A natural levee is formed when a river floods over the bank and deposits sediment and this causes the banks to be higher than the flood plain.
A manmade levee is formed by piling dirt and rocks, wider at the base and tapering to the top.
When a river carrying sediment overflows it's banks the coarsest sediment is dropped first as the river no longer has the energy to carry it. The coarse material forms a small natural embankment (levee) along the edge of the river channel. The finer material is carried further away from the river channel across the floodplain and is deposited here. Over time if flooding occurs regularly the levees will become naturally higher. In times of low discharge (very dry weather/droughts) within the river channel deposition will occur causing the river bed level to rise making the river more likely to flood. Levees can be artificially strengthend and heightened to help prevent the flooding of the floodplain. The deposition of the sediment from the river means the land of the floodplain is very fertile and so many try to reclaim it for farming etc which is why the levees may be strengthened and heightened. Hope this helps anyone looking for a more simple explaination for the formation of levees (:
The area behind the levee is characteristically poorly drained for the obvious reason that water can not flow up the levee and into the river. Marshes called backswamps result. A tributary stream can not enter the river because levees block the way. Often it has to flow parallel to the river until it can breach the levee, These are called yazoo tributaries.
I drove my Chevy to the levee, but the levee was dry...
What is a sentence for levee
anti-levee
I drove my Chevy to the levee, but the levee was dry.
Kurt Levee's birth name is Christophe Kurt Levee.
Lorin Levee died in 2012.
Yes, levee is a word. A levee is an embankment against river floods. Hope I helped! :)
A levee holds back water.
Lords of the Levee was created in 1943.
Levee Town was created in 2000.
Newport on the Levee is an entertainment and shopping complex located in Newport, Kentucky. The complete physical address for Newport on the Levee is 1 Levee Way, Newport, KY 41071.