Original source · versioned page text
2021-01-18 GC - Item 3 - Attachment 2 - Phase 7 Project Summary Coastal Hazards Adaptation Plan
Text sections have not been matched to the original PDF pages. Use the original document to check page numbers.
Plans and drawings
This document appears to be plans or drawings. Its page text below holds only the words printed on the drawings, without the drawings themselves, so it may be jumbled or hard to follow. To see the plans as drawn, choose Original above or download the file (both need you to log in).
Log in to see the plans as drawn General Committee Agenda
18 January 2021
Attachment 2 to Item 3
Noosa Shire Council Coastal
Hazard Adaptation Plan: Project
Summary
Date: December 2020
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
Large file: the download may take up to a minute.
Searchable page text hides email addresses. Original files are unchanged and may show email addresses.
Full text of sections 2 to 62 (of 98)
Section 2
Document Control Sheet
Document: R.B22613.005.02.Phase 7.docx
BMT Commercial Australia Pty Ltd
Level 8, 200 Creek Street Title: Noosa Shire Council Coastal Hazard
Brisbane Qld 4000 Adaptation Plan: Project Summary
Australia
PO Box 203, Spring Hill 4004 Project Manager: Lisa McKinnon
Tel: +61 7 3831 6744 Author: Lisa McKinnon
Fax: + 61 7 3832 3627
Client: Noosa Shire Council
ABN 54 010 830 421
Client Contact: Grant Hinner
www.bmt.org
Client Reference:
Synopsis:
REVISION/CHECKING HISTORY
Revision Number Date Checked by Issued by
0 24 June 2020 KOJ LCM
1 4 August 2020
2 11 August 2020
DISTRIBUTION
Destination Revision
0 1 2 3 4 5 6 7 8 9 10
Noosa Shire Council Word PDF PDF
BMT File Word PDF PDF
BMT Library PDF PDF
Copyright and non-disclosure notice
The contents and layout of this report are subject to copyright owned by BMT Commercial Australia Pty Ltd (BMT CA) save to the extent
that copyright has been legally assigned by us to another party or is used by BMT CA under licence. To the extent that we own the
copyright in this report, it may not be copied or used without our prior written agreement for any purpose other than the purpose
indicated in this report.
The methodology (if any) contained in this report is provided to you in confidence and must not be disclosed or copied to third parties
without the prior written agreement of BMT CA. Disclosure of that information may constitute an actionable breach of confidence or may
otherwise prejudice our commercial interests. Any third party who obtains access to this report by any means will, in any event, be
subject to the Third Party Disclaimer set out below.
Third Party Disclaimer
Any disclosure of this report to a third party is subject to this disclaimer. The report was prepared by BMT CA at the instruction of, and
for use by, our client named on this Document Control Sheet. It does not in any way constitute advice to any third party who is able to
access it by any means. BMT CA excludes to the fullest extent lawfully permitted all liability whatsoever for any loss or damage
howsoever arising from reliance on the contents of this report.
Commercial terms
BMT requests the ability to discuss and negotiate in good faith the terms and conditions of the proposed terms of engagement, to
facilitate successful project outcomes, to adequately protect both parties and to accord with normal contracting practice for
engagements of this type.
Section 3
Noosa Shire Council Coastal Hazard Adaptation Plan: Project Summary i Executive Summary Executive Summary To help the Noosa Shire adapt to potential effects of climate change over time, Noosa Council is responding to potential climate change risks by undertaking a multi-year project to develop a Climate Change Adaptation Plan (CCAP) to build adaptive capacity within Council and across the community. The coastal hazards component of the CCAP will be informed by the development of a Coastal Hazards Adaptation Plan (CHAP). The CHAP is funded by a grant agreement with the Local Government Association of Queensland (LGAQ), under the Queensland Department of Environment and Science (DES) QCoast2100 initiative. This report provides a summary of the outcomes of Phases 2-7, for which BMT have responsibility. Work on the CHAP commenced in April 2017, and has progressed over that time in stages, with input from community consultation and Council staff at critical points as technical studies were progressed. The methodology for each phase has closely followed the guidance provided within the MS & G which sets out minimum standards to be achieved by each Council. A separate technical report has been produced and approved by Council and LGAQ at the end of each phase. Noosa faces impacts from a range of coastal hazards, particularly towards the latter half of the century. In some locations hazards are being experienced in such a way as to already represent a material risk. A risk assessment identified that without mitigation, increased coastal erosion is likely for the open coast region, having a high impact particularly on privately-owned assets, as well as Council coastal infrastructure (e.g. roads and recreational areas) and the beaches themselves. Areas along the Noosa River (Noosa Heads, Tewantin, and in particular Noosaville and Noosa North Shore) will be increasingly at risk due to inundation associated with rising sea levels. In this instance, the greatest level of exposure and impacts are expected to be felt by Council infrastructure (e.g. stormwater networks, open space, roads), some private property, as well as indirect consequences for adjacent retail and commercial operations. The feedback received during public consultation throughout the project thus far has been for Council to focus on less intrusive solutions to minimising these potential risks such as nature-based solutions (i.e. beach management and dune augmentation) on the open coast, rather than hard (less reversible) interventions such as seawalls. This was borne out by both the options assessment (Phase 6) and more detailed Cost-Benefit Analysis (Phase 7), particularly for the open coast areas which favoured ‘lighter touch’ options. For areas subject to inundation hazards, in built-up areas with significant public assets, levees and infrastructure upgrades are preferred over the long term. The study also found that planning controls may also be used to support nature-based solutions, and thus could be included in a suite of complementary measures that are consistent with the feedback received. A summary of the recommended coastal hazard mitigation measures for consideration in the Coastal Hazards Adaptation Plan is provided below.
Section 4
Noosa Shire Council Coastal Hazard Adaptation Plan: Project Summary ii
Executive Summary
Locality Recommended Adaptation Options Recommended Adaptation Hierarchy
Approach
Peregian to Active dune and habitat management Accommodate (short term)
Sunshine Beaches Manual creek mouth management Planned transition (long term)
Community infrastructure management
Land buy back
Relocate important infrastructure
Beach nourishment
Dune augmentation
Noosa Heads Design of hazard resilient infrastructure Accommodate
Tide flaps and valves on stormwater
pipe network
Active dune and habitat management
Dune augmentation
Improve sand shifter efficiency
Teewah Active dune and habitat management Accommodate
Acquisition of properties affected by
coastal erosion in 2070, and conversion
of affected properties to public open
spaces
Beach nourishment
Dune augmentation
Noosaville Design of hazard resilient infrastructure Accommodate
Tide flaps and valves on stormwater
pipe network
Raising road levels
Levees
Tewantin Design of hazard resilient infrastructure Prepare/Accommodate
Tide flaps and valves on stormwater
pipe network
Noosa North Shore Design of hazard resilient infrastructure Avoid/Prepare
Reduce intensity of future development
Lake Cootharaba Design of hazard resilient infrastructure Prepare
Relocate important infrastructure
Land management to support habitat
migration
Section 5
Noosa Shire Council Coastal Hazard Adaptation Plan: Project Summary iii
Contents
Contents
Executive Summary i
1 Introduction 1
1.1 Noosa Council Climate Change Adaptation Plan 1
1.2 QCoast2100 Program 1
2 Methodology 3
2.1 Consultation 3
2.1.1 Risk Workshops, 2017 3
2.1.2 Community Pop Ups and Questionnaires, 2017 3
2.1.3 Adaptation Workshop, 2018 3
2.2 Technical studies 4
2.2.1 Phase 2: Scoping 4
2.2.2 Phase 3: Hazard Mapping 4
2.2.2.1 Storm Tide 5
2.2.2.2 Erosion Prone Areas 5
2.2.2.3 Permanent Sea Level Rise 6
2.2.3 Phase 4: Asset Prioritisation 7
2.2.4 Phase 5: Risk Assessment 8
2.2.5 Phase 6: Options Assessment 13
2.2.6 Phase 7: Socioeconomic Appraisal 14
2.2.6.1 Eastern Beaches 16
2.2.6.2 Noosaville 16
3 Findings 17
3.1 Phase 2: Scoping 17
3.1.1 Setting the Scope 17
3.1.1.1 Sea Level Rise 17
3.1.1.2 Storm Tide Hazard 17
3.1.1.3 Erosion Prone Areas 17
3.1.2 Preliminary Risk Screening 17
3.1.3 Gap Analysis 18
3.2 Phase 3: Hazard Mapping 18
3.2.1 Erosion Hazard Areas 18
3.2.2 Permanent Sea Level Rise 19
3.3 Phase 4: Asset Prioritisation 19
3.4 Phase 5: Risk Assessment 19
Section 6
Noosa Shire Council Coastal Hazard Adaptation Plan: Project Summary iv
Contents
3.4.1 Open Coast 19
3.4.2 Noosa Heads 20
3.4.3 Noosaville 21
3.4.4 Tewantin 23
3.4.5 Noosa North Shore 23
3.4.6 Lake Weyba and Surrounds 24
3.4.7 Lake Cooribah, Lake Cootharaba and Surrounds 24
3.4.8 Summary 24
3.5 Phase 6: Options Assessment 26
3.5.1 Eastern Beaches (Peregian to Sunshine Beach) 26
3.5.2 Teewah 27
3.5.3 Noosa Heads (Erosion) 27
3.5.4 Noosa Heads (Inundation) 27
3.5.5 Noosaville 28
3.5.6 Tewantin 28
3.5.7 Noosa North Shore 28
3.5.8 Lake Cootharaba 29
3.5.9 Summary 29
3.6 Phase 7: Socio-economic Appraisal 30
3.6.1 Open Coast Locations 30
3.6.2 Noosaville 31
4 Conclusions and Recommendations 32
4.1 Additional considerations 33
Appendix A Hazard Mapping A-1
Appendix B Detailed Risk Assessment B-1
List of Figures
Figure 1-1 QCoast2100 Phases 2
Figure 2-1 Hierarchy of preferred coastal management responses for areas vulnerable to
coastal hazards (Noosa Environment Strategy 2019) 13
Figure 2-2 Conceptual CBA Model for open beaches 15
Figure 2-3 Conceptual Model for Noosaville CBA 16
Figure 3-1 Open Beaches Net Present Value (Source: Aither Economics, 2020) 31
Section 7
Noosa Shire Council Coastal Hazard Adaptation Plan: Project Summary v
Contents
List of Tables
Table 2-1 Summary of CHAP Storm Tide Hazard Mapping Approach 5
Table 2-2 Permanent inundation due to Sea Level Rise mapping assumptions 7
Table 2-3 Hazard Scenarios assessed 8
Table 2-4 Likelihood Criteria 9
Table 2-5 Consequence Criteria 10
Table 2-6 Risk Categories 13
Table 2-7 Risk Tolerance Scale 13
Table 2-8 MCA Assessment Criteria 14
Table 3-1 Summary of High and Very High assets at risk from present and future coastal
hazards 24
Table 3-2 Summary of Preferred Adaptation Options 29
Table 3-3 Present Value Results, Noosaville (Source: Aither Economics, 2020) 31
Section 8
Noosa Shire Council Coastal Hazard Adaptation Plan: Project Summary 1
Introduction
1 Introduction
1.1 Noosa Council Climate Change Adaptation Plan
To help the Noosa Shire adapt to potential effects of climate change over time, Noosa Council is
responding to potential climate change risks by undertaking a multi-year project to develop a Climate
Change Adaptation Plan (CCAP) to build adaptive capacity within Council and across the community.
The core objectives for the CCAP are to:
• Improve Noosa Council and the community’s understanding of current & future risks from coastal
hazards and how they might change through time as a result of climate change;
• Consult with the community clearly and sensitively throughout key stages of the project so the
community understands the implications and contributes to the decision making;
• Identify what actions are required to avoid, reduce or adapt to these risks to people, property,
assets and the environment;
• Provide mapping & visual products and deliverables that are useful for a range of purposes across
Council departments and functions and within the community (e.g. planning scheme, asset
management, community awareness, disaster management and financial planning); and
• Provide direction for a coordinated approach for Council and the community to adapt to climate
change and coastal hazards.
The coastal hazards component of the CCAP will be informed by the development of a Coastal
Hazards Adaptation Plan (CHAP). The CHAP is funded by a grant agreement with the Local
Government Association of Queensland (LGAQ), under the Queensland Department of Environment
and Science (DES) QCoast2100 initiative.
1.2 QCoast2100 Program
The QCoast2100 program is governed by a Board comprising members from the LGAQ, DES and
Department of State Development, Manufacturing, Infrastructure and Planning (DSDMIP). The
program has been designed to assist Queensland coastal local governments with funding and
technical support to progress the preparation of plans and strategies to address climate change
related coastal hazard risks. The program is intended to guide decision-making across key areas of
local government planning and operations, including:
• Corporate and operational planning and financial planning;
• Land use planning and development assessment;
• Infrastructure planning and management including roads, stormwater and foreshores;
• Asset management and planning including nature conservation, recreation, cultural heritage
values and other public amenities;
• Community planning; and
• Emergency management.
Section 9
Noosa Shire Council Coastal Hazard Adaptation Plan: Project Summary 2
Introduction
The QCoast2100 Minimum Standards & Guidelines (MS&G) provide guidance to local government
wishing to prepare a CHAP. The guidelines set minimum requirements that are to be included in a
CHAP as well as providing information on leading practices to facilitate continuous improvement.
The minimum standards set a benchmark for undertaking such studies in Queensland so that coastal
hazard adaptation decision-making is approached in a consistent and systematic manner. The
MS&G are structured to address the key phases of a CHAP which are illustrated in Figure 1-1.
Figure 1-1 QCoast2100 Phases
BMT have been engaged to complete Phases 2-7 of the QCoast2100 phases with their partners Ethos
Urban (planners) and Aither (economists). Noosa Council are responsible for the completion of
Phases 1 and 8, as well as leading inputs for Phase 4. This report provides a summary of the
outcomes of Phases 2-7, for which BMT have responsibility.
Section 10
Noosa Shire Council Coastal Hazard Adaptation Plan: Project Summary 3
Methodology
2 Methodology
Work on the CHAP commenced in April 2017, and has progressed over that time in stages, with
input from community consultation and Council staff at critical points as technical studies were
progressed.
The methodology for each phase has closely followed the guidance provided within the MS & G
which sets out minimum standards to be achieved by each Council. A separate technical report has
been produced and approved by Council and LGAQ at the end of each phase.
2.1 Consultation
2.1.1 Risk Workshops, 2017
Consultation both internally and externally has informed the development of the CHAP at various
stages.
An initial risk workshop was held in September 2017, and was attended by council officers from a
wide variety of council departments as well as a number of key stakeholders which included:
• Noosa Residents & Ratepayers Association
• Noosa District Landcare
• Noosa Chamber of Commerce
• Unitywater
• Tourism Noosa.
Attendees were asked to rate the risk to a number of community and council assets, based on the
hazard mapping and risk criteria. This workshop helped to develop assessment criteria and also gain
a feeling for Council and community members tolerance for coastal hazards, as well as mitigation
options.
2.1.2 Community Pop Ups and Questionnaires, 2017
It was also determined following the September 2017 workshop that some broader community
consultation was required to ensure that community asset values had been captured and their
tolerance for different risks was understood. A questionnaire regarding these issues was developed
and community responses and their tolerance for impacts/loss of service were incorporated into risk
scoring (see consequence criteria in (Table 2-5). These were captured by staff at a number of ‘pop
ups’ at coastal locations e.g. Sunshine Beach, Noosaville. The community were also able to view
hazard maps.
2.1.3 Adaptation Workshop, 2018
A Community Adaptation Options Workshop was held in December 2018 to inform the preparation
of the risk management and adaptation planning process to better plan and manage coastal risks
by:
Section 11
Noosa Shire Council Coastal Hazard Adaptation Plan: Project Summary 4
Methodology
• Capturing critical input from community members, including valued asset identification, risk
assessment, options analysis and adaptation pathway development;
• Identifying the current level of community awareness of possible adaptation responses, including
understanding the range of options and the implications and effectiveness associated with each;
and
• Recognising the community’s values and priorities with regard to adaptation and resilience;
potential gaps in responses to climate change risks in current Council planning; and new
pathways for creating a resilient Noosa not previously considered.
Key outcomes from the workshop relating to adaptation options were:
• There was generally community acceptance of Council’s preference to use ecosystem-based
options, such as soft landscaping or sand nourishment.
• Beach nourishment and sand dune protection needs to be a priority. Pedestrian and vehicle
access must also be appropriately managed to reduce erosion rates of dunes.
• Public assets and road infrastructure represent crucial access points for some residents and must
be upgraded and maintained.
• More information needs to be provided to the community regarding beach erosion rates and sea
level rise (SLR) data.
• Some understanding that commercial business may need to relocate/ retreat if the stability of the
area becomes uncertain.
• General level of acceptance for the inundation hazards. Participants are aware of existing
inundation/flooding and accepted that the extent of these impacts would increase/worsen.
In addition to the options discussed with and flagged by community stakeholders, additional options
were sourced from published literature such as the coastal hazard adaptation options Compendium
(Griffith University Centre for Coastal Management and GHD, 2012) and professional experience.
2.2 Technical studies
2.2.1 Phase 2: Scoping
An initial scoping assessment was undertaken to review existing information relevant to the Noosa
CHAP and identify the necessary studies to address key knowledge gaps, identify any further studies
required to support the CHAP and establish a basis for future risk assessment. The State defined
hazard areas were then used as the basis for a preliminary risk screening assessment of property
potentially exposed to coastal hazards by the year 2100.
2.2.2 Phase 3: Hazard Mapping
Detailed maps of each coastal hazard for the Noosa region were developed, taking into account
predicted climate change for the present-day, 2040, 2070 and 2100 planning horizons i.e. erosion
prone areas, areas subject to temporary storm tide inundation and areas subject to permanent sea
level rise.
Section 12
Noosa Shire Council Coastal Hazard Adaptation Plan: Project Summary 5
Methodology
2.2.2.1 Storm Tide
Storm tide hazard areas were developed using a combination of existing information and inundation
modelling tools (Aurecon 2013; WMA Water 2017a; WMA Water 2017b), as identified in Table 2-1.
For land adjacent to the lower Noosa River both inundation depth and velocity hazard information
were determined.
