Experimental Studies on Hydraulic Jumps over Corrugated Beds

A study of the effect of right-angled triangle and stepped rectangular shapes of corrugated beds on the characteristics of hydraulic jump is conducted. Experiments are performed for a range of the supercritical Froude numbers from 4.7 to 7.4. Two shapes of corrugations (right angled triangle and stepped rectangular) of the amplitude to wave length ratio of 0.6 are considered in the present study. It is found that, for two shapes of corrugated beds, the tail water depth required to form a jump is appreciably smaller than that for the corresponding jumps on smooth beds. The results of this study show the efficacy of corrugated beds for energy dissipation downstream hydraulic structures.