4 results on '"Gardes, Thomas"'
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2. Key factors influencing metal concentrations in sediments along Western European Rivers: A long-term monitoring study (1945–2020)
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Dendievel, André Marie, Grosbois, Cécile, Ayrault, Sophie, Evrard, Olivier, Coynel, Alexandra, Debret, Maxime, Gardes, Thomas, Euzen, Cassandra, Schmitt, Laurent, Chabaux, François, Winiarski, Thierry, Van Der Perk, Marcel, Mourier, Brice, Geomorfologie, Coastal dynamics, Fluvial systems and Global change, Équipe 5 - Impact des Aménagements et des Polluants sur les HYdrosystèmes (IAPHY), Laboratoire d'Ecologie des Hydrosystèmes Naturels et Anthropisés (LEHNA), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Nationale des Travaux Publics de l'État (ENTPE)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Nationale des Travaux Publics de l'État (ENTPE)-Centre National de la Recherche Scientifique (CNRS), GéoHydrosystèmes COntinentaux (GéHCO EA6293), Université de Tours (UT), Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Géochimie Des Impacts (GEDI), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), UMR 5805 Environnements et Paléoenvironnements Océaniques et Continentaux (EPOC), Observatoire aquitain des sciences de l'univers (OASU), Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Morphodynamique Continentale et Côtière (M2C), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Image, Ville, Environnement (LIVE), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Institut Terre Environnement Strasbourg (ITES), École Nationale du Génie de l'Eau et de l'Environnement de Strasbourg (ENGEES)-Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Department of Physical Geography [Utrecht], Utrecht University [Utrecht], Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Environnements et Paléoenvironnements OCéaniques (EPOC), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École Pratique des Hautes Études (EPHE), The French Office of Biodiversity (OFB) supported the INTERPOL project in charge of INTERcomparison of sediment POLlution on the main French rivers. It involves researchers from five public research laboratories in France: the LEHNA-IAPHY team (UMR CNRS 5023) on the Rhône River, the EPOC lab on the Garonne Basin (UMR CNRS 5805), the GéHCO lab on the Loire Basin (EA 6293), the LSCE team (UMR CEA/CNRS/UVSQ 8212) and the M2C team from Rouen (UMR CNRS 6143) on the Seine River., Geomorfologie, Coastal dynamics, Fluvial systems and Global change, and Université de Tours
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Geologic Sediments ,Environmental Engineering ,010504 meteorology & atmospheric sciences ,Lithology ,010501 environmental sciences ,Trace metals River sediment Suspended particulate matter Sediment core Analytical procedures Spatio-temporal trends ,01 natural sciences ,Rivers ,Analytical procedures ,Trace metals ,Metals, Heavy ,Analytical procedure ,Environmental Chemistry ,Extraction (military) ,[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment ,Waste Management and Disposal ,0105 earth and related environmental sciences ,Hydrology ,[SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere ,Flood myth ,River sediment ,Sediment ,Suspended particulate matter ,Particulates ,Contamination ,Spatio-temporal trends ,Pollution ,6. Clean water ,Sediment core ,Water Framework Directive ,Wastewater ,13. Climate action ,[SDE]Environmental Sciences ,Environmental science ,Water Pollutants, Chemical ,Environmental Monitoring - Abstract
International audience; Since 1945, a large amount of heterogeneous data has been acquired to survey river sediment quality, especially concerning regulatory metals such as Cd, Cr, Cu, Hg, Ni, Pb, and Zn. Large-scale syntheses are critical to assess the effectiveness of public regulations and the resiliency of the river systems. Accordingly, this data synthesis pro- poses a first attempt to decipher spatio-temporal trends of metal contamination along seven major continental rivers in Western Europe (France, Belgium, Germany, and the Netherlands). A large dataset (>12,000 samples) from various sediment matrices (bed and flood deposits – BFD, suspended particulate matter – SPM, dated sedi- ment cores – DSC) was set up based on monitoring and scientific research from the 1950s to the 2010s. This work investigates the impact of analytical protocols (matrix sampling, fractionation, extraction), location and time fac- tors (related to geology and anthropogenic activities) on metal concentration trends. Statistical analyses high- light crossed-interactions in space and time, as well as between sediment matrices (metal concentrations in SPM ≃ DSC > BFD) and extraction procedures (also related to river lithology). Major spatio-temporal trends are found along several rivers such as (i) an increase of metal concentrations downstream of the main urban in- dustrial areas (e.g. Paris-Rouen corridor on the Seine River, Bonn-Duisburg corridor on the Rhine River), (ii) a long-term influence of former mining areas located in crystalline zones, releasing heavily contaminated sedi- ments for decades (Upper Loire River, Middle Meuse section), (iii) a decrease of metal concentrations since the 1970s (except for Cr and Ni, rather low and stable over time). The improvement of sediment quality in the most recent years in Europe reflects a decisive role of environment policies, such as more efficient wastewater treat- ments, local applications of the Water Framework Directive and urban industrial changes in the river valleys.