Table 2-1 Summary of CHAP Storm Tide Hazard Mapping Approach
Mapping product Present-day 2040 2070 2100
Open coast storm Developed Developed Developed Developed
tide inundation using present- using present- using present- using 2100
day open coast day open coast day open coast open coast
levels reported levels + 0.2 m levels + 0.5 m levels reported
by Aurecon SLR reported SLR reported by Aurecon
(2013) and by Aurecon by Aurecon (2013) (which
bathtub (2013) and (2013) and included 0.8m
mapping bathtub bathtub SLR) and
mapping mapping bathtub
mapping
Lower Noosa River Previously Developed Developed Previously
catchment storm tide completed by using existing using existing completed by
inundation Aurecon (2013) TUFLOW model TUFLOW model Aurecon (2013)
+ 0.2 m SLR + 0.5 m SLR (which included
boundary boundary 0.8m SLR)
condition condition
adjustments adjustments
Coincident Noosa Previously Previously Previously Previously
River flooding and completed by completed by completed by completed by
storm tide conditions (WMA Water, (WMA Water, (WMA Water, (WMA Water,
2017a) 2017b) 2017b) 2017a)
2.2.2.2 Erosion Prone Areas
The State Erosion Prone Area plans have been developed by the Queensland Government to assist
development assessment and to inform the preparation of planning instruments, such as planning
schemes and regional plans under the Planning Act 2016.
Erosion Prone Areas (EPA) have been declared for all coastal local government areas in
Queensland.
The EPAs apply to land subject to inundation by the Highest Astronomical Tide (HAT) by the year
2100 or at risk from sea erosion. On land adjacent to tidal water the EPA is defined by whichever of
the following methods gives the greatest width:
(1) 40 m buffer from the present-day HAT contour
(2) Calculated erosion distance
(3) Permanent inundation due to SLR in 2100 (defined by present-day HAT plus 0.8 m).
The EPAs determined by the State define a hazard extent at a single specified planning horizon (the
year 2100) and probability (representative 100-year ARI). The State-defined erosion prone areas are
therefore useful for ‘first-pass risk screening’ however do not provide sufficient information regarding
Section 13
Noosa Shire Council Coastal Hazard Adaptation Plan: Project Summary 6
Methodology
likelihood and consequence to undertake a more detailed risk assessment in accordance AS/NZS
ISO 31000:2009, the SPP or other State guideline documents (such as the QCoast2100 Minimum
Standards and Guidelines). A detailed remapping of erosion prone areas was undertaken by BMT,
in accordance with the Queensland Government Coastal Hazard Technical Guide (DEHP, 2013).
The potential coastal erosion hazard throughout the study area arises from a combination of:
• The physical processes that are causing (or threatening to cause) erosion;
• The assets and values potentially affected by the erosion; and
• The timeframe over which the threat may act upon the assets and values.
In order to assess the erosion hazard for the open coast beaches throughout the Noosa region, it is
necessary to understand which areas are presently within the short-term storm erosion zone and
areas that may become threatened in the future.
The erosion vulnerability zone should include the following components, consistent with the
Queensland Government Coastal Hazard Technical Guide (DEHP, 2013):
• Short term storm erosion;
• Continuation of the long-term historical shoreline position trend (if this can be identified);
• Cyclic morphological change observed at river and creek mouths (not a significant issue at this
location due to training of the southern shoreline of Noosa River); and
• Additional future effects of climate change induced sea level rise.
2.2.2.3 Permanent Sea Level Rise
The State EPA mapping defines permanent tidal inundation due to sea level rise (SLR) at 2100 as:
• Present-day Highest Astronomical Tide (HAT) plus 0.8 m SLR.
The hazard area is then obtained by extrapolating the water level across land. Areas adjacent to tidal
waters where the ground elevation falls below the threshold water level are deemed to be within the
hazard area.
The SLR hazard information provided by the State is useful for ‘first-pass risk screening’ only and
does not provide sufficient information regarding likelihood and consequence to undertake a more
detailed risk assessment. To address this issue, SLR hazard mapping including depth classification
was developed for the Noosa CHAP planning horizons. The adopted approach generally follows the
State definition, whereby a threshold water level (mAHD) is defined by consideration of HAT plus an
appropriate SLR allowance. The water level mapping assumptions are summarised in Table 2-2.
These thresholds for different locations throughout the study area consider Maritime Safety
Queensland published tidal planes (MSQ 2017) along the open coast and within the lower Noosa
River. Linear interpolation 1 of the water level between the sites has been adopted with the Munna
Point and Tewantin levels extending into Lake Cooroibah/Cootharaba and Lake Weyba respectively.
1
Hydralogic, Future Tidal Inundation Mapping for Noosa River, 2018
Section 14
Noosa Shire Council Coastal Hazard Adaptation Plan: Project Summary 7
Methodology
Table 2-2 Permanent inundation due to Sea Level Rise mapping assumptions
Planning SLR Noosa Lake Tewantin Lake Cootharaba
Horizon allowance Heads HAT Weyba HAT (mAHD) HAT (mAHD)
(m) (mAHD) HAT
(mAHD)
Present-day 0 1.16 0.5 0.91 0.2
2040 0.2 1.36 0.7 1.11 0.4
2070 0.5 1.66 1.0 1.41 0.7
2100 0.8 1.96 1.3 1.71 1.0
2.2.3 Phase 4: Asset Prioritisation
In phase 4 of the CHAP, Noosa Shire Council have sought to:
• Identify and map assets – both tangible and intangible within the defined coastal hazard area;
• Identify and understand potential impacts to interdependent infrastructure systems;
• Estimate the underlying value – both economic and non-economic – of affected assets; and
• Prioritise assets for analysis as part of subsequent CHAP phases.
All identified assets were prioritised according to:
• Difficulty to replace an asset
• The cost of replacing an asset
• The value the community places on an asset
• The scarcity of an asset across the Shire
• The remaining design life of an asset i.e. a shorter design life may create opportunities for asset
replacement or responding to a changing risk profile easier
• The ability of an asset to withstand a hazard
• The criticality of an asset i.e. is an essential service in an emergency
• Biodiversity value
• The role the asset plays in Noosa’s economy i.e. fiscal contribution
• The aesthetic value of an asset.
Any assets that received a score greater than 4 (on a scale of 0-5) were identified as key assets and
have been included in the risk assessment. Asset types that are not considered ‘key assets’ on an
individual basis, but are when grouped (e.g. a given neighbourhood of private dwellings) have also
been included.
Section 15
Noosa Shire Council Coastal Hazard Adaptation Plan: Project Summary 8
Methodology
2.2.4 Phase 5: Risk Assessment
A risk management approach was applied to assessing coastal hazards and future management, as
required by the QCoast2100 Guidelines. The Australian Standard for identifying and managing risks is
outlined in ASNZS ISO 31000:2018 Standard Risk Management Principles and Guidelines. The use
of a risk-based approach to managing coastal hazards is a requirement of most state guidelines in
Australia and accords with current international best practice for natural resource management.
Council staff, key stakeholders and community members were involved in determining appropriate
risk assessment criteria and scoring identified risks.
Risk criteria and assessment frameworks were based on Noosa’s current risk assessment
framework, with input from stakeholders sought during a number of engagement activities.
The scenarios in Table 2-3 were assessed as part of the risk assessment.
Table 2-4 to 2-4 describe the risk criteria adopted for the Noosa CHAP.
Asset risks that were considered High or Very High are considered Intolerable and subject to further
assessment.
Table 2-3 Hazard Scenarios assessed
Hazard Planning Horizon/Event
Erosion Present Day
2040
2070
2100
Storm tide inundation Present Day (1 in 20yr, 1 in 100yr and 1 in 500yr Annual
Recurrence Intervals*)
2040 (1 in 20yr, 1 in 100yr and 1 in 500yr Annual
Recurrence Intervals)
2070 (1 in 20yr, 1 in 100yr and 1 in 500yr Annual
Recurrence Intervals)
2100 (1 in 20yr, 1 in 100yr and 1 in 500yr Annual
Recurrence Intervals)
Permanent Sea Level Rise 2040
2070
2100
* Annual Recurrence Interval is a way of explaining how frequent an event is, by comparing how often the event
has occurred in the past - once in every 20 years, once in every 100 years or once in every 500 years. A 1 in
500yrs event is considered very rare.
Section 16
Noosa Shire Council Coastal Hazard Adaptation Plan: Project Summary 9
Methodology
Table 2-4 Likelihood Criteria
Likelihood Description
Almost Certain There is a high possibility the event will occur as there is a history
of frequent occurrence. The event is expected to occur in most
circumstances
Likely It is likely the event will occur as there is a history of intermittent
occurrence. The event has occurred several times or more in the
past.
Possible The event has occurred at least once in the past and may occur
again.
Unlikely There is a low possibility that the event will occur, however, there
is a history of infrequent and isolated occurrence.
Rare It is highly unlikely that event will occur, except in
extreme/exceptional circumstances, which have not been
recorded historically.
Section 17
Noosa Shire Council Coastal Hazard Adaptation Plan: Project 10
Summary
Methodology
Table 2-5 Consequence Criteria
Consequence Community Environment Council
Social Economic Financial Other
Catastrophic Widespread permanent Cost to repair damage to Significant environmental impact One-off loss to Extensive impact on assets
impact to broader properties equal (or with long term effects. Examples Council operating requiring a significant
community’s services almost equal) to the include: budget of >$2M, or replacement or
wellbeing (including to aggregate of all impacted • Serious environmental harm >5% recurrent reconstruction effort. Total
private owned critical properties’ value, with (irreversible, high impact, reduction in branch loss of capability.
infrastructure), or culture widespread repair needed widespread, cases > $50,000 budget.
(e.g. >50% of to damaged properties damage). One or more major
community affected), or across the Noosa region,
• Immediate containment industries’ viability (e.g.
popular activity/use resulting in significant
required, extensive cleanup, tourism, agriculture,
disrupted permanently impairment of Noosa
extensive or ongoing education, construction,
e.g. foreshore parkland economy.
remediation needed. manufacturing, retail or
closed
• Major impact to a protected fishing) within Noosa region
Costs to repair damage to species or habitat greatly threatened.
non-Council owned critical contributing to or causing
infrastructure (excluding localised extinction risk in the A large number of
private properties) Noosa area, requiring long complaints resulting in
prohibitive leading to non- term recovery efforts (>40% negative attention from the
replacement, and/or loss of an ecosystem type, public.
disruption resulting in >40% loss of a species,
significant impairment of locally)
Noosa economy.
Major Major permanent or Major repairs needed to Significant medium to long term Recurrent reduction Major impact on assets
widespread medium damaged properties impact on natural or built in Council operating requiring a programmed
term (somewhat within a section of the environment. budget of $0.5M to repair/replacement
reversible) disruption to community, with cost to Examples include: $1M or $1m to $2M response.
community’s services repair damage to one off loss or 3-
(including to private properties greater than • Material environmental harm 5% of recurrent
(significant effect and extent, A major industry or whole
owned critical 50% of the aggregate reduction in branch
causes $20,001 to $50,000 sector of Noosa economy
infrastructure), property value. budget.
damage). put at risk
wellbeing, or culture
(e.g. up to 50% of • Immediate containment Potential for a large number
Damage costs to non- required, large clean up, of complaints resulting in
community affected or
Council owned critical significant remediation negative attention from the
popular activity/use
infrastructure (excluding required. public.
Section 18
Noosa Shire Council Coastal Hazard Adaptation Plan: Project 11
Summary
Methodology
Consequence Community Environment Council
Social Economic Financial Other
disrupted for up to a private properties) greater • Serious impact to a protected
year. than 50% of full species or habitat
replacement value. significantly contributing to
local shire extinction
pressures, requiring medium
to long term recovery efforts
(5-40% loss of an ecosystem
type, 5-40% loss of a
species, locally).
Moderate Minor long term or major Some repairs needed to a Medium term effects on Recurrent reduction Some impacts on assets
short term (mostly number of properties, with environment from single in Council operating damaged with programmed
reversible) disruption to cost to repair damage to incident. Examples include: budget of $250k to response, isolated loss of
community’s services properties between 20- • Material environmental harm $500k or one off capability.
(including to private 50% of the aggregate (significant effect and extent, loss of up to $1M or
owned critical property value causes $5,001 - $20,000 1-2% recurrent
Group of businesses in one
infrastructure), damage. reduction in branch
sector or locally within the
wellbeing, or culture budget.
Damage costs to non- • Immediate containment Noosa region put at risk.
(e.g. up to 25% of
Council owned critical required, medium cleanup,
community affected or
infrastructure (excluding some remediation required.
regularly used Potential for a number of
private properties) 25- • Impact to a protected species
activity/use disrupted for complaints resulting in
50% of full replacement or habitat, requiring short
between 3-6 months e.g. negative attention from the
value. term recovery efforts (in the
sandy beach takes 3-6 public.
months to recover) immediate area). (<5% loss
of an ecosystem type, <5%
loss of a species, locally).
Minor Small to medium term Minor repairs needed to a Short term effect on built or Recurrent reduction Minor impact on assets
(reversible) disruption to small number of natural environment easily in Council operating managed with minimal
community’s services properties, with cost to remedied. Examples include: budget of $100K to efforts. Some restrictions
(including to private repair damage to • Minor short-term impact, $250K or one of apply.
owned critical properties less than 2% of almost no effect, potentially loss of up to $500k
infrastructure), the aggregate property cumulative if not cleaned up, or 1-2% recurrent
Inconvenience to a group of
wellbeing, finances or value. reversible. businesses within one
culture (e.g. up to 10%
Section 19
Noosa Shire Council Coastal Hazard Adaptation Plan: Project 12
Summary
Methodology
Consequence Community Environment Council
Social Economic Financial Other
of community affected or • Environmental nuisance. reduction in branch sector or locally within the
activity/use experiences Damage costs to non- • Containment required, minor budget Noosa region.
minor disruption for a Council owned critical cleanup, no remediation
few weeks. infrastructure (excluding required. Potential for a limited
private properties) less • Minor impacts on protected number of complaints
than 25% of full species or habitat, no resulting in negative
replacement value. recovery efforts required. attention from the public.
Insignificant Very small short term Minimal or no repairs Minimal very short term, Recurrent reduction Minimal or no impact to
disruption to needed to a very small temporary effects on habitat or in Council operating assets, which can be dealt
community’s services number of properties with species with recovery assured. budget of <$100k with through routine
(including to private minimal repair costs. or one of loss of maintenance.
owned critical less than $250K or Minimal or no impact to a
infrastructure), <1% recurrent single business within the
Damage costs to non-
wellbeing, finances or reduction in branch Noosa region.
Council owned critical
culture (e.g. up to 5% of budget
infrastructure (excluding
community affected or
private properties) less Zero or a few complaints
activity/use experiences
than 5% of full asset resulting in negative
minor disruption for a
replacement value. attention from the public.
few weeks.
Section 20
Noosa Shire Council Coastal Hazard Adaptation Plan: Project Summary 13
Methodology
Table 2-6 Risk Categories
LIKELIHOOD CONSEQUENCE
Insignificant Minor Moderate Major Catastrophic
Almost Certain Low Medium High Very High Very High
Likely Low Medium High High Very High
Possible Low Medium Medium High Very High
Unlikely Low Low Medium High Very High
Rare Low Low Low Medium High
Table 2-7 Risk Tolerance Scale
Risk Level Action Required Tolerance
High/Very High Immediate Action required to eliminate Intolerable
or plan to reduce the risk, or accept the
risk.
Medium Reduce the risk over time, or further Tolerable
investigate the risk.
Low Accept the risk; manageable through Acceptable
existing processes or coastal hazard
management actions.
2.2.5 Phase 6: Options Assessment
There are numerous adaptation options that may be considered for mitigating risks from coastal
hazards in the Noosa area. The adaptation option hierarchy adopted for the CHAP generally aligns
with that adopted for the Noosa Environment Strategy (2019), which is shown in Figure 2-1.
Measures are implemented to ensure a 'no
worsening' of risks as a result of
AVOID development, infrastructure works or other
decisions.
Improve coastal hazard preparedness and
PREPARE information sharing to enhance community
safety, health and wellbeing.
ACCOMMODATE Mitigate risks to an acceptable level through
careful design and location.
PLANNED TRANSITION Reposition built structures away from
hazard areas where feasible.
Figure 2-1 Hierarchy of preferred coastal management responses for areas vulnerable to
coastal hazards (Noosa Environment Strategy 2019)
Section 21
Noosa Shire Council Coastal Hazard Adaptation Plan: Project Summary 14
Methodology
The QCoast2100 Guidelines require Councils to develop criteria for ranking, or prioritising adaptation
options. For the Noosa CHAP, a Multi-criteria Analysis (MCA) process was applied to potential
adaptation mitigation options for locations where risks were assessed as High to Very High in the
Phase 5 risk assessment. Identified options were chosen from a long list of available coastal hazard
mitigation options, similar to the Coastal Hazard Adaptation Options: A Compendium for Queensland
Coastal Councils (Griffith University, 2012), as recommended in the MS & G Guidelines.
The MCA criteria and their weightings are shown in Table 2-8.
Table 2-8 MCA Assessment Criteria
Criteria Criteria Description Weighting
Order of magnitude monetary costs to build/implement an
Cost adaptation option (further detailed studies to confirm costs would 20%
be required), either by Council or private land owners
Whether an adaptation option will have adverse impacts on
Environmental
environmental values e.g. Matters of State Environmental 20%
Impact
Significance
Whether an adaptation option will have adverse impacts on other
Social Impact social values or is likely to have community support e.g. access, 15%
amenity, property values
Reversible/ Whether an option is able to be ‘reversed’ or adapted to cater for
10%
adaptable future needs
Whether an option is technically feasible (i.e. is effective in
mitigating the risk and is implementable)
Whether an option is able to be readily approved (i.e. is
Effectiveness 35%
consistent with current planning policy or legislative requirements)
Whether an option provides a long-term solution to the coastal
hazard risk, or is suitable for use as an interim option
A “traffic light” system was used to group the options for further consideration as follows:
• “GO”: an option is considered suitable with no other adverse impacts, and requires no further
development (i.e. studies, design etc). These could also be defined as “No Regrets” options.
• “SLOW”: an option may be suitable, but should be subject to further detailed assessment at
specific locations i.e. Cost Benefit Analysis.
• “STOP”: an option is not considered suitable at a location and may not be considered for further
detailed analysis.
The weighting applied was determined by Council officers; no sensitivity analysis was undertaken.
