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<title lang=en>Absolute gravity monitoring of water storage variation in a karst aquifer on the larzac plateau (Southern France)</title>
<creator>Jacob, Thomas</creator>
<creator>Bayer, Roger</creator>
<creator>Chery, Jean</creator>
<creator>Jourde, H.</creator>
<creator>Le Moigne, Nicolas</creator>
<creator>Boy, J. P.</creator>
<creator>Hinderer, J.</creator>
<creator>Luck, B.</creator>
<creator>Brunet, P.</creator>
<contributor>Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Hydrosciences Montpellier (HSM) ; Institut de Recherche pour le Développement (IRD) - Université Montpellier 2 - Sciences et Techniques (UM2) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Institut de physique du globe de Strasbourg (IPGS) ; Institut national des sciences de l'Univers (INSU - CNRS) - Université Louis Pasteur - Strasbourg I - Centre National de la Recherche Scientifique (CNRS)</contributor>
<description>TAG LITHO</description>
<source>ISSN: 0022-1694</source>
<source>Journal of Hydrology</source>
<publisher>Elsevier</publisher>
<identifier>hal-00411884</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00411884</identifier>
<source>https://hal.archives-ouvertes.fr/hal-00411884</source>
<source>Journal of Hydrology, Elsevier, 2008, 359 (1-2), pp.105-117. 〈10.1016/j.jhydrol.2008.06.020〉</source>
<identifier>DOI : 10.1016/j.jhydrol.2008.06.020</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jhydrol.2008.06.020</relation>
<language>en</language>
<subject lang=en>karst aquifers</subject>
<subject lang=en>geodesy</subject>
<subject lang=en>absolute gravity</subject>
<subject lang=en>water storage variation</subject>
<subject lang=en>superconducting gravimeter system</subject>
<subject lang=en>deformation</subject>
<subject lang=en>hydrology</subject>
<subject lang=en>model</subject>
<subject>[SDU.STU.HY] Sciences of the Universe [physics]/Earth Sciences/Hydrology</subject>
<subject>[SDU.STU.GP] Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph]</subject>
<subject>[PHYS.PHYS.PHYS-GEO-PH] Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph]</subject>
<subject>[SDE.MCG] Environmental Sciences/Global Changes</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>In this study we attempt to understand the water storage variations in a karst aquifer on the Larzac Plateau (South of France) using absolute gravimetry. On this karst system, water input is exclusively rainfall and draining occurs at the Durzon perennial spring in a karstic valley. Our basis assumption is that water storage in the vadose zone (epikarst and infiltration zone) has a significant effect on surface gravity through Newtonian attraction. The karst aquifer is hence being monitored since January 2006 with monthly absolute gravity measurements at three sites. The gravity measurements are corrected for regional scale gravity using water storage models in order to obtain gravity variations related exclusively to the local water storage variations. The gravity variations exhibit an important seasonal component (10-15 mu gal corresponding to a variation of equivalent water stab thickness of similar to 24-36 cm). Water storage variation seen by gravimetry is not spatially uniform on the studied karst system, corroborating current geomorphologic observations and interpretations. Finally, we use a global mass balance consideration linking rainfall, evapotranspiration and spring discharge to provide a conceptual framework for the understanding of observed gravity variations.</description>
<date>2008</date>
</dc>
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