1. Compute the flow rate for the channel shown below if the widths for A1, A2, and A3 are 30 m, 8 m and 44 m with depths of 0.8 m, 3.0 m and 1.5 m. Assume So =0.0018, n1 = n3 0.035, and n2 = 0.022.

Fig: 1

Fig: 2