JO Say s)nw-o1pAy pue pa}dajas-as ag 0} paau Aew saigads Jue} ‘U0}}2}88A ay) Yysi}qeysa-a. pue sauoz pasnods ui losdo} ayy 22e}d-ay ‘Bulyreaq 4201 YIM Seare papoa ay} adu0yUa-ay - “AM BUY ,Ul Ady, 0} 1aWeq ay} JO do} 84} Buoje wWS'0 3sea} Je 0} pue sia}}eq ay} yo YYBUA} }INJ yz dn ssayeq 490J paynoi8 pue 3S aM a}aJ9U0D ay} puayxXy - ‘uoljeun3yuod 198.109 S}] 0} 1S89 JI9M ayy Appow Jo yN4ySUOD-ay - ‘jos ayy ade)da1 pue aAowias ‘Jou 4) JBAaMOLY] ‘ayqissod aq Aew sneda nyis-ul ‘sased atuos uj ‘suoleoyioads BY} J8AaW 0} SUOI}do 404 A4OJeJO Ge) }IOS BY} WOLy aDIAPe Yaas - suoydo “INODS JAYLINY plore 0} ]23139eId se UOOs Se asUOdsaL e JUaLUA}LU| Ayin0}A s}) pue Wot Bu]WOd si Moy alaym - 4N03s ay} JOJ UOSeal ayy - ANOIS G4} JO UO}}EIO} 8y} - :LUSYUOd 0} (a}qissod 4 jjeyuies Buy np) uondadsui apis e ajajdw0> “JBM BY} JO aunjles pue Uo}S0J8 8}8)dWOD plore 0} papaau SI JNOIs ay} XY 0} asuOdsaL pide. e ‘paposa uaag sey |10S Asay 18M ay} 0} JUaDe[pe InoIS WYyUO? 0} ‘ules BuLinp Ajqesajaid ‘uoradsul ays e ayeyapur, ‘uo}sosa Jayeq ay} Jo AWUIIIA Y} U) (WW OOL) yydap-piw pue adeyNs Je sajduues j1Os 43a))07) 01321 uol}dJospe winipos - (uoques) Jayew riuezio - (syes ayqnjos) Ayes - Hd jos - UO}}NG!IYSIP ZIs ayaIyed los - ‘BujJapisuod ‘(€00z) asn uapip6 pup Burdoaspup| 40 sjlos—6ipysy ul suoizeayioads ay} S}aaw H 4) ApyUApP) 0} jos ay} Jo sisAjeue Ue aye} Jap, $u0}}23))SeAu] “und20 Aew nods ‘jauUeY? ayy U) payley sey Uo!}e}aB9A ayy slay, “$31}190}9A YBIYy jo yNsase $e 1N330 ued JNODs ‘ssedAq MO|-YSIY ayy Buoje apes ayesapow e YIM pa]2N1jSuOd ae Spue}}aM Jay “AVIDO]BA YBIY Jo YNs|Ie se JN320 ued INOds ‘ssedAq Moy-ys8iy 34} Buo]e apes ayelapow e YM Pa}9N1]Su0d a4e SPUETJAM aay; “eM ayy BuIDIS SMOY YYIM 48M a} Jo aBpa ay} punowe 1n330 ued Jnods ‘jauUeYD ssedAq Mo}|-yBIy, dy} pue pueyaM ay} Jo suaeq 84} dn papuayxa jou s} uol9a}01d 901 pa}no8 pue jsaJ9 aM ay} J| (OL <) uoye1 UoAdiospe wmpos - (%S>) $]BAB] UOGIED MO} JO SjaAa} jes - (%0Z < Ba) Juaquod pues yay - (%0€ < Ba) yuayU0d AED - ‘yBiy sey ya} ‘ayeridouddew si los ayy sasned 31q)SS0q jauueys sseddq mol-yBiy ayy JO 1n0IS aunpey JO UOISOI NaN, wea}qoig 55 Rectifying Vegetated Stormwater Assets - Draft waterbudes
Page 76
“JBAOD UO} }eJaBaA ayenbape Buiysijqe}sa-a4 10 Buiyseaq y901 Y}IM WW43q 84} Bu1940JUa-a1 ‘810 Ae}> e BuIJINIySUOD BA|OAUI Aew yay ‘Aq3edes Buipjoy-sayem pue Aj1qG2}s Joy pung 84} JO WO}}eIY}1.189 |ed]UYyIa}0a8 ainsua pue snoas Ajay - “Ju UeqWIa a4} UIYIM Ja)INO adid ayy punoLe Jey}oO2 e eISU] - “suo}}e30) Ay130]8A yB1y u! UOIyIa}01d )201 apiaoid pue pueyam ay} ui s]aAa} poo} jerjuajod 34} 40 do} ay} aaoge |jam pung ay} asies ‘pazinbai avayAA - "8.1N}9N43s BY} J9N4ySuOd-a1 pue aAcWaY - “"UO}}EPUNU] P}OAe 0} a.N}INJYS BY} 0} SpuNowNs ayZasiey - “PIOA By} OJUI }}OS 34) edWOd pue a.injoNJ4}s ay} 0} seate jUade[pe ayy ayeaeoxy - “JUALLUEqWUa BY} UIYIIM Ja}3NO adid ay} puNo4e 4e}]09 e }]e3SUI ‘los Bupunowuns 84} 0} 84N}3N4}s BY} Jo ,L) BulAay, a}enbape apiaoid 07 48PJO U) 8.1N}3NI}S BY} 0} Seale Uare[pe ayy ayeAeIxXy - “AANJINAYS BY} YPM UO!}ILIBIU! PlOAe 0} SMO} JIAIPAY - suondo “3)G2} S14} UI aunjles UONe.aBaA, 0} Jajay “JuawWUequIa Jo punq ay} Jo ainpie} jerqUaj}od ayy pue nods 4JayLIN plore 0} }23139eId se uoOs se asuodsa, e yuawiayduuy Ay20)8A S}1 puke WO1y BUIWOI SI MOY alayM - 4no3s ay} JO uoseal ay) - 4NOIS BY} JO UO1}LI0) ay} swsyuod 0} (a}qissod 4) jjeules Buynp) uoi}3adsu) apis e ajajdwo> “9.1N}INIYs BY} JO Ain}1eJ ]e}]Ua}0d Jo nods 4JayLNJ plore 0} }e9}3eud se UoOs se asuodsal e yuaWa|dUy AYI20)8A $}} pue WO.1y BUIWOD S) MOY aay - NODS AY} JOY UOSeaJ ayy - JNOIS AY} JO UOI}EI0) ay} - sWIyuOd 0} (a}q)ssod J) jjeyujes Buysnp) uoijsadsu ay}s e ayaydwo> suoe8))seauy “a8ue] ase puod yayuI ay} Woy au0z ajAydo. ew ay} Buaqua smoy 24) aay yBiy ag Aew saiyi30]aA ]220) ‘UBisap ay} u) paplAoid jou si uonedissip ABiaua ayersdoidde 4 (J@A09 u01}2] Bad OU JO ayenbapeul “a'l} sNOIs WIJ UOIII8}04d Jo yDe] - (BuddoyJeao 8U}}|NSB1 Mo} 00} Jas S$} pungq ay} 40 3S819 91) JYBlay punqyasoaM - adid pue 1d ja)3no 8y} punose aunjey pue Buyjsuuny - (s}los s1pos “3'1) sos painyonjs Ajiood joasn - :0} anp Buipo.a ase spung ay) “nods pue Sd.N)}24 }}OS U) }JNS|1 UeD JazeM pue ‘}]OS ‘8381909 JO UO}}DeJa}UI BY] “A\sado.d u) paday ou ase S8.in}onuys “a1 ‘payon4ysuod Ayood sem pue}am ay) sasned ayq)ssog ANOIS UOI}L}aBaA, aunpey quawyuequiy JIM ayy UeYY Jayjo sainyaniys punowe no2S wra}qo4d SIN Rectifying Vegetated Stormwater Assets - Draft J pyde water 56
