Holderness coast

  • Created by: sana.2000
  • Created on: 27-03-19 20:12
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  • Holderness Coast
    • Main reasons why holderness coast is retreating?
      • Gelogy
      • Fetch
        • exposed to winds and waves from the N/E
          • small fetch high energy
        • low pressure systems over N.sea intense strong winds
        • sea floor is deep
          • waves reach te sea without being weakened by friction with shallow beaches
      • longshore drift
        • boulder clay - produced fine sand
          • easily transported - suspension
            • sediment moved down the cliff
    • geology
      • boulder clay - (Hornsea and Mappleton)
        • deposited by glaciers from last ice age-fine clays and sand
        • fast eroding
        • weak structually/little resistenace  - porous and permeable
      • chalk - flamborough head
    • coastal landforms
      • Headlands (Chalk) Flamborough
        • Erosion along fault lines and bedding planes has created features e.g. Cliffs, arches and stacks
      • Bays
      • sloping cliffs -  due to slumping
    • Morphology
      • produce shallow, sloping cliffs
      • Discordant coast line
    • Sub-aerial processes and coastal erosion
      • boulder clay
        • rain percolates into the cliff (by cracks and permeable clay)
          • lubricated and heavy
            • slides down due to weight of gravity
              • slumping - coastal erosion
      • Chalk
        • corrasion - only significant processsub-aerial
    • Key players
      • Environmental Stake Holders
        • protect spern head - want flow of longshore drift southwards
          • mudflats to Estuary - Birdlife reserve
      • Central government
        • responsible for management - cut spending by 2010
      • stakeholders
        • toursit indsutry - greater spending on coastal protection
    • coastal managment
      • terminal groyne syndrome at - Mappleton

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