146 results on '"Bonté, Philippe"'
Search Results
2. Occurrence, Sources and Pathways of Antimony and Silver in an Urban Catchment
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Ayrault, Sophie, Priadi, Cindy Rianti, Pape, Pierre Le, Bonté, Philippe, Rauch, Sébastien, editor, Morrison, Gregory, editor, Norra, Stefan, editor, and Schleicher, Nina, editor
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- 2013
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Catalog
3. Environmental mobility of 110mAg: lessons learnt from Fukushima accident (Japan) and potential use for tracking the dispersion of contamination within coastal catchments
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Lepage, Hugo, Evrard, Olivier, Onda, Yuichi, Patin, Jeremy, Chartin, Caroline, Lefèvre, Irène, Bonté, Philippe, and Ayrault, Sophie
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- 2014
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4. Quantifying the resuspension of sediment and associated metallic contaminants with fallout radionuclide measurements in a channelized river draining an industrial catchment
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Zebracki, Mathilde, Alary, Claire, Lefèvre, Irène, Nan-Hammade, Vasilica, Evrard, Olivier, and Bonté, Philippe
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- 2016
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5. Tracking the early dispersion of contaminated sediment along rivers draining the Fukushima radioactive pollution plume
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Chartin, Caroline, Evrard, Olivier, Onda, Yuichi, Patin, Jeremy, Lefèvre, Irène, Ottlé, Catherine, Ayrault, Sophie, Lepage, Hugo, and Bonté, Philippe
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- 2013
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6. Long-term soil carbon loss and accumulation in a catchment following the conversion of forest to arable land in northern Laos
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Huon, Sylvain, de Rouw, Anneke, Bonté, Philippe, Robain, Henri, Valentin, Christian, Lefèvre, Irène, Girardin, Cyril, Le Troquer, Yann, Podwojewski, Pascal, and Sengtaheuanghoung, Oloth
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- 2013
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7. Evidence of the radioactive fallout in France due to the Fukushima nuclear accident
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Evrard, Olivier, Van Beek, Pieter, Gateuille, David, Pont, Véronique, Lefèvre, Irène, Lansard, Bruno, and Bonté, Philippe
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- 2012
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8. Lead contamination of the Seine River, France: Geochemical implications of a historical perspective
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Ayrault, Sophie, Roy-Barman, Matthieu, Le Cloarec, Marie-Françoise, Priadi, Cindy Rianti, Bonté, Philippe, and Göpel, Christa
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- 2012
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9. Sediment dynamics during the rainy season in tropical highland catchments of central Mexico using fallout radionuclides
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Evrard, Olivier, Némery, Julien, Gratiot, Nicolas, Duvert, Clément, Ayrault, Sophie, Lefèvre, Irène, Poulenard, Jérôme, Prat, Christian, Bonté, Philippe, and Esteves, Michel
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- 2010
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10. Caesium-137 in sandy sediments of the River Loire (France): Assessment of an alluvial island evolving over the last 50 years
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Détriché, Sébastien, Rodrigues, Stéphane, Macaire, Jean-Jacques, Bonté, Philippe, Bréhéret, Jean-Gabriel, Bakyono, Jean-Paul, and Jugé, Philippe
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- 2010
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11. Modelling the impact of land use change and rainfall seasonality on sediment export from an agricultural catchment of the northwestern European loess belt
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Evrard, Olivier, Nord, Guillaume, Cerdan, Olivier, Souchère, Véronique, Le Bissonnais, Yves, and Bonté, Philippe
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- 2010
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12. A-horizon dynamics in a historical hedged landscape
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Follain, Stéphane, Walter, Christian, Bonté, Philippe, Marguerie, Dominique, and Lefevre, Irène
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- 2009
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13. Les rivières urbaines et leur pollution
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Airoldi, Riccardo, Ayrault, Sophie, Belliard, Jérôme, Beslagic, Sarah, Bonté, Philippe, Briand, Cyrielle, Brion, Natacha, Carré, Catherine, Cavallin, Angelo, Deligne, Chloé, Euzen, Agathe, Evrard, Olivier, Garnier, Josette, Gozzoli, Andrea, Haghe, Jean-Paul, Kervyn, Matthieu, Kohlbrenner, Ananda, Ledent, Carole, Lefèvre, Irène, Lestel, Laurence, Meybeck, Michel, Mouchel, Jean-Marie, Parmentier, Isabelle, Peracchi, Lucia, Redondi, Pietro, Renders, Daan, Ricchiuti, Michele, Servais, Pierre, Stefani, Fabrizio, Tales, Évelyne, Tartari, Gianni, Viganò, Luigi, Winklhöfer, Karin, Wolter, Christian, Lestel, Laurence, and Carré, Catherine more...
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History ,activité humaine ,Geography ,aménagement du territoire ,eau ,gestion de l'eau ,gestion des risques ,innovation - Abstract
En deux siècles, les rivières traversant les villes européennes sont passées de réceptacle de tous leurs rejets à un milieu aquatique vivant, à préserver et à intégrer à la ville. Pour autant, ce retournement de perspective s’est produit alors que l’urbanisation et l’industrialisation conjointe des villes depuis le XIXe siècle avaient entraîné le sacrifice de leurs rivières. Les quatre métropoles de Bruxelles, Berlin, Milan et Paris ont été choisies car situées sur des rivières ayant un débit faible, voire très faible. Elles ont généré pendant longtemps des pressions telles que le fonctionnement des rivières s’en est trouvé modifié, au point de compromettre la préservation de leurs fonctionnalités. Avec un regard interdisciplinaire —entre écologie, hydrologie et sciences sociales—les auteurs reconstruisent ici la connaissance qu’ont eue les sociétés du fonctionnement de ces rivières, décrivent les techniques de surveillance des cours d’eau et énumèrent les actions menées pour améliorer leur état. Puis ils évaluent l’efficacité des réponses apportées, à travers l’évolution de l’état des rivières et de leurs populations piscicoles, utilisées ici comme traceur des pressions exercées et des réponses du milieu aquatique. Ces études de cas illustrent la diversité des trajectoires des couples ville-rivière et l’absence de causalité entre la connaissance de la qualité des cours d’eau, leur surveillance et les décisions prises. Elles révèlent l’importance des choix politiques pour ces quatre villes —indépendamment des moyens financiers et techniques disponibles— et fournissent un retour d’expérience pour les très grandes villes du monde qui se retrouvent, un siècle plus tard, confrontées aux mêmes défis. more...
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- 2021
14. Chapitre 6 - Intercomparaison : des rivières sous contrôle, mais en quel état ?
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Meybeck, Michel, Lestel, Laurence, Winklhöfer, Karin, Viganò, Luigi, Evrard, Olivier, Bonté, Philippe, Tales, Évelyne, Belliard, Jérôme, Beslagic, Sarah, Stefani, Fabrizio, Tartari, Gianni, Wolter, Christian, and Carré, Catherine more...
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History ,activité humaine ,Geography ,aménagement du territoire ,eau ,gestion de l'eau ,gestion des risques ,innovation - Abstract
Un exemple de trajectoire environnementale : la contamination métallique de la Seine, la Spree, la Senne et le Lambro (1950-2010) Michel Meybeck, Laurence Lestel, Karin Winklhöfer, Luigi Viganò, Olivier Evrard, Philippe Bonté La contamination des rivières par les métaux non ferreux est une préoccupation récente des suivis institutionnels de la qualité des eaux. Avant 1970, les moyens analytiques et les connaissances scie... more...
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- 2021
15. Radionuclide contamination in flood sediment deposits in the coastal rivers draining the main radioactive pollution plume of Fukushima Prefecture, Japan (2011–2020)
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UCL - SST/ELI/ELIC - Earth & Climate, Evrard, Olivier, Chartin, Caroline, Laceby, J. Patrick, Onda, Yuichi, Wakiyama, Yoshifumi, Nakao, Atsushi, Cerdan, Olivier, Lepage, Hugo, Jaegler, Hugo, Vandromme, Rosalie, Lefèvre, Irène, Bonté, Philippe, UCL - SST/ELI/ELIC - Earth & Climate, Evrard, Olivier, Chartin, Caroline, Laceby, J. Patrick, Onda, Yuichi, Wakiyama, Yoshifumi, Nakao, Atsushi, Cerdan, Olivier, Lepage, Hugo, Jaegler, Hugo, Vandromme, Rosalie, Lefèvre, Irène, and Bonté, Philippe more...
