{"id":2440,"date":"2024-10-03T21:59:00","date_gmt":"2024-10-03T19:59:00","guid":{"rendered":"https:\/\/www.guineeline.net\/?p=2440"},"modified":"2024-10-03T21:59:00","modified_gmt":"2024-10-03T19:59:00","slug":"la-centrale-hydroelectrique-qui-a-change-la-terre-comment-cette-centrale-peut-elle-affecter-la-rotation-planetaire","status":"publish","type":"post","link":"https:\/\/www.guineeline.net\/index.php\/2024\/10\/03\/la-centrale-hydroelectrique-qui-a-change-la-terre-comment-cette-centrale-peut-elle-affecter-la-rotation-planetaire\/","title":{"rendered":"La centrale hydro\u00e9lectrique qui a chang\u00e9 la Terre : comment cette centrale peut-elle affecter la rotation plan\u00e9taire ?"},"content":{"rendered":"<p>La centrale hydro\u00e9lectrique des Trois Gorges, en Chine, est la plus grande au monde. Elle surprend non seulement par sa production d&rsquo;\u00e9lectricit\u00e9, mais aussi par son impact sur la rotation de la Terre, qui modifie l\u00e9g\u00e8rement l&rsquo;heure de la journ\u00e9e.<\/p>\n<p>La Chine est connue dans le monde entier pour ses gigantesques projets d&rsquo;infrastructure, et l&rsquo;un des plus impressionnants est la centrale hydro\u00e9lectrique des Trois Gorges, situ\u00e9e sur le fleuve Yangtze dans la province de Hubei.<\/p>\n<p>Inaugur\u00e9e en 2012 apr\u00e8s 18 ans de construction, cette centrale est la plus grande au monde en termes de capacit\u00e9 install\u00e9e et peut produire jusqu&rsquo;\u00e0 22 500 m\u00e9gawatts (MW) d&rsquo;\u00e9nergie.<\/p>\n<p>De plus, sa capacit\u00e9 de stockage d&rsquo;eau d\u00e9passe les 39 milliards de m\u00e8tres cubes. Mais outre ses dimensions colossales, cette prouesse technique a une curieuse cons\u00e9quence : elle affecte la rotation de la Terre.<\/p>\n<p>Comment les centrales hydro\u00e9lectriques affectent-elles la rotation de la terre ?<br \/>\nL&rsquo;id\u00e9e qu&rsquo;un barrage hydro\u00e9lectrique puisse influencer le mouvement de rotation de notre plan\u00e8te peut sembler exag\u00e9r\u00e9e, mais c&rsquo;est une r\u00e9alit\u00e9. Des \u00e9tudes scientifiques montrent que le volume d&rsquo;eau d\u00e9plac\u00e9 par le barrage des Trois Gorges affecte l\u00e9g\u00e8rement l&rsquo;inertie de la Terre. Pour comprendre ce ph\u00e9nom\u00e8ne, il faut rappeler que l&rsquo;inertie d\u00e9signe la difficult\u00e9 qu&rsquo;a un corps \u00e0 modifier son mouvement, et dans le cas de la Terre, il s&rsquo;agit de la rotation autour de son axe.<\/p>\n<p>En retenant une quantit\u00e9 massive d&rsquo;eau \u00e0 175 m\u00e8tres de hauteur, la centrale provoque une redistribution de masse sur la plan\u00e8te. Ce ph\u00e9nom\u00e8ne, semblable \u00e0 l&rsquo;effet qui se produit lorsqu&rsquo;une patineuse tourne plus rapidement en rapprochant ses bras du corps, ralentit tr\u00e8s l\u00e9g\u00e8rement la rotation terrestre. Les calculs indiquent que ce changement est de seulement 0,06 microsecondes dans le temps de rotation quotidien de la Terre, une valeur extr\u00eamement petite mais n\u00e9anmoins mesurable.<\/p>\n<p>Autres cons\u00e9quences de la redistribution de masse<br \/>\nOutre la modification de la rotation, la redistribution des masses a \u00e9galement entra\u00een\u00e9 un d\u00e9placement de l&rsquo;axe de la Terre. On estime que la position du p\u00f4le terrestre s&rsquo;est d\u00e9plac\u00e9e d&rsquo;environ deux centim\u00e8tres en raison de la construction du barrage. Bien que ces chiffres puissent para\u00eetre insignifiants dans la vie quotidienne de la plupart des gens, ils sont pertinents dans certains contextes scientifiques.