Download TOCHNOG PROFESSIONAL Tutorial manual Version 23

4
Tutorial 2: non-saturated dam with seepage edge
This tutorial shows how to perform a non-saturated groundflow analysis in a dam. Figure 7 shows
the dam.
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Figure 7: Dam
At the lower part of the right edge a water level of 20m is present, by example because of a
lake. The lower edge of the dam does not allow for inward or outward flow of ground water, it is
non-permeable. The left edge is a seepage edge, it only allows for outward water flow and not for
inward water flow.
4.1
Mesh generation with Gid
The mesh generation in Gid is very similar to tutorial 1, so it is not repeated here. We just remark
that the element size, as required in the Gid Mesh - Generate dialog should be set to 1.0 to get
a reasonably fine mesh.
Figure 8: Nurbs surface of dam
Figure 8 shows the Nurbs surface. Figure 9 shows the mesh.
4.2
4.2.1
Input file
Initialization part
echo -yes
number of space dimensions 2
groundflow pressure
groundflow saturation
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