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 ?
Dans mon cas, la levee d'immunite est liee a une fraude electorale", a-t-elle explique dans une declaration rapportee par Jawhara Fm, assurant qu'elle ne s'y attache pas vraiment et que cela ne la derangerait pas si en effet on lui retire son immunite.
A recovery district spokesman noted the turnout was much higher than at public meetings held last year before the recovery district had proposed a specific plan, noting the levee system is "not very popular.
Le ministre a ajoute, dans le meme contexte, que la levee de la subvention dans le secteur industriel va procurer pres de 650 millions de dinars aux caisses de l'Etat.
La phase polyurique dure environ 48 heures apres la levee de l'obstacle.
Frost allegedly dumped debris from a recently destroyed building on the levee, excavated dirt from the landside of the levee and covered the debris.
Maintenance on the levee was abandoned years ago after a higher levee was built farther back, leaving a sliver of farmland in between vulnerable.
As part of this process, FEMA requested data and documentation from communities who are responsible for maintaining levee systems.
Over the years, the Lieutenant Governor's New Year's Levee drew an ever-increasing number of citizens until eventually the crowd could no longer be accommodated in Government House.
Loudpixel has used Levee internally with its own clients for eight months; the team will be launching the tool to selected partners in September.
Lamon said the first phase, which will go out for bids next week, involves putting slurry walls in the levee from 24th Street near Marysville High School to Jack Slough Road.
Since Katrina, many people have discussed the levee failures, but most do not understand why the levees failed and that they could not have protected New Orleans.
Intersect technology would minimize downhole pressures, reducing the risk for a levee breach.