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Development of Electromagnetic Induction Measurement and Inversion Methods for Soil Electrical Conductivity Investigations

X.Tan¹, A.Mester¹, E.Zimmermann¹, J. van der Kruk²

¹Electronic Systems (ZEA-2), ²Agrosphere Institute (IBG-3)

Electromagnetic Induction (EMI) enables a contactless measurement for near surface soil investigations. It has been developed and widely implemented in geophysical or agricultural applications such as terrain mapping, salinity evaluations, clay content and moisture investigations.

Multi-elevation EMI measurementCopyright: Forschungszentrum Jülich GmbH

The configuration of the EMI system is built up with coil loops (transmitter and receiver coils) placing on the surface of the soil or at certain height above the ground. This configuration enables a contactless measurement which leads to a portable and convenient measuring process. This project is focusing on improving the performance and stability of the EMI devices by applying a post-calibration for the measured data and a temperature drift correction during measurements. A custom prototype EMI system, which has the potential to improve the quality and efficiency of such soil investigations, will also be developed in combination with efficient forward models and inversion algorithms.

Magnetic FieldsCopyright: Forschungszentrum Jülich GmbH