Airborne electromagnetic, magnetic, and radiometric surveys of the Mississippi Alluvial Plain and Chicot Aquifer System, March 2018 and May - August 2021

Dates

Publication Date: 2024-04-29
Start Date: 2018-03-06
End Date: 2021-08-07

Citation

Burton, B.L., Adams, R.F., Minsley, B.J., Pace, M.D.M., Kress, W.H., Rigby, J.R., and Bussell, A.M., 2024, Airborne electromagnetic, magnetic, and radiometric surveys of the Mississippi Alluvial Plain and Chicot Aquifer System, March 2018 and May - August 2021: U.S. Geological Survey data release, https://doi.org/10.5066/P9KPK3UJ.

Summary

Airborne geophysical surveys were acquired in March 2018 and May 25 through August 7, 2021 using a helicopter-based platform. These surveys were collected along 10,706 line-kilometers (line-km) within selected areas of the Mississippi Alluvial Plain (MAP) and the Chicot Aquifer System in the southeastern United States. The airborne geophysical surveys include electromagnetic, magnetic, and radiometric sensor data collected in rivers and levees throughout the two areas to evaluate groundwater and surface-water interaction, riverine ecosystems, and infrastructure. This data release contains three child items that provide: Minimally processed (raw) data supplied by the airborne contractor (Xcalibur Multiphysics) for all three sensors [...]

Summary

Airborne geophysical surveys were acquired in March 2018 and May 25 through August 7, 2021 using a helicopter-based platform. These surveys were collected along 10,706 line-kilometers (line-km) within selected areas of the Mississippi Alluvial Plain (MAP) and the Chicot Aquifer System in the southeastern United States. The airborne geophysical surveys include electromagnetic, magnetic, and radiometric sensor data collected in rivers and levees throughout the two areas to evaluate groundwater and surface-water interaction, riverine ecosystems, and infrastructure.

This data release contains three child items that provide:

Minimally processed (raw) data supplied by the airborne contractor (Xcalibur Multiphysics) for all three sensors along all flight lines: Airborne electromagnetic, magnetic, and radiometric surveys of the Mississippi Alluvial Plain and Chicot Aquifer System, March 2018 and May - August 2021: Raw Data
Fully processed electromagnetic data: Airborne electromagnetic, magnetic, and radiometric surveys of the Mississippi Alluvial Plain and Chicot Aquifer System, March 2018 and May - August 2021: Processed Data
Final inverted resistivity models: Airborne electromagnetic, magnetic, and radiometric surveys of the Mississippi Alluvial Plain and Chicot Aquifer System, March 2018 and May - August 2021: Resistivity Models

Supporting documentation contained in this data release include:

Contractor's report- Description of data acquisition and minimal processing as conducted by Xcalibur Multiphysics (Airborne Survey Contractor).

Organization:
The data files contained in this release are broken up according to the three main objectives of these surveys: 1) River surveys along the thalweg of major rivers within the MAP and the Chicot Aquifer extents; 2) Levee surveys along the Mississippi and Arkansas rivers from Cairo, IL to Baton Rouge, LA and northwest from the confluence of the Mississippi and Arkansas rivers to Pine Bluff, AR; and 3) Gridded products focused on gravel bars within the Mississippi River from Helena, MS to the confluence with the Arkansas River.

Data were collected on the following 16 rivers:

Rivers within the MAP boundary: Black, White, Big Sunflower, Little Sunflower, Ouachita, Tensas, Obion, Saline, Little Red, and Bogue Phalia.
Rivers within the Chicot Aquifer extent: Mermentau, Calcasieu, Sabine, Vermillion, Bayou Teche, and Bayou Lacassine.

Levee Surveys:
Along selected reaches of the Mississippi and Arkansas Rivers, levee survey lines were flown along the toe of the levee both on the side adjacent to the river and on the side opposite the river. In addition, where possible, a third line was flown 91m (300 feet) offset from the toe of the levee opposite to the river. Additional processing was done on all levee lines and is described in the data dictionaries and processing step sections of the metadata included in the “Processed Data” and “Resistivity Models” child items of this data release.

Seven gridded surveys were also collected:

Mississippi River gravel bars:
- 250 m Line Spacing
  - Prairie Point
  - Island 63
  - Crumrod
- 100 m Line Spacing
  - White River
Melton Grid:23 line-km at a 100 m line spacing over a site near Minter City, MS.
AR OSL Grid: 268 line-km at a 500 m spacing over a series of the drill core locations near Paragould, AR.
Raccourci Grid:100 line-km at variable spacings over Raccourci Old River, a relic oxbow near Batchelor, LA.

Additional Data:
A dataset collected on levees near Greenville, Mississippi, in March 2018 is also included in this data release. The survey includes four lines parallel to and over the levee for a total of 27 line-km. This dataset was collected as an evaluation of the technical approach used on the more comprehensive surveys in the MAP and Chicot Aquifer extents. This dataset contains AEM data only (magnetic and radiometric data were not collected).

Additional details on flight line numbers and citations for the various methods used in the collection and processing of the radiometric data are included in the supplemental section.

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Contacts

Point of Contact :: Burke J Minsley
Originator :: Bethany L Burton, Ryan F Adams, Burke J Minsley, Michael D Pace, Wade H Kress, James R Rigby, Ashley M Bussell
Metadata Contact :: Burke J Minsley
Publisher :: U.S. Geological Survey
Distributor :: U.S. Geological Survey - ScienceBase
SDC Data Owner :: Geology, Geophysics, and Geochemistry Science Center, Lower Mississippi-Gulf Water Science Center
USGS Mission Area :: Water Resources

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MAP_RiversResolve_2021_FlightLines.xml Original FGDC Metadata	View	22.02 KB	application/fgdc+xml

Shapefile: MAP_RiversResolve_2021_FlightLines.zip
MAP_RiversResolve_2021_FlightLines.cpg		5 Bytes
MAP_RiversResolve_2021_FlightLines.dbf		9.24 KB
MAP_RiversResolve_2021_FlightLines.prj		460 Bytes
MAP_RiversResolve_2021_FlightLines.sbn		5.71 KB
MAP_RiversResolve_2021_FlightLines.sbx		500 Bytes
MAP_RiversResolve_2021_FlightLines.shp		65.62 MB
MAP_RiversResolve_2021_FlightLines.shx		4.4 KB

Shapefile: MAP_GreenvilleLeveeResolve_2018_FlightLines.zip
MAP_GreenvilleLeveeResolve_2018_FlightLines.cpg		5 Bytes
MAP_GreenvilleLeveeResolve_2018_FlightLines.dbf		110 Bytes
MAP_GreenvilleLeveeResolve_2018_FlightLines.prj		417 Bytes
MAP_GreenvilleLeveeResolve_2018_FlightLines.sbn		156 Bytes
MAP_GreenvilleLeveeResolve_2018_FlightLines.sbx		116 Bytes
MAP_GreenvilleLeveeResolve_2018_FlightLines.shp		160.44 KB
MAP_GreenvilleLeveeResolve_2018_FlightLines.shx		132 Bytes

Purpose

These data were collected to contribute high-resolution information about subsurface geologic structure that will be used to inform hydrologic models, water resource infrastructure studies, and local decision making concerning the Mississippi River Valley alluvial aquifer.

Airborne electromagnetic, magnetic, and radiometric surveys of the Mississippi Alluvial Plain and Chicot Aquifer System, March 2018 and May - August 2021

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