Chapter 4- Flooding Flashcards Preview

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Flashcards in Chapter 4- Flooding Deck (9)
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1

What is flooding?

A flood occurs when a river has too much water in its channel so it spills onto the surrounding land

2

Causes of flooding (physical factors) ?

Dam failure
River overflow
Strong winds in coastal areas
Air pressure
Intense precipitation
Ice or snow melts
Levee breaking

3

Causes of floods ( human )?

Urbanisation
De-forestation
Building in the drainage basin

4

What are the effects of flooding?

Homes - furniture destroyed, costing money and insurance is expensive
Farm animals may drown
Crops are destroyed- this means people may starve
Sewage systems overflow- drinking water is contaminated
Travel and transport can be disrupted

5

How are floods prevented?

Planting trees in the river basin- trees break rainfall and use up water
River channels are made larger by DREDGING- so they can hold more water
Walls called flood embankments are built to increase height
Flood relief(by-pass) channels are built around towns.

6

What is a flash flood?

A flash flood is a flood that happens suddenly with little warning.

7

Why are flash floods dangerous?

They happen so quickly people can't prepare

8

What are the causes of flash floods?

Intense / heavy rainfall
Dam breaking/ failing
Snow/ice melting

9

What are the Impacts of flash floods?

Animals drown
Crops die
People are injured
Houses are damaged
Death
High repair cost
No electricity