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Electromagnetic induction (EMI) data

Jim Woodruff Lock and Dam, Chattahoochee, Florida, March 2018

Dates

Publication Date
Start Date
2018-03-09
End Date
2018-03-20

Citation

Burton, B.L., Hunter, L.E., Glover, M.T., Jackson, J.M., and Long, C., 2021, Electrical and electromagnetic geophysical surveys at Jim Woodruff Lock and Dam, Chattahoochee, Florida, March 2018: U.S. Geological Survey data release, https://doi.org/10.5066/P9FLKJKK.

Summary

Surface electrical resistivity tomography (ERT), electromagnetic induction (EMI), and self-potential (SP) data were acquired March 9 - 20, 2018 by the U.S. Geological Survey, in collaboration with the U.S. Army Corps of Engineers, at the Jim Woodruff Lock and Dam near Chattahoochee, Florida. Frequency-domain electromagnetic induction data were acquired along approximately 9 line-kilometers with the Geophex GEM-2 system to map variations in structure up to about 10 m in depth. This data release includes the raw and processed frequency-dependent in-phase and quadrature data. They are provided as digital data, and data fields are defined in the data dictionary. Jim Woodruff Lock and Dam is located on the Apalachicola River just [...]

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Attached Files

Click on title to download individual files attached to this item.

JWD_2018_EMI_DataDictionary.csv
“Description of digital data”
3.93 KB text/csv
JWD_2018_EMI_Data.csv
“Raw and processed electromagnetic induction data”
22.9 MB text/csv
Shapefile: JWD_2018_EMIlines.zip
JWD_2018_EMIlines.cpg 9 Bytes
JWD_2018_EMIlines.dbf 1,006 Bytes
JWD_2018_EMIlines.prj 450 Bytes
JWD_2018_EMIlines.sbn 580 Bytes
JWD_2018_EMIlines.sbx 148 Bytes
JWD_2018_EMIlines.shp 93.7 KB
JWD_2018_EMIlines.shx 476 Bytes

Purpose

These surface data were collected to contribute high-resolution information about subsurface geologic structure related to possible karstic features immediately downstream and along the right abutment of the concrete spillway of Jim Woodruff Lock and Dam, Chattahoochee, Florida.

Additional Information

Shapefile Extension

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