1998 bangladesh flood
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1998 Bangladesh Flood PowerPoint PPT Presentation


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1998 Bangladesh Flood. Causes Effects Prevention. Basic Information. Bangladesh is a relatively poor country with GDP - per capita (PPP): $1,500 (2009 est.) It is basically a large floodplain & delta formed by deposition from the major rivers that flow through it.

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1998 Bangladesh Flood

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1998 bangladesh flood

1998 Bangladesh Flood

Causes

Effects

Prevention

www.i-study.co.uk


1998 bangladesh flood

www.i-study.co.uk


Basic information

Basic Information

  • Bangladesh is a relatively poor country with GDP - per capita (PPP): $1,500 (2009 est.)

  • It is basically a large floodplain & delta formed by deposition from the major rivers that flow through it.

  • The fact that is floods has brought benefits such as fertile land and reliable water supplies. It is increasingly a problem though as the population increases.

  • It lacks resources such as minerals & metals due to the way it was formed.

  • It has a population of about 156 million.

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Human causes of flooding

Human causes of Flooding

  • Deforestation in Himalayan areas (N. Bangladesh, Nepal & India) – fuel, building material → ↓ interception & ↑ surface runoff, ↑ soil erosion.

  • Increasing populations → ↑ urbanisation → ↑ impermeable surfaces → ↑ surface runoff & ↑ speed of runoff.

  • Human influences on erosion nearer the sources of the rivers is causing increased issues from deposition in Bangladesh.

  • Lack of money leads to poor investment in flood defences (building of new ones & maintenance of existing ones).

  • Climate change attributed to human activity is raising sea levels which increases storm surge flooding events.

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Physical causes of flooding

Physical causes of flooding

  • Monsoon rains – wet season (May-Sep).

  • Snow melt from the Himalayas in the summer months.

  • Low lying land → storm surges cause flooding from the sea.

  • 3 major rivers (Ganges, Brahmaputra & Meghna) converge in Bangladesh if they are in peak flow then they are likely to flood here.

  • Bangladesh is essentially one large floodplain.

  • Formed by deposition from these rivers, Bangladesh is very flat → large areas flood when a river bursts its banks.

  • Continued deposition ↓ river channels capacity & increases likeliness of flooding.

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Effects

Effects

  • 57% of land flooded.

  • Rice crops destroyed & livestock drowned → subsequent food shortages & ↑ prices.

  • Drinking water supplies contaminated → spread of cholera & dysentery. Also a severe shortage of drinkable water.

  • 7 million homes destroyed & 25 million made homeless.

  • Almost $1 billion of damage.

  • 4750 people killed.

  • Severe damage to infra-structure (factories, roads, schools, water) leading to decreased economic output.

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Solutions

Solutions

  • In 1989  the government of Bangladesh began working with a number of international agencies to produce a Flood Action Plan.

  • This huge scheme contained 26 action points which it was hoped would provide a long term solution to the country's flooding problems.

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1998 bangladesh flood

Short Term Management

  • Boats to rescue people

  • Emergency supplies for food, water, tents and medicines

  • Fodder for livestock

  • Repair and rebuild houses, as well as services such as sewage etc

  • Aid from other countries

    Long Term Management

  • Reduce Deforestation in Nepal & Himalayas

  • Build 7 large dams in Bangladesh to store excess water $30-$40 million and 40 yrs to complete

  • Build 5000 flood shelters to accommodate all the population

  • Build 350km of embankment - 7 metres high at a cost of $6 billion to reduce flooding along the main river channels

  • Create flood water storage areas

  • Develop an effective Flood Warning Scheme

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