Multi-scale Characterization and Prediction of Coupled Subsurface Biogeochemical-Hydrological Processes

Hubbard, Susan ; Williams, Ken ; Steefel, Carl ; Banfield, Jill ; Long, Phil ; Slater, Lee ; Pride, Steve ; Chen, Jinsong

Lawrence Berkeley National Laboratory

关键词: Sulfates;    Forecasting;    59 Basic Biological Sciences;    Denitrification;    Radar;   

DOI  :  10.2172/895884
RP-ID  :  ERSD-1027674-2006
RP-ID  :  None
RP-ID  :  895884

美国|英语

来源: UNT Digital Library

【 摘 要 】

To advance solutions needed for remediation of DOE contaminated sites, approaches are needed that can elucidate and predict reactions associated with coupled biological, geochemical, and hydrological processes over a variety of spatial scales and in heterogeneous environments. Our previous laboratory experimental experiments, which were conducted under controlled and homogeneous conditions, suggest that geophysical methods have the potential for elucidating system transformations that often occur during remediation. Examples include tracking the onset and aggregation of precipitates associated with sulfate reduction using seismic and complex resistivity methods (Williams et al., 2005; Ntarlagiannis et al., 2005) as well as estimating the volume of evolved gas associated with denitrification using radar velocity. These exciting studies illustrated that geophysical responses correlated with biogeochemical changes, but also that multiple factors could impact the geophysical signature and thus a better understanding as well as integration tools were needed to advance the techniques to the point where they can be used to provide quantitative estimates of system transformations.