The results of the verification models include the height of the groundwater level and the underground discharge in every boundary element. The heights are graphically represented by equipotentials. This picture includes some characteristic streamlines that together with the equipotentials form a flow net. According to the net the general direction of flow in the domain is the south or south-south east direction. The more permeable tectonic lines direct the flow only in a narrow band of a faulty zone. The drainage effect of the tectonic lines and the change in flow direction cannot be clearly seen from the isolines of potential. The net of streamlines evidently shows the preferred paths of the groundwater flow.