INTEGRATEDWATERCYCLE MANAGEMENTEVALUATION STUDY PREPAREDFOR ORANGECITYCOUNCIL MAY2013 INTEGRATED WATER CYCLE MANAGEMENT EVALUATION STUDY PREPARED FOR: ORANGE CITY COUNCIL MAY 2013 POSTAL ADDRESS PO BOX 1963 ORANGE NSW 2800 LOCATION 154 PEISLEY STREET ORANGE NSW 2800 TELEPHONE 02 6393 5000 FACSIMILE 02 6393 5050 EMAIL [email protected] WEB SITE WWW.GEOLYSE.COM Report Title: IWCM EVALUATION STUDY Project: Orange City Council IWCM Client: Orange City Council Report Ref.: OCC_IWCM Evaluation Study_Final.docx Status: Final Issued: May 2013 Next review: June 2018 Cover Photos: Main – Suma Park Reservoir (Source: Kerry Fragar) Top – Discharge of first harvested stormwater into Suma Park Reservoir (Source: OCC) Middle – Orange STP Trickling Filter (Source: OCC) Bottom – Suma Park Dam (Source: Kerry Fragar) This report has been prepared by Geolyse Pty Ltd for Orange City Council and may only be used and relied on by Orange City Council for the purposes for which it was prepared. The preparation of this report has been in accordance with the project brief provided by the client and has relied upon the information, data and results provided or collected from the sources and under the conditions outlined in the report. Geolyse otherwise disclaims responsibility to any person other than Orange City Council for liability howsoever arising from or in connection with this report. Geolyse also excludes implied warranties and conditions, to the extent legally possible. The opinions, conclusions and recommendations in this report are based on conditions encountered and information reviewed at the date of preparing this report. Geolyse has no responsibility or obligation to update this report to account for events or changes occurring subsequent to the date that the report was prepared. Geolyse reserves the right, at any time with or without notice, to amend, modify or retract any part or all of the report including any opinions, conclusions, or recommendations contained therein. Unauthorised use of this report in any form whatsoever is strictly prohibited. IWCM EVALUATION STUDY ORANGE CITY COUNCIL OCC_IWCM EVALUATION STUDY_FINAL.DOCX TABLE OF CONTENTS ABBREVIATIONS ..................................................................................................... VI INTRODUCTION ........................................................................................................ 1 1.1 WHAT IS IWCM? ................................................................................................................ 1 1.2 WHAT DOES IWCM INVOLVE? ........................................................................................ 1 1.3 THE ORANGE IWCM JOURNEY ....................................................................................... 1 1.4 EVALUATION STUDY STRUCTURE ................................................................................. 3 1.5 2007 CONCEPT STUDY APPROVAL ................................................................................ 4 1.6 COMMENTS ON FINAL DRAFT ........................................................................................ 5 IWCM TARGETS ....................................................................................................... 6 2.1 WHAT ARE IWCM TARGETS? .......................................................................................... 6 2.2 IWCM TARGETS ................................................................................................................ 7 2.3 COMMUNITY OBJECTIVES .............................................................................................. 9 2.4 ISSUES REFERRED TO OTHER AGENCIES ................................................................ 11 DATA AND INFORMATION .................................................................................... 12 3.1 THE ORANGE CATCHMENT .......................................................................................... 12 3.1.1 LOCATION ........................................................................................................ 12 3.1.2 LANDSCAPE CHARACTERISTICS .................................................................. 15 3.1.2.1 SOILS ................................................................................................. 15 3.1.2.2 LANDFORM ....................................................................................... 15 3.1.2.3 VEGETATION .................................................................................... 15 3.1.3 CLIMATE ........................................................................................................... 17 3.1.3.1 RAINFALL .......................................................................................... 17 3.1.3.2 TEMPERATURE ................................................................................ 18 3.1.3.3 EVAPORATION ................................................................................. 19 3.1.3.4 DROUGHTS ....................................................................................... 19 3.1.3.5 FLOODS ............................................................................................ 20 3.1.4 CLIMATE CHANGE........................................................................................... 20 3.1.5 LAND USES ...................................................................................................... 21 3.1.6 MAIN POPULATION CENTRES ....................................................................... 21 3.1.7 MAIN CATCHMENT WATER USES ................................................................. 21 3.1.8 LICENSED ACTIVITIES .................................................................................... 22 3.1.9 SENSITIVE AREAS........................................................................................... 23 3.1.9.1 FLOODING ........................................................................................ 23 3.1.9.2 ENVIRONMENTAL SENSITIVITY ..................................................... 24 3.1.10 LAND USE PLANNING ..................................................................................... 25 3.1.11 REGIONAL PLANS ........................................................................................... 26 3.2 WATER RESOURCES ..................................................................................................... 26 3.2.1 SECURE YIELD ................................................................................................ 27 3.2.2 EXISTING WATER RESOURCES .................................................................... 28 3.2.2.1 ORANGE ............................................................................................ 28 3.2.2.2 SPRING HILL AND LUCKNOW ......................................................... 36 3.2.3 FUTURE WATER RESOURCES ...................................................................... 36 3.3 URBAN ENVIRONMENT .................................................................................................. 42 3.3.1 LOCAL COMMUNITY........................................................................................ 42 3.3.1.1 AREAS SERVICED............................................................................ 42 3.3.1.2 POPULATION .................................................................................... 42 3.3.1.3 POPULATION PROJECTIONS ......................................................... 44 3.3.1.4 TOURISM ........................................................................................... 45 3.3.1.5 HOUSING .......................................................................................... 45 3.3.1.6 EMPLOYMENT .................................................................................. 47 3.3.1.7 DEVELOPMENT IN ORANGE ........................................................... 47 IWCM EVALUATION STUDY PAGE I ORANGE CITY COUNCIL OCC_IWCM EVALUATION STUDY_FINAL.DOCX 3.3.1.8 NUMBER AND TYPE OF COMMERCIAL BUILDINGS .................... 48 3.3.1.9 SIGNIFICANT INDUSTRIES ............................................................. 49 3.3.1.10 WATER SERVICE CUSTOMERS ..................................................... 50 3.3.1.11 BUSINESS AND COMMERCIAL ACTIVITY ..................................... 52 3.3.2 URBAN WATER SUPPLY ................................................................................. 52 3.3.2.1 ORANGE ............................................................................................ 52 3.3.2.2 SPRING HILL AND LUCKNOW WATER SUPPLY ........................... 63 3.3.2.3 RAINWATER TANKS......................................................................... 67 3.3.2.4 WATER ASSET MANAGEMENT ...................................................... 68 3.3.2.5 WATER SYSTEM MANAGEMENT ................................................... 69 3.3.3 SEWERAGE ...................................................................................................... 74 3.3.3.1 ORANGE ............................................................................................ 74 3.3.3.2 SPRING HILL AND LUCKNOW ......................................................... 80 3.3.3.3 SEWERAGE ASSET MANAGEMENT PLAN .................................... 82 3.3.3.4 SEWERAGE SYSTEM MANAGEMENT............................................ 83 3.3.4 STORMWATER ................................................................................................. 85 3.3.4.1 STORMWATER SYSTEMS ............................................................... 85 3.3.4.2 STORMWATER