Lisa Molofsky, PhD, PG has co-authored a new article titled "A combined 228Ra/226Ra and 87Sr/86Sr approach to identify the production of out-of-zone formation...
Lisa Molofsky, PhD, PG has co-authored a new article titled “A combined 228Ra/226Ra and 87Sr/86Sr approach to identify the production of out-of-zone formation fluid from Marcellus shale gas wells,” published in Applied Geochemistry.
This article, co-authored with M.A. Engle, T.W. Wagner, A.S. Wylie, and D.P. Fernandez, presents a geochemical method that combines radium and strontium isotope ratios to determine the origin of high-salinity fluids produced from Marcellus shale gas wells. The study provides valuable insights into identifying out-of-zone water production and offers a framework that could be applied to other oil and gas basins.
Read the full paper here: https://www.sciencedirect.com/science/article/pii/S0883292725002938?dgcid=author
GSI has released Version 2.6.0 of USG-Transport (USGT), our advanced groundwater modeling tool for structured and unstructured grids. This latest update includes...
GSI has released Version 2.6.0 of USG-Transport (USGT), our advanced groundwater modeling tool for structured and unstructured grids. This latest update includes expanded capabilities, bug fixes, and documentation updates that support more flexible modeling and improved accuracy.
What’s new in Version 2.6.0?
• DRT: Now supports multiple return flow cells per drain cell, allowing more uniform water distribution across recharge zones or agricultural fields
• BCT: Added Variable Solubility option to account for spatial variability in solubility parameters
• New documentation provides guidance for simulating evapotranspiration in variably saturated soils using the EVT or ETS packages
The update also includes example datasets and a ReadMe file outlining the changes.
USGT supports a wide range of groundwater and solute transport processes, including:
• PFAS and heat transport in vadose and saturated zones
• Connected linear networks (CLNs) for modeling wells, streams, wetlands, and infrastructure
• Saturated and unsaturated flow using the 3-D Richards Equation
• Dual porosity and multicomponent transport with chain decay
• Borehole Heat Exchangers (BHEs)
• Density-dependent flow and transport
• Advanced recharge and extraction options through the QRT and DRT packages
• PHREEQC integration available as a separate executable
• Support for GUIs, PEST utilities, and particle tracking
Access the update and supporting documentation at:
https://www.gsienv.com/product/modflow-usg/
You can also find the PFAS-focused version at:
https://www.gsienv.com/software/modflow-usg/usgt-pfas/
USGT continues to evolve to meet the needs of environmental professionals solving complex groundwater challenges.