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Title of paper Multidimensional Interpretation of Controlled-Source Radio-Magnetotelluric (CSRMT) of a waste-site in Cologne, Germany
List of authors Fadavi Asghari, S., Shlykov, A., Smirnova, M., Saraev, A., Yogeshwar, P., and Tezkan, B.
Affiliation(s) Institute of Geophysics and Meteorology, University of Cologne; Institute of Earth Sciences, St. Petersburg State University; Institute of Geophysics and Meteorology, University of Cologne; Institute of Earth Sciences, St. Petersburg State University; Institute of Geophysics and Meteorology, University of Cologne; Institute of Geophysics and Meteorology, University of Cologne.
Summary Radio-Magnetotelluric (RMT) method is based on measurements of the electromagnetic (EM) field using military and civilian radio transmitters broadcasting in a frequency range between 10 to 1000 kHz as the source. In order to reach to higher signal to noise ratio and a deeper penetration depth, CSRMT measurements are performed using a controlled-source in a wider frequency range of 1 to 1000 kHz. We accomplished a dense CSRMT survey over a waste-site in Cologne, Germany. The site was used as sand and gravel pit from 1940s to the 1950s. The aim of the CSRMT survey is to detect the boundary and the basement of the waste body and possibly any signature of contamination leakage to the deeper subsurface. Two perpendicular transmitters, each 265 and 580 meters long, were set-up to obtain the full impedance tensor and the tipper elements. In order to validate the far-field condition, RMT measurements were also carried out with the transmitters switched off. The RMT and CSRMT data acquired in this field experiment, were processed and the corresponding apparent resistivity, phase and tipper were calculated. In general, we image a high conductive waste body extending to a maximum depth of 15 m. The CSRMT results, are in a good agreement with former DCR results that are obtained from the same region indicating the reliability of the data acquisition, processing and inversion.
Session Keyword 3.0 Exploration, Monitoring and Hazards
File upload 3.0_multidimensional_interpre_fadavi_asghari.pdf
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