Groundwater

Storativity of groundwater \(S_{gw}\) (m) at time step \(t\):

\[S_{gw} = \int_{z_{gw}}^{Z_{gw-tot}} n_0 \cdot exp (-\frac{z_{gw}}{b})dz_{gw}\]

where \(z_{gw}\) is the depth of the groundwater table at time step \(t\) (m), \(Z_{gw-tot}\) is the thickness of the aquifer (m), \(n_0\) is the specific yield of the aquifer at the soil surface (-) and \(b\) is the decay coeffcient.