HR: 08:30h
AN: B51F-03    [Abstracts]
TI: Experimental investigation of the link between geophysical signatures and biogeochemical properties and processes: experimental design, data collection and interpretation
AU: * Versteeg, R J
EM: versrj@Inel.gov
AF: INEEL, PO Box 1625, Idaho Falls, ID 83415 United States
AU: Blackwelder, B
EM: blacdb@inel.gov
AF: INEEL, PO Box 1625, Idaho Falls, ID 83415 United States
AU: Radtke, C
EM: radtcw@inel.gov
AF: INEEL, PO Box 1625, Idaho Falls, ID 83415 United States
AU: Silverman, H
EM: silvhg@inel.gov
AF: INEEL, PO Box 1625, Idaho Falls, ID 83415 United States
AB: Recent research indicates a correlation between geophysical data from a number of electrical methods (resistivity, induced polarization and self potential) and subsurface biogeochemical properties and processes. Thus, the hope is that electrical measurements will provide proxy indicators of the macroscopic changes in hydraulic and biogeochemical subsurface properties resulting from microbial activity at contaminated sites. A significant problem in making the link is the limited availability of well controlled three dimensional datasets: while field data is three dimensional, it provides little control, whereas most laboratory results are obtained from column experiments. We will report on out approach to highly controlled and automated experiments. In these experiments electrical geophysical data (SP and IP data) is being collected simultaneously and automatically with point measurement of aqueous geochemistry for both 2D and 3D environments. Integrated experimental control and data management for such experiment is critical as it allows transparent and reproducible acquisition and analysis, both of which are essential to build up baseline data for quantitative and qualitative correlation of geophysical data to biogeochemical properties and processes.
DE: 9805 Instruments useful in three or more fields
DE: 5194 Instruments and techniques
DE: 1894 Instruments and techniques
DE: 0400 Biogeosciences
SC: Biogeosciences [B]
MN: 2004 AGU Fall Meeting