flooding in more developed world: Boscastle
- Created by: Jenny Jones
- Created on: 12-03-14 21:25
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- The Boscastle Floods: August 16th 2004
- Physical Causes
- Rainfall
- hot day in August
- torrential thunderstorm 60mms in two hours
- tall convectional clouds
- remnants of Hurricane Alex
- Valley Shape
- steep sided deep valleys of River Valency and River Jordan (confluence)
- valley funnel the water down towards Boscastle
- river runs off high ground of Bodmin Moor (relief rainfall)
- Geology
- impermeable rocks (slates and granite) and clay soils
- Rainfall
- Human Causes
- Site
- Boscastle built beside the sea of a flood plain at the end of the narrow river valleys
- Site
- Effects
- approx 1000 residents + visitors affected
- no fatalities, only one reported casualty
- 7 helicopters airlifted 100 people to safety
- 20 out of 31 Cornwall Country Fire Brigades involved assisting in clean up operation
- 58 properties flooded
- 4 footbridges along River Valency washed away
- 84 wrecked cars
- infrastructure damage to buildings and services could cost up to £2 million
- Further Prevention Measures
- 1 in 400 year event - less need to act
- no one killed - less need to act
- new culvert on River Jordan
- Physical Causes
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