
Staff Research Highlight - A dynamic meshing scheme for integrated hydrologic modeling to represent evolving landscapes
We’re pleased to highlight this publication which introduces a novel dynamic meshing scheme for integrated hydrologic modelling to better represent evolving landscapes. The approach addresses a major challenge in modelling human-altered environments, particularly in regions undergoing rapid changes such as open-pit mining sites, land reclamation zones, or urban developments. Traditional hydrologic models often rely on static mesh geometries, limiting their ability to capture changes in topography and subsurface structure over time. This research proposes a more flexible, adaptive framework capable of simulating surface and subsurface hydrologic responses to complex engineering activities.

HGS RESEARCH HIGHLIGHT – Modeling fate and transport of E. coli in a small watershed with grazing lands around a pond
This research investigates the fate and transport of E. coli in a small watershed with grazing lands surrounding a pond, using HydroGeoSphere (HGS) to develop a mechanistic numerical model. Understanding how E. coli moves through surface and subsurface water systems is crucial for managing microbial contamination risks in agricultural watersheds, where livestock activities can significantly impact water quality.
NEW version of HGS PREMIUM May 2025 (REVISION 2829)
The HydroGeoSphere Revision 2829 (May 2025) is now available for download.

HGS RESEARCH HIGHLIGHT – Monetizing the role of water in sustaining watershed ecosystem services using a fully integrated subsurface–surface water model
This research, co-authored by David R. Lapen, Susan Preston, Tariq Aziz, and Steven K. Frey, highlights the role of subsurface water in sustaining ecosystem services during droughts. Using HydroGeoSphere (HGS), the team analyzed the South Nation Watershed (SNW) in eastern Ontario, emphasizing how subsurface water supports evapotranspiration in agricultural landscapes.
NEW version of HGS PREMIUM April 2025 (REVISION 2817)
The HydroGeoSphere Revision 2817 (April 2025) is now available for download.

HGS RESEARCH HIGHLIGHT – Numerical analysis of thermal response tests with groundwater flow and heat transfer model
This research, co-authored by J. Raymond, L. Gosselin, R. Lefebvre, and Aquanty’s René Therrien, explores how thermal response tests (TRTs) can be enhanced by employing HydroGeoSphere (HGS), our advanced modelling platform, to simulate coupled groundwater flow and heat transfer processes under complex geological settings. The study investigates the limitations of traditional line-source models, particularly in heterogeneous subsurface conditions, and introduces a numerical modelling approach to improve the accuracy of TRT analyses.
NEW version of HGS PREMIUM March 2025 (REVISION 2796)
The HydroGeoSphere Revision 2796 (March 2025) is now available for download.

Using the debug.control file for real-time tuning of HGS simulation performance
This post explains how to use the debug.control file to modify the performance of an HGS simulation in real-time. By adjusting settings in the debug.control file, users can tweak parameters like convergence and time stepping without needing to restart the simulation. This is particularly helpful for optimizing the simulation's behavior during runtime. We find that using debug.control is a great way to test different settings and improve model performance on the fly. The file also provides the flexibility to pause simulations or adjust output, making it an essential tool for users looking to troubleshoot or fine-tune their models.

HGS RESEARCH HIGHLIGHT – The HypoSalar project: Integrating hyporheic exchange fluxes into Atlantic salmon (Salmo salar) spawning habitat models
In this research highlight ultra-fine resolution HydroGeoSphere models are used to simulate hyporheic exchange fluxes in river reaches used by Atlantic salmon for spawning. The HypoSalar project is contributing to demonstrate that the capabilities of HydroGeoSphere are not exclusively related to the field of hydrogeology, but can be used for both fluvial geomorphology and ecological studies due to HydroGeoSphere's flexibility and superior modeling approach.
NEW version of HGS PREMIUM February 2025 (REVISION 2778)
The HydroGeoSphere Revision 2778 (February 2025) is now available for download.