River Processes

Question 1

What are the 3 river processes

Answer 1

Erosion, transport, deposition

Question 2

What are the different erosion types

Answer 2

Hydraulic action, abrasion, corrosion

Question 3

What are the different transport ways

Answer 3

Traction, saltation, suspension, solution, flotation

Question 4

What is meant by the term deposition

Answer 4

When the river load is dropped and remains stationary on the river bed or bank

Question 5

Definition of hydraulic action

Answer 5

The force of water

Question 6

Definition of Abrasion

Answer 6

Material picked up and rubbed against the river bank or bed (sand paper effect)

Question 7

Definition of Altrition

Answer 7

When one rock hits another and they get smaller

Question 8

Definition of corrosion

Answer 8

Water dissolved the rock

Question 9

Definition of traction

Answer 9

Moves heavy stuff in the bed of the river

Question 10

Definition of saltation

Answer 10

Bounces off the bed of the river (medium heavy)

Question 11

Definition of suspention

Answer 11

Hanging in the water (light)

Question 12

Definition of solution

Answer 12

When it’s dissolved in the water

Question 13

Definition of flotation

Answer 13

Being transported from the surface of the river

Question 14

When does deposition occur. Why?

Answer 14

When there is not enough energy to transport the load. This can occur because -the slope is too gentle
-too many obstacles
-fall in velocity
-large dense deposited first

Question 15

Definition of discharge in a river

Answer 15

Amount of water flowing in a river

Question 16

Where would the deepest area be in a river

Answer 16

Lower course because there would be more water

Question 17

Where would the river be widest

Answer 17

Lower course at the mouth

Question 18

Where is the load particle size the greatest in the river

Answer 18

Near the source , upper course

Question 19

Where would the gradient of a river be the steepest

Answer 19

Near the source, upper course

Question 20

Definition of Thalweg

Answer 20

The fastest channel of the river

Question 21

When does the river energy increase

Answer 21

When the discharge is higher