GGU-2D-TRANSIENT: "Linear (Potential or source)" menu item

After going to this menu item click the nodes of the FEM mesh to which time-dependent, linearly variable potentials or sources 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. This menu item can be useful for defining a receiving watercourse (horizontal-plane system) if its water level is linearly variable within the systems.