Valorisation

2D characterization of near-surface VP/VS: surface-wave dispersion inversion versus refraction tomography

The joint study of pressure (P-) and shear (S-) wave velocities (VP and VS), as well as their ratio (VP/VS), has been used for many years at large scales but remains marginal in near-surface applications. For these applications, VP and VS are generally retrieved with seismic refraction tomography combining P and SH (shear-horizontal) waves, thus requiring two separate acquisitions. Surface-wave […]

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Publications, WP6 ,

Contribution of the finite volume point dilution method for measurement of groundwater fluxes in a fractured aquifer

Measurement of groundwater fluxes is the basis of all hydrogeological study, from hydraulic characterization to the most advanced reactive transport modeling. Usual groundwater flux estimation with Darcy’s law may lead to cumulated errors on spatial variability, especially in fractured aquifers where local direct measurement of groundwater fluxes becomes necessary. In the present study, both classical point dilution method (PDM) and […]

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Publications, WP7 , ,

Inferring field-scale properties of a fractured aquifer from ground surface deformation during a well test

Papers - Publications scientifiques

Fractured aquifers which bear valuable water resources are often difficult to characterize  with classical hydrogeological tools due to their intrinsic heterogeneities. Here we implement ground surface deformation tools (tiltmetry and optical leveling) to monitor groundwater pressure changes induced by a classical hydraulic test at the Ploemeur observatory. By jointly analyzing complementary time constraining data (tilt) and spatially constraining data (vertical […]

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Publications, WP2 , ,

Contribution of Magnetic Resonance Soundings for characterizing water storage in the unsaturated zone of karst aquifers

Understanding the role of the unsaturated zone in aquifer recharge and contaminant attenuation processes is a major challenge for the protection and management of karstic water resources. We present the potential of the MRS (Magnetic Resonance Soundings) geophysical method for characterizing the vadose zone of karst aquifers composed of epikarst and infiltration layers. To investigate the hydraulic functioning of the Durzon karst system located […]

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Équipements, Publications, WP6 , , , , , ,

Permanent electrical resistivity measurements for monitoring water circulation in clayey landslides

Papers - Publications scientifiques

Landslides developed on clay-rich slopes are controlled by the soilwater regimeand the groundwater circulation. Spatially-distributed and high frequency observations of these hydrological processes are important for improving our understanding and prediction of landslide triggering. This work presents observed changes in electrical resistivity monitored at the Super-Sauze clayey landslide with the GEOMON 4D resistivity instrument installed permanently on-site for a period of one year. A […]

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Publications, WP4 , , , ,

The Earth’s Critical Zone, Geochemistry of the Earth’s Surface meeting, GES – 10

The next Geochemistry of the Earth’s Surface meeting (GES 10) will be held in the center of Paris, France, between August 18th and 22nd, 2014. GES 10 will emphasize Critical Zone cutting edge research at all scales, from the elementary processes to global biogeochemical cycles. The GES meeting is a small-size, friendly meeting (< 200 attendees) featuring a limited number […]

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Publications , ,

Kick off meeting, 2012, Paris

Les 29 et 30 octobre 2012, le kick off meeting de CRITEX s’est tenu à Paris. Les participants au projet CRITEX se sont retrouvés deux jours pour le lancements du projet qui s’est réalisé à travers les présentations des différents acteurs (tutelles, workpackages, réseaux d’observatoires) et des discussions au sujet des prochaines étapes du projet.     Programme Book Rapport  

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Rapports internes, Réunions annuelles CRITEX
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