MODFLOW-USG GNC Package Workflow

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To use the Ghost Node Correction (GNC) package in an existing MODFLOW-USG project, use the following processes:

1. Begin with an existing MODFLOW-USG project.
The existing model can be created using the conceptual model or grid based approach.
2. Activate the ghost node correction package.
  1. Select MODFLOW | Global Options.
  2. In the MODFLOW Global/Basic Package dialog, select the Packages button.
  3. In the MODFLOW Packages/Processes dialog, select the GNC – Ghost Node Correction option.
3. Add GNC data.
  1. Select the MODFLOW | Optional Packages | GNC – Ghost Node Correction Package menu command.
  2. Compute ghost node correction data in the GNC Package dialog.
  1. Save Save Macro.svg the project.
  2. Run MODFLOW Run MODFLOW Macro.svg.