Question $2.$

Based on the given data, design the system and determine the dimensions of $1-2$ and $2-3$ pipes in the stormsewer system shown below.

$(L=200(m),n=0\mathrm{.}015,V_{\text{m}\text{a}\text{x}}=4\frac{m}{s},h_d=1\mathrm{.}2(m),J_{\text{m}\text{i}\text{n}}=\%o2,Q_0=100\frac{L}{s},t_e=15(min),t_f=1\mathrm{.}5(min),I=\frac{3000}{t})$