No doubt you used the horizontal-jump formula (10.43) to solve Probs. 10.89 and 10.90, which is reasonable since the slope is so small. However, Chow [ref. 3, p. 425] points out those hydraulic jumps are higher on sloped channels, due to €œthe weight of the fluid in the jump.€ Make a control-volume sketch of a sloping jump to show why this is so. The sloped-jump chart given in Chow€™s figure 15-20 may be approximated by the following curve fit: Where 0 (≤20) versus Fr1 (≤15) for various S0 (≤0.3)

3.5So V1 V2 So