Page 77
a}qe} iy} UL) aNjiej Oe aBaA, pue spaay,,O}1ajay - “u0}323838A Jo Uo}}eBedo.d 10) suoljipuod ajqezns ysi}qe}sa 0} ¥o}}23a8aA ay) juejdas Buissiw ae uo}}e}aBaa Jo spueg aay - “BulpIN219-110Ys doys 0} puejjam BY} U] SUO}}eI9] UES LIYDM auOZ jeJaWayda ue yeSU] - “pueyjam 24} Y8N0.1Y} Mol UaAa 3}e}1)!9e4 0} Japso UI spung YM YO.9y - “u01}2}aBaA 4} ys!}qe}sa-a pue ‘Ww S'O> 0} syjdap aanpai 0} AjewAYeq ay} Jo Syed JueAaja, ay} ajyosd-ai ‘pueyam ayzuIeig - ‘auyjaping Juawysijqo3sy pud u0}}9N.12SUO} ayy pue sau}japing uBisaq joI}uYyIa, U) pap\Aoid ase pue}jam e 8u1}3N4ysu0I—a Jo Buiusisapau soy pasinbau sdays ay) “auoz a}Aydossew ayy adeysa. Ajayajdwioy - ‘moy Aq pase8usa aie sauoz peap ainsua pue sy}8ua| MOY 483U0] 8}0WO.1d 0} SUO!}e90) UBAIB Je SpuNq Yyoay - *$8.1NJINJYS J9}}NO JO a]U) BY BAO) - suopdg “ajqissod aq sAem|e JOU }]M Spueg }U8}S!SUOD pur XILU |]IM UOI}e}aBAaA pue}jay 'UoI}e}8BaA Jo pueq yea Je MOL) 0} adUe}SIS8L jUd}S]SUOD e a}0WO.Id }}/M SIU} ‘MOL AU} O} Je|NDIpuadiad ase yey pue}}aM ay} YBNoJY) UO!12}8Ba Jo spueg aq pjnoys ajay} ‘Ayjeapy (euy20uauufy anijQ ‘8'a) pasun320 sey sau0z a3Aydos.ew payam AjjuaueWiad ay) oI passasut aaey spaem JsnqoJ a8e] Jo aJayM seaite Supnjaun ‘pueyjam 34} UIYIM UO!}e}aBaA Jo AySuap pue UOI}NGLYSIP ayy y9ay>, a2e}d 398.1109 ay} UI a4e spung ay} pue ‘(uo1e}@Baa y0ddns 0} jana] Ja}eM jeWOU 3e daap w ‘9 wnuxew) pue}jaM ay} Jo auoz ayAydo.oew 34 YBn01u3 syuydap patisap ayy sayozew ‘sauljaping uB)sag }O2}Uy2a} 34) YPM JUa}s!SUOD S$] UBISEp ayy BuUIWIYUOD - Ww 0S -/+ 0} UB\sap a4} seyszew AsjawAYjeg au} BuIWYyUOD - Addins payanijsuos-se ay} Buiueyqo - :aginbau j]1M S1y| “392409 S} UBISAp 4} YeY} pue sjara} J9a1109 34} 0} pay3n4}suod s} AsyawAYyeq pueyaM ay} JeUy Aya sque}d jo uojinquisip Ayszed e sey pueyjam ay} 41 BulAlasgo - *SU0}}L90} }8]}NO pue }a]UI pue O1VeI YIPIM-0}-Y]Bua} palisap ay} sayo}ew pue sauijaping ubisag JO2}uy>aJ BY} YM 3UA}s)SUOD S! UBISap jen}de ayy BulWsyUOD - WWOS-/+ 0} UBIsap ay} saydzew AsjawAyzeq ay} BuIWUyUOD - Addins payonijsuo3-se ay} Buiuieyqo - vaunbas |}IM sly] “SMOY }daz0e Jou Aew 3ey} sauoz peap, Aue Aji Uap! 0} pue ‘sa.inj}anJ}s Ja}yNo pue Jo]U) BY} JO UOIZeI0) aY3 (MA)L(7)S UeY aJOLW Aq Pjnoys 3) O1VeI YIPIM-0}-U}BUI] 43 AJ1J8A 0} UOIeUNSYUOD puejam ay} MalAay su017e31}SeAu| (pue)am ayy uy sured mo} jejuaJayaid 40 Juawdojanap ay} aBesnooua Aeui sayyisuap UaAaUN YIM U0}}2}83a,) ssa1Bu! paam 5} 3484) Jo ‘payies sey uo}}e}aBan ‘AjUaAsUN Pays)qeysa sey uoleyasay, “ease PUR}aM BJOYMaY. YIM saSeBua Ja}eM ainsua 0} Jue}IOdW) aue spung ‘spung Buissiw ase aay) “JajIN0 ayy 0} SMO|JU] }JBUUOD A}}3a1P JY} SaudZ daap suieyuo2 AsjyawAyjeq ay) “wayyy punose 48}2M 34} Buyjiaaip pue sduiny> uy Buimoi8 ase squejd Jayem ysnqoy “moy Aq paBeBua jou ae auoz a}Aydossew ay} Jo syed pue 28]U) dy} 0} aSo}D s} JayJNO ay “(M)E(A)S UeY ssa} $} 01924 Y}p}M-0}-4}Bua] pue}}aM ay |. sasne> 9)q)SS0q sMo\y go Bun}1N9.19-3.104S wie}qoig gn 57 a veaterbudes: Rectifying Vegetated Stormwater Assets - Draft
Page 78
“Sw00}q |e8\e uaa.18-anjq Jo aduApIAa JO} 'saye] JO Spue}}aM Se YNs ‘salpog Ja}eM WeatsUMOp JO}UOW Ajaso|} + “uay2}Japun S} UO}}3e IY} a1ojaq yyBnos aq pjnoys aa1ape ysijei3adg ‘suixo} ayeulUNja 0} asOp Uoqe?) « “Bunua, Auesoduay yj Uiseg JuaWIpas ayy 0} ssaI2eIIIqGNdUNsaY « “ssid yeay jequajod BY} JO WJOJU) 0} UISeq JUBUIPas a4} puNole aBeUBIs are]q « ‘@pn}au) aeBje usaaJ3-anjq 0} sasuodsas uawa8euew jeua}0q - "]8A8] 48}2M JEUIOU BY} BAOge W E'0 0} ara] AJM JEWOU a4} mojaq WS'9 Uaam}ag aBued pjnoys suydap puejjam paqueld jeuy, ay ’syydap aonpa, 0 oso} ppe pue } Weup (WW S'0< Ss! yydap 43]2M ajay) 133eM Uado 9%0Z UR] BJO sey pueYam ay 4] - *2w/sjue}d 71-01 32 pasinbay se pueyjam ayy jue|day « “PaAOWIa S$] BeBje JOJ 38} ]qGeY pue paajosad Ss} syualiynu yo 2240s 343 a]1YM WaysAs jesawayda ue se pueyam ay} UNY » “aedye 14 03 S489M 7-1 104 PUE]SM BY] JNO AUp pue jada] Ja}eM ay} aMO07 « ‘AWO> JO ]eUa}od Jopai e Aq pajeoipul se ‘sajueBIO pue squai}nu YIM payenjes ase Jeu} SyuaWIpas BAOWaY « ‘apnjou) suoido ‘yuawdojanap sseworg jedje yy 0) Bun -ql4JUOD Je pUe}}aM BY} UIYIIM SUO}}21}UGDU09 JUAIIINU YBIY fy - “aeBje snoyuaweyy Aq 8u1Jayj ous }e3)sAyd 0} ajqiydaasns ssaj 5} pue ‘Buipeys 0} anp yyMo018 }eB}e aaissaoxa }0.