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Page 1

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The river valley

Course Gradient Valley and channel Cross profile
shape
Upper Steep V-shaped valley,
steep sides, narrow,
shallow channel
(Vertical erosion)




Middle Medium Gently sloping valley
sides, wider, deeper
channel (lateral
erosion)



Lower Gentle Very wide, almost flat
valley, very wide,
deep channel (lateral
erosion)




Erosion, transportation and deposition…

Page 2

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Deposition

This happens when the river slows down.

River slows down because:

Volume of water falls
Amount of eroded material increases
The water is shallower
River reaches mouth

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