BOYER , Daniel

The karstic system of th e 'Fontaine de Vaucluse' has been investigated for many years to get a better understanding of its global functioning. Yet, until now, the Unsaturated Zone (UZ) of this aquifer has been studied indirectly. With the access to the UZ provided by the galleries of the Low-Noise Underground Laboratory of Rustrel in France...

A tomographic P-wave velocity model is inferred from a ground level-to-gallery vertical 500 m × 800 m seismic experiment conducted at the inter-Disciplinary Underground Science and Technology Laboratory (LSBB, France). No initial knowledge of the velocity structure of the surrounding fractured-porous carbonates was previously available....

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In the last few years, the performance of the cryogenic gravity instruments has been further improved by the development of a new generation of superconducting gravimeter (SG): the so-called iOSG which is a superconducting gravimeter designed for observatory purpose with a heavier sphere than previous SGs. The first iOSG (iOSG-024) has been...

Les systèmes karstiques renferment d'importantes ressources en eau. Du fait de leurs complexités, ils sont généralement sous exploités. Le fonctionnement hydrodynamique et hydrochimique de leur zone non saturée est particulièrement mal connu même si un rôle important lui est accordé. Il apparaît donc nécessaire de progresser dans la...

We investigated the microbiology of a shallow subsurface site, the LSBB, located near Avignon. This site lies in carbonate rocks, belonging to the Urgonian facies. Rock, concrete and water samples were collected and directly transferred to the laboratory. Studies of microorganisms as pure cultures are the only way to get their real...

A full polarization parameter system in 3D space is presented to characterize the state of polarization of a seismic wavefield and to parametrize any type of elliptical polarized seismic wave including extreme linear and circular polarizations. This parameter system does not require the a-priori knowledge of the orientation of the polarization...

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The study of karstic systems is mainly based on hydrodynamic and hydrochemical data collected at system inlets (rainfall) and outlets (springs). Indeed, some complementary data base coming from speleological and hydrogeological explorations of natural cavities exist. However, they are not completely representative of all the types of flows....

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