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Wokingham Borough Council Local Flood Risk Management Strategy Final Draft

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Wokingham Borough Council Local Flood Risk Management Strategy Final Draft WOKINGHAM BOROUGH COUNCIL LOCAL FLOOD RISK MANAGEMENT STRATEGY FINAL DRAFT February 2015 Confidentiality: Quality Management Issue/revision Issue 1 Revision 1 Revision 2 Revision 3 Revision 4 Revision 5 Revision 6 Remarks DRAFT DRAFT DRAFT DRAFT PUBLIC CON- DRAFT FOL- DRAFT SULTATION LOWING PUB- FOLLOWING DRAFT LIC CONSUL- ADDITIONAL TATION PUBLIC COMMENTS Date 19/11/2013 4/12/13 17/12/13 May 2014 June 2014 November 2014 February 2015 Prepared by Caroline Caroline Caroline Caroline Caroline Forbes Caroline Forbes Caroline Forbes Forbes Forbes Forbes Forbes Signature Checked by Stephen Riley Stephen Stephen Stephen Stephen Riley Stephen Riley Stephen Riley Riley Riley Riley Signature Authorised by Stephen Riley Stephen Stephen Stephen Stephen Riley Stephen Riley Stephen Riley Riley Riley Riley Signature Project number 10396829 10396829 10396829 10396829 10396829 10396829 10396829 Report number v1 v2 v3 v4 v5 v6 v7 File reference Project number: 10396829 Dated: February 2015 2 WOKINGHAM BOROUGH COUNCIL LOCAL FLOOD RISK MANAGEMENT STRATEGY FINAL DRAFT February 2015 Client Wokingham Borough Council Shute End Wokingham Berkshire RG40 1BN Consultant WSP UK Limited Mountbatten House, Basing View, Basingstoke, RG21 4HJ UK Tel: +44 12 5631 8800 Fax: +44 12 5631 8700 www.wspgroup.co.uk Registered Address WSP UK Limited 01383511 WSP House, 70 Chancery Lane, London, WC2A 1AF WSP Contacts Stephen Riley Caroline Forbes 3 Table of Contents 1 Executive Summary 1.1 Our Objectives .......................................................................................................................... 6 1.2 Our Measures ........................................................................................................................... 7 1.3 Our Programme for Implementation .......................................................................................... 7 1.4 Implementation of Flood Risk Management Measures .............................................................. 8 PART A: GENERAL INFORMATION ................................................................................................ 10 2 INTRODUCTION ........................................................................................................................ 10 2.1 Purpose of the Strategy........................................................................................................... 10 2.2 Overview of Wokingham ......................................................................................................... 10 2.3 Who the Strategy is relevant to ............................................................................................... 11 2.4 The period covered by the Strategy ........................................................................................ 11 2.5 What is flooding?..................................................................................................................... 11 2.6 What is flood risk? ................................................................................................................... 12 2.7 The Objectives of the Strategy ................................................................................................ 12 2.8 Action to Reduce and Manage Flood Risk............................................................................... 13 2.9 Scrutiny ................................................................................................................................... 13 3 LEGISLATIVE AND POLICY CONTEXT .................................................................................... 15 3.1.1 The Pitt Review ................................................................................................................ 15 3.1.2 The Flood and Water Management Act (FWMA) 2010 ..................................................... 15 3.1.3 The National Flood and Coastal Erosion Risk Management Strategy (NFCERMS) 2011.. 15 4 ROLES AND RESPONSIBILITIES ............................................................................................. 17 4.1 Purpose of defining roles and responsibilities in Wokingham .................................................. 17 4.2 Key agencies involved in the management of Flood Risk in Wokingham ................................ 17 4.2.1 Risk Management Authorities in Wokingham .................................................................... 17 4.3 Other Groups and Stakeholders .............................................................................................. 23 4.3.1 Wokingham Borough Council as Planning Authority ......................................................... 23 4.3.2 Riparian Owners ............................................................................................................... 23 4.3.3 Residents and Businesses ................................................................................................ 23 4.3.4 Town and Parish Councils ................................................................................................ 24 4.3.5 Highways Agency ............................................................................................................. 24 4.3.6 The Thames Regional Flood and Coastal Committee (RFCC) .......................................... 24 4.3.7 Thames Valley Local Resilience Forum ............................................................................ 25 4.3.8 Residents Associations ..................................................................................................... 25 4.3.9 Developers ....................................................................................................................... 25 4.4 Risk Management Authority Cooperation ................................................................................ 25 4.4.1 Berkshire Five Strategic and Technical Group .................................................................. 25 PART B: SPECIFIC INFORMATION ................................................................................................. 27 5 UNDERSTANDING THE FLOOD RISK IN WOKINGHAM .......................................................... 27 5.1 Overview of flood risk in Wokingham....................................................................................... 27 5.2 Historic flooding ...................................................................................................................... 30 5.2.1 Surface Water Flooding .................................................................................................... 30 Figure 5. Updated Flood Map for Surface Water for Wokingham Borough..................................... 32 5.2.2 Groundwater Flooding ...................................................................................................... 33 5.2.3 Main River and Ordinary Watercourse Flooding ............................................................... 35 5.2.4 Sewer Flooding ................................................................................................................. 37 5.2.5 Highway Flooding ............................................................................................................. 37 5.2.6 Reservoir Flooding ............................................................................................................ 37 5.2.7 Combined flooding ............................................................................................................ 38 5.3 Changes to current and future Flood Risk ............................................................................... 38 5.3.1 Assessment of Flood Risk ................................................................................................ 38 Project number: 10396829 Dated: February 2015 4 5.3.2 Factors Influencing Flood Risk .......................................................................................... 39 5.4 Existing schemes and works already undertaken .................................................................... 41 6 MANAGING THE LIKELIHOOD AND IMPACT OF FLOODING IN WOKINGHAM BOROUGH .. 42 6.1 Objective 1: Improve knowledge and understanding of current and future local sources of flood risk within Wokingham ...................................................................................................................... 42 6.2 Objective 2: Work collaboratively and develop effective partnerships with other Flood Risk Management Authorities and local communities to deliver a sustainable, cost effective approach to flood risk management, that reduces flood risk and provides wider environmental and socio- economic benefits where possible .................................................................................................... 42 6.3 Objective 3: Ensure that planning and decisions take full account of flood risk, avoiding development in inappropriate locations, minimising and preventing an increase in flood risk wherever possible ............................................................................................................................................ 43 6.4 Objective 4: Maintain and, where necessary, improve local flood risk management infrastructure and privately owned flood defence assets and Ordinary watercourses, to reduce risk. 44 6.5 Objective 5: Ensure that emergency plans and responses to flood incidents are effective and that communities are prepared and resilient to local flood risk .......................................................... 45 6.6 Objective 6: Identify national,
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