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11 Cards in this Set
- Front
- Back
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flooding |
caused by a surplus within the hydrological cycle |
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meteorological causes |
intense storms |
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Boscastle |
flash flood (2004) intense storm (few hours) 5 inches of rain short lag time water forced out of river channels by small landslides etc |
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human impact on flood risk (Boscastle) |
flood control system age of sewage/drainage systems obstructions to river flow e.g bridges concreter |
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uk flood 2007 (heavy prolonged rain) |
strong jet stream/ further south steering low pressure over uk rising air + warmer seas soils saturated from previous rains social impacts- 13 dead, 48000 homes damaged, damaged infrastructure economic impacts- £32billion in losses, £60million in damage to infrastructure environment impacts- triggers migration in marine environments, eutrophication, degradation of habitats due to pollution |
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monsoon |
low pressure built up over hot landmass reacting with high pressure over cooler ocean sending moisture heavy wind inland |
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indian monsoon |
Back (Definition) |
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snow melt |
released as runoff e.g in bangladesh leads to increased river discharge |
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human causes of increased flood risk |
deforestation lack of defences infrastructure urbanisation river drainage systems building in floodplain climate change river channel straightening |
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mississippi flood |
high pressure over bermuda/e.coast usa blocked the movement of a storm over mississippi leading to 5 months heavy rainfall |
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mississippi flooding causes |
levees > increased river capacity + floods with greater force wingdykes > narrows river/lowers capacity channel straightening > increased velocity of water |
