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2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management John Buttivant, Environment Agency

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Page 1: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency
Page 2: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency

Their role in shoreline Management

John Buttivant

Coastal Engineer

September 2012

Coastal Groups

Page 3: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency
Page 4: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency

Weston - super - Mare 1981

Page 5: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency

Burnham 1981Burnham 1981

Page 6: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency
Page 7: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency
Page 8: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency

Dunster Beach nr Minehead

Page 9: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency
Page 10: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency
Page 11: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency
Page 12: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency
Page 13: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency

Severn Estuary SPA

Page 14: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency

Coastal Groups

Informal groups 1980s

Process based

Share best practice

SMP and Action Plan

Strategic Coastal Groups 2008

Overview of Action Plan delivery

EA and RFCC link

Long Term Investment Strategy/MTP

DEFRA ‘line of sight’

Monitoring

Research and Development

Page 15: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency

St Abbs Head to the Tyne Wansbeck DC

The Tyne to Flamborough Head Scarborough BC

Flamborough Head to Gibraltar Point East Riding of Yorkshire Council

Gibraltar Point to Hunstanton Environment Agency

Hunstanton to Kelling Hard Environment Agency

Kelling Hard to Lowestoft North Norfolk DC

Lowestoft to Felixstowe Suffolk Coastal DC

Felixstowe to Two Tree Island

Environment Agency

River Medway and Swale Estuary

Canterbury CC & Environm’t Agency

Isle of Grain to South Foreland Canterbury CC

10

9

8

7

6

5

4

3

1

2

South Foreland to Beachy Head Shepway DC

11

Beachy Head to Selsey Bill Arun DC

12

Selsey Bill to Hurst Spit New Forest DC

13 Isle of Wight Isle of Wight Council

14

Hurst Spit to Durlston Head Bournemouth BC

15

Rame Head to Hartland Point Caradon DC

17

Hartland Point to Anchor Head

North Devon DC 18

Anchor Head to Lavernock Point Monmouthshire Council

19

Lavernock Point to St Ann’s Head Camarthenshire Council

20

Durlston Head to Rame Head

Teignbridge DC 16

St Ann’s Head to Great Ormes Head

Pembrokeshire Council 21

Great Ormes Head to Scotland Blackpool BC

22

SMP Location

Lead Authority

SMP Ref. No.

- English

- Welsh

- Cross border

Figure prepared 17 February 2009

Shoreline Management Plans

• Defra High Level Target

• Coastal defence decisions

• Sustainable defences

• Natural environment

• Human environment

• Built environment

• Action Plans

Page 16: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency

Objectives

To set out risks to our coast and estuaries

To identify preferred policies to manage these

To discourage inappropriate development

To meet nature conservation legislation

Page 17: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency

Current Situation

Tidal Floodplain

without sea level rise

Page 18: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency

Erosion risk information

• Complement flood map

• Clear information to public

• Evidence for planning

• Best science

• Coastal engagement

Page 19: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency

Evidence – Coast Monitoring

Page 20: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency

National Network of Coastal Monitoring Programmes

(2011–16)

Page 21: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency
Page 22: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency

Longitude

La

titu

de

Simulation of 1979 Event using 1 minute resolution: Hs 7m Input Tp 18(s) Direction 240 (degrees)

-7 -6 -5 -4 -3 -2 -1 0 1 2

48.5

49

49.5

50

50.5

51

0

1

2

3

4

5

6

7

Page 23: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency
Page 24: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency
Page 25: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency

Policy options available

1. Hold the existing defence line

2. Advance the existing defence line

3. Managed realignment

4. No active intervention

• 0 – 20 years

• 20 – 50 years

• 50 – 100 years

Page 26: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency

Coastal Defence Planning

SMP

Identifies general policies and

implementation requirements

Coastal Defence Strategy

Identifies nature and type of

work to be undertaken

Scheme

Design, construction and

maintenance of defences

Page 27: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency

Next Steps

Action Plans

Strategy

Beach Management Plans

Page 28: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency
Page 29: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency

The need for coastal adaptationHistory of flooding

‘No Active Intervention’ or ‘Managed Realignment’

Defra assessing how communities can best adapt to increasing risks

‘Big Society’ encourages communal solutions

Page 30: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency

Somerset Pathfinder

• Led by Somerset County Council on behalf of partner organisations

Page 31: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency
Page 32: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency

Lessons Learnt

• Little experience of a severe flood event

• Scenarios are useful tools, but consider how they are portrayed

• Encouraging good attendance at drop-in sessions:

– Publicity

– Accessibility

– Format

– Provide answers to queries

Page 33: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency

Successes

• A dedicated Project Officer

• Practical, close-knit community

• A series of drop-in sessions

• Website

• E-game

• Non-technical outputs & stepped

development of Adaptation Action

Plan

• Porlock Weir Flood Action Group is

being formed

Page 34: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency

‘Big Society’ and Localism

Reduced sea defence funding can incentivise communities to seek a communal solution

Local knowledge is essential

Parish Council play an important role in mobilising community

Social Media

Page 35: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency
Page 36: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency

Strategic flood defence solution required to allow planned growth at Bridgwater, given extent of flood risk.

Preferred Solution is a Surge Barrier known as ‘The Parrett Barrier’ - estimated cost £24.6m

Need for policy approach to deal with PPS25 requirements for new development to be safe for its lifetime taking climate change into account

Draft Supplementary Planning Document (SPD) was completed in 3 months – EA/SDC. – delivers a ‘roof tax ‘ on all new development

Being used to secure estimated £3.2m contribution from a strategic mixed use scheme at North East Bridgwater.

The Planning Background

Page 37: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency

Contributions will be held by the Sedgemoor District Council;

A mechanism will be in place to ring fence funds for the Parrett Barrier;

SDC will produce an annual statement of total contributions secured;

SDC/EA will jointly commission a review of the scheme cost estimates at ‘key project milestones’, available alternative sources of funding, and the strength of the business case for delivery of the scheme;

Contributions will be index linked;

Key Principles of Tariff

Page 38: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency
Page 39: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency
Page 40: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency
Page 41: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency
Page 42: 2012 06 Bristol Channel Strategic Coastal Group – Shoreline and Flood Risk Management   John Buttivant, Environment Agency

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