Inquiry Into Flood Mitigation Infrastructure in Victoria.Pdf 2.73 Mb
Total Page:16
File Type:pdf, Size:1020Kb
Spine width 13mm ENVIRONMENT AND NATURAL RESOURCES COMMITTEE ENVIRONMENT AND NATURAL ENVIRONMENT AND NATURAL RESOURCES COMMITTEE PARLIAMENT PARLIAMENT Inquiry into Flood Mitigation Infrastructure in Victoria INQUIRY INTO FLOOD MITIGATION INFRASTRUCTURE IN VICTORIA INTO FLOOD MITIGATION INQUIRY OF VICTORIA AUGUST 2012 AUGUST 2012 ENVIRONMENT AND NATURAL RESOURCES COMMITTEE PARLIAMENT HOUSE, SPRING STREET MELBOURNE VIC 3000 T 8682 2803 F 8682 2818 www.parliament.vic.gov.au/enrc ENVIRONMENT AND NATURAL RESOURCES COMMITTEE INQUIRY INTO FLOOD MITIGATION INFRASTRUCTURE IN VICTORIA AUGUST 2012 Ordered to be printed Victorian Government Printer 2012 Parliamentary Paper No.169 Session 2010–2012 INQUIRY INTO FLOOD MITIGATION INFRASTRUCTURE IN VICTORIA Parliament of Victoria Environment and Natural Resources Committee INQUIRY INTO FLOOD MITIGATION INFRASTRUCTURE IN VICTORIA ISBN 978‐0‐9807561‐3‐5 This report was printed on 100 per cent recycled paper Printer: On‐Demand Pty Ltd Cover design: QBee Art & Design Cover image Newspix/News Ltd, reproduced with permission Nathalia, Victoria – March 9, 2012 Photographer: Chris Scott Table of contents List of figures ......................................................................................................................... vi List of tables .......................................................................................................................... vi Committee members ............................................................................................................ vii Terms of reference ................................................................................................................ ix Chair’s foreword .................................................................................................................... xi Executive summary ............................................................................................................. xiii Recommendations .............................................................................................................. xix Glossary ............................................................................................................................. xxix Acronyms and abbreviations ........................................................................................... xxxiii CHAPTER ONE ............................................................................................ 1 Introduction .............................................................................................................. 1 1.1 Background to the inquiry ......................................................................................... 1 1.2 Inquiry process ........................................................................................................... 2 1.3 International Conference on Flood Management ..................................................... 3 1.4 Key issues raised during the inquiry .......................................................................... 4 1.5 Inquiry report ............................................................................................................. 5 CHAPTER TWO ........................................................................................... 7 Flooding in Victoria ................................................................................................... 7 2.1 Introduction ............................................................................................................... 7 2.2 Flooding as a natural phenomenon ........................................................................... 8 2.3 History of Victorian floods ......................................................................................... 9 2.4 2010–2011 floods and their impacts ....................................................................... 10 2.5 2012 floods and their impacts ................................................................................. 15 2.6 Legislative and policy basis for flood mitigation, monitoring and waterways management ............................................................................................................ 15 2.6.1 Legislation .............................................................................................................. 15 2.6.2 Policy, strategies and programs ............................................................................. 16 2.7 Roles and responsibilities for flood mitigation, flood monitoring and waterway management ............................................................................................................ 19 2.7.1 Commonwealth Government ................................................................................. 19 2.7.2 Department of Sustainability and Environment ..................................................... 19 2.7.3 Department of Planning and Community Development ........................................ 20 – i – INQUIRY INTO FLOOD MITIGATION INFRASTRUCTURE IN VICTORIA 2.7.4 Catchment management authorities and Melbourne Water ................................. 20 2.7.5 Local government ................................................................................................... 22 2.7.6 Rural water authorities .......................................................................................... 23 2.8 Essential services: Legislation and policy .................................................................. 23 2.9 Conclusion ................................................................................................................. 24 CHAPTER THREE ........................................................................................ 25 Flood risk management: Best practice mitigation and monitoring ........................... 25 3.1 Introduction .............................................................................................................. 25 3.2 Flood mitigation and floodplain management ......................................................... 26 3.3 Flood mitigation and risk .......................................................................................... 28 3.4 Evolution of flood management practice in Australia .............................................. 31 3.5 Best practice floodplain management ...................................................................... 32 3.5.1 Floodplain management process ........................................................................... 32 3.5.2 Floodplain management measures ........................................................................ 34 3.5.3 Structural measures ............................................................................................... 35 3.5.4 Land use controls ................................................................................................... 40 3.5.5 Development and building controls ....................................................................... 41 3.5.6 Flood emergency measures .................................................................................... 42 3.6 Conclusion ................................................................................................................. 46 CHAPTER FOUR ......................................................................................... 47 Levees: Ownership, management and maintenance responsibilities ....................... 47 4.1 Introduction .............................................................................................................. 49 4.2 Overview of levee construction, maintenance and auditing .................................... 50 4.3 Urban levees ............................................................................................................. 52 4.3.1 Modern urban levees ............................................................................................. 53 4.3.2 Older urban levees ................................................................................................. 55 4.4 Rural levees ............................................................................................................... 57 4.4.1 Rural levees with government involvement ........................................................... 57 4.4.2 Stakeholder views about rural levees with government involvement .................... 60 4.4.3 Private rural levees ................................................................................................. 60 4.5 Levees: The basis of responsibility ............................................................................ 61 4.5.1 Principles for identifying responsible parties.......................................................... 62 4.6 Future levee management arrangements ................................................................ 65 4.6.1 Prioritising levees for future management and maintenance ................................ 66 – ii – TABLE OF CONTENTS 4.6.2 Managing priority levees with beneficiary support ............................................... 67 4.6.3 Managing levees identified as of lower priority ..................................................... 69 4.7 Access to different land tenures .............................................................................. 71 4.8 Streamlining the approval process .......................................................................... 72 4.9 Funding of levees ....................................................................................................