Physical causes of flooding

Question 1

Intense rainfall-

Answer 1

During periods of heavy rainfall, the soil and rocks can quickly become saturated

Question 2

Duration of rainfall-

Answer 2

Long periods of rainfall cause the soil to become saturated, leading to increased surface runoff

Question 3

Snow melt-

Answer 3

Snow builds up and then melts, releasing large volumes of meltwater

Question 4

Rocks-

Answer 4

Permeable rocks allow water to soak in, so reducing surface runoff
Impermeable rocks do not allow water to pass through them, so rainwater will run off the surface and straight in the river channel