Multi-scale Characterization and Prediction of Coupled Subsurface Biogeochemical-Hydrological Processes Page: 4 of 5
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Desulfovibrio vulgaris with injection of dissolved Fe(JJ)) indicates that an excess of sulfate is
reduced relative to the available lactate that is injected as an electron donor. This implies that
acetate is being used as an electron donor in some fashion. The most likely explanation involves
the use of acetate plus CO2 as the carbon source and H2 (present in the anaerobic chamber) and
sulfate as the energy source (Badziong et al., 1979), since Desulfovibrio vulgaris is not known to
use acetate directly as an energy source. Research associated with the iteration between reaction
transport predictions and geophysical monitoring of transformations will be presented at the Fall
2006 meeting (Hubbard et al., 2006).
3. Planned Activities. All five research areas will be advanced during the next year of the
project Flow-through laboratory column experiments will be performed using rifle sediments and
groundwater to explore the accuracy to which geophysical methods can be used to accurately
indicate transformations important at the Rifle site. After pumping tests are completed,
quantitative estimation of hydraulic conductivity will be performed using field-scale
tomographic data using previously developed Bayesian approaches. We will continue to
investigate the relationships between geophysical and biogeochemical properties using
theoretical and experimental approaches. The estimation framework will be completed and tested
using both laboratory and field-scale data. Finally, the reactive transport model will be further
tested using the new column experiments, and prediction responses will be compared with
geophysical monitoring estimates obtained using the estimation framework. The objective is to
advance all components to the point where they can be used together during the final year of the
project to predict, monitor, and validate field-scale transformations associated with field-scale
Several postdocs/students will join our team during the second year of this project.
Postdoc Arash Massoudieh (from UC Davis, TR Ginn, advisor) will work closely with Carl
Steefel on the reactive transport modeling component, Postdoc Andreas Englert (from the
Forschungszentrum Julich Laboratory in Germany) will work closely with Susan Hubbard on the
estimation component, and Michael O'Brian (Rutgers) will work closely with Lee Slater on
development of an advanced electrical petrophysical model.
4. Information Access. References for journal papers, book chapters, and abstracts (including
several invited presentations) supported through this project are listed below. Additional information is
available through http://esd.lbl.gov/sshubbard/monitoring.html and through the program website
Journal Papers (published, in press, in preparation)
1. Scheibe, T., Y. Fang, C.J. Murray, E. E. Roden, J. Chen, Y. Chien, S.C. Brooks, S. S. Hubbard,
Transport and biogeochemical reactions of metals in a and chemically heterogeneous aquifer,
Geosphere, 2(4), 220-245, doi: 10.1130/GES00029.1, 2006.
2. Kowalsky, M.B., S. Finsterle, J. Peterson, S. Hubbard, Y. Rubin, E. Majer, A. Ward, and G. Gee,
Estimation of field-scale soil hydraulic and dielectric parameters through joint inversion of GPR and
hydrological data, Water Resources Research, v. 41, W11425, doi: 10.1029/2005WRR004237, 2005.
3. Linde, H., S. Finsterle, and S. Hubbard, 2006 Inversion of hydrological tracer test data using
tomographic constraints, Water Resources Research, v. 42, W04410, doi: 10.1029/2004WR003806,
4. Kowalsky, M.B., J. Chen, and S.S. Hubbard, Joint inversion of geophysical and hydrological data for
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Hubbard, Susan; Williams, Ken; Steefel, Carl; Banfield, Jill; Long, Phil; Slater, Lee et al. Multi-scale Characterization and Prediction of Coupled Subsurface Biogeochemical-Hydrological Processes, report, June 1, 2006; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc883197/m1/4/: accessed November 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.