- 70% of total land in less than 1 metre above sea level.
- 10% is made of lakes and rivers
- snowmelt from the Himalayas
- monsoon rains
- tropical storms bring heavy rains and coastal flooding
- main cause was above average and long period of heavy rainfall which caused all 3 rivers to reach their peak flow at the same time.
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- deforestation in Nepal and the Himalayas decreases interception from the trees and increases surface run off.
- urbanisation on a flood plain
- dams in India have increased the amount of sediment in the rivers in Bangladesh.
- global warming has increased sea level and the amount of snow melt
- poorly maintained levees
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Impacts- short term
- 57% of land was flooded
- 1300 people killed
- 7 million homes destroyed
- 25 million made homeless
- half of cattle and poultry lost
- shortage of drinking water
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Impacts- long term
- as water levels dropped it left fields of rotting crops, wrecked roads and bridges and destroyed villages
- 2 million tonnes of rice was destroyed
- floods cost the country $1 billion
- diseases like cholera and typhoid spread quickly due to poor sanitation and lack of clean water
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reponses- short term
- boats to rescue people
- emergancy aid such as food, water tablets, tents and medicines
- food for livestock
- repair and rebuild houses and services
- aid from other countries
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responces- long term
- reduce deforestation in Nepal and the Himalayas
- build 7 dams in bangladesh to store excess water- cost $30-40 million and took 40 years to finish.
- built 5000 flood shelters
- built 350km of embankment 7 metres high costing $6billion to reduce risk of flooding along main river channels
- developed a effective flood warning scheme
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