{"id":70573,"date":"2025-08-13T12:00:00","date_gmt":"2025-08-13T12:00:00","guid":{"rendered":"https:\/\/www.africa-press.net\/senegal\/politique\/sous-la-mer-leau-douce"},"modified":"2025-08-13T23:18:05","modified_gmt":"2025-08-13T23:18:05","slug":"sous-la-mer-leau-douce","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/sous-la-mer-leau-douce","title":{"rendered":"Sous la Mer, L\u2019Eau Douce"},"content":{"rendered":"<p><span style=\"color: #ff6600\"><strong>Africa-Press &#8211; Senegal. <\/strong><\/span>Alimentera-t-on un jour les re\u0301gions littorales menace\u0301es par la se\u0301cheresse par de l\u2019eau douce puise\u0301e en mer? En plusieurs endroits du monde, en effet, sous le plancher oce\u0301anique du plateau continental, des forages et des releve\u0301s e\u0301lectromagne\u0301tiques ont mis au jour d\u2019importantes nappes de fluides faiblement sale\u0301s dans des zones e\u0301loigne\u0301es des co\u0302tes de plus de 50 kilome\u0300tres. A\u0300 l\u2019e\u0301chelle du globe, ces aquife\u0300res marins contiendraient 1 million de kilome\u0300tres cubes d\u2019eau \u2013 la consommation de la France sur 244.000 ans !<\/p>\n<p>Depuis le 1er mai, une campagne d\u2019exploration mobilise une quarantaine de scientifiques \u2013 dont des Franc\u0327ais \u2013 en face de la Nouvelle-Angleterre (E\u0301tats-Unis). L\u2019expe\u0301dition 501 du programme international IODP3 consiste a\u0300 forer les fonds sous-marins sur 550 me\u0300tres dans trois zones, en vue de re\u0301cupe\u0301rer des e\u0301chantillons d\u2019eau et de se\u0301diments, de re\u0301aliser des mesures et de de\u0301poser des instruments dans des puits.<\/p>\n<p><b>Des ressources renouvelables?<\/b><\/p>\n<p>\u00ab Nous voulons re\u0301aliser la premie\u0300re e\u0301tude de\u0301taille\u0301e d\u2019un de ces re\u0301seaux hydroge\u0301ologiques et comprendre comment, et a\u0300 quelle e\u0301poque, il a e\u0301te\u0301 alimente\u0301 en eau douce \u00bb, explique Brandon Dugan, professeur a\u0300 l\u2019E\u0301cole des mines du Colorado.<\/p>\n<p>Les ge\u0301ophysiciens ignorent encore si ces gisements offshore communiquent avec des aquife\u0300res terrestres. Et donc s\u2019ils sont susceptibles d\u2019e\u0302tre recharge\u0301s par les pre\u0301cipitations tombant sur le continent, ce qui en ferait des ressources renouvelables. Une condition sine qua non a\u0300 leur e\u0301ventuelle exploitation.<\/p>\n<p><strong>Pour plus d&rsquo;informations et d&rsquo;analyses sur la <span style=\"color: #ff6600\">Senegal<\/span>, suivez <span style=\"color: #ff6600\">Africa-Press<\/span><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Africa-Press &#8211; Senegal. Alimentera-t-on un jour les re\u0301gions littorales menace\u0301es par la se\u0301cheresse par de l\u2019eau douce puise\u0301e en mer? En plusieurs endroits du monde, en effet, sous le plancher oce\u0301anique du plateau continental, des forages et des releve\u0301s e\u0301lectromagne\u0301tiques ont mis au jour d\u2019importantes nappes de fluides faiblement sale\u0301s dans des zones e\u0301loigne\u0301es des [&hellip;]<\/p>\n","protected":false},"author":82,"featured_media":70572,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,10],"tags":[44],"class_list":["post-70573","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-toutes-les-actualites","tag-senegal-2"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.1 (Yoast SEO v27.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Sous la Mer, L\u2019Eau Douce - Senegal<\/title>\n<meta name=\"description\" content=\"Alimentera-t-on un jour les re\u0301gions littorales menace\u0301es par la se\u0301cheresse par de l\u2019eau douce puise\u0301e en mer? 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