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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 | Catalog Last Checked: May 05, 2026 at 08:00 PM | Dataset Last Updated: September 23, 2025 at 12:00 AM
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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