The specific operational design feature that allows detention basins to effectively reduce peak flood flows downstream is the restricted outlet structure. This structure, engineered into the basin's design, is a controlled opening—such as a small culvert, an orifice, or a weir—that purposefully limits the rate at which water can discharge from the basin. During a rainfall event, stormwater runoff, which is water flowing over land, rapidly enters the detention basin. The inflow....
Log in to view the answer
