{"id":29546,"date":"2026-08-04T14:31:00","date_gmt":"2026-08-04T14:31:00","guid":{"rendered":"https:\/\/infos-media-nantes.fr\/?p=29546"},"modified":"2026-08-04T14:31:01","modified_gmt":"2026-08-04T14:31:01","slug":"secheresse-loire-atlantique-cours-eau-ofb","status":"publish","type":"post","link":"https:\/\/infos-media-nantes.fr\/secheresse-loire-atlantique-cours-eau-ofb\/","title":{"rendered":"S\u00e9cheresse : la Loire-Atlantique parmi les d\u00e9partements les plus touch\u00e9s, alerte l\u2019Office fran\u00e7ais de la biodiversit\u00e9"},"content":{"rendered":"\n<article>\n\n  <header>\n       <p>La situation continue de se d\u00e9grader en Loire-Atlantique. Dans son dernier bilan, publi\u00e9 le 3 ao\u00fbt 2026, l\u2019Office fran\u00e7ais de la biodiversit\u00e9 (OFB) classe le d\u00e9partement parmi les secteurs les plus fragilis\u00e9s de France. Les petits cours d\u2019eau s\u2019ass\u00e8chent \u00e0 un niveau jug\u00e9 historique, malgr\u00e9 les restrictions d\u2019eau d\u00e9j\u00e0 mises en place.<\/p>\n  <\/header>\n\n  <section>\n    <h2>Une situation \u00ab historique \u00bb pour les cours d\u2019eau<\/h2>\n\n    <p>L\u2019OFB dresse un constat pr\u00e9occupant. Les ruptures d\u2019\u00e9coulement et les assecs touchent d\u00e9sormais l\u2019ensemble du territoire, mais certaines zones connaissent une d\u00e9gradation particuli\u00e8rement marqu\u00e9e.<\/p>\n\n    <p>La Loire-Atlantique figure d\u00e9sormais parmi les d\u00e9partements les plus fragiles, aux c\u00f4t\u00e9s de la Vend\u00e9e, des Deux-S\u00e8vres ou encore de la Charente-Maritime.<\/p>\n\n    <p>Selon l\u2019\u00e9tablissement public, la situation observ\u00e9e fin juin 2026 est la plus critique jamais enregistr\u00e9e \u00e0 cette p\u00e9riode depuis la cr\u00e9ation du r\u00e9seau national ONDE en 2012. Un quart des points de suivi pr\u00e9sentent d\u00e9j\u00e0 une rupture d\u2019\u00e9coulement ou un ass\u00e8chement. \ue200cite\ue202turn0search0\ue201<\/p>\n  <\/section>\n\n  <section>\n    <h2>Des cons\u00e9quences pour l\u2019eau et la biodiversit\u00e9<\/h2>\n\n    <p>La baisse du niveau des cours d\u2019eau menace directement les milieux aquatiques. Les poissons, les amphibiens et de nombreuses esp\u00e8ces d\u00e9pendantes de ces habitats voient leurs conditions de vie se d\u00e9grader.<\/p>\n\n    <p>L\u2019OFB rappelle \u00e9galement que cette s\u00e9cheresse compromet les diff\u00e9rents usages de l\u2019eau. Agriculture, irrigation, activit\u00e9s \u00e9conomiques et alimentation en eau potable sont concern\u00e9s lorsque les ressources diminuent durablement. \ue200cite\ue202turn0search0\ue201<\/p>\n  <\/section>\n\n  <section>\n    <h2>Des restrictions d\u00e9j\u00e0 renforc\u00e9es en Loire-Atlantique<\/h2>\n\n    <p>Face \u00e0 cette d\u00e9gradation, la pr\u00e9fecture de Loire-Atlantique a progressivement renforc\u00e9 les restrictions d\u2019usage de l\u2019eau au cours des derni\u00e8res semaines.<\/p>\n\n    <p>Plusieurs bassins versants ont \u00e9t\u00e9 plac\u00e9s en alerte renforc\u00e9e ou en crise. Ces mesures limitent notamment l\u2019arrosage, le remplissage des piscines, certains pr\u00e9l\u00e8vements et diff\u00e9rents usages non prioritaires afin de pr\u00e9server la ressource. \ue200cite\ue202turn0search1\ue202turn0search2\ue201<\/p>\n\n    <p>Malgr\u00e9 ces d\u00e9cisions, les fortes chaleurs et l\u2019absence de pluies significatives continuent d\u2019aggraver la situation.<\/p>\n  <\/section>\n\n  <section>\n    <h2>Des pluies durables attendues pour inverser la tendance<\/h2>\n\n    <p>Selon l\u2019OFB, seules des pr\u00e9cipitations abondantes et durables permettront de recharger les cours d\u2019eau. De simples averses ne suffisent plus \u00e0 restaurer les \u00e9coulements.<\/p>\n\n    <p>En attendant, les autorit\u00e9s appellent les particuliers, les collectivit\u00e9s, les entreprises et les agriculteurs \u00e0 poursuivre leurs efforts pour \u00e9conomiser l\u2019eau. \ue200cite\ue202turn0search0\ue202turn0search8\ue201<\/p>\n\n    <p>Les habitants peuvent consulter les restrictions en vigueur sur leur commune gr\u00e2ce au service national <a href=\"https:\/\/vigieau.gouv.fr\" style=\"color:#5532F0;\"><strong><u>VigiEau<\/u><\/strong><\/a>.<\/p>\n  <\/section>\n<\/article>\n","protected":false},"excerpt":{"rendered":"<p>La situation continue de se d\u00e9grader en Loire-Atlantique. Dans son dernier bilan, publi\u00e9 le 3 ao\u00fbt 2026, l\u2019Office fran\u00e7ais de la biodiversit\u00e9 (OFB) classe le d\u00e9partement parmi les secteurs les plus fragilis\u00e9s de France. Les petits cours d\u2019eau s\u2019ass\u00e8chent \u00e0 un niveau jug\u00e9 historique, malgr\u00e9 les restrictions d\u2019eau d\u00e9j\u00e0 mises en place. Une situation \u00ab [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":29547,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","footnotes":"","event_start_date":"","event_end_date":"","event_location":"","imn_event_city":"","imn_event_start_time":"","imn_event_end_time":"","imn_event_all_day":"","imn_event_address":"","imn_event_ticket_url":"","imn_event_price":"","imn_event_status":"","imn_event_organizer":"","imn_event_accessibility":""},"categories":[22],"tags":[78,7701,1776,162,7,3527,6455,230],"class_list":["post-29546","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites-nantes","tag-biodiversite","tag-cours-deau","tag-eau","tag-environnement","tag-loire-atlantique","tag-ofb","tag-restrictions-deau","tag-secheresse"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>S\u00e9cheresse : la Loire-Atlantique parmi les d\u00e9partements les plus touch\u00e9s, alerte l\u2019Office fran\u00e7ais de la biodiversit\u00e9 - Infos M\u00e9dia Nantes, infos locales, \u00e9v\u00e9nements et actualit\u00e9 utiles \u00e0 Nantes et ses alentours<\/title>\n<meta name=\"description\" content=\"La Loire-Atlantique figure parmi les d\u00e9partements les plus touch\u00e9s par la s\u00e9cheresse. 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