GMS

GMS Sprint June 2014

  • Fixed three bugs
  • modflow.org complete
  • UGrids added to Display Themes
  • Double-click on UGrid cell opens Properties dialog
  • TINs and Rasters added for SFR2 elevations
  • PEST 13 support added
  • Qt interface progress
  • Posted GMS 10.0 beta
  • 2D UGrid from 3D UGrid
  • UGrid lighting now works
  • UGrid mouse tracking now works
  • Switched from "node" to "point" terminology with UGrids
  • Designed MODFLOW SWI interface
  • UGrid from imported .gsf file
  • PEST-ASP now treated as a MODFLOW package
  • Interpolate from scatter points to UGrid
  • CLN interface started
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GMS Sprint April 2014

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MODFLOW Native Text Format

GMS uses a modified version of MODFLOW that can read data from HDF5 files. HDF5 is a binary, cross-platform file format for storing data. Large portions of the MODFLOW inputs are stored in an HDF5 file when creating a MODFLOW model in GMS. Large MODFLOW models are stored much more efficiently using HDF5 (compression ratios of 95% when compared to text files are common). Also, the read/write times are much faster with the binary HDF5 file when compared to text files.

Even though it has been shown that HDF5 with MODFLOW is extremely efficient, many users would also like to have their MODFLOW simulations in the native MODFLOW format. This is particularly true when completing a modeling project and the user needs to archive the project.

Native MODFLOW text files can be saved from GMS. Beginning with version 10.0, these text files also contain documentation comments that more clearly identify the contents of each line in the MODFLOW input file. Further, parameter definitions are also included in the text files.

There is a new video on the aquaveo youtube channel that highlights this feature. There is also a new tutorial that explains the various options associated with this feature.

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