MULTI-AGENCY FLOOD RESPONSE PLAN V2.1 (Public) December 2016
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MULTI-AGENCY FLOOD RESPONSE PLAN V2.1 (Public) December 2016 Authored by: Croydon Resilience Team Resources Department Room 2.12, Town Hall, Katharine Street Croydon, CR0 1NX 020 8604 7295 (internal xtn: 47295) | [email protected] Ownership and Version Control Document Information Version 1.0 2.0 2.1 Issue date May 2012 Dec 2016 Sep 2017 Current version Croydon Resilience Forum 25 November 2016 approved by September 2018, or as required Local Authority Part 1: LLAG Operations; depending on Minimum Next review date Supports part 2: Plans & outcomes of flooding Standards Capabilities – MSL Ref #2.15 incidents and Reference exercises. Croydon Resilience Forum Multi-Agency Flood Response Plan [Public Title Version] The procedures included in this Multi-Agency Flood Response Plan will be used in the event of a flood emergency within the London Borough of Croydon. The Multi-Agency Flood Response Plan is prepared, maintained and Description / Purpose updated by the Resilience Team, Croydon Council. All Category 1 and 2 responders under the Civil Contingencies Act 2004 that cover the Borough of Croydon should acknowledge this plan and work under it. This plan has been compiled in consultation with all members of the Croydon Resilience Forum. Author(s) Hari Waterfield Target audience Croydon Resilience Forum & Partners Distribution list Croydon Resilience Forum Superseded London Borough of Croydon Multi-Agency Flood Plan (May 2012) documents Responsible Officer Kelly Jack Contact details 020 8726 6000 Responsible Director Steve Iles Contact details 020 8726 6000 Acknowledgements Croydon Council; London Borough of Havering Document Revision Record Version Description of amendment Reason for change Author Date 1.0 Anna Bastow May 2012 Lessons from 2014 2.0 Full Revision Hari Waterfield Dec 2016 flooding Update of web links & small 2.1 Version for internet Kelly Jack Sep 2017 updates Croydon MAFRP Version 2.1 Page 2 of 59 Record of Exercises, Testing or Activations Proposed Exercise / What will be tested/ Type Validation Training Covered Multi-agency validation exercise (20/07/2010) Exercise Watermark (4-11/03/2011) Croydon flooding S19 report; lessons Full plan activation N/A (February/March 2014) learned document Multi-agency Exercise Barrage Table top BRF exercise coordination to flooding Post exercise report (25/11/2016) incident Critical Information This plan has been developed to collate information regarding the roles and responsibilities of organisations that respond to flooding Introduction within the Croydon area to improve multi agency response and co- ordination to flooding incidents. It aims to use existing plans and systems where possible and these have been duly signposted. Go to page 34 for Activation Procedure and Initial Partner Response to Activation Go to page 29 for Triggers and Actions in response to a How to use this plan quickly Flood Warning or Severe Flood Warning Go to page 41 to see Specific Considerations for a Flood Event Go to page 44 for guidance on Evacuation Every emergency is different, and it is important to be flexible to ensure the most appropriate and effective response. Respect for the individual and their needs, and for the diversity of communities is key to ensuring the best possible care for affected people. Principles The response to any emergency is conducted in partnership. A multi-agency approach is crucial and sharing of information between partners is essential. The arrangements in this plan are complementary to the major incident procedures for London set out in the LESLP Major Incident Procedures Manual, the London Strategic Coordination Protocol, and the London Strategic Flood Response Framework. Croydon MAFRP Version 2.1 Page 3 of 59 Table of Contents Ownership and Version Control .................................................................................................................. 2 Critical Information ...................................................................................................................................... 3 Table of Contents ........................................................................................................................................ 4 1 Introduction ......................................................................................................................................... 6 1.1 Aim and Objectives ..................................................................................................................... 6 1.2 Related and Interdependent Plans ............................................................................................. 7 1.3 Croydon Caterham Bourne Flooding 2014 and Lessons Learned ............................................ 8 2 Overview of Flood Risk in Croydon .................................................................................................... 9 2.1 Introduction ................................................................................................................................. 9 2.2 Topography ................................................................................................................................. 9 2.3 Fluvial Flooding ......................................................................................................................... 10 2.4 Surface Water Flooding ............................................................................................................ 10 2.4.1 Surface Water Management Plan (SWMP) ......................................................................... 10 2.5 Ground Water Flooding ............................................................................................................ 10 2.6 Reservoir Inundation ................................................................................................................. 11 2.7 Ordinary Watercourse Flooding ................................................................................................ 11 2.8 Sewer Flooding ......................................................................................................................... 11 2.9 South West London Flood Group ............................................................................................. 12 3 Fluvial Flood Risk Zone Assessments ............................................................................................. 13 3.1 Wandle Flood Warning Zone .................................................................................................... 13 3.2 Norbury Brook Flood Warning Zone ......................................................................................... 15 3.3 Chaffinch Brook Flood Warning Zone ...................................................................................... 17 4 Groundwater ..................................................................................................................................... 19 4.1 Caterham Bourne Catchment ................................................................................................... 19 4.2 Groundwater Alert for South East London ............................................................................... 19 5 Surface Water ................................................................................................................................... 20 5.1 CDA Flood Risk Summary – CDA_040 Purley Cross .............................................................. 21 5.2 CDA Flood Risk Summary – CDA_041 Brighton Road ........................................................... 22 5.3 CDA Flood Risk Summary – CDA_043 South and Central Croydon ...................................... 23 6 Reservoir Inundation ......................................................................................................................... 24 7 Plan Activation .................................................................................................................................. 25 7.1 Planning Assumptions .............................................................................................................. 25 7.2 Flood Warning Codes ............................................................................................................... 25 7.3 Flood Guidance Statements ..................................................................................................... 27 7.4 Media......................................................................................................................................... 29 7.5 Triggers and Actions ................................................................................................................. 29 7.6 Activation Procedure ................................................................................................................. 34 7.7 Initial Partner Response to Activation ...................................................................................... 34 8 Communications ............................................................................................................................... 35 8.1 General Public .......................................................................................................................... 35 8.1.1 Communicating through Faith, Ethnic, and Community Groups ......................................... 35 8.2 Lead Local Flood Authority (LLFA) Internal Communications ................................................. 35 8.3 Members ..................................................................................................................................