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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.
As of June 2013, a total of $1.7 bill was spent on flood control, including construction of 90 detention basins and approximately 581 miles of channels and underground storm drains. To date, 51 square miles have been removed from federally identified FEMA flood zones, saving residents millions of dollars per year in flood insurance premiums.
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 .
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.
Detention basins are similar but are "dry ponds" designed to temporarily hold runoff as a flood control measure. Infiltration basins are ponds designed to percolate their contents into underlying permeable soils. Settling basins are designed to separate solids from wastewaters without provision for treatment of those solids.
Every old farm field, railroad right of way, and shopping center detention basin is chock full of the stinky trees. As Callery pear populations spread, they invade just about every ecological ...
The retention basin represents a dry basin or green basin and predominantly comprises forested areas. Under normal conditions, during low and moderate water levels, the river’s water is allowed to flow unhindered through a culvert in the dam, which has a cross-section measuring 3.80 m × 2.70 m with an inlet restriction of 1.40 m × 0.95 m).
Detention dams are common in flood prone areas for flood control. A detention dam is built at an elevation above the flood prone zone. Flood water collects in the basin above the dam and is released at a flow rate the flood zone and channel can accommodate. Channels can include dikes, canals, streams, drain pipes, and rivers.