Simulating Radionuclide Fate and Transport in the Unsaturated Zone: Evaluation and Sensitivity Analyses of Select Computer Models

摘要

This report is concerned with the evaluation and sensitivity analysis of select computer models for simulating radionuclide fate and transport in the unsaturated zone. The work reported here was performed in support of the U.S. Environmental Protection Agency's (EPA's) project on Soil Screening Guidance (SSG) for Radionuclides (U.S. EPA, 2000ab). The models reviewed and evaluated in the current report form a small subset of the models available to the public, and those which are considered have not met U.S. EPA approval for the exclusive use in the Soil Screening Level (SSL) process. Other models also may be applicable to the SSL effort, depending on pollutant-and site-specific circumstances.