Water and Wastewater Terms Beginning D

A B C D E F G H I J K L M N O P Q R S T U V W Y Z

detention time

The actual or theoretical (calculated) time required for water to fill a tank at a given flow; pass through a tank at a given flow; or remain in a settling basin, flocculating basin, rapid-mix chamber, or storage tank.

detention time [h] = basin volume [gal] / flow rate [gal/d] x 24 h/d

or

detention time [h] = basin volume [m³] / flow rate [m³ /d] x 24 h/d