AS River Processes

Which of the following are river processes?

• Erosion

• Transportation

• Deposition

• Disposition

This type of erosion refers to the wearing away of the bed and bank by the load carried by a river.

• Abrasion (corrasion)

• Attrition

• Hydraulic Action

• Corrosion (solution)

This type of erosion refers to the wearing away of the load carried by the river, making them smaller and rounder.

• Abrasion (corrasion)

• Attrition

• Hydraulic Action

• Corrosion (solution)

This type of erosion is intensified by high river velocities, high levels of river discharge, and the presence of air bubbles.

• Abrasion (corrasion)

• Attrition

• Hydraulic Action

• Corrosion (solution)

True or False: Corrosion (solution) is intensified by fast-flowing undersaturated acidic water.

• True

• False

Which of the following factors intensify erosion rates?

• Heavier and sharper load

• Higher velocity (fast-flowing rivers)

• Increased gradient (steep slopes)

• Creation of dams

Transport B in the diagram is...

• Suspension

• Saltation

• Traction

• Solution

Transport D in the diagram is...

• Suspension

• Saltation

• Traction

• Solution

True or False: The heaviest load is transported by suspension.

• True

• False

Which factors would NOT lead to deposition of sediments?

• An increase in gradient

• A decrease in the volume of water in the channel

• An increase in the friction between water and channel