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Author Zhao, Q.; Su, X.; Gan, Y.
Title Hydrogeochemical and isotopic study of the origins of groundwater salinization in the deep confined aquifer of northern Yangtze River Type Journal Article
Year 2019 Publication E3S Web Conf. Abbreviated Journal
Volume 98 Issue (up) Pages 07034
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Call Number THL @ christoph.kuells @ Zhao2019 Serial 180
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Author Petelet-Giraud, E.; Négrel, P.; Aunay, B.; Ladouche, B.; Bailly-Comte, V.; Guerrot, C.; Flehoc, C.; Pezard, P.; Lofi, J.; Dörfliger, N.
Title Coastal groundwater salinization: Focus on the vertical variability in a multi-layered aquifer through a multi-isotope fingerprinting (Roussillon Basin, France) Type Journal Article
Year 2016 Publication Science of The Total Environment Abbreviated Journal
Volume 566-567 Issue (up) Pages 398-415
Keywords Groundwater salinization, Coastal aquifer, Roussillon Basin, Isotopes, Westbay System, Barcarès and Canet sites
Abstract The Roussillon sedimentary Basin (South France) is a complex multi-layered aquifer, close to the Mediterranean Sea facing seasonally increases of water abstraction and salinization issues. We report geochemical and isotopic vertical variability in this aquifer using groundwater sampled with a Westbay System® at two coastal monitoring sites: Barcarès and Canet. The Westbay sampling allows pointing out and explaining the variation of water quality along vertical profiles, both in productive layers and in the less permeable ones where most of the chemical processes are susceptible to take place. The aquifer layers are not equally impacted by salinization, with electrical conductivity ranging from 460 to 43,000μS·cm−1. The δ2H–δ18O signatures show mixing between seawater and freshwater components with long water residence time as evidenced by the lack of contribution from modern water using 3H, 14C and CFCs/SF6. S(SO4) isotopes also evidence seawater contribution but some signatures can be related to oxidation of pyrite and/or organically bounded S. In the upper layers 87Sr/86Sr ratios are close to that of seawater and then increase with depth, reflecting water–rock interaction with argillaceous formations while punctual low values reflect interaction with carbonate. Boron isotopes highlight secondary processes such as adsorption/desorption onto clays in addition to mixings. At the Barcarès site (120m deep), the high salinity in some layers appear to be related neither to present day seawater intrusion, nor to Salses-Leucate lagoonwater intrusion. Groundwater chemical composition thus highlights binary mixing between fresh groundwater and inherited salty water together with cation exchange processes, water–rock interactions and, locally, sedimentary organic matter mineralisation probably enhanced by pyrite oxidation. Finally, combining the results of this study and those of Caballero and Ladouche (2015), we discuss the possible future evolution of this aquifer system under global change, as well as the potential management strategies needed to preserve quantitatively and qualitatively this water resource.
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ISSN 0048-9697 ISBN Medium
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Call Number THL @ christoph.kuells @ Peteletgiraud2016398 Serial 181
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Author Carreira, P. M.; Marques, J. M.
Title Groundwater Salinity and Environmental Change Over the Last 20,000 Years: Isotopic Evidences in the Lower Sado Aquifer Recharge, Portugal Type Book Whole
Year 2018 Publication Abbreviated Journal
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Abstract Impacts of the Water Resources Variability on Cereal Yields in the Region of Souss-Massa Southern MoroccoErstes
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Publisher Springer Place of Publication Editor
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Call Number THL @ christoph.kuells @ Serial 183
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Author Löhnert, E.P.; Sonntag, C.
Title Grundwasserversalzungen im Raum Hamburg im Licht neuer Isotopendaten Type Journal Article
Year 1981 Publication Zeitschrift der Deutschen Geologischen Gesellschaft Abbreviated Journal
Volume 132 Issue (up) Pages 559-574
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Publisher Schweizerbart Science Publishers Place of Publication Stuttgart, Germany Editor
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Call Number THL @ christoph.kuells @ Loehhnert1981 Serial 185
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Author Nisi, B.; Raco B.; Dotsika, E.
Title Groundwater Contamination Studies by Environmental Isotopes: A review Type Book Chapter
Year 2014 Publication Environment, Energy and Climate Change I: Environmental Chemistry of Pollutants and Wastes Abbreviated Journal
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Publisher Springer-Verlag Berlin Heidelberg Place of Publication Editor E. Jimenez
Language en Summary Language Original Title
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Call Number THL @ christoph.kuells @ Serial 186
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