AQA Geography Hard Engineering

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  • Created by: Catherine
  • Created on: 29-03-13 14:26
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  • Case Study: Hard Engineering - Three Gorges Dam, China
    • Social
      • 14  million homeless
      • Forced resettlement of 1.3 million people
      • Improved navigation along river - useful for trade
      • Community and history disappears -2300 years worth
    • Economic
      • Reservoir behind dam £25 billion.
      • Reduced  risk of flooding for 15 million.
      • Need for maintenance.
      • Sediment build-up needing dredging.
      • 85 Billion kilowatts created.
    • Political
      • Withstand  earthquakes
      • No flooding and less problems for future
      • Expensive& a lot of work
    • Environmental
      • Deforestation (3000 acres), land slides and animals disturbed
      • Farmland and tourists attractions destroyed
      • Reservoir 100m high, 2.3 km long
      • Increased downstream erosion
      • Toxins - 16,000 factories
      • Generate electricity from HEP for Central an Eastern China
        • Clean energy - no fossil fuels
      • Between1998-2004 sediment transport fell by 50%
    • WHAT?
      • Banks/ channel modification - strengthened and raise artificially
      • Retention basin + balance lakes divert when high discharge
      • Dredging - make deeper channel (greater volume allowed pass)
      • Diversion channels - send away from flood risk areas
      • Dams + Weirs to regulate water
  • Sediment build-up needing dredging.
  • Economic
    • Reservoir behind dam £25 billion.
    • Reduced  risk of flooding for 15 million.
    • Need for maintenance.
    • 85 Billion kilowatts created.

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