For effective performance, how should a retention basin manage stormwater percolation?

A retention basin should manage stormwater percolation slowly to maximize its effectiveness in filtering and treating runoff. Slow percolation allows for adequate time for sedimentation and natural biological processes to take place within the basin. This extended interaction between the stormwater and the soil encourages the removal of pollutants and sediments, improving water quality before it eventually infiltrates into the groundwater or is released downstream.

Additionally, slow percolation helps to reduce the risk of erosion and maintains the structural integrity of the basin. Rapid percolation could lead to inadequate treatment of the water, as it may not allow enough time for contaminants to settle out. Also, it can potentially overwhelm the receiving environment by allowing untreated water to escape too quickly. Therefore, managing stormwater percolation slowly is crucial for the ecological and functional objectives of retention basins.