$3\mathrm{.}3$ A composite gutter section has the dimensions $W=0\mathrm{.}5m,SL=0\mathrm{.}008,S,=$

$0\mathrm{.}02,$ and $a=0\mathrm{.}05m.$ The Manning roughness factor is $n=0\mathrm{.}016.$ Determine

the discharge in the gutter at a spread T of $2\mathrm{.}0m.$

QUESTION $4$

Determine the critical depth and the accompanying specific energy for a discharge

rate of $10\mathrm{.}5\frac{m^3}{s}$ in a rectangular channel with a width $(B)=4\mathrm{.}0m,$ and a triangle

channel with $m=1\mathrm{.}5.$