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About cnr3

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  1. As you know MODFLOW transport calibration with PEST cannot be done in GMS GUI at the same time as heads and flux. This is a major limitation and without simultaneous calibration of both flow and transport, it is extremely difficult (impossible) to reduce the non-uniqueness in models. For our recent request to facilitate this feature, GMS informed that this change/update can be given a priority, if the popularity of the request is high. So, if you also feel that it is worthwhile to include this feature in PEST through the GMS, please email GMS with a feature request (support@aquaveo.com). Thank you
  2. Hi Maik I’m not sure I correctly understood your question. I also find it is harder to explain this without a graphical aid, but I’ll try. Try having a reasonable thickness for the whole layer – I guess you can have different thickness at different locations. Then I assume you would have a few computational layers within this layer. After you define the material properties during the 3D mesh construction, go to the 3D mesh and select the elements from the area where thickness is actually less, and change it to the material property as same as the upper/lower layer as appropriate. As you’ve a number of computational layers, you can change a few. This is tedious work and wouldn’t give you very smooth transition in material properties, but one way to overcome the numerical instabilities. Hope this would help
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