South Hams District Council SFRA Level 1 Addendum
Total Page:16
File Type:pdf, Size:1020Kb
South Hams District Council SFRA Level 1 Addendum Final Report May 2016 South Hams District Council Follaton House Plymouth Road Totnes Devon TQ9 5NE JBA Project Manager Daryl Taylor JBA Consulting Bradley House, Park Five, Harrier Way Exeter EX2 7HU Revision History Revision Ref / Date Issued Amendments Issued to Phil Baker , Ross Johnson Draft v1.0/January 2016 - (SHDC) Update for new climate Phil Baker, Ross Johnson Final v2.0/March 2016 change guidance and (SHDC) other minor amendments Phil Baker, Ross Johnson Final v3.0/May 2015 Minor amendments. (SHDC) Contract This report describes work commissioned by South Hams District Council in their email dated 4th August 2015. Rachel Hopgood and Daryl Taylor of JBA Consulting carried out this work. Prepared by .................................................. Rachel Hopgood MEng Engineer Reviewed by ................................................. Daryl Taylor BEng MSc Project Manager Purpose This document has been prepared as a Final Report for South Hams District Council JBA Consulting accepts no responsibility or liability for any use that is made of this document other than by the Client for the purposes for which it was originally commissioned and prepared. JBA Consulting has no liability regarding the use of this report except to their Client. 2015s3137 SHDC Level 1 SFRA Addendum i Acknowledgements We would like to thank South Hams District Council, the Environment Agency and South West Water for the provision of data for this study. Copyright © Jeremy Benn Associates Limited 2016 Carbon Footprint A printed copy of the main text in this document will result in a carbon footprint of 454g if 100% post-consumer recycled paper is used and 577g if primary-source paper is used. These figures assume the report is printed in black and white on A4 paper and in duplex. JBA is aiming to reduce its per capita carbon emissions. 2015s3137 SHDC Level 1 SFRA Addendum ii This page is intentionally left blank. 2015s3137 SHDC Level 1 SFRA Addendum iii 1 Introduction .......................................................................................................... 1 1.1 Background ............................................................................................................ 1 1.2 Strategic Flood Risk Assessment (SFRA) Approach ............................................ 1 1.3 Planning Context ................................................................................................... 3 1.4 Study Area ............................................................................................................. 3 1.5 South Hams District Council Area ......................................................................... 3 1.6 Dartmoor National Park Area ................................................................................ 3 1.7 Aims and Objectives of the SFRA Update ............................................................. 4 2 Policy Context ...................................................................................................... 5 2.1 The Flood Risk Regulations (2009) ....................................................................... 5 2.2 River Basin Management Plans (2009) ................................................................. 5 2.3 The Flood and Water Management Act (2010) ..................................................... 6 2.4 National Flood and Coastal Erosion Risk Management Strategy (2011) .............. 6 2.5 Shoreline Management Plan (2011) ...................................................................... 6 2.6 Devon County Council Preliminary Flood Risk Assessment (2011) ..................... 7 2.7 National Planning Policy Framework (2012) ......................................................... 7 2.8 Catchment Flood Management Plans (CFMPs) (2012) ........................................ 7 2.9 Surface Water Management Plans (2012 – 2013) ................................................ 9 2.10 Local Flood Risk Management Strategy (2014) .................................................... 9 2.11 Consultation on delivering Sustainable Drainage Systems (2014) ....................... 9 2.12 House of Commons: Written Statement HCWS161 (2014) .................................. 9 2.13 Emergency Planning .............................................................................................. 10 3 Planning for Flood Risk ...................................................................................... 11 3.1 Site Specific Flood Risk Assessment Guidance .................................................... 11 3.2 Sustainable Drainage Systems (SuDS) ................................................................. 17 4 Data Collection and Review ................................................................................ 27 4.1 Tasks ..................................................................................................................... 27 4.2 Stakeholder Consultation....................................................................................... 27 4.3 Data Availability ..................................................................................................... 27 4.4 Recommendations for Further Data Collection ..................................................... 28 4.5 Data Summary ....................................................................................................... 28 5 South Hams Strategic Flood Risk Summary .................................................... 33 5.1 Fluvial Flood Risk .................................................................................................. 33 5.2 Tidal Flood Risk ..................................................................................................... 34 5.3 Surface Water Flood Risk ...................................................................................... 34 5.4 Sewer Flooding ...................................................................................................... 34 5.5 Highway Flooding .................................................................................................. 34 5.6 Groundwater Flood Risk ........................................................................................ 34 5.7 Critical Drainage Areas .......................................................................................... 35 5.8 Historical Flooding ................................................................................................. 36 5.9 Potential Impacts of Climate Change .................................................................... 40 5.10 Main Settlements - South Hams District Council Planning Area ........................... 41 5.11 Minor Settlements – South Hams District Council Planning Area ......................... 41 5.12 Sherford New Town Development ......................................................................... 42 5.13 Minor Settlements – Dartmoor National Park Authority Planning Area ................. 42 6 Settlement Specific Flood Risks ........................................................................ 43 6.1 Chillington .............................................................................................................. 43 6.2 Dartmouth .............................................................................................................. 45 6.3 Ivybridge ................................................................................................................ 47 6.4 Kingsbridge ............................................................................................................ 49 6.5 Modbury ................................................................................................................. 51 6.6 Salcombe (including South and North Sands) ...................................................... 53 2015s3137 SHDC Level 1 SFRA Addendum iv 6.7 Stokenham ............................................................................................................. 55 6.8 Totnes .................................................................................................................... 56 6.9 Woolwell................................................................................................................. 58 6.10 Yealmpton .............................................................................................................. 59 6.11 Ashprington ............................................................................................................ 61 6.12 Avonwick ................................................................................................................ 62 6.13 Beeson and Beesands........................................................................................... 64 6.14 Blackawton ............................................................................................................ 65 6.15 Brixton .................................................................................................................... 66 6.16 Churchstow ............................................................................................................ 67 6.17 Cornwood .............................................................................................................. 68 6.18 Cornworthy ............................................................................................................ 69 6.19 Dartington .............................................................................................................