Holdernesss Coast Mindmap

  • Created by: TJM4
  • Created on: 19-05-18 15:21
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  • The Holderness Coast
    • Key Facts
      • Fastest eroding coastline in Europe
        • Average rate of retreat is 2m per year
        • Some places can erode 20m+ in a year
      • It is 61km long
        • Stretches from Flamborough Head to Spurn Point
      • Over 30 villages lost along the coastline over the years
    • Reasons for erosion
      • Easily eroded rocktype
        • The cliff is made from boulder clay which is likely to slump when it is wet that causes the cliff to retreat
      • It has naturally narrow beaches
        • Beaches slow waves down by reducing their erosive power. This means that narrow beaches give less protection to cliffs behind
      • People worsening the situation
        • Groynes have been built which makes beaches further down the coast narrower increasing eroding
      • Powerful waves
        • Strong winds from the north east creates powerful waves which erode the coast down faster
      • Wet stormy weather
        • The north east is prone to wet stormy weather. This causes the cliffs to become saturated which causes slumping. They are then battered by stormy waves causing cliff collapse
    • Managment
      • In 1991 almost £2 million was spent on two rock groynes and a rock revetment to protect Mappleton and the B1242 road
        • The rocks were granite imported from Norway
        • The rock groynes were intended to trap beach material
        • Result
          • A substantial amount of beach has accumulated between the groynes halting erosion
          • Further south the rate of erosion has increased significantly because of material which is being carried south is not being replaced is it has been trapped in the groynes
            • This means that further south there is no beach to protect the cliff

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