(R) Soft engineering Flashcards
1
Q
afforestation
A
- trees are planted, causing more interception
- water takes longer to reach river
- looks attractive
- wildlife habitats
- low cost
- land can’t be used for other things
- takes years to grow
2
Q
removal of vegetation from banks
A
- (dead) trees/vegetation removed
- stops the river/bridges being blocked
- water flows unobstructed
- low cost
- removes wildlife’s homes
- decreases interception
- has to be maintained
3
Q
floodplain zoning
A
- more important areas further away from the river
- recreational land (parks) closer to river
- floods are less costly
- impact of flooding reduced, parks have permeable surfaces
- expansion of urban areas limited
- doesn’t work if buildings are already there
4
Q
flood warning system
A
- warns people in advance so they can prepare/evacuate
- rivers are closely watched
- allows people to prepare
- reduces risk to life/impact of floods
- not always enough time to warn people
- doesn’t stop flooding
- people may miss warnings
5
Q
washlands
A
-land is allowed to flood
- stops other land from flooding/safe place for flood water to go
- inexpensive
- natural environment
-floodplain can’t be used for anything else
6
Q
do nothing
A
-flooding is allowed to happen
- cheap
- eroded material depsosited on fields makes them fertile
- damage is expensive
- risk and impact not reduced
7
Q
sandbags/self help
A
- people take precautions
- such as no carpets downstairs, raised doors
- cheap
- people worry less
- impact of floods reduced
- people have to pay for it themselves
- doesn’t guarentee safety
- false sense of security
