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Niklas Jannok

MT3D-USGS with dry cells

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Hi Community,

I am trying to run MT3D-USGS in a model which contains plenty of dry cells computed by mf2k5, but MT3D-USGS chrashes. The .out file reports that plenty of cells have "saturated thickness =0.0000" (i.e. they are dry), "not allowed in transport model" and furthers says "reset as incative". I have attempted to set some of the dry cells as inactive, but those cell still show up as erroneous in the output file. What am I missing, or what can I do to make MT3D-USGS work?

- Niklas

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Is there a specific reason you want to use MT3D-USGS with mf2k5? There is not any additional functionality over MT3DMS in the current GMS interface.

MT3D-USGS has additional functionality for working with models with dry cells but it must be a MODFLOW-NWT model for that functionality to work and you must turn on the "DRYCELL" option in the BTN package.

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Hi Alan, thanks for replying,

I do not know why I was running the model with mf2k5, that was my mistake. The model is functioning with mf-nwt. The core of my problem is that I am attempting the utilise the Stream Flow Transport (SFT) and the LaKe Transport (LKT) packages released alongside MT3D-USGS. I am currently running MT3D-USGS externally (with all of the associated problems) with modflow files exported from GMS, but it would be much easier for me if it somehow was possible to utilise the SFT and LKT packages directly in GMS.

I belive that this is currently not possible, is that correct?

- Niklas
 

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