HSSM Model - hydrocarbon spill screening model for light nonaqueous phase liquids (LNAPLs)
HSSM Model Category: multiphase flow and transport
HSSM (Hydrocarbon Spill Screening Model) is a U.S. EPA model which simulates subsurface releases of light nonaqueous phase liquids (LNAPLs). The HSSM model includes separate modules for LNAPL flow through the vadose zone, spreading in the capillary fringe, and transport of chemical constituents of the LNAPL in a water-table aquifer. These modules are based on simplified conceptualizations of the flow and transport phenomena which were used so that the resulting model would be a practical, though approximate tool. Both DOS and Windows interfaces are provided to create input data sets, run the model, and graph the results. HSSM includes the executable, source code and technical support.
This product is no longer commercially available. However, it can be downloaded for free on our download site.
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