Erosional and Depositional River Landing

Question 1

Define meander

Answer 1

A bend in the river

Question 2

At what course do rivers develop meanders?

Answer 2

Middle and lower course

Question 3

Where occurs on the outside bend?

Answer 3

Erosion

Question 4

Where occurs on the inside bend?

Answer 4

Deposition

Question 5

Where is the current slower and why?

Answer 5

Inside bend as the river channel is shallower meaning there is more friction to slow the water down and there is a smaller flow of water so it has less energy. It causes deposition to occur on the inside bend

Question 6

Where is the current faster and why?

Answer 6

Outside Bend as the river channel is deeper so there is less friction, as well as a larger flow of water to slow down the water. Therefore the current has more energy. It causes erosion on the outside bend

Question 7

Define current

Answer 7

Flow of the river

Question 8

Why happens when heavy erosion takes place on the outside bend?

Answer 8

River cliffs can form

Question 9

When happens when depositing on the inside bend takes place?

Answer 9

Slip - off slopes form

Question 10

What happens when you down a river meander sequence?

Answer 10

As you

Question 11

What is a slip off slope?

Answer 11

A deposition of sediment

Question 12

Define helicoildal flow

Answer 12

The flow of water in a horizontal direction in a corkscrew-like direction. It transfer more material from the river cliff of one meander to the slip-off slope to the next. It is another cause of deposition.

Question 13

Cause of deposition

Answer 13

Helicoildal flow and slow water current on inside bend

Question 14

Cause of erosion

Answer 14

Fast current on outside bend.

Question 15

Define riffles

Answer 15

They are areas of shallow water created by deposition of materials like rocks. They are found on the inside bend

Question 16

Define pools

Answer 16

Areas of deep water, where there is greater erosion. They are found on the outside bend

Question 17

Define ox-bow lake

Answer 17

U - shaped lake formed when two meanders join together

Question 18

Describe the formation of an ox-bow lake

Answer 18

1. ) Erosion causes the outside bends of a river to get closer
2. ) Eventually there is only a small bit of land left between the bend. It is called a neck
3. ) Usually in a flood there is heavy erosion and the river breaks through
4. ) The river flows along its shortest course
5. ) An ox bow lake forms and deposition on the inside bend eventually cuts of the meander.