RBM

Question 1

To reduce negatives of a river basin X4

Answer 1

Ensure enough water available for each person

Reduce effects of low annual rainfall

Reduce effects of siltation

Reduce effects of flooding

Question 2

Ensure enough water available for each person X3

Answer 2

People use water to drink

Availability declined because of increased population

Places suffer from lack of clean water (cholera)

Question 3

To reduce effects of low annual rainfall X3

Answer 3

Lead to drought leaving too little water for farming

Enable existing water supplies to be stored and shared equally

Water can be transferred from an area of water surplus to areas of water deficit

Question 4

To reduce effects of siltation
X1

Answer 4

Can reduce volume of rivet channel = more likely to flood
—>Dams trap sediment reducing siltation reducing flood risk