20517 App K.pdf [As Published] · 132007.1259

Page 2

SUCCESS sous Partnership
SUCCESS tron People

JWP

SCANLON PROPERTY GROUP

 

Essence of Peregian, Noosa
Water Supply Analysis

JUNE 2007

 

Page 3

 

@

JWP

 

 

Scanton Property Group

Essence of Peregian,
Noosa
Water Supply Analysis

June 2007

John Wilson and Partners Pty Ltd
A.B.N. 85 011 022 503

Level 9 Centenary Square,

100 Wickham Street

Brisbane 4000

 

 

 

 

 

Telephone: (07) 3244 9600
Facsimile: (07) 3244 9699
Email: [email protected]
Document Control
Revision Author Reviewer Approved for Issue
Name Signature Date
0 S. Bedi A. Morris N.Cartwright 25/05/07
1 S. Bedi A. Morris N.Cartwright 20/06/07

 

 

 

 

 

 

 

© John Wilson and Partners Pty Ltd 2007
This document shall remain the property of John Wilson and Partners Pty Ltd.
Unauthorised use of this document in any form is prohibited.

 

SCANLON PROPERTY GROUP JUNE 2007
ESSENCE OF PEREGIAN, NOOSA —- WATER SUPPLY ANALYSIS REVISION 1
2:\38-water\070245-001 essence of peregian ws\water analysis\report\essence of peregian_report_revi.doc

Page 4

JwPp

CONTENTS

 

B

1 INtrOdUCtiOn sisscieisnicccsnisnnnascnanessscnawennanensennonmsneas cadrensnenewtnnsenreceusseressareasasbenavcaas

2 Proposed Development .

 

 
 
 
 
  
  
 
 
 
 
 
 

2.1 Scope of Analysis..
2.2 Development Demand

3 Water Supply..
3.1 Design Criteria

3.2 Existing Water Supply System..
3.3. Bulk Water Supply Impacts

4 Network Analysis and Results

  

4.1 Design Cases ..
4.2 Existing System Analysi:
4.3 Ultimate System Analysis
4.4 Effects on Existing Customers .
4.5 Internal Water Reticulation Sizing.

5 Summary

 

 

 

® Voaoouu uv aww WNN WN

6 Qualification ..

 

 

Appendices

Appendix A Existing System — Network Results

Appendix B Ultimate System — Network Results

SCANLON PROPERTY GROUP JUNE 2007
ESSENCE OF PEREGIAN, NOOSA — WATER SUPPLY ANALYSIS REVISION 1

2:\38-water\070245-001 essence of peregian ws\water analysis\report\essence of peregian_report_rev1.doc

Page 5

Scanlon Property Group @

° JwP
Essence of Peregian, Noosa

Water Supply Analysis

 

1 Introduction

A Caravan Park redevelopment adjacent to David Low Way, Peregian is proposed and will consist of
103 Residential Units and 1956m‘? of Retail and Office Floor Space.

This report analyses the Noosa Shire water supply reticulation network in Noosa Water Supply Zone
(WSZ) to ensure that the system provides Maximum Hour (MH) demand and Fire-Fighting flow
within the development in compliance with the Noosa Shire (NS) desired Level of Service (LOS) and
does not disadvantage existing customers within the zone.

To ensure LOS are maintained across all planning horizons, the proposed development has been
analysed for the Existing (2005) and Headworks (Ultimate) Noosa Shire water supply system.

This report:

e Summarises the analyses carried out;

e Sizes the internal reticulation of the proposed development;

e Assesses MH demand and desired fire-fighting flow within the development;

e Assesses the performance of the Existing (2005) and Headworks (Ultimate) Noosa Shire

water supply systems in the Coastal WSZ in relation to servicing the additional demand
from the proposed development.

