Flooding

Created by

Grace Abodunwa

Cards (18)

What is flooding?
Flooding is when the river overflows its banks.
What are two human causes of flooding?
Urbanisation
deforestation
Why does deforestation increase flooding?
Trees absorb water through transpiration from the soil. So if the trees are cut down then less infiltration is happening, which increases the rate of surface run off as the water remains on land.
How does urbanisation increase flooding?
Urbanisation includes roads. When building roads impermeable material is used, meaning there will be less infiltration but more surface run off as the water cannot pass through the ground.
What are two physical factors of flooding?
Impermeable Geology
steep slopes
How does steep slopes increase flooding?
More water has been passed to the river so the river can flow very quickly, reducing infiltration
How does impermeable geology increase surface run off?
The rock is impermeable meaning less infiltration and more surface run off.
What is impermeable rock?
When water isn't able to infiltrate into the ground
What is permeable rock?
When water is able to infiltrate into the ground.
What is the case study for floods?
The jubilee flood relief scheme
What towns did the jubilee flood relief scheme prevent floods in?
Windsdor, Maidenhead and Eton
When did the jubilee flood relied scheme start?
2002
What are the positives of the jubilee flood relief scheme?
It protects homes and businesses
What are the drawbacks of the jubilee flood relief scheme?
It costs a lot and it had environmental impacts
Other than stopping floods from happening, What else does the jubilee river transfer scheme do?
It provides a walking paths and a place for people to admire wildlife
What does the river transfer scheme do when there is heavy rainfall?
It diverts excess water
What does lateral mean in terms of rivers?
The river is more wider and horizontal
What does vertical mean in terms of rivers?
That River is moving downwards and its more vertical