qp = peak Flow, m3/s (ft3/s) Ak = drainage area, km2 (mi2) QD = volume of direct runoff ( = 1 for unit hydrograph), mm (in) tp = time to peak, hr Ku = 2.083 (483.5 in English units)
qp = peak Flow, m3/s (ft3/s)Ak = drainage area, km2 (mi2)QD = volume of direct runoff ( = 1 for unit hydrograph), mm (in)tp = time to peak, hrKu = 2.083 (483.5 in English units)