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<title lang=en>Neotectonics and current hydrologically-induced karst deformation. Case study of the Plateau de Carlern (Alpes-Maritimes, France)</title>
<creator>Gilli, Eric</creator>
<creator>Boudin, Frédérick</creator>
<creator>Longuevergne, Laurent</creator>
<creator>Florsch, Nicolas</creator>
<creator>Walsch, J.J.</creator>
<creator>Gomez, Alain</creator>
<creator>Depeyre, Jacques</creator>
<creator>Marie, J.C.</creator>
<contributor>Études des Structures, des Processus d’Adaptation et des Changements de l’Espace (ESPACE) ; Aix Marseille Université (AMU) - Université d'Avignon et des Pays de Vaucluse (UAPV) - Université Côte d'Azur (UCA) - Université Nice Sophia Antipolis (UNS) ; Université Côte d'Azur (UCA) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<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>Structure et fonctionnement des systèmes hydriques continentaux (SISYPHE) ; Université Pierre et Marie Curie - Paris 6 (UPMC) - École pratique des hautes études (EPHE) - MINES ParisTech - École nationale supérieure des mines de Paris - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Laboratoire Gemini (LG) ; Institut national des sciences de l'Univers (INSU - CNRS) - Observatoire de la Côte d'Azur - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>CAF ; Club Alpin Français</contributor>
<description>International audience</description>
<source>ISSN: 0985-3111</source>
<source>Geodinamica Acta</source>
<publisher>Taylor & Francis</publisher>
<identifier>hal-00708116</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00708116</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00708116/document</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00708116/file/2010_Geodinamica_Calern_final.pdf</identifier>
<source>https://hal.archives-ouvertes.fr/hal-00708116</source>
<source>Geodinamica Acta, Taylor & Francis, 2010, 23 (1-3), pp.49-64. 〈10.3166/ga.23.49-64〉</source>
<identifier>BIBCODE : 10.3166/ga.23.49-64</identifier>
<identifier>DOI : 10.3166/ga.23.49-64</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.3166/ga.23.49-64</relation>
<language>en</language>
<subject lang=en>hydrology</subject>
<subject lang=en>tilt</subject>
<subject lang=en>Karst</subject>
<subject lang=en>geodesy</subject>
<subject lang=en>tectonics</subject>
<subject>[SDU.STU] Sciences of the Universe [physics]/Earth Sciences</subject>
<subject>[SDE.MCG] Environmental Sciences/Global Changes</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>The astronomical and geodetic observatory OCA, located on the karst plateau of Calern (Caussols, France), has been monitoring earth deformation for several years. Two long baseline tiltmeters have been installed in a shaft in 2007, along with classical hydrogeological monitoring tools in order to investigate the relationship between current karst deformation and hydrology. Dye tests have shown that the plateau is drained towards the East, to the spring of Bramafam, except for its Western third. Karst tilting, as recorded by the tiltmeters, is linked to rainfall events. These instruments bring additional information to characterize different reservoirs: the deep karst aquifer of Bramafan with high amplitude oscillations of its water table, up to 100 m, the perched aquifer of Moustiques shaft whose response is attenuated, and several slope aquifers with reduced oscillations (Fontaniers, Castel Bon Pré). Tilt deformation reaches 8 μrad with a definite orientation between N90°E and N100°E. The best correlation between hydrology and tilts is observed for the deep aquifers. If the first autumn rainfall is ineffective on tilt, it recharges the epikarst and refills the reserves. The winter rains cause the water to flush towards the eastern deep aquifer and provokes a quick tilting of the plateau. Finally, the long term variations in tilt and water table show a very good correlation The relationship between current hydrological deformations and tectonics is also analyzed; broken and shifted speleothems in the shafts indicate a general shift of the plateau towards the south.</description>
<date>2010</date>
</dc>
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