What is the primary purpose of a retention basin?

The primary purpose of a retention basin is to retain stormwater on site. Retention basins are designed to capture and store excess rainwater, allowing for gradual release or infiltration into the ground. This helps manage stormwater runoff effectively by reducing peak flow rates and minimizing the risk of flooding. By keeping stormwater on site, retention basins also provide opportunities for groundwater recharge and improve water quality by allowing sediments and pollutants to settle out before the water is released or infiltrated. This function is critical for maintaining the hydrology of the area and protecting aquatic ecosystems downstream.