Flooding

Question 1

Flood

Answer 1

Water extends past normal limits

Question 2

Physical factors

Answer 2

Natural

Question 3

Human factors

Answer 3

Man made

Question 4

Process of flood

Answer 4

1 - rains heavy
2 - rain can’t soak into ground fast so water runs over surface into river
3 - river Lebel rises rapidly. River floods

Question 5

Heavy rain

Answer 5

Physical + water can’t infiltrate

Question 6

Soggy soil

Answer 6

Physical + soil already full can’t take anymore water

Question 7

Impermeable rock

Answer 7

Physical + water can’t pass through

Question 8

Steep slopes

Answer 8

Physical + water runs down quickly

Question 9

Built up areas

Answer 9

Human c more impermeable surfaces

Question 10

Loss of trees (deforestation)

Answer 10

Less interception + less water soaked up + less transpiration + human

Question 11

Flat flood plain

Answer 11

Physical + easily flooded

Question 12

Tributaries

Answer 12

Physical + more tributaries = greater risk of flooding

Question 13

Bridges + culverts

Answer 13

Human + make rivers narrower restrict flood

Question 14

Build dams

Answer 14

+ controls flow of water.
+ water flow used to generate energy - hydro electricity power.
- expensive and land has to be flooded

Question 15

Levees + concrete

Answer 15

+ tall levees mean river holds more water.
+ concrete banks smoother and speed flow.
- spoils look of river.
Loss of wildlife habitats

Question 16

Plant trees

Answer 16

+ intercept more water and absorb some

- take years to reach maturity and needs lots of space.

Question 17

Widen river

Answer 17

Digging out a larger channel

- loss of wildlife habitat

Question 18

Deepen river

Answer 18

Dig out deeper channel

- loss of wildlife habitat

Question 19

Straighten river

Answer 19

Speeds flow.

Question 20

Controlled flooding

Answer 20

Planners allow designated areas to flood so it doesn’t affect cities and town downstream

Question 21

Overflow channel

Answer 21

An extra channel that a can be opened when there is a risk of flooding.