Formation of a Levée

I missed out a vital part of the rivers topic in my Geography notes, and thought it warranted its own file. The formation of levées always comes up in exams, and it's key that you know it!

Equally, I did not put in the formation of a waterfall. However, I find it easier to use this diagram to revise from for learning that. If you just expand on these points, you'll get full marks.

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  • Created by: Jackarias
  • Created on: 14-05-09 08:58
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Formation of a Levée
Definition: Levées are natural embankments of silt along the banks of a
river, often several metres higher than the floodplain.
The river is on its floodplain with a very low gradient.
The river is mainly depositing (silt and sand).
When the river floods a lot of silt is deposited on the riverbanks and
much less on the floodplain.
Frequent flooding continues this build-up.
When the river is flowing, normally it deposits in the riverbed.
This raises the river above the floodplain.
But usually, the built-up levées protect the plain from flooding.


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