}U09 0} sdjay u0}}e}aB9A aSUAP ‘Paysi}qeysa-|jay ‘9)qe} SIY} Ul ,aN}}eJ UdI}e}aBaA, 0} JaJay UO}eaB~aA Ys!}qe}se-a4 Aja}eIpawiUN ‘Jaro BA1}2}9BEA JO 492) By} 0} 8np padojanap sey ssewoig jesje 4] - suoydg “WG'0 ay} Jadaap aie yey) seate Ajnuap) pue AjyawAyjeg pue}jam payani}su0s-se ay} Aaaing “SBu0z ysJew pa8iawiqns ay) ul juasaid aze sayAydossew yey) 994) “sauoz Ja}em uado Ajijuap) pue pue]}aM 34} UIYIM J8A03 UO}}P}aBaA Jo aBeyUaIIad 34} 49aY> JUAaWIpas ay} Jo ]e]]Ua}Od Jopa! pue UaBAxo parjossip aunseay| “SUO}}N|OS JUBWABeUeL JUBLYI}ed 4J8Y}0 Jap}SUOD 0} pue JUALI3NU a4} JO BDuNOs ay} aUIWa}ap 0} payinbaJ s) uoyje8)}sanu) Jayyiny uay} (7/BW Zz < NJ 7/BW SLO < d 14!) uBiy Ajquaysisuos ase suo}e.3Ua9U09 JUa}AyNU 4 “(XON) N-@224H1N pue (NL) UaBo.31Ny 1230] ‘(q) snosoydsoyd ajqnjos ‘(4 1) snosoydsoud je303 apnjaui JO}UOWW 0} S}Ua)J}NU papuatULWOraY ‘pUue}}aM 34} UIYM S]3Aa] qua}i}nu Jo ZujJoyuow Apyenb 4ajeM W4a}-Buo} ayeqapuy] ‘aeBje ay} JO ease ayy UI AyISuAp pue JaA09 UO!}2}aBAA a4) 42a4) suo}3e31)saAu| ‘yazem uado %OZ UeY} aOW Sey pue}ysaM ay | “JaA02 ayAydos2ewW MO] e YPM Paulquod aAey SMOYUl qualjnu payzadxa uey) J34)q “payles sey uolje}aB—aA ay] aeZje anissaxy sesned 2)q)5S0g wia}q0lg WOM) Rectifying Vegetated Stormwater Assets - Draft dest erpu sett 58
Page 79
*SU01}98UU03 Jamas ]e8a})1 Buipnjaui “quaLUYd}e9 a4} WO1y $334NOs UOWeU]WE}UOD jeIae} JAI) - “PUP}JOM AY} WOY |MayiajeM sAoWaY - “pue}}aM AY} BIUIeIp BAJOAU! Aew siyj ‘uore]ndod ysy ayy adnpau Jo aaowias puedes) - (uuunjod 487m By} UIYM papuadsns AUBUeWad ae 324} $a|a1jJed Ae) papuadsns auy) spio}jo2 Aey> Jo aouasaid ay} YM pazelsosse s) Ajpiqun} 4 ad1Ape ysijerveds 4885 ‘pasodxa usaq sey saul) Ae}9 ay} a4ayM pueyaM ayy jo seaue sedaJ pue pue}jam ayy UIyyM pasn josdo} asejday “S8}1S UO}}INJ}SUOD UO oun. JUaUpas BuIseuew Aq JO1}U09 a2JNOs aye}JapuUN pue Sq] pue SS] Josadinos Apuapy - (ulseq juaupas e ‘B'a) pue}jaM ay} Jo weassdn ainyded juaunpas jeuolpppe }]e}SUI suondo “UO}JEUILUEJUOD WOY}09 Je93e4 JO 891NOS 34} BU]WJA}Ap 0} S!}e19ads AyeNb Jayem ® YM UO} e})NSUOD U) BULJoyUOW Apjenb Jayem ayejJepur) “yl] Palg Maia 0} SU0}}!|PU09 I1}eUN]9 JuaJayyIp BuLNp pue Aep ay} Jo saw uaJaJyIp 7@ pue|JaM au} Jo suoI}2adsuI yo Jaquinu e a}a]dWo> “quasad uolynqlysip azis pue ‘ssewiojg ‘saads ysy aulwiuajap 0} Aadins ysy e ayeapun “3]Ge} SIU} Ul SWOO}q |eB}y, 0) Jajay “6lbVSY JIM adUepjozze Ui S93} pue zw 00S-06z Jad ajdwes j}0s auo aye} ‘osdo} pueyam ay} 49949 OF Jau)) Ae]3 pue}jam ay} jo aunsodxa - pue}}3M ay? WIYZM pasn jiosdo} ay} Jo JUajUOD Ae]D - ‘Buyy2ay> aajoauy Aews SIY] ‘PUe}IaM ay} UIYTM SQ] pue SS | Jo Sazinos a}eB)}saAu| "JUALUYD}ED BY} WOLY S| 10 SS j Jo Sadunos aze3!)saAu| “PUE}9M AY} UIYPM S}aAa) AjIPIquny Joo) suoye3))saAu] “UO}JEUILUEJUOD W041}09 JeIaey pue Uo}}2] 88a Jo }eAowa UI BUIyNSAL Bde Jpg Jo suo}jejndod aBue7 ‘uo}Jequnyolg u! BuyjnsaJ ase (eideyiy ‘dies Ba) suoye;ndod ysi4 “swoo}g jedje pue 1ayem uado jo seale aaissaoxa ae slay] ‘(SQL) SPilos paajossip J2303 40 (SS 1) spyjos papuadsns J2}0} BAISssadxXa 31e A134] sasned o)q)5S0q uoljeulwe}U0d WJO4}}09 Jeaaey pue Ayipiquny yBiy Ajquaysisiag wre}qoid 59 Rectifying Vegetated Stormwater Assets - Draft W/aterbyde:
Page 80
Appendix A4 – Contingency Plan Water Quality Control Pond Contingency Plan for Monitoring and Maintenance
Page 81
Water Quality Control Pond Contingency Plan for Cyanobacterial Blooms
Total Cost ($)
Procedure Description Frequency Per Annum Amount Unit Rate ($) / Unit
per Annum
Montoring for Cyanobacterial Blooms
5 Inspections (Quarterly
Routine Inspection for Cyanobacterial 2 per
Quarterly Inspection or Every Two Months hr $150 $1,500
Blooms and Algae inspection
during Wet Season)
Routine Maintenance Routine maintenance for maintaining As per inspection
540 m2 $15 $8,100
Measures WQCP frequency per annum
Corrective Actions For Outbreak of Cyanobacterial Blooms
If vegetation failure has caused algae