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Artificial radionuclides including radiocesium (134Cs and 137Cs) and radiosilver (110mAg) were released into the environment following the Fukushima Dai-ichi nuclear power plant accident in March 2011. These particle-bound substances deposited on soils of north-eastern Japan, located predominantly within a ∼ 3000 km2 radioactive fallout plume and drained by several coastal rivers to the Pacific Ocean. The current dataset (Evrard et al., 2021), which can be accessed at https://doi.org/10.1594/PANGAEA.928594, compiles gamma-emitting artificial radionuclide activities measured in 782 sediment samples collected from 27 to 71 locations across catchments draining ∼ 6450 km2 during 16 fieldwork campaigns. These campaigns were conducted in Japan between November 2011 and November 2020 in river catchments draining the main radioactive plume. This database may be useful to evaluate and anticipate the post-accidental redistribution of radionuclides in the environment and for the spatial validation of models simulating the transfer of radiocesium across continental landscapes. more...
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- 2021
16. Core-derived historical records of suspended sediment origin in a mesoscale mountainous catchment: the River Bléone, French Alps
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Navratil, Oldrich, Evrard, Olivier, Esteves, Michel, Ayrault, Sophie, Lefèvre, Irène, Legout, Cédric, Reyss, Jean-Louis, Gratiot, Nicolas, Nemery, Julien, Mathys, Nicolle, Poirel, Alain, and Bonté, Philippe more...
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- 2012
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17. A 50-year record of quinolone and sulphonamide antimicrobial agents in Seine River sediments
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Tamtam, Fatima, Le Bot, Barbara, Dinh, Tuc, Mompelat, Sophie, Eurin, Joelle, Chevreuil, Marc, Bonté, Philippe, Mouchel, Jean-Marie, and Ayrault, Sophie
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- 2011
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18. Radionuclide contamination in flood sediment deposits in the coastal rivers draining the main radioactive pollution plume of Fukushima Prefecture, Japan (2011–2020)
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Evrard, Olivier, primary, Chartin, Caroline, additional, Laceby, J. Patrick, additional, Onda, Yuichi, additional, Wakiyama, Yoshifumi, additional, Nakao, Atsushi, additional, Cerdan, Olivier, additional, Lepage, Hugo, additional, Jaegler, Hugo, additional, Vandromme, Rosalie, additional, Lefèvre, Irène, additional, and Bonté, Philippe, additional more...
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- 2021
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19. Historical perspective of heavy metals contamination (Cd, Cr, Cu, Hg, Pb, Zn) in the Seine River basin (France) following a DPSIR approach (1950–2005)
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Meybeck, Michel, Lestel, Laurence, Bonté, Philippe, Moilleron, Régis, Colin, Jean Louis, Rousselot, Olivier, Hervé, Daniel, de Pontevès, Claire, Grosbois, Cécile, and Thévenot, Daniel R.
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- 2007
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20. Critical budget of metal sources and pathways in the Seine River basin (1994–2003) for Cd, Cr, Cu, Hg, Ni, Pb and Zn
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Thévenot, Daniel R., Moilleron, Régis, Lestel, Laurence, Gromaire, Marie-Christine, Rocher, Vincent, Cambier, Philippe, Bonté, Philippe, Colin, Jean-Louis, de Pontevès, Claire, and Meybeck, Michel
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- 2007
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21. Distribution of 7Be, 210Pb and 137Cs in watersheds of different scales in the Seine River basin: Inventories and residence times
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Le Cloarec, Marie-Françoise, Bonté, Philippe, Lefèvre, Irène, Mouchel, Jean-Marie, and Colbert, Steven
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- 2007
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22. Temporal variability of suspended sediment sources in an alpine catchment combining river/rainfall monitoring and sediment fingerprinting
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Navratil, Oldrich, Evrard, Olivier, Esteves, Michel, Legout, Cédric, Ayrault, Sophie, Némery, Julien, Mate-Marin, Ainhoa, Ahmadi, Mehdi, Lefèvre, Irène, Poirel, Alain, and Bonté, Philippe
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- 2012
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23. Combining suspended sediment monitoring and fingerprinting to determine the spatial origin of fine sediment in a mountainous river catchment
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Evrard, Olivier, Navratil, Oldrich, Ayrault, Sophie, Ahmadi, Mehdi, Némery, Julien, Legout, Cédric, Lefèvre, Irène, Poirel, Alain, Bonté, Philippe, and Esteves, Michel
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- 2011
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24. Monitoring Soil Organic Carbon Erosion with Isotopic Tracers: Two Case Studies on Cultivated Tropical Catchments with Steep Slopes (Laos, Venezuela)
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Huon, Sylvain, primary, Bellanger, Boris, additional, Bonté, Philippe, additional, Sogon, Stéphane, additional, Podwojewski, Pascal, additional, Girardin, Cyril, additional, Valentin, Christian, additional, de Rouw, Anneke, additional, Velasquez, Fernando, additional, Bricquet, Jean-Pierre, additional, and Mariotti, André, additional more...
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- 2005
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25. Search for the Tunguska event relics in the Antarctic snow and new estimation of the cosmic iridium accretion rate
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Rocchia, Robert, primary, Bonté, Philippe, additional, Jéhanno, Célestine, additional, Robin, Eric, additional, de Angelis, Martine, additional, and Boclet, Daniel, additional
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- 1990
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26. OSL dating of fluvial quartz from Le Closeau, a Late Paleolithic site near Paris — comparison with 14C chronology
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Folz, Elise, Bodu, Pierre, Bonte, Philippe, Joron, Jean-Louis, Mercier, Norbert, and Reyss, Jean-Louis
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- 2001
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27. Fonctionnement hydrosédimentologique du lac Débo
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Diarra, Samuel, Orange, Didier, and Bonté, Philippe
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gestion de l’environnement ,fonctionnement de l’écosystème ,politique de l’environnement ,développement durable ,développement intégré ,plaine inondable ,exploitation des ressources naturelles ,irrigation ,environnement ,milieu deltaïque - Abstract
Le delta intérieur du fleuve Niger est divisé en deux parties géomorphologiquement différentes, par trois lacs centraux connectés les uns aux autres et constituant le premier plan d’eau pérenne rencontré par les eaux. On y trouve à l’ouest, alimenté par le Diakka, le lac Wallado qui débouche dans le lac Débo situé au centre ; ce dernier, le plus grand des trois lacs, reçoit au sud les bras principaux du Niger et est en connexion à l’est avec le lac Korientzé (fig. 1). Véritable mer intérieure... more...
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- 2017
28. Traçage de la dispersion et du stockage des sédiments contaminés par les retombées de l’accident nucléaire de Fukushima dans les bassins versants côtiers japonais
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Evrard, Olivier, Lepage, Hugo, Chartin, Caroline, Laceby, J., Onda, Yuichi, Lefevre, Irène, Ayrault, Sophie, Cerdan, Olivier, Pointurier, Fabien, Hubert, Amélie, Pottin, Anne-Claire, Bonté, Philippe, Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), 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), Géochimie Des Impacts (GEDI), 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), Centre Georges Lemaître for Earth and Climate Research [Louvain] (TECLIM), Earth and Life Institute [Louvain-La-Neuve] (ELI), Université Catholique de Louvain = Catholic University of Louvain (UCL)-Université Catholique de Louvain = Catholic University of Louvain (UCL), Université de Tsukuba = University of Tsukuba, Bureau de Recherches Géologiques et Minières (BRGM) (BRGM), DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), ANR-11-JAPN-0001,TOFU,Traçage des conséquences environnementales du tsunami provoqué par le séisme de TOhoku et de l'accident de FUkushima(2011), ANR-11-RSNR-0002,AMORAD,AMORAD1(2011), 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), and 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) more...
