NDLI: Incorporating near-surface layering in GPR data inversion for improved surface water content estimates

Content Provider	IEEE Xplore Digital Library
Author	Kooper, K. Lambot, S. Slob, E.C.
Copyright Year	2007
Description	Author affiliation: Department of Geophysics, Utrecht University, The Netherlands, k.kooper@students.uu.nl (Kooper, K.) \|\| Department of Environmental Sciences and Land Use Planning, Université catholique de Louvain, Belgium; ICGIV Agrosphere, Forschungszentrum Jülich GmbH, Germany; Department of Geotechnology, Delft University of Technology, The Netherlands, lambot@geru.ucl.ac.be (Lambot, S.) \|\| e.c.slob@citg.tudelft.nl (Slob, E.C.)
Abstract	We analyze the retrieval of soil surface dielectric permittivity in presence of shallow dielectric contrasts using full-wave inversion of off-ground monostatic ground-penetrating radar (GPR) data. Shallow soil layers affect the surface reflection and lead to constructive or destructive interferences which result, respectively, in overestimated and underestimated surface dielectric permittivity values. Synthetic GPR Green's functions were generated for a series of model configurations with different contrasts and different layer thicknesses. Green's function inversions were then performed to retrieve the initial parameters and analyze the sensitivity of the different parameters in the inverse problem. Two global optimization algorithms were used and compared, namely, a genetic algorithm and the multilevel coordinate search. The results showed that, depending on the contrast and layer thickness, it is not always possible to identify the original soil model. This depends in particular on the width of the frequency range. Both algorithms led to comparable results and did not converge properly in all cases, given their standard parameterization. Yet, the proposed method appears to be promising to improve real-time mapping of surface water content using off-ground GPR and full-wave inversion.
Starting Page	85
Ending Page	90
File Size	3411504
Page Count	6
File Format	PDF
ISBN	1424408865
DOI	10.1109/AGPR.2007.386530
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-06-27
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Ground penetrating radar Soil Dielectrics Permittivity Green's function methods Information retrieval Reflection Interference Performance analysis Inverse problems surface water content Ground-penetrating radar inverse modeling soil electric properties soil layering
Content Type	Text
Resource Type	Article

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