unit:M3-PER-SEC
A cubic metre per second ($m^{3}s^{-1}, m^{3}/s$), cumecs or cubic meter per second in American English) is a derived SI unit of flow rate equal to that of a stere or cube with sides of one metre ( u0303 39.37 in) in length exchanged or moving each second. It is popularly used for water flow, especially in rivers and streams, and fractions for HVAC values measuring air flow.