River Case Studies

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  • River Case Studies
    • Boscastle floods
      • 16th august 2004 - river Valancy
      • intense precipitation 84mm in one hour
      • old sewer/drainage systems
      • 2m water level rise in 1 hour
      • farming changes
      • 20,000,000m3 through village
      • 6 homes.
      • 75 cars
      • 150 airlifted
      • £25m lost from businesses
      • £10m defences
    • Bangladesh floods
      • 70% 1m sea level
      • cyclone (GORKY)
      • 5000 immediate deaths by flooding each year
      • 2/3 country affected
      • 20% reduction in crop production. 2.3m tonnes rice destroyed
      • 33000 volunteers -education
      • 7 proposed dams 10%water held back.
    • Three Gorges Dam
      • Yangtze River
      • control 22.15 b m3. protect 1500000 hectares farmland. 15 million lives.
      • £500m to recover previous floods
      • 84.6b KW/hour = 18 nuc stations.
      • shipping 35% cheaper.
      • 2008 800,000 tourists - £15.6m revenue
      • 1.4m relocated
      • yanftze river dolphin. deep cold water behind dam.
      • 13 large towns flooded.
    • River Quaggy
      • Sutcliffe Park - heavily managed
      • £1.1m funding
      • 85000m3 storage. 600 homes.
      • less flooding in Lewisham
      • Living wetlands award

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