{"id":47174,"date":"2025-05-14T10:47:24","date_gmt":"2025-05-14T05:17:24","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=47174"},"modified":"2025-05-29T12:55:00","modified_gmt":"2025-05-29T07:25:00","slug":"mearim-river-tidal-bore","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/mearim-river-tidal-bore\/","title":{"rendered":"Mearim River &#8211; Tidal Bore"},"content":{"rendered":"<h2>Mearim River &#8211; Tidal Bore Latest News<\/h2>\n<p>Recently, a Brazilian surfer, known for surfing the world\u2019s longest tidal waves, uses the Mearim\u2019s pororoca to raise awareness about climate change and ecological degradation.<\/p>\n<h2>Mearim River<\/h2>\n<ul>\n<li>The\u00a0<strong>Mearim River<\/strong>\u00a0is a major river located in\u00a0<strong>Maranh\u00e3o state<\/strong>, in\u00a0<strong>northern Brazil<\/strong>.<\/li>\n<li>It\u00a0<strong>originates in southern Maranh\u00e3o<\/strong>\u00a0and\u00a0<strong>drains northward<\/strong>\u00a0into the\u00a0<strong>Ba\u00eda de S\u00e3o Marcos<\/strong>\u00a0(S\u00e3o Marcos Bay), where it forms a\u00a0<strong>common estuary<\/strong>\u00a0with the\u00a0<strong>Pindar\u00e9<\/strong>\u00a0and\u00a0<strong>Graja\u00fa rivers<\/strong>.<\/li>\n<li>The\u00a0<strong>river is ~800 km long<\/strong>, flowing through\u00a0<strong>the Atlantic Coastal Plain marshlands\u00a0<\/strong>and passing through\u00a0<strong>dense tropical rainforests<\/strong>\u00a0and\u00a0<strong>mangrove ecosystems<\/strong>.<\/li>\n<li>The river&#8217;s\u00a0<strong>upper and middle courses<\/strong>\u00a0are marked by\u00a0<strong>rapids<\/strong>, making them\u00a0<strong>non-navigable<\/strong>, while\u00a0<strong>only the lower course<\/strong>\u00a0is\u00a0<strong>suitable for navigation<\/strong>.<\/li>\n<li>The Mearim River forms the\u00a0<strong>southern boundary<\/strong>\u00a0of the\u00a0<strong>Tocantins\u2013Araguaia\u2013Maranh\u00e3o moist forests ecoregion<\/strong>, an important\u00a0<strong>biodiversity hotspot<\/strong>.<\/li>\n<\/ul>\n<h2>Tidal Bore (Pororoca) Phenomenon<\/h2>\n<ul>\n<li>The\u00a0<strong>Mearim River<\/strong>\u00a0is famous for its\u00a0<strong>pororoca<\/strong>, a\u00a0<strong>tidal bore<\/strong>\u00a0that occurs when\u00a0<strong>high tides from the ocean<\/strong>\u00a0travel\u00a0<strong>upstream into the river<\/strong>.<\/li>\n<li>The term\u00a0<strong>&#8220;pororoca&#8221;<\/strong>\u00a0is derived from the\u00a0<strong>Tupi Indigenous language<\/strong>, meaning\u00a0<strong>&#8220;great roar&#8221;<\/strong>, referring to the\u00a0<strong>thunderous sound<\/strong>\u00a0generated by the collision of\u00a0<strong>river and ocean waters<\/strong>.<\/li>\n<li>A\u00a0<strong>tidal bore<\/strong>\u00a0is a\u00a0<strong>positive surge<\/strong>\u00a0of water created when\u00a0<strong>rising ocean tides<\/strong>\u00a0push\u00a0<strong>against river currents<\/strong>, typically occurring during\u00a0<strong>spring tides<\/strong>\u00a0and\u00a0<strong>supermoons<\/strong>.<\/li>\n<li>The\u00a0<strong>height of the bore<\/strong>\u00a0is generally\u00a0<strong>greater near the banks<\/strong>\u00a0of the river than at the centre and can\u00a0<strong>travel upstream for 30 minutes<\/strong>\u00a0after the peak high tide.<\/li>\n<li>The\u00a0<strong>Mearim pororoca<\/strong>\u00a0is one of the\u00a0<strong>last remaining tidal bores<\/strong>\u00a0of significant strength in Brazil, attracting\u00a0<strong>surfers<\/strong>\u00a0and\u00a0<strong>researchers<\/strong>.<\/li>\n<\/ul>\n<h2>Mearim River &#8211; Tidal Bore FAQs<\/h2>\n<p><strong>Q1:\u00a0<\/strong>Where is the Mearim River located?<br \/>\n<strong>Ans<\/strong>: The Mearim River is located in the Maranh\u00e3o state of northeastern Brazil and flows into the Atlantic Ocean.<\/p>\n<p><strong>Q2:\u00a0<\/strong>What unique tidal phenomenon is observed in the Mearim River?<br \/>\n<strong>Ans:<\/strong>\u00a0The Mearim River is known for the tidal bore called the \u201cPororoca,\u201d where ocean tides push upstream against the river current, creating large waves.<\/p>\n<p><strong>Q3:\u00a0<\/strong>Which other rivers globally experience tidal bores like the Mearim?<br \/>\n<strong>Ans<\/strong>: Rivers like the Amazon (Brazil), Qiantang (China), and Seine (France) also exhibit tidal bores.<\/p>\n<p><strong>Source:<\/strong>\u00a0<a href=\"https:\/\/www.reuters.com\/business\/environment\/amazons-waves-weaken-surfer-fights-protect-them-2025-05-12\/\" target=\"_blank\" rel=\"nofollow noopener\">REU<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Mearim River &#8211; Tidal Bore Latest News Recently, a Brazilian surfer, known for surfing the world\u2019s longest tidal waves, uses the Mearim\u2019s pororoca to raise awareness about climate change and ecological degradation. Mearim River The\u00a0Mearim River\u00a0is a major river located in\u00a0Maranh\u00e3o state, in\u00a0northern Brazil. It\u00a0originates in southern Maranh\u00e3o\u00a0and\u00a0drains northward\u00a0into the\u00a0Ba\u00eda de S\u00e3o Marcos\u00a0(S\u00e3o Marcos Bay), &#8230; <a title=\"Mearim River &#8211; Tidal Bore\" class=\"read-more\" href=\"https:\/\/vajiramandravi.com\/current-affairs\/mearim-river-tidal-bore\/\" aria-label=\"Read more about Mearim River &#8211; Tidal Bore\" target=\"_blank\">Read more<\/a><\/p>\n","protected":false},"author":8,"featured_media":47182,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[403,21,23],"class_list":{"0":"post-47174","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-upsc-prelims-current-affairs","8":"tag-mearim-river-tidal-bore","9":"tag-prelims-pointers","10":"tag-upsc-prelims-current-affairs","11":"no-featured-image-padding"},"acf":[],"_links":{"self":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/47174","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/comments?post=47174"}],"version-history":[{"count":0,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/47174\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/47182"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=47174"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=47174"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=47174"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}