(Solved): 8- A standard horseshoe channel cross-section is predominantly used in storm water and sewer pipeli ...

8- A standard horseshoe channel cross-section is predominantly used in storm water and sewer pipelines and siphon spillways. The cross-sectional area of the standard horseshoe channel is approximated by a linear correlation as $A=17.952y?8.667$. The top width, $T$, and hydraulic radius, $R$, of the horseshoe section approximated by polynomial function for $y>1\mathrm{m}$ as: $T=?0.089y^2+1.5585y+13.455$ $R=?0.027y^2+0.82y?0.23$ Use the approximated equations and calculate the critical depth for a discharge of $Q=600\mathrm{m}3/\mathrm{s}$. Figure 3-14: A standard horseshoe channel cross- section.