Flow
Control Devices – These include detention/retention
ponds, constructed wetlands, dams and check dams and rain barrels.
Ponds and wetlands also provide some biological treatment of polluted
water, as well as habitat for fish and wildlife. |
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 Stormwater Pond |
Stone Check Dams in Swale |
Constructed Wetland |
Filtration
Devices – These include bio-filters, grassy swales,
sand filters, catch basin inserts, manufactured bags and booms or
skimmers. They remove particulates and associated pollutants such
as heavy metals and phosphorous. |
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 Sand Filters |
 Skimmer in Pond |
Installing a Catch Basin Insert Filter |
Infiltration
Devices – These include underground stormwater storage
vaults, underdrains, bio-retention areas, porous pavement, dry wells,
dry swales, infiltration basins and infiltration trenches. They
allow stormwater to return to the ground, rather than simply run
off impervious surfaces. |
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 Dry Pond |
 Porous Pavers |
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Hydrodynamic
Devices – These are special structures that concentrate
and remove sediment, litter and other floatable solids, and oil.
They include proprietary devices such as BaySaver®, Stormceptor®,
and Aquaswirl®. |
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 BaySaver ® |
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| Erosion Control Devices – These include silt fences, erosion blankets, vegetative covers, riprap (stone) coverings or barriers, mulches, and sandbag dikes. Detention practices that slow the peak flow of stormwater also serve to decrease erosion in stream channels. | ||
Silt Fence |
Pyramat Erosion Blanket |
 Silt Fence and Riprap |