A trapezoidal channel with a bed width of 12.5 m is constructed to transport a 24.6 m /s flow of water to a nearby commercial farm. The side slopes on both banks of the channel is 1:1. For a critical flow condition in thls channel, compute the following: 4.1 a) Actual flow depth. b) Hydraulic depth for the critical condition. c) Critical velocity. Water flows in a rectangular irrigation channel 4.0 m wide at a depth of 1.7 m. For a discharge of 15.0 m/s, 4.2 a) Determine whether the flow is subcritical, critical or supercritical. b) Calculate the alternate depth of flow that could occur in the channel at the same discharge. Determine the critical slope of the channel assuming that it is lined with concrete (n = 0.012).