RRootthheerrhhaamm LLooccaall FFlloooodd RRiisskk MMaannaaggeemmeenntt SSttrraatteeggyy MMaayy 22001144 Produced by: Drainage Team, Streetpride, Environment & Development Services File: 17/187/46 Issued: May 2014 Edition: 1 Revision: 0 CONTENTS 1 INTRODUCTION 1 1.1 Overview 1 1.2 Sources of Flooding 1 1.3 Introduction to the Area 2 2.0 LEGISLATIVE CONTEXT 3 3.0 LINKS TO OTHER STRATEGIES 4 3.1 National Plans 6 3.2 Regional Plans 6 3.3 Rotherham Local Plans – (Flood related) 8 3.4 Rotherham Local Plans – (non flood related) 9 4.0 ASSESSMENT OF LOCAL FLOOD RISK 11 4.1 Past flood events 11 4.2 Environment Agency Surface Water Flood Risk Modelling 11 5.0 GOVERNANCE AND PARTNERSHIP ARRANGEMENTS 12 6.0 FLOOD RISK MANAGEMENT AUTHORITIES 14 6.1 Definition 14 6.2 Lead Local Flood Authority – Rotherham MBC 14 6.3 The Environment Agency 17 6.4 Water Companies – Yorkshire Water Services Ltd and Severn Trent Water Ltd 18 6.5 Internal Drainage Boards (IDBs) 18 6.6 Highway Authority - Rotherham MBC & Highways Agency 18 6.7 Other Powers and Duties of Rotherham MBC 19 6.8 As a Category 1 Responder (Emergency Planning) 19 6.9 As Planning Authority 19 6.10 As Sustainable Drainage Systems Approving Body (SAB) 20 6.11 As a Riparian Owner 20 6.12 Other Partners 21 7.0 OBJECTIVES OF THE STRATEGY 22 8.0 ACTION PLAN 23 9.0 FLOOD RISK MANAGEMENT FUNDING 23 10.0 THE POTENTIAL IMPACTS OF CLIMATE CHANGE 24 10.1 Effects of Climate Change 24 10.2 The Evidence 24 10.3 Key Projections for Humber River Basin District 25 10.4 Implications for Flood Risk 25 10.5 Adapting to Change 25 May 2014 Edition: 1 File: 17/187/46 Revision: 0 10.6 Long Term Developments 26 11.0 ENVIRONMENTAL OBJECTIVES AND STRATEGIC ENVIRONMENTAL ASSESSMENT 26 12.0 COMMUNICATIONS AND ENGAGEMENT 27 13.0 CIVIL CONTINGENCIES AND COMMUNITY RESILIENCE 27 14.0 THE ROLE OF THE PLANNING AUTHORITY 28 15.0 SUDS APPROVING BODY (SAB) 28 16.0 ADDRESSING THE SKILLS GAP 28 17.0 DATA MANAGEMENT 28 18.0 THE ROLE OF SCRUTINY AND OVERVIEW COMMITTEES 29 19.0 REVIEWING AND REVISING THE STRATEGY 30 APPENDICES Appendix A - Action Plan Appendix B - Drawings Appendix C - Policies May 2014 Edition: 1 File: 17/187/46 Revision: 0 GLOSSARY AND ACRONYMS Assets Structures, or a system of structures, used to manage flood risk. Areas Susceptible to A method of surface water flood modelling Surface Water Flooding carried out by the Environment Agency to (AStSWF) indicate the broad areas likely to be at risk of surface water flooding. Now superseded by Risk of Flooding from Surface Water Map. See also FMfSW & RFfSW. Catchment An area that serves a watercourse with rainwater. Every part of land where the rainfall drains to a single watercourse is in the same catchment. Catchment Flood A strategic planning tool through which the Management Plan (CFMP) Environment Agency works with other key decision-makers on the large scale of a River Basin District to identify and agree overarching policies for sustainable flood risk management. Critical Infrastructure Infrastructure which is considered vital or indispensable to society, the economy, public health or the environment, and where the failure or destruction would have large impact. This would include emergency services such as hospitals, schools, communications, electricity sub-stations, water and waste water treatment works, transport infrastructure and reservoirs. Defence A structure that is used to reduce the probability of floodwater affecting a particular area, for example a raised embankment. Defra Department for Environment, Food and Rural Affairs. The government department with overall responsibility for flood risk management. FRM Flood Risk Management. FCERM Flood and Coastal Erosion Risk Management. Flood The temporary covering by water of land not normally covered with water. Flood Map for Surface Water A method of surface water flood modelling (FMfSW) carried out by the Environment Agency to indicate the broad areas likely to be at risk of surface water flooding, now superseded by Risk of Flooding From Surface Water Map. See also AStSWF & RFfSW. Flood Risk Area An area determined as having a significant risk of flooding in accordance with guidance published by Defra. Flood and Water The Flood and Water Management Act clarifies Management Act 2010 (FWM the legislative framework for managing surface Act) water flood risk in England. May 2014 Edition: 1 File: 17/187/46 Revision: 0 Fluvial flooding Flooding of main rivers. Floods Directive The EU Floods Directive came into force in November 2007 and is designed to help Member States prevent and limit the impact of floods on people, property and the environment. It was transposed into English law in December 2009 by the Flood Risk Regulations. Groundwater Water which is below the surface of the ground and in direct contact with the ground or subsoil. Hazard A potential source of harm. Hydrology The study of the effects of water on and below the earth’s surface. Internal Drainage