Water cycle, rivers, storms and drainage basins

The process of light sediments (e.g. sand) bouncing along the ground/river is called ___________?

River flow is usually fastest in which part of the river course?

• Upper course

• Middle course

• Lower course

What type of lake is pictured?

River discharge is measured in what unit?

What is likely to happen to sediment at a river mouth?

• Erosion

• Saltation

• Traction

• Deposition

What river velocity is needed to transport pebbles?

• 50 cumecs

• 20 cumecs

• 10 cumecs

• 5 cumecs

• 1.5 cumecs

Which of the following is a negative impact of sedimentation?

• Muddy sediments can smell bad

• Sediments can fill dams/reservoirs, limiting water holding capacity

• Sediments can limit aquatic plant growth and fish production

• All of the above

What instrument is being used in this photo?

The process of river erosion caused by sediments hitting the river bed during transport is called?

• Solution

• Abrasion/Corrasion

• Cavitation

• Hydraulic action

The process of river erosion caused by chemicals breaking down rocks in the river is called?

• Solution

• Abrasion/Corrasion

• Cavitation

• Hydraulic action