Determine the critical depth and the critical velocity for the Colorado River System Aqued...

Determine the critical depth and the critical velocity for the Colorado River System Aqueduct (Problem ) if Q = 1500 cfs.

Problem

The Colorado River System Aqueduct has the cross section shown in Figure. When the water in the aqueduct is 10.2 ft deep, flow is measured as 1600 cfs. If n = 0.014, what is S0 in (a) ft/ft and (b) ft/mi?

Figure