Board Drainage Board who are legally responsible to (Danvm IDB in Rotherham) ensure that flows are maintained in ordinary watercourses within their domain. Local Development Local Planning Authority documents which Framework (LDF) comprises of community involvement, local development scheme and the annual monitoring report. Lead Local Flood Authority Local Authority with Flood Risk Management (LLFA) Functions as defined in the Flood and Water Management Act. Local flood risk Flood risk from sources other than main rivers, the sea and reservoirs, principally meaning surface runoff, groundwater and ordinary watercourses. Main River A watercourse shown as such on the Main River Map and for which the Environment Agency has flood risk management responsibilities and powers. Ordinary watercourses A river, stream, ditch, cut, sluice, dike or non- public sewer that is not a designated Main River and for which the Lead Local Flood Authority has flood risk management responsibilities and powers. Pluvial flooding Pluvial flooding (or surface runoff flooding) is caused by rainfall and is that flooding which occurs due to water ponding on, or flowing over, the surface before it reaches a drain or watercourse. Preliminary Flood Risk Assessment of surface water flood risk in the Assessment (PFRA) area covered by a Lead Local Flood Authority (Rotherham PFRA submitted describing both the probability and harmful to Defra December 2011) consequences of past and predicted future flooding. Flood Risk Regulations UK legislation implementing the European Floods Directive 2009. May 2014 Edition: 1 File: 17/187/46 Revision: 0 Resilience The ability of the community, services, area or infrastructure to withstand the consequences of an incident. Riparian owner A riparian owner is someone who owns land or property adjacent to a watercourse. A riparian owner has a duty to maintain the watercourse and allow flow to pass through their land freely. Risk Measures the significance of a potential event in terms of likelihood and impact. Risk is the likelihood that a person may be harmed or suffers adverse health effects if exposed to a hazard. Risk assessment A structured and auditable process of identifying potentially significant events, assessing their likelihood and impacts, and then combining these to provide an overall assessment of risk, as a basis for further decisions and action. Risk of Flooding From A map showing results of surface water flood Surface Water Map (RFfSW) modelling carried out by the Environment Agency to indicate the broad areas likely to be at risk of surface water flooding. See also FMfSW & AStSWF. River basin district There are 11 river basin districts in England and Wales, each comprising a number of contiguous river basins or catchments. Strategic Flood Risk Documents prepared by local planning Assessment (SFRA) authorities assessing broad areas of flood risk to inform planning decisions. Surface runoff Rainwater (including snow and other precipitation) which is on the surface of the ground (whether or not it is moving), and has not entered a watercourse, drainage system or public sewer. Surface Water Flooding In this context, surface water flooding describes flooding from sewers, drains, groundwater, and runoff from land, small water courses and ditches that occurs as a result of heavy rainfall. Surface Water Management A plan which outlines the preferred surface Plan (SWMP) water management strategy in a given location. Sustainable Drainage A sequence of management practices and Systems (SuDS) control measures designed to mimic natural drainage processes by allowing rainfall to infiltrate and by attenuating and conveying surface water runoff slowly compared to conventional drainage. May 2014 Edition: 1 File: 17/187/46 Revision: 0 Water Framework Directive A European Community Directive (2000/60/EC) (WFD) of the European Parliament and Council designed to integrate the way water bodies are managed across Europe. It requires all inland and coastal waters to reach “good status” by 2015 through a catchment-based system of River Basin Management Plans. May 2014 Edition: 1 File: 17/187/46 Revision: 0 1 INTRODUCTION 1.1 Overview In June 2008, Sir Michael Pitt published his final report, Learning Lessons from the 2007 Floods, which called for urgent and fundamental changes in the way the country is adapting to the increased risk of flooding, the need to provide consistent and co-ordinated management of flood risk, communication with communities, identification of those responsible in the local management of flood events, and adaptation to climate change. The report states that local authorities should play a major role in the management of local flood risk, taking the lead in tackling problems of local flooding and co-ordinating all relevant agencies. The Flood Risk Regulations 2009 and Flood and Water Management Act 2010 are an important part of the Government’s response to the Pitt Report.