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[SDE]Environmental Sciences ,[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology ,[SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology ,[SDV.SA.SDS]Life Sciences [q-bio]/Agricultural sciences/Soil study ,[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment - Abstract
International audience; L’accident qui a frappé la centrale nucléaire de Fukushima Dai-ichi en mars 2011 a conduit aux rejets de radionucléides les plus importants dans l’environnement depuis l’accident de Tchernobyl. Même si des traces de ces retombées ont été enregistrées dans le monde entier au cours des semaines qui ont suivi l’accident, la majorité des radionucléides qui se sont déposés en milieu continental se sont fixés sur les sols de plusieurs bassins versants côtiers de la Préfecture de Fukushima, au Japon. Les radionucléides les plus problématiques, de par leur activité et leur période radioactive, sont le césium-134 (Cs-134) et le césium-137 (Cs-137). Ces émetteurs gamma présents en abondance dans les sols peuvent en effet conduire à l’irradiation externe des personnes qui y sont exposées. Ils peuvent également être ingérés avec les particules qui les ont fixés par les organismes vivants et conduire à la contamination de la chaîne alimentaire. Les bassins les plus touchés (dont les sols présentaient des activités initiales en Cs-137 comprises entre 100–2000 kBq/m²) occupent une surface de ~ 520 km². Ils drainent les montagnes contaminées et traversent ensuite une plaine côtière relativement épargnée par les retombées radioactives initiales, mais densément peuplée et cultivée, avant de rejoindre l’Océan Pacifique. Dans cet environnement où l’érosion des sols est particulièrement marquée, des archives sédimentaires ont pu être collectées dès les années qui ont suivi l’accident. Les barrages et le chenal endigué des rivières constituent autant de réceptacles potentiels des particules contaminées par les retombées de l’accident. La situation est contrastée entre, d’une part, les barrages où une observe une diminution progressive de la contamination de la base vers le sommet des séquences sédimentaires et, d’autre part, le chenal des rivières où les niveaux de contamination dépendent de la hauteur atteinte par les crues lors des typhons plus ou moins violents qui ont frappé la région depuis 2011.En dépit de son statut de polluant problématique au vu des concentrations qu’il atteint dans l’environnement, le césium-137 n’en reste pas moins un traceur qui permet d’améliorer notre compréhension des transferts sédimentaires dans les bassins versants soumis à la fois à des crues printanières et à des typhons estivaux. Ainsi, l’utilisation de modèles de mélange binaires utilisant la distribution du Cs-137 dans les zones fortement ou, au contraire, peu contaminées par cette substance dans les bassins versants permet de montrer l’importance des lâchers de barrage et du cycle saisonnier des précipitations et des crues pour expliquer le transfert de contamination vers le Pacifique. À l’avenir, la détection d’autres substances comme celle des isotopes du plutonium émis par l’accident de Fukushima et présentant une signature différente de celle des retombées associées aux essais des bombes atmosphériques des années 1960 devrait permettre de continuer à tracer ces apports et de mettre en évidence, le cas échéant, leur arrivée et leur migration dans l’Océan Pacifique. more...
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- 2015
29. Tracking the dispersion of particle-borne radioactive contamination along coastal rivers of Fukushima Prefecture (2011-2014)
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Evrard, Olivier, Onda, Yuichi, Lepage, Hugo, Pointurier, Fabien, Chartin, Caroline, Laceby, J., Pottin, Anne-Claire, Hubert, Amélie, Lefevre, Irène, Ayrault, Sophie, Bonté, Philippe, Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), 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), Géochimie Des Impacts (GEDI), 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 Tsukuba = University of Tsukuba, DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Centre Georges Lemaître for Earth and Climate Research [Louvain] (TECLIM), Earth and Life Institute [Louvain-La-Neuve] (ELI), Université Catholique de Louvain = Catholic University of Louvain (UCL)-Université Catholique de Louvain = Catholic University of Louvain (UCL), Alberta Environment and Parks (AEP), ANR-11-JAPN-0001,TOFU,Traçage des conséquences environnementales du tsunami provoqué par le séisme de TOhoku et de l'accident de FUkushima(2011), ANR-11-RSNR-0002,AMORAD,AMORAD1(2011), 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), and 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) more...
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[SDE]Environmental Sciences ,[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology ,[SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology ,[SDV.SA.SDS]Life Sciences [q-bio]/Agricultural sciences/Soil study ,[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment - Abstract
International audience; The Fukushima Dai-ichi nuclear power plant (FDNPP) accident that occurred in March 2011 led to the formation of a 3000-km² radioactive pollution plume and resulted in the fallout consisting predominantly of of radiocesium ($^{137m}$Cs and $^{134}$Cs) on soils located up to 70 km to the northwest of the damaged site. This mountainous region is drained by several coastal rivers to the Pacific Ocean, and original sediment fingerprinting methods had to be developed to track the dispersion of contaminated sediment across these coastal catchments. Sediment fingerprinting based on the heterogeneous deposition of metastable silver-110 ($^{110m}$Ag) across the investigated catchments was shown to provide relevant information on the dispersion of contaminated sediment. Based on the measurement of the $^{110m}$Ag: $^{137}$Cs activity ratio in soils and river sediment, we demonstrated the occurrence of a seasonal cycle of soil erosion during typhoons followed by sediment export in rivers during the subsequent spring snowmelt in 2011 and 2012. However, due to the rapid decay of $^{110m}$Ag (half-life of 250 days), alternative methods had to be developed to continue tracking sediment from 2013 onwards. We therefore used local ground dose rate and $^{241}$Pu/$^{239}$Pu atom ratio measurements to further document this dispersion. We thereby demonstrated that, although overall sediment contamination decreased two years after the accident, decontamination of paddy fields led to the local supply of contamination to the rivers. Ongoing work is focused on the development of a sediment fingerprinting technique based on geochemical properties characterizing the different soil types found in the region. In future, we expect that the contaminated sediment stored in river channels and reservoirs will represent a significant management challenge for local authorities. more...
- Published
- 2015
30. Tracing the dispersion of contaminated sediment with plutonium isotope measurements in coastal catchments of Fukushima Prefecture
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Evrard, Olivier, Pointurier, Fabien, Onda, Yuichi, Chartin, Caroline, Hubert, Amélie, Lepage, Hugo, Pottin, Anne-Claire, Lefevre, Irène, Bonté, Philippe, Laceby, Patrick, Ayrault, Sophie, Evrard, Olivier, AMORAD1 - - AMORAD2011 - ANR-11-RSNR-0002 - RSNR - VALID, Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), 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), Géochimie Des Impacts (GEDI), 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), DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Université de Tsukuba = University of Tsukuba, Centre Georges Lemaître for Earth and Climate Research [Louvain] (TECLIM), Earth and Life Institute [Louvain-La-Neuve] (ELI), Université Catholique de Louvain = Catholic University of Louvain (UCL)-Université Catholique de Louvain = Catholic University of Louvain (UCL), ANR-11-RSNR-0002,AMORAD,AMORAD1(2011), 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), and 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) more...
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[SDE] Environmental Sciences ,[SDU.STU.GM] Sciences of the Universe [physics]/Earth Sciences/Geomorphology ,[SDE.MCG]Environmental Sciences/Global Changes ,[SDU.ENVI] Sciences of the Universe [physics]/Continental interfaces, environment ,[SDE.MCG] Environmental Sciences/Global Changes ,[SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry ,[SDE]Environmental Sciences ,[CHIM.RADIO] Chemical Sciences/Radiochemistry ,[SDU.STU.GC] Sciences of the Universe [physics]/Earth Sciences/Geochemistry ,[SDU.STU.HY] Sciences of the Universe [physics]/Earth Sciences/Hydrology ,[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology ,[SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology ,[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment ,[CHIM.RADIO]Chemical Sciences/Radiochemistry - Abstract
International audience; The Fukushima Dai-ichi Nuclear Power Plant (FDNPP) accident led to important releases of radionuclides into the environment, and trace levels of plutonium (Pu) were detected in northeastern Japan. However, measurement of Pu isotopic atom and activity ratios is required to differentiate between the contributions of global nuclear test fallout and FDNPP emissions. In this study, we measured Pu isotopic ratios in recently deposited sediments along rivers draining the most contaminated part of the inland radioactive plume. To this end, we carried out a thorough chemical purification and concentration of Pu from sediment samples (5 g dry material) and precise isotopic measurements using a double-focusing sector field ICP-MS. Results showed that the entire range of measured Pu isotopes (i.e. 239Pu, 240Pu, 241Pu, and 242Pu) were detected in all samples, although in extremely low concentrations. The 241Pu/239Pu atom ratios measured in sediment deposits (0.0017-0.0884) were significantly higher than the corresponding values attributed to the global fallout (0.00113±0.00008 on average in the Northern Hemisphere between 31 •-71 • N). The results indicated the presence of Pu from FDNPP, in slight excess compared to the Pu background from global fallout, representing up to ca. 60% of Pu in the analyzed samples. These results demonstrate that this radionuclide has been transported relatively long distances ([U+F07E]45 km) from FDNPP and deposited in rivers representing a potential source of Pu to the ocean. more...
