Hervey Bay Water Supply Strategy 2009
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Hervey Bay Water Supply Strategy 2009 2 | Page TABLE OF CONTENTS 1.0 INTRODUCTION ............................................................................................................................................................ 4 1.1 Study Area .................................................................................................................................................................... 4 2.0 OBJECTIVES .................................................................................................................................................................. 5 2.1 Objectives of the Study ................................................................................................................................................ 5 2.2 Standards of Service ..................................................................................................................................................... 5 3.0 EXISTING SYSTEM ......................................................................................................................................................... 6 3.1 System Overview .......................................................................................................................................................... 6 3.2 Bulk Supply System Performance ................................................................................................................................ 8 3.3 Distribution System ...................................................................................................................................................... 8 3.4 Reticulation Network ................................................................................................................................................... 9 4.0 POPULATION PROJECTIONS AND WATER DEMAND .................................................................................................. 10 4.1 Existing ED Demand ................................................................................................................................................... 10 4.2 Future ED Demand ..................................................................................................................................................... 10 4.3 Demand Allocation ..................................................................................................................................................... 10 4.4 Demand Types............................................................................................................................................................ 11 4.5 Peaking Factors .......................................................................................................................................................... 11 4.6 Diurnal Profiles ........................................................................................................................................................... 11 5.0 RAW WATER SOURCE ................................................................................................................................................. 14 5.1 Lenthall Dam .............................................................................................................................................................. 14 5.2 Mary River .................................................................................................................................................................. 15 5.3 Burnett River .............................................................................................................................................................. 17 5.4 Fraser Island ............................................................................................................................................................... 18 5.5 Groundwater .............................................................................................................................................................. 31 5.6 Desalination ............................................................................................................................................................... 31 5.7 Indirect Potable Reuse ............................................................................................................................................... 33 6.0 TREATMENT ............................................................................................................................................................... 36 6.1 Howard Water Treatment Plant ................................................................................................................................ 36 6.2 Burgowan ................................................................................................................................................................... 38 6.2.1 Dynasand Filtration Plant ............................................................................................................................... 38 6.2.2 Ozone/BAC Plant ............................................................................................................................................ 38 7.0 TRUNK DISTRIBUTION ................................................................................................................................................ 41 7.1 Pump Stations ............................................................................................................................................................ 41 7.2 Reservoirs ................................................................................................................................................................... 43 8.0 OPTIONS REVIEW ....................................................................................................................................................... 47 8.1 Raw Water Source ...................................................................................................................................................... 47 8.2 Treatment .................................................................................................................................................................. 49 8.3 Trunk Distribution ...................................................................................................................................................... 50 8.4 Reticulation ................................................................................................................................................................ 51 9.0 20 YEAR CAPITAL WORKS PROGRAM ......................................................................................................................... 53 9.1 Unit Rates for Water Mains ....................................................................................................................................... 53 9.2 Proposed Capital Works Programme ......................................................................................................................... 54 10.0 CONCLUSIONS AND RECOMMENDATIONS ................................................................................................................ 57 10.1 Conclusions ................................................................................................................................................................ 57 10.2 Recommendations ..................................................................................................................................................... 57 3 | Page 1.0 INTRODUCTION Previous water supply infrastructure planning for the Hervey Bay network was completed in 2001 by Cardno MBK under the Hervey Bay Strategic Water Supply Planning Report and followed with an Addendum report that was completed in 2004. Population growth and development has continued to occur in the Hervey Bay region since that report was adopted, which has necessitated that the existing and projected water supply infrastructure needs of the City be reassessed in view of revised populations, water consumption figures and projected development sequences. Population density, as an Equivalent Dwelling (ED), has increased by 4.1% to that identified in the 2004 addendum report, but water consumption per dwelling has decreased by 24.8% due primarily to: 1. Demand management principles developed and implemented by Wide Bay Water Corporation 2. Public Education on water use 3. Public awareness and response to drought management This Water Supply Strategy’s main objective has been to evaluate the existing water supplies capacity to meet projected population growth and water consumption and to identify infrastructure augmentations required to satisfactorily manage these demands to the year 2031, with major infrastructure to 2040. A major part of the investigation included the reassessment of the water supply requirements to those areas of the existing network that are developing at a rate significantly greater than was previously planned. The primary objectives of this Report are to: 6 Assess the existing water supply demand based on recently recorded flow data with the current demand management regimes in place; 6 Assess the projected water supply demand, up to 2031, based on revised population projections undertaken by Fraser Coast Regional Council and the Planning Information and Forecasting Unit (PIFU; Queensland Dept of Local Government