blooms re‐establish plants (Estimate of Estimate of Once Per
Re‐Establish Vegetation 540 m2 $20 $10,800
costs involves full replanting of macrophyte Annum
planting in WQCP)
Check and maintain upstream stormwater
Maintain upstream Bioretention Basins to ensure WQCP As per inspection
485 m2 fm $121 $5,820
treatment devices inflows have low nutrient concentrations of frequency per annum
nutrients
Treat WQCP waters over Pump ponded water over Bioretention
Estimate 2 week period
Bioretention Basin or filter or grass embankment over a 1‐2 week 14 day $1,500 $21,000
once per annum
along embankment period and monitor the impact
Carbon dose to eliminate Use carbon dosing to eliminate toxins. Seek
Once in 5 year period 0.2 Provisional $20,000 $20,000
toxins specialist advice.
Total Per Annum $67,220
Total Over 5 Year Period $336,100
Total Over 5 Year Period + 150% $504,150
* Maintenance Requirements are based on Water by Designs, Maintaining Vegetated Stormwater Assets (2012) and Rectifying Vegetated Stormwater Assets (2012). Refer to these documents for further details.
1
Refer to Water By Designs, Guide to the Cost of Maintaining Bioretention Systems (2015) for estimated costs involved with maintenance of the Bioretention Basins
Page 82
Appendix A5 – Cyanobacteria Levels Table 7.2.1 Guidelines for Cyanobacteria in Queensland Water Quality Guidelines 2009
Page 83
Water Kuruma
Barramundi Tiger prawn
parameter prawn
Ammonia (TAN,
total ammonia- 0.1–0.5mg/L
nitrogen)
Ammonia (NH3,
<0.1mg/L <0.1mg/L <0.1mg/L <0.1mg/L <0.1mg/L
unionised form)
Nitrate (NO3) <1.0mg/L <1.0mg/L <1.0mg/L <1.0mg/L <1.0mg/L
Nitrite (NO2) <0.2mg/L <20mg/L <0.2mg/L <0.2mg/L <0.2mg/L
10–25ppt 30–35ppt
Salinity 28–31ppt 0–35ppt
optimum optimum
105–125mg/L
Alkalinity
CaCO3
30–40cm 30–40cm
Clarity
Secchi disk Secchi disk
Hydrogen
<0.3mg/L
sulphide
Iron <0.02mg/L <1.0mg/L
Spawning 28–32 (strain
27–32
temperature dependent)
For further information contact the QPIF Call Centre or the DPI website www.daff.qld.gov.au.
7.2 Guidelines for management of blue-green algae in contact recreation
areas
When cyanobacteria (blue-green algae) is present in large amounts it can present a significant hazard, particularly
to primary contact users of waters. National guidelines for managing risks in recreational water were released in
2008 by the National Health and Medical Research Council (NH&MRC) and these cover cyanobacteria. The
national guidelines for cyanobacteria have been adopted for Queensland waters and supersede previous state
guidelines issued by the former Department of Natural Resources and Water. A summary of the national guideline
values that replace previous state values is provided below in Table 7.2.1.
Table 7.2.1: Guidelines for cyanobacteria (blue-green algae) for primary contact recreation
Status Guidance level Recommended action
Green level surveillance 500 to < 5000 cells/mL Microcystis Routine sampling to measure
mode aeruginosa or biovolume equivalent, to > cyanobacteria levels.
3
0.04 to < 0.4 mm /L for the combined total
of all cyanobacteria.
Amber level alert mode 5000 to < 50 000 cells/mL Microcystis Investigations into the causes of
aeruginosa or biovolume equivalent, to the elevated levels, and increased
3
0.4 to < 4 mm /L for the combined total of sampling, to enable the risks to
all cyanobacteria where a known toxin recreational users to be more
producer is dominant in the total accurately assessed.
a
biovolume .
b
or
0.4 to < 10 mm3/L for the combined total
of all cyanobacteria where known toxin
producers are not present.
f
Page 84
Status Guidance level Recommended action
Red level action mode Level 1 guideline: Local authority and health
authorities to warn the public that
10 g/L total microcystins the water body is considered to be
or unsuitable for primary contact
recreation.
50 000 cells/mL toxic Microcystis
aeruginosa or biovolume equivalent of 4
mm3/L for the combined total of all
cyanobacteria where a known toxin
producer is dominant in the total biovolume.
b
or
Level 2 guideline:
10 mm3/L for total biovolume of all
cyanobacteria material where known toxins
are not present.
or
cyanobacterial scums are consistently
presentc.
