Geophysical data from the unnamed lake at the National Crude Oil Spill Fate and Natural Attenuation Research Site, Bemidji, MN (ver. 3.0, May 2022)
Dates
Start Date
2018-06-25
Publication Date
2019-03-13
Revision
2020-06-05
Revision
2022-05-03
Citation
Terry, N., Bekins, B. A., Trost, J. J., Woda, J., and Day-Lewis, F. D., 2019, Geophysical data from the unnamed lake at the National Crude Oil Spill Fate and Natural Attenuation Research Site, Bemidji, MN (ver. 3.0, May 2022): U.S. Geological Survey data release, https://doi.org/10.5066/P9BLZPJT.
Summary
The National Crude Oil Spill Fate and Natural Attenuation Research Site is located near Bemidji, MN, USA. A high-pressure oil pipeline ruptured in 1979 releasing ~1.7 million liters of light crude oil, which sprayed over an area of ~6500 square meters and collected in topographic depressions. Approximately 75% of the spilled oil was recovered. Much of the remainder reached the water table, where it is distributed into three residual oil bodies (the north, middle, and south oil pools). Groundwater flows east-northeast toward a small lake roughly 300 m downgradient from the original spill site. Secondary reactions of sediments with byproducts from anaerobic degradation of the oil plumes cause increases in total dissolved solids, which [...]
Summary
The National Crude Oil Spill Fate and Natural Attenuation Research Site is located near Bemidji, MN, USA. A high-pressure oil pipeline ruptured in 1979 releasing ~1.7 million liters of light crude oil, which sprayed over an area of ~6500 square meters and collected in topographic depressions. Approximately 75% of the spilled oil was recovered. Much of the remainder reached the water table, where it is distributed into three residual oil bodies (the north, middle, and south oil pools). Groundwater flows east-northeast toward a small lake roughly 300 m downgradient from the original spill site. Secondary reactions of sediments with byproducts from anaerobic degradation of the oil plumes cause increases in total dissolved solids, which are transported in groundwater and raise the electrical conductivity of the groundwater above background levels, presenting a potential monitoring target for electrical geophysical methods. This data release contains electromagnetic induction (EMI), ground penetrating radar (GPR), electrical resistivity tomography (ERT), and specific conductance (SpC) data collected over and within the lake where it is believed high SpC groundwater associated with degradation of the oil plume is discharging. Direct measurements of lake sediment specific conductance and temperature, as well as pore water specific conductance, are also included. The current release (ver. 3.0) contains data from 2018, 2019, and 2021. Previous versions of this data release contained only data from 2018 (version 1.0), and data from 2018 and 2019 (version 2.0). The interested user can contact Neil Terry (nterry@usgs.gov) or the USGS Hydrogeophysics Branch to obtain a copy of the original release. A revision history is also included on this root page.
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Metadata_main.xml Original FGDC Metadata
View
13.35 KB
application/fgdc+xml
FDEM.zip
41.83 MB
application/zip
DirectSampling.zip
134.69 KB
application/zip
ERT.zip
117.49 KB
application/zip
revision_history.txt
2.85 KB
text/plain
GPR.zip
791.92 MB
application/zip
thumb_3year.jpg
1.4 MB
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README.txt
771 Bytes
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Purpose
Elevated groundwater specific conductance is associated with increased total dissolved solids resulting from biodegradation of oil in the subsurface. The waterborne electromagnetic induction data and supporting datasets collected at the Bemidji field site were used to assess belowground areas with elevated specific conductance and determine likely pathways for discharge to surface water at the National Crude Oil Spill Fate and Natural Attenuation Research Site.