Groundwater Hydrology

In an unconfined aquifer, a fully penetrating well of radius $r_w = 0.20\text{ m}$ is pumped to produce a steady drawdown of $s_w = 2.0\text{ m}$. The initial saturated thickness of the unconfined aquifer is $H = 20.0\text{ m}$. Calculate the equivalent drawdown $s'$ in a confined aquifer having the same transmissivity using Dupuit's correction $s' = s_w - \frac{s_w^2}{2 H}$ in $\text{meters}$.