Flooding in the UK

What is one of the main causes of flash floods in the UK?

• Seasonal drought

• High rainfall over a short period

• Low river levels

• Urban expansion

How do impermeable rocks affect river flooding?

• They allow water to flow quickly through them

• They prevent water from flowing through, increasing surface run-off

• They absorb water, reducing river levels

• They have no effect on flooding

What role does vegetation play in reducing flooding?

• It increases the volume of water reaching the river

• It reduces the amount of water available to pass through the river system

• It speeds up the transfer of water to the river

• It has no effect on water transfer

Which factor is NOT a cause of river flooding?

• High tides

• Infrequent dredging

• Low rainfall

• Steep valley sides

What is the effect of urban areas on flooding?

• They increase infiltration

• They reduce surface run-off

• They result in more impermeable surfaces

• They decrease the risk of flooding

What is one effect of river flooding on the environment?

• Increased business profits

• Erosion of land and roads

• Improved water quality

• Growth of vegetation

How does deforestation in the river valley affect flooding?

• It increases interception by vegetation

• It reduces the risk of flooding

• It increases the risk of flooding

• It has no impact on flooding

What is the impact of impermeable surfaces in urban areas?

• They increase water infiltration

• They decrease water run-off

• They increase water travelling to the river quickly

• They have no effect on flooding

Which of the following is a social effect of river flooding?

• Loss of crops

• High insurance costs

• Stress on communities

• Erosion of land

What is the effect of high tides on river flooding?

• They decrease the risk of flooding

• They stop water from being drained into the sea

• They increase water infiltration

• They have no effect on river levels