Flooding and Flood Management

Question 1

Factors that increase the risk of flooding?

Answer 1

• Urbanisation
• Deforestation
• Farming/agriculture

Question 2

Differences between Urban flooding and Rural flooding (hydrographs)

Answer 2

• Urban has a short lag time between peak rainfall and peak discharge (surface run off from cement)
• Rural has much lower peak discharge, and longer lag time ( b. infiltration, interception and relief of the land)

Question 3

What are the flat land in the lower course of the river called?

Answer 3

Flood plains

Question 4

D. Bankfull?

Answer 4

When a river is full up to its bank