Notes:
aThe definition of ‘dominant’ is where the known toxin producer comprises 75% or more of the total cyanobacteria in a representative sample.
bThis applies where high cell densities or scums of ‘nontoxic’ cyanobacteria are present, i.e. where the cyanobacterial population has been
tested and shown not to contain known toxins (microcystin, nodularin, cylindrospermopsin or saxitoxins).
cThis refers to the situation where scums occur at the recreation site each day when conditions are calm, particularly in the morning. Note that it
is not likely that scums are always present and visible when there is a high population, as the cells may mix down with wind and turbulence and
then reform later when conditions become stable.
Source: NH&MRC (2008) Guidelines for Managing Risks in Recreational Water. National Health and Medical Research Council, Australian
Government.
7.3 Guidelines for drinking water supply storages (South East Queensland
Water Corporation)
These guidelines are based on the water quality objectives developed by SEQ Water Corporation for drinking water
supply storages. They apply specifically to storages in south-east Queensland but would be appropriate for drinking
water supply storages throughout Queensland. Note that these guidelines are expressed slightly differently to
normal guidelines. For example, a Cryptosporidium guideline of >0 implies that action must be taken if values >0
are detected. The approach used and the significance of ‘Level 1’ and ‘Level 2’ are explained in more detail in the
table footnotes.
f
Page 85
Appendix A6 – Weed Information Extract From Water by Design ‐ Maintaining Vegetated Stormwater Assets (Appendix B Identifying and Managing Weeds).
Page 86
Appendix B Identifying and managing occur. The WEEDeck cards can be purchased from
weeds www.sainty.com.au.
Correctly identifying, controlling, and eradicating weeds Declared weeds
can result in considerable time and cost savings. The Australian Government’s ‘Weeds of National
Therefore, it is critical that all inspection and Significance’ (WONS) classification includes weed
maintenance staff can correctly identify weed species. species that have degraded large areas of Australia’s
Resources landscape and are managed at national level for
A number of resources can be used for identifying consistent management across states.
weeds. State legislation may also declare weeds. In Queensland,
the Land Protection (Pest and Stock Route
Field guides and books
Management) Act 2002 has three categories of declared
Field Guide to Weeds in Australia (third edition) by C.
weeds, which are plant species that have, or could have,
Lamp and F. Collet (1989), Inkata Press, Australia.
serious economic, environmental, or social impacts.
Noxious Weeds of Australia by W.T. Parsons and E.G.
Class 1: A weed species that has the potential to become
Cuthbertson (1992), Inkata Press, Australia.
a very serious pest in the future. Landholders are
Waterplants in Australia by G.R. Sainty and S.W.L. Jacobs required by law to keep their land free of Class 1 weeds
(2003), Sainty and Associates. and must not introduce, keep, release, transport, or sell
Weeds-An illustrated botanical guide to the weeds of Class 1 weeds without a permit.
Australia by B.A. Auld, and R.W. Medd (1992), Inkata Class 2: A weed species that has already spread
Press, Australia. over substantial areas of Queensland, but its
Weed pocket guide (1997), Department of Natural impact is serious and needs to be controlled to avoid
Resources, Queensland. spreading onto properties that are still free of the weed.
Landholders must try to keep their land free of Class
Electronic resources 2 weeds and must not keep, release, transport, or sell
The Environmental Weeds of Australia (CD), Centre for Class 2 weeds without a permit.
Biological Information Technology, University of
Queensland. Order from www.cbit.uq.edu.au/software/ Class 3: A weed species that is commonly established
enviroweeds in parts of Queensland. A notice may be served on a
landholder to take reasonable action to remove the
On-line resources weed if it is causing, or has the potential to cause, an
Weedbusters www.weedbusters.info adverse impact on a nearby ‘environmentally significant
Weeds to wack www.saveourwaterwaysnow.com.au/01_ area’. It is an offence to sell, introduce, release, or supply
cms/details.asp?ID=51 a Class 3 weed.
WEEDeck (Weeds Australia) www.weeds.org.au/ Local governments may have additional weed
weedeck.htm, www.sainty.com.au classifications to prevent the spread of or to control
potentially invasive weed species that pose a threat
Weeds of National Significance www.weeds.gov.au/
to local ecosystems.
weeds/lists/wons.html
Weed identification (Brisbane City Council)
www.brisbane.qld.gov.au/BCC:BASE::pc=PC_2519
WEEDeck
The WEEDeck pocket guide series, initiated by the
National Weeds Strategy Executive Committee, is a
handy guide for maintenance staff to identify common
weed species in the field. It consists of more than 280
pocket-sized, full-colour weed identification cards.
WEEDeck pocket guides can be tailored to include the
common weed species found within a particular region
and may also include noxious weeds that are likely to
58 Maintaining Vegetated Stormwater Assets Version 1
Page 87
Common weeds species
Common weed species encountered in stormwater
treatment assets are shown in Table B-1.
Table B-1 Common weed species found in stormwater
treatment assets.
