speedy 0 Posted March 6, 2016 Report Share Posted March 6, 2016 Hello everybody I have a MODFLOW 2000 model, which runs fine. I created MT3DMS model, which also runs fine. The problem is SEAWAT does not converge despite no error appears when I check simulation!. The message appears in mf2kerr.p00 file reads: MATRIX IS SEVERELY NON-DIAGONALLY DOMINANT. CHECK INPUT FILES Any suggestion? Thanks Quote Link to post Share on other sites
kcornwell 0 Posted March 24, 2016 Report Share Posted March 24, 2016 Speedy, An old Technical Support case of the same error with SEAWAT was solved by changing the density/concentration slope value, as it was too high. Take a look at the definition for this parameter and then come up with a more accurate value and you should see the problem resolved. Regards, Kyle Quote Link to post Share on other sites
Lau Petersen 0 Posted June 22, 2016 Report Share Posted June 22, 2016 I have had the same problem. I found out that the problem was that I had used negative values for certain model parameters, including horizontal K so I could specify them under MODFLOW -> Parameters, for inverse calibration. The solution was to enter all the parameter values manually after the calibration was done Lau Quote Link to post Share on other sites
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