For the channel of Prob. FE10.1, if the water depth is 2 m and the uniform flow rate is 24 m3/s, what is the approximate value of Manning's roughness factor n?
(a) 0.015, (b) 0.020, (c) 0.025, (d) 0.030, (e) 0.035
Consider a rectangular channel 3 m wide laid on a 1° slope. If the water depth is 2 m, the hydraulic radius is 0.86 m.