2.2.6 Phase 7: Socioeconomic Appraisal
A Cost-Benefit Analysis (CBA) was performed by Aither on two regions within the Noosa region; the
open coast and Noosaville. The aim of this socio-economic analysis was to assist council in
understanding the merit of different coastal hazard mitigation options, particularly those that have
significant ongoing implications in terms of economic or community impact (usually those options
identified as requiring further assessment in the previous Phase (i.e. “slow” options).
Section 22
Noosa Shire Council Coastal Hazard Adaptation Plan: Project Summary 15
Methodology
CBA is the most common form of economic evaluation used to inform the merit of a proposed
investment, whether for public or private projects. It incorporates the value that people place on all
financial, social and environmental outcomes. The analysis undertaken for this project followed the
approach set out in the Queensland Governments Project Assessment Framework (PAF)
(Queensland Treasury, 2015).
The key decision-metric output of CBA is the Net Present Value (NPV), which measures the present
value of net benefits. It is calculated as the present value of all benefits minus the present value of
all capital and recurrent costs within the appraisal period for the project. Figure 2-2 shows the
conceptual model used for the open beaches and Figure 2-3 shows the Noosaville Model.
Figure 2-2 Conceptual CBA Model for open beaches
Section 23
Noosa Shire Council Coastal Hazard Adaptation Plan: Project Summary 16
Methodology
Figure 2-3 Conceptual Model for Noosaville CBA
2.2.6.1 Eastern Beaches
A total of seven different mitigation options were explored:
• Option 1 (Base case): no adaptation actions undertaken
• Option 2: Dune revegetation and management
• Option 3: Dune revegetation, augmentation and management
• Option 4: Construction of seawalls in high risk locations
• Option 5: Acquisition of properties affected by coastal erosion in 2070, and conversion of affected
properties to public open spaces
• Option 6: Option 5 with a 15-year leaseback of properties prior to conversion to public open
spaces
• Option 7: Changes to planning regulations to prevent development seaward of the 2070 coastal
erosion line.
The socio-economic analysis investigated the effects of coastal erosion between 2020 and 2100.
2.2.6.2 Noosaville
• The CBA for Noosaville investigated mitigation options for rising sea levels between 2020 and
2100. Two options were explored: Option 1: Protect - Levees and stormwater infrastructure
modifications (i.e. installing tide gates to prevent egress into the stormwater network)
• Option 2: Accommodate - Road raising.
Section 24
Noosa Shire Council Coastal Hazard Adaptation Plan: Project Summary 17
Findings
3 Findings
3.1 Phase 2: Scoping
3.1.1 Setting the Scope
An assessment of the previous work relevant to the Noosa CHAP was undertaken to set the scope
for subsequent phases. As a result of this scoping study, the following key parameters were set:
3.1.1.1 Sea Level Rise
The Noosa CHAP adopted the following sea level rise allowances (relatively mean sea level in 1990):
• 2040: 0.2 m
• 2070: 0.5 m
• 2100: 0.8 m.
These allowances were based on consideration of the following key studies:
• IPCC suggest global mean increases to sea level of approximately 0.3 m by 2050 and 0.8 m by
2100.
• DOE, CSIRO & BOM suggest regional mean increases to sea level of approximately 0.14 m by
2030 and 0.65 m by 2090.
• Analysis of east coast Australia tide gauge data suggests 3 mm/year increase in mean sea level
(CSIRO/ARE CRC, 2012; Wainwright and Lord, 2014).
• State planning policy and guidelines recommend 0.8 m by 2100.
3.1.1.2 Storm Tide Hazard
The Noosa CHAP adopted present-day design water levels reported by Aurecon (2013) which
incorporate results and recommendations of the NDRP Storm Tide Hazard Interpolation Study (GHD,
2014). This information will be used in conjunction with sea level rise allowances summarised above.
3.1.1.3 Erosion Prone Areas
The erosion prone areas determined by the State did not provide sufficient information regarding
likelihood and consequence to undertake a more detailed risk assessment required by the CHAP. It
was determined that a further erosion assessment would be required.
3.1.2 Preliminary Risk Screening
The preliminary risk screening identified the following:
• Total lots within the State declared Erosion Prone Area = 2,154
• Total lots within the State Storm Tide Medium Hazard Area = 2,421
• Total lots within the State Storm Tide High Hazard Area = 213.
Section 25
Noosa Shire Council Coastal Hazard Adaptation Plan: Project Summary 18
Findings
3.1.3 Gap Analysis
The scoping study identified that two pieces of further technical work would be required to support
the CHAP. These were:
• Development of storm tide hazard mapping for the CHAP planning horizons (present-day, 2040,
2070 and 2100); and
• Coastal erosion prone area assessment and mapping for the CHAP planning horizons.
3.2 Phase 3: Hazard Mapping
Hazard maps for the Noosa Council boundary are provided in Appendix A. The key findings of the
coastal hazard assessment were:
• Permanent inundation due to sea-level rise: the area subject to tidal inundation due to sea-level
rise is considered moderate in extent (i.e. relative to stormtide) across the study area and is
primarily constrained to areas of land adjacent to the Noosa River.
• Storm tide: due to the topography of the study area, the vast majority of locations subject to
inundation during the design storm tide event are located adjacent to the Noosa River.
Comparatively, only a small area of land in open coast areas would be exposed to storm tide
inundation.
• Erosion: the alongshore variation is primarily due to differences in the height and volume of the
coastal barrier and the nearshore slope. The short term erosion component and the natural
shoreline response to sea-level rise account for approximately 30% and 35% of the defined 2100
erosion prone area, respectively.
A comparison was conducted of the modelled hazard extents for planning horizon 2100 for 1% AEP
storm tide and 1% AEP rainfall event, with both incorporating a projected relative sea-level rise
component of 0.8m. The comparison revealed that within the Noosa River estuary 1% AEP
catchment flooding is likely to be more severe than inundation during a 1% AEP storm tide event.
3.2.1 Erosion Hazard Areas
In line with the methodology described in Section 5, the extent of the erosion hazard areas were
mapped for open coast sections of the shoreline i.e. eastern beaches and Noosa Main Beach.
It should be noted that the calculated erosion distances do not account for local erosion controls,
such as the engineered coastal protection structures or erosion resistant bedrock slopes. Properly
designed and maintained seawalls are expected to limit the landward extent of the erosion. The
design standard of the Noosa Main Beach seawall, concealed within the sand dune, remains
uncertain. It has been assumed the existing structure may not withstand a design storm event but
would be sufficient to limit long term recession and the shoreline response to sea level rise. This
assumption has been incorporated to the coastal hazard mapping that was produced for Noosa Main
Beach.
Section 26
Noosa Shire Council Coastal Hazard Adaptation Plan: Project Summary 19
Findings
3.2.2 Permanent Sea Level Rise
The projected extent of inundation due to SLR is considered moderate across the Noosa region,
primarily exposing land adjacent to the lower Noosa River. Based on current forecasts, and in the
absence of an adaptation response, material impacts would be realised by 2070 and significantly
escalate by 2100.
3.3 Phase 4: Asset Prioritisation
A range of private and public assets within identified hazard areas were assessed according to the
prioritisation criteria. Those prioritised for further assessment include:
• Beaches
• Foreshore parklands and associated infrastructure
• Stormwater, wastewater, energy and water supply assets
• Emergency services assets e.g. rural fire brigade, ambulance, coastguard depots
• Transport infrastructure e.g. roads, bikeways etc.
• Marinas, boat ramps, jetties etc.
• Tourism facilities e.g. surf life-saving clubs, accommodation facilities
• Environmental assets (e.g. national parks, environmental reserves)
• Commercial properties/businesses
• Residential properties (multi-residential and detached dwellings), aggregated to the
neighbourhood level.
3.4 Phase 5: Risk Assessment
A risk assessment was performed on the priority assets identified in the Phase 4 report within each
Noosa locality. The risks described below (and summarised in Table 3-1) assume that there are no
risk mitigation measures applied (beyond those already in place e.g. sand nourishment at Main
Beach).
3.4.1 Open Coast
The primary coastal hazard faced by Noosa’s open coast zone is erosion risk; based on a single
occurrence of the modelled design storm event (100 ARI). This event has been given a likelihood
rating of ‘unlikely’. A 100 ARI storm event would be expected to occur, on average, once every 100
years, but could occur more or less frequently than once every 100 years and could occur during any
given year.
The open coast includes Peregian, Marcus, Castaways, Sunrise, Sunshine and Teewah Beaches
which provide a mix of multi-residential tourism and residential properties as well as local service
centres. These beaches are a drawcard for both visitors and locals for recreational purposes. The
open coast is relatively natural in appearance, with few coastal protection measures at present.
Existing erosion controls include maintaining vegetated dunes and the application of building coastal
Section 27
Noosa Shire Council Coastal Hazard Adaptation Plan: Project Summary 20
Findings
lines for some properties within the declared Erosion Prone Area. However the beach and significant
portions of the dunal foreshore are at risk from significant erosion in the present day for most areas,
with the remainder exposed by the year 2040.
Although there is a low likelihood of an erosion event occurring (i.e. could occur in 1 in 100 years),
should that erosion event occur, it would potentially impact private properties as early as 2040, with
a small number of properties (22) at Sunshine Beach have been rated as being at least High risk as
a result of erosion. By 2070, approximately 72 properties will be at High to Very High risk at Sunshine
and Sunrise beaches. By 2100, approximately 109 properties will be at High to Very High risk at
Sunshine and Sunrise Beaches. No private properties south of Sunrise Beach have been assigned
a High or Very High risk, with the highest being a Medium risk by 2100 for those assets south of
Peregian Park. Properties at Teewah are not expected to be at High risk from erosion until 2100,
with approximately 24 lots impacted (approximately 18 full lots).
Coastal access infrastructure (i.e. foreshore parklands, car parks, beach access stairs/pathways,
toilet blocks) within Peregian and Sunshine Beaches are assessed as being at High Risk from
erosion by 2070. This is based on both the loss of community access and facilities as well as the
potential cost to Council to maintain or replace this infrastructure. Impacts to other critical
infrastructure such as water and sewage, energy and lighting networks is rated as High to Very High
at a number of locations, between 2070 and 2100 due to the cost to replace if impacted as well as
the disruption to the community. Impacts to the Peregian Beach Surf Life Saving Club are also ranked
as a Very High risk by 2100, based on the potential loss of a community service and the cost to
repair should erosion cause damage to this facility. Potential impacts to the surrounding Peregian
Park are also rated as High by 2070 and Very High by 2100 because of the cost to replace existing
infrastructure should it be damaged from erosion e.g. playground, skate park etc. Similarly, Sunshine
Beach Surf Life Saving Club and the adjacent park is also rated as being at a Very High risk to
erosion by 2070.
As the major east coast access road, any loss of road access along David Low Way is of a significant
consequence for the community who utilise it to access their properties. Although there is a low
likelihood of an erosion event occurring, should it occur there is a potential for loss of access near
Burgess Creek, isolating homes in the Castaways residential area during an erosion event. This risk
is rated as Very High by 2040.
The Noosa North Shore campground – a Council-owned asset – is also rated as a High risk by 2070.
The full risk assessment results for the open coast area is included in Appendix B.
3.4.2 Noosa Heads
Noosa Heads is the tourism hub of the shire and encompasses Noosa’s most well-known attractions
including Main Beach, Hastings Street retail centre, a high number of tourist accommodation
buildings and access to the Noosa National Park. Noosa Heads is subject to potential coastal
hazards of erosion, storm tide inundation and permanent sea level rise.
Noosa Heads is a highly modified environment, with the first protective seawall being constructed
along Main Beach in 1954 and subsequently upgraded on a number of occasions to protect Hastings
Street properties from erosion. A training wall constructed in the late 1970’s at the mouth of the river
Section 28
Noosa Shire Council Coastal Hazard Adaptation Plan: Project Summary 21
Findings
was used to formalise Noosa Woods and assist in protecting Noosa Sound from direct wave impacts.
A rock groyne was constructed in 1983 midway along the beach and sand nourishment occurs
episodically, mainly using sand ‘recycled’ from the western end of Main Beach (Noosa Woods) via
the permanent sand shifter, which was commissioned around 2012.
Despite these measures, the risk level for Noosa Main Beach (and the existing seawall) is already
assessed as High, and the frequency and magnitude of erosion events will likely increase over time
with sea level rise. There is also a High risk posed to the sand shifter in its current position by 2040,
which is considered critical infrastructure for Council to maintain sand on Main Beach. Whilst the
main building is structurally expected to withstand such an event, it is likely to be inoperable for up
to six months depending on level of damage to ancillary components and any accessibility
constraints.
Similarly, the risk level to properties in Hastings Street from erosion (most properties on the foreshore
side of Hasting Street) is already Very High and will remain so without the application of further
mitigation measures.
Permanent sea level rise is estimated to pose a High risk to Noosa Drive (the sole vehicular access
to Hastings Street and the main visitor gateway to Noosa National Park) by 2100. This risk is high
largely because of the potential loss of access to Hastings Street and the high likelihood of the impact
occurring. Permanent sea level rise also poses a Very High risk to the southern section of the Noosa
Spit Recreational Reserve (also known as Dog Beach); this is ranked highly because of the increased
potential for breakthrough to Noosa Sound. Erosion may also have a High impact on infrastructure
within the southern end of the reserve such as dune vegetation, car park areas and public amenities.
3.4.3 Noosaville
Noosaville offers a mix of tourist accommodation and residential properties, with a high use retail
centre along Gympie Terrace. The foreshore parklands bordering the Noosa River are popular with
both tourists and locals and offers a range of recreational facilities including walking/running, biking,
playgrounds, tennis courts etc. A large number of jetties and pontoons (including the Noosa Yacht
Club) have been built along the River to moor vessels, as well as offer water sports, and these are a
fundamental contributor to the lifestyle offered by this area. The waterways in and around Noosaville
also contain a number of Conservation Parks (i.e. Keyser Island, Weyba Creek Conservation Parks)
which have high environmental value.
The primary hazards for Noosaville are permanent tidal inundation and storm tide inundation, as
there are varying forms of riverwalls along the Noosa River that provide some protection from
streambank erosion. The Noosa Shire Planning Scheme also sets floor levels for buildings that are
within the flood hazard area, providing a level of protection to properties from storm tide inundation
or permanent sea level rise. Therefore, immediate impacts are largely limited to risks associated with
inundation of critical underground infrastructure and the road and pedestrian network – that is,
service provision and accessibility. Longer term risks may stem from impacts associated with a
gradual decline in the amenity and liveability (real or perceived) of some neighbourhoods and public
areas (e.g. foreshore parks).
Storm tide inundation is expected to become a High or Very High risk at a number of locations or
assets by 2070 or 2100. These locations include:
Section 29
Noosa Shire Council Coastal Hazard Adaptation Plan: Project Summary 22
Findings
• Foreshore parklands and associated boating infrastructure by 2100 for 20 and 100 ARI events
• The Noosa River Holiday Park (Munna Point) by 2100 for the 100 ARI event
• Approximately 35 lots in the area bounded by Russell St to Weyba Rd, Gympie Terrace to Noosa
Parade by 2100 (based on a 1 in 100yr ARI)
• Approximately 80 lots (including approximately 40 dwellings) in the area bounded by Robert
Street to Eumundi-Noosa Road by 2100 (based on a 1 in 100yr ARI)
• Approximately 49 dwellings at the western end of Noosaville (in the area bounded by Hilton
Esplanade, Earl Street, Noosa River and Hilton Terrace by 2100 (based on a 1 in 100yr ARI)
• Approximately 30 lots impacted by 2100 in the area bound by Lake Weyba Drive and Noosa
National Park based on a 100 ARI scenario
• Significant areas of critical infrastructure (largely associated with inundation of underground
services, particularly the stormwater and sewer networks) are exposed under most ARI scenarios;
this poses a potential significant cost for Council to maintain operational infrastructure
• The Noosa Australian Football Club in Weyba Road is at a High risk level by 2070 (playing fields
only) due to permanent inundation and the 100 ARI stormtide event, with exposure extending to
road access and parking areas by 2100.
Permanent sea level rise will also pose a High to Very High risk at a number of locations between
2070 and 2100. This includes:
• Very High risk for Foreshore Parklands by 2070
• High risk for the Noosa Yacht Club and other jetties/boat ramps along the riverfront by 2070
• The Noosa River Holiday Park
• Approximately 30 lots (including approximately 15 dwellings) in central Noosaville (the area
bounded by Weyba Rd to Thomas Street, Gympie Terrace to Mary Street) by 2100
• Approximately 16 lots (including approximately 11 dwellings and some shop fronts) in northern
Noosaville (area bound by Thomas St to Robert St, Gympie Terrace to Gibson Road)
• Approximately 70 lots (including approximately 50 dwellings) in the area bounded by Robert
Street to Eumundi-Noosa Road by 2100
• Approximately 19 lots (including approximately 17 dwellings) in the area around the Bowls Club
(to Ernest St, Hilton Terrace) exposed by 2100
• Approximately 55 dwellings at the western end of Noosaville (in the area bounded by Hilton
Esplanade, Earl Street, Noosa River and Hilton Terrace) by 2100
• The Noosa Homemaker Centre by 2100 (access roads, property fringe/carpark only)
• Significant areas of critical infrastructure
Section 30
Noosa Shire Council Coastal Hazard Adaptation Plan: Project Summary 23
Findings
• Road and pedestrian networks used by the community to access private and commercial
properties, as well as foreshore areas and recreational facilities, are affected heavily across
Noosaville by 2100
• Conservation Parks (and the habitats they support) including Keyser Island, Weyba Creek by
2070
• The retirement village in Lake Weyba Drive by 2100 (road access and property fringe only)
• The Noosa Australian Football Club (playing fields and parking areas) by 2070.
3.4.4 Tewantin
Tewantin is a major service centre for the Noosa region, and accommodates a large residential
population. Fronting the Noosa River, the foreshore parklands provide recreational facilities for the
local community and include the Noosa Marina. Importantly, Tewantin is the southern access point
to the Noosa River Ferry which provides the closest vehicular access to Noosa North Shore, Teewah
and the very popular Cooloola Coast section of the Great Sandy National Park.
