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Apport de la stratigraphie séquentielle à la gestion et à la modélisation des ressources en eau des aquifères côtiers

Abstract : With the intense economic and demographic development, littoral zones have vital impact on the environment and, in particular, on the water resources. Although coastal groundwater management has many results from scientific research, one of the major problems which remains is the knowledge of the aquifers geometries. Geological interpretations of the Roussillon Plio-Quaternary basin, stemming from sequential stratigraphy, are compared, through a database, with the hydrogeology of this complex hydrosystem located in the coastal areas of Pyrénées-Orientales (France). Statistical study of the abstraction points (screen distribution, logs productivity...), functional analysis (piezometric time series analyses), hydrochemistry and electrical geophysics were used with the aim of building a hydrogeological conceptual model of the onshore / offshore basin scale flows. Sea, residual salinity areas and coastal rivers contribute to the increase in salinity of a superficial Quaternary unconfined aquifer overlying several Pliocene confined aquifers used for drinking water supply of the coastal area. Vulnerability of this good water both in terms of quality and quantity and its intrusion by saline water has been modeled. On the offshore domain, protective function of low and middle permeability layers is highlighted with respect to the safeguarding the quality of drinking water.
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https://tel.archives-ouvertes.fr/tel-00275467
Contributor : Bertrand Aunay <>
Submitted on : Thursday, April 24, 2008 - 7:43:44 AM
Last modification on : Friday, October 23, 2020 - 4:47:51 PM
Long-term archiving on: : Friday, May 28, 2010 - 5:27:26 PM

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  • HAL Id : tel-00275467, version 1

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Bertrand Aunay. Apport de la stratigraphie séquentielle à la gestion et à la modélisation des ressources en eau des aquifères côtiers. Hydrologie. Université Montpellier II - Sciences et Techniques du Languedoc, 2007. Français. ⟨tel-00275467⟩

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