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- 2015
31. Constraining sediment dynamics in rivers using fallout radionuclides: How to move forward from the lessons learnt in catchments of Mexico, Laos and France
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Evrard, Olivier, GATEUILLE, David, Gourdin, Elian, Huon, Sylvain, Nemery, Julien, Gratiot, Nicolas, Lefevre, Irène, Ayrault, Sophie, Bonté, Philippe, Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), 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), Géochimie Des Impacts (GEDI), 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), Biogéochimie et écologie des milieux continentaux (Bioemco), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Université Pierre et Marie Curie - Paris 6 (UPMC)-AgroParisTech-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'étude des transferts en hydrologie et environnement (LTHE), Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS), 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)-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), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut National de la Recherche Agronomique (INRA)-Université Pierre et Marie Curie - Paris 6 (UPMC)-AgroParisTech-Centre National de la Recherche Scientifique (CNRS), Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG), and Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS) more...
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[SDE]Environmental Sciences ,[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology ,[SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology ,[SDV.SA.SDS]Life Sciences [q-bio]/Agricultural sciences/Soil study ,[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment - Abstract
International audience; Land use change (e.g. deforestation, overgrazing, cropping intensification) and the associated acceleration of soil erosion have led to an increase in sediment supply to rivers across the world during the last decades. This degradation leads to important on-site (e.g., decrease in soil fertility) and off-site (e.g., reservoir siltation and water pollution) impacts. In order to better understand the dynamics of sediment in catchments and rivers and to implement efficient mitigation measures, it is necessary to better constrain the pathways of sediment in time and space. Fallout radionuclides characterized by different half-lives and origins (Be-7, Cs-137, and unsupported Pb-210) have proved to provide very useful indications to constrain the transfer times of sediment at various scales (plot, hillslope, small catchment, large basins) and in a range of different environments and climates across the world. However, several limitations were raised regarding the assumptions underpinning the methods used to derive sediment residence time or transport distances. Furthermore, doubts regarding the validity of using those tracers in large rivers and catchments were also put forward in recently published papers. In this study, we provide additional data indicating that the hypotheses underlying the method are meaningful. We also compiled radionuclide data (Be-7, Cs-137, and unsupported Pb-210) measured in ,000 km²) and located in different environments (Central Mexico, Northern Laos, France). The results obtained in the different catchments are compared and reinterpreted, with the specific objective of dealing with the limitation that fresh Be-7 fallout may not label river bank or subsurface material. The results show that providing additional and independent information on the sources delivering sediment to the rivers helps constraining their transit times with the method based on Be-7 and unsupported Pb-210 measurements. Implications of the use of this technique in larger rivers and catchments are discussed. Their contribution to quantify the persistence time of particle-borne contaminants in those riverine systems is specifically addressed. more...
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- 2014
32. Relevance and use of the $^{110m}$: $^{137}$Cs activity ratio for tracking the dispersion of radioactive sediment within Fukushima coastal catchments
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Lepage, Hugo, Evrard, Olivier, Onda, Yuichi, Chartin, Caroline, Lefèvre, Irène, Bonté, Philippe, Ayrault, Sophie, 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), Center for Research in Isotopes and Environmental Dynamics, Université de Tsukuba = University of Tsukuba, ANR-11-RSNR-0002,AMORAD,AMORAD1(2011), 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), and 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) more...
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[SDE.MCG]Environmental Sciences/Global Changes ,[SDE]Environmental Sciences ,[CHIM]Chemical Sciences ,[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology ,[SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology ,[SDV.SA.SDS]Life Sciences [q-bio]/Agricultural sciences/Soil study ,[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment - Abstract
International audience; Large quantities of fallout radionuclides emitted during the Fukushima Dai-ichi Nuclear Power Plant (FDNPP) accident were deposited on Japanese soils, thereby leading to the formation of a 3000 km$^2$ contamination plume. Because they are strongly sorbed by fine particles, those radionuclides are likely to be redistributed by hydrosed-imentary processes across catchments. As Ag-110m: Cs-137 activity ratio showed a variation in soils across the main plume, we investigated the behaviour of Silver-110 metastable (Ag-110m) and compared it to the one of the more documented radiocesium (Cs-137) to check whether this ratio may be used to track the dispersion of contaminated sediment. We analysed soil and sediment drape deposits (i.e. mud drapes deposited on channel bed sand in rivers) within coastal catchments draining the main radioactive pollution plume of Fukushima Prefecture (Japan). Several field experiments were also conducted to document radiosilver behaviour in the terrestrial environment. Results show a similar and low mobility for both elements in soils and a strong affinity with the clay fraction. Measurements conducted on sediment sequences accumulated in reservoirs tend to confirm a comparable migration and deposition of both radionuclides even after their redistribution due to erosion and deposition processes. Use of a simple mixing model based on Ag-110m: Cs-137 activity ratio values in both soil and sediment demonstrated the strong reactivity of catchments to the succession of summer typhoons and spring snowmelt. We identified a two stage sediment export cycle with (1) a partial export of contaminated sediment from inland mountain ranges-exposed initially to the highest radionuclide fallout-to the coastal plains in summer and autumn after the occurrence of violent typhoons, and (2) an amplification of the sediment flush during the spring snowmelt. Our results suggest that this contamination export cycle will continue during the next years or decades as large quantities of contaminated material are being stored in reservoirs of the region. more...
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- 2014
33. Comparing radiation dose rates in soils and riverine sediment to track the dispersion of radioactive contamination in Fukushima coastal rivers
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Evrard, Olivier, Onda, Yuichi, Lepage, Hugo, Chartin, Caroline, Lefèvre, Irène, Cerdan, Olivier, Bonté, Philippe, Ayrault, Sophie, 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), Center for Research in Isotopes and Environmental Dynamics, Université de Tsukuba = University of Tsukuba, Bureau de Recherches Géologiques et Minières (BRGM) (BRGM), 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), and 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) more...
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[SDE.MCG]Environmental Sciences/Global Changes ,[SDE]Environmental Sciences ,[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology ,[SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology ,[SDV.SA.SDS]Life Sciences [q-bio]/Agricultural sciences/Soil study ,[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment - Abstract
International audience; The Fukushima Dai-ichi nuclear power plant (FDNPP) accident that occurred in March 2011 led to the formation of a 3000-km$^2$ radioactive pollution plume on soils located up to 70 km to the northwest of the damaged site. Forests and paddy fields are the dominant land uses in this mountainous region drained to the Pacific Ocean by several rivers that flow across densely inhabited coastal plains. It is then crucial to track the dispersion of radioactive material conveyed by those rivers to estimate the continental supply of radionuclides to the Ocean and to assess redistribution of radioactive sediment in those catchments. Radiations emitted by this contaminated material may indeed lead to an external exposure threat for local populations. As river discharge and sediment concentration data were not available during the first two years that followed the accident, alternative methods had to be developed to track this dispersion. We therefore organized field campaigns every six months and conducted local ground dose rate measurements to estimate whether fresh sediment drape deposits were more or less contaminated compared to local soils. Overall, our results showed that, in those regions exposed to violent typhoons and spring snowmelt, transfers of sediment are massive and episodic, and that they followed a seasonal cycle in 2011-2012. Then, in May 2013, contamination levels measured in sediment found in the upper parts of the catchments were almost systematically lower than the ones measured in nearby soils, whereas their contamination was higher in the coastal plains. This could have indicated a drying-up of the upstream sources of contamination. However, after the violent typhoons that occurred during summer in 2013, dose rates measured in fresh sediment deposits in November 2013 increased again systematically across the region. We thereby suggest that remobilization of contaminated sediment by typhoons and their storage in reservoirs and in coastal sections of the river channels now represent the most crucial issues to protect the local populations and manage the most contaminated catchments. more...
