Flux de matières en suspension et de cadmium dans le Lot
Yvon Lapaquellerie,Noelle Maillet,J.-M. Jouanneau,J. P. Coakley,Claude Latouche +4 more
- Vol. 8, Iss: 8, pp 173-191
TLDR
In this article, le bilan suffisamment precis des flux de MES a permis d'etablir les flux de cadmium particulaire emis avec une approximation suffisante pour permettre de juger des efforts de rehabilitation du site pollueur.Abstract:
La contamination en cadmium, observee dans les huitres de l'estuaire de la Gironde, provient, principalement par l'intermediaire du Lot, d'une ancienne usine de traitement du minerai de zinc et des metaux qui lui sont associes. Les flux de cadmium principalement expulse sous la forme particulaire sont suivis annuellement depuis 1990. Un des facteurs repose sur la strategie et la methodologie d'echantillonnage. L'important echantillonnage recueilli au niveau des turbidites a permis non seulement d'etablir et de comparer deux methodes de calcul des flux de MES mais aussi de montrer l'importance du regime hydrologique de la riviere en particulier du role des crues quant a la remobilisation des sediments de fonds. Le bilan suffisamment precis des flux de MES a permis d'etablir les flux de cadmium particulaire emis avec une approximation suffisante pour permettre de juger des efforts de rehabilitation du site pollueur.read more
Citations
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Journal ArticleDOI
Long-term survey of heavy-metal pollution, biofilm contamination and diatom community structure in the Riou Mort watershed, South-West France.
Soizic Morin,Thi Thuy Duong,Aymeric Dabrin,Alexandra Coynel,Olivier Herlory,Magalie Baudrimont,François Delmas,Gilles Durrieu,Jörg Schäfer,Peter Winterton,Gérard Blanc,Michel Coste +11 more
TL;DR: In a metal-polluted stream in the Riou Mort watershed in SW France, periphytic diatom communities were affected by the metal but displayed induced tolerance, seen through structural impact (dominance of small, adnate species) as well as morphological abnormalities particularly in the genera Ulnaria and Fragilaria.
Journal ArticleDOI
Anthropogenic components of heavy metal (Cd, Zn, Cu, Pb) budgets in the Lot-Garonne fluvial system (France)
TL;DR: In this paper, the mass balances of heavy metal (Zn, Cd, Cu and Pb) in the Lot-Garonne fluvial system have been established for 1999 and 2000.
Journal ArticleDOI
Ten-year observation of the Gironde tributary fluvial system: fluxes of suspended matter, particulate organic carbon and cadmium
Journal ArticleDOI
Geochemical signals and source contributions to heavy metal (Cd, Zn, Pb, Cu) fluxes into the Gironde Estuary via its major tributaries.
TL;DR: The results suggest that intensive agriculture also considerably influences gross metal fluxes into the Gironde Estuary, and monitoring fluxes and identifying distinct geochemical signals from source areas in heterogeneous watersheds may greatly improve understanding of contaminant transport to the coast.
Journal ArticleDOI
Contamination by Heavy Metals (Cd, Zn, Cu, and Hg) of Eight Fish Species in the Gironde Estuary (France)
TL;DR: Comparisons between the results of this study and four estuaries, on a limited number of common species, metals and fish organs, clearly reveal higher Cd bioaccumulation levels in the Gironde estuary.
References
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Journal ArticleDOI
Cadmium in the gironde fluvioestuarine system: Behaviour and flow
TL;DR: In this paper, a major cadmium contamination of molluscs was discovered in the Gironde estuary and studies were then undertaken on biota and on particulate and dissolved phases.
Journal ArticleDOI
Pollution en Cadmium Dans Les Sédiments du Lot (France) et Calcul du Stock de Polluant Cadmium Pollution in Sediments of the Lot River (France). Estimate of the Mass of Cadmium
TL;DR: In this paper, an estimate of the cadmium stock stored in the bottom sediments of the Lot river has been established in 1991 and the behaviour and the evolution of this metallic concentration has been followed during the 1987-1994 period.
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Comparison of the different methods for the recovery of suspended matter from estuarine waters: Deposition, filtration and centrifugation; Consequences for the determination of some heavy metals
H. Etcheber,J.M. Jouanneau +1 more
TL;DR: In this paper, the authors compared the advantages and disadvantages of the three most common methods of recovery: deposition, filtration and centrifugation used on samples from the Gironde estuary.
Erosion et transport de matières en suspension dans un bassin versant en région agricole. Méthode de mesure du ruissellement superficiel, de sa charge et des deux composantes du transport solide dans un cours d'eau
D Etchanchu,J.-L Probst +1 more
Synthèse des résultats de la surveillance des micropolluants dans la matière vivante en 1979
TL;DR: Au cours de l'annee 1979, la surveillance des niveaux de presence des metaux et micropolluants dans les organismes marins, pratiquee dans le cadre du Reseau national d'Observation, est venue completer les resultats obtenus jusqu'alors dans l'eau de mer and le sediment.