127420
Description
Mind Map by elliesussex, updated more than 1 year ago
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Created by elliesussex
almost 11 years ago
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Boscastle Floods
- MEDC
- River Valency and Jordan
- 16/8/04
- 3pm
- 3pm
- Between 11am + 6pm 133mm of rain fell
- cause rivers to burst their banks, creating a swell of water moving at 65Km/hr
- cause rivers to burst their banks, creating a swell of water moving at 65Km/hr
- Causes
- 2 air masses converged over warm land, resulted in cumulonimbus clouds
- Clouds over 10km high, created intense rainfall
- Clouds over 10km high, created intense rainfall
- 133mm fell in a short time
- ground was saturated so couldnt soak up any
rain, so ran to river as a run-off
- Boscastle is in a very steep valley so water moves rapidly into rivers
- tress cut from drainage basin reducing vegetation interception
- 2 air masses converged over warm land, resulted in cumulonimbus clouds
- FLASH FLOOD
- Management
- NOT predicted
- tourists and residents evacuated to village hall
- 7 helicopters deployed to rescue people from roofs
- 120 air lifted to safety
- 120 air lifted to safety
- Coastguards watched harbour entrance to ensure none were swept away
- 50 people rescued by firemen cutting through roofs to allow people to escape
- NOT predicted
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