transportation and deposition
- Created by: Maiaerin
- Created on: 10-06-18 14:41
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- transportation and deposition
- eroded material is moved by rivers and the sea
- Traction: large particle like boulders are pushed along the river bed or sea floor by the force of the water.
- saltation: pebble-sized particles are bounced along the river bed or sea floor by the force of the water.
- suspension: small particles like silt and clay are carried along by the water.
- solution: soluble materials dissolve in the water and are carried along.
- deposition is the dropping of material
- costal deposition: waves that deposit more material than they erode are called constructive waves
- constructive waves have a low frequency (6-8 waves per minute).
- they are low and long
- the swash (the movement of water up the beach) is powerful and it carries materials up the coast
- the backwash (the movement of water down the beach) is weaker and doesn't take a lot of material back down the coast.
- this means there's lots of deposition and very little erosion.
- costal deposition: the amount of material that is deposited on an area of coast is increased when:
- there's lots of erosion elsewhere on the coast, so there's lots of materials available.
- there's lots of transportation of material into the area
- river deposition: there are a few reasons why rivers slow down and deposit material. deposition in rivers occur when:
- the volume of water in the river falls
- the amount of eroded material in the water increase
- the water is shallower , e.g. on the inside of a bend
- the river reaches the sea or a lake at it's mouth
- costal deposition: waves that deposit more material than they erode are called constructive waves
- eroded material is moved by rivers and the sea
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