A trapezoidal channel of 2.5 m bed width and l: 1 side slope consists of three long reaches with a gate located between the first and second reaches as shown in Figure P XXXXXXXXXXThe bed slopes for...

A trapezoidal channel of 2.5 m bed width and l: 1 side slope consists of three long reaches with a gate located between the first and second reaches as shown in Figure P 14.30. The bed slopes for the three reaches are 0.0045, 0.00008, and 0.009, respectively. The bed slope of the first reach is equal to the critical slope and the Chezy roughness coefficient, C, is 45 (metric). Find the discharge and draw the water surface profile knowing that the depth of flow at the point of change in the bed slope between the second and third reaches is O .9 m.