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- 2014
34. Investigating the source of radiocesium contaminated sediment in two Fukushima coastal catchments with sediment tracing techniques
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Lepage, Hugo, primary, Laceby, J. Patrick, additional, Bonté, Philippe, additional, Joron, Jean-Louis, additional, Onda, Yuichi, additional, Lefèvre, Irène, additional, Ayrault, Sophie, additional, and Evrard, Olivier, additional more...
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- 2016
- Full Text
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35. Sediment fingerprinting by using the Ag-110m: Cs-137 ratio along the main rivers draining the Fukushima radioactive pollution plume
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Chartin, Caroline, Evrard, Olivier, Onda, Yuichi, Patin, Jérémy, Lefèvre, Irène, Ayrault, Sophie, Lepage, Hugo, Bonté, Philippe, 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), Center for Research in Isotopes and Environmental Dynamics, Université de Tsukuba = University of Tsukuba, ANR-11-JAPN-0001,TOFU,Traçage des conséquences environnementales du tsunami provoqué par le séisme de TOhoku et de l'accident de FUkushima(2011), 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), Evrard, Olivier, and Great Tohoku Earthquake - Traçage des conséquences environnementales du tsunami provoqué par le séisme de TOhoku et de l'accident de FUkushima - - TOFU2011 - ANR-11-JAPN-0001 - JAPON - VALID more...
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[SDE.MCG] Environmental Sciences/Global Changes ,[SDU.STU.GM] Sciences of the Universe [physics]/Earth Sciences/Geomorphology ,[SDE.MCG]Environmental Sciences/Global Changes ,[SDU.STU.HY] Sciences of the Universe [physics]/Earth Sciences/Hydrology ,[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology ,[SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology ,[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment ,[SDU.ENVI] Sciences of the Universe [physics]/Continental interfaces, environment - Abstract
International audience; During the Fukushima Dai-ichi Nuclear Power Plant (FDNPP) accident, large quantities of radionuclides werereleased into the environment between 12 and 19 March 2011. Even though about 80% of these emissions weretransported offshore and out over the Pacific Ocean, 20% were deposited as wet and dry deposits on soils ofFukushima Prefecture on 15–16 March. In particular, 6.4 PBq of Cs-137 were modeled to have deposited onJapanese soils over a distance of 70 km to the northwest of the Fukushima Dai-ichi nuclear power plant. As mostradionuclides are strongly sorbed by fine particles, and their mineralogical clay and organic matter fractions, theyare likely to be redistributed within the landscape in association with soil and sediment particles transported byerosion processes and runoff. Based on a spatial analysis of the gamma-emitting radionuclides present in theenvironment respectively eight and thirteen months after the accident, we aim to provide a radioactive tracer toinvestigate the temporal evolution of the contaminant dispersion across Fukushima Prefecture.For this purpose, sediments were collected along rivers draining the main contamination plume in FukushimaPrefecture (i.e, Rivers Kutchibuto, Mano, Nitta and Ota) in November 2011 and April 2012.These campaignsdirectly followed the main hydro-sedimentary events that occurred in this region, i.e. the typhoon season (Julyand September-October) and the snowmelt (March 2012). The river sediment activities in gamma-emittingradionuclides were then compared to the initial activities measured in soils provided by the Japanese Ministry ofEducation, Culture, Sport, Science and Technology (MEXT).The initial fallout patterns in 110mAg appeared to differ from those of the main contamination plume de-fined mainly by radiocaesium fallout (i.e. Cs-134+137). The Ag-110m:Cs-137 ratio was then used to tracethe spatial origin of contaminated sediment collected in rivers. Sediments collected within the coastal plain inNovember 2011 were locally composed of 50 to 100% of particles originated from inland mountains rangesthat were exposed to the highest initial radionuclide fallout. Typhoons of the summer 2011 have then largelycontributed to the dispersion of the contamination. In addition, the spatial analysis of river sediment contaminationin April 2012 demonstrates that the spring snowmelt amplified significantly the flush of sediment deposited on theriverbed after the summer typhoons.Consequently, export of contaminated particles appears to be particularly fast in those mountainous catch-ments submitted to a very erosive climate. Our results have then important implications suggesting that coastalrivers may have become a perennial source of radioactive contaminants to the Pacific Ocean off FukushimaPrefecture. more...
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- 2013
36. Assessing sediment connectivity to understand dynamics of contaminated sediment within coastal catchments of Fukushima Prefecture (Japan)
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Chartin, Caroline, Evrard, O., Onda, Yuichi, Ottle, Catherine, Brossoni, Camille, Lefevre, Irène, Lepage, Hugo, Bonté, Philippe, Patin, Jérémy, Ayrault, Sophie, 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), Université de Tsukuba = University of Tsukuba, Modélisation des Surfaces et Interfaces Continentales (MOSAIC), 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), and 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) more...
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[SDE.MCG]Environmental Sciences/Global Changes ,[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology ,[SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology ,[SDV.SA.SDS]Life Sciences [q-bio]/Agricultural sciences/Soil study ,[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment - Abstract
International audience; The Fukushima Dai-ichi Nuclear Power Plant accident has led to the release of large radionuclide quantities (e.g., about 20 PBq of Cs-137 and 200 PBq of I-131) into the atmosphere. About 80% of the release was blown out and over the Pacific Ocean. The remaining 20% of emissions were deposited as wet and dry deposits on soils of Fukushima Prefecture, mainly between 15-16 March. As most radionuclides are strongly sorbed by fine particles, they are likely to be redistributed within the landscape in association with soil and sediment particles transported by runoff and erosion processes. A spatial analysis of Ag-110m:Cs-137 ratio in soils and river sediments provided a way to trace those transfers. This fingerprinting study showed that particles eroded from inland mountain ranges exposed to the highest initial radionuclide fallout were already dispersed along coastal rivers, most likely during summer typhoons and spring snowmelt. Those results suggest that hillslopes and rivers have become a perennial source of radioactive contaminants to the Pacific Ocean off Fukushima Prefecture. This study aims to specify the location and nature of the preferential sources supplying contaminated material to the main rivers draining the Fukushima contamination plume. To this end, important parameters controlling soil erosion and sediment transfers within catchments, i.e. landscape morphology and land use characteristics, were preliminary derived from DEM data and satellite images for the River Mano, Nitta and Ota catchments (ca. 525 km$^2$) draining the most radioactive part of the contamination plume that formed across Fukushima Prefecture. Then, those data were used to compute indices assessing the potential sediment connectivity (i) between hillslopes and rivers and (ii) between hillslopes and catchment outlets. Finally, spatially-distributed values of connectivity indices were confronted to gamma-emitting radionuclide activities (Cs-134, Cs-137 and Ag-110m) measured in riverbed sediment samples collected in November 2011, March 2012 and November 2012 just after the main hydro-sedimentary events that occurred in this region (i.e. summer typhoon and spring snowmelt). Preliminary results show that preferential contamination sources come from areas located near the river valleys, especially cultivated and built-up areas. However, forested zones even located on footslopes and convex settings appear to contribute significantly. Moreover, dams played a crucial role in controlling the contamination export to the Pacific Ocean. Those first results have important implications for the management of contaminated areas and dam reservoirs in the Fukushima Prefecture. more...