 

SCANLON PROPERTY GROUP JUNE 2007
ESSENCE OF PEREGIAN, NOOSA — WATER SUPPLY ANALYSIS REVISION 1
z:\38-water\070245-001 essence of peregian ws\water analysis\report\essence of peregian_report_rev1.doc 1

Page 6

JwpP

 

2 Proposed Development
2.1 Scope of Analysis

The following analysis has been performed utilising an HJOMap model developed as part of the
Noosa Council District Metered Areas Pressure Management Study (JWP, 2006). It should be noted
that this report concerns the water demand from the proposed development at David Low Way,
Peregian in isolation.

The Noosa Ultimate Water Supply Existing (2005) and Ultimate models used in this assessment do
not contain demands from recently proposed and approved developments outside of the proposed
Essence of Peregian development. These models do however contain areas of future growth
potential and augmentations to the water supply network as detailed in the Noosa Ultimate Water
Supply.

This assessment has assessed technical matters only. The servicing of the land by the water supply
systems will ultimately require Council approval. Likewise any system augmentations suggested
will again require the approval of Council and should not be regarded as being representative of
Council's position.

2.2 Development Demand

The subject land is approximately 2.56 hectares in area and will consist of Visitor Accommodation
Units, Accommodation Shacks, Caretaker’s Residence, Retail and Office Floor Space. The
development will become part of the Peregian Water Supply Zone.

A representation of the demand for Existing and Ultimate planning horizons from the proposed
development is detailed in Table 2.1.

Noosa Shire adopts an Equivalent Tenement (ET) as the basis for water supply infrastructure
planning. Based on the land use information provided by the Developer, the appropriate occupancy
rates for the proposed development are detailed in Table 2.1.

Table 2.1 Proposed Development EP Water Demand

 

 

 

No. ws
p . Area Unit Demand Demand
Unit Type of Dwellings
Units (ha) (ET) (ET)
ee 66 - - 0.84 ET/unit 55.44
Accommodation .
Shack 34 - a 0.9 ET/unit 30.90
Caretaker’s .
Residence = 1 - 1 ET/dwelling 1
Retail
Floor Space - - 0.0978 24.24 ET/ha 2.37
Ornice - ; 0.0978 24.24 ET/ha 2.37
Floor Space
Total 92.08

 

The parcel of land is located within NSC Headworks boundaries and has been allocated a demand of
68.47 ET for Ultimate planning and as such the proposed demand exceeds the allocated demand.

 

SCANLON PROPERTY GROUP JUNE 2007
ESSENCE OF PEREGIAN, NOOSA — WATER SUPPLY ANALYSIS REVISION 1
z:\38-water\070245-001 essence of peregian ws\water analysis\report\essence of peregian_report_rev1.doc 2

Page 7

Jwp

 

3 Water Supply

3.1 Design Criteria

The reticulation network has been assessed based on design criteria, which are in general
consistent with the Water Resources Commission Guidelines for Planning and Design of Urban
Water Supply Schemes (DNR, 1997). Analyses have been performed to assess the capacity of the
Existing and Headworks water networks in delivering the desired Noosa Shire (Levels of Service)
LOS to the point of connection of the proposed development. The Noosa Shire design criteria
adopted for this investigation are: -

1. Existing and Headworks Average Day (AD) water demands of 1100 L/ET/day of Noosa Heads
Region Coastal Water Supply Zone.

2. Maximum Hour (MH):AD peaking factor of 3.6 for residential properties and 2.7 for commercial
properties in the Coastal WSZ areas;

3. Under MH demand, residual heads at all nodes within the proposed subdivisions and
surrounding areas are to be equal to or greater than 22m or 16m in small, isolated, highly
elevated land parcels.

4. The reticulation should be capable of providing fire flow of 15 L/s for residential areas
concurrent with MH flow with the residual pressure in the system not falling below 12 m.;

5. Fire Flow services for commercial properties are not to fall below 12m residual pressure;
6. Reservoirs are not to empty during three consecutive Maximum Days (MD); and

7. Pump Stations are to supply MDMM demand in 20 hours/day operation.

3.2 Existing Water Supply System

The proposed development is located in the Peregian WSZ. The Peregian Reservoir (TWL RL 65.0m)
is located adjacent to David Low Way, Noosa. The Viewland Drive Pumping Station, located at the
Viewland Drive reservoir site, provides 20hr Mean Day Maximum Month (MDMM) flow to the
Laguna Reservoir.

