Making Space for WaterRisk Mapping: Coastal Erosion

Tuesday 6th June 2007

LGA SIG

Geoff Astle, Environment Agency

Jonathan Rogers, Halcrow

Making Space for Water

Background to

Making Space for Water (MSfW)

And

the Coastal Erosion Project (HA4b)

Geoff Astle

Senior Project Manager

Environment Agency

Making Space for WaterInitial Consultation Serious flood events in 1998 & 2000 highlighted need to

develop comprehensive & integrated strategy for managing future flood and coastal erosion risks.

On 29/7/04 Government launched the “Making Space for Water” (MSfW) consultation

Initial consultation lasted until 1/11/2004 Consultation was to inform development of a new

strategy Sought views on broad range of flood and coastal

erosion risk management issues

Making Space for WaterResponse In March 2005 Defra published the first Government

response to the consultation It outlined how the new strategy was to be implemented

over the next 20 years and beyond It recognised the fact that there was further work required

to implement the detail of the new strategy. Acknowledged the need for continued consultation in

order to assess options for the future. Result was a programme of work consisting of 25

projects divided into 4 themes

Making Space for WaterProject Themes

Holistic Approach to Managing Flood and Coastal Erosion Risk (HA)

Achieving Sustainable Development (SD) Increasing Resilience to Flooding (RF) Funding (FD)

Making Space for Water“Holistic Approach” Theme HA1 – Environment Agency Strategic Overview HA2 – Urban Flood Risk and Integrated Drainage HA3 – Urban Flood Risk and the Transport Network HA4 – Risk Mapping HA5 – Groundwater Flooding HA6 – Catchment Scale Land-Use Management HA7 – Good Practice Land Management

Making Space for WaterHA4 – Risk Mapping

HA4a – Flooding from Other Sources HA4b – Coastal Erosion

Coastal Erosion (HA4b) Project Objectives

Map the coastline susceptible to erosion and instability from natural processes

Predict future coastline positions based on existing defences and management practices

• Consider ways in which both hazard and risk associated with coastal erosion can be generated for England

• Look at ways in which this can be graphically illustrated through mapping

• Develop policy, regulation, organisation responsibility and processes to support implementation of the above

• Contribute to a wider MSfW communications strategy

Risk Mapping: Coastal Erosion (HA4b) Project Scope

England and Wales The assessment should cover the whole of the

coastline (defended and undefended) Not estuaries (as defined by SMP boundaries) Erosion only

Not flooding (complement flood maps) Nor flooding as a consequence of erosion

Making Space for WaterFD2324/RACE

FD2324/RACE

R&D Project Commissioned by Defra in 2005 “provide a procedure to

enable coastal authorities with the means to better understand, appraise and quantify the coastal erosion risks they are obligated to manage.”

Develop broad methodology & proof of concept tool

Carry out trials Project complete & tools available

Making Space for WaterSetting up HA4b

FD2324

HA4b

A national application of FD2324

Making Space for Water HA4b: Project Approach Halcrow lead consultants Peer review as part of quality process included:

Royal Haskoning, Faber Maunsell, Terry Oakes Associates

Making Space for Water HA4b: Project Approach Internal consultation included:

EA England & Wales Wider MSfW Programme including:

Coastal Strategic Overview (HA1) Adaptation Toolkit (SD2) Climate Change (SD5) Stakeholder and Community Engagement

(SD6)

Making Space for Water HA4b: Project Approach External Consultation included:

Defra and WAG Defra Stakeholders’ Forum Coastal Group Chairs Institution of Civil Engineers (ICE) Associated of British Insurers (ABI) Coastal Group Roadshows

17 events already attended A further 4 to follow (including 1 in Wales)

FAQ sheet maintained

Making Space for WaterHA4b Project Timelines

Project Inception

Create Database

First National Pass

Local Validation

Test tools & processes

Initial Hazard Maps

Risk Maps

Create Software Tools (x3)

March 2007

June 2007

December 2007

December 2008

June 2006

Create baseline position

“Beta” Testing

Making Space for Water

Current Project Position:• Finalising ‘baseline’ position (Defence data)• First National Run• Continue to consult with Local Authorities

through Coastal Groups (England and Wales)

Making Space for Water

Risk Mapping: Coastal Erosion

Project Details

Jonathan Rogers

Halcrow