Rivers 2.2 : Boscastle case study
- Created by: ajcb16
- Created on: 03-03-18 22:05
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- RIVERS :BOSCASTLE CASE STUDY
- Impacts
- Short Term Impacts
- limited resources in times of need
- no transport
- 75 cars and 6 houses washed to sea
- several boats lost
- people clinging to trees ,roofs of buildings and cars
- Long Term Impacts
- high mountainous land means that the water will flow quickly so it could happen again
- Sparsely populated area means that there is a lack of resources in time of need
- No electricity
- Long term injuries caused
- Financial issues caused replacing house and car
- Loss of tourism (90% of economy)
- 2/3 of tourism come in school hoildays
- Short Term Impacts
- Causes
- Human
- Deforestation
- less water intercepted
- more water reaches the ground so less evapotranspiration
- rapid surface runoff.
- more water reaches the ground so less evapotranspiration
- less water intercepted
- Narrow bridge in lower part of the village trapped debris and acted like dams
- Deforestation
- Physical causes
- Heavy localised rainfall. 89mm in 1 hour
- Saturated ground from previous rainfall
- Topography of the land
- Landscape acts as a funnel directing vast amounts of water into the village
- Narrow river channel in village itself
- Human
- Responses
- Main bridge rebuilt so that it spans the river
- spans the river and stops trees getting caught and blocking channel flow
- River Jordan overflow culvert widened
- stops the river from overloading and flowing down the road
- River channel deepened by 0.75 m
- increases river capacity and more water can flow in the case of a flood
- river made straighter
- allowed water to move more quickly
- old bridge replaced with a modern bridge
- Some of grass banks was taken out to widen the river
- increased flow and capactiy
- Trees and other follage removed from the edge of the river
- cannot be caught in a flood
- car park raised
- stop cars being caught in a flood
- avoids blockage in the channel
- £4.5 million scheme to improve defences
- Main bridge rebuilt so that it spans the river
- Specific place detail
- £4.5 million scheme to improve flood defences
- 90% of economy is tourism
- 89mm of rainfall fell in 1 hour
- channel deepened by 0.75m
- River Valency
- 16th of August 2004
- cost 15million pounds by 2005
- 58 flooded buildings
- 25 destroyed busissnesses
- 100 lives saved
- 7 helicopters came
- River Jordan and Valency confluence
- Impacts
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