EDUCATION Ph.D. Hydrogeology, Dept. of Geological & Environmental Sciences, Stanford University, 1/2001B.S. Hydrology, Summa Cum Laude, Dept. of Earth Sciences, University of New Hampshire, 12/1994B.A. ...
Carole Johnson is a hydrologist with the Hydrogeophysics Branch of the USGS Water Resources Mission Area Earth System Processes Division. Carole provides leadership to USGS hydrologists nationally on development and application of hydrogeophysical methods to groundwater studies through applied research, training, and policy development.
The field site is located at the Brandywine Defense Reutilization and Marketing Office, an inactive U.S. Department of Defense facility in Maryland. The site is on the U.S. Environmental Protection Agency's National Priorities List (NPL) for PCB-contaminated soil and volatile organic compounds in the ground water.
Four wells were installed for use in conducting borehole radar tomography at the study area. The radar data will be used to help characterize the hydrogeology of the site and to inform analysis and interpretation of other geophysical data collected during monitoring.
Project concept map. Field data are automatically collected and uploaded to remote server. At the server, data are checked, managed, and processed. Project scientists can view the data and results online anytime, from anywhere. Based on the results, they may modify the data collection and processing activities as needed
Relationship between amendment injections, biological activity, and geophysical signatures. Amendments and biological activity result in changes to redox conditions, fluid chemistry, and hydraulic properties. These properties have geophysical signatures that can be monitored using radar, induced polarization (IP), self potential (SP), and...
Schematic diagram of the conceptual model for rate-limited mass transfer (RLMT), where the porous medium is represented by a bicontinuum. Diagram presents a porous medium representative elementary volume (REV), separated into the mobile and immobile domains.