15. A 30-meter wide rectangular channel conveys flow at 18.89 meters per second. The height of the spillway is 85 meters. The upstream depth of flow is 7.5 meters. Calculate the depth of flow prior to the hydraulic jump (6 points), after the hydraulic jump (4 points), the headloss (4 points) and the percent energy dissipated (6 points) by the hydraulic jump that is formed downstream of the spillway.

Fig: 1