Aquaveo & Water Resources Engineering News

MNW2 - Multinode Well 2 Package

GMS version 8.3 has added support for the MNW2 package in MODFLOW. This package is an update to the MNW1 package. In addition to supporting the capabilities of the MNW1 package, the MNW2 package can also calculate additional head changes due to partial penetration affects, flow into a borehole through a seepage face, changes in well discharge related to changes in lift for a given pump, intraborehole flows with a pump intake located at any specified depth in the well, and improved capability to simulate nonvertical wells.

Take a look at the GMS learning center here for new tutorials with the MNW2 package.

GMS supports manually creating/editing MNW2 boundary conditions directly on the MODFLOW grid.

In addition, the conceptual modeling tools have been updated to support the MNW2 package.


GMS continues to add support for MODFLOW packages. Look for more packages in the near future. Happy modeling!

June 2012 Sprint Highlights

Some of the more interesting accomplishments from the June 2012 sprint:
  • Fixed over 10 bugs
  • Switched all model code to use the newer version of Visual Fortran
  • Taught a GMS training course in France
  • Good progress on the MODFLOW SUB package interface
  • Updated MODFLOW-NWT with the latest from the USGS
  • Overhauled the MODFLOW menu to make it more usable
  • Implemented more raster features including a raster catalog and virtual earth dialog buttons
  • Added text in the MODFLOW Global Options dialog to show what MODFLOW executable will be used
  • Added support for multiple CAD files
  • Created a CAD properties dialog
  • Overhauled how z values relate to the active data set for TINs, 2D meshes and 2D scatter points to make it simpler and easier
  • Started displaying the current project and the latitude and longitude at the bottom of the graphics window

May 2012 Sprint Highlights

Some of the more interesting accomplishments from the May 2012 sprint:
  • Fixed over 19 bugs
  • Overhauled the MODFLOW ccf file reader to be more generic
  • Much progress on the MODFLOW SUB package
  • Updated MODFLOW 2005 executable with the latest changes from USGS
  • Mostly finished phase 1 of PEST Null Space Monte Carlo support
  • Began adapting MODFLOW LGR to GMS format
  • Finished several raster features including interpolation and conversion to/from other object types
  • Added more "Open containing folder" commands where they were needed
  • Made it so we just link to CAD files instead of saving them with the project
  • Added duplication of MODFLOW array data in the Project Explorer
  • Removed the interface for flow observations with the SFR package since MODFLOW doesn't support this
  • Added commands to Expand / Collapse most items in the Project Explorer
  • Split the MODFLOW conceptual model tutorial into two separate tutorials
  • Finished the MODFLOW MNW2 package tutorial for non-vertical wells and pump capacity
  • Added more bitmaps in the menus and made the old ones look better