Question

an water vertical sluis gate freely 56 m3/s into a rectangular channel 7 m wide . the gate whic is the same width as the channel is set at a height of 1.4m above the bed and the depth at the vena contracta is .85 m the energy loss in the converging flow at a sluis is quite small so take the head loss B as .05v2 / 2g the normal depth in the downstream hz=2.6m

1. calculate the depth US of the gate take the energy coefficient as 1.05

2. confirm that the gate is able to discharge freely does a hydroulic jump occuar downstream at the gate if so where

3. use the momentum equation to evaluate the force on the gate ( assume the momentum coefficint B=1

using Army crob method

Answer 1

ANSWER:---------