For a $0\mathrm{.}500m$ diameter concrete $)=(0\mathrm{.}014$ pipe that is flowing at a depth of $0\mathrm{.}125m$ :

a$)$ What is the flow rate if the pipe slope is $0\mathrm{.}5\%?$

b$)$ For BOD $=340m\frac{g}{L}$ and $T=30C,$ is there a risk of hydrogen sulfide formation?