GGU-2D-SSFLOW: "Modify (depths)" menu item
You can modify all z-values as a function of the existing z-values. The following dialog box shows an example where the base of the aquifer lies at 12 m below the existing aquifer top at all nodes.

You can modify all z-values as a function of the existing z-values. The following dialog box shows an example where the base of the aquifer lies at 12 m below the existing aquifer top at all nodes.