Floods Flashcards
1
Q
How can floods be prevented?
A
- Planting trees
- river channels are made larger by dredging
- walls (flood embankments) are built
- flood relief channels are built around towns
2
Q
What is a flood?
A
When there is too much water for a river channel to hold
3
Q
When do floods occur in the UK?
A
Early spring when heavy rain and melting snow combine
4
Q
What is alluvium?
A
- Material that a river flood carries that is deposited on surrounding land
- this creates a floodplain
5
Q
Why does alluvium attractive farmers?
A
Because it is very fertile
6
Q
What is a flash Flood?
A
A flood that happens without warning
7
Q
Where was a recent flash flood?
A
Spanish Pyrenees
8
Q
What are the natural causes of flooding?
A
- Heavy rainfall
- snow that melted
9
Q
What are the human causes of flooding?
A
- removal of trees (roots suck up water)
- concrete surfaces because they don’t allow water to pass through
