Detention basin
орчны урсац хуримтлуулах хиймэл усан сан
водохранилище местного стока
Detention basins are normally dry, but are designed to detain surface water temporarily during, and immediately after a runoff event. Their primary function is to attenuate the storm flows by releasing flows at a lower flow rate. There are no gates or valves allowed on the outlet so that water can never be stored on a long-term basis. Typical detention times in such a basin would be on the order of 24 to 72 hours although some are as long as 5 to 10 days.
Source http://www.nws.noaa.gov/om/hod/SHManual/SHMan014_glossary.htmDetention basin
үерийн усан сан
противопаводочное водохранилище
A detention basin or retarding basin is an excavated area installed on, or adjacent to, tributaries of rivers, streams, lakes or bays to protect against flooding and, in some cases, downstream erosion by storing water for a limited period of time.
Source https://en.wikipedia.org/wiki/Detention_basinhttps://en.wikipedia.org/wiki/Detention_basin#/media/File:Dry_pond.jpg