Geography ocr b- coasts

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  • Created by: Alice
  • Created on: 21-04-13 09:49
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  • Coasts
    • Waves
      • Formed by the movement of the wind over the surface of the water causing friction
      • Swash- movement of wave up beach
      • Backwash- movement of wave back down beach
      • Underlow- water moves back down beneath the water's surface
      • Strong wave
        • 1. wind is stroger
        • 2. wind blows for longer
        • 3. larger fetch
      • Constructive waves
        • strong swash, weak backwash
          • gentle- associated with summer/ calm
            • lower energy
              • Debree deposited on beach
        • Destructive waves
          • Quite strong swach, stronger backwash
            • cliff attacked, eroded material removed by wave
              • Less beach to absorb wave energy- process continues
    • The coastal system
      • 1. Erosion and weathering
        • 2.Transportation
          • 3. Deposition
            • Depositing material, building new land
          • Movement of material
        • erosion- rocks disintegrated by movement
        • weathering- disintegration without movement
    • Erosion processes
      • Abrasion
        • waves throws debree at cliff face- over time, wears away
      • Attrition
        • material in waves collide with one another as breaks on beach
      • Hydraulic Action
        • airs compressed into gaps in cliff- air released explosively
    • Weathering
      • 1.Corrosion(solution)
      • 2.salt crystals
      • 3.wetting and drying of clay
      • Untitled
  • Why are coasts important?
    • Coasts
      • Waves
        • Formed by the movement of the wind over the surface of the water causing friction
        • Swash- movement of wave up beach
        • Backwash- movement of wave back down beach
        • Underlow- water moves back down beneath the water's surface
        • Strong wave
          • 1. wind is stroger
          • 2. wind blows for longer
          • 3. larger fetch
        • Constructive waves
          • strong swash, weak backwash
            • gentle- associated with summer/ calm
              • lower energy
                • Debree deposited on beach
          • Destructive waves
            • Quite strong swach, stronger backwash
              • cliff attacked, eroded material removed by wave
                • Less beach to absorb wave energy- process continues
      • The coastal system
        • 1. Erosion and weathering
          • 2.Transportation
            • 3. Deposition
              • Depositing material, building new land
            • Movement of material
          • erosion- rocks disintegrated by movement
          • weathering- disintegration without movement
      • Erosion processes
        • Abrasion
          • waves throws debree at cliff face- over time, wears away
        • Attrition
          • material in waves collide with one another as breaks on beach
        • Hydraulic Action
          • airs compressed into gaps in cliff- air released explosively
      • Weathering
        • 1.Corrosion(solution)
        • 2.salt crystals
        • 3.wetting and drying of clay
        • Untitled
    • Economy/ jobs eg. fishing and tourism
      • eg. blackpool
    • Industry eg. ports and boat yards
      • Portsmouth
    • Flat land- easy to build on

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