Erosion, Transportation and Deposition, Geography

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Erosion Processes

Hydraulic Action:
Where the sheer force of the water erodes the stones bed and banks of the river.

Corrasion/Abraision:
Where stones in transport are thrown into the bed and banks, eroding them.

Corrosion/solution:
Where weak acids within the water react with the rocks and bed of the river.

Attrition:
Where stones in transport are thrown into one another.

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Transportation Processes

Solution:
Minerals are dissolved in water and carried along in solution.

Suspension:
Fine light material is carried along in water (suspended).

Saltation:
Small pebbles and stones bounce along the river bed.

Traction:
Large boulders or rocks are rolled along the river bed.

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Deposition

When a river loses energy, it will drop or deposit some of the material it's carrying,

Deposition may take place when a river enters and area of shallow water or when the volume of water decreases, for example after a flood or during times of drought. It can also occur where wetted perimeter increases relative to the cross sectional area.

Flocculation can also occur- this is where clay particles bond together, I creasing their mass and therefore sink to the river or sea bed.

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