Hard Flood Management Scheme Flashcards
In terms of flooding
What is hard engineering?
Using man made structures to prevent flooding!
In terms of flooding
What is soft engineering?
Working with the natural processes of the river to prevent flooding.
List 4 hard flood management schemes!
- Dam and Resevoirs
- Channel Straightening
- Embankments and Levees
- Flood Relief Channel!
What is Dam and Resevoirs?
Reduce risk of flooding by controlling the rate of flow. Store in resevoirs when high flow!
Costs(disadvantages) of Dams and Resevoirs?
Destroy ecosystem and ugly looking
Benefits of Dams and Resevoirs?
Multipurpose (e.g reservoirs for drinking water)
One example of Dams and Resevoirs!
Clywedog Dam!
What is channel straightening?
Cutting through meanders to create straighter channels!
Costs of channel straightening?
More risks downstream!
Benefits of channel straightening?
Faster Flow
What is Embankments/Levees ?
Raised river bank to increase capacity of the river channel! Dredging increased carrying capacity!
Costs of Embankments/Levees ?
- Ugly
- Requires maintenance
Benefits of Embankments/Levees ?
- Cheap
- Reduced flooding risks
What is Flood Relief Channel?
Man made river channel to take water around uban area.
Costs of flood relief channel?
- Expensive
- Giving up farmland
- More risk downstream
