NEW version of HGS PREMIUM October 2025 (REVISION 2878)
The HydroGeoSphere Revision 2878 (October 2025) is now available for download.
This month’s update delivers key refinements to initialization commands, improvements to total dissolved solids (TDS) handling, and several performance enhancements across grok and hgs2vtu. Together, these updates streamline model setup, improve stability, and expand flexibility for defining initial and boundary conditions in HydroGeoSphere (HGS).
New and updated commands (see hydrosphere_ref.pdf)
New hgs2vtu command
--time-series-only
Limits processing to time series output files, skipping binary output files—saving time and system resources during post-processing.New command
locked in tds no mass balance
Skips the mass balance computation for the TDS solute after the first time step when used withlocked in tds, reducing unnecessary computation for fixed-density systems.New command
initial head from saturation
Computes the porous medium initial head from a user-specified water saturation value across a chosen set of nodes, providing more flexibility when defining starting conditions.
Fix for initialization from depth-saturation tables
Resolved a bug in the command initial head from depth-saturation table that caused grok to crash when processing tables containing more than 100 rows.
Refactored TDS handling for better performance
The command locked in tds has been optimized so that only a single flow and transport solve is performed per time step when TDS concentration and fluid density are fixed. This refactor substantially reduces runtime for models that include total dissolved solids.
Refined computation of initial head from depth-saturation tables
Updated the initial head from depth-saturation table command to compute initial head using a volume-weighted average of head values over the elements contributing to each nodal control volume.
Documentation updates
The HydroGeoSphere Reference Manual (hydrosphere_ref.pdf) has been updated with details on all new and refined commands.
You can find details about these new features in the HydroGeoSphere Reference Manual. And as always, we are committed to the continued improvement to the user experience. Do you have suggestions for new commands or improvements to the user experience? Send your ideas to support@aquanty.com!
The latest installers are available on the HGS download page and a full list of changes/updates can be found in the release notes.
Download the October 2025 release of HydroGeoSphere here: https://www.aquanty.com/hgs-download
Review the release notes here: https://www.aquanty.com/updates