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Proceedings Paper

Processing and inversion of multi-offset and multi-azimuth GPR data for environmental and engineering applications
Author(s): M. Pipan; E. Forte; I. Finetti
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Paper Abstract

We apply linear and azimuthal multi-fold GPR techniques to study waste disposal sites and areas scheduled for quarry and civil engineering operations. Linear (single azimuth, multiple offsets) and azimuthal (multiple azimuths and offsets) multi-fold GPR data were obtained at four sites with maximum 6000% and 24000% fold for the linear and azimuthal datasets respectively. Pre-stack depth imaging of waste disposal sites provided detailed 3-D reconstructions of soil-waste and waste bedrock contacts. Post-stack migration algorithms successfully imaged quarry and building sites in limestone. Synthetic datasets, obtained by considering homogeneous and isotropic half-spaces, frequency dependent electrical properties of the media and by taking into account attenuation and dispersion effects, were compared with Common Mid Point (CMP) gathers to evaluate properties of subsurface materials. Soil-waste and rock-waste contacts, bedding j oints, fractures, cavities and filling materials in limestone were successfully imaged by migrated multi-fold data over 70% of the surveyed area. Results of processing and inversion of GPR data were calibrated by boreholes, excavations and inspections of outcrops and rock faces. An average 2% accuracy was attained in joint mapping at quarry and building sites, where field-synthetic data comparison was exploited to discriminate air/sediments- filled joints and cavities

Paper Details

Date Published: 12 April 2002
PDF: 6 pages
Proc. SPIE 4758, Ninth International Conference on Ground Penetrating Radar, (12 April 2002); doi: 10.1117/12.462273
Show Author Affiliations
M. Pipan, Univ. of Trieste (Italy)
E. Forte, Univ. of Trieste (Italy)
I. Finetti, Univ. of Trieste (Italy)

Published in SPIE Proceedings Vol. 4758:
Ninth International Conference on Ground Penetrating Radar
Steven Koppenjan; Hua Lee, Editor(s)

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