Geography, Global Hazards, case studies, Boscastle flood
- Created by: liv.liv
- Created on: 12-04-22 13:24
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- Boscastle
- Causes
- Physical
- Heavy localized rainfall
- 89mm fell in an hour
- ground saturated
- river levels rose 2.15 meters in one hour
- rainfall from end of hurricane Alex
- meeting place of three rivers, Valency, Jordan and paradise
- found at a steep sided valley
- Impermeable geology, water can't be absorbed
- Heavy localized rainfall
- Human
- street pattern and man made structures worsened flooding
- bridges blocked the flooding as cars and vegetation got stuck underneath
- Old sewer systems were inefficient
- Vegetation had been removed, could have absorbed water
- Physical
- Effects
- houses, hotels and businesses flooded (58 properties)
- 90% of the economy relied on tourism
- 4 bridges washed away
- 100 cars swept away
- trees uprooted
- Students now go and study the flood and its defenses
- visitors center and witchcraft museum severely damaged
- houses, hotels and businesses flooded (58 properties)
- Responses
- Short term
- 100 people air lifted to safety by seven helicopters
- Buildings searched
- sandbags used to hold back water
- but were ineffective due to amount of water
- 120 people rescued all together
- high winds made it difficult to rescue people
- Long term
- the environment agency spent £100million on flood defenses in the area
- Carpark raised
- riverbed was lowered and widened
- new culverts installed (place for water to travel)
- Bridges raised and rebuilt
- trees removed
- Short term
- Causes
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