River Processes 1.River Processes by rgamesby |
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Saltation - the bouncing motion of larger particles along the river bed Traction - the rolling motion of sediment along the bed - normally much larger sediment. Obviously the larger sediments will only be moved during periods of high river flow.
Mass movement - these processes involve material on slopes moving down slope. They range in speed from rock falls to much slower soil creep. A land slide happened in Jesmond Dene, Newcastle, in November 2012. I took some pictures shown below; |
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Deposition - this is the laying down of sediment in the river channel or
on floodplains. This occurs when river velocities slow within the channel,
or when velocities slow over floodplains or when the river enters a sea or lake.
Larger sediments can be deposited at quite high river velocities, as
this material tends to be heavier and harder to carry. Lighter and
smaller material will be deposited at very low velocities and
transported in faster flowing rivers that have more energy. |
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Think about it Try the quizlet set below Hot Potatoes matching exercise on River processes |
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