A rectangular channel has sluice gate which is $900mm$ open. The water depth behind the gate is $630mm.$ and after the gate it is $0\mathrm{.}212mm.$ Assume that there is no energy loss at the gate Calculate, discharge from the gate, the depth after the gate when $0\mathrm{.}700\frac{m^3}{s}$ flow rate is added resulting in the increase of the depth of water to $700mm.$ In the second condition, the gate must be slightly opened to allow more flow to pass. If the compaction coefficient is the same, find the required opening height of the gate. If there is a hydraulic jump after the gate which turns the super critical flow after the gate to a subcritical depth, find the depth of water after the hydraulic jump. How much is total energy loss in the hydraulic jump?