GGU-3D-SSFLOW: "Point sources" menu item
Using this menu items source boundary conditions are defined within the FEM system in analogy to the potential boundary conditions (see Section "Individual potentials" menu item). A source is positive if it brings water into the system.
Note on impermeable boundaries:
The case of an impermeable boundary is automatically considered by the finite-element-method. Valid is, that all system boundaries or partial boundaries which have no water level or source boundary conditions, are automatically impermeable.