The Foreshore Parklands (including Martin, Tewantin and Earl St Parks, splash park and the
Tewantin Boat Ramp) were awarded a High risk ranking for storm tide inundation from 2070. These
are also at a High risk from permanent sea level rise by 2070. The Noosa Marina is rated as being
at a High risk of permanent sea level rise between 2070 and 2100 (the boardwalk, tenancies and
car park). Other critical underground infrastructure is also at a High or Very High Risk level, largely
in lower areas around Makepeace Island, the Tewantin Ferry landing and the end of Moorindil Street.
Approximately 15 lots (no dwellings) have been rated as being a High risk by 2070 as a result of
permanent sea level rise to the west of Sheep Island (in the area bound by Ward Park, Ward Street,
Myles Street, George Street and Aida Street). A further 7 lots are also considered at High risk by
2100 in the area bound by Tait Street, Cambridge Cresent and Moorindill Street.
The Noosa River Island Conservation Parks (Sheep, Goat and Makepeace) and their
ecological/open space values are a ranked as a High risk from permanent sea level rise by 2070;
the risk to the Lake Doonella wetlands also becomes High by 2070.
The risk from permanent sea level rise to the Noosa River Ferry access (Moorindal Street and
Maximillian Road) becomes High by 2070. Critical infrastructure around Lake Doonella is also at
High to Very High risk between 2070 and 2100. The road network around the Doonella bridge is
also potentially impacted by 2050 from permanent sea level rise.
3.4.5 Noosa North Shore
The Noosa North Shore area largely comprises the Great Sandy National Park, although there are
small low-density residential areas fringing the north bank of the Noosa River, at Teewah and pockets
along the Eastern shores of Lake Cootharaba/Lake Cooroibah.
Residential properties along the Noosa River (e.g. along Wallaby Track, Wygani Drive and Homeport
Track) are at a High risk from storm tide inundation from 2040 and a High to Very High risk as a
result of permanent sea level rise between 2070 and 2100. This involves the majority of properties
along the river and their road access, including the Rural Fire Brigade facilities on Noosa Drive.
Section 31
Noosa Shire Council Coastal Hazard Adaptation Plan: Project Summary 24
Findings
Risks to the Teewah township from coastal erosion are covered in section 3.1.
3.4.6 Lake Weyba and Surrounds
Low density residential properties front the western edge of Lake Weyba, which is otherwise
surrounded by National Park. The Noosa Aerodrome (a private facility with low use), is also situated
on the western shore of the lake. Residential properties along Weyba Creek close to the lake are
subject to both storm tide inundation and permanent sea level rise, with approximately 20 properties
(including approximately 15 dwellings) ranked as being at Very High risk from sea level rise by 2100.
Lake Weyba Drive (and critical infrastructure) is also at a High risk from permanent sea level rise,
with access affected.
Foreshore parklands around the lake edge, which include sections of Noosa National Park, have a
high environmental value, are at High risk as a result of permanent sea level rise by 2070, rising to
a Very High risk by 2100.
3.4.7 Lake Cooribah, Lake Cootharaba and Surrounds
Lake Cooribah and Cootharaba form part of the Noosa River system and are surrounded by the
extensive Great Sandy National Park. Adjacent to these features are areas of rural and residential
property, including a closed settlement on the south-western shore of Lake Cooroibah and a small
township at Boreen Point. Open space/conservation areas immediately around the lake shores and
the ecological values these support are at a High risk by 2070 as a result of permanent sea level
rise and storm tide inundation.
3.4.8 Summary
Asset risks that were considered High or Very High through the risk assessment (as summarised
Table 3-1), are considered Intolerable and require further investigation to determine potential risk
mitigation measures.
Table 3-1 Summary of High and Very High assets at risk from present and future coastal
hazards
Erosion Sea Level Rise Storm Tide
Reporting
Present
Present
Asset
2040
2070
2100
2040
2070
2100
2040
2070
2100
Area
day
day
Peregian beach and dune system,
H
SLSC
Peregian Park, critical H
H
infrastructure
David Low Way – Castaways VH
Open Coast H
Beach
David Low Way – Sunrise Beach VH VH VH
Sunrise and Sunshine beach and VH
H H
dune system
Sunrise Beach residential areas H H
Section 32
Noosa Shire Council Coastal Hazard Adaptation Plan: Project Summary 25
Findings
Erosion Sea Level Rise Storm Tide
Reporting
Present
Present
Asset
2040
2070
2100
2040
2070
2100
2040
2070
2100
Area
day
day
Sunshine Beach residential areas VH VH VH
Sunshine Beach SLSC H VH VH
Teewah beach and dune system H
Teewah Beach residential areas H
Teewah Esplanade H H H
Noosa North Shore Campground H H
Noosa Main Beach and dune H
H H H
system, SLSC
Sand recycling system H VH VH VH
Tourist
accommodation/commercial VH VH VH VH VH
Noosa Heads premises
Critical infrastructure VH
VH VH VH VH H
(water/sewer/stormwater etc.)
Roads VH H
Noosa Spit Recreation Area VH VH VH VH H
Foreshore Parklands (incl. private VH H
VH
infrastructure)
Noosa River Holiday Park / Coast VH H
H
Guard
Housing / businesses / tourism H VH H
Critical infrastructure VH H
Noosaville H VH H
(water/sewer/stormwater etc.)
Roads H VH
Weyba Ck conservation areas H H
Homemaker Centre, retirement H
villages
Noosa Australian Football Club H H H H
Residential areas VH H H
Critical infrastructure H H
(water/sewer/stormwater etc.)
Lake Weyba
Roads H
Noosa National Park H VH
Foreshore Parklands H H
Foreshore Parklands H VH H H
Critical infrastructure VH H
Tewantin H H
(water/sewer/stormwater etc.)
Roads H H H
Section 33
Noosa Shire Council Coastal Hazard Adaptation Plan: Project Summary 26
Findings
Erosion Sea Level Rise Storm Tide
Reporting
Present
Present
Asset
2040
2070
2100
2040
2070
2100
2040
2070
2100
Area
day
day
Residential areas (incl. islands), H
H
Noosa Marina
Lake Doonella conservation areas H H
Residential areas H VH VH H H H
Roads H VH VH
Noosa North Rural Fire Brigade H VH H
Shore
Critical infrastructure (electrical H
H
etc.)
Noosa Ferry VH VH H
Lake Boreen Point campground H
Cootharaba Conservation areas H H H H
The detailed risk assessment is available in Appendix B.
3.5 Phase 6: Options Assessment
Options to mitigate high and very high risks within each locality were considered, and the analysis
tables are provided in Appendix C. Within the adaptation pathway, highly ranked, “no regrets” options
will tend to be most suitable for short-term implementation over expensive or complex options.
The desired stakeholder outcomes for all open coast beaches focussed on the retention of the beach
and dune system, and the mitigation against erosion risks to built assets in key locations.
Maintenance of the existing dune systems, supported by complementary measures of community
education, detailed studies (where appropriate) and monitoring all ranked highly for addressing risks
to natural and built assets exposed to erosion hazards. There was also a high level of tolerance for
some instances of storm-tide inundation where it already occurs.
3.5.1 Eastern Beaches (Peregian to Sunshine Beach)
At Peregian, the wide and relatively intact dune system buffers built assets from impacts under most
planning horizons. Continued maintenance of this buffer was the highest ranked option for this area.
Community infrastructure management at Peregian Park and the Peregian Surf Life Saving Club,
buy back of privately-owned land parcels and beach nourishment/dune augmentation to delay
impacts were ranked significantly higher than asset relocation and seawalls.
No high or very high risks were identified for Marcus Beach therefore an MCA was not undertaken
for this locality.
The David Low Way crossing of Burgess Creek is a critical area at Castaways and Sunrise Beaches
requiring risk treatment. While maintenance of the existing dune ranked highly due to its relatively
low costs, other highly ranked measures included manual creek mouth management and beach
Section 34
Noosa Shire Council Coastal Hazard Adaptation Plan: Project Summary 27
Findings
nourishment/dune augmentation. Upgrading to extend the bridge, seawalls and road relocation were
the lowest ranked options for this site.
The Sunshine Beach SLSC, community parkland, beachfront residential properties and associated
roads and utilities are at high to very high risk from erosion impacts along Sunrise and Sunshine
Beaches. Continued maintenance of the dune system and manual creek mouth management both
ranked highly for this area, followed by beach nourishment/dune augmentation and buy back of
residential land parcels. Due to the intensity of existing development, avoid measures ranked poorly
due to their limited effectiveness. Seawalls in general but especially those on private land to protect
private residential assets also rated very poorly, largely due to the limited technical viability of the
option (high dune heights and infrastructure close to seaward property boundaries).
3.5.2 Teewah
Noosa North Shore Campground, the Teewah residential area and associated access are at high
risk to erosion. The highest ranked options for this area were active management of the beach and
dune (and complementary measures), community infrastructure management and design resilient
public infrastructure (where present). Buy back and beach nourishment were ranked lower, largely
due to their significant costs. Seawalls again rated poorly due to the high dune heights in the area
and the technical infeasibility of that option.
3.5.3 Noosa Heads (Erosion)
Noosa Heads is exposed to erosion from the open coast as well as inundation hazards via the Noosa
River frontage.
Noosa Main Beach is already exposed to very high erosion risks, existing risk treatments include a
seawall to protect landward infrastructure and a permanent sand shifter system to rapidly reinstate
the recreational beach following severe erosion. Further options have been considered to limit
erosion of the recreational beach as well as provide additional protection to tourist, commercial and
community infrastructure. Noosa Woods Beach lies north of Noosa Main Beach but is backed by a
well-vegetated dune system containing limited public infrastructure, except for infrastructure to
support operation of the sand shifter and access roads. Dog Beach, within the Noosa River, is subject
to erosion hazards as a result of channel migration.
For Noosa Main Beach, hazard resilient design for new or upgraded private infrastructure ranked
highest on the options, while dune augmentation was highest for Noosa Woods Beach and Dog
Beach. The density of development landward of Noosa Main Beach limits the implementation,
economic viability and political acceptance of many options to reduce asset exposure. Improving the
efficacy of the sand shifter rated higher than upgrading the existing seawall. Options to reduce the
intensity of existing development and protective structures such as groynes and breakwaters all rated
poorly, largely due to costs and social impacts.
3.5.4 Noosa Heads (Inundation)
High and very high risks associated with inundation impact on the Noosa River frontage of Noosa
Heads. For the highly developed tourist area around Noosa Parade to Noosa Drive where risks are
associated with sea level rise hazards, hazard resilient design for infrastructure rated highly, along
Section 35
Noosa Shire Council Coastal Hazard Adaptation Plan: Project Summary 28
Findings
with tide flaps /valves on the stormwater network to limit penetration onto roads and properties via
this path. Raising footpath levels rated lower than modifications to the stormwater network due to the
potential for increasing impacts on the road network.
At Dog Beach, the highest ranked options to manage sea level rise and storm tide risks were active
dune and habitat management as well as dune augmentation, which rated higher than manual creek
channel management.
Major infrastructure such as tidal gates or surge barriers, although benefitting more than just the
Noosa Heads locality, rated poorly for all parts of Noosa Heads, largely due to the significant costs,
environmental and social impacts, and complexity of gaining approvals.
3.5.5 Noosaville
Sea level rise and storm tide expose numerous areas within Noosaville and around Lake Weyba to
high and very high risks.
Hazard resilient design for public and private infrastructure rated well for both hazard types, along
with modifications to the stormwater network to reduce penetration into inland areas and build
redundancy into the system to ease impacts where possible. Options such as raising road or footpath
levels rated more highly than major infrastructure such as levees and tidal gates but would need to
be done in conjunction with stormwater network management measures for optimal benefit. Land
buy back and land swap rated poorly due to the major cost and social implications.
Although levees rated poorly due to the costs involved, the wider community benefit may outweigh
this. Similarly, although road raising rated poorly, the road network through Noosaville provides
important connectivity between Noosa Heads and Tewantin.
3.5.6 Tewantin
Assets at high risk or very high risk from sea level rise include residential areas (including roads and
associated utilities), Noosa Marina, Tewantin end of the Noosa River Ferry landing, and the foreshore
parklands. Design of hazard resilient infrastructure rated highly for this locality, as did rolling
easements and land management to support habitat migration, both of which could only be
implemented in selected areas. Levees, land buy back and tidal gates all rated poorly, driven by high
economic, environmental and/or social costs.
Only the foreshore parkland areas at Tewantin were at high risk from storm tide, with affected assets
mainly park infrastructure and associated utilities such as stormwater, electricity etc. The assessment
shows that designing hazard resilient infrastructure and stormwater network management actions
rated highly. The relatively short section of levee (and therefore lower cost) required to protect the
parklands elevates this option within the rankings, particularly compared to river walls with high crest
levels and tide gates. Master planning of public lands, while reducing impacts on infrastructure, does
not reduce risks on the broader usage of the land.
3.5.7 Noosa North Shore
For private riverfront development including the rural fire brigade facility on Noosa’s North Shore,
design resilient infrastructure was the highest ranked option to mitigate against risks from storm tide
Section 36
Noosa Shire Council Coastal Hazard Adaptation Plan: Project Summary 29
Findings
and sea level rise inundation, followed by reducing the intensity of future development. While some
of the properties already have river walls, crest heights are low. Raising crest levels is ranked higher
than levees and land buy back, all of which mitigate risks to the road network from sea level rise,
with the exception of road impacts around the Noosa North Shore end of the Noosa River Ferry
landing. Tidal gates at the mouth of the Noosa River is the lowest ranked option to mitigate against
inundation risks in this area.
3.5.8 Lake Cootharaba
Assets at high or very high risk from storm tide and/or sea level rise inundation in this locality are the
Boreen Point Campground and areas of National Park / conservation importance fringing the Lake.
As there is uncertainty on the extent of built assets within conservation areas, design of hazard
resilient infrastructure was the highest ranked option for managing sea level rise, closely followed by
habitat migration. Major built infrastructure to reduce risks to conservation areas all rated poorly,
including levees and tidal gates.
At Boreen Point Campground, the option ratings for storm tide were similar, although opportunities
to relocate important infrastructure landward ranked higher than implementation of measures such
as seawall, levees and tidal gates.
3.5.9 Summary
Coastal hazard adaptation options that rated favourably (albeit, many requiring further investigation)
in the MCA process at localities within Noosa Shire are summarised in Table 3-2.
Table 3-2 Summary of Preferred Adaptation Options
Locality Potential Adaptation Options (in order of Adaptation Hierarchy
preference) Approach
Peregian to Sunshine Active dune and habitat management Accommodate (short term)
Beaches Manual creek mouth management Planned transition (long term)
Community infrastructure management
Land buy back
Relocate important infrastructure
Beach nourishment
Dune augmentation
Noosa Heads Design of hazard resilient infrastructure Accommodate
Tide flaps and valves on stormwater pipe network
Active dune and habitat management
Dune augmentation
Improve sand shifter efficiency
Teewah Active dune and habitat management Accommodate
Beach nourishment
Dune augmentation
Noosaville Design of hazard resilient infrastructure Accommodate
Tide flaps and valves on stormwater pipe network
Raising road levels
Levees
Section 37
Noosa Shire Council Coastal Hazard Adaptation Plan: Project Summary 30
Findings
Locality Potential Adaptation Options (in order of Adaptation Hierarchy
preference) Approach
Tewantin Design of hazard resilient infrastructure Prepare/Accommodate
Tide flaps and valves on stormwater pipe network
Noosa North Shore Design of hazard resilient infrastructure Avoid/Prepare
Reduce intensity of future development
Lake Cootharaba Design of hazard resilient infrastructure Prepare
Relocate important infrastructure
Land management to support habitat migration
3.6 Phase 7: Socio-economic Appraisal
Following the MCA Assessment, a Cost-Benefit Analysis (CBA) was performed by Aither on two
regions within the Noosa region: the open coast and Noosaville (Aither, 2020a and b). The options
chosen were primarily those that were favoured by the MCA analysis, with some minor adjustments
made e.g. an additional option of changes to planning regulations was added to the Eastern Beaches.
The findings of the CBA are provided below.
3.6.1 Open Coast Locations
A cost-benefit analysis (CBA) was performed for a range of options for open coast locations (Teewah
and the Eastern Beaches) where risks were rated as high or very high by 2100. The Noosa Main
Beach compartment was not included due to the limited capacity to carry out measures in addition
to those already in place in this location (as noted in Section 3.5.3).
The analysis identified that option 3 (dune revegetation and beach nourishment/augmentation) would
provide the greatest economic net benefit for managing erosion risks along the Eastern Beaches, for
the options assessed. The benefits of this option are driven by the significant value provided by the
continued natural protection of high value beachfront properties, however it is recognised that this
option may only be of value in the short term and is ranked high because of the low cost of
implementation rather than the delivery of significant benefits.
Uncertainties remain regarding the reliability of a sufficient offshore sediment supply over the long
term due to incomplete understanding of existing sediment volumes, and changes to sediment
movements into the local offshore zone in the latter half of the study period.
Option 7 (changes to planning regulations) would also deliver net economic benefits, although the
net benefits are lower than under option 3. Implementing planning restrictions, alongside dune
augmentation in viable locations is likely to deliver socio-economic benefits to the community and
reduce risks.
Option 4 (construction of seawalls in high risk locations) had the least socio-economic benefit due to
loss of amenity, low community support, impacts on the tourism economy, and cost of construction.
Options 5 (property acquisition and conversion to public property) and 6 (Option 5 with a 15-year
leaseback of properties prior to conversion to public open spaces) were the most economically viable
for Teewah of all options analysed.
Section 38
Noosa Shire Council Coastal Hazard Adaptation Plan: Project Summary 31
Findings
Figure 3-1 Open Beaches Net Present Value (Source: Aither Economics, 2020)
3.6.2 Noosaville
The results of the Noosaville CBA have identified that Option 1 (levees and stormwater infrastructure
modifications) provides the greatest net benefit to the community in terms of protection from sea level
rise, as shown in Table 3-3. This is driven by avoided loss of tourism revenue and recreational area
and reduced infrastructure damage. It assumes that stormwater infrastructure modifications are
required from 2040, whilst the levees are not constructed until 2070.
