Bangladesh Case Study, Natural Causes of Flooding

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  • Created by: Jessica
  • Created on: 12-01-13 20:06
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  • Bangladesh, Natural Causes of Flooding
    • Drainage basin covers 1.75 million km2.
    • Half the country is less than 5m above sea level.
    • Total rainfall is very high.
      • 75% occurs in Monsoon season, which is from June to September.
      • Monsoon season causes rivers to burst their banks and flood.
    • Dense population, 900 people per km2
    • Rapid population growth, 2.7% per annum
    • Human Causes of Flooding
      • Deforestation
        • Removal of trees in Himalayan uplands
          • Overland flow
          • Less infiltration of water
      • River Diversion
        • India's River Ganges has been diverted for irrigation purposes. This has stopped the supply of river sediment.
      • International loans
      • Overseas pressure
        • Bangladeshi Government is under pressure to invest in industry at the expense of social schemes that would help local residents.
    • 1998 Floods
      • 2/3 of the country was submerged by water.
      • 23 million people made homeless.
      • 130,000 cattle killed
      • 660,000 hectares of crops were badly damaged.
      • In Dhaka, the capital, the sewage system collapses and drinking water was contaminated.
        • Diarrhoea and dysentery affected many people who came into contact with the water.
      • Textile industry employed 1.5 million people.
        • 400 factories forced to close.
          • 166,000 jobless
      • 11,000km of roads damaged in the floods.


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