What is the purpose of a sediment/retention pond?

The primary purpose of a sediment or retention pond is to manage stormwater runoff. These ponds are designed to temporarily store rainwater and surface runoff, which helps to reduce flooding and control the rate at which water flows into natural waterways. By capturing runoff, retention ponds allow sediment and pollutants to settle out, thus improving water quality before it is released into surrounding environments. This management technique is particularly important in urban and developed areas, where impervious surfaces increase the amount and speed of stormwater runoff, potentially leading to erosion and pollution in nearby streams and rivers.

While sediment ponds can provide some habitat for wildlife and may have positive impacts on air quality indirectly, their primary function is focused on hydrology and stormwater management.