HR: 0800h
AN: H21E-1068    [Abstracts]
TI: Numerical Simulation of Field-Scale Transport and Biogeochemical Reactions Using a Particle-Based Method
AU: * Scheibe, T D
EM: tim.scheibe@pnl.gov
AF: Pacific Northwest National Laboratory, P.O. Box 999 MS K9-36, Richland, WA 99352 United States
AU: Brooks, S C
EM: brookssc@ornl.gov
AF: Oak Ridge National Laboratory, P.O. Box 2008 MS 6038, Oak Ridge, TN 37831-6038 United States
AU: Roden, E E
EM: eroden@bsc.as.ua.edu
AF: University of Alabama, Department of Biological Sciences, Tuscaloosa, AL 35487-0206 United States
AB: Field research on biostimulation for remediation of uranium contamination in groundwater is ongoing at a field site near Oak Ridge, TN. Several alternative approaches to numerical simulation of field-scale transport and biogeochemical reactions have been implemented to support design and interpretation of field tracer and biostimulation experiments. One such approach involves simulation of advective-dispersive transport, kinetic mass transfer between advection-dominated and diffusion-dominated subdomains, and microbial utilization of carbon source amendments using a discrete particle-based method in which reactions are formulated in terms of particle transformation probabilities rather than concentration changes. We describe the method, demonstrate its application to pre- and post-modeling of tracer and electron donor injection events, and compare model results to field observations.
DE: 3210 Modeling
DE: 1829 Groundwater hydrology
DE: 1832 Groundwater transport
SC: Hydrology [H]
MN: 2004 AGU Fall Meeting