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Zoe Leek 12RSG Geography HD




Potholes

Potholes are cylindrical holes drilled
into the rocky bed of a river by
turbulent high velocity water loaded
with pebbles. The pebbles become
trapped in slight hollows and
vertical eddies in the water are
strong enough to allow the
sediment to grind a hole…

Page 2

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Zoe Leek 12RSG Geography HD




The rejuvenation of the area, giving the river renewed erosional power as sea level falls.

The river falls over a rock edge into a deep plunge pool at the foot of the fall, where the layers of
weak rock are excavated more quickly than the…

Page 3

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Zoe Leek 12RSG Geography HD




to have alternating bars of sediment on their beds and the moving water is forced to weave
around these bars. This creates alternating shallow sections (riffles) and deeper sections (pools).
The swing of the flow that has been induced by the riffles directs the maximum…

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Zoe Leek 12RSG Geography HD




The sediment load of the river is very large, as in the Mississippi and Nile rivers.
The coastal area into which the river empties its load has a small tidal range and weak
currents. This means that there is limited wave action and, therefore, little…

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Zoe Leek 12RSG Geography HD




Floodplains



Floodplains are created as a result of both
erosion and deposition, although the
accumulation of river deposits suggests
that they are predominantly depositional
features. They are the relatively flat areas
of land either side of the river, which form
the valley floor in the…

Page 6

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Zoe Leek 12RSG Geography HD

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