What is the function of a retention pond in stormwater management?

The primary function of a retention pond in stormwater management is to hold stormwater for gradual release and reduce flooding. Retention ponds are designed to collect runoff from rain and snowmelt, allowing the water to gradually percolate into the ground or evaporate over time. This controlled release helps to manage the flow of stormwater, preventing overwhelming volumes from entering drainage systems all at once and thereby reducing the risk of flooding in surrounding areas.

By temporarily storing stormwater, retention ponds also aid in maintaining the natural hydrological cycle, allow for sedimentation to occur, and can improve water quality by settling out pollutants before the water is released or infiltrated into the groundwater.

While retention ponds can occasionally provide recreational opportunities or serve other functions, their primary goal is centered around managing stormwater to mitigate flooding and protect the environment.