2006 Philadelphia Annual Meeting (2225 October 2006)
Paper No. 40-1
Presentation Time: 1:45 PM-2:05 PM

HYDROGEOLOGIC CONTROLS ON SUBSURFACE BIOGEOCHEMISTRY: FIELD-SCALE EFFECTS OF HETEROGENEOUS COUPLED PHYSICAL AND BIOGEOCHEMICAL PROCESSES

SCHEIBE, Timothy D., Pacific Northwest National Laboratory, P.O. Box 999, MSIN K9-36, Richland, WA 99352, tim.scheibe@pnl.gov, FANG, Yilin, Pacific Northwest National Laboratory, P.O. Box 999 MS K9-36, Richland, WA 99352, TARTAKOVSKY, Alexandre M., Computational Mathematics, Pacific Northwest National Laboratory, P.O. Box 999, MSIN K6-08, Richland, WA 99352, and REDDEN, George, Idaho National Laboratory, P.O. Box 1625, MS 2208, Idaho Falls, ID 83415

Much knowledge has been developed in the past few decades regarding fundamental biogeochemical processes of importance to environmental issues such as contaminant remediation. Quantitative models of biogeochemical reaction systems are based on constituent concentration as the primary dependent variable, which requires assumptions involving scales of averaging and mixing. At laboratory scales, complete mixing and homogeneity conditions can be (and usually are) enforced and resulting theories are conditioned on those assumptions. However, at field scales physical, chemical and biological heterogeneity and incomplete mixing are the rule rather than the exception. Several examples from recent research, including experiments and simulations ranging from pore to field scales, will be presented to illustrate these issues and identify possible solutions. These examples include a combined field- and laboratory-scale study of bacterial transport, a field study of metals bioremediation in a highly heterogeneous aquifer, and pore- to continuum-scale simulations of coupled flow and mineral precipitation reactions.

2006 Philadelphia Annual Meeting (2225 October 2006)
General Information for this Meeting
Session No. 40
Innovations in Characterizing Physical and Chemical Heterogeneity in Sedimentary Aquifers
Pennsylvania Convention Center: 103 B
1:30 PM-5:30 PM, Sunday, 22 October 2006

Geological Society of America Abstracts with Programs, Vol. 38, No. 7, p. 110

© Copyright 2006 The Geological Society of America (GSA), all rights reserved. Permission is hereby granted to the author(s) of this abstract to reproduce and distribute it freely, for noncommercial purposes. Permission is hereby granted to any individual scientist to download a single copy of this electronic file and reproduce up to 20 paper copies for noncommercial purposes advancing science and education, including classroom use, providing all reproductions include the complete content shown here, including the author information. All other forms of reproduction and/or transmittal are prohibited without written permission from GSA Copyright Permissions.