Using Bernoulli equation solves this question. Water discharges over a spillway. The

depth behind the spillway is $7\mathrm{.}0$ m$,$ the spillway and downstream channel are $15$ m wide, and the depth at the toe of the spillway is $0\mathrm{.}2$ m$.$ Assume that the surface velocity behind the spillway is very small such that the velocity head can be neglected and ignore the frictional loss on the spillway face, what is the discharge over the spillway?