Levees

Mwai Nyamu

Levees

• A levee is a naturally occurring ridge at the banks of a river.

• It is like a raised river bank above the level of the floodplain.

Formation of a levee• When a flood occurs, the river

bursts its banks.• The flood leaves behind sediment

(thickest at channel edges, thin and fine on the outer part of the floodplain outside the channel)

• This sediment raises the level of the banks above the floodplain.

• If more flooding occurs then the levees keep getting higher.

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