Journal Article

FZJ-2018-04945

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png RADIUS ESTIMATION OF SUBSURFACE CYLINDRICAL OBJECT FROM GPR DATA USING FULL-WAVEFORM INVERSION

Liu, T.FZJ* ; Klotzsche, A.FZJ* ; Pondkule, M.FZJ* ; Vereecken, H.FZJ* ; Su, Y. (Corresponding author) ; van der Kruk, J.FZJ*

2018
SEG Tulsa, Okla.

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Please use a persistent id in citations: http://hdl.handle.net/2128/19788  doi:10.1190/geo2017-0815.1

Abstract: Ray-based radius estimations of subsurface cylindrical objects such as rebars and pipes from ground-penetrating-radar (GPR) measurements are not accurate because of their approximations. We have developed a novel full-waveform inversion (FWI) approach that uses a full-waveform 3D finite-difference time-domain (FDTD) forward-modeling program to estimate the radius including other object parameters. By using the full waveform of the common-offset GPR data, the shuffled complex evolution (SCE) approach is able to reliably extract the radius of the subsurface cylindrical objects. A combined optimization of radius, medium properties, and the effective source wavelet is necessary. Synthetic and experimental data inversion returns an accurate reconstruction of the cylinder properties, medium properties, and the effective source wavelet. Combining FWI of GPR data using SCE and a 3D FDTD forward model makes the approach easily adaptable for a wide range of other GPR FWI approaches.

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Contributing Institute(s):

1. Agrosphäre (IBG-3)

Research Program(s):

1. 255 - Terrestrial Systems: From Observation to Prediction (POF3-255) (POF3-255)

Appears in the scientific report 2018

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Database coverage:
; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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