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One TWODAN model plotted at various scalesThe plot below is at a regional scale, showing all elements in the model. The elements are in green. Head-specified linesinks form constant head boundaries at streams, ponds, and wetlands. A high conductivity glacial outwash valley aquifer is represented by a heterogeneity in the upper right area. A well with a U-shaped resistant (leaky) barrier is within this heterogeneity.
The plot below is the same model and solution as above, just a different, smaller window chosen for the plot. It shows the heterogeneity and barrier area in more detail.
The plot below is still the same model, but even more close up on the well and barrier. Note the accuracy of the solution near the well and barrier, despite the large extent of the entire model. This level of accuracy and flexibility with model boundaries is not found in finite-difference or finite element numerical methods.
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