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Found 2 results

  1. I use Kriging and variograms to describe spatial variability of pilot points for HK and RCH in a PEST parameter estimation simulation. I use the log values for both HK and RCH. For one pilot point set it works perfectly fine to use a logarithmic semivariogram, which also looks reasonable. These HK values are in the range between 1e-4 to 1e-6 m/sek. For pilot point sets with lower values (in the range between 1e-8 and 1e-10) I get the following message when I try to build a logarithmic semivariogram: Warning. There were no points calculated; bad lag parameters! A semivariogram (that is not logarithmic) does however allow me to build a variogram. I have two questions: 1. What is the reason for this warning? 2. Would it be a significant difference in interpolation between a semivariogram and a logarithmic semivariogram? I am happy to receive any comments and ideas on these issues. Kind regards, Jonas
  2. Hi, When i customize the variogram for the pilot points of the HK-field in the nsmc I and II tutorials, and also in my own models, I encounter the problem showed in the attached figure. It seems like the whole field is generated from only one point and not all available ones. I also edited the already set up variogram in the tutorials, and then changed back to its original form and still got the same problem. Any ideas on how to solve this issue? Kind regards, Jonas
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