The development will be serviced from the Peregian WSZ via an existing 150mm diameter main
within David Low Way.

 

SCANLON PROPERTY GROUP JUNE 2007
ESSENCE OF PEREGIAN, NOOSA — WATER SUPPLY ANALYSIS REVISION 1
z:\38-water\070245-001 essence of peregian ws\water analysis\report\essence of peregian_report_revi doc 3

Page 8

©

JWwP

 

3.3 Bulk Water Supply Impacts

The demand from the proposed development exceeds the allocation for the subject site (68.47 ET)
and thus, a bulk water analysis is required. Table 3.1 details the augmentations for the supply
zone.

 

 

Table 3.1 Additional Capacities Required for Proposed Development
Proposed Additional Additional Additional
Reservoir Pump Station
Demand Demand
(ET) (ET) Storage Flow
(ML) (L/s)
92.08 23.61 0.039 ML 0.50 L/s

 

Analysis has been performed on the bulk water transfer infrastructure supplying the development.
This includes analysis of:

e MD demand upon Laguna and Viewland Drive Reservoirs

e MDMM demand upon the Tewantin Pump Stations

The results on the Bulk Water analysis indicate that the network performs to a satisfactory standard
for MD and MDMM flows.

 

SCANLON PROPERTY GROUP JUNE 2007
ESSENCE OF PEREGIAN, NOOSA —- WATER SUPPLY ANALYSIS REVISION 1
z:\38-water\070245-001 essence of peregian ws\water analysis\report\essence of peregian_report_rev1.doc 4

Page 9

JwP

 

4 Network Analysis and Results

4.1 Design Cases

The demand from the proposed residential development was added to the H2OMap network models
of the Existing (2005) and Headworks (Ultimate) Noosa Shire water supply systems.

The following analyses have been performed:

1. A dynamic analysis under MH conditions for the Existing (2005) system, with the demand from
the proposed development.

2. A static analysis under Fire Flow conditions (30L/s) for the Existing system, with the demand
from the proposed development.

3. A dynamic analysis under MH for the Headworks system, with the demand from the proposed
development.

4. Astatic analysis under Fire Flow conditions (30L/s) for the Headworks system, with the demand
from the proposed development.

4.2 Existing System Analysis

The results for the proposed development from the Noosa Shire water supply network during MH
demand and under Fire Fighting conditions for the Existing system are given in Tables 4.1 and 4.2
respectively. The proposed internal reticulation and node identities are shown in Figure 1 and
Appendix A provides the results for the development demand nodes.

Table 4.1 Results under Maximum Hour Conditions at the Critical Node within the
Existing System

 

 

 

 

 

Node Pressure Acceptance
Identifier HGL (m) (m) Criteria Result
EPL 64.47 54.47 > 22m Satisfactory
Table 4.2 Results under Fire Flow Conditions at the Critical Node within the Existing
System
: Residual
Node Fire Flow Acceptance
Identifier (L/s) Btescute Criteria Bene
(m)
EP1 30 42.39 > 12m Satisfactory

 

The above analysis demonstrates that the Existing Noosa Shire water supply system is capable of
supplying the development in accordance with the design criteria.

 

SCANLON PROPERTY GROUP JUNE 2007
ESSENCE OF PEREGIAN, NOOSA — WATER SUPPLY ANALYSIS REVISION 1
z:\38-water\070245-001 essence of peregian ws\water analysis\report\essence of peregian_report_revi.doc 5

Page 10

@

JWwP

 

4.3 Ultimate System Analysis

The results for the proposed development from the Noosa Shire water supply network during MH
demand and under Fire Fighting conditions for the Ultimate are given in Table 4.3 and Table 4.4
respectively. The proposed internal reticulation and node identities are shown in Figure 1 and
Appendix B provides the results for the development demand nodes.

