Problem $2$:

Find the normal depth for a $24$ inches pipe when the discharge is $65\%$ of the pipe capacity.

The pipe has $2\%$ grade. Use Manning's $n=0\mathrm{.}012.$ Show your solution using partial flow

to full flow ratio curve on Slide #$19$ on Lecture Notes $3.[$Ans: $y_n=1\mathrm{.}16ft]$