A close-up view of a heat-pulse flow-meter tool. The tool is used to determine the vertical flow-rate of ground water in boreholes at the site. This information is used to determine the hydraulic properties of fractures during ambient and pumping conditions.
Geophysical methods are developed and used to characterize and monitor environmental properties that influence or affect the transport and fate of contaminants in the environment. Emphasis is placed on providing increasingly quantitative spatial and temporal information about subsurface structure and the distribution of contaminants. The tools are used by environmental professionals to more efficiently characterize and manage contaminated sites.
Science Feature Articles
Investigations and Research Activities
- Improved vertical streambed flux estimation using multiple diurnal temperature methods in series: Irvine, D.J., Briggs, M.A., Cartwright, I., Scruggs, C.R., and Lautz, L.K., 2016, Groundwater, doi:10.1111/gwat.12436 (Advanced Web release).
- A fractured rock geophysical toolbox method selection tool: Day-Lewis, F.D., Johnson, C.D., Slater, L.D., Robinson, J.L., Williams, J.H., Boyden, C.L., Werkema, D., and Lane, J.W., 2016, Groundwater - Technology Spotlight, v. 54, no. 3, p. 315-316, doi:10.1111/gwat.12397 (More information on the FRGT-MST tool).
- Non-invasive flow path characterization in a mining-impacted wetland: Bethune, J., Randell, J., Runkel, R.L., and Singha, K., 2015, Journal of Contaminant Hydrology, v. 183, p. 29-39, doi:10.1016/j.jconhyd.2015.10.002.
- A physical explanation for the development of redox microzones in hyporheic flow: Briggs, M.A., Day-Lewis, F.D., Zarnetske, J.P., and Harvey, J.W., 2015, Geophysical Research Letters, v. 42, no. 11, p. 4402-4410, doi:10.1002/2015GL064200.
- 1DTempPro V.2--New features for parameter estimation, heterogeneity, and time-varying exchange: Koch, F.W., Voytek, E.B., Day-Lewis, F.D., Healy, R., M.A., B., Lane, J.W., and Werkema, D., 2015, Groundwater, doi:10.1111/gwat.12369 (Advanced Web release).
USGS scientists conducting a ground penetrating radar (GPR) survey at the south subsurface oil pool at the Bemidji, MN, Crude Oil Spill Research Site.
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