Problem $4)(10$ points$)($Chapter $13)$

Given: The head on a rectangular weir that is $1$ meter high in a rectangular channel that is $4$ m wide is measured to be $0\mathrm{.}5$ m $.$

Find: What is the discharge, Q $,$ of water over the weir in cubic meters per second? Assume viscous effects must be considered, and the flow coefficient K is primarily a function of the relative head on the weir H$/$P$.$