Bangledesh 2004 Floods - Case Sudy

Case study on the 2004 floods

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CASE STUDY ­ Bangladesh 2004 Floods
Bangladesh
- A low lying country where most lies on the delta of the
Ganges, Meghna , Brahmaputa & Jamuna River
- The country is in stage 3 of the DTM
- The GDP per Capita is $551
- The country is 143,998 Square Km
- Population is about 165 million
- It is bordered by India and Burma to the east and west
and to the south is the Bay of Bengal
The Flood
During July and August 2004 during the monsoon season more rain was brought than usual which
resulted in about 38% of the land was flooded including the capital Dhaka and 800,000 hectares of
agricultural land
Causes
Physical
Low Lying Country:
· 70% of its land area being less than 1m above sea level.
· 80% of it being floodplain.
· Delta of Ganges, Megnha , Bramaputa & Jamuna river
Monsoon Climate:
· In summer the EurAsian continental land mass warms up
faster than the Indian Ocean. The warm air rises creating a
Low Pressure. Moist air blows from the relative High
Pressure of ocean bringing rain. This is the Monsoon.
· Most places in Bangladesh get over 1500mms of rainfall.
· In 2004 heavy rains in early June led to the Meghna
flooding bursting its banks in north east Bangladesh by
early July.
· Further heavy rains caused flash flooding in the north on
the Brahmaputra in July. The floods spread and eventually impacted on the capital
Dhaka in mid-August.
· More intense thunderstorms in September in this event four days of heavy rain
averaged 300mms a day
Snow Melt in Himalayas:
· Every summer the warming leads to snowmelt in the high
Himalayan rivers and glaciers that feed the major rivers
like the Ganges and Brahmaputra that flow down to
Bangladesh. T
· This snowmelt adds to the risk of flooding.
· Global warming has increased the rate of melting (human
activity)

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Rivers: (Ganges, Bramupta, Meghna & Jamuna)
· High compared to flood plain
· Confluence of all 4 rivers
· Large drainage basin
· About 30% of the country floods annually
· About 80% of Bangladesh is alluvial floodplain
· Bangladesh is very low lying and flat with most of the country under 10 metres,
making it susceptible to both river and sea flooding.…read more

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Dams trap silt and thus it is no longer deposited on the flood plain in Bangledesh.
· All land areas are occupied including includes sandbanks called Chars in the river
channels and without additional silt they are subject to erosion and flooding.…read more

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Responses
Short Term
· NGOs provided emergency relif in forms of rice, clothing, medicines, blankets and
towels
· UN activated a disaster management team to co-ordinate various UN agencies in
July and they supplied critical emergency supplies, conducted damage and needs
assessment in affected areas
· Bilateral aid from individual countries was directed to the UN teams
· Emergency shelters opened
· Emergency relief of rice, clothing, medicine and blankets given.…read more

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