Table 4.3 Results under Maximum Hour Conditions at the Point of Connection within
the Ultimate System

 

 

 

 

 

Node HGL Pressure Acceptance Result
Identifier (RL m) (m) Criteria
EP1 64.44 54.44 > 22m Satisfactory
Table 4.4 Results under Fire Flow Conditions at the Point of Connection within the
Ultimate System
‘, Residual
Node Fire Flow Acceptance
Identifier (L/s) ea. Ls Criteria Result
EPL 30 39.66 > 12m Satisfactory

 

The above analysis demonstrates that the Headworks (Ultimate) Noosa Shire water supply system
is capable of supplying the development in accordance with the design criteria.

4.4 Effects on Existing Customers

The proposed development does not significantly impact on the capacity of surrounding areas and
does not contravene the principle of “no disadvantage” to existing customers.

4.5 Internal Water Reticulation Sizing

Due to the group title venture of the proposed development no internal reticulation no internal
reticulation is required to be assessed as part of this analysis.

 

SCANLON PROPERTY GROUP JUNE 2007
ESSENCE OF PEREGIAN, NOOSA — WATER SUPPLY ANALYSIS REVISION 1
z:\38-water\070245-001 essence of peregian ws\water analysis\report\essence of peregian_report_revi.doc 6

Page 11

@

JWP

 

5§ Summary

A development at Essence of Peregian, Noosa is proposed and a water supply analysis has been
performed. The proposed development and will be serviced by the Peregian WSZ.

The results from the water supply analysis are summarised below:

1. The Peregian WSZ reservoir and Tewantin pump station have adequate capacity to service the
proposed subdivision within the Noosa WSZ for Existing and Ultimate conditions.

2. Sufficient capacity exists within the Noosa Shire water supply system to provide Noosa Shire
LOS to the proposed development for Existing and Ultimate conditions.

3. The proposed development does not significantly impact on the capacity of the Peregian WSZ
and does not contravene the principle of “no disadvantage” to existing customers.

 

SCANLON PROPERTY GROUP JUNE 2007
ESSENCE OF PEREGIAN, NOOSA - WATER SUPPLY ANALYSIS REVISION 1
z:\38-water\070245-001 essence of peregian ws\water analysis\report\essence of peregian_report_rev1.doc 7

Page 12

@

Jwp

 

6 Qualification

sits In preparing the report and estimate of costs JWP has exercised the degree of skill and care
and diligence normally exercised by members of the engineering profession and has acted
in accordance with accepted practices of engineering design principles.

2 JwP has used all reasonable endeavours to inform itself of the parameters and
requirements of the project and has taken all reasonable steps to ensure that the report
and costs estimate is as accurate and comprehensive as possible given the information
upon which it is based.

3. It is not intended that this report and costs estimate represent a final assessment of the
feasibility of the project.

4. JWP reserves the right to review and amend all calculations, cost estimates and/or opinions
included or referred to in the report if:

(a) additional sources of information not presently available (for whatever reason) are
provided or become known to JWP; or

(b) JWP considers it prudent to revise the estimate in light of any information which
becomes known to it after the date of submission.

5. This report and cost estimate is for the use of the party to whom it is addressed and for no
other persons. No responsibility is accepted to any third party for the whole or part of the
contents of this report and cost estimate.

6. If any claim or demand is made by any person against JWP on the basis of detriment
sustained or alleged to have been sustained as a result of reliance upon the report and cost
estimate or information therein, JWP will rely upon this provision as a defence to any such
claim or demand.