Weed species Common name Life form Where found* Status**
Hymenachne Olive Hymenachne Emergent SB, W, SW Class 2
amplexicaulis
Limnocharis flava Limnocharis Emergent SB, W
Sagittaria Sagittaria Emergent SB, W
platyphylla
Alternanthera Alligator Weed Emergent SB, W, SW Class 1
philoxeroides
Hygrophila Hygrophila Emergent SB, W Class 1
costata
Gymnocoronis Senegal tea Emergent SB, W Class 1
spilanthoides
Heteranthera Kidney leaf Emergent SB, W
reniformis
Ludwigia Peruvian primrose Emergent SB, W, B Class 1
peruviana
Typha Cumbungi Emergent W, SW
domingensis/
orientalis
Salvinia molesta Salvinia Floating SB, W Class 2
Eichhornia Water Hyacinth Floating SB, W Class 2
crassipes
Pistia stratoites Water Lettuce Floating SB, W Class 2
Nymphaea Yellow Water Lily Floating attached SB, W
mexicana
Nymphaea Cape blue waterlily Floating attached SB, W
caerulea
Urochloa mutica Para grass Semi-aquatic SB, W, SW
Myriophyllum Parrot’s feather Submerged SB, W
aquaticum
Cabomba Cabomba Submerged SB, W Class 2
caroliniana
Egeria densa Dense water weed Submerged SB, W
Elodea canadensis Elodea Submerged SB, W
Chloris gayana Rhodes grass Terrestrial SB, W, B, SW
Desmodium Silver Leaf Terrestrial BR, SW, B
uncinatum desmodium
Echinochloa Barnyard grass Terrestrial SB, W, B, SW
crus-galli
Ipomoea cairica Morning glory Terrestrial SB, W, B, SW
Panicum Guinea grass Terrestrial SB, W, B, SW
maximum
Maintaining Vegetated Stormwater Assets Version 1 59
Page 88
Paspalum Broad-leaved Terrestrial SB, W, B, SW
mandiocanum paspalum
Pennisetum Kikuyu Terrestrial B, SW
clandestinum
Cynodon Common couch Terrestrial W, B, SW
dactylon
Paspalum Paspalum Terrestrial W, B, SW
dilatatum
Setaria Pigeon grass Terrestrial B, SW
sphacelata
Ligustrum Broad-leaf privet Terrestrial SB, W, B, SW Class 3
lucidum
Ligustrum Chinese privet Terrestrial SB, W, B, SW Class 3
sinense
Schinus Broad-leaf Terrestrial SB, W, B, SW Class 3
terebinthifolius pepper tree
Cyperus Umbrella sedge Emergent W, SW
eragrostis
Celtis sinensis Chinese celtis Terrestrial W, B, SW Class 3
Pennisetum African fountain Terrestrial B, SW Class 3
setaceum grass
Conyza spp. Fleabane Terrestrial B, SW
Setaria Setaria Terrestrial SB, W, B, SW
sphacelata
Sphagneticola Singapore daisy Terrestrial B, SW
trilobata
Tradescantia Wandering dew Terrestrial SB, W, B, SW
fluminensis
* SB – sediment basin, W – constructed wetland, B – bioretention system, and SW – Swale
** Under the Queensland Land Protection (Pest and Stock Route Management) Act 2002
60 Maintaining Vegetated Stormwater Assets Version 1
Page 89
Emergent
Emergent aquatic plants are rooted in the substrate and
have their stem, leaves, and flowers protruding above
the water surface. Emergent plants grow in water depths
ranging from +0.1 m to -0.7 m and are generally well
adapted to regular drying and wetting phases
throughout the year.
Individual or small clumps of emergent plants can be
controlled using physical removal methods, such as hand
pulling, raking, or grubbing. Many emergent weeds have
rhizomatous root systems and care must be taken to
ensure that the entire root system is completely
removed, as it is possible for the plant to re-establish
from the remaining root fragments.
Mechanical harvesters can also be used for temporary
control; however, emergent weeds such as Alligator
weed reproduce vegetatively from stem fragmentation
and disturbance to the floating or emergent foliage may
inadvertently help to spread the weed to adjoining areas.
Emergent plants such as Cumbungi can be effectively
controlled by cutting the stems below the water surface.
This removes the oxygen supply to the roots, resulting
in anaerobic respiration and ultimately the death of the
plant.
The use of appropriate, non-residual herbicides is also
an effective control method for emergent plants,
particularly where large isolated clumps may have
developed within sediment basins or constructed
wetlands.
Herbicides may be directly applied to individual plants
using rope-wick applicators or hand applied using a
sponge and rubber gloves. Foliar application of
herbicides is generally more appropriate for controlling
large clumps of emergent weeds. Care must be taken
to ensure that the herbicide is directed onto the weed
foliage and that any adjacent open water areas or
non-target plants are avoided.
Maintaining Vegetated Stormwater Assets Version 1 61
Page 90
Alligator weed
Perennial rhizomatous herb that may grow
as a terrestrial, emergent, or free-floating
aquatic plant. Large mats of interwoven
stems often form along the margins of
constructed wetlands and may extend over
the water surface.
Photo: Geoff Sainty
Distinguished by hollow stems with opposite
leaves. Ball-shaped, white flower heads on
stalks to about 9 cm, originating from the
leaf-stem nodes.
Note: Alligator weed can easily be confused
with Ludwigia spp. (water primrose) and
Persicaria spp. species (smartweeds).
Flowering: December–April but will vary with
location in Queensland
Reproduction: Viable seed not recorded in
Australia. Reproduces vegetatively via stem
fragmentation, which can occur:
• naturally at the end of the growing season
from the feeding habit, and the plant’s
reaction to the feeding habit, of the flea
beetle Agasicles hygrophila
• due to wave action or physical damage by
boats and mowers
Stem fragmentation can be increased by
herbicide use.
Control: Physical removal, chemical control,
biological control
Glush weed (Hygrophila costata)
Semi-aquatic perennial herb that grows to 1 m
high. May also scramble up through taller
vegetation.
Distinguished by 4-angled stems, leaves in
opposite pairs, and white flowers to 1 cm long
that grow in clusters at the leaf-stem junction.
Flowering: All year
Reproduction: Spreads by seeds and
vegetatively by rooting at the nodes and
fragments. Can produce roots from severed
leaves.
Photo: Geoff Sainty Control: Physical removal, chemical control
62 Maintaining Vegetated Stormwater Assets Version 1
Page 91
Para grass (Urochloa mutica)
Perennial grass that can form extensive
floating mats over wetlands. Stolons
(runners) to 4 m and growth to 2 m high.
Leaves to 2 cm wide, leaf sheath with dense
thick hairs. Seed head terminal with 5–20
spikelets, each 2–8 cm long.
Distinguished by leafy spreading habit,
branching at right angles to stem, and hairy
Photo: Jason Sonneman, DesignFlow
leaf sheafs and nodes.
Flowering: Most of year depending on
location
Reproduction: Spreads by seeds and
vegetatively by widely creeping stolons and
fragments. Also spread by use as a pasture
species.
Control: Physical removal, chemical control
Cumbungi (Typha orientalis, T. domingensis)
Erect native perennial herbs with flat or
slightly rounded leaves (sometimes spongy)
to 3 cm wide and growing to 3 m tall. Flower
head a dense spike above a larger spike of
female flowers.
T. domingensis (Narrow-leaf Cumbungi) is
generally shorter than T. orientalis (Broad
-leaf Cumbungi) and has a smaller, narrower
seed spike. T. domingensis is also more salt
tolerant than T. orientalis.
Typha is able to grow in water depths to
1.5 m and often forms dense stands that out
compete and reduce species diversity within
Photo: Geoff Sainty the wetland vegetation.
Flowering: Mostly summer
Reproduction: Seed and vegetatively from
branching rhizomes (runners)
Control: Mechanical removal, slashing,
chemical control
Effective control of small Typha infestations
can be achieved by cutting the plants 15 cm
below the water surface in autumn.
Maintaining Vegetated Stormwater Assets Version 1 63
Page 92
Floating weeds
Floating weeds are unattached, free-floating plants that
grow on the surface of a water body. They are generally
characterised by extensive, fibrous root systems that
bind together, enabling the plant to develop a dense mat.
Under suitable conditions, floating aquatic weeds
rapidly form dense mats over water surfaces, reducing
light penetration and oxygen exchange. The decomposing
plant material removes oxygen from the water, which
can result in poor water quality and severe impacts to
aquatic fauna.
