levee


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Related to levee: Hurricane Katrina, natural levee

levee

(lĕv`ē) [Fr.,=raised], embankment built along a river to prevent flooding by high water. Levees are the oldest and the most extensively used method of floodflood,
inundation of land by the rise and overflow of a body of water. Floods occur most commonly when water from heavy rainfall, from melting ice and snow, or from a combination of these exceeds the carrying capacity of the river system, lake, or the like into which it runs.
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 control. They are constructed by piling earth on a surface that has been cleared of vegetation and leveled. From a broad base the levee narrows to a flat crown, on which sandbags or some other temporary protection may be placed to contain unusually high waters. Levee surfaces are commonly protected from erosion by vegetation, notably Bermuda grass. A banquette, or low terrace of earth, is usually added on the land side of high levees to prevent loss of material from the slope through rain erosion. On the river side, plantings of willows, weighted brush matting, or concrete revetments protect those sections of levee that are exposed to strong waves or currents, while ditches or drainage tiles keep the foundation from becoming waterlogged. Levee systems require careful planning, with sections set back from the river to form a wider channel and with flood valley basins divided by cross levees to prevent inundation of large areas by a single break. The most extensive levee systems in the United States are along the Mississippi and Sacramento rivers and their tributaries. The dikes of Holland are a form of levee, and levee-type embankments are used along the Danube, Vistula, Po, and other European rivers.

Levee

 

a hydraulic regulating structure, usually a low earthen dam, designed to protect riparian land from inundation during seasonal or flash flooding of rivers. Levees are built chiefly on the floodplains of rivers. They receive the pressure of the water only periodically, when the level rises above the banks.

levee

[′lev·ē]
(civil engineering)
A dike for confining a stream.
A pier along a river.
(geology)
An embankment bordering one or both sides of a sea channel or the low-gradient seaward part of a canyon or valley.
A low ridge sometimes deposited by a stream on its sides.

levee

1 US
an embankment alongside a river, produced naturally by sedimentation or constructed by man to prevent flooding

levee

2
1. a formal reception held by a sovereign just after rising from bed
2. (in Britain) a public court reception for men, held in the early afternoon
References in periodicals archive ?
The "high level" option consisted simply of raising all of the existing levees and, where necessary, constructing new levees to a height that would prevent flooding that could result from the standard project hurricane (SPH), a hypothetical hurricane that was used to guide Corps levee design and that loosely represented the most extreme hurricane that would be expected to hit New Orleans every 200 to 300 years.
Asked whether the Levee Task Force would take into consideration scientific consensus on the changing climate, Hutchinson, speaking in an interview in his office, said: "I certainly want the Task Force to follow science."
The last time a cut was made in the levee was the historic flood of 1993.
De son cote, le president de la Commission du reglement interieur, de l'Immunite, des lois parlementaires et des lois electorales, Chaker Ayadi, a rappele qu'au cours de la presente session parlementaire, quatre demandes de levee de l'immunite ont ete formulees dont trois concernent un meme depute.
The water seemed to be everywhere, but it left the older disused levee dry above the flood.
The bulk of the funding - nearly $4 billion - will go toward the construction of nearly 27 miles of coastal levees in southern Orange County and to shore up nearly 30 miles of existing coastal levees in Port Arthur and Freeport.
The bulk of the funding -- nearly $4 billion -- will go toward the construction of nearly 27 miles of coastal levees in southern Orange County and to shore up nearly 30 miles of existing coastal levees in Port Arthur and Freeport.
Par ailleurs, les banques d'affaires ont desormais un vivier identifie de 58 entreprises, sur lequel ils peuvent travailler et imaginer des idees de deals dont ceux relatifs a la levee de dette ou a la cotation.
As part of the ongoing Sacramento River Bank Protection Project, the work will repair river bank erosion and protect levees along the Sacramento River and its tributaries to reduce flood risk for the Central.
La levee de l'integralite des sanctions sera echelonnee sur dix ans, et durant 15 ans les mesures pourront etre automatiquement retablies en cas de manquements de l'Iran.
The bad management was embodied in the long stretches of levees flanking the river.
Remote sensing of the Mississippi River levee came about as a collaborative effort between many federal and state government agencies.