As pit flooding is a transient process, the initial conditions must first be defined. A seepage boundary condition must be assigned to the model nodes that define the pit. The example archive "fl0.zip" contains a structure file with the corresponding structure (attribute SICK), which is assigned to node layers 6 and 7.

After saving the model file, the model check (step 1) is started with Calculation Model checking… and then a steady state flow calculation (step 2) is performed with Calculation Steady state flow...

The calculation results are shown in the following figure. This vertical section can be created using the plot batch file "cs.bpl" (archive "fl0.zip").

Vertical section with the results of the steady state flow calculation

Simulation 1: Natural flooding