Small infestations of floating aquatic weeds can be
physically removed by hand using rakes and floating
booms. Larger infestations may need to be removed
using mechanical harvesters or excavators. Physical
removal is often expensive but also has the advantage of
removing a nutrient load from the water body, provided
it is regularly carried out. All removed plant material
should be relocated away from the water body and
buried, composted, or disposed to landfill.
Herbicides are a cost-effective control method when
dealing with large infestations; however, sinking and
decomposing vegetation is likely to contribute to water
quality problems.
A number of biological control methods have been
successfully introduced to control floating aquatic
weeds, including salvinia, water hyacinth, and water
lettuce. Refer to the plant descriptions for further
information on specific biological controls.
Eradication of floating aquatic weeds is difficult. All
initial control treatments must be followed with vigilant
monitoring and repeated treatments where necessary.
64 Maintaining Vegetated Stormwater Assets Version 1
Page 93
Salvinia (Salvinia molesta)
Free-floating perennial fern with ‘leaves’
(fronds) in groups of three, consisting of two
floating leaves and a submerged modified
leaf that functions as a root.
Salvinia actively grows throughout the year
and is difficult to eradicate once established
in a water body.
Flowering: Salvinia is a fern so it does not
Photo: Jason Sonneman, DesignFlow flower. Fruiting bodies containing sterile
spores that hang from the divided leaf.
Reproduction: Salvinia does not produce
fertile spores. Spreads vegetatively by
fragmentation.
Control: Physical removal, chemical, biological
Integrated control strategies that combine
both physical and chemical removal
techniques have proven to be effective at
eradicating small salvinia infestations.
Salvinia weevil (Cyrtobagous salviniae) has
proved to be extremely effective in
controlling large salvinia infestations.
Water hyacinth (Eichhornia crassipes)
Free-floating perennial aquatic plant with
dark green, erect leaves, including stalk, to
60 cm land fibrous, feathery roots to 1 m.
Plants are distinguished by blue-purple
flowers produced on spikes to 15 cm. Some
leaves are also characterised by a spongy,
swollen base that enable the plant to float.
Flowering: October–July
Photo: Jason Sonneman, DesignFlow
Reproduction: Seeds. Daughter plants are
produced vegetatively at the ends of the
stolons and remain attached to the parent
plant until they are broken off by wind or
damage.
Control: Physical removal, chemical, biological
Water hyacinth is very difficult to eradicate
as the seed may remain viable in sediments
for up to 15 years.
Physical removal should be undertaken before
the plants flower and set seed.
Maintaining Vegetated Stormwater Assets Version 1 65
Page 94
Integrated control strategies that combine
both physical and chemical removal
techniques have proven to be effective at
controlling water hyacinth infestations.
The integrated use of two introduced weevil
species (Neochetina eichhorniae and
Neochetina bruchi) has proved to be effective
in the control of large water hyacinth
infestations.
Two moth species (Niphograpta albiguttalis
and Xubida infusella) have also been
introduced; however, they have not been as
successful as the weevils at controlling water
hyacinth populations.
Water lettuce (Pistia stratiotes)
Free floating perennial aquatic plant with
ribbed, spongy, velvety leaves that overlap to
form a rosette that resembles a small lettuce.
The plant extends to 20 cm above water level
and has feathery roots up to 80 cm. The
leaves are strongly water repellent due to
hairs on the surface.
Flowering: January–March, but will vary with
location
Photo: Jason Sonneman, DesignFlow
Reproduction: Seed and by vegetative
daughter plants on the end of stolons
Control: Physical removal, chemical,
biological
Two introduced weevil species
(Neohydromonus pulchellus and Orchetina
bruchi) have been used successfully to control
large infestations; however, effective control
by these weevils may take years to achieve.
66 Maintaining Vegetated Stormwater Assets Version 1
Page 95
Submerged weeds
Submerged weeds are aquatic plants that are rooted
in the substrate and fully, or almost completely,
submerged. These plants are characterised by leaves
that are located either below or at the water surface.
The leaves and stems have specialised thin-walled cells
with large air spaces that provide buoyancy and support.
The lack of a waxy cuticle on the plant surface allows for
the rapid exchange of water, nutrients, and gas; however,
the plants are highly susceptible to drying if removed
from the water for any length of time.
Dense infestations of submerged aquatic plants can
be physically removed using hand pulling, raking, or
mechanical equipment, but the major submerged
weeds quickly regrow unless their roots are removed.
Most submerged plants spread easily from fragments.
All stems and roots should be completely removed from
the water body, as any residual fragments will result in
re-establishment and the potential spread of the weed
to downstream water bodies.
Care must also be taken to ensure that rigorous hygiene
protocols are followed, so that the weeds are not spread
to other water bodies. All removed plant material should
be relocated well away from the water body and buried,
or dried and burnt.
Most submerged aquatic plants are highly sensitive to
drying out. Drawing down the water level in a water body
and allowing the substrate to completely dry out can
provide effective control.
Herbicides can be used for controlling submerged
aquatic plants. The application of herbicides is difficult
due to the problems associated with applying chemicals
in water and the potential impacts on non-target plant
species. Seek advice from the relevant authority if
chemical control of submerged plants is being
considered.
Small areas of submerged aquatic plants may also be
treated by increasing shade. This can be achieved by
covering the surface of the water body with a lightproof
cover, such as black plastic sheeting for a month or more,
but this method is usually impractical.
Maintaining Vegetated Stormwater Assets Version 1 67
Page 96
Cabomba (Cabomba caroliniana)
Submerged perennial aquatic plant with
slender elongated stems (to 5 m long)
surrounded by a dense group of leaves and
a well-developed fibrous root system.
Plants may be distinguished by the
submerged leaves, which are arranged in
opposite groups (whorls) and finely divided
into linear segments, forming a fan-shape.
White to pale yellow daisy-like flowers are
elevated above the water surface on stalks.
Small diamond-shaped floating leaves are
also borne on the flowering stalks.
Note: Cabomba can easily be confused with
Ceratophyllum demersum (a native
submerged plant species) and some
Myriophyllum species.
Photo: Geoff Sainty
Flowering: November–March, but will vary
with location
Reproduction: Fertile seeds have not been
verified. Cabomba reproduces vegetatively
via dislodged stem fragments.
Control: Physical removal, water level
management, chemical control
Cabomba is extremely difficult to control
when introduced to large water bodies.
Drawing down the water level and allowing a
water body to completely dry out can provide
effective control of Cabomba but the root
system has to be killed.
68 Maintaining Vegetated Stormwater Assets Version 1
Page 97
Parrot’s feather (Myriophyllum aquaticum)
Submerged and emergent perennial plant
with spreading stems to 5 m with feathery
leaves.