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- 2013
37. Impact of land use on soils quality and erosion-sedimentation balance in the Malian cotton zone (case of Bélékoni watershed)
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Diallo, Drissa, Bengaly, Aboubacar, Diarra, Gaiba, Bonté, Philippe, Rapidel, Bruno, and Mahé, Gil
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Rotation culturale ,Type de sol ,F08 - Systèmes et modes de culture ,SOL CULTIVE ,Gossypium hirsutum ,Conservation des sols ,SEDIMENT ,Dégradation du sol ,Sédimentation ,DEGRADATION DU SOL ,Zone climatique ,ANALYSE ISOTOPIQUE ,COTON ,P36 - Érosion, conservation et récupération des sols ,Utilisation des terres ,Plante céréalière ,Érosion ,Impact sur l'environnement ,STOCK ,DENSITE APPARENTE ,CARBONE ,RAPPORT CN ,EROSION HYDRIQUE ,Qualité ,UTILISATION DU SOL - Abstract
Bélékoni watershed (120km2 ) is located in the upper basin of Niger River in Mali. The climate context (Sudanian zone) justify cotton production program. Analysis of last decades agricultural evolution impacts is the objective of the present study. Research methods include in situ observations and measurements and laboratory analysis. According French soil classification of 1967, three main soil types are distinguished in the watershed: Lithosol (soil1), Ferruginous Tropical Soil (soil2) and Mineral Hydromorphic Soil (soil3). Sol1 is marginal for cropping and wood development and the two others soils are indicated for actual agricultural intensification. Concerning land use, there are mainly cropland and land under natural vegetation, subjected to vainly grazing. The general trend is the soil degradation whereas land use. Carbon stock is low (20.2 t.ha-1 in the first 30 cm of soil profile). Soil 1 and 2 are affected by erosion, respectively 2.7 and 5.7 t.ha- 1 .yr-1 or 0.4 and 0.2 cm.yr-1 ; Soil3, located in the depression along river system is a sedimentation site: 10.1t.ha-1 .yr-1 or 0.7 cm.yr-1 . Major process currently affecting Bélékoni watershed are land use change, soil degradation and sedimentation in the river. more...
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- 2013
38. Core-derived historical records of suspended sediment origin in a mesoscale mountainous catchment: the Bléone River French Alpas
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Navratil, O., Evrard, O., Esteves, Michel, Ayrault, Sophie, Lefevre, Irene, Legout, Cédric, Reyss, Jean-Louis, Gratiot, Nicolas, Nemery, Julien, Mathys, Nicolle, Poirel, Alain, Bonté, Philippe, Erosion torrentielle neige et avalanches (UR ETGR (ETNA)), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), 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), Laboratoire d'étude des transferts en hydrologie et environnement (LTHE), Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Océan et Interfaces (OCEANIS), 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), Electricité de France - Division Technique Générale (EDF DTG), ANR-06-BLAN-0379,STREAMS,Sediment Transport and Erosion Across Mountains(2006), 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), Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique de Grenoble (INPG)-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), Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique de Grenoble (INPG)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Laboratoire d'Etude des Transferts en Hydrologie et Environnement, and Université Joseph Fourier - Grenoble 1 (UJF) more...
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mesoscale mountainous catchment ,[SDU.STU.ME]Sciences of the Universe [physics]/Earth Sciences/Meteorology ,[SHS]Humanities and Social Sciences ,Sediment core ,Geochemistry ,Braided river ,Erosion ,Radionuclide ,Bléone River ,suspended sediment origin ,[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology ,historical records ,[SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology ,French Alps ,[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment ,Sediment fingerprinting ,ComputingMilieux_MISCELLANEOUS - Abstract
International audience
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- 2012
39. Evidence of the radioactive fallout due to the Fukushima nuclear accident in France
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O., Evrard, Van Beek, Pieter, Gateuille, D., Pont, V., Lefèvre, Irène, LANSARD, Bruno, Bonté, Philippe, Laboratoire d'aérologie (LA), Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, and Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) more...
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[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] - Abstract
International audience; Radioactive fallout due to the Fukushima reactor explosion in Japan was detected in environmental samples collected in France. The presence of 131I in aerosols (200 ± 6 μBq m−3) collected at the Pic du Midi observatory, located at 2877 m altitude in the French Pyrénées, indicated that the Japanese radioactive cloud reached France between 22 and 29 March, i.e. less than two weeks after the initial emissions, as suggested by a 137Cs/134Cs ratio of 1.4. Cesium radioisotopes (134Cs and 137Cs) were not detected in this sample but they were present in the aerosol sample collected the next week, i.e. between 29 March and 05 April (about 10 μBq m−3). We also report 131I activities measured in grass (1.1-11 Bq kg−1; fresh weight) and soil samples (0.4 Bq kg−1) collected in the Seine River basin between 30 March and 10 April. The 134Cs from the damaged Fukushima power plant was also detected in grass collected in the Seine River basin between 31 March and 10 April (0.2-1.6 Bq kg−1 fresh weight, with a 137Cs/134Cs ratio close to 1, which is consistent with Fukushima radioactive release). Despite the installation of a network of nested stations to collect suspended matter in the upstream part of the Seine River basin, 131I was only detected in suspended matter (4.5-60 Bq kg−1) collected at the most upstream stations between 30 March and 12 April. Neither 131I nor 134Cs has been detected in environmental samples since the end of April 2011, because of the rapid decay of 131I and the very low activities of 134Cs (about 400 times lower than after Chernobyl accident). more...
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- 2012
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40. Tracing sediment sources in a tropical highland catchment of central Mexico by using conventional and alternative fingerprinting methodsTracing sediment sources in a tropical
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Evrard, O., Poulenard, Jérôme, Nemery, Julien, Ayrault, Sophie, Gratiot, Nicolas, Duvert, Clément, Prat, Christian, Lefèvre, Irène, Bonté, Philippe, Esteves, Michel, Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS), Environnements, Dynamiques et Territoires de la Montagne (EDYTEM), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'étude des transferts en hydrologie et environnement (LTHE), Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique de Grenoble (INPG)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), 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), Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]), Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), ANR-06-BLAN-0379,STREAMS,Sediment Transport and Erosion Across Mountains(2006), 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, Dynamiques et Territoires de Montagne (EDYTEM), Observatoire des Sciences de l'Univers de Grenoble (OSUG), and Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS) more...
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fingerprinting ,sediment ,[SDE.MCG]Environmental Sciences/Global Changes ,[SDE]Environmental Sciences ,soil types ,[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology ,tropical catchment ,[SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology ,[SDV.SA.SDS]Life Sciences [q-bio]/Agricultural sciences/Soil study ,[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment ,Mexico ,Panoply - Abstract
International audience; Land degradation is intense in tropical regions where it causes for instance a decline in soil fertility and reservoir siltation. Two fingerprinting approaches (i.e. the conventional approach based on radionuclide and geochemical concentrations and the alternative diffuse reflectance infrared Fourier transform spectroscopy method) were conducted independently to outline the sources delivering sediment to the river network draining into the Cointzio reservoir, in Mexican tropical highlands. This study was conducted between May and October in 2009 in subcatchments representative of the different environments supplying sediment to the river network. Overall, Cointzio catchment is characterized by very altered soils and the dominance of Andisols and Acrisols. Both fingerprinting methods provided very similar results regarding the origin of sediment in Huertitas subcatchment (dominated by Acrisols) where the bulk of sediment was supplied by gullies. In contrast, in La Cortina subcatchment dominated by Andisols, the bulk of sediment was supplied by cropland. Sediment originating from Potrerillos subcatchment characterized by a mix of Acrisols and Andisols was supplied in variable proportions by both gullies and rangeland/cropland. In this latter subcatchment, results provided by both fingerprinting methods were very variable. Our results outline the need to take the organic carbon content of soils into account and the difficulty to use geochemical properties to fingerprint sediment in very altered volcanic catchments. However, combining our fingerprinting results with sediment export data provided a way of prioritizing the implementation of erosion control measures to mitigate sediment supply to the Cointzio reservoir supplying drinking water to Morelia city. Copyright © 2012 John Wiley & Sons, Ltd. more...
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- 2012
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- View/download PDF
41. Sediment dynamics in tropical highland catchments of central Mexico using fallout radionuclides
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Evrard, O., Némery, Julien, Gratiot, Nicolas, Duvert, Clément, Lefèvre, Irène, Ayrault, Sophie, Esteves, Michel, Bonté, Philippe, 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), Laboratoire d'étude des transferts en hydrologie et environnement (LTHE), Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), ANR-06-BLAN-0379,STREAMS,Sediment Transport and Erosion Across Mountains(2006), 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), Observatoire des Sciences de l'Univers de Grenoble (OSUG), and Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS) more...
