Dry Detention Pond

Dry detention ponds only hold water during storms and often double as neighborhood parks. They are used primarily to contain water for short periods of time -- usually no more than 48 hours -- and to prevent flooding by slowing the water's flow and allowing it to spread out over a wider area and to drain out slowly.

Dry detention ponds are either planted with turf grass or with native vegetation similar to that found in wetlands. Native vegetation, with its deeper root systems, is highly effective for filtering out pollutants and capturing sediment. This dual action improves water quality. Native vegetation also absorbs more water than turf grass.