BMP and Detention Ponds

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Best Management Practices (BMP) and Detention Ponds

Structural Best Management Practices, also known as BMP, help control the flow of stormwater. BMP reduce downstream flooding, provide natural filtration to reduce pollutant levels, and improve the overall health of the environment. The Department of Water Resources inspects all BMP to ensure they are properly maintained.

For questions about maintenance of BMP and detention ponds, contact: DWRstormwaterBMP@GwinnettCounty.com or call 678.376.7193.

Examples of some common BMP are below.

Bioretention Area Green Infrastructure A bioretention area is a shallow stormwater basin or landscaped area with well-draining soils such as sand, fines, organic matter, and vegetation to capture and treat stormwater runoff. Learn more...

Bioslope Green Infrastructure Bioslopes are linear BMP with a permeable media that allows stormwater runoff to infiltrate and filter through the practice before exiting through an underdrain. Learn More...

Dry Detention Basin Traditional BMP A dry detention basin is a type of stormwater BMP that captures stormwater runoff temporarily to reduce downstream flooding and remove pollutants. Learn more...

Enhanced Swale Green Infrastructure An enhanced swale is a vegetated open channel designed to capture and treat stormwater runoff within dry or wet cells formed by check dams or other means. Learn more...

Gravel Wetland Green Infrastructure Gravel wetlands are similar to a regular stormwater wetland except it is filled with crushed rock or gravel and designed so that the rock or gravel is submerged. Learn more...

Oil and Grit Separator Traditional BMP Oil and grit (Gravity) separators are used to clean stormwater runoff by removing settleable solids, oil, grease, and floating debris using gravitational settling and pollutant trapping. Learn more...

Pervious Pavement Green Infrastructure Pervious pavements are a green infrastructure alternative that allows stormwater to infiltrate through the surface of the pavement to the ground below. Learn more...

Sand Filter Traditional BMP Sand filters are multi-chamber structures designed to treat stormwater runoff through filtration, using a sediment forebay, a sand bed, and typically an underdrain system. Learn more...

Stormwater Conveyance Green Infrastructure A regenerative stormwater conveyance (RSC) is a practice that provides treatment, infiltration, and conveyance to stormwater runoff through a combination of pools, riffles (cobble rocks or boulders), native vegetation, an underlying sand layer, and wood chips. Learn more...

Underground Detention Traditional BMP Detention storage located in underground tanks or vaults designed to provide water quantity control through temporary storage of stormwater runoff. They also remove heavy sediments to improve water quality. Learn more...

Vegetated Filter Strip Green Infrastructure Vegetated filter strips are uniformly graded and densely vegetated sections of land, designed to treat runoff and remove pollutants through vegetative filtering and infiltration. Learn more...

Wet Detention Basin Traditional BMP Wet detention basins are constructed shallow stormwater ponds or landscaped areas with a permanent pool of water. Learn more...

Wetlands Green Infrastructure Stormwater wetlands typically consists of open water, shallow marsh, and semi-wet areas that are located just above the permanent water surface. Learn more...

Contact Information

For questions about maintenance of BMP's and Detention Ponds, contact: DWRstormwaterBMP@GwinnettCounty.com or call 678.376.7193.

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