Coastal Management - Holderness

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  • Holderness
    • rate of coastal erosion = 1-20 per year
    • Causes
      • Physical
        • rock type- boulder clays, easily eroded
        • narrow beaches- less protection from waves
        • prevailing wind- north easterly wind, hits coast directly
        • waves have long fetch so very powerful
      • Human
        • coastal defences- groyne at mappleton. beaches are narrower, easily eroded
    • Impacts
      • loss of land, buildings and roads
      • property prices have fallen sharply
      • accessibility to settlements reduced because roads are at risk to falling into sea
      • businesses at risk, people may lose their jobs
      • gas terminal at Eastington at risk- 25m from cliff edge
      • 80,000 sp-m of farmland lost per year- huge effect on farmers livelihoods
      • loss of coastal habitats and scenery
      • slumping of material onto beach
    • Responses
      • groynes at mappleton
      • rock armour at mappleton
      • sea walls and wooden groynes at hornsea and Bridlington
    • Long term prospects
      • groynes cause narrow beaches -> increases erosion -> increased coastal retreat
      • reduced eroded material -> increases risk of flooding in Humber estuary
        • Spurn head at risk of being eroded away
      • bays forming between 1protected areas -> more expensive sea defences

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