River Processes

Question 1

What are the 4 main types of river erosion?

Answer 1

Hydraulic action

Abrasion

Attrition

Solution

Question 2

Name the 4 types of transport processes

Answer 2

Solution

Suspension

Saltation

Traction

Question 3

What is hydraulic action? And what process is it apart of?

Answer 3

The force of the river against the bank can cause air to be trapped in cracks and crevices. The pressure weakens the banks and gradually wears it away.

River erosion

Question 4

What is abrasion? What process is it apart of?

Answer 4

Rocks carried along by the river, wear down the river bed and banks

River erosion

Question 5

What is attrition? What process is it apart of?

Answer 5

Rocks being carried by the river, smash together and breaks into smaller, smooth and rounder particles

River erosion

Question 6

What is solution when talking about river erosion?

Answer 6

Soluble particles are dissolved in water

Question 7

What is solution when talking about river transportation?

Answer 7

Minerals are dissolved in the water and carried along in solution

Question 8

What is suspension? What process is it?

Answer 8

fine light material carried along in the water

Transport

Question 9

What is saltation? What process is it apart of?

Answer 9

Small pebbles and stones are bounced along in the river bed

Transport

Question 10

What is traction? What process is it apart of?

Answer 10

Large boulders and rocks are rolled along the river bed

Transport

Question 11

What does high energy levels do in transport?

Answer 11

• large rocks and boulders can be transported
• nearer the river source=higher energy (steep course and narrow valley)
• when floods=higher energy

Question 12

What does low energy levels do to transportation?

Answer 12

-only small particles can be transported
-at mouth-velocity drops(lowest energy)
This is when deposition occurs