The Dorset Coast Storms 2014 The Impacts, response, communication & building resilience

Transcription

1 GROUNDWATER LANDSLIDES & ROCKFALLS BEACH LOSSES AGRICULTURAL FLOODING BATHING WATERS INFRASTRUCTURE DAMAGE ROAD CLOSURES COASTAL DEFENCES DAMAGE PROPERTY FLOODING SEWER FLOODING The Dorset Coast Storms 2014 The Impacts, response, communication & building resilience Neil Watson Coastal Engineer Environment Agency Wessex Frontage with natural or hard defences Frontage with Beach Management Plan... 1

2 Flood Guidance Statement day by day 20/01/14 Week starting 02/12/13 27/01/14 Wessex at alert status 72 Consecutive days 16/12/13 03/02/14 23/12/13 Wettest Winter in 250 years 10/02/14 Clusters of storms bring extreme wind & waves 30/12/13 17/02/14 06/01/14 High Astronomic tides and Surge 24/02/14 13/01/14 03/03/14

3 Area Incident Room 3

4 Simulation of 1979 Event using 1 minute resolution: Hs 7m Input Tp 18(s) Direction 240 (degrees) Latitude Longitude Why does the South-West experience such large waves? 0

5 Porthleven, Cornwall 5 February 2014

6 Impact on infrastructure Dawlish, Devon

7 Roads & Infrastructure Portland Causeway closed for 8 hours February 5 th 2014 The Little Ship 5 th February Source BBC Preston Road Closed 6 occasions

8 Storm Return Periods 8

9 Waves & Energy January & February Wave Heights, West Bay (Green line Average, Black line Max) HS (Hm0) Hmax (m) /02/ /02/ /02/ /02/ /01/ /01/ /01/ /01/ /01/ /01/ /01/ /01/ /01/ /01/ /01/ /01/ /01/ /01/ /01/ /01/ /01/ /01/ /01/ /01/ /01/ /01/ /01/ /01/ /01/ /01/ /01/ /01/ /01/ /01/ /02/ /02/ /02/ /02/ /02/ /02/ /02/ /02/ /02/ /02/ /02/ /02/ /02/ /02/ /02/ /02/ /02/ /02/ /02/ /02/ /02/ /02/ /02/2014 Metre 9 Time

10 Chiswell Warnings and Severe Warnings issued Date Time Level of Warning 03/03/ :43 Flood Warning Update 03/03/ :00 Flood Warning 15/02/ :12 Flood Warning Update 14/02/ :18 Severe Flood Warning 12/02/ :59 Flood Warning 08/02/ :00 Severe Flood Warning 07/02/ :06 Flood Warning Update 06/02/ :38 Flood Warning 05/02/ :53 Flood Warning Update 05/02/ :34 Severe Flood Warning 04/02/ :12 Flood Warning 01/02/ :17 Flood Warning 07/01/ :08 Flood Warning 07/01/ :30 Severe Flood Warning 06/01/ :51 Severe Flood Warning 06/01/ :15 Flood Warning 04/01/ :06 Flood Warning 03/01/ :34 Severe Flood Warning 23/12/ :28 Flood Warning Update 22/12/ :40 Flood Warning 27/10/ :52 Flood Warning The Little Ship 5 th February Source BBC

11 The Impacts Welcome Acknowledgements: Data Reports Photos This image Richard Broome 11

12 Surge Damage 12

13 Storm Wave Damage STORM DAMAGE Undermining of promenade Avon Beach Christchurch Physical attrition West Bay Promenade Beach erosion Sandbanks Undermining of Sea The wall Little Ship 5 th February Source Waves BBC containing shingle Chesil Cove Cove Inn Chiswell

14 Landslides & Rockfalls Burton Bradstock Bournemouth Portland The Little Ship 5 th February Source BBC

15 The Little Ship 5 th February Source BBC

16 The Little Ship 5 th February Source BBC

17 Chesil Cove May 2013 Alan Holiday

18 Chesil Cove Feb 2014 Alan Holiday

19 Beach profile changed 15 February 2014 The Little Ship 5 th February Source BBC

20 Broad cost estimate to replace volume Lower estimate: 7,838,718 Upper estimate: 11,903,238 Damage to gabion beach reinforcement Ship 5 th February Source BBC 20

21 Typical Shingle losses & gains across the beach The Little Ship 5 th February Source BBC

22 Shingle removed from The Little front Ship face 5 th February of beach Source 14/15 BBC February

23 Damage to gabion beach reinforcement 15 February5 th February Source BBC

24 Damage repairs 14 May5 th February Source BBC

25 Preston Beach Road Swanage Beach 00:15 15 February

26 Swanage Beach 00:15 15 February Preston Beach Crest Reinforcement 26

27 The Little Ship 5 th February Source BBC

28 Swanage Beach 00:15 15 February

29 The Little Ship 5 th February Source BBC

30 The Little Ship 5 th February Source BBC

31 The Little Ship 5 th February Source BBC

32 The Little Ship 5 th February Source BBC

33 Operation Pitchpole How the military supported us and the community Repair of sea defences Chesil Beach, Portland Deployment of sandbags West Bay & Christchurch Asset inspections Merlin flight

34 The Response The Little Ship 5 th February Source BBC

35 Repair & recovery Funding Map showing Coast Protection Authority Allocations (As at 14 th May) The Little Ship 5 th February Source BBC Green = approved, Beige = Pending, Red = Rejected

36 Beach Depletion The Little Ship 5 th February Source BBC

37 Community Engagement Location Date Attendance Iford (Bournemouth) 3 March 80+ Preston (Weymouth) 26 February 120 Chiswell (Portland) 6 March 125 The Christchurch Little Ship 5 th February Source 20 BBC March 100+ West Bay 10 April 43

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39 What did we do? Worked with partners, before, during and after Oliver Letwin (Ministerial envoy), Richard Drax MP Held 60 media interviews Local Resilience Forum communications Army media machine Strong presence on social media Dorset Coast Forum helped engage with the communities 5 coastal drop in events Newsletters Public safety information Community film

40 Depths and velocity 40

41 Large objects and The masonry Little Ship 5 th washed February Source down BBC opes

42 The Social Media Storm

43 Where will we improve resilience? South Coast Risk Review Repair & Recovery funds Data interpretation to update plans & procedures Community engagement Coastal Change Adaptation

44 Six emerging themes nationally Sustaining Think Big and Act Early Facilitating an effective partnership response Improving effectiveness of our systems & approaches Improving our capability & resilience Facilitating community resilience Managing high public interest and sensitive issues

45 Neil Watson Coastal Engineer Wessex Area Thank you

46 VIDEO OF 5 TH FEBUARY STORM 46