Design the required rectangular sedimentation tank$($s$)$ for a water treatment plant given the

following information:

Flow rate: $37,900\frac{m^3}{d}$

Detention time: $3\mathrm{.}1$ hours

Surface loading rate $($overflow rate$)$: $38\frac{\frac{m^3}{d}}{m^2}$

$L=4W$

Weir loading rate: $240\frac{m^3}{m}\frac{?}{?}$ day. The weir should be designed to achieve the geometry

given below. Find the value of Width of Basin $($W$),$ Length of Basin $($L$),$ Total Weir

Length and Value of $"$b$"$ below.