Holderness Coast - United Kingdom
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CASE STUDY

Title Holderness Coast
National level United Kingdom
Regional level Yorkshire

ABSTRACT

The Holderness coast mainly consists of soft glacial drift cliffs, which have been cut back up to 200m over the last century. The coast is subject to the full force of the waves from the North Sea, with little attenuation before they reach the cliff line. The sea is continually able to reach the base of the cliff. Generally, the natural beaches of Holderness are almost always narrow and unable to stop wave erosion.

The sea attempts to build up an equilibrium gradient by eroding these soft cliffs behind the beach, to which the strong waves have easy access. This inevitably means that some of the Holderness coast will be eroded in order to achieve a more efficient coastal shape. On average, the coastline of Holderness erodes at about 2m per year, mainly during storms and tidal surges. The impacts of coastal erosion on socio-economic aspects are: damage and loss of infrastructures, loss of property, loss of farmland, danger for tourism, damage to coastal protection.

The effectiveness of the measures taken on the Holderness coast are variable, but in general hard measures are successful in stopping or at least slowing down the erosion locally. However, due to the use of hard measures, erosion has increased downdrift of them. In between the towns with a fixed coastline, bays seem to be developing due to this erosion. The sea defences seem to be creating artificial headlands because erosion continues on both sides. As time goes on, this could mean that the headlands (towns) become more and more exposed to the force of the waves, while the coast in between the headlands will erode more and more until a stable bay is formed.

Human interference, such as sea defences, causes rapid erosion of the unprotected beaches and cliffs. To counter this, local and regional authorities are nowadays trying set up integrated coastal zone management programmes for the whole coastline.

BASIC INFORMATION

Coastal characteristics
  • Study area: 61 km ; Sedimentary cell: 3 areas (north, middle, south)
  • Type of coast: soft rock coast, beaches (with glacial mud, sand and boulders) .
  • Tidal regime: macro tidal (up to 7 m)
  • Wave climate : fetch-limited wind wave development. Annual storms Hsig= 4 m T= 7s
  • Other: Sea level rise (6 mm/year) and land subsidence.
Policy options Hold the line, do nothing
Socio-economic activities Tourism and recreation, urbanisation, fisheries and aquaculture, agriculture and forestry, industry, transport and energy, nature and conservation.
Engineering techniques Timber groins, drains, seawall, revetments

SOURCE

Name Paul Sistermans
Odelinde Nieuwenhuis
Institution DHV group
Address Laan 1914 nr.35, 3818 EX Amersfoort
PO Box 219 3800 AE Amersfoort The Netherlands
Telephone / fax +31 (0)33 468 37 00 / +31 (0)33 468 37 48
Email paul.sistermans@dhv.nl
odelinde.nieuwenhuis@dhv.nl