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Time Domain Electromagnetic (TEM) data collected for the Next Generation Water Observing System (NGWOS) Illinois River Basin (IRB) Program, 2022

Published by U.S. Geological Survey | Department of the Interior | Metadata Last Checked: September 26, 2025 | Last Modified: 20250923
Time domain Electromagnetic (TEM) data were collected at 25 sites in the Illinois River Basin (IRB) to provide geologic data for the Next Generation Water Observing System (NGWOS) IRB program. Data were collected by two teams, each equipped with ABEM WalkTEM2 (https://www.guidelinegeo.com/product/abem-walktem-2/) system. Data were processed and numerically inverted to derive one-dimensional resistivity models using Aarhus SPIA software (https://www.aarhusgeosoftware.dk/aarhus-spia-tem).

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