<br \/>\nLes dispositifs de haute pr\u00e9cision tels que les horloges atomiques, qui mesurent le temps avec une extr\u00eame exactitude, peuvent \u00eatre affect\u00e9s par ces variations. Certains scientifiques pensent qu&rsquo;il sera n\u00e9cessaire d&rsquo;ajuster les normes temporelles mondiales, peut-\u00eatre en introduisant une \u00ab seconde intercalaire n\u00e9gative \u00bb dans les d\u00e9cennies \u00e0 venir.<\/p>\n<p>L&rsquo;influence de l&rsquo;homme sur la plan\u00e8te<br \/>\nL&rsquo;impact des actions humaines sur la Terre ne se limite pas \u00e0 la construction de grands ouvrages. La fonte des calottes polaires, caus\u00e9e par le changement climatique, redistribue \u00e9galement la masse de la plan\u00e8te. La fonte des glaciers et l&rsquo;\u00e9l\u00e9vation du niveau des oc\u00e9ans tropicaux entra\u00eenent un l\u00e9ger ralentissement de la rotation de la Terre. En effet, la masse qui \u00e9tait auparavant concentr\u00e9e dans les r\u00e9gions polaires se d\u00e9place vers l&rsquo;\u00e9quateur, ce qui modifie la rotation de la plan\u00e8te.<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-medium wp-image-2442\" src=\"https:\/\/www.guineeline.net\/wp-content\/uploads\/2024\/10\/a-hidreletrica-que-mudou-a-terra-como-a-maior-usina-do-mundo-afeta-a-rotacao-do-planeta-1727723809450_512-300x200.jpg\" alt=\"\" width=\"300\" height=\"200\" srcset=\"https:\/\/www.guineeline.net\/wp-content\/uploads\/2024\/10\/a-hidreletrica-que-mudou-a-terra-como-a-maior-usina-do-mundo-afeta-a-rotacao-do-planeta-1727723809450_512-300x200.jpg 300w, https:\/\/www.guineeline.net\/wp-content\/uploads\/2024\/10\/a-hidreletrica-que-mudou-a-terra-como-a-maior-usina-do-mundo-afeta-a-rotacao-do-planeta-1727723809450_512.jpg 512w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><br \/>\nBien que ces changements soient minimes et n&rsquo;affectent pas directement la vie quotidienne des gens, ils soul\u00e8vent des questions importantes sur l&rsquo;impact des activit\u00e9s humaines sur la plan\u00e8te.<br \/>\nLe cas du barrage des Trois Gorges, en particulier, montre comment l&rsquo;architecture et l&rsquo;ing\u00e9nierie modernes peuvent influencer les ph\u00e9nom\u00e8nes naturels de mani\u00e8re inattendue.<br \/>\nLa centrale hydro\u00e9lectrique des Trois Gorges est un exemple impressionnant de la capacit\u00e9 de l&rsquo;homme \u00e0 fa\u00e7onner le monde qui l&rsquo;entoure. Toutefois, ce pouvoir s&rsquo;accompagne \u00e9galement de responsabilit\u00e9s.<br \/>\nLe fait que les constructions humaines puissent modifier la rotation de la Terre, m\u00eame de fa\u00e7on infime, nous rappelle qu&rsquo;il faut \u00eatre conscient des impacts des grandes infrastructures sur l&rsquo;environnement et l&rsquo;\u00e9quilibre naturel de la plan\u00e8te. M\u00eame si ces changements sont imperceptibles pour le citoyen moyen, ils nous montrent l&rsquo;importance de bien r\u00e9fl\u00e9chir aux cons\u00e9quences globales de nos projets.