title: Spatiotemporal variation of dissolved (238)U in the Gironde fluvial-estuarine system (France).
abstract: Dissolved uranium ((238)U(D)) was measured within the Gironde fluvial-estuarine system (France), which is well known for its heavy metal pollution and its subsequent environmental effects. Dissolved (238)U activities exhibit the highest levels and variability in the small watersheds of the Isle and Riou-Mort rivers, ascribed to low discharges and the occurrence of peculiar features (local U ore deposits; Permian layers). The major tributaries of the Gironde Estuary: Garonne, Lot and Dordogne, show rather stable (238)U(D), higher than the global mean riverine uranium activity. In the Gironde Estuary (238)U(D) behaves conservatively along the river-estuary-ocean transect. Dissolved (238)U distribution in the Gironde fluvial-estuarine system can be explained by the characteristics of considered drainage basins. There is no evidence of anthropogenic pollution.
authors.affiliation: UMR CNRS 5805 Environnements et Paléoenvironnements Océaniques, Université Bordeaux 1, Avenue des Facultés, 33405 Talence Cedex, France. hk.saari@epoc.u-bordeaux1.fr
authors.forename: Hanna-Kaisa
authors.initials: HK
authors.lastname: Saari
authors.forename: Sabine
authors.initials: S
authors.lastname: Schmidt
authors.forename: Stéphanie
authors.initials: S
authors.lastname: Huguet
authors.forename: Aurélie
authors.initials: A
authors.lastname: Lanoux
mesh_terms: D005602:France; D012995:Solubility; D014501:Uranium / Q000032:analysis*; D014875:Water Pollutants, Radioactive / Q000032:analysis*
chemical_list: D014875:Water Pollutants, Radioactive; D014501:Uranium