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[SDE]Environmental Sciences ,[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology ,[SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology ,[SDV.SA.SDS]Life Sciences [q-bio]/Agricultural sciences/Soil study ,[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment - Abstract
International audience; Tropical regions are affected by intense soil erosion. This land degradation leads to important on-site (e.g. decrease in soil fertility) and off-site (e.g. reservoir siltation, water pollution) impacts. This study determined the mean soil particle and sediment residence times in soils and rivers of three catchments (3 – 12 km2) with contrasted land uses (i.e. cropland, forests, rangelands) located in highlands of the transvolcanic Mexican belt. Calculations were based on rainfall amount and river discharges as well as on fallout radionuclide measurements (Be-7, Cs-137, Pb-210) conducted on rainfall precipitated samples, soil sampled in the catchments and suspended sediment collected by automatic samplers in the river during most storms recorded all throughout the 2009 rainy season. Calculations using a radionuclide two-box balance model showed that the mean residence time of sediment in soils ranged between 5,000 (± 1,500) – 23,300 (± 7,000) years. In contrast, sediment residence time in rivers was much shorter, fluctuating between 50 (± 30) and 200 (± 70) days. The shortest mean residence times were measured in a hilly catchment dominated by cropland and rangelands, whereas they were the longest in an undulating catchment dominated by forests and cropland. Calculation of the Be-7/excess-Pb-210 in both rainfall and sediment allowed gaining insight on sediment dynamics throughout the rainy season. The first heavy storms of the year exported the bulk of the sediment stock accumulated in the river channel during the previous year. Our results show the priority of stabilising old gully systems and to concentrate the implementation of on-site erosion control measures in cropland and rangeland of the most reactive catchments. more...
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- 2010
42. Quantifying the resuspension of sediment and associated metallic contaminants with fallout radionuclide measurements in a channelized river draining an industrial catchment
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Zebracki, Mathilde, primary, Alary, Claire, additional, Lefèvre, Irène, additional, Nan-Hammade, Vasilica, additional, Evrard, Olivier, additional, and Bonté, Philippe, additional
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- 2015
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43. Estimation of sediment residence times in subtropical highland catchments of central Mexico combining river gauging and fallout radionuclides
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Evrard, Olivier, Némery, Julien, Gratiot, Nicolas, Duvert, Clément, Lefèvre, Irène, Ayrault, Sophie, Esteves, Michel, Bonté, Philippe, 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), Laboratoire d'étude des transferts en hydrologie et environnement (LTHE), Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-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)-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), Observatoire des Sciences de l'Univers de Grenoble (OSUG), and Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS) more...
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[SDE.MCG]Environmental Sciences/Global Changes ,[SDE]Environmental Sciences ,[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology ,[SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology ,[SDV.SA.SDS]Life Sciences [q-bio]/Agricultural sciences/Soil study ,[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment - Abstract
International audience; Subtropical regions of the world are affected by intense soil erosion associated with deforestation, overgrazing and cropping intensification. This land degradation leads to important on-site (e.g. decrease in soil fertility) and off-site impacts (e.g. reservoir sedimentation, water pollution). This study determined the mean sediment residence times in soils and rivers of three catchments (3-12 km$^2$) with contrasted land uses (i.e. cropland, forests, rangelands, extended gully networks) located in highlands of the transvolcanic belt of central Mexico. Calculations were based on rainfall and river gauging as well as on fallout radionuclide measurements (Be-7, Cs-137, Pb-210). Atmospheric deposition of Be-7 and Pb-210 was estimated based on the analysis of rainfall precipitated samples. Rainfall samples were collected all throughout the rainy season in order to take account of the temporal variations of the radionuclide fluxes. Furthermore, sampling of suspended sediment was conducted at the outlet of each catchment during most of the storms that occurred throughout the 2009 rainy season. Be-7, Cs-137 and Pb-210 concentrations of this sediment were determined by gamma-spectrometry. A two-box balance model was then used to estimate the sediment residence time and the inventory of radionuclides in the three selected catchments. This model subdivided each catchment into two boxes: (i) a "soil-box" characterised by low transport velocities and hence long radionuclide residence times and (ii) a "river-box" covering the river surface and its surroundings characterised by quicker exchanges and shorter radionuclide residence times. Input and output fluxes of sediment and radionuclides were taken into account in each box. Radioactive decay during the residence time of sediment was also considered. The mean residence time of sediment in soils ranged between 13,300-28,500 years. In contrast, sediment residence time in rivers was much shorter, fluctuating between 28 and 393 days. The shortest residence time (∼ 3 months) was measured in a catchment dominated by rangelands, whereas it was the longest (∼ 13 months) in a catchment dominated by cropland and extensive networks of 'historical' gullies. Our results support the hypothesis of a sediment transfer through a succession of deposition and resuspension steps. They also show the priority of stabilising old gully systems and to implement on-site erosion control measures in subtropical regions. more...
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- 2010
44. Estimation of erosion and sediment export from an agricultural catchment (1960 – 2000) confronting the outputs of an expert-based model and Cs-137 inventories
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Evrard, O., Nord, Guillaume, Cerdan, Olivier, Souchere, Veronique, Le Bissonnais, Yves, Bonté, Philippe, Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS), Institute of Environmental Assessment and Water Research (IDAEA), Consejo Superior de Investigaciones Científicas [Spain] (CSIC), Bureau de Recherches Géologiques et Minières (BRGM) (BRGM), Sciences pour l'Action et le Développement : Activités, Produits, Territoires (SADAPT), Institut National de la Recherche Agronomique (INRA)-AgroParisTech, Laboratoire d'étude des Interactions Sol - Agrosystème - Hydrosystème (UMR LISAH), Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut de Recherche pour le Développement (IRD [ Madagascar])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), 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), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Institut de Recherche pour le Développement (IRD)-Institut de Recherche pour le Développement (IRD [ Madagascar])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Institut national des sciences de l'Univers (INSU - CNRS)-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)-Université Paris-Saclay-Institut national des sciences de l'Univers (INSU - CNRS)-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)-Université Paris-Saclay-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), AgroParisTech-Université Paris-Saclay-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), and AgroParisTech-Institut National de la Recherche Agronomique (INRA) more...
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normandie ,sédiment ,remembrement ,Geography ,[SDE.MCG]Environmental Sciences/Global Changes ,utilisation du territoire ,HYDROLOGIE ,érosion ,[SHS.GEO]Humanities and Social Sciences/Geography ,[SDV.SA.SDS]Life Sciences [q-bio]/Agricultural sciences/Soil study ,modèle ,spatialisation ,bassin versant ,environnement ,[SDU]Sciences of the Universe [physics] ,[SDE]Environmental Sciences ,[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology ,[SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology ,[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment ,europe ,eau de ruissellement ,saison ,Géographie ,france - Abstract
International audience; Soil erosion leads to important environmental problems (e.g. muddy floods, reservoir sedimentation) in cultivated areas of the European loess belt. This study aimed to quantify erosion and to determine the impact of rainfall seasonality and land use change on soil erosion over the last 40 years in a 94-ha cultivated catchment of Nor-mandy (France). To this end, scenarios representative of the different land use conditions were simulated using the STREAM expert-based erosion model. A 13-yrs long sequence of rainfall events was run with this model. Results showed that erosion increased dramatically after land consolidation (+168% on average). Interannual variability of erosion is important. After land consolidation, 79% of erosion was observed in summer and autumn, even though these seasons only accounted for 58% of annual rainfall kinetic energy. The bulk of erosion was hence produced by a few intense thunderstorms during this period. Thunderstorms correspond to 5% of rainfall events, but they generate 51% of total annual erosion after land consolidation (and up to 57% of erosion before land consolidation). Confrontation of the model outputs with the erosion rates derived from Cs-137 measurements suggested that soil redistribution within the catchment was very high but that sediment exports from the catchment remained limited (sediment delivery ratio between 1-10%). Erosion rates derived from Cs-137 measurements showed an important and organised spatial variability, but erosion rates integrated over larger areas remained in the same order of magnitude than those simulated by the model or were slightly higher. Water erosion would hence not be the only process generating erosion within this catchment. In this context, tillage erosion cannot be neglected to calculate the sediment budget over several decades. These findings show the necessity to simulate sequences of rainfall events to obtain reliable erosion predictions. They also demonstrate the interest of developping expert-based models simulating both water and tillage erosion at the catchment scale to conduct erosion studies over several decades. more...
