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Modern zoned-earth embankments employ filter and drain zones to collect and remove seep water and preserve the integrity of the downstream shell zone. An outdated method of zoned earth dam construction used a hydraulic fill to produce a watertight core. Rolled-earth dams may also employ a watertight facing or core in the manner of a rock-fill dam.
Under the system, channels (pynes) [2] are dug into the soil - allowing for water to flow - with raised embankments on the sides. The channel is interspersed with small retention ponds (ahars), [2] useful for collecting excess water. The design of the system serves a dual purpose, draining water during floods and retaining water during droughts.
The function of the field drainage system is to control the water table, whereas the function of the main drainage system is to collect, transport, and dispose of the water through an outfall or outlet. In some instances one makes an additional distinction between collector and main drainage systems.
Storm water is typically channeled to a retention basin through a system of street and/or parking lot storm drains, and a network of drain channels or underground pipes.. The basins are designed to allow relatively large flows of water to enter, but discharges to receiving waters are limited by outlet structures that function only during very large storm eve
Cattle grazing below high water, Isle of Dogs, 1792 (Robert Dodd, detail: National Maritime Museum) The Embanking of the tidal Thames is the historical process by which the lower River Thames, at one time a shallow waterway, perhaps five times broader than today, winding through malarious marshlands, has been transformed by human intervention into a deep, narrow tidal canal flowing between ...
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.
"1923" will have its network premiere on Dec. 8 at 9 p.m. ET/PT and 8 p.m. CT on the Paramount Network.. The show will debut right after a new episode of "Yellowstone" Season 5, which airs at 8 p ...
A levee, an artificial bank raised above the immediately surrounding land to redirect or prevent flooding by a river, lake or sea; Embankment (earthworks), a raised bank to carry a road, railway, or canal across a low-lying or wet area