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Coastal Landforms Revision

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Coastal Landforms Revision

  1. 1. Coastal Landforms Processes Landforms Impact on people Management by people
  2. 2. Rotational landslip Created by the structure of the rocks in the cliff Needs to have permeable rock sitting above impermeable rock.
  3. 3. Permeable rock Impermeable rock Water can infiltrate Water cannot infiltrate Water builds upFriction between the rock layers is reduced. A slip zone is created Rotational landslip
  4. 4. Label the photograph to explain how the landslip has been caused Permeable rock Impermeable rock Water can infiltrate Water cannot infiltrate Water builds up Friction between the rock layers is reduced. A slip zone is created Extension: Explain how abrasion at the cliff base/foot could speed up this process. Explain the hazards that these processes could cause.
  5. 5. Longshore Drift Foreshore Pebbles and sediment moved onto beach Pebbles and sediment moved back down the beach Pebbles and sediment moved onto beach Pebbles and sediment moved back down the beach Pebbles and sediment moved onto beach
  6. 6. Impacts of people at the coast – what’s this got to do with erosion?
  7. 7. Managing tourist activities – can you explain some different options? Choose four of these and explain how each one would help manage/control tourist activities. Create a Site of Special Scientific Interest of Area of Outstanding Natural Beauty and control how land is used and how and where building are placed. Limit the number of people who can visit a particular area of the coast. Have footpaths to control where people can walk, with clear signposts Fence off areas to prevent people walking across or accessing them. Build a visitors centre with a car park, to control where people can visit, and provide them with information and educational material. Control access to certain times of the year.
  8. 8. Managing the Coastline Beach nourishment Groynes Planting vegetation Rip rap Beach Artificially add beach material to reduce impact of erosion. Catch sand and pebbles carried by longshore drift, and reduce erosion. Break up the power of waves and reduce erosion. Break up the power of waves and reduce erosion. Hold the beach or cliff together with plant roots.
  9. 9. Hard or Soft? Beach nourishment Groynes Planting vegetation Rip rap HARD HARD HARD SOFT
  10. 10. Hard or Soft? Remove management and let the coastline flood and erode.
  11. 11. For an area that has suffered from a river flood: Name the area: Describe how the flood affected different groups of people: Explain the causes of the flood: UK Floods 2012 (River Exe; River Cam; River Avon; River Severn) Motorists Homeowners Farmers Emergency Services Rainfall Building on flood plains Global Warming and Climate Change
  12. 12. East to West Philippines, Viernam, Laos Pacific Ocean, South China Sea Depression, Storm, Typhoon, Storm 118-165 km per hour Warm water at the equator, where sun’s heat is concentrated – a key ingredient for such a low pressure to form.
  13. 13. Deaths High in Philippines Low in Cambodia Compared to Differently In comparison In contrast Whereas Nevertheless, Similarly Overall, Damage High in Vietnam Low in Cambodia Other Homelessness – High in Philippines, Low in Cambodia Evacuation not homelessness in Vietnam.
  14. 14. Flooding Impermeable surfaces Lack of drainage High population density Rapid population growth Impact of Quality of Life Environment Health Work Sewage Contaminated water Rotting materials Lack of clean water Disease spread easily People can’t get around easily People can’t go to work Workplaces damaged and closed. Quality of life will be reduced.
  15. 15. Stretch and Challenge Describe and explain methods for controlling river flooding (refer to rivers you have studied). Hard management Soft Management Weirs Concrete Walls and Banks Dams Water meadows Managed retreat

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