Flooding Case Studies

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  • Created by: Isla S
  • Created on: 11-05-14 20:40

Boscastle

  • 16th August 2004
  • 310 million gallons of rainfall fell over a small river catchment
  • Localised flash flood
  • No fatalities
  • 1000s of homes/businesses & vehicles swept away
  • £62 million (insurance & loss of trade)
  • 70mm of rain in 2 hours following 2 weeks of high rainfall
  • Village sited at confluence of 3 streams (Valency, Jordan & Paradise)
  • Landslides dammed river at first - then released 3m floodwave conciding with high tide
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Tewkesbury

  • Summer of 2007
  • Rainfall totals highest for May-July in England & Wales since 1766
  • 20th and 21st July - 150mm in 2 days
  • Soil saturated, groundwater levels much higher than normal - little infiltration or percolation capacity
  • River Severn and Aron were flooded
  • Tewksbury is a confluence point
  • By 20th July - T become an island
  • Abbey was a place of refuge (60-80 people slept there)
  • M5 closed
  • Children rescued from school by tractors
  • 1 man died - car swept away
  • Homes & businesses under water
  • 350,000 without water for a while
  • 140,000 without water for a week
  • Bottled water
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Tewkesbury

Impacts

  • Economic
  • Property destroyed
  • Farmland flooded - 40,000 acres of vegetables & manure & xmas trees (one man)
  • One farmer lost £100,000 worth
  • 163,000 households effected
  • £33 billion
  • 165,000 insurance claims
  • Social
  • Community spirit increased
  • Abbey gave space for people to sleep in
  • Community was against hard engineering
  • Over 1 year after flood, 10,000 still unable to return home
  • Environmental
  • Water treatment plant has new defences (steel walls)
  • Envrionmental Agency removed bridges and digging out streams to help drain water quicker
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Bangladesh

  • July & August 2004
  • 38% of total land of the country
  • 800,000 hectares of agricultural land in Dhaka
  • 900 dead - disease from water
  • 20 million affected
  • $2.2 billion - 4% of GDP
  • Infrastructure damage

Causes

  • Lies on delta of 3 major rivers (Meghna, Brahmaputra and Ganges) - 80% of country
  • Snowmelt from Himalayas
  • Monsoon
  • Cyclones
  • 2004 - all 3 rivers burst banks
  • Population pressure - settle in flood plain areas
  • Rapid urbanisation
  • Desforestation of Himalayas and Nepal
  • Poor country - river management hard, rely on foreign aid
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Bangladesh

Response

  • Short Term: 
  • Emergency aid
  • Bi-lateral aid sent to UN agencies
  • Self-help schemes
  • Long Term:
  • Dependent on foreign aid
  • Inadequate river management schemes made by foreigners in the past
  • Small scale community based projects - saved lives
  • Flood shelters & early warning systems
  • Financial aid granted for 5 years
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