Table 3-3 2100 Present Value Results, Noosaville (Source: Aither Economics, 2020)
Option 1 – Levee and Option 2 – road Confidence
stormwater modification raising
Net Present Value $21.5m -$3.9m
Benefit Cost Ratio 2.11 0.80
Costs $19.4m $19.2m
Levee costs $8.9m Medium
Stormwater modification costs $10.5m Medium
Road raising costs $19.2m Medium
Benefits $40.9m $15.3m
Recreational benefits $6.5m $0.1m Low
Avoided property damage $0.1m $0.1m Low
Avoided road damage $1.1m $0.6m Medium
Tourism benefits $27.1m $10.8m Low
Avoided damage to stormwater $3.0m $0.6m Medium
network
Residential nuisance benefits $3.1m $3.1m Low
Section 39
Noosa Shire Council Coastal Hazard Adaptation Plan: Project Summary 32
Conclusions and Recommendations
4 Conclusions and Recommendations
Noosa faces impacts from a range of coastal hazards, particularly towards the latter half of the
century. In some locations hazards are being experienced in such a way as to already represent a
material risk. A risk assessment identified that without mitigation, increased coastal erosion is likely
for the open coast region, having a high impact particularly on privately-owned assets, as well as
Council coastal infrastructure (e.g. roads and recreational areas) and the beaches themselves. Areas
along the Noosa River (Noosa Heads, Tewantin, and in particular Noosaville and Noosa North Shore)
will be increasingly at risk due to inundation associated with rising sea levels. In this instance, the
greatest level of exposure and impacts are expected to be felt by Council infrastructure (e.g.
stormwater networks, open space, roads), some private property, as well as indirect consequences
for adjacent retail and commercial operations.
A summary of the potential coastal hazard mitigation measures for consideration and further
investigation prior to inclusion in the Coastal Hazards Adaptation Plan is provided below. The
majority of these options were then analysed further through a Cost-Benefit Analysis. It’s important
to note there are a range of factors Council must consider beyond the findings of a CBA (i.e. as
expressed in financial terms) when determining which hazard mitigation measures to include in the
plan.
Locality Recommended Adaptation Options Recommended Adaptation
Hierarchy Approach
Peregian to Sunshine Active dune and habitat management Accommodate (short term)
Beaches Manual creek mouth management Planned transition (long
Community infrastructure management term)
Land buy back
Relocate important infrastructure
Beach nourishment
Dune augmentation
Noosa Heads Design of hazard resilient infrastructure Accommodate
Tide flaps and valves on stormwater pipe network
Active dune and habitat management
Dune augmentation
Improve sand shifter efficiency
Teewah Active dune and habitat management Accommodate
Acquisition of properties affected by coastal
erosion in 2070, and conversion of affected
properties to public open spaces
Beach nourishment
Dune augmentation
Noosaville Design of hazard resilient infrastructure Accommodate
Tide flaps and valves on stormwater pipe network
Raising road levels
Levees
Tewantin Design of hazard resilient infrastructure Prepare/Accommodate
Tide flaps and valves on stormwater pipe network
Section 40
Noosa Shire Council Coastal Hazard Adaptation Plan: Project Summary 33
Conclusions and Recommendations
Locality Recommended Adaptation Options Recommended Adaptation
Hierarchy Approach
Noosa North Shore Design of hazard resilient infrastructure Avoid/Prepare
Reduce intensity of future development
Lake Cootharaba Design of hazard resilient infrastructure Prepare
Relocate important infrastructure
Land management to support habitat migration
The feedback received during public consultation throughout the project thus far has been for Council
to focus on less intrusive solutions to minimising these potential risks such as nature-based solutions
(i.e. beach management and dune augmentation) on the open coast, rather than hard (less
reversible) interventions such as seawalls or levees. This was borne out by both the options
assessment (Phase 6) and more detailed Cost-Benefit Analysis (Phase 7). particularly for the open
coast areas which favoured ‘lighter touch’ options. For the settlement of Teewah, on the coast north
of Noosa, a planned transition was favoured by the CBA. Where inundation from sea level rise or
stormtide is the predominant hazard, the Cost-Benefit Analysis has favoured intervention such as
the construction of levees or infrastructure upgrades where there is significant public infrastructure
and properties at risk. The probable timing for these interventions is for adaptation options to be in
place by 2070. The study also found that planning controls may also be used to support nature-
based solutions, and thus could be included in a suite of complementary measures that are
consistent with the feedback received.
4.1 Additional considerations
While natural options such as dune augmentation and beach nourishment ranked highly in open
coast areas, uncertainty remains as to the most economical and reliable sources of sand that can be
used for this purpose. It is strongly recommended that investigations into possible sand sources for
these purposes are undertaken in the near future, with a view to securing long-term access, statutory
approvals and funding for implementation and a clear and sequenced action plan. This is especially
important given there may be a need to address the impacts of erosion promptly following extreme
storm events.
The concept design for inundation protection measures i.e. levees should also be further developed
to gain a deeper understanding of design options and costs.
Section 41
Noosa Shire Council Coastal Hazard Adaptation Plan: Project Summary 34
References
5 References
Aither, 2020a. Noosa Shire Council – Coastal Hazard Adaptaiton Plan Cost Benefit Analysis.
Aither, 2020b. Noosa Shire council CHAP – Phase 7, Noosaville Cost Benefit Analysis, prepared for
Noosa Shire Council
Section 42
Noosa Shire Council Climate Change Adaptation Plan: Project Summary A-1 Hazard Mapping Appendix A Hazard Mapping G:\Admin\B22613.g.mpb.Noosa_CHAS\R.B22613.005.01.Phase 7.docx
Section 43
; i Google™ earth
} x Data SIO, NOAA, U.S. Navy,
~Z fi, | NGA, GEBCO
ee Ae / fi image © 2017 DigitaiGlobe
ect - a | image © 2017 CNES/ Airbus
§ of
\ Zs ~ r . i
ioe ay ff . \ )
Cope A 5
Ang A F
w bea |
y a ‘ : . ss 4 i
a = Lake) |
LEGEND eRe =—_ |
Noosa Shire teed
LGA Boundary ‘ e f
rs “ j
——— Noosa River hie ten aa eg!
it ut ae = ™ n /
Peak Flood Depth (m) Ca 1 H
a J [
id i
, 0.0 to 0.5 Y i
0.5 to 1.0 F oan ; |
1.0 to 1.5 F Fi |
1.5 to 2.0 A v TL eewah
2.0 to 2.5 le j
2.5 to 3.0 . a }
3.0 to 3.5 5 : - Fo !
3.5 to 4.0 , , a
4.0 to 4.5 - y.. |
4.5 to 5.0 , : i
>5.0 a
Hazard extentderived : es ie !
=i . +
using methods described ; k ; Fs i
in Aurecon (2013) and ' oa
Airborne Laser Scanning . py a & '
data captured in 2010. ’ mo | :
inundation depths are oy Pip - } ‘
derived from waiter levels ee) panescooroibah Zz i
that do not include any : p « . Ss ;
freeboard allowance. i 5 4 K4
OIRO By
bee ys Er
ee ae |
a ee, Bs wn me mes Pe es at
\ tae a a teh SS Py ‘ ~ Suter asot ep y. Ps ie
* : pie Me Wert i ey a
2 5 Ree ; re op Men Sea ys ee
oe ; : ie Ce we Rae” Nt |
wee! Dees Ce (oe ae Beach)
oo! OV r ag yes elit
F Be - F . 7 ; = eS 2 ace on oe
ay “¢ a .
, xd : j |
\ ee : a
ae : . z ‘ Peregian|Beach
P . HG }
: at Pi ae B
a Ae
Title: Figure: Rev:
Present Day 100 year ARI Storm Tide Inundation Peak A-1 A
Depth
: ‘ : i sie
BMT WBM endeavours to ensure that the information provided in this We cy
map is correct at the time of publication. BMT WBM does not warrant, N Okm 4 8 ty C2:
guarantee or make representations regarding the currency and a mat
accuracy of information contained in this map. / \ Scale - Main Map ‘a BMT \WBM
‘ c i i Fi wal
www.bmtwbm.com.au
Filepath: 1|:\B22613.i.mbp.Noosa_CHAS\DRG\COA_010_170802_Storm_Tide_Present_Day.worSection 44
; i Google™ earth
} x Data SIO, NOAA, U.S. Navy,
oat fi, | NGA, GEBCO
ee Dye / i image © 2017 DigitalGlobe
acta r fi image © 2017 CNES/ Airbus
ye ~Y Foy |
> ay Pema y : . \ i}
Ang A !
> a ] i
: w : *. i ~ Ce , i
i. ue Meccan |
LEGEND acto Gia Wek.
Noosa Shire “ ae }
LGA Boundary he |
———— Noosa River on <._.SS eet
fas i , ee 3 ae
Peak Flood Depth (m) P |
eo {
7 0.0 to 0.5 Pe I
:0.5to 1.0 cake er )
1.0 to 1.5 , EO
1.5 to 2.0 pe ae
2.0 to 2.5 ee 2 ve
2.5 to 3.0 FE Boreen Ss
3.0 to 3.5 a. ee oe i
3.5 to 4.0 ae ae a i
4.0 to 4.5 ; all !
4.5 to 5.0 Be cial i
>5.0 ce ap pele
Hazard extentderived -— e a
: (TAN eee N
using methods described ; seat 9 = 5 ‘ =.
in Aurecon (2013) and Hii &: pe 3
Airborne Laser Scanning - gee | ss \
data captured in 2010. ’ Sa f
inundation depths are oy are r 7 v
derived from water levels 5 Mea ase) panescooroibah ae i
that do notinclude any . * a 7 ad c ‘
freeboard allowance. : so ah Gi
“ e P
, . Lae Weg
GO) ee eae
Y me Vs ek oe i ves oS a ri i
Ptr he fm Hy , Set fh en
2 - a‘ Ped ae ont, Ree Fs Prag ve
DEE ok . aaa mA ; hee Hy 4 © siSunshine)
eee Dey: Pia A) Ger Mem ecach |,
Ny Cooroy; ccm pari: “LO Maem 9,
? a een: P - + 5 tr ae aa a ay
; tae ‘ Ci Torey ; Pa 5 ay
ay “¢ os
\ ee : a
ae : . z ‘ Peregian|Beach -
5 ; Et ce }
: ag “a e™
sg et As i
5 oe |
Title: Figure: Rev:
2040 Planning Horizon 100 year ARI Storm Tide A-2 A
Inundation Peak Depth
A
BMT WBM endeavours to ensure that the information provided in this We
map is correct at the time of publication. BMT WBM does not warrant, N Okm 4 8 ty G2:
guarantee or make representations regarding the currency and | ma
accuracy of information contained in this map. Scale - Main Map ‘a BMT WBM
pope eet 3 : Ny : eZ,
www.bmtwbm.com.au
Filepath: |:\B22613.i.mbp.Noosa_CHAS\DRG\COA_010_170802_Storm_Tide_Present_Day.worSection 45
; i Google™ earth
4 i Data SIO, NOAA, U.S. Navy,
3 j A NGA, GEBCO
ee Nee / f image © 2017 DigitalGlobe
ect - a / image © 2017 CNES/ Airbus
{ , i
\ , /
\ ~~ ord i
Ss a ff \ 4 i
Cope A 5
Ang A ie
w i 4
y a ii ih oe = i
ae, oe % Coolcol
cone Beco.
Noosa Shire e ‘y Ae j
LGA Boundary ne 3 '
——— Noosa River ae _— 4 » |
i he x 4 ae
1 4
we | }
Peak Flood Depth (m) ee i i
Q ‘/
0.0 to 0.5 F
0.5 to 1.0 f ake) i
1.0 to 1.5 H
1.5 to 2.0 ee, alt
2.0 to 2.5 carats ree
2.5 to 3.0 FS Boreen| 4 H
3.0 to 3.5 a y i
3.5 to 4.0 7 i i a. i
4.0 to 4.5 yo rer |
4.5 to 5.0 % oo i
>5.0 oe a a
i. 4 ce ee
Hazard extentderived Ol ao ae 1
using methods described ; ay) a - 2 }
in Aurecon (2013) and ‘ : F
Airborne Laser Scanning A | te.
data captured in 2010. ii | \
inundation depths are ae pa ‘ Pex ' ‘
derived from water levels 5 ee ae) paar eo EZ ‘
that do notinclude any . * A . >" ‘
freeboard allowance. se . aA
ec - 2X : esr)
aa ee ‘SS :
’ e phe sy | pe
4 a rs eh) Be aay a no
. tes ba ; if Se bs a Sale: fomas a ae
. , H ret ee git ha > ty 7” Fs a ue)
oa $ s a : “ ree ae Thee a eeSunshine)!
Be: a RS
5 » Las ‘ . Mabe Pee =A =. roa
i oe { 4 Wake 4 y
nia : i . ao P
_ i en
\ ee : rae!
ae : . e : Peregian|Beach' |
: 5 ¢ Ls ra }
5 el |
Title: Figure: Rev:
2070 Planning Horizon 100 year ARI Storm Tide A-3 A
Inundation Peak Depth
: : : j sie
BMT WBM endeavours to ensure that the information provided in this We. oo
map is correct at the time of publication. BMT WBM does not warrant, N Okm 4 8 ty Oe:
guarantee or make representations regarding the currency and a ma
accuracy of information contained in this map. Scale - Main Map a BMT WBM
fore oe * : rad,
www.bmtwbm.com.au
Filepath: 1:\B22613.i.mbp.Noosa_CHAS\DRG\COA_009_170802_Storm_Tide_2070.worSection 46
; i Google™ earth
4 i Data SIO, NOAA, U.S. Navy,
oat f iL. | NGA, GEBCO
ee Nee / fi image © 2017 DigitaiGlobe
ect - a | image © 2017 CNES/ Airbus
§ ; F
\ Ss sy r a i
_ * = SS 4
Cope A 5
Ang A F
, ¥., ] i
w Pig }
ry er id aie a i
LEGEND WakelComoyy }
Noosa Shire bam 4
LGA Boundary nt ¥
——— Noosa River ae re ae. sg
£7 2 aie : 4 +a
yi. ; |
Peak Flood Depth (m) * 4 i
r q "
” 0.0 to 0.5 r { f
r /
: 0.5 to 1.0 po poke Jy |
1.0 to 1.5 | ak |
1.5 to 2.0 Ce, : 5
20to25 ; : $ sy rs lcewah
2.5 to 3.0 a ow /Boreen) }
3.0 to 3.5 F =, Ps j ' 1
3.5 to 4.0 —— !
4.0 to 4.5 }
4.5 to 5.0 £ a i
>5.0 a, : ;
Se -
, atlas ‘s
Hazard extentderived — = Se a !
using methods described ; dy 4 ee a . '
in Aurecon (2013) and i | P Pf
Airborne Laser Scanning bls a ee
data captured in 2010. ‘oa ie | :
inundation depths are ae pa 3 F ] y
derived from water levels \ Bee 2ke)Cooroibah aay ‘
that do notinclude any : ro A i 4 i
freeboard allowance. 3 ae th a /ad
i? aS \ i
— 7 .
, : cat) “Ss - ed
. “A ‘ Ls if i ye - 3 | 4 ee }
M re) 9 ; v Meee ea eS oo ey
Me : Cee pe I RE EN
AW x a : - are: ‘ ee a “Sunshine,
& fe wR cals re ee. hom a oy
¥ wee D iH oS Pa ae Beach”
© 1 Cocroyls ae anal. Qe ee)
2 Ne os bs 4 ; ® s os > Fe Ee a ey
‘ Ws x 2 : ee : P , F de 7 Bs
os r a | Dy 4 " ,
P * , ia 4 f
_ P ce L q ’|
; = eee
Ay : bg ya i]
\ ee : a
ae : . z ‘ Peregian Beach *
; f ; Fat /
P ae LS a
, & ; ~ ee #
‘ fi : Re Gy :
~ Ss nt i
Title: Figure: Rev:
2100 Planning Horizon 100 year ARI Storm Tide A-4 A
Inundation Peak Depth
: : : j sie
BMT WBM endeavours to ensure that the information provided in this We oo
map is correct at the time of publication. BMT WBM does not warrant, N Okm 4 8 ty C2:
guarantee or make representations regarding the currency and a ma
accuracy of information contained in this map. Scale - Main Map wa BMT \WBM
fore oe * : rad,
www.bmtwbm.com.au
Filepath: 1:\B22613.i.mbp.Noosa_CHAS\DRG\COA_011_170802_Storm_Tide_2100.worSection 47
? : i Googie™earth
i ; : Data SIO, NOAA, U.S. Navy,
2 “4 fi, P to NGA, GEBCO
é ye / ro a image © 2017 DigitalG lobe
acta : a F image © 2017 CNES / Airbus
§ bf
\ - ~y a a y :
4 ’ atl f ,
ay ff , | , ] \ 3}
ill A 7 } Fe oy
~ e r
ri er ; e3 i
rl q
LEGEND ee fHake|Cooloolal
Noosa Shire » |
LGA Baunllaly ae Fe. ee q :
———— Noosa River x ae 4
te oe 4 *
—— Urban Model Extent e SS ‘
rai “g 2 5
Peak Flood Depth (m) ; 1 y
f F lake
0.0 to 0.5 Cee |
0.5 to 1.0 er eed
1.0 to 1.5 ae =
1.5 to 2.0 p Py . 3
2.0 to 2.5 ws *& Boreen “wd
2.5 to 3.0 — as
3.0 to 3.5 , di
3.5 to 4.0 . a al
4.0 to 4.5 , Pet Y
4.5 to 5.0 ne oes
>5.0 ae ee i
Hazard extentderived F s. 4 E |
using methods described a.) ir
in WMA Water (2017) and | - oF oe j Pan.