Plants distinguished by blue-green coloured
emergent leaves that form distinctive groups
Photo: Jason Sonneman, DesignFlow
of 4–6 leaves. The emergent leaves have a
feathery appearance and are divided into
10–14 linear segments.
Flowering: September–December, but will
vary with location
Reproduction: Unknown to produce seed.
Reproduces vegetatively via stem
fragmentation due to wave action or physical
damage.
Control: Physical removal, water level
management, chemical control
Physical removal by hand-pulling and
subsurface cutting can be used to provide
temporary control of small infestations.
Integrated strategies, including water level
management and chemical control, can be
effective in treating large infestations.
Maintaining Vegetated Stormwater Assets Version 1 69
Page 98
Floating attached weeds
Floating attached aquatic plants are rooted to the
substrate and have mature leaves floating on the water
surface (e.g. waterlilies). Floating attached plants have
extensive rhizome systems, from which long stems of up
to 5 m and leaves emerge each year. Floating attached
plants often form dense stands, and the leaves are often
pushed up above the surface of the water.
Floating attached plants can only be eradicated by killing
or removing the root system. The roots are strongly
bound to the sediments and are not easily dislodged.
Short-term control of floating attached plants can be
achieved by cutting the stems below the surface,
however the leaves will regrow. Mechanical harvesters
can also be used for temporary control.
Rhizomes may be removed from the sediments by hand
raking and using dredging equipment. The removal of
rhizomes is best undertaken during the summer period
when the location of the rhizomes can be detected by
the presence of the floating leaves.
The use of herbicides is also an effective method of
controlling floating attached plants, particularly where
the surface of the water is completely covered with
leaves. Care must be taken that the herbicide is directed
onto the floating leaves and that any adjacent open
water areas or non-target plants are avoided.
70 Maintaining Vegetated Stormwater Assets Version 1
Page 99
African Cape waterlily (Nymphaea caerulea)
Distinguished by generally large round leaf
blades to 50 cm wide with irregularly spaced
teeth around a wavy margin. Showy blue to
purple flowers with pointed petal tips.
Flowers are located on robust erect stalks
above the water. Can be misidentified as
Nymphaea gigantea, which is an endangered
species.
Photo: Jason Sonneman, DesignFlow
Flowering: December–April
Reproduction: Germinates from seed, but
predominantly reproduces vegetatively from
the stolons.
Control: Physical removal, chemical control
Yellow waterlily (Nymphaea mexicana)
Distinguished by broad elliptic leaves to 25
cm wide with smooth and wavy leaf margins.
Distinguished by yellow flowers with pointed
petal tips and vertical, knobbly rhizomes.
Yellow waterlily has the potential to cover
the water surface and limit the growth of
other plants, which in turn reduces the habitat
for micro-organism, invertebrate and fish.
Note: the widespread and common African
Cape waterliliy Nymphaea caerulea, with
showy blue flower, can be misidentified as
N. gigantea, which is an endangered species.
Flowering: October–March, but will vary
with location
Reproduction: Germinates from seed, but
predominantly reproduces vegetatively from
the stolons.
Photo: Jason Sonneman, DesignFlow
Control: Physical removal, chemical control
Maintaining Vegetated Stormwater Assets Version 1 71
Page 100
Terrestrial weeds
Terrestrial plants grow on land and include the majority
of living plants. Most terrestrial plants have well
developed root systems and reproduce via flowering.
Flowering terrestrial plants are characterised by a range
of life forms including herbs (grasses, sedges, rushes,
and forbs), shrubs, and trees.
Bioretention systems, swales, and the exposed batter
slopes of sediment basins and constructed wetlands are
particularly vulnerable to the establishment and ingress
of terrestrial weeds.
Terrestrial plants can be either annual or perennial.
Annual plants undergo a complete life cycle
(germination, flowering, and death) within a year, and
rely solely upon the annual production of seeds or soil
seed stores to persist. Alternately, perennial plants live
for more than one year and generally rely on their root
systems to sustain the growth of the plant foliage.
Annual weeds are particularly susceptible to control
methods that prevent the plants from successfully
flowering, as this reduces the seed bank required to
re-establish the plants in the following year. Strategies
that can be used to prevent flowering, include physical
removal (hand pulling, grubbing), slashing, and chemical
control.
Similar control methods may also be used for perennial
weeds, which do not rely solely upon the availability of
seed to persist. If perennial weeds are physically
removed, care must be taken to ensure that the entire
root system is removed, as it is possible for the plant to
re-establish from the remaining root fragments. This
particularly applies to perennial grass species, which are
characterised by rhizomatous root systems that enable
the plants to rapidly spread and establish daughter
plants.
Physical removal methods are generally suitable for
isolated plants or small infestations; however chemical
control methods may be necessary for large weed
infestations or when woody weeds such as shrubs
and trees are present.
Foliar spray and rope-wick application of herbicides
are generally suitable for the control of herbs and
small shrubs, whereas cut stump and stem injection
are effective techniques for applying herbicides to large
shrubs and trees. Consideration should also be given to
the strategic use of selective herbicides for the removal
of weeds. For example, grass-specific herbicides can be
used to remove Kikuyu from among native grasses, with
minimal damage to the native vegetation.
72 Maintaining Vegetated Stormwater Assets Version 1
Page 101
Broad-leaved paspalum (Paspalum
mandiocanum, Syn. Paspalum wettsteinii)
Perennial grass that is weakly clumped, grows
to 1 m tall with spreading leaf blades to 3 cm
wide. Seed head to 12 cm long and with 3–10
branches (racemes).
Paspalum mandiocanum is a highly invasive
plant that prefers moist soils and is shade
tolerant.
Flowering: Mostly summer
Reproduction: Seed and vegetatively via
rhizomes (runners)
Control: Physical removal, chemical control
Seedlings and small plants are most
effectively removed by hand; however, large
infestations will require the use of herbicides.
Photo: Jason Sonneman, DesignFlow
Guinea grass (Panicum maximum)
Tufted perennial grass that grows to 2.5 m
tall, with elongated leave blades (to 3.5 cm
wide) tapering to a long fine point and a
rhizomatous root system. Leaves hairy or
hairless. Open seed head (panicle) to 60 cm
long, with numerous branches.
Distinguished by short stout rhizome with
hairy scale-like leaves and the whorled (group
from the same point on the stem) panicle
branches.
Three varieties are naturalised in Queensland
and they now are widespread and common on
roadsides, stream banks, and cleared land.
Flowering: Most of year
Photo: Geoff Sainty
Reproduction: Spreads by seed and slowly
from rhizomes and plants rooting from the
nodes
Control: Physical removal, chemical control
Maintaining Vegetated Stormwater Assets Version 1 73
The text continues on page 102.