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SEAWAT does not converge!


speedy

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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

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  • 3 weeks later...

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

 

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  • 2 months later...

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

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