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Communication dans un congrès

Large sedimentary aquifer system and sustainable management: investigations of hydrogeological and geochemical variations in Eocene sand aquifer, south western France.

Abstract : In the sedimentary Aquitaine Basin, the Eocene Sand Aquifer system, mostly confined, represents strategic resources for drinking water, irrigation, gas storage and geothermal resources. Therefore, its quantity and quality issues are essential for the sustainable management in this large region that extends over 116,000 km2 (i.e. one-fifth of the French territory). The Eocene Sand Aquifer system comprises at least five aquifers: Paleocene, Eocene infra-molassic sands, early Eocene, middle Eocene, and late Eocene. In the north, because of years of pumping, a trough in the potentiometric surface has been formed. The piezometric decline is roughly one meter per year in the depression centre. In the south, the decline of the water table is roughly half a meter per year. In addition to the quantitative aspect, the quality of waters induces others management difficulties. The geochemical analyses reflect the influence of the lithologies (e.g. carbonates, silicates and evaporites). Coupling hydrogeological, geological and geochemical approaches may help to better understand and constrain management of this complex aquifer system.
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Communication dans un congrès
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https://hal-brgm.archives-ouvertes.fr/hal-00593478
Contributeur : Eline Malcuit <>
Soumis le : lundi 16 mai 2011 - 10:55:31
Dernière modification le : jeudi 23 avril 2020 - 12:00:04
Archivage à long terme le : : mercredi 17 août 2011 - 02:31:14

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  • HAL Id : hal-00593478, version 1

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Eline Malcuit, Philippe Négrel, Emmanuelle Petelet-Giraud, Pierre Durst. Large sedimentary aquifer system and sustainable management: investigations of hydrogeological and geochemical variations in Eocene sand aquifer, south western France.. 2010 AGU Fall Meeting, Dec 2010, San Francisco, United States. ⟨hal-00593478⟩

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