Sediment movement in a wide river is to be studied using a movable-bed model. The prototype bed is composed of equal portions of MS, CS, and VCS, and the river slope is 0.00027. The model bed material has a specific gravity of 1.35. Determine the required model sediment sizes, the length ratios, the water discharge per unit width ratio, and the shear stress ratio.
If the prototype slope and depth in Problem are 0.00027 and 6 ft, respectively, determine from the Shields diagram whether or not sediment transport will occur in both the model and the protoype.