2. Near the downstream end of a river spillway, a hydraulic jump often forms. The velocity of the channel is reduced abruptly across the jump. Using the conservation of mass and linear momentum principles, derive the following result for h2, the height downstream from the jump. The energy equation can be used to determine the amount of mechanical energy (from fluid velocity and gravitational head) lost as thermal energy (fluid enthalpy increase). Show that the mechanical energy loss rate (per unit thickness) from this hydraulic jump is: Loss = V1- + gh|1- h, V, h2 Answer hint: You can write the loss equation as: Loss = + gz )dA