Seepage Modeling with SEEP/W - GeoStudio 2007 version 7.22

Chapter 3: Geometry and Meshing
SEEP/W
Figure 3-25 Mesh showing angular surface slope breaks
In order to create a surface mesh with more rounded features it is necessary to build the underlying soil
mesh with the same rounded profile. This is easily accomplished in GeoStudio by adding additional
region points near a slope break such that the region points can be moved slightly to create a rounded
profile. This is the case in Figure 3-26 below where three region points are used at both the toe and crest
of the slope. Also notice that three region points are used on the bottom of the mesh beneath the toe and
crest location. This is a useful tip to remember. When you want to have more control over the trans-finite
element mesh you should add region points on opposite sides of the mesh from where you need the detail.
As a final note, adding region points can be done at any time – even after the surface layer is created.
When the region beneath a surface layer is changed, the surface layer above it will be automatically
regenerated to ensure mesh compatibility with the region below.
Figure 3-26 Region mesh with region corner points viewed and surface details not
viewed
3.5 Joining regions
Compatibility must be maintained between regions to ensure the regions are connected. Regions must be
joined at the region points and points must be common to adjoining regions for the regions to be properly
connected. GeoStudio has a number of features to assist in achieving region compatibility.
The following are some of the main characteristics:
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