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A detention basin or retarding basin is an excavated area installed on, or adjacent to, tributaries of rivers, streams, lakes or bays to protect against flooding and, in some cases, downstream erosion by storing water for a limited period of time.
Apr 30, 2015 · A detention, or dry, pond has an orifice level at the bottom of the basin and does not have a permanent pool of water. All the water runs out between storms and it usually remains dry. A retention basin or pond has a riser and orifice at a higher point and therefore retains a permanent pool of water.
Detention basins are surface storage basins or facilities that provide flow control through attenuation of stormwater runoff. They also facilitate some settling of particulate pollutants. However, basins can also be mixed, including both a permanently wet area for wildlife or treatment of the runoff and an area that is usually dry to cater for ...
May 28, 2009 · A detention, or dry, basin has an orifice level with the bottom of the basin so that all of the water eventually drains out and it remains dry between storms – hence, a dry basin. Retention basins have a riser with an orifice at a higher point so that it retains a permanent pool of water.
Detention Basins are bermed or excavated areas designed to temporarily detain runoff to allow sediment and particulates to settle out prior to runoff being discharged. Detention Basins treat runoff through sedimentation and infiltration when the basin is unlined. A Detention Basin may also be known as a detention pond.
Detention basins can be used to attenuate and treat surface water runoff from roads or other impermeable surfaces. They are designed for areas in which storm runoff needs to be contained for a period of time to allow solids to settle and for downstream peak flow to be reduced.
Retention basins are permanent bodies of water built to hold (or retain) floodwater and local runoff during a flood, and then release it through an outlet system when flooding has subsided. They may store a few acre-feet to millions of acre-feet of water.
