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Tomographie radar en milieux stratifié à fort contrastes de vitesse

Abstract : Ground penetrating radar is often used for the characterization of subsurface properties such as the water-content. We have developed an algorithm for cross-well tomographic inversion of GPR first-arrival traveltimes. It is based on a blocky description of the propagation medium, and only a limited number of parameters are inversed. This methodology has been developed for media with significant contrast of electrical permittivity. In a first step, the distribution of the electromagnetic wave velocity is determined between two wells. In a second step, we address the question of the layers continuity for several successive tomographic panels. This methodology allows us to obtain a 2D velocity profile of the medium between successive pairs of wells. This inversion scheme takes into account both the direct and refracted waves generated at interfaces with strong velocity contrast. It was tested on synthetic data, and then on real data.
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https://tel.archives-ouvertes.fr/tel-00286583
Contributor : Madeleine Mangué <>
Submitted on : Monday, June 9, 2008 - 7:10:28 PM
Last modification on : Friday, January 15, 2021 - 9:22:20 AM
Long-term archiving on: : Friday, May 28, 2010 - 9:45:30 PM

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  • HAL Id : tel-00286583, version 1

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Madeleine Mangué. Tomographie radar en milieux stratifié à fort contrastes de vitesse. Géophysique [physics.geo-ph]. Université de Pau et des Pays de l'Adour, 2008. Français. ⟨tel-00286583⟩

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