$-11.$ Design a splitting box for two identical circular clarifiers. The total flow rate is $8,450$

$\frac{m^3}{d}.$ To complete the design, provide the diameter of the inlet pipe, the dimen$-$

sions of the splitting box, the weir length for each clarifier, and a sketch that shows

the plan, profile, and cross section with dimensions. Assume a peaking factor of $3\mathrm{.}0$

and a head of $10$ cm on a sharp$-$crested weir.