DHIJWASv Software FEFLOW 6.1

RK=pìéÉêãÉëÜ=aÉëáÖå
PM=ö=rëÉê=j~åì~ä
nation sites in the supermesh. These cannot be
imported from a map via the Convert to option as
this would lead to overlapping polygons. Instead, we
will split the existing polygon and cut out the contamination
sources. Start with the eastern source of contamination.
Click on Split Polygons and select the map
waste_disposal from the dropdown list in the
Mesh-Editor toolbar. To digitize the contamination
source accurately we can use a tool that snaps to
the fixed points of this map. To activate the snapping
click on Snap to Points right next to the dropdown
list.
Figure 5.9 Polygon splitting along contamination site.
Polygon splitting must start and end at an already
existing polygon border. As the contamination sources
are located completely inside the model area two cuts
are necessary. Start on an arbitrary point on the model
boundary and go halfway around the contamination
source. To complete the first cut, return to the model
boundary on the other side (see figure 5.9). Complete
the polygon with a second cut along the missing parts
of the contamination source polygon.
Complete the supermesh by creating the polygon
for the second contamination source in the same way,
this time selecting sewage_treatment from the dropdown
list in the Mesh-Editor toolbar.
An exemplary finished supermesh setup is shown in
figure 5.10.
Figure 5.10 Completed supermesh.