geography- soft/hard engineering- reduce flooding
- Created by: zhzstudent
- Created on: 08-02-14 17:12
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- Water On the Land
- soft engineering to reduce impacts of flooding
- flood warnings
- what?
- environment agency warn through tv, radio, internet
- +
- reduced impact
- give people time to move things
- place sandbags
- to evacuate
- -
- don't stop flood
- can't access warning
- frequent flood= difficut to get insurance
- what?
- preparation
- what?
- modify buildings-reduce damage caused
- make plans
- important document kept upstaires
- keep emergency supply
- +
- impact reduced
- less damaged building
- locals know what to do
- less worried
- -
- doesn't gurantee safety
- false sense of security
- expensive to modify infrastructure
- what?
- flood plain zoning
- what?
- restriction- stop building on flood plain areas thats likely to flood
- +
- reduced risk
- less impermeable surface created
- reduced impact
- reduced risk
- -
- limited urban area expansion
- no use if already built up
- what?
- do nothing
- no money spent=no new engineering
- flooding= naural process
- +
- flooding=deposited material on flood plain
- fertile farmland
- flooding=deposited material on flood plain
- -
- risk and impact still there
- flood warnings
- Hard engineering=control river flow=reduce flooing
- dams and resevoirs
- what?
- dams built acroos rivers
- in upper course
- resevoir behind dam
- dams built acroos rivers
- +
- resevoir store water in prolonged rain period
- reduce flooding risk
- used to drink
- used for HEP power
- resevoir store water in prolonged rain period
- -
- expensive to build
- need to flood existing settlement
- eroded material desposited in resevoir
- not rivers natural course
- farmland downstream = less fertile
- not rivers natural course
- what?
- channel straightening
- what?
- straighten river course
- cut out meander using artificial straight channels
- straighten river course
- +
- water move out of area more quickly
- reduce flooding risk
- water move out of area more quickly
- -
- flooding = downstream instead
- flood water carried there faster
- more erosion downstream
- faster flowing water
- flooding = downstream instead
- what?
- dams and resevoirs
- soft engineering to reduce impacts of flooding
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