<\/p>\n<p>Un article du site www.tameteo.com<\/p>\n","protected":false},"excerpt":{"rendered":"<p>La centrale hydro\u00e9lectrique des Trois Gorges, en Chine, est la plus grande au monde. Elle surprend non seulement par sa production d&rsquo;\u00e9lectricit\u00e9, mais aussi par son impact sur la rotation de la Terre, qui modifie l\u00e9g\u00e8rement l&rsquo;heure de la journ\u00e9e. La Chine est connue dans le monde entier pour ses gigantesques projets d&rsquo;infrastructure, et l&rsquo;un [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":2441,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jnews-multi-image_gallery":[],"jnews_single_post":{"subtitle":"","format":"standard","video":"","gallery":"","source_name":"","source_url":"","via_name":"","via_url":"","override_template":"0","override":[{"template":"1","single_blog_custom":"","parallax":"1","fullscreen":"1","layout":"right-sidebar","sidebar":"default-sidebar","second_sidebar":"default-sidebar","sticky_sidebar":"1","share_position":"top","share_float_style":"share-monocrhome","show_share_counter":"0","show_view_counter":"0","show_featured":"1","show_post_meta":"1","show_post_author":"1","show_post_author_image":"1","show_post_date":"1","post_date_format":"default","post_date_format_custom":"Y\/m\/d","show_post_category":"1","show_post_reading_time":"0","post_reading_time_wpm":"300","show_zoom_button":"0","zoom_button_out_step":"2","zoom_button_in_step":"3","show_post_tag":"1","show_prev_next_post":"1","show_popup_post":"1","number_popup_post":"1","show_author_box":"0","show_post_related":"0","show_inline_post_related":"0"}],"override_image_size":"0","image_override":[{"single_post_thumbnail_size":"crop-500","single_post_gallery_size":"crop-500"}],"trending_post":"0","trending_post_position":"meta","trending_post_label":"Trending","sponsored_post":"0","sponsored_post_label":"Sponsored by","sponsored_post_name":"","sponsored_post_url":"","sponsored_post_logo_enable":"0","sponsored_post_logo":"","sponsored_post_desc":"","disable_ad":"0"},"jnews_primary_category":{"id":"","hide":""},"jnews_override_counter":[],"footnotes":""},"categories":[2,22],"tags":[],"class_list":["post-2440","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","category-energie"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>La centrale hydro\u00e9lectrique qui a chang\u00e9 la Terre : comment cette centrale peut-elle affecter la rotation plan\u00e9taire ? - Guineeline<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.guineeline.net\/index.php\/2024\/10\/03\/la-centrale-hydroelectrique-qui-a-change-la-terre-comment-cette-centrale-peut-elle-affecter-la-rotation-planetaire\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"La centrale hydro\u00e9lectrique qui a chang\u00e9 la Terre : comment cette centrale peut-elle affecter la rotation plan\u00e9taire ? - Guineeline\" \/>\n<meta property=\"og:description\" content=\"La centrale hydro\u00e9lectrique des Trois Gorges, en Chine, est la plus grande au monde. Elle surprend non seulement par sa production d&rsquo;\u00e9lectricit\u00e9, mais aussi par son impact sur la rotation de la Terre, qui modifie l\u00e9g\u00e8rement l&rsquo;heure de la journ\u00e9e. 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Elle surprend non seulement par sa production d&rsquo;\u00e9lectricit\u00e9, mais aussi par son impact sur la rotation de la Terre, qui modifie l\u00e9g\u00e8rement l&rsquo;heure de la journ\u00e9e. 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