Towards water content monitoring in the vadose zone from active seismic

Abstract : V P / V S or Poison’s ratio classically permit imaging fluids in rocks but this strategy remains underused in near- surface applications, hence in hydrogeophysics. Yet, P-wave refraction tomography and surface-wave dispersion inversion can be combined to produce 2D V P and V S sections from a single acquisition set up. This approach recently proved to be efficient in the study of various hydrosystems and in the imaging of the Critical Zone. We now suggest its time-lapse application in order to help the monitoring of water content in the vadose zone/aquifer continuum. With both laboratory experiments and field data, we show how the temporal variations of P-wave travel times and surface-wave dispersion are strongly associated to the variations of water content observed locally, thus encouraging to exploit the full wealth of seismic signals in hydrogeophysics.
Type de document :
Poster
European Geosciences Union General Assembly 2017, Apr 2017, Vienne, Austria. Geophysical Research Abstracts, 19, pp.EGU2017-13355, 2017
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https://hal-insu.archives-ouvertes.fr/insu-01534138
Contributeur : Isabelle Dubigeon <>
Soumis le : mercredi 7 juin 2017 - 11:50:41
Dernière modification le : mercredi 19 septembre 2018 - 01:26:31

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  • HAL Id : insu-01534138, version 1

Citation

Ludovic Bodet, Marine Dangeard, Sylvain Pasquet, Roger Guerin, Damien Jougnot, et al.. Towards water content monitoring in the vadose zone from active seismic. European Geosciences Union General Assembly 2017, Apr 2017, Vienne, Austria. Geophysical Research Abstracts, 19, pp.EGU2017-13355, 2017. 〈insu-01534138〉

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