New in Groundwater Vistas 7

Licensing & Operating Systems

  • Native 64-bit Version of Groundwater Vistas & all models
    • Available in Standard Mode now with size limitations (see below)!
    • Standard Mode now supports MODFLOW-USG in normal grids
  • Supports 32-bit and 64-bit Versions of Windows XP, Vista, 7, 8, and 10
  • HASP keys (dongles) allow us to provide upgrades via email (if you have version 6, you do not need a new dongle)

New Model Versions

  • MODFLOW2005 Version 1.12
  • MODFLOW-NWT Version 1.1.2
  • MODFLOW-USG Version 1.3 & Beta Version
  • MT3D-USGS (finally an update for MT3DMS)
  • MODPATH Version 7
  • MODFLOW-Surfact Version 4*
    • Including TMP1 Package for transient hydraulic property changes
    • Density-dependent Flow
    • MODHMS support for CHF, OLF, IPT (Professional & Premium only)
  • PEST Version 14 (with BEOPEST)
  • PEST_HP for highly parameterized inversions*
  • Brute Force upgraded to work with any MODFLOW/MODPATH combination
  • AlgoMesh Version 1.2 provided in Professional & Premium versions

* Requires additional purchase

MT3D Packages & Options

  • MT3D-USGS – new version from USGS
  • Contaminant Treatment System (CTS) Package
  • Streamflow Transport (SFT) Package
  • Lake Transport (LKT) Package
  • Unsaturated Zone Transport (UZT) Package
  • Chain decay and EA/ED Reactions

MODFLOW Packages & Options

  • MODFLOW-USG option to only use active cells for significant runtime reduction
  • Combine nested and Quadtree grids in same model with MODFLOW-USG
  • Triangular and Voronoi grids for MODFLOW-USG (Professional & Premium only)
  • MODFLOW-USG dual domain transport
  • SAMG Solver for MODFLOW-USG and MODFLOW2005*
  • Density-dependent transport in MODFLOW-USG Beta version
  • Connect CLN Wells to CLN Polylines
  • ETS and TVM2 Packages in MODFLOW-USG
  • Specified Gradient boundary condition in MODFLOW-USG
  • QRT Package in MODFLOW-USG allows return flow from CLNs

* Requires additional purchase

Groundwater Vistas Interface

  • Hot-key to turn grid on/off
  • Zoom to node in unstructured grids
  • CLN report for MODFLOW-USG
  • Mass balance calculations include connected linear networks
  • Interface with Rockworks
  • Import/Export CLN polyline files

Pest and Calibration

  • Facilitate the use of Pest::Cloud (
  • Transient recharge pilot points
  • Support for the new PEST_HP
  • New censored range target
  • Customized difference targets
  • Standard Monte Carlo in addition to Null Space Monte Carlo (this replaces the old Stochastic MODFLOW/MT3D from older versions)
  • MNW2/CLN Heads for multi-layer Calibration targets

Changes to Size Limitations

  • Standard Version limited to 1,000,000 cells and 250 stress periods
  • No size limitations in Advanced, Professional, and Premium versions
  • Unlimited number of PEST parameters (GV6 was limited to 600)
Groundwater Vistas