A trapezoidal channel of 8 ft bed width and 1 : 1 side slope carries a discharge of 300.0 /s. The channel consists of two reaches with a bed slope of 0.0004 ft/ft and 0.03 ft/ft, respectively as...

A trapezoidal channel of 8 ft bed width and 1 : 1 side slope carries a discharge of 300.0

/s. The channel consists of two reaches with a bed slope of 0.0004 ft/ft and 0.03 ft/ft, respectively as shown in Figure P14.24. A gate is located in the middle of the second reach to elevate the water level at its upstream. Determine the critical and normal depths and sketch the water surface profile. Let n = 0.03.