Item talk:Q336639

{

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   "@type": "CreativeWork",
   "name": "VS2DRTI - A Graphical Software Package for Simulating Water Flow, Heat Transport, and Reactive Solute Transport",
   "description": [
     {
       "@type": "TextObject",
       "additionalType": "description",

"abstract": "VS2DRTI is a graphical software package for simulating flow and transport in variably saturated porous media. This software package consists of two components: (1) VS2DRTI, for simulating water flow and heat and reactive solute transport, (2) a standalone postprocessor, for viewing results saved from previous simulation runs.

VS2DRTI combines a graphical user interface with a numerical model (VS2DRT) to create an integrated, window-based modeling environment. Users can easily specify or change the model domain, hydraulic and transport properties, initial and boundary conditions, grid spacing, and other model parameters. Simulation results can be displayed as contours of pressure head, moisture content, saturation, concentration or temperature, and velocity or flux for each time step, thus creating a simple animation. VS2DRT links the U.S. Geological Survey's computer models VS2DT (for solute transport), VS2DH (for energy transport), and Phreeqc (for geochemical reactions). VS2DRT is a finite-difference model that solves Richard's equation for fluid flow, and the advection-dispersion equation for heat solute transport. The model can analyze problems in one or two dimensions using either cartesian or radial coordinate systems. Relations between pressure head, moisture content, and relative hydraulic conductivity may be represented by functions developed by van Genuchten, Brooks and Corey, Haverkamp and others, or by data points. Initial hydraulic condition can be specified as static equilibrium, specified pressure head, or specified moisture content. Boundary conditions include specified pressure or total head, specified flux, infiltration with ponding, evaporation, plant transpiration, and seepage faces. Solute transport processes include advection and dispersion, as well as a complete implementation of the chemical reactions available in Phreeqc."

     },
     {
       "@type": "TextObject",
       "additionalType": "short description",
       "abstract": "Tool item published in 1999-07 sourced from the USGS Model Catalog"
     }
   ],
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       "value": "Q165909",
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       "name": "1999-07",
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       "value": "+1999-07-30T00:00:00Z"
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       "name": "hydrology",
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       "value": "Q158992",
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       "name": "groundwater",
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       "name": "10.1111/gwat.12640",
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   "additionalType": "Tool",
   "author": [
     {
       "@type": "Person",
       "name": "Richard W Healy",
       "identifier": {
         "@type": "PropertyValue",
         "additionalType": "ORCID",
         "value": "0000-0002-0224-1858",
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       "email": "rwhealy@usgs.gov"
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