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- 2010
45. Caractérisation des phases porteuses : métaux particulaires en Seine
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Rianti, Cindy, Ayrault, Sophie, Morin, Guillaume, and Bonté, Philippe
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- 2010
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46. Archives sédimentaires, empreinte des micropolluants dans le bassin de la Seine sur 80 ans
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Ayrault, Sophie, Lorgeoux, Catherine, Moilleron, Régis, Lhe, Damien, Gasperi, Johnny, Tassin, Bruno, Bonté, Philippe, Roy-Barman, Matthieu, Le Cloarec, Marie-Françoise, Lefèvre, Irène, Priadi, Cindy, Evrard, Olivier, Bordier, Louise, Lestel, Laurence, Mouchel, Jean-Marie, Eurin, Joëlle, Tamtam, Fatima, Quoc Dinh, Tuc, Chevreuil, Marc, and Boust, Dominique more...
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- 2010
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47. Impact of land use on soils quality and erosion-sedimentation balance in the malian cotton zone (case of Bélékoni Watershed)
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Diallo, Drissa, Bengaly, Aboubacar, Diarra, Gaiba, Bonté, Philippe, Rapidel, Bruno, Mahé, Gil, Diallo, Drissa, Bengaly, Aboubacar, Diarra, Gaiba, Bonté, Philippe, Rapidel, Bruno, and Mahé, Gil
- Abstract
Bélékoni watershed (120km2 ) is located in the upper basin of Niger River in Mali. The climate context (Sudanian zone) justify cotton production program. Analysis of last decades agricultural evolution impacts is the objective of the present study. Research methods include in situ observations and measurements and laboratory analysis. According French soil classification of 1967, three main soil types are distinguished in the watershed: Lithosol (soil1), Ferruginous Tropical Soil (soil2) and Mineral Hydromorphic Soil (soil3). Sol1 is marginal for cropping and wood development and the two others soils are indicated for actual agricultural intensification. Concerning land use, there are mainly cropland and land under natural vegetation, subjected to vainly grazing. The general trend is the soil degradation whereas land use. Carbon stock is low (20.2 t.ha-1 in the first 30 cm of soil profile). Soil 1 and 2 are affected by erosion, respectively 2.7 and 5.7 t.ha- 1 .yr-1 or 0.4 and 0.2 cm.yr-1 ; Soil3, located in the depression along river system is a sedimentation site: 10.1t.ha-1 .yr-1 or 0.7 cm.yr-1 . Major process currently affecting Bélékoni watershed are land use change, soil degradation and sedimentation in the river. more...
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- 2014
48. Spatial and temporal dynamics of sediment in contrasted mountainous watersheds (Mexican transverse volcanic axis and French Southern Alps) combining river gauging, elemental geochemistry and fallout radionuclides
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Evrard, O., Navratil, O., Gratiot, Nicolas, Némery, Julien, Duvert, Clément, Ayrault, Sophie, Lefèvre, Irène, Esteves, Michel, Bonté, Philippe, Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), 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), Géochimie Des Impacts (GEDI), 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), Laboratoire d'étude des transferts en hydrologie et environnement (LTHE), Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS), ANR-06-BLAN-0379,STREAMS,Sediment Transport and Erosion Across Mountains(2006), 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)-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 Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG), and Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS) more...
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[SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry ,[SDE]Environmental Sciences ,[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology ,[SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology ,[SDV.SA.SDS]Life Sciences [q-bio]/Agricultural sciences/Soil study ,[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment - Abstract
International audience; In mountainous environments, an excessive sediment supply to the rivers typically leads to an increase in water turbidity, pollution and a rapid filling of reservoirs. This situation is particularly problematic in regions where reservoirs are used to provide drinking water to large cities (e.g. in central Mexico) or where stream water is used to run hydroelectric power plants (e.g. in the French Southern Alps). Sediment source areas need first to be delineated and sediment fluxes between hillslopes and the river system must be better understood to implement efficient erosion control measures. In this context, the STREAMS (« Sediment Transport and Erosion Across MountainS ») project funded by the French National Research Agency (ANR) aims at understanding the spatial and temporal dynamics of sediment at the scale of mountainous watersheds (between 500 – 1000 km2) located in contrasted environments. This 4-years study is carried out simultaneously in a volcanic watershed located in the Mexican transverse volcanic axis undergoing a sub-humid tropical climate, as well as in a sedimentary watershed of the French Southern Alps undergoing a transitional climate with Mediterranean and continental influences. One of the main specificities of this project consists in combining traditional monitoring techniques (i.e. installation of river gauges and sediment samplers in several sub-catchments) and sediment fingerprinting using elemental geochemistry (measured by Instrumental Neutron Activation Analysis – INAA – and Inductively Coupled Plasma - Mass Spectrometry – ICP-MS) and fallout radionuclides (measured by gamma spectrometry). In the French watershed, geochemical analysis allows outlining different sediment sources (e.g. the contribution of calcareous vs. marl-covered sub-catchments). Radionuclide ratios (e.g. Cs-137/Be-7) allow identifying the dominant erosion processes occurring within the watershed. Areas mostly affected by gully erosion, rill or sheet erosion have been delineated. Furthermore, the measurement of radionuclide content in suspended sediment after the snowmelt suggests that most of this sediment consists in resuspended material rather than on newly eroded soil. In the Mexican watershed, a different contribution of andosols and acrisols to erosion is suspected. Overall, the bulk of erosion is generated by rather small areas of the watershed. In this region characterised by a succession of wet and dry seasons, the Be-7 content in rainfall and sediment has been measured at the scale of a 2.5-km2 sub-watershed in order to better understand the erosion transfer between hillslopes and rivers during the wet season. This outlines the contribution of individual storms to seasonal erosion. Overall, this study brings important insights about sediment sources and fluxes within these watersheds located in contrasted environments. A further step consists in comparing experimental results with model outputs, and to evaluate the impact of on-going erosion mitigation measures. more...
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- 2009
49. Magnetic particle characterization in the Seine river system: Implications for the determination of natural versus anthropogenic input
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Franke, Christine, Kissel, Catherine, Robin, Eric, Bonté, Philippe, Lagroix, France, Centre de Géosciences (GEOSCIENCES), MINES ParisTech - École nationale supérieure des mines de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), 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), Climat et Magnétisme (CLIMAG), 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), Géochimie Des Impacts (GEDI), Institut de Physique du Globe de Paris (IPGP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-IPG PARIS-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS), MINES ParisTech - École nationale supérieure des mines de Paris-PSL Research University (PSL), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Mines Paris - PSL (École nationale supérieure des mines de Paris), 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), and Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS) more...
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environmental magnetism ,[SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] ,natural sources ,[SDU.STU]Sciences of the Universe [physics]/Earth Sciences ,Seine river system ,anthropogenic input ,[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment ,human activities ,suspended particulate matter ,ComputingMilieux_MISCELLANEOUS ,scanning electron microscopy - Abstract
International audience; This study presents an innovative application of well-established environmental magnetic proxy parameters on fluvial sediments, with the aim to trace geological and human-induced processes in the complex Seine river drainage system in northern France. We seek to identify environmental fingerprints of mechanical and chemical weathering processes, the regional distribution of the suspended material, and changes in the balance of natural input versus anthropogenic pollution. In order to reach these goals, we applied a combination of rock magnetic and advanced scanning electron microscopic techniques on a large number of sediment trap samples. Generally, we observe an increase in magnetic concentration coupled with a coarsening in magnetic grain size downstream of the Seine river system. Furthermore, the dominant magnetomineralogy changes from high-coercivity minerals upstream in more rural areas to magnetite-dominated assemblages downstream. Each river (segment) shows its specific trend line depending on regional initial input, weathering conditions, drainage area, and potential pollution sources. One major outcome of this study is the observed significant correlation between anthropogenic antimony-rich iron oxide particles and the magnetic concentration. This shows the potential of magnetic remanence measurements as proxy parameters for specific heavy metal pollution concentrations. Hence, the environmental magnetic study presented herein serves to identify major trends as well as local particularities and leads to quantitative analyses of the contributions of individual tributaries in the Seine river system. more...
- Published
- 2009
- Full Text
- View/download PDF
50. Variabilité spatiale et temporelle de la spéciation des métaux particulaires en Seine : approche par l'extraction séquentielle
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Rianti, Cindy, Ayrault, Sophie, Pacini, Stéphanie, and Bonté, Philippe
- Published
- 2009
- Full Text
- View/download PDF
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