Airborne Laser Scanning 7 ch wv F : os fe
data captured in 2010. ee aw ee ke Pa .
inundation depths are Fe 3 Beene ocore ar) ae
derived from water levels “a } : s ‘
; ao ca }
that do notinclude any F i *., ‘ai i
freeboard allowance. rs | * “ae
ieee Xx es eee
— a me « ie Bay)
NT Tanah iS) he
eM | "
Pea 2 : ‘ rae Be. Ps PP ie
ee fee ee t ioe —! _ eg
kes: 299 Up Fo _. = Bie ar 7
. gle> alekf ihe ich sg is Si
Toe 5, FM VS Goh i bic MA
nee . pera: Py |) 2 Maalbeach
— \ Gey” | a “. oe
Pile NT wa a ee ie:
ea eT , , , ™ , =
ORO RY te
fi rae " ; x o r iWeyba) i rf
ae . s 3 Peregian Beach |
- 5 oan ee
« : Ps = 3 Be ws a i
: ay % a ee iy
Title: Figure: Rev:
Present Day Planning Horizon Coincident Catchment B-1 A
Flooding & Storm Tide Inundation Peak Depth
if
BMT WBM endeavours to ensure that the information provided in this We
map is correct at the time of publication. BMT WBM does not warrant, N Okm 4 8 ty CDs
guarantee or make representations regarding the currency and a ve mek
accuracy of information contained in this map. / \ Scale - Main Map ‘a BMT \WBM
>curac i Fi wel
www.bmtwbm.com.au
Filepath: |:\B22613.i.mbp.Noosa_CHAS\DRG\COA_015_170802_Coincident_StormTide_and_Flooding_Present_Day.worSection 48
: P ioe % ereyole My Ti ¢4)
i Si : Data SIO, NOAA, U.S. Navy,
a “4 fi, Ft NGA, GEBCO
s ye ne image © 2017 DigitalG lobe
peed js ; me 7 p image © 2017 CNES / Airbus
§ ; . Pee Al <
\ _ “y ‘ ad if . 4
: = " ot ;
- a ff : { . 4 A y
———- A : , ro a3
y . |.
a . aa r
LEGEND ake'Como}
Noosa Shire si 7 }
LGA Boundary p. *
——— Noosa River , eo »
- -* q *
—— Urban Model Extent x ~~ |
n , F
Peak Flood Depth (m) , my
0.0 to 0.5 oe
i
—0.5to 1.0 Po ‘
1.0 to 1.5 i) _—
1.5 to 2.0 b en :
2.0 to 2.5 ee ee borcen ail
2.5 to 3.0 = pe
3.0 to 3.5 = fs * |
3.5 to 4.0 “ re a
4.0 to 4.5 > Pre a
4.5 to 5.0 PA @a:
>5.0 nie =
Hazard extentderived a p>! , 5
using methods described 2 3 Par ‘ ,
in WMA Water (2017) and a ae ee Saad
Airborne Laser Scanning bj < iy sn oe 1 if
. ‘ . : Fu aA aa
data captured in 2010. | = ee ae 5 ;
inundation depths are Fes é A eee Oreo aly ff
derived from water levels “ails a ys a: ?
that do notinclude any i 4, a x
freeboard allowance. é " (| — a LN
ee dy Pi eau)
Geta ew AO oe - Bays
i ie Or3.0% cal
“A 53 ee a ae ae ~~ Sa
Lo gee Soaare Geis
S : eee or ard, eae 1) bene | ee ss
‘ 5 . ; Ce he Ac Ss ‘e Tink ieee
Wet ts ee = aeBeach |
RN Se ea OP Se
es La gt ie Pe ee a as
: | oe i. :
oe { oe y 3,
5 : ; , rier a ve
ae. . . SF Peregian|Beach
are - m trang i
Title: Figure: Rev:
2070 Planning Horizon Coincident Catchment Flooding B-3 A
& Storm Tide Inundation Peak Depth
if
BMT WBM endeavours to ensure that the information provided in this We
map is correct at the time of publication. BMT WBM does not warrant, N Okm 4 8 ty G2:
guarantee or make representations regarding the currency and ——— Me ms
accuracy of information contained in this map. / \ Scale - Main Map ‘a BMT \WBM
>curac i Fi wal
www.bmtwbm.com.au
Filepath: |:\B22613.i.mbp.Noosa_CHAS\DRG\COA_013_170802_Coincident_StormTide_and_Flooding_2070.worSection 49
? : f i} Google™earth
i * 1 , Data SIO, NOAA, U.S. Navy,
- ef fi, Pl NGA, GEBCO
s ye F a a ! Image © 2017 DigitalG lobe
peed js ; a p image © 2017 CNES/ Airbus
§ , . a in|
i - } me P
\ — “™ ‘ ad ai ¥
— * i : ais 6 ae
a A Ys yi 3 3
ng 7 x F
, od ;
sr 7 > r
LEGEND Make\Como) 1
Noosa Shire a ae d
LGA Boundary y.” ™ li
" Ao 4
——— Noosa River - — { .
—— Urban Model Extent Z' ba ]
i b 4 a
Peak Flood Depth (m) . ’ y
i F fifake)
0.0 to 0.5 |
0.5 to 1.0 Pes
1.0 to 1.5 +
1.5 to 2.0 a :
2.0 to 2.5 & ate botcer) ft
2.5 to 3.0 —— wer
3.0 to 3.5 - i. ual |
3.5 to 4.0 : ~ ”
4.0 to 4.5 4 é
4.5 to 5.0 me tte’
>5.0 | ea .” eas
Hazard extentderived a ZS. oe i
using methods described si we ar :
in WMA Water (2017) and | ool ig me é
Airborne Laser Scanning ae ce sa 7 f
data captured in 2010. a oor ss A ai t ss :
inundation depths are a. i Been Coo cibaiy Fina
derived from water levels a
that do not include any a : A y : N
Pa eet er) : im a Hagunal
freeboard allowance. ‘2 1] “— ol
ee eZ Se
i We ee “1h ON
Ng a al Ae BEN IG =, =
ve 4 Farle ial eres . Sins
, ae . OEE Ms £ tae e Wes a .
re ae p VEE VPS Velo ey
. peat “ oon -_ i a al Beach |
Fs ei aor eae oy ae Si at ’ *
ss ve 1 : ‘ a ee 4 FS
eo Tae a | is J : ' ra AG 2 ys ]
Be ! Par ; ee
’ ; ; ger a.
. 5 5 : a he i
ae. . . SF Peregian|Beach
OS ae
, ae a ' = &
& uty Sy base by
om LAE
Title: Figure: Rev:
2100 Planning Horizon Coincident Catchment Flooding B-4 A
& Storm Tide Inundation Peak Depth
if
BMT WBM endeavours to ensure that the information provided in this en
map is correct at the time of publication. BMT WBM does not warrant, N Okm 4 8 ty Cas
guarantee or make representations regarding the currency and ——— Me ms
accuracy of information contained in this map. / \ Scale - Main Map ‘a BMT \WBM
>curac i Fi wel
www.bmtwbm.com.au
Filepath: |:\B22613.i.mbp.Noosa_CHAS\DRG\COA_012_170802_Coincident_StormTide_and_Flooding_2100.worSection 50
; Google™ earth
R x Data SiO, NOAA, U.S. Navy,
oat A\ Mey Mers-lec)
ee ~ } image © 2017 DigitaiGlobe
ee r : image © 2017 CNES / Airbus
1 ' ; — ,
ay NA 7 % ,
—_ we »
i / 4 "a A t
hee j
LEGEND ake\Coro * ‘oolocla |!
pa] Noosa Shire y a i
LGA Boundary ~ FH
Noosa River ; See 2 A an i
ad i i
f ar,
. . oy. fl
Peak Flood Depth (m) ee /
i} b rf
i i
1 0.0 to 0.5 Fs
: 0.5 to 1.0 4 ee
4.0 to 1.5 7 ‘Cootharaba am
1.5 to 2.0 3 iil »Teewah
2.0 to 2.5 Ye ee :
2.5 to 3.0 5-.Boreen i |
3.0 to 3.5 a ee r ;
3.5 to 4.0 ; 4 {
4.0 to 4.5 ; gi
4.5 to 5.0 x a t
>5.0 ee
Hazard extentderived _. a eas ae
using published tidal Pe S ea)
planes, sea-levelrise a : me
allowance and Airborne ' | di 1s a ;
Laser Scanning data a ee mics \
captured in 2016. Le ga Pag ‘
inundation depths are ' See ae ota ac it
derived from water levels - : a x g ; 7
that do not include any 5 ae a N
freeboard allowance. 7 i BY es : a
ces. “San
. eat, fe meey,
, Peat isc e's.
ss Bes Pep ss t Een mene ty ae ae ' |
we aa Cro fy Re ip MO
Pb, be otk Tn aa 4 J
7 . Pi ee ee perm Qe gel re, = :
? CUES Sods od a Pa ie 8
Sie : , oF s aa a
re , F — ene
¥ € toy ; , |
; a ms! a ; FH
Aa |
Title: Figure: Rev:
2040 Planning Horizon Permanent Inundation due to Sea E-1 A
Level Rise
i. ' sara 2 PAO
BMT WBM endeavours to ensure that the information provided in this Le
map is correct at the time of publication. BMT WBM does not warrant, N Okm 4 8 if
guarantee or make representations regarding the currency and a % :
accuracy of information contained in this map. Scale - Main Map vias BMT WBM
www.bmtwbm.com.au
Filepath: 1\B22613.i.mbp.Noosa_CHAS\DRG\COA_017_170803_SLR_2040.worSection 51
; Google™ earth
) y Data SIO, NOAA, U.S. Navy,
oat A NGA, GEBCO
ee ~ image © 2017 DigitaiGlobe
e ‘ ; image © 2017 CNES / Airbus
1 ' pe }
— NB ff : A ‘|
Xu a A 2
ig g A
cam WA Sy LakelCoolcoiayam
LEGEND akelGomo, < b j
ipa] Noosa Shire i Ae er i
LGA Boundary Sg f
Noosa River Ea eg J q Rr I
‘ va rm i
el {
aio ii
- ‘ |
Peak Flood Depth (m) a |
a a
‘1 0.0 to 0.5 f io i
0.5 to 1.0 one. ; ,
4.0 to 1.5 ‘Cootharaba il
1.5 to 2.0 : :
2.0 to 2.5 = . Teguon
2.5 to 3.0 p= Boreen A f
3.0 to 3.5 ee ee | ,
3.5 to 4.0 7 r. 4 j
4.0 to 4.5 vr
4.5 to 5.0 a ee
>5.0 aa / ee ;
Hazard extentderived eae es
using published tidal ia 5
planes, sea-levelrise i oe p ¥ i ,
allowance and Airborne ie a dee
Laser Scanning data ee: ac)
captured in 2016. Le ge C yan
Inundation depths are 5 Mee a rags cibah \
derived from water levels : - . 5 “re iy
that do notinclude any ie ~ oy N
freeboard allowance. ie} ee * CY
3 ae iy ? ts
i* ae PE i) we MB BE,
} wis ek soe Ptr oe eee Pa
. ‘ ances % ie Pe ne al SD “ be®
: - oe . Bit any ge A Pot elites neal a Pie
Roe : Lake ae SN Aaa eine)
cs IDoonelia) fe ae oe Beooih
Boo ole Ma ee f BS NSS a2
he. Ae ; ) fs
p Py Wane .
| pape | ee i
, ; FE %, a ' ra
A |
Title: Figure: Rev:
2070 Planning Horizon Permanent Inundation due to Sea E-2 A
Level Rise
, ; baba sre
BMT WBM endeavours to ensure that the information provided in this “Ue
map is correct at the time of publication. BMT WWBM does not warrant, N Okm 4 8 if
guarantee or make representations regarding the currency and a ™
accuracy of information contained in this map. Scale - Main Map = BMT WBM
www.bmtwbm.com.au
Filepath: 1\B22613.i.mbp.Noosa_CHAS\DRG\COA_018_170803_SLR_2070.worSection 52
: : i Google™ earth
' x for CRS OM (0-1 MRM -La
nag fi, NGA, GEBCO
ee ae / 3 i image © 2017 DigitalGlobe
cel . a 7 / image © 2017 CNES / Airbus
§ . De ce } ;. /
4 , vs ff
' - ox 4 a j
= a. ae a 4 yy
‘ ae : - \ {
. “i a <a
am QW . LakelCoolcola)
LEGEND ake Como ee hy 7
Noosa Shire ai. r
LGA Boundary a §
= es. Se 4 .
——— Noosa River oy ee Cg a Ss
|
cf , |
Peak Flood Depth (m) va f
al i] J Hi
ri 0.0 to 0.5 o :
: 0.5 to 1.0 pak, ee f
1.0 to 1.5 ae
1.5 to 2.0 ae ; od
2.0 to 2.5 . ¥ vo
2.5 to 3.0 . 7 Boreen 4 |
3.0 to 3.5 es Fs }
3.5 to 4.0 ~—S
4.0 to 4.5 yl ,
4.5 to 5.0 > - ¥ ,
>5.0 re < c oo aad |
Hazard extentderived A wae. = on — |
using published tidal = aN . . a
planes, sea-levelrise iE ne 4
allowance and Airborne v Be \ oo - {
Laser Scanning data , y > ae ;
captured in 2016. Le Ge C i
Inundation depths are . eee one ue he :
derived from water levels : a : x <
that do notinclude any 3 ae NS ~~
freeboard allowance. = ; a “4 -
a ; & ; ys ep Ms Rides i:
a ) , Pk PEN SP Dp eres
4 i” dicate ta, So Le ol toon: a
: ai ‘ ee Oh ok |
A: BE ok . é Bn eS be? “Sunshine
t Se : Ped RR ee a Fh
ag ; Pers mE Y PASS
ar NS 3 “ E i LS + 1 N
ao BN d te, feta a Pa
ae oe ; hg.
- a il ; a ; le, a q i
ane : : : Peregian|Beach\ |
CON ae
; ie sot Oe . ~ Eee My
a ee 2
Title: Figure: Rev:
2100 Planning Horizon Permanent Inundation due to Sea E-3 A
Level Rise
/ . ; ; sie
BMT WBM endeavours to ensure that the information provided in this We oo
map is correct at the time of publication. BMT WBM does not warrant, N Okm 4 8 ( Oy
guarantee or make representations regarding the currency and a ____ Me
accuracy of information contained in this map. / \ Scale - Main Map a BMT WBM
>curac’ i = a SF,
www.bmtwbm.com.au
Filepath: 1\B2261 3.i.mbp.Noosa_CHAS\DRG\COA_019_170803_SLR_2100.worSection 53
Noosa Shire Council Climate Change Adaptation Plan: Project Summary B-1 Detailed Risk Assessment Appendix B Detailed Risk Assessment G:\Admin\B22613.g.mpb.Noosa_CHAS\R.B22613.005.01.Phase 7.docx
Section 54
Consequence Risk Level
Hazard Event/ Planning Existing Likelihood of Combined
Asset Name Location Asset Type Impacted Assets Environ- Adaptive
Type Horizon Controls the Hazard Community Council Consequence
mental Capacity
[ PB1] Now Unlikely Insignificant Insignificant Insignificant Insignificant Low
No impact
Peregian 2040 Unlikely Insignificant Insignificant Insignificant Insignificant Low
Beach 2070 Unlikely Insignificant Insignificant Insignificant Insignificant Low
Residential
south of
properties
surf club – Detached
Peregian Beach Vegetated dune
east of Housing, a few Erosion
(Single, buffer,
Plover St, townhouses 28 lots impacted; 28
detached 2100 Unlikely Moderate Insignificant Moderate Moderate Medium
Shearwater partial
housing)
St, and
Lorikeet
Drive
Now Beach access Unlikely Insignificant Insignificant Insignificant Insignificant Low
2040 Beach access Vegetated dune Unlikely Insignificant Insignificant Insignificant Insignificant Low
Lot 6 Open Space/ Car park, beach buffer, coastal
Victory Park Erosion 2070 Unlikely Minor Insignificant Minor Minor Low
CP864962 Recreation access building line/
Car park, beach building setback
2100 Unlikely Minor Insignificant Moderate Moderate Medium
access, park shelters
Now SLSC tower & beach Unlikely Minor Insignificant Minor Minor Low
2040 access Unlikely Moderate Insignificant Moderate Moderate Medium
Vegetated dune
2070 Playground, skate Unlikely Major Insignificant Major Major High
Lot 159 Open Space/ buffer, coastal
Peregian Park Erosion park, pathways,
CP839188 Recreation building line/
SLSC tower, public
2100 building setback Unlikely Major Insignificant Major Major High
amenities, & beach
access
Now No impact Unlikely Insignificant Insignificant Insignificant Insignificant Low
Minor operational
2040 impact (SLS Vegetated dune Unlikely Minor Insignificant Minor Minor Low
Lot 165 Community services) buffer, coastal
Peregian SLSC Erosion
MCH5180 Services Moderate operational building line/
2070 Unlikely Moderate Insignificant Moderate Moderate Medium
impact (SLS services building setback
SLSC Building
2100 Unlikely Major Insignificant Major Major High
heavily impacted
Now Coastal dunes Unlikely Minor Minor Minor Minor Low
2040 Unlikely Minor Minor Minor Minor Low
Peregian Beach Peregian Beach Car
(beach, Park/ toilet, coastal
Unallocated Open Space/
vegetated dunes Erosion dune vegetation & Nil
State Land Conservation 2070 Unlikely Moderate Moderate Moderate Moderate Medium
and foreshore beach access.
