{"id":1744,"date":"2024-09-26T16:25:17","date_gmt":"2024-09-26T14:25:17","guid":{"rendered":"https:\/\/observatoire-sediments-rhone.fr\/?p=1744"},"modified":"2024-09-27T10:40:04","modified_gmt":"2024-09-27T08:40:04","slug":"caracteriser-la-contamination-des-sediments-sur-lensemble-du-lineaire-du-rhone","status":"publish","type":"post","link":"https:\/\/observatoire-sediments-rhone.fr\/infos\/caracteriser-la-contamination-des-sediments-sur-lensemble-du-lineaire-du-rhone\/","title":{"rendered":"Caract\u00e9riser la contamination des s\u00e9diments sur l’ensemble du lin\u00e9aire du Rh\u00f4ne"},"content":{"rendered":"\n
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Dans le cadre de l’action B4 de l’OSR7, les scientifiques de l’Observatoire des S\u00e9diments du Rh\u00f4ne ont coordonn\u00e9 une grande campagne de terrain pour caract\u00e9riser la distribution spatiale de la contamination des s\u00e9diments de surface du Rh\u00f4ne afin de constituer une image quasi-instantan\u00e9e de la qualit\u00e9 de ces s\u00e9diments sur l’ensemble du lin\u00e9aire.<\/mark><\/strong> <\/p>\n\n\n\n

Cette campagne a eu lieu la premi\u00e8re semaine de septembre. Tous les 20 kilom\u00e8tres, depuis le lac L\u00e9man jusqu’\u00e0 la M\u00e9diterran\u00e9e, les \u00e9quipes de l’IRSN, du CNRS, de l’INRAE et de l’ENTPE ont fait des pr\u00e9l\u00e8vements de s\u00e9diments dans le fleuve et ses principaux affluents.<\/p>\n\n\n\n

Au total, 250 \u00e9chantillons ont \u00e9t\u00e9 pr\u00e9lev\u00e9s sur 28 stations le long du Rh\u00f4ne, ainsi que sur 14 stations sur ses affluents<\/strong> <\/mark>(Arve, Valserine, Fier, Guiers, Ain, Sa\u00f4ne, Gier, Cance, Is\u00e8re, Eyrieux, Dr\u00f4me, Ard\u00e8che, Durance, Gard).<\/p>\n\n\n\n

Sur chaque station, les scientifiques ont effectu\u00e9 des pr\u00e9l\u00e8vements calibr\u00e9s de s\u00e9diments superficiels immerg\u00e9s <\/mark><\/strong>et mesur\u00e9 les param\u00e8tres de l’eau dans la zone de pr\u00e9l\u00e8vement (hauteur, temp\u00e9rature, conductivit\u00e9, pH, O2 dissous, turbidit\u00e9).<\/p>\n<\/div>\n\n\n\n

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\"\"<\/figure>\n<\/div>\n<\/div>\n\n\n\n

Les \u00e9chantillons de s\u00e9diments vont faire l’objet d’analyses de la granulom\u00e9trie, de la teneur en eau, de la porosit\u00e9, de la min\u00e9ralogie et de concentrations en radionucl\u00e9ides, m\u00e9taux traces, mercure et PFAS.<\/strong><\/mark><\/p>\n\n\n\n

Ces donn\u00e9es d’analyse seront spatialis\u00e9es pour donner une cartographie de la contamination des s\u00e9diments surfaciques tout le long du continuum du Rh\u00f4ne et elles vont contribuer \u00e0 la calibration des mod\u00e8les de transferts des contaminants et \u00e0 la compr\u00e9hension de la dynamique de la contamination \u00e0 l\u2019\u00e9chelle du bassin-versant.<\/p>\n\n\n\n

Pour en savoir plus<\/mark><\/strong><\/p>\n\n\n\n

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Programme OSR 7 <\/strong><\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

Dans le cadre de l’action B4 de l’OSR7, les scientifiques de l’Observatoire des S\u00e9diments du Rh\u00f4ne ont coordonn\u00e9 une grande campagne de terrain pour caract\u00e9riser la distribution spatiale de la contamination des s\u00e9diments de surface du Rh\u00f4ne afin de constituer une image quasi-instantan\u00e9e de la qualit\u00e9 de ces s\u00e9diments sur l’ensemble du lin\u00e9aire.  Cette campagne […]<\/p>\n","protected":false},"author":2,"featured_media":1747,"comment_status":"open","ping_status":"open","sticky":true,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[87],"tags":[24,99,101],"class_list":["post-1744","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-infos","tag-osr","tag-osr7","tag-sediments"],"acf":[],"yoast_head":"\nCaract\u00e9riser la contamination des s\u00e9diments sur l'ensemble du 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