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The two stage drainage ditch is classified as a 'surface' sustainable drainage system, contrary to a sub-surface system. The two stage drainage ditch is a modification of the land whereby grass benches which serve as floodplains are formed within the land of the watershed of the water system, shown in the diagram to the right. [1]
In order to avoid a hydraulic jump, the slope of the spillway must be steep enough for the flow to remain supercritical. Proper spillways help with flood control, prevent erosion at the ends of terraces, outlets, and waterways, reduce runoff over drainage ditch banks and are simple to construct.
The term is also used for small ditches or canals in the swamp. [ 2 ] In the northwestern United States, coulee is defined as a large, steep-walled, trench-like trough, which also include spillways and flood channels incised into the basalt plateau.
A catchwater drain is a land drain, a ditch cut across the fall of the land, typically just above the level of low-lying, level ground such as The Fens of eastern England, where some land, tens of kilometres from the sea is at about sea level. Its purpose is to gather water draining from the higher, sloping ground before it reaches the flat ...
Concrete check dams in Austria A steel check dam A common application of check dams is in bioswales, which are artificial drainage channels that are designed to remove silt and pollution from runoff. A check dam is a small, sometimes temporary, dam constructed across a swale , drainage ditch , or waterway to counteract erosion by reducing water ...
Cuesta – Hill or ridge with a gentle slope on one side and a steep slope on the other; Cuspate foreland – Geographical features found on coastlines and lakeshores; Cut bank – Outside bank of a water channel, which is continually undergoing erosion; Dale – Low area between hills, often with a river running through it
A gully in Kharkiv oblast, Ukraine. Gullied landscape in Somalia.. A gully is a landform created by running water, mass movement, or commonly a combination of both eroding sharply into soil or other relatively erodible material, typically on a hillside or in river floodplains or terraces.
A ditch can be used for drainage, to drain water from low-lying areas, alongside roadways or fields, or to channel water from a more distant source for plant irrigation. Ditches are commonly seen around farmland , especially in areas that have required drainage, such as The Fens in eastern England and much of the Netherlands .