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RESEARCH ACTIVITIES AT U.S. GOVERNMENT AGENCIES IN SUBSURFACE REACTIVE TRANSPORT MODELING
Citation:
CYGAN, R. T., C. T. STEVENS, R. PULS, S. B. YABUSAKI, R. D. WAUCHOPE, C. J. MCGRATH, G. P. CURTIS, M. D. SIEGEL, L. A. VEBLEN, AND D. R. TURNER. RESEARCH ACTIVITIES AT U.S. GOVERNMENT AGENCIES IN SUBSURFACE REACTIVE TRANSPORT MODELING. Vadose Zone Journal. Soil Science Society of America, Madison, WI, 6(4):805-822, (2007).
Impact/Purpose:
Improve the scientific understanding of the processes controlling nutrient distributions in surface waters. Produce a suite of enhanced models for characterizing nutrient distributions in surface waters by incorporating improved process understanding in existing models (e.g., WASP), by developing new models (e.g., WHAM, reactive transport), and improving linkages between model components.
Description:
The fate of contaminants in the environment is controlled by both chemical reactions and transport phenomena in the subsurface. Our ability to understand the significance of these processes over time requires an accurate conceptual model that incorporates the various mechanisms of coupled chemical and physical processes. Adsorption, desorption, ion exchange, precipitation, dissolution, growth, solid solution, redox, microbial activity, and other processes are often incorporated into reactive transport models for the prediction of contaminant fate and transport. U.S. federal agencies utilize such models to evaluate contaminant transport and provide guidance to decision makers and regulators for treatment issues. Summaries of selected research projects and programs are provided to demonstrate the level of activity in various applications and to present examples of recent advances in subsurface reactive transport modeling.