NDLI: 3D characterization of an aquifer using full-waveform inversion and amplitude analysis

Content Provider	IEEE Xplore Digital Library
Author	Klotzsche, A. van der Kruk, J. Linde, N. Doetsch, J.
Copyright Year	2013
Description	Author affiliation: Earth Sci. Div., Lawrence Berkeley Nat. Lab., Berkley, CA, USA (Doetsch, J.) \|\| H. Vereecken Agrosphere (IBG 3), Forschungszentrum Julich, Julich, Germany (Klotzsche, A.; van der Kruk, J.) \|\| Appl. & Environ. Geophys. Group, Univ. of Lausanne, Lausanne, Switzerland (Linde, N.)
Abstract	For accurate prediction of flow and contaminant transport in aquifers, a high resolution method is necessary, that is able to detect small-scale high-contrast layers. Such layers can act as low-velocity waveguides in the GPR signal and can be related to a zone of preferential flow or impermeable clay lenses. Here, we characterize a saturated gravel aquifer in 3D by applying 2D full-waveform inversion and an amplitude analysis approach that explores the information content present in the measured GPR data. The full-waveform inversion results of the permittivity and conductivity show decimeter-scale high resolution images and similar results at the borehole crossing and at the intersection of the diagonal planes. In all six planes, a high permittivity layer between 5m-6m depth was resolved, which acted due to the high contrast to the surrounding as a low-velocity waveguide indicating a zone of higher porosity. The amplitude analysis of the measured data showed significant wave propagation for transmitter located in and outside this zone. By using this information, the method was able to detect the waveguide layers and their boundaries in the measured data, which were confirmed by the full-waveform inversion results. Permeability logs indicate a zone of preferential flow between 5m-6m depth, which shows a good agreement with the high permittivity/porosity zone detected by the full-waveform inversion.
Starting Page	1
Ending Page	4
File Size	707940
Page Count	4
File Format	PDF
ISBN	9781479909377
e-ISBN	9781479909407
DOI	10.1109/IWAGPR.2013.6601519
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-07-02
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Ground penetrating radar Image resolution full-waveform inversion Transmitters Green products low-velocity waveguide Receivers preferential flow path Conductivity GPR Hydrogeophysics Permittivity
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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