A trapezoidal channel is to be cut through alluvial material with a grain size of 0.33 in. The channel must carry 1000 cfs and run on a general grade of 0.00 1 ft/ft. The angle of repose of the...

A trapezoidal channel is to be cut through alluvial material with a

grain size of 0.33 in. The channel must carry 1000 cfs and run on a general grade of 0.00 1 ft/ft. The angle of repose of the material is estimated to be 30°. Using the limiting value from the Shields entrainment diagram (Figure 16.25), determine the required channel width to result in a stable channel.