levees
Post on 26-May-2015
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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.
{http://wiki.answers.com/Q/How_is_a_levee_formed}
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