GGU-2D-TRANSIENT: "Linear (blanket layer water level)" menu item (for leaky aquifer only)

After going to this menu item click the nodes of the FEM mesh to which time-dependent, linearly variable water levels are to be assigned by means of a polygon course. Press the [Return] key and enter a start and an end polygon course. The program subsequently generates new polygon courses by linear interpolation of the spacing of the system nodes and assigns these to the corresponding nodes.