Seepage Modeling with SEEP/W - GeoStudio 2007 version 7.22

Chapter 3: Geometry and Meshing
SEEP/W
be applied to a wider range of problems than any system that attempts to describe the whole domain as a
single object.
Regions may be simple straight-sided shapes like quadrilaterals or triangles or a free form, multi-sided
polygon. Figure 3-5 illustrates a domain constructed using one quadrilateral and two triangular regions.
Also shown in this figure are the region points and the region lines. Each segment of a region edge
between any two adjacent points is called a line. Both points and lines can have special properties as
discussed in the next sections. In this figure the lines and points are not “free” as they belong to a region.
They do, however have similar behavior to free points and lines.
Figure 3-6 shows a multi-sided polygonal region defined using 10 points. There is no restriction on the
number of points in a region. However, the rule of thumb to keep things simple is always encouraged.
Points
Lines
Figure 3-5 Illustration of a region’s lines and points
10
9
8
7
6
5
4
3
1 2
Figure 3-6 A multi-side polygonal region
Points can be selected and moved to modify the shape and position of regions, which provides for great
flexibility in making adjustments and alterations to a problem definition.
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