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Detention ponds that are designed to permanently retain some volume of water at all times are called retention basins. In its basic form, a detention basin is used to manage water quantity while having a limited effectiveness in protecting water quality, unless it includes a permanent pool feature. [1]
A retention basin, sometimes called a retention pond, wet detention basin, or storm water management pond (SWMP), is an artificial pond with vegetation around the perimeter and a permanent pool of water in its design.
A stormwater detention vault is an underground structure designed to manage excess stormwater runoff on a developed site, often in an urban setting. This type of best management practice may be selected when there is insufficient space on the site to infiltrate the runoff or build a surface facility such as a detention basin or retention basin. [1]
It is distinguished from a detention basin, sometimes called a dry pond, which is designed to discharge to a downstream water body (although it may incidentally infiltrate some of its volume to groundwater); and from a retention basin, which is designed to include a permanent pool of water.
Retention basins are used to manage stormwater runoff to prevent flooding and downstream erosion, and improve water quality in an adjacent river, stream, lake or bay. Detention basins are similar but are "dry ponds" designed to temporarily hold runoff as a flood control measure.
On some construction projects, the sediment basin is cleaned out after the soil disturbance (earth-moving) phase of the project, and modified to function as a permanent stormwater management system for the completed site, either as a detention basin or a retention basin. [2]
S is the storage through either retention or detention areas; is the initial abstraction, which is the short-term surface storage such as puddles or even possibly detention ponds depending on size; R is surface runoff.
Retention basin, stormwater runoff to prevent flooding and downstream erosion which includes a permanent pool of water; Detention basin, a man-made basin used to temporarily store surplus water from rivers. Sedimentary basin (sedimentology), a low and usually sinking region that is filled with sediments from adjacent higher areas