 

SCANLON PROPERTY GROUP JUNE 2007
ESSENCE OF PEREGIAN, NOOSA - WATER SUPPLY ANALYSIS REVISION 1
z:\38-water\070245-001 essence of peregian ws\water analysis\report\essence of peregian_report_revi.doc 8

Page 13

 

 

 

JWwP
Figures

SCANLON PROPERTY GROUP JUNE 2007
ESSENCE OF PEREGIAN, NOOSA — WATER SUPPLY ANALYSIS REVISION 1

2:\38-water\070245-001 essence of peregian ws\water analysis\report\essence of peregian_report_revi.doc

Page 14

 

 

eE9GrHze “XeY ooserrze “Ud
900 GIO Aaijen apnatiog ‘SBS XOG Od
£05 720 TTO SB. Nav
“PIT “Aag Su@u}eg pue UOSiIM UYOr

dMf

 

 

qulod
uonseuu0D pasodoig
Ajddng aaqen

TE 3YuNndIs

VSOON
NVISSuad
A0 |
SON3SS4

 

 

 

BjLIS 0} JON

 

 

 

   

   

\

 

La3uLS SNOdNU

 

Asepunog
quewdojanaq
pasodouig

 

aNa9a1

 

 

 

 

 

 

 

Page 15

JwP

APPENDIX A

 

 

Existing System — Network Results

 

SCANLON PROPERTY GROUP JUNE 2007
ESSENCE OF PEREGIAN, NOOSA — WATER SUPPLY ANALYSIS REVISION 1
z:\38-water\070245-001 essence of peregian ws\water analysis\report\essence of peregian_report_rev1.doc

Page 16

 

 

 

 

JwPp
Table Ai - Proposed Development Network Results
Identifier Maximum Hour Fire Flow
Node Elevation Demand Grade Pressure Fireflow Residual
Demand Pressure
ID (m) (L/s) (m) (m) (L/s) (m)
4475 10 0.31 64.47 54.47 15 46.55
4485 10.13 0.22 64.47 54.34 15 44.28
4487 11.44 0.01 64.47 53.04 15 45.7
4489 9.41 0.03 64.47 55.06 30 43,91
4491 18 0.18 64.47 46.47 30 30.37
4493 13 0.1 64.47 51.47 15 44.12
4495 12.42 0 64.47 52.06 x :
4497 10.42 0.1 64.47 54.05 15 41.59
EPi 10 1 64.47 54.47 30 42.39
SCANLON PROPERTY GROUP JUNE 2007
ESSENCE OF PEREGIAN, NOOSA - WATER SUPPLY ANALYSIS REVISION 1

2:\38-water\070245-001 essence of peregian ws\water analysis\report\essence of peregian_report_rev1.doc

Page 17

Jwp

APPENDIX B

 

 

Ultimate System — Network Results

 

SCANLON PROPERTY GROUP JUNE 2007
ESSENCE OF PEREGIAN, NOOSA — WATER SUPPLY ANALYSIS REVISION 1
2:\38-water\070245-001 essence of peregian ws\water analysis\report\essence of peregian_report_rev1.doc

Page 18

 

 

 

 

JWwP
Table B1 - Proposed Development Ultimate Network Results
Identifier Maximum Hour Fire Flow
Node Elevation Demand Grade Pressure Fireflow Residual
Demand Pressure
ID (m) (L/s) (m) (m) (L/s) (m)
4475 10 0.29 64.44 54.44 15 44.44
4485 10.13 0.67 64.43 54.3 15 41.36
4487 11.44 0.02 64.45 53.01 15 43.57
4489 9.41 0.03 64.44 55.03 30 41.42
4491 18 0.26 64.44 46.44 30 27.98
4493 13 0.17 64.45 51.44 15 41.99
4495 12.42 0 64.45 52.03 S =
4497 10.42 0.15 64.43 54.01 15 38.61
EP1i 10 1 64.44 54.44 30 39.66
SCANLON PROPERTY GROUP JUNE 2007
ESSENCE OF PEREGIAN, NOOSA — WATER SUPPLY ANALYSIS REVISION 1

z:\38-water\070245-001 essence of peregian ws\water analysis\report\essence of peregian_report_rev1.doc