Water cascade analysis (WCA) is a technique to calculate the minimum flowrate target for feedwater and wastewater for continuous water-using processes.
WCA was first introduced by Manan, Tan and Foo in 2004.
[2] Since then, it has been widely used as a tool for water conservation in industrial process plants.
A Time dependent water cascade analysis was presented later on.
[3] A variation of the WCA is the gas cascade analysis (GCA).