Storm water detention and retention
Storm water facilities include ditches, swales, ponds, underground tanks and vaults. These facilities are designed to capture, store and slowly release storm water runoff.
Storm water facilities help prevent flooding and help protect water quality.
Engineering calculations are made to determine the volume of storm water that should be captured. The volume of storm water (usually measured in acre-feet) translates to a width, depth and length of the storm water detention or retention basin.
A detention pond will temporarily store accumulated storm water runoff and then release it downstream. The rate at which storm water drains out of a detention pond pond is influenced by the level in the receiving channel.
A retention or infiltration pond will temporarily accumulate storm water runoff and but does not release it downstream. instead the water slowlys soak into the soil.
Underground detention tanks and vaults function the same way as detention ponds do. They store storm water runoff and then slowly release it into the storm sewer system.
Underground retention tanks or pipes function the same way as retention pond do. They store the storm water runoff and then allow the water to be absorbed into the ground.