reserve) Partial loss of high
use foreshore
2100 Unlikely Major Moderate Major Major High
North & Stormwater, Now Pipes, pits, poles, Unlikely Insignificant Insignificant Insignificant Insignificant Low
Mixed
South water supply, 2040 pumps, low voltage. Vegetated dune Unlikely Insignificant Insignificant Insignificant Insignificant Low
infrastructure Erosion
Peregian sewage, energy 2070 Sewage impacted buffer Unlikely Moderate Insignificant Moderate Moderate Medium
networks
Beach and lighting 2100 first and most Unlikely Moderate Insignificant Major Major High
Road network Now Unlikely Insignificant Insignificant Insignificant Insignificant Low
North &
(Particularly 2040 Road surfaces, Unlikely Insignificant Insignificant Insignificant Insignificant Low
South Vegetated dune
Osprey Ave., Road reserve Erosion 2070 guttering, and Unlikely Minor Insignificant Minor Minor Low
Peregian buffer
Pitta St., Piper adjacent pathways
Beach 2100 Unlikely Minor Insignificant Minor Minor Low
St)
Now Unlikely Minor Minor Minor Minor Low
Coastal dunes &
Unallocated Open Space/ 2040 Unlikely Minor Minor Minor Minor Low
Marcus Beach Erosion foreshore (low Nil
State Land Conservation 2070 Unlikely Minor Minor Minor Minor Low
visitation)
2100 Unlikely Moderate Moderate Moderate Moderate Medium
Castaways Lot 159 Open Space/ Erosion Now Dune vegetation, Vegetated dune Unlikely Minor Minor Minor Minor Low
Beach CP839188; Conservation 2040 with mostly informal buffer Unlikely Minor Minor Minor Minor Low
Foreshore 2070 access. 2 small Unlikely Moderate Moderate Moderate Moderate Medium
Reserve 2100 boardwalk Unlikely Moderate Moderate Moderate Moderate Medium
areas/carparks
Section 55
Consequence Risk Level
Hazard Event/ Planning Existing Likelihood of Combined
Asset Name Location Asset Type Impacted Assets Environ- Adaptive
Type Horizon Controls the Hazard Community Council Consequence
mental Capacity
Castaways Park LotPlan Open Space/ Erosion Now Footpaths, Vegetated dune Unlikely Minor Minor Minor Minor Low
105MCH80 Conservation 2040 Boardwalk, buffer and David Unlikely Minor Minor Minor Minor Low
7481 & 2070 vegetation Low Way Unlikely Minor Minor Minor Minor Low
89MCH540 2100 Unlikely Minor Minor Moderate Moderate Medium
1
Mixed Castaways Stormwater, Erosion Now Small number of Vegetated dune Unlikely Insignificant Insignificant Insignificant Insignificant Low
infrastructure Beach – sewage, energy 2040 pipes, pits, poles, buffer Unlikely Insignificant Insignificant Minor Minor Low
networks adjacent to and lighting 2070 pumps, low voltage. Unlikely Minor Insignificant Moderate Moderate Medium
David Low 2100 Unlikely Moderate Insignificant Moderate Moderate Medium
Way
David Low Way Castaways Council-owned Erosion Now Major road access Vegetated dune Unlikely Insignificant Insignificant Insignificant Insignificant Low
Beach infrastructure near Burgess Ck buffer
2040 Pathways adjacent Unlikely Minor Insignificant Moderate Moderate Medium
to carpark impacted
2070 Whole section DLW Unlikely Major Insignificant Major Major High
and carpark
2100 Major road access Unlikely Major Insignificant Catastrophic Catastrophic Very High
near Burgess Ck,
partially isolates
Castaways
residential area
David Low Way Sunrise Council-owned Erosion Now Major road access Vegetated dune Unlikely Insignificant Insignificant Insignificant Insignificant Low
Beach infrastructure 2040 near Burgess Ck, buffer Unlikely Major Insignificant Catastrophic Catastrophic Very High
approachin 2070 isolates Castaways Unlikely Major Insignificant Catastrophic Catastrophic Very High
g Burgess 2100 residential area Unlikely Major Insignificant Catastrophic Catastrophic Very High
Ck
Mixed Sunrise Stormwater, Erosion Now Small number of Vegetated dune Unlikely Insignificant Insignificant Insignificant Insignificant Low
infrastructure Beach – sewage, energy 2040 pipes, pits, poles, buffer Unlikely Insignificant Insignificant Minor Minor Low
networks David Low and lighting 2070 pumps, low voltage. Unlikely Minor Insignificant Moderate Moderate Medium
Way 2100 Unlikely Moderate Insignificant Moderate Moderate Medium
Orient Bushland LotPlan Open Space/ Erosion Now Vegetation, Vegetated dune Unlikely Minor Minor Minor Minor Low
Reserve South 6N21840 & Conservation 2040 boardwalk buffer and David Unlikely Minor Minor Minor Minor Low
211RP1353 2070 Low Way Unlikely Minor Minor Minor Minor Low
63 2100 Unlikely Minor Minor Moderate Moderate Medium
Residential [SrB1] Predominantly Erosion Now No lots impacted Vegetated dune Unlikely Insignificant Insignificant Insignificant Insignificant Low
properties Orient detached 2040 No lots impacted buffer, coastal Unlikely Insignificant Insignificant Insignificant Insignificant Low
Sunrise Beach Drive housing 2070 1 lot partially building line/ Unlikely Minor Insignificant Insignificant Minor Low
(multi-res & impacted building setback
detached) 2100 5 lots impacted; 4 Unlikely Moderate Insignificant Major Major High
partial, 1 full lots
Section 56
Consequence Risk Level
Hazard Event/ Planning Existing Likelihood of Combined
Asset Name Location Asset Type Impacted Assets Environ- Adaptive
Type Horizon Controls the Hazard Community Council Consequence
mental Capacity
Residential [SrB3] Predominantly Erosion Now No lots impacted Vegetated dune Unlikely Insignificant Insignificant Insignificant Insignificant Low
properties Tingira St detached 2040 Approx.4 lots buffer, coastal Unlikely Minor Insignificant Insignificant Minor Low
Sunrise Beach (north end) housing (approx. 1 full lots building line/
(multi-res & 2070 Approx. 5 lots (incl. building setback Unlikely Moderate Insignificant Major Major High
detached) approx. 2 full lots)
2100 Approx. 8 lots (incl. Unlikely Major Insignificant Catastrophic Catastrophic Very High
approx. 5 full lots)
Residential [SrB2] Detached Now No lots impacted Vegetated dune Unlikely Insignificant Insignificant Insignificant Insignificant Low
properties Tingira St housing 2040 7 lots impacted; 7 buffer, coastal Unlikely Minor Insignificant Insignificant Minor Low
Sunrise Beach partial lots building line/
(south end)
(multi-res & 2070 11 lots impacted; 6 building setback Unlikely Major Insignificant Major Major High
detached partial, 5 full lots
2100 Approx. 11 lots (incl. Unlikely Major Insignificant Catastrophic Catastrophic Very High
approx. 11 full lots)
Mixed Sunrise Stormwater, Erosion Now Pipes, pits, poles, Vegetated dune Unlikely Insignificant Insignificant Insignificant Insignificant Low
infrastructure Beach water supply, 2040 pumps, low voltage. buffer Unlikely Minor Insignificant Moderate Moderate Medium
networks Beach – sewage, energy 2070 Unlikely Minor Insignificant Moderate Moderate Medium
Tingira & and lighting 2100 Unlikely Moderate Insignificant Major Moderate High
Sobraon St
Road network Sunrise Road reserve Erosion Now Road surfaces, Vegetated dune Unlikely Insignificant Insignificant Insignificant Insignificant Low
Beach – 2040 guttering, and buffer Unlikely Insignificant Insignificant Insignificant Insignificant Low
Tingira & 2070 adjacent pathways. Unlikely Insignificant Insignificant Minor Minor Low
Sobraon St 2100 Partially impacted. Unlikely Insignificant Insignificant Moderate Moderate Medium
Residential [SB1] Ross Predominantly Erosion Now No lots impacted Vegetated dune Unlikely Insignificant Insignificant Insignificant Insignificant Low
properties Cr & detached 2040 2 lots impacted; 2 buffer Unlikely Minor Insignificant Insignificant Minor Low
Sunshine Beach Adams St housing partial
(multi-res & 2070 3 lots impacted; 3 Unlikely Moderate Insignificant Minor Moderate Medium
detached) partial
2100 12 lots impacted; 3 Unlikely Major Insignificant Major Major High
full lot, 9 partial
Mixed Sunshine Stormwater, Erosion Now Pipes, pits, poles, Vegetated dune Unlikely Insignificant Insignificant Insignificant Insignificant Low
infrastructure Beach – water supply, 2040 pumps, low voltage. buffer Unlikely Insignificant Insignificant Insignificant Insignificant Low
networks Ross Cr sewage, energy 2070 Unlikely Insignificant Insignificant Moderate Moderate Medium
and lighting 2100 Unlikely Insignificant Insignificant Moderate Moderate Medium
Road network Sunshine Road reserve Erosion Now Road surfaces, Vegetated dune Unlikely Insignificant Insignificant Insignificant Insignificant Low
Beach – 2040 guttering, and buffer Unlikely Insignificant Insignificant Insignificant Insignificant Low
Ross Cr 2070 adjacent pathways Unlikely Insignificant Insignificant Moderate Moderate Medium
2100 Unlikely Insignificant Insignificant Moderate Moderate Medium
Residential [SB3] Park Predominantly Erosion Now 3 lots impacted; 3 Vegetated dune Unlikely Insignificant Insignificant Insignificant Insignificant Low
properties Cr & Webb detached partial buffer, coastal
Sunshine Beach Rd housing, some 2040 11 lots impacted;6 building line/ Unlikely Major Insignificant Major Major High
(multi-res & multi-unit resi partial, 5 full building setback
detached) and tourist 2070 16 lots impacted; 6 Unlikely Catastrophic Insignificant Catastrophic Catastrophic Very High
accom partial, 10 full lots
2100 19 lots impacted; 3 Unlikely Catastrophic Insignificant Catastrophic Catastrophic Very High
partial, 16 full
Residential [SB4] Mostly detached Erosion Now No lots impacted Vegetated dune Unlikely Insignificant Insignificant Insignificant Insignificant Low
properties Belmore residential, plus 2040 No lots impacted buffer and Unlikely Insignificant Insignificant Insignificant Insignificant Low
Sunshine Beach Tce & major multi-unit 2070 8 lots impacted; 8 minimum Unlikely Moderate Insignificant Insignificant Moderate Medium
(multi-res & Stevens St tourist accom partial setbacks
detached) 2100 11 lots impacted; 7 Unlikely Major Insignificant Catastrophic Catastrophic Very High
partial, 4 full lots
Mixed Sunshine Stormwater, Erosion Now Pipes, pits, poles, Vegetated dune Unlikely Insignificant Insignificant Insignificant Insignificant Low
infrastructure Beach – water supply, 2040 pumps, low voltage. buffer Unlikely Insignificant Insignificant Moderate Moderate Medium
networks Belmore sewage, energy 2070 Unlikely Moderate Insignificant Major Major High
Tce and lighting 2100 Unlikely Major Insignificant Major Major High
Road network Sunshine Road reserve Erosion Now Road surfaces, Vegetated dune Unlikely Insignificant Insignificant Insignificant Insignificant Low
Beach – 2040 guttering, and buffer Unlikely Minor Insignificant Moderate Moderate Medium
Belmore 2070 adjacent pathways Unlikely Moderate Insignificant Major Major High
Tce 2100 Unlikely Moderate Insignificant Major Major High
Section 57
Consequence Risk Level
Hazard Event/ Planning Existing Likelihood of Combined
Asset Name Location Asset Type Impacted Assets Environ- Adaptive
Type Horizon Controls the Hazard Community Council Consequence
mental Capacity
Residential [SB5] Predominantly Erosion Now 11 lots impacted; 11 Vegetated dune Unlikely Moderate Insignificant Moderate Moderate Medium
properties Esplanade, detached resi,, partial lots buffer, coastal
Sunshine Beach & Arakoon with some multi- 2040 20 lots impacted; 9 building line, Unlikely Major Insignificant Catastrophic Catastrophic Very High
(multi-res & Cres unit resi/tourist partial, 11 full lots with small
detached) accom 2070 22 lots impacted; 3 building setback Unlikely Catastrophic Insignificant Catastrophic Catastrophic Very High
partial, 19 full lots section
2100 24 lots impacted; 8 Unlikely Catastrophic Insignificant Catastrophic Catastrophic Very High
partial, 22 full lots
Mixed Sunshine Stormwater, Erosion Now Pipes, pits, poles, Vegetated dune Unlikely Insignificant Insignificant Moderate Moderate Medium
infrastructure Beach – water supply, 2040 pumps, low voltage. buffer Unlikely Insignificant Insignificant Moderate Moderate Medium
networks Esplanade sewage, energy 2070 Unlikely Moderate Insignificant Moderate Moderate Medium
Arakoon and lighting 2100 Unlikely Moderate Insignificant Major Major High
Tce
Road network Sunshine Road reserve Erosion Now Road surfaces, Vegetated dune Unlikely Minor Insignificant Insignificant Insignificant Low
Beach – 2040 guttering, and buffer Unlikely Minor Insignificant Moderate Moderate Medium
Esplanade 2070 adjacent pathways Unlikely Moderate Insignificant Moderate Moderate Medium
Arakoon 2100 Unlikely Moderate Insignificant Major Major High
Tce
Residential [SB6] Detached Erosion Now 8 lots impacted; 8 Vegetated dune Unlikely Minor Insignificant Moderate Moderate Medium
properties Seaview housing partial lots buffer, coastal
Sunshine Beach Tce 2040 18 lots impacted; 8 building line/ Unlikely Major Insignificant Catastrophic Catastrophic Very High
(multi-res & partial, 11 full lots building setback
detached) 2070 18 lots impacted; 4 Unlikely Catastrophic Insignificant Catastrophic Catastrophic Very High
partial, 14 full lots
2100 19 lots impacted; 5 Unlikely Catastrophic Insignificant Catastrophic Catastrophic Very High
partial, 14 full lots
Mixed Sunshine Stormwater, Erosion Now Pipes, pits, poles, Vegetated dune Unlikely Insignificant Insignificant Insignificant Insignificant Low
infrastructure Beach – water supply, 2040 pumps, low voltage. buffer Unlikely Insignificant Insignificant Insignificant Insignificant Low
networks Seaview sewage, energy 2070 Unlikely Minor Insignificant Minor Minor Low
Tce and lighting 2100 Unlikely Major Insignificant Major Major High
Road network Sunshine Road reserve Erosion Now Road surfaces, Vegetated dune Unlikely Insignificant Insignificant Insignificant Insignificant Low
Beach – 2040 guttering, and buffer Unlikely Minor Insignificant Minor Minor Low
Seaview 2070 adjacent pathways Unlikely Minor Insignificant Minor Minor Low
Tce 2100 Unlikely Major Insignificant Major Major High
Sunrise & Lot 159 Open Space/ Erosion Now Dune vegetation, Vegetated dune Unlikely Moderate Minor Minor Moderate Medium
Sunshine Beach CP839188 Conservation/ beach access, & buffer
Foreshore Road Reserve SLSC tower
Reserve 2040 Dune vegetation, Unlikely Major Minor Major Major High
2070 dog exercise area, Unlikely Major Moderate Major Major High
2100 beach accesses, Unlikely Catastrophic Moderate Catastrophic Catastrophic Very High
lookouts, public
amenities, carparks
on Belmont Tce &
Tingira Cres., SLSC
tower
Ed Webb Park & Lot 126 Open Space/ Erosion Now SLSC building Vegetated dune Unlikely Moderate Insignificant Moderate Moderate Medium
Sunshine Beach CP845336 Recreation 2040 SLSC building, car buffer Unlikely Major Insignificant Major Major High
SLSC 2070 park, landscaping Unlikely Major Insignificant Catastrophic Catastrophic Very High
2100 Unlikely Major Insignificant Catastrophic Catastrophic Very High
Noosa National Lot 147 Open Space/ Erosion Now Very small area of Nil Unlikely Insignificant Minor Insignificant Minor Low
Park NPW889 Conservation 2040 dune vegetation/ Unlikely Insignificant Minor Insignificant Minor Low
2070 unformed paths Unlikely Insignificant Minor Insignificant Minor Low
2100 Unlikely Insignificant Minor Insignificant Minor Low
Noosa North South of Open Space/ Erosion Now No impact Nil Unlikely Minor Insignificant Minor Minor Low
Shore third cutting Recreation 2040 Campground eastern Unlikely Minor Insignificant Moderate Moderate Medium
Campground 2070 edge (no Unlikely Moderate Insignificant Major Major High
2100 infrastructure) Unlikely Moderate Insignificant Major Major High
Teewah [TW1] Detached Erosion Now No impact Vegetated dune Unlikely Insignificant Insignificant Insignificant Insignificant Low
Residential Area Teewah Residential 2040 buffer Unlikely Insignificant Insignificant Insignificant Insignificant Low
Township 2070 20 lots impacted; 20 Unlikely Minor Insignificant Minor Minor Low
partial
Section 58
Consequence Risk Level
Hazard Event/ Planning Existing Likelihood of Combined
Asset Name Location Asset Type Impacted Assets Environ- Adaptive
Type Horizon Controls the Hazard Community Council Consequence
mental Capacity
2100 24 lots impacted; 6 Unlikely Major Insignificant Major Major High
partial, 18 full lots
Teewah The Open Space/ Erosion Now Beach access Vegetated dune Unlikely Insignificant Insignificant Insignificant Insignificant Low
Foreshore Esplanade Recreation 2040 buffer Unlikely Insignificant Insignificant Insignificant Insignificant Low
2070 Unlikely Insignificant Insignificant Insignificant Insignificant Low
2100 Unlikely Insignificant Insignificant Insignificant Insignificant Low
Mixed [TW1] Stormwater, Erosion Now Minor stormwater Vegetated dune Unlikely Insignificant Insignificant Minor Minor Low
infrastructure Teewah water supply, 2040 and energy and buffer Unlikely Insignificant Insignificant Minor Minor Low
networks Township sewage, energy 2070 lighting assets Unlikely Minor Insignificant Minor Minor Low
and lighting 2100 Unlikely Moderate Insignificant Minor Moderate Medium
Road network [TW1] Road reserve Erosion Now Road surfaces, Vegetated dune Unlikely Insignificant Insignificant Insignificant Insignificant Low
Teewah 2040 guttering, and buffer Unlikely Insignificant Insignificant Insignificant Insignificant Low
