![]() Dilution and transport in the saturated zone beneath the source, including advective-dispersive-reactive transport to a potential receptor.įigure 1 Conceptual model for the Source Screening ModuleĪt complex sites there may be many potential sources of contaminants within the vadose zone. ![]() Calculation of pore water concentration from measured soil concentration in the source area.The SSM integrates three sequential calculations into a single simulation: The conceptual model for the SSM is shown schematically in Figure 1. The SSM integrates several transport processes in a single simulation that is implemented within a user-friendly, Microsoft Excel TM -based interface. This tool implements analytical solutions to simulate contaminant transport through the unsaturated and saturated zones to predict time-varying concentrations at potential groundwater receptors. A Source Screening Module (SSM) has been developed in MS Excel to support preliminary evaluation of the threat posed by vadose zone waste sites on groundwater quality.
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