Causes Of Flooding

Question 1

What are the 3 human causes of flooding?

Answer 1

Deforestation
Urbanisation
Agriculture

Question 2

What is the affect with heavy rainfall?

Answer 2

Ground becomes saturated and water can no longer infiltrate through, instead water will travel over the surface (surface run off) and reach the river quickly

Question 3

How can soil and rock type affect flooding?

Answer 3

Permeable rock - water soak into ground - low flood risk

Impermeable - water can’t infiltrate - high flood risk

Question 4

How can snow melting affect flooding?

Answer 4

Rise in temp melt snow and create water and if ground frozen the ground is impermeable

Question 5

How does deforestation affect flooding?

Answer 5

Trees intercept rainfall - trees are cut down

Transpiration - release water into atmosphere

Question 6

How does urbanisation affect flooding?

Answer 6

Concrete and Tarmac are impermeable

Question 7

How does agriculture affect flooding?

Answer 7

Up and down ploughing - gullies for water to run down to rivers
Animals compact soil - impermeable

Question 8

What are the 3 physical causes of flooding?

Answer 8

Heavy rainfall
Soil and rock types
Snow melting