Nottinghamshire and Nottingham Level 1 Strategic Flood Risk Assessment Minerals and Waste Final Living Document April 2011 Prepared for www.urs-scottwilson.com Nottinghamshire County Council & Nottingham City Council Level 1 Minerals & Waste SFRA Revision Schedule Level 1 Minerals and Waste Strategic Flood Risk Assessment April 2011 Rev Date Details Prepared by Reviewed by Approved by D1 March 2011 Draft Helen Burton Michael Timmins Chris Broome Assistant Flood Risk Principal Flood Risk Principal Engineer Specialist Specialist Victoria Raiment Andrew Woodliffe Graduate Water Scientist Principal Flood Risk Specialist D2 March 2011 Draft Helen Burton Michael Timmins Chris Broome Assistant Flood Risk Principal Flood Risk Principal Engineer Specialist Specialist F1 April 2011 Final Helen Burton Andrew Woodliffe Chris Broome Assistant Flood Risk Principal Flood Risk Principal Engineer Specialist Specialist URS/ Scott Wilson Royal Court Basil Close Chesterfield This document has been prepared in accordance with the scope of Scott Wilson's Derbyshire appointment with its client and is subject to the terms of that appointment. 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The contents of this document do not provide legal or tax advice or opinion. © Scott Wilson Ltd 2011 www. urs -scottwilson.com Nottinghamshire County Council & Nottingham City Council Level 1 Minerals & Waste SFRA Table of Contents Strategic Flood Risk Assessment Pro Forma .......................................... 8 Executive Summary ................................................................................ 9 1 Introduction ................................................................................ 12 1.1 Commission............................................................................................................12 1.2 Background ............................................................................................................12 1.3 SFRA Structure ......................................................................................................13 1.4 SFRA Aims and Objectives.....................................................................................15 2 Study Area ................................................................................. 16 2.1 General Overview...................................................................................................16 2.2 Geology..................................................................................................................18 2.3 Current Minerals Extraction Situation......................................................................18 2.4 Current Waste Management Situation ....................................................................20 2.5 Watercourses .........................................................................................................21 3 Policy Context ............................................................................ 22 3.1 Planning Policy Overview .......................................................................................22 3.2 European Policy .....................................................................................................24 3.3 National Policies .....................................................................................................25 3.4 Regional Policies ....................................................................................................34 3.5 Adopted Local Plans...............................................................................................41 3.6 Minerals and Waste Development Frameworks......................................................42 4 The PPS25 Sequential Test ....................................................... 44 4.1 The Sequential Approach .......................................................................................44 4.2 Using the SFRA to Apply the Sequential Test.........................................................45 4.3 Using the SFRA Maps, Data and GIS Layers .........................................................49 5 The Exception Test & Level 2 SFRAs ........................................ 53 5.1 When is the Exception Test Required?...................................................................53 5.2 The Exception Test Process ...................................................................................53 5.3 What is a Level 2 SFRA?........................................................................................54 5.4 When is a Level 2 SFRA Required? .......................................................................54 6 Level 1 SFRA Methodology........................................................ 56 6.1 Overview ................................................................................................................56 6.2 Tasks......................................................................................................................56 6.3 Stakeholder Consultation........................................................................................56 Final Level 1 SFRA April 2011 3 Nottinghamshire County Council & Nottingham City Council Level 1 Minerals & Waste SFRA 6.4 Data / Information Collected ...................................................................................59 6.5 Data Presentation – GIS Layers .............................................................................60 6.6 GIS Data Gaps and Assumptions ...........................................................................61 7 Review of Flood Risk in Nottinghamshire ................................... 78 7.1 Introduction.............................................................................................................78 7.2 Historical Flooding ..................................................................................................78 7.3 Fluvial and Tidal Flooding.......................................................................................79 7.4 Flooding from Land (Pluvial/Surface Water Flooding and Overland Flow) ..............85 7.5 Groundwater Flooding ............................................................................................85 7.6 Sewers Flooding.....................................................................................................85 7.7 Flooding from Canals, Reservoirs and other Artificial Sources................................86 7.8 Existing Flood Risk Management in Nottinghamshire .............................................89 7.9 Flood Warning Areas..............................................................................................90 7.10 Emergency Planning and Flood Risk ......................................................................91 7.11 Potential Future Minerals Sites and Flood Risk.......................................................92 7.12 Waste Management and Flood Risk .......................................................................93 7.13 Climate Change and Future Flood Risk ..................................................................94 8 Future Flood Risk Management Options .................................... 95 8.2 Sustainable Flood Risk Management......................................................................95 8.3 Sequential Working and Restoration of Minerals Sites............................................97 8.4 Sustainable Drainage Systems (SuDS) ..................................................................99 9 Site Specific FRA Guidance ..................................................... 101 9.1 Introduction...........................................................................................................101 9.2 When is a FRA Necessary?..................................................................................102 9.3 What are the Requirements of a FRA? .................................................................102 9.4 FRA Staged Approach..........................................................................................103 9.5 Flood Zone 1 ........................................................................................................104 9.6 Flood Zone 2 ........................................................................................................104 9.7 Flood Zone 3a ......................................................................................................104 9.8 Flood Zone 3b ......................................................................................................105 9.9 Management of Surface Water Runoff..................................................................106 9.10 Residual Risk........................................................................................................106 Appendix A: County Overview Maps Appendix B: Detailed Mapping - Fluvial Appendix C: Detailed Mapping – Pluvial Final Level 1 SFRA April 2011 4 Nottinghamshire County Council & Nottingham City Council