A reservoir discharges into a long trapezoidal channel with a bottom width of 20 feet, 3 to 1 side slopes, a bottom slope 0.001 and a roughness coefficient of 0.025 the reservoir surface is 10 feet above the invert at the channel entrance for channel transition loss coefficients. Determine the flow rate and the normal depth in the channel KL = 0.2; ANSWERS : Yn = 9.34, Q = 2678 cfs