A rectangular channel $5\mathrm{.}0m$ wide carries a specific discharge of $4\mathrm{.}0\frac{m^2}{s}.$ A hydraulic jump is fixed in a certain position by placing concrete blocks at the base of the spillway. The initial depth of the jump is $0\mathrm{.}5m.$ Determine the force acting on the blocks if the depth of water after the jump is $2\mathrm{.}0m.$ In case that the concrete blocks are removed, what will be the new water depth?