flooding

Question 1

what are floods?

Answer 1

overflowing of large amount of water onto normally dry land

Question 2

what are costal floods?

Answer 2

• along coastal area

- caused by intense storms(tropical storms & cyclones, typhoons & hurricanes)

Question 3

physical factors that increase flooding are

Answer 3

heavy rainfall, long periods of rainfall, snowmelt, steep slopes, very wet soils and rock that does not allow water to flow through

Question 4

define hazard

Answer 4

a danger of risk

Question 5

physical hazard - cause of flooding

Answer 5

tsunami

Question 6

negative impact on flooding

Answer 6

human loss, loss of possesion

Question 7

Global Warming

Answer 7

increasing temperatures cause global sea-level to rise, meaning more chance of flooding from the sea

Question 8

Urbanisation

Answer 8

concrete surfaces are impermeable and increase surface runoff

Question 9

Deforestation

Answer 9

when people cut down trees in the river basin, surface runoff increases

Question 10

saturated soil

Answer 10

when soil is saturated from prolonged rainfall, water can no longer infiltrate it. surface runoff increases

Question 11

sedimentation

Answer 11

erosion causes soil to be washed into rivers to reduce their capacity