River discharge and flooding

Question 2

Heavy rainfall

Physical factor

Answer 2

Heavy rainfall means that water arrives too quickly to infiltrate, so ther’s lot’s of surface runoff, which increases discharge

Question 3

Geology (rock type)

Physical

Answer 3

impermeable

Question 4

Prolonged rainfall

Answer 4

Prolonged rainfall can saturate the soil.
Any further rainfall can’t infiltrate, increasing runoff into river channels

Question 5

Relief

Answer 5

If a river is in a steep sided valley, water will reach the river channel quicker because it can flow faster dowm the steep slopes - this rapidly increases dischage