How long should storage volume be recovered in a retention basin?

The recommended recovery time for storage volume in a retention basin is generally set at 72 hours. This duration is important for the effective functioning of the retention basin in managing stormwater runoff. A 72-hour recovery period allows for adequate drainage of the stored water, ensuring it returns to the natural or designed hydrological cycle effectively.

This time frame helps to prevent issues such as mosquito breeding and water quality degradation. Properly managed retention basins are designed to hold water for a sufficient period, allowing sedimentation and biological processes to improve water quality before it is released back into the environment. Additionally, a 72-hour recovery ensures that the basin can handle subsequent storm events without becoming overwhelmed or losing retention capacity.

Overall, this time frame supports both water quality management and flood control, balancing ecological needs with engineering requirements, which are critical in stormwater management practices.