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Mark Wiggins. What happened? Response. Results. Report. Recovery. Summary.

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Presentation on theme: "Mark Wiggins. What happened? Response. Results. Report. Recovery. Summary."— Presentation transcript:

1 Mark Wiggins

2 What happened? Response. Results. Report. Recovery. Summary.

3 Lyme Regis 05/02/2014 Photo: PCO

4 October 2013 to March 2014. Wettest winter for 250 years*. Up to 8 storms recorded at some PCO Wave Buoys. Largest storm waves recorded since deployment. * http://www.metoffice.gov.uk/news/releases/archive/2014/early-winter-stats

5

6 Perranporth Wave Buoy 09/02/2014 Photo: twitter.com/malpracticesurf

7 35 Post Storm Topographic Surveys.

8 Location of sites assessed in report.

9 Lyme Regis 05/02/2014 Photo: PCO

10 Seaton 08/01/2014 Photo: PCO

11

12 St Ives 17/01/2014 Photo: PCO

13 35 Post Storm Topographic Surveys. Profile analysis – calculate cross-sectional area.

14 South Milton 17/02/2014 Photo: PCO

15 South Milton, Devon Data : PCO

16 35 Post Storm Topographic Surveys. Profile analysis. Estimate beach frontage.

17 ~135m

18 35 Post Storm Topographic Surveys. Profile analysis. Estimate beach frontage. Calculate beach volume. Compare to pre-storm estimate.

19 Survey DateVolume (m 3 )Difference (m 3 ) 27/10/2007306328 18/10/2013301799-4529 05/03/2014288115-13684 Example: South Milton Sands - Devon

20 Site* 2013/14 Erosion (- ) or Accretion (+) (m 3 ) Long Term Erosion (-) or Accretion(+) (m 3 ) Long Term Monitoring Period Frontage length Surveyed (km) Chesil-40,000+16,0002006 to 20130.7 Sidmouth-8,700-7,3002007 to 20131.3 Exmouth-33,400-29,200 2007 to 2013 2.3 Dawlish Warren-49,600-218,000 2007 to 2013 2.8 Beesands-22,200-27,400 2007 to 2013 1.4 South Milton Sands-13,700-4,500 2007 to 2013 0.7 Seaton-26,200+11,4002007 to 20131.5 Par-27,400+16,400 2007 to 2013 0.9 Pentewan Sands-8,300-16,500 2007 to 2013 0.8 Swanpool-6,800+2,800 2007 to 2013 0.3 Loe Bar-200+6,500 2007 to 2013 0.4 Marazion-18,100+5,100 2007 to 2013 1.0 Sennen-102,000+89,000 2007 to 2013 1.2 St.Ives - Porthmeor+3,000-14,500 2007 to 2013 0.5 Hayle+94,400-90,200 2007 to 2013 2.5 Perranporth-172,200+160,000 2007 to 2013 0.8 Perran Beach-584,800+65,200 2007 to 2013 2.6 Fistral Beach-91,000+22,900 2007 to 2013 0.8 Newquay-143,300+67,100 2007 to 2013 1.9 Harlyn Bay-2,200+10,800 2007 to 2013 0.6 Polzeath-20,100+18,900 2007 to 2013 0.5 Widemouth Bay-71,800+35,000 2007 to 2013 1.0 Bude-94,800+25,300 2007 to 2013 0.4 St Mary’s – Town Beach+1,800-3892007 to 20130.5 St Mary’s – Porth Mellon+1,600-1,300 2007 to 2013 0.2 St Mary’s – Porthcressa+1,600+330 2007 to 2013 0.3 Westward Ho!-80,800-272,1002010 to 20135.2 Saunton Sands+22,300+33,2002010 to 20132.2 Burnham-on-Sea-12,000+56,100 2007 to 2013 2.5 Berrow Dunes-3,800+62,500 2007 to 2013 6.0 Brean Village (South)-3,000+17,300 2007 to 2013 1.0 Brean Village (North)+6,800+17,200 2007 to 2013 1.5 Weston-super-Mare (South)+24,500-25,600 2007 to 2013 1.6 Weston-super-Mare (North)+1,400-21,000 2007 to 2013 2.0 Sand Bay-650+9,8002007 to 20132.2

21 Most beaches lost material.

22 Porthmellon, St Marys, 20/01/2014 Photo: PCO

23 Most beaches lost material. Overall volumes similar to 2007. Prior to the 2013/14 winter storms, most beaches had accreted.

24 Harlyn Bay, Cornwall : Data from PCO

25 Most beaches lost material. Overall volumes similar to 2007. Prior to the 2013/14 winter storms, most beaches had accreted. Damage to dunes and sea defences, despite low losses.

26 Dawlish Warren Dunes 05/02/2014 Photo: PCO

27 http://www.channelcoast.org/reports/

28 Resurveyed throughout summer. Over half the beaches showing recovery.

29 Harlyn Bay, Cornwall : Data from PCO

30 Resurveyed throughout summer. Over half the beaches showing recovery. Some beaches have eroded further. Autumn interim surveys underway for further analysis.

31 http://www.channelcoast.org/reports/

32 Up to 8 storms recorded by some wave buoys. Losses observed at majority of measured sites. Recovery apparent in some cases. Further surveys underway.


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