Q = { 0 , Z ≤ Z 0 C w L w ( Z − Z 0 ) 1.5 , Z 0 ≤ Z ≤ Z 0 + H 0 C d A 0 2 g ( Z − Z 0 − 0.5 H 0 ) , Z 0 + H 0 ≤ Z ≤ Z 1 C w L w ( Z − Z 1 ) 1.5 + C d A 0 2 g ( Z − Z 1 ) , Z 1 < Z {\displaystyle Q=\left\{{\begin{matrix}0,&Z\leq Z_{0}\\C_{w}L_{w}\left(Z-Z_{0}\right)^{1.5},&Z_{0}\leq Z\leq Z_{0}+H_{0}\\C_{d}A_{0}{\sqrt {2g\left(Z-Z_{0}-0.5H_{0}\right)}},&Z_{0}+H_{0}\leq Z\leq Z_{1}\\C_{w}L_{w}\left(Z-Z_{1}\right)^{1.5}+C_{d}A_{0}{\sqrt {2g\left(Z-Z_{1}\right)}},&Z_{1}<Z\end{matrix}}\right.}
