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VS2DRTI: Simulating Heat and Reactive Solute Transport in Variably Saturated Porous Media.

Richard W Healy, Sosina S Haile1, David L Parkhurst2

  • 1Toronto, Ontario, Canada M4C 1N8.

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|January 30, 2018
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Summary

A new software package, VS2DRTI, simplifies simulating groundwater flow, heat, and reactive solute transport in variably saturated porous media. This tool addresses the need for user-friendly models in environmental and geological applications.

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Area of Science:

  • Environmental Science
  • Hydrogeology
  • Geochemistry

Background:

  • Simulating variably saturated groundwater flow, heat, and solute transport is crucial for understanding environmental processes like water chemistry evolution and contaminant transport.
  • Existing fully coupled reactive transport models are often complex and difficult to use, limiting their widespread application.

Purpose of the Study:

  • To develop a simple and user-friendly software package, VS2DRTI, for simulating coupled water flow, heat transport, and reactive solute transport in variably saturated porous media.
  • To provide a tool that integrates flow, transport, and geochemical reaction capabilities for environmental modeling.

Main Methods:

  • The VS2DRTI software package was developed by coupling the VS2DT and VS2DH models for flow and transport with PhreeqcRM for geochemical reactions.
  • The model simulates two-dimensional, constant-density, variably saturated flow, heat and multicomponent solute transport, and geochemical reactions using PHREEQC.
  • A graphical user interface with preprocessor and postprocessor functionalities was implemented.

Main Results:

  • VS2DRTI successfully simulates complex coupled processes, including water flow, heat transport, and reactive solute transport in variably saturated porous media.
  • A hypothetical example demonstrated the model's capability in simulating the injection of heated wastewater into an aquifer with temperature-dependent cation exchange.

Conclusions:

  • VS2DRTI offers a simplified and accessible solution for simulating coupled hydrogeochemical processes.
  • The freely available public domain software facilitates research and application in environmental and geological studies.