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

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Presentation transcript:

Mark Wiggins

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

Lyme Regis 05/02/2014 Photo: PCO

October 2013 to March Wettest winter for 250 years*. Up to 8 storms recorded at some PCO Wave Buoys. Largest storm waves recorded since deployment. *

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

35 Post Storm Topographic Surveys.

Location of sites assessed in report.

Lyme Regis 05/02/2014 Photo: PCO

Seaton 08/01/2014 Photo: PCO

St Ives 17/01/2014 Photo: PCO

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

South Milton 17/02/2014 Photo: PCO

South Milton, Devon Data : PCO

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

~135m

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

Survey DateVolume (m 3 )Difference (m 3 ) 27/10/ /10/ /03/ Example: South Milton Sands - Devon

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, to Sidmouth-8,700-7, to Exmouth-33,400-29, to Dawlish Warren-49, , to Beesands-22,200-27, to South Milton Sands-13,700-4, to Seaton-26,200+11, to Par-27,400+16, to Pentewan Sands-8,300-16, to Swanpool-6,800+2, to Loe Bar-200+6, to Marazion-18,100+5, to Sennen-102,000+89, to St.Ives - Porthmeor+3,000-14, to Hayle+94,400-90, to Perranporth-172, , to Perran Beach-584,800+65, to Fistral Beach-91,000+22, to Newquay-143,300+67, to Harlyn Bay-2,200+10, to Polzeath-20,100+18, to Widemouth Bay-71,800+35, to Bude-94,800+25, to St Mary’s – Town Beach+1, to St Mary’s – Porth Mellon+1,600-1, to St Mary’s – Porthcressa+1, to Westward Ho!-80, , to Saunton Sands+22,300+33, to Burnham-on-Sea-12,000+56, to Berrow Dunes-3,800+62, to Brean Village (South)-3,000+17, to Brean Village (North)+6,800+17, to Weston-super-Mare (South)+24,500-25, to Weston-super-Mare (North)+1,400-21, to Sand Bay-650+9, to

Most beaches lost material.

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

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

Harlyn Bay, Cornwall : Data from PCO

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

Dawlish Warren Dunes 05/02/2014 Photo: PCO

Resurveyed throughout summer. Over half the beaches showing recovery.

Harlyn Bay, Cornwall : Data from PCO

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

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