AQA Rivers - Flood risk

What does vegetation cover affect in terms of rainfall?

• The temperature of the area

• The speed of wind over the area

• The amount of sunlight reaching the ground

• The amount of interception and stemflow

How does soil type influence flood risk?

• By its capacity to absorb water through infiltration

• By altering the taste of groundwater

• By affecting the soil's temperature

• By changing the colour of the soil

What impact does rock type have on a river basin?

• It changes the river's color

• It affects the river's flow speed

• It impacts flood risk through permeability

• It alters the river's taste

How does local climate affect flood risk?

• By influencing rainfall distribution

• By affecting the river's temperature

• By altering the types of fish in the river

• By changing the water's pH level

What does a high drainage density indicate?

• More fish in the river

• Cleaner water

• Greater risk of flooding

• Lower risk of flooding

How does antecedent rainfall affect flood risk?

• It has no effect

• It decreases flood risk

• It increases flood risk

• It changes the river's direction

What effect does slope and gradient have on flood risk?

• Steeper gradients decrease flood risk

• Flatter land increases flood risk

• Steeper gradients increase flood risk

• Flatter land has no effect on flood risk

How does urban land use affect flood risk?

• By altering the land's temperature

• By preventing water infiltration

• By affecting biodiversity

• By changing the land's color

What is the effect of permeable soils on water flows?

• They increase infiltration

• They decrease surface runoff

• They increase surface runoff

• They have no effect on water flow

How does deforestation impact flood risk?

• It increases flood risk by reducing water absorption

• It decreases flood risk by reducing water resistance

• It has no effect on flood risk

• It increases flood risk by increasing water temperature