HYDRAULIC JUMPS AT POSITIVE AND NEGATIVE STEPS ON SLOPING FLOORS

A prediction model for computing the sequent depth ratio of the hydrau lic jumps formed in sloping rectangular channel with positive or negat ive step has been developed. It is based on the application of the one dimensional momentum and continuity equations. The presented model co ntains two defined parameters. One of them to account for the effect o f the channel slope and the second for the presence of the positive or negative step. The model can predict the solely and the combined effe cts of the bed slope and the step on the sequent depth ratio of the hy draulic jumps. Large series of experimental data have been used to cal ibrate and verify the developed model for both sloping as well as hori zontal floors. The predictions agreed reasonably well with theoretical and experimental results of other authors.