K2dGrFlow is an application for the simulation of 2 dimensional groundwater flow under strict conditions:
The problem is steady state, so no time variance
It's a model for low conductive aquifiers, eg clay
Only impenatrable boundaries are considered (which means or a layer with a conductivity some orders lower than that of our domain, ar a symmetry boundary like a water-divide), or a boundary with condition that the hydraulic head on the boundary is z (=the depth). This means that atmospheric pressure holds on that boundary, so the watertable runs equal with the boundary, and because of our first condition, doesn't change with time.
Added is the possibility of a boundary where the hydraulic head fulfills the equation : hydraulic_head_on_boundary= a*x+b, with a and b constants and x the x-coordinate. Only use this if you understand the implecations. It is generaly used for the lower boundary of the domain, where we suppose a high conductivity under Dupuit-Forchheim conditions.
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The user has the ability to input a domain with a specific dialog. He can do this with lines, or with a sinus function. The domain must be given counterclockwise. This domain is then divided in triangles by clicking the mesh button. When this is finished, by a click on the run model button, the program calculates a solution of the equation that solves the hydraulic head in the domain. A contour diagram of this hydraulic head can be plotted or printed Flowlines are perpendicular to these equipontential lines, so the user can imagine the flow of the groundwater through the domain.
The equation that's solved is 
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Please report any problems to me by email.