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- 2022
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3. Spatio-temporal assessment of the polychlorinated biphenyl (PCB) sediment contamination in four major French river corridors (1945–2018).
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Dendievel, André-Marie, Mourier, Brice, Coynel, Alexandra, Evrard, Olivier, Labadie, Pierre, Ayrault, Sophie, Debret, Maxime, Koltalo, Florence, Copard, Yoann, Faivre, Quentin, Gardes, Thomas, Vauclin, Sophia, Budzinski, Hélène, Grosbois, Cécile, Winiarski, Thierry, and Desmet, Marc
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POLYCHLORINATED biphenyls ,DIPHENYL ,SEDIMENT analysis ,RIVERS ,ROBUST control ,PORT districts - Abstract
Environmental pollution by polychlorinated biphenyls (PCBs) is a key cause for concern about river quality because of their low degradation rates leading to their accumulation in sediments and living organisms. An original interdisciplinary work was conducted along the four main French rivers (Seine, Rhône, Loire and Garonne rivers), which flow into major European seas. We completed a dataset based on sediment analyses provided by monitoring agencies, port authorities and research teams on different solid matrices (sediment cores, bed and flood deposits, suspended particulate matter and dredged sediments). This dataset focused on the seven indicator PCBs and their sum (Σ PCBi) from 1945 to 2018 (nΣ PCBi =1416). Special effort was put into the quality control to provide robust spatio-temporal information. Taking into account hydrological and human drivers, we outlined two main pollution trends: (1) from 1945 to 1975, a quick increase in Σ PCBi (up to 4 mg kg -1 dry weight, dw) and a sharp decrease in the 1980s on the Seine and Loire rivers and (2) increasing but moderate Σ PCBi levels (50 to 150 µgkg-1dw) followed by a decline after the 1990s on the Rhône and Garonne rivers. In addition to these patterns, PCB emissions from urban and industrial areas or accidental events were significant in each river. Finally, when calculating specific flux, the Rhône exhibited the uppermost Σ PCBi load (up to 12 µgm-2yr-1 in 1977–1987), at least 25 % higher than those of the Seine and Loire rivers, while the Garonne showed a very low flux. In western Europe, we confirmed that the Rhône, Seine and Loire rivers contribute significantly to the PCB contamination of the seas, while French specific Σ PCBi fluxes are 2 orders of magnitude lower than those found in American or Asian rivers. The dataset is available at 10.1594/PANGAEA.904277 (Dendievel et al., 2019). [ABSTRACT FROM AUTHOR]
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- 2020
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4. Reconstruction of anthropogenic activities in legacy sediments from the Eure River, a major tributary of the Seine Estuary (France).
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Gardes, Thomas, Debret, Maxime, Copard, Yoann, Patault, Edouard, Winiarski, Thierry, Develle, Anne-Lise, Sabatier, Pierre, Dendievel, André-Marie, Mourier, Brice, Marcotte, Stéphane, Leroy, Barbara, and Portet-Koltalo, Florence
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TRACE metals , *ESTUARIES , *SEDIMENTS , *RIVERS , *HUMAN ecology , *COASTAL sediments - Abstract
• The industrial trajectory of the Eure River was reconstructed from sediment cores. • High levels of Zn, Cu, and Ni were recorded in the 1950s and the 1960s. • High levels of Pb were recorded in the 1990s and the 2000s. • The history of Pb is linked to the activities of a CRT production site. • Results showed that a resilience period is necessary for the system. Most rivers worldwide are contaminated by various trace metals from different origins, which may be stored for considerable periods of time in depositional areas. Most of these studies are focused on the main river of a watershed and the tributaries are often neglected which can be important sources of contamination. The aim of this study was to reconstruct the anthropogenic activities that occurred in the Eure River, tributary of the Seine Estuary, since the 1940s using "legacy sediments". The results showed that the temporal trends of trace metals were not related to detrital inputs and TOC variations but with the industrial history of the Eure River watershed. The high levels of Zn, Cu, and Ni during the 1950s and the 1960s, and the decrease with the decline of the probable main source of release showed the watershed reactivity to anthropogenic activities. The high levels of Pb during the 1990s and the 2000s showed that the watershed reacted immediately to anthropogenic pressures. The Pb levels remained important after the cease of industrial activity, showing that a resilience period is necessary for the system, and that interactions between human activities and the environment go beyond of the activities themselves. [ABSTRACT FROM AUTHOR]
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- 2020
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