There are additional requirements for forebays, inlet and outlet structures, side slopes, maintenance practices, and other criteria spelled out in the rules and guidance material for wet ponds. DEM has provided charts and other design information to assist in the design of wet detention ponds. In a similar manner, DEM has developed a guidance document that outlines design considerations for a number of potential alternative stormwater practices. For this reason, there will be situations where a combination or system of stormwater management practices may be necessary. The table below indicates the assumed TSS removal efficiencies for specific practices if designed according to DEM specifications.
Most people are familiar with wet detention ponds as a type of stormwater management measure.
Wet ponds are designed to maintain a permanent pool of water that is designed for a target TSS removal according to the size and imperviousness of the drainage area. The use of wet ponds may be limited on very small sites and by other site constraints. In general, however, wet ponds are applicable to the majority of sites requiring stormwater management. Stormwater Wetlands Areas Stormwater wetlands are constructed systems not natural wetland areas. These systems function similarly to natural wetlands by removing pollutants through settling and vegetative uptake while also reducing stormwater flows.