South Asia - river flooding

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  • Created by: Revisiola
  • Created on: 08-05-16 13:43
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  • South Asia- river flooding 2007
    • Causes
      • Physical
        • Monsoon- 80% of rain feel in 4 months
        • Heavy rainfall- 900mm in July
        • previously saturated soil increased surface runoff and discharge
        • Peak discharges coincided
          • River Ganges and Brahmaputra
        • low-lying land
          • Bangladesh - 90% is less than 10m above sea level
        • Melting snow from the Himalayas
      • Human
        • Deforestation- less interception and root uptake
        • Urbanization - increased surface run off
        • Collapse of old dams in India caused further flooding
        • Bangladesh is a poor country so there aren't many flood defences of warning systems
    • Impacts
      • Environmental
        • rivers were polluted with sewage
        • fertile silt were deposited on floodplains
      • Social
        • over 2000 people died
        • over 100000 people caught water borne disease due to the sewage polluted rivers
        • 25 M were made homeless
        • 4000 school were affected and 44 totally destroyed
          • children lost out on education
        • Low income , few savings and little insurance limited peoples ability to recover
      • Economic
        • estimated cost - $1 billion
        • loss of livestock (80% of Bangladesh rely on livestock)
        • 550,000 hectares of land couldn't be plated with rice - price rose by 10%
        • 10,000 km of roads were destroyed

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