Township 2070 adjacent pathways Unlikely Insignificant Insignificant Insignificant Insignificant Low
2100 Unlikely Minor Insignificant Insignificant Minor Low
Section 59
Consequence Risk Level Potential
Hazard Event/ Planning Existing Likelihood of Combined
Asset Name Location Asset Type Impacted Assets Environ- Adaptive Control
Type Horizon Controls the Hazard Community Council Consequence
mental Capacity Options
Lake Cooroibah, Lake Cootharaba and surrounds
1 in 20 yr ARI Now 1-2 properties Possible Insignificant Insignificant Insignificant Insignificant Low
10 partial lots
1 in 100 yr ARI Now Unlikely Insignificant Insignificant Insignificant Insignificant Low
impacted
1 in 500 yr ARI Now 10 partial lots Rare Insignificant Insignificant Insignificant Insignificant Low
1 in 20 yr ARI 2040 impacted (3 Possible Insignificant Insignificant Insignificant Insignificant Low
1 in 100 yr ARI 2040 dwellings) Unlikely Insignificant Insignificant Insignificant Insignificant Low
Storm Tide 1 in 500 yr ARI 2040 20 partial lots Rare Minor Insignificant Insignificant Minor Low
Inundation impacted (3
[Coo1] 1 in 20 yr ARI 2070 Possible Minor Insignificant Insignificant Minor Medium
dwellings)
McKinnon
Residential Detached resi & 1 in 100 yr ARI 2070 Unlikely Minor Insignificant Insignificant Minor Low
Dr &
properties (Lake acreage w/ 1 in 500 yr ARI 2070 25+ partial lots Nil Rare Minor Insignificant Insignificant Minor Low
Tingara Ct
Cooroibah) dwelling 1 in 20 yr ARI 2100 impacted (3 Possible Minor Insignificant Insignificant Minor Medium
136 lots 1 in 100 yr ARI 2100 dwellings) Unlikely Minor Insignificant Insignificant Minor Low
1 in 500 yr ARI 2100 Rare Minor Insignificant Insignificant Minor Low
4-5 partial lots
2040 Almost Certain Insignificant Insignificant Insignificant Insignificant Low
impacted
15+ partial lots
Sea Level 2070 Almost Certain Minor Insignificant Minor Minor Medium
impacted Landward
Rise
25+ partial lots building
2100 impacted (1 full Almost Certain Minor Insignificant Minor Minor Medium relocation
dwelling)
1 in 20 yr ARI Now Possible Insignificant Insignificant Minor Minor Medium
1 in 100 yr ARI Now Unlikely Insignificant Insignificant Minor Minor Low
1 in 500 yr ARI Now Rare Insignificant Insignificant Minor Minor Low
1 in 20 yr ARI 2040 Electrical assets, Possible Insignificant Insignificant Minor Minor Medium
1 in 100 yr ARI 2040 pressure and gravity Unlikely Insignificant Insignificant Minor Minor Low
1 in 500 yr ARI 2040 main Rare Insignificant Insignificant Minor Minor Low
1 in 20 yr ARI 2070 Possible Insignificant Insignificant Minor Minor Medium
1 in 100 yr ARI 2070 Unlikely Insignificant Insignificant Minor Minor Low
Stormwater,
Storm Tide 1 in 500 yr ARI 2070 Rare Insignificant Insignificant Minor Minor Low
sewage, and
[Coo1] 1 in 20 yr ARI 2100 Few stormwater Possible Insignificant Insignificant Minor Minor Medium
water supply Inundation
Critical McKinnon assets, one bridge, Low
and energy and
infrastructure Dr & electricity assets on
lighting
Tingara Ct 1 in 100 yr ARI 2100 McKinnon Drive and Unlikely Insignificant Insignificant Minor Minor
infrastructure
assets adjacent to the NE of
the neighbourhood
Few stormwater Low
assets, one bridge,
1 in 500 yr ARI 2100 Rare Insignificant Insignificant Minor Minor
electricity assets,
gravity main
2040 Lighting assets Almost Certain Insignificant Insignificant Minor Minor Medium
Sea Level
2070 Lighting, stormwater Almost Certain Insignificant Insignificant Minor Minor Medium
Rise
2100 assets Almost Certain Insignificant Insignificant Minor Minor Medium
1 in 20 yr ARI Now Possible Insignificant Insignificant Insignificant Insignificant Low
1 in 100 yr ARI Now Unlikely Insignificant Insignificant Insignificant Insignificant Low
1 in 500 yr ARI Now Rare Insignificant Insignificant Insignificant Insignificant Low
1 in 20 yr ARI 2040 Possible Insignificant Insignificant Insignificant Insignificant Low
Nil
1 in 100 yr ARI 2040 Unlikely Insignificant Insignificant Insignificant Insignificant Low
Storm Tide 1 in 500 yr ARI 2040 Rare Insignificant Insignificant Insignificant Insignificant Low
[Coo1] Inundation 1 in 20 yr ARI 2070 Possible Insignificant Insignificant Insignificant Insignificant Low
McKinnon
Road network Road network 1 in 100 yr ARI 2070 Nil Unlikely Insignificant Insignificant Insignificant Insignificant Low
Dr &
1 in 500 yr ARI 2070 Rare Insignificant Insignificant Minor Minor Low
Tingara Ct Possible inundation
1 in 20 yr ARI 2100 Possible Insignificant Insignificant Minor Minor Medium
on McKinnon Rd at
1 in 100 yr ARI 2100 Unlikely Insignificant Insignificant Minor Minor Low
Cooroibah Ck
1 in 500 yr ARI 2100 Rare Insignificant Insignificant Minor Minor Low
2040 Almost Certain Insignificant Insignificant Insignificant Insignificant Low
Sea Level
2070 Nil Almost Certain Insignificant Insignificant Insignificant Insignificant Low
Rise
2100 Almost Certain Insignificant Insignificant Insignificant Insignificant Low
Section 60
Consequence Risk Level Potential
Hazard Event/ Planning Existing Likelihood of Combined
Asset Name Location Asset Type Impacted Assets Environ- Adaptive Control
Type Horizon Controls the Hazard Community Council Consequence
mental Capacity Options
1 in 20 yr ARI Now Possible Insignificant Insignificant Insignificant Insignificant Low
1 in 100 yr ARI Now Nil Unlikely Insignificant Insignificant Insignificant Insignificant Low
1 in 500 yr ARI Now Rare Insignificant Insignificant Insignificant Insignificant Low
6 partial lots (Lake
1 in 20 yr ARI 2040 Possible Insignificant Insignificant Insignificant Insignificant Low
Cooroibah Rd)
9 partial lots (Lake
1 in 100 yr ARI 2040 Cooroibah Rd, Unlikely Insignificant Insignificant Insignificant Insignificant Low
Morning Glory Drive)
[Coo2] area 11 partial lots (Lake
bound by 1 in 500 yr ARI 2040 Cooroibah Rd, Rare Insignificant Insignificant Insignificant Insignificant Low
Lake Morning Glory Dr)
Storm Tide
Cooroibah 12 partial lots (Lake
Residential Detached resi & Inundation
Rd, Johns 1 in 20 yr ARI 2070 Cooroibah Rd, Possible Insignificant Insignificant Insignificant Insignificant Low
properties (Lake Rd & Lake acreage w/
Morning Glory Dr)
Cooroibah) Cooroibah dwelling
1 in 100 yr ARI 2070 12 partial lots (Lake Unlikely Insignificant Insignificant Insignificant Insignificant Low
Cooroibah Rd [some
95 lots (26 1 in 500 yr ARI 2070 dwellinsg], Morning Rare Insignificant Insignificant Insignificant Insignificant Low
acreage) Glory Dr)
1 in 20 yr ARI 2100 All lots north of Possible Minor Insignificant Minor Minor Medium
1 in 100 yr ARI 2100 Lakeside Park (13) Unlikely Minor Insignificant Minor Minor Low
(Lake Cooroibah Rd
1 in 500 yr ARI 2100 [some dwellings] 1 at Rare Minor Insignificant Minor Minor Low
Morning Glory Dr)
2040 Some backyard Almost Certain Insignificant Insignificant Insignificant Insignificant Low
Sea Level
2070 inundation, no Almost Certain Insignificant Insignificant Insignificant Insignificant Low
Rise
2100 dwelling inundation Almost Certain Insignificant Insignificant Insignificant Insignificant Low
1 in 20 yr ARI Now Possible Insignificant Insignificant Insignificant Insignificant Low
1 in 100 yr ARI Now Unlikely Insignificant Insignificant Insignificant Insignificant Low
1 in 500 yr ARI Now Rare Insignificant Insignificant Insignificant Insignificant Low
1 in 20 yr ARI 2040 Gravity main at Possible Insignificant Insignificant Insignificant Insignificant Low
[Coo2] area Stormwater, 1 in 100 yr ARI 2040 Lakeway Drive Unlikely Insignificant Insignificant Insignificant Insignificant Low
bound by sewage, and Storm Tide 1 in 500 yr ARI 2040 Rare Insignificant Insignificant Insignificant Insignificant Low
Lake water supply Inundation 1 in 20 yr ARI 2070 Possible Insignificant Insignificant Insignificant Insignificant Low
Critical
Cooroibah and energy and 1 in 100 yr ARI 2070 Unlikely Insignificant Insignificant Insignificant Insignificant Low
infrastructure
Rd, Johns lighting 1 in 500 yr ARI 2070 Playground, boat Rare Insignificant Insignificant Minor Minor Low
Rd & Lake infrastructure 1 in 20 yr ARI 2100 ramp, gravity and Possible Insignificant Insignificant Minor Minor Medium
Cooroibah assets 1 in 100 yr ARI 2100 pressure main at Unlikely Insignificant Insignificant Minor Minor Low
1 in 500 yr ARI 2100 Lakeway Drive Rare Insignificant Insignificant Minor Minor Low
2040 Almost Certain Insignificant Insignificant Insignificant Insignificant Low
Sea Level
2070 Nil Almost Certain Insignificant Insignificant Insignificant Insignificant Low
Rise
2100 Almost Certain Insignificant Insignificant Insignificant Insignificant Low
1 in 20 yr ARI Now Possible Insignificant Insignificant Insignificant Insignificant Low
1 in 100 yr ARI Now Unlikely Insignificant Insignificant Insignificant Insignificant Low
1 in 500 yr ARI Now Rare Insignificant Insignificant Insignificant Insignificant Low
1 in 20 yr ARI 2040 Possible Insignificant Insignificant Insignificant Insignificant Low
[Coo2] area 1 in 100 yr ARI 2040 Unlikely Insignificant Insignificant Insignificant Insignificant Low
bound by Storm Tide 1 in 500 yr ARI 2040 Rare Insignificant Insignificant Insignificant Insignificant Low
Lake Inundation 1 in 20 yr ARI 2070 Possible Insignificant Insignificant Insignificant Insignificant Low
Road network Cooroibah Road network 1 in 100 yr ARI 2070 Nil - negligible Unlikely Insignificant Insignificant Insignificant Insignificant Low
Rd, Johns 1 in 500 yr ARI 2070 Rare Insignificant Insignificant Insignificant Insignificant Low
Rd & Lake 1 in 20 yr ARI 2100 Possible Insignificant Insignificant Insignificant Insignificant Low
Cooroibah 1 in 100 yr ARI 2100 Unlikely Insignificant Insignificant Insignificant Insignificant Low
1 in 500 yr ARI 2100 Rare Insignificant Insignificant Insignificant Insignificant Low
2040 Almost Certain Insignificant Insignificant Insignificant Insignificant Low
Sea Level
2070 Almost Certain Insignificant Insignificant Insignificant Insignificant Low
Rise
2100 Almost Certain Insignificant Insignificant Insignificant Insignificant Low
Section 61
Consequence Risk Level Potential
Hazard Event/ Planning Existing Likelihood of Combined
Asset Name Location Asset Type Impacted Assets Environ- Adaptive Control
Type Horizon Controls the Hazard Community Council Consequence
mental Capacity Options
1 in 20 yr ARI Now Nil Possible Insignificant Insignificant Insignificant Insignificant Low
1 in 100 yr ARI Now Unlikely Insignificant Insignificant Insignificant Insignificant Low
1 in 500 yr ARI Now Rare Insignificant Insignificant Insignificant Insignificant Low
1-2 lots partially
1 in 20 yr ARI 2040 Possible Insignificant Insignificant Insignificant Insignificant Low
impacted Boreen
1 in 100 yr ARI 2040 Unlikely Insignificant Insignificant Insignificant Insignificant Low
[BP1] Pde
1 in 500 yr ARI 2040 Rare Insignificant Insignificant Insignificant Insignificant Low
Residential Boreen
Storm Tide 1 in 20 yr ARI 2070 Possible Insignificant Insignificant Insignificant Insignificant Low
properties (Lake Point Residential Nil
Inundation 3-4 lots partially Low
Cootharaba)
1 in 100 yr ARI 2070 impacted Boreen Unlikely Insignificant Insignificant Insignificant Insignificant
297 lots
Pde, Teewah Rd
1 in 500 yr ARI 2070 8-10 lots partially Rare Minor Insignificant Insignificant Minor Low
1 in 20 yr ARI 2100 impacted Boreen Possible Minor Insignificant Insignificant Minor Medium
1 in 100 yr ARI 2100 Pde, Woongar St, Unlikely Minor Insignificant Insignificant Minor Low
1 in 500 yr ARI 2100 Teewah Rd Rare Minor Insignificant Insignificant Minor Low
1 in 20 yr ARI Now Possible Insignificant Insignificant Insignificant Insignificant Low
1 in 100 yr ARI Now Unlikely Insignificant Insignificant Insignificant Insignificant Low
1 in 500 yr ARI Now Rare Insignificant Insignificant Insignificant Insignificant Low
Stormwater pipes,
Stormwater, 1 in 20 yr ARI 2040 Possible Insignificant Insignificant Insignificant Insignificant Low
pressure main,
sewage, and 1 in 100 yr ARI 2040 Unlikely Insignificant Insignificant Insignificant Insignificant Low
electrical assets
water supply 1 in 500 yr ARI 2040 Rare Insignificant Insignificant Insignificant Insignificant Low
Critical Boreen Storm Tide
and energy and 1 in 20 yr ARI 2070 Nil Possible Insignificant Insignificant Insignificant Insignificant Low
infrastructure Point Inundation
lighting 1 in 100 yr ARI 2070 Unlikely Insignificant Insignificant Insignificant Insignificant Low
infrastructure 1 in 500 yr ARI 2070 Stormwater pipes, Rare Insignificant Insignificant Insignificant Insignificant Low
assets 1 in 20 yr ARI 2100 pressure main, Possible Insignificant Insignificant Insignificant Insignificant Low
1 in 100 yr ARI 2100 electrical assets, Unlikely Insignificant Insignificant Insignificant Insignificant Low
pump and main at
1 in 500 yr ARI 2100 Rare Insignificant Insignificant Insignificant Insignificant Low
campgrounds
1 in 20 yr ARI Now Minimal foreshore Possible Insignificant Insignificant Insignificant Insignificant Low
1 in 100 yr ARI Now inundation Unlikely Insignificant Insignificant Insignificant Insignificant Low
Minor inundation of Low
1 in 500 yr ARI Now Rare Insignificant Insignificant Minor Minor
grounds
1 in 20 yr ARI 2040 Moderate inundation Possible Minor Minor Minor Minor Medium
1 in 100 yr ARI 2040 of grounds Unlikely Minor Minor Minor Minor Low
Boreen Point Boreen 1 in 500 yr ARI 2040 Rare Minor Moderate Moderate Moderate Medium
Open Space / Storm Tide
Campground & Point 1 in 20 yr ARI 2070 Nil Possible Minor Moderate Moderate Moderate Low
Recreation Inundation
Caravan Park (south side) 1 in 100 yr ARI 2070 Significant Unlikely Minor Moderate Moderate Moderate Medium
1 in 500 yr ARI 2070 inundation Rare Minor Moderate Moderate Moderate Low
1 in 20 yr ARI 2100 Possible Minor Moderate Moderate Moderate Medium
1 in 100 yr ARI 2100 Unlikely Moderate Moderate Moderate Moderate Medium
Near total inundation
1 in 500 yr ARI 2100 excluding main Rare Moderate Moderate Major Major High
amenities
1 in 20 yr ARI Now Possible Insignificant Insignificant Minor Minor Medium
1 in 100 yr ARI Now Unlikely Insignificant Insignificant Minor Minor Low
1 in 500 yr ARI Now Rare Insignificant Insignificant Minor Minor Low
Partial inundation of
1 in 20 yr ARI 2040 Possible Insignificant Insignificant Minor Minor Medium
Lake Flat Rd, Boreen
1 in 100 yr ARI 2040 Unlikely Insignificant Insignificant Minor Minor Low
Pde
1 in 500 yr ARI 2040 Rare Insignificant Insignificant Minor Minor Low
1 in 20 yr ARI 2070 Possible Insignificant Insignificant Minor Minor Medium
Boreen Storm Tide 1 in 100 yr ARI 2070 Unlikely Insignificant Insignificant Minor Minor Low
Road network Road network Nil
Point Inundation 1 in 500 yr ARI 2070 Partial inundation of Rare Insignificant Insignificant Minor Minor Low
1 in 20 yr ARI 2100 Lake Flat Rd (+ Possible Insignificant Insignificant Minor Minor Medium
driveway), Boreen
1 in 100 yr ARI 2100 Unlikely Insignificant Insignificant Minor Minor Low
Pde
Partial inundation of
Lake Flat Rd (+
1 in 500 yr ARI 2100 Rare Minor Insignificant Minor Minor Low
driveway), Boreen
Pde, Louis Bazzo Dr
Section 62
Consequence Risk Level Potential
Hazard Event/ Planning Existing Likelihood of Combined
Asset Name Location Asset Type Impacted Assets Environ- Adaptive Control
Type Horizon Controls the Hazard Community Council Consequence
mental Capacity Options
Localised areas
1 in 20 yr ARI Now around lakefront & Possible Insignificant Insignificant Insignificant Insignificant Low
creek fringe
1 in 100 yr ARI Now Unlikely Insignificant Insignificant Insignificant Insignificant Low
Great Sandy 1 in 500 yr ARI Now Rare Insignificant Insignificant Insignificant Insignificant Low
National Park 1 in 20 yr ARI 2040 Large areas around Possible Insignificant Minor Insignificant Minor Medium
(and other Storm Tide 1 in 100 yr ARI 2040 lakefront & creeks Unlikely Insignificant Minor Insignificant Minor Medium
related reserves Inundation 1 in 500 yr ARI 2040 Rare Insignificant Minor Insignificant Minor Medium
i.e. Wooroi Ck 1 in 20 yr ARI 2070 Possible Insignificant Minor Insignificant Minor Medium
Bushland 1 in 100 yr ARI 2070 Unlikely Minor Moderate Minor Moderate High
Reserve, 1 in 500 yr ARI 2070 Extensive areas Rare Minor Moderate Minor Moderate Low
Open Space/
Moorindil
Conservation 1 in 20 yr ARI 2100 around lakefront & Possible Minor Moderate Minor Moderate High
Reserve, Harry Various 1 in 100 yr ARI 2100 creeks Nil Unlikely Minor Moderate Minor Moderate High
(including
Spring
National Park) 1 in 500 yr ARI 2100 Rare Minor Moderate Minor Moderate Low
Conservation Lakefront & creek
Park, Cooribah fringe, large areas Habitat
Environmental 2040 around Kinaba Is & Almost Certain Insignificant Insignificant Insignificant Insignificant Low migration,
Reserve, Una southern lake tidal
Corbould Nature Permanent shorelines barrage
Reserve, Sea Level 2070 Lakefront & creek Almost Certain Minor Moderate Minor Moderate High
Boreen Point) Rise fringe, large areas
around Kinaba Is,
2100 eastern & southern Almost Certain Minor Moderate Minor Moderate High
lake shorelines, &
Lake Cooloola
The text continues on section 63.