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Importing MODFLOW Model


Bruce Campbell
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Hi -- I'm having a problem importing the LAK package into GMS from a set of native MODFLOW files not created by GMS. I have an existing MODFLOW model using a number of packages but there is something about the LAK package that the translator doesn't like. The MODFLOW translator runs to completion but when I click "Done" to close the MODFLOW translator, I get an error message that says "Error reading LAK package". I can take the LAK package out of the *.NAM file and the MODFLOW translator runs fine and the files come into GMS with no problem.

I don't have a *.gpr file in the zipped file.

I've put the files on your FTP site: NC.zip

If you look in the "transient" directory you'll see a the MODFLOW NAM file: NC_trans.nam

Any help would be appreciated.

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Hi Alan -- Got the files, have it GMS and the model is running fine. Question for you, I would like to georeference the grid to be able to use a good bit of GIS data. I attempted it this morning but went through a long trial and error process using the Edit -> Transform -> Translate command but still didn't have a satisfactory match and something seemed to happen to the files and the model world not run. Started over and looked through the documentation a little closer and found that there used to be a "Coordinate Transformation Wizard" that doesn't seem to be available any more. Wondered if you had any thoughts on this?

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When I have done this I will usually figure out the location of the bottom, left corner of the grid in the projection where I want to work and set the value using the properties dialog for the 3D grid (Right click on the 3d grid in the project explorer). Then I adjust the rotation angle as needed to get things to line up, again in the properties dialog of the 3D grid.

Let me know if that does not make sense

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Hi Alan -- Me again. I'm working with another USGS modeler and he modified the NC model and sent me a new version. The LAK package does the same thing as before. Is it something I can modify in the LAK input file or can I ask you to redo the translation? If you need to redo, the files will be NC_2.zip on your FTP site. Thanks -- Bruce

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