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The side of a levee in Sacramento, California. A levee (/ ˈ l ɛ v i / or / ˈ l ɛ v eɪ /), [a] [1] dike (American English), dyke (British English; see spelling differences), embankment, floodbank, or stop bank is an elevated ridge, natural or artificial, alongside the banks of a river, often intended to protect against flooding of the area adjoining the river.
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The slope of a levee is primarily a function of its grain size. [4] Levees tend to be steeper when they first form and are close to the channel, then gradually level out as they grow and their grain size decreases. [6] In the stratigraphic record, natural-levee deposits typically consist of thinly-layered sandstones overlying mud- to clay-sized ...
The U.S. levee system is a massive — and, often, not fully understood — piece of infrastructure. What was considered adequate protection when levees were originally built can't withstand wet ...
California Reclamation Districts are legal subdivisions within California's Central Valley that are responsible for managing and maintaining the levees, fresh water channels, or sloughs (pronounced slü), [1] canals, pumps, and other flood protection structures in the area. Each is run autonomously and is run by an elected board and funded with ...
The most up-to-date description and discussion of the Delta levee system can be found in the Economic Sustainability Plan of the Delta Protection Commission. [40] This study concluded that the Delta levee system is now relatively robust but should be improved to effectively eliminate the risk of failure in extreme floods and earthquakes.
Floodgates, also called stop gates, are adjustable gates used to control water flow in flood barriers, reservoir, river, stream, or levee systems. They may be designed to set spillway crest heights in dams, to adjust flow rates in sluices and canals, or they may be designed to stop water flow entirely as part of a levee or storm surge system.
March of 2019 was just the start of what will be a years-long struggle to repair and rebuild livelihoods along major Midwest river systems. A massive storm drove river levels higher and higher in ...