Harborough District Council Level 1 Strategic Flood Risk Assessment Final Report April 2009
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Harborough District Council Level 1 Strategic Flood Risk Assessment Final Report April 2009 Prepared for: Harborough District Council Strategic Flood Risk Assessment D119550 Revision Schedule Harborough District Council Level 1 Strategic Flood Risk Assessment Final Report April 2009 Rev Date Details Prepared by Reviewed by Approved by 0 December 08 Interim Draft Nicola Bell Michael Timmins Kerry Whalley Planner Principal Flood Risk Associate Specialist Helen Burton Assistant Flood Risk Specialist Zoe Hall Senior Flood Risk Specialist A February 09 Final Draft Nicola Bell Michael Timmins Kerry Whalley Planner Principal Flood Risk Associate Specialist Helen Burton Assistant Flood Risk Specialist Jo Chesters Senior Flood Risk Specialist B April 09 Final Report Nicola Bell Michael Timmins Kerry Whalley Planner Principal Flood Risk Associate Specialist Helen Burton Assistant Flood Risk Specialist Jo Chesters Senior Flood Risk Specialist Scott Wilson WestOne Wellington Street Leeds LS1 1BA This document has been prepared in accordance with the scope of Scott Wilson's appointment with its client and is subject to the terms of that appointment. 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The contents of this document are not to be construed as providing legal, business or tax advice or opinion. www.scottwilson.com © Scott Wilson Group PLC 2008 Harborough District Council Strategic Flood Risk Assessment D119550 Table of Contents Abbreviations ...............................................................................................iii Executive Summary ..................................................................................... v 1 Introduction ....................................................................................... 1 1.1 Background .................................................................................................................... 1 1.2 The Harborough District SFRA ....................................................................................... 2 1.3 The SFRA Structure ....................................................................................................... 2 1.4 The SFRA Aims & Purpose ............................................................................................ 3 2 Study Area ........................................................................................ 5 2.1 Administrative Bodies ..................................................................................................... 6 2.2 Historical Flooding .......................................................................................................... 8 2.3 Flood Sources .............................................................................................................. 10 2.4 Flood Risk Management............................................................................................... 17 2.5 Potential Development Pressures................................................................................. 21 2.6 Climate Change and Future Flood Risk ........................................................................ 23 3 Policy Review.................................................................................. 27 3.1 Planning Policy ............................................................................................................. 28 3.2 European Policy ........................................................................................................... 28 3.3 National Planning Policy ............................................................................................... 30 3.4 Regional Planning Policy .............................................................................................. 34 3.5 Local Planning Policy.................................................................................................... 37 3.6 Waste & Minerals Planning Policies.............................................................................. 39 3.7 Emerging Local Development Framework .................................................................... 39 3.8 Non-Statutory National Planning Documents................................................................ 40 3.9 Catchment Flood Management Plans........................................................................... 41 3.10 Flood Risk .................................................................................................................... 47 3.11 Sustainable Drainage Systems..................................................................................... 48 3.12 Water Environment....................................................................................................... 49 4 SFRA – Methodology ...................................................................... 51 4.1 Objective ...................................................................................................................... 51 4.2 Tasks............................................................................................................................ 51 4.3 Stakeholders................................................................................................................. 51 4.4 Data / Information Collected ......................................................................................... 54 4.5 GIS, Flood Mapping and Application............................................................................. 55 Harborough Level 1 SFRA Final April 2009 i Harborough District Council Strategic Flood Risk Assessment D119550 4.6 SFRA – Flood Risk Review Summary........................................................................... 60 5 The Sequential Test ........................................................................ 61 5.1 The Sequential Approach ............................................................................................. 61 5.2 Using the SFRA to Apply the Sequential Test............................................................... 62 5.3 Recommended Stages for Application of the Sequential Test....................................... 69 5.4 Using the SFRA Maps, Data and GIS Layers ............................................................... 71 6 Site Specific Flood Risk Assessment Guidance .............................. 73 6.1 Introduction................................................................................................................... 73 6.2 Residual Risk Management.......................................................................................... 77 7 Summary and Recommendations ................................................... 82 7.1 Summary: Flood Risk Issues..................................................................................... 82 7.2 Summary: Flood Zone Data Issues ........................................................................... 83 7.3 Summary: Climate Change Issues ............................................................................ 83 7.4 Recommendations: Site Allocation Process ............................................................ 84 7.5 Recommendations: Council Policy and Practice ..................................................... 84 7.6 Recommendations: Emergency Planning................................................................. 85 7.7 Recommendations: General ...................................................................................... 85 7.8 Recommendations: Future Updates to the SFRA .................................................... 86 7.9 Recommendations: Level 2 SFRA............................................................................. 86 References................................................................................................. 87 National Policy & Guidance Documents ..................................................................................... 87 Regional & Local Policy & Guidance Documents........................................................................ 88 Appendix A: SUDS Review and Historical Flooding .....................................A Appendix B: Data Register...........................................................................B Appendix C: List of Contacts....................................................................... C Appendix D: Flood Zone Mapping............................................................... D Appendix E: Groundwater Vulnerability and Geology...................................E Appendix F: SFRA Maintenance and Updates .............................................F Harborough Level 1 SFRA Final April 2009 ii Harborough District Council Strategic Flood Risk Assessment D119550 Abbreviations AA Appropriate Assessment AAP Area Action Plan ABI Association of British Insurers AEP Annual Estimated Probability AMR Annual Monitoring Report ASCCUE Adaptation Strategies for Climate Change in the Urban Environment AW Anglian Water BHS British Hydrological Society BW British Waterways