Stormwater Basins (Communities - Services Offered)

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Item ID 2771235 in Category: Communities - Services Offered

Stormwater Basins


A stormwater basin is a large water body that receives runoff from streets and parking lots. The basin slows (attenuates) the flow of storm water and sometimes treats it by reducing sediments or phosphorous from runoff. The basin is a part of a larger system of land development practices, including stream restoration and other landscape measures.

The design of the basin is influenced by the hydrology of the site, including pre-development and post-development conditions, to achieve the desired goals of storm water management. The basin must be large enough to retain a reasonable percentage of the increase in impervious surface from development. If a larger basin is not feasible on a site, then other design practices might be used.

For example, rain gardens that capture and infiltrate storm water runoff might be used instead of a basin. The location of a basin can be influenced by existing topography, or it might need to be built in close proximity to nuisance flooding areas that occur frequently on the site.

Basins can be designed to function as wetlands and provide significant benefits of wetlands such as habitat for wildlife, flood control and soil stabilization. They can also be designed for use as recreational spaces.

The design of the plantings in and around a basin can be a complex process, often involving a team of professionals. Careful planning begins with a scaled drawing of the site, and accurate measurements are important to ensure a healthy and successful planting.

The Benefits of Stormwater Basins

Stormwater Drainage
A stormwater basin, also referred to as a wet detention pond or an infiltration pond, is a man-made area of graded earth that’s designed to manage stormwater runoff. Unlike natural ponds that hold water continuously, a stormwater basin typically holds the water temporarily after a rain event and then empties it out at a controlled rate to avoid flooding and erosion. These ponds are designed to protect against flood damage, serve as an artificial wetland and improve the water quality of adjacent bodies of water.

As urbanization increases, stormwater runoff can overwhelm city sewer systems and cause significant erosion and flooding on downstream properties. The use of traditional drainage methods such as basins has been successful at reducing flood peak flows, but the practice often increases soil infiltration and stream erosion rates. These conventional techniques have limited water quality treatment and often require a large area of valuable land that could be used for development.

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Last Update : 04 December 2023 9:53 AM
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Item  Owner  : Drainageteam
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2024-05-08 (0.391 sec)