A stable channel is to be designed for a discharge of Q

A stable channel is to be designed for a discharge of Q m³ /s with silt factor f as per Lacey’s method. The mean flow velocity (m/s) in the channel is obtained by

		Qf²		^{1 / 6}
		140

		Qf		^{1 / 3}
		140

		Q² f²		^{1 / 6}
		140

0.48		Q		^{1 / 3}
		f