{"id":3058,"date":"2014-09-24T13:07:38","date_gmt":"2014-09-24T18:07:38","guid":{"rendered":"http:\/\/sciencemediacentre.ca\/site\/?p=3058"},"modified":"2014-09-24T09:37:26","modified_gmt":"2014-09-24T14:37:26","slug":"upside-down-water-flows-keep-the-fraser-canyon-steep","status":"publish","type":"post","link":"http:\/\/sciencemediacentre.ca\/site\/upside-down-water-flows-keep-the-fraser-canyon-steep\/","title":{"rendered":"\u2018Upside-down\u2019 water flows keep the Fraser Canyon steep<img src=\"http:\/\/sciencemediacentre.ca\/site\/wp-content\/uploads\/2014\/01\/canada_flag_icon_small.gif\">"},"content":{"rendered":"<div id=\"attachment_3059\" style=\"width: 410px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/sciencemediacentre.ca\/site\/wp-content\/uploads\/2014\/09\/DSC_0265.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-3059\" class=\"size-full wp-image-3059\" src=\"http:\/\/sciencemediacentre.ca\/site\/wp-content\/uploads\/2014\/09\/DSC_0265.jpg\" alt=\"Using a raft-mounted acoustic device (bottom right) that measures water speeds by means of sound waves, researchers have found that parts of the Fraser River flow faster on the bottom than on the top, the opposite of the expected situation. (Photo credit: Jeremy Venditti)\" width=\"400\" height=\"262\" srcset=\"http:\/\/sciencemediacentre.ca\/site\/wp-content\/uploads\/2014\/09\/DSC_0265.jpg 400w, http:\/\/sciencemediacentre.ca\/site\/wp-content\/uploads\/2014\/09\/DSC_0265-300x196.jpg 300w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/a><p id=\"caption-attachment-3059\" class=\"wp-caption-text\">Using a raft-mounted acoustic device (bottom right) that measures water speeds by means of sound waves, researchers have found that parts of the Fraser River flow faster on the bottom than on the top, the opposite of the expected situation. (Photo credit: Jeremy Venditti)<\/p><\/div>\n<p>A new study shows water in certain stretches of the 542-kilometre Fraser Canyon in British Columbia is flowing \u2018upside-down\u2019, a discovery that\u00a0helps explain why the canyon walls remain so steep.<\/p>\n<p>Researchers\u00a0discovered that high velocity water flows down into deep pools and then upwells along the canyon walls, such that the water along the bottom flowing faster than at the top.\u00a0They\u00a0employed a raft-mounted acoustic device that used the Doppler effect from sound waves to determine how fast water flows at various points and depths along the Fraser River.<\/p>\n<p>This is the opposite to most rivers, where the water near the bottom is slowed by friction. The fast-moving flow scours the bottom and sides of the canyon rather than depositing sediment as slower-moving water would; this keeps the cliffs sheer.<\/p>\n<p>The hydraulic study helps us understand the critical role of climate-linked processes like erosion in forming mountain ranges, which in turn affect the climate and soil conditions for those living near them.<\/p>\n<p><span style=\"text-decoration: underline;\"><a href=\"http:\/\/dx.doi.org\/10.1038\/nature13779\" target=\"_blank\">Original research paper<\/a><\/span>\u00a0published in the journal\u00a0<em>Nature<\/em><span style=\"color: #000000;\">\u00a0<\/span>on\u00a0<strong>September 24, 2014<\/strong>.<\/p>\n<p><span style=\"text-decoration: underline;\"><em><strong>Names and affiliations of selected\u00a0authors<\/strong><\/em><\/span><\/p>\n<h4 dir=\"ltr\">Colin Rennie, University of Ottawa, Ontario<\/h4>\n<h4 dir=\"ltr\">Jeremy Venditti, Simon Fraser University, British Columbia<\/h4>\n","protected":false},"excerpt":{"rendered":"<p>A new study shows water in certain stretches of the 542-kilometre Fraser Canyon in British Columbia is flowing \u2018upside-down\u2019, a discovery that\u00a0helps explain why the canyon walls remain so steep. Researchers\u00a0discovered that high velocity water flows down into deep pools and then upwells along the canyon walls, such that the water along the bottom flowing [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":3059,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[25],"tags":[125,31,171,215,1457,50],"class_list":["post-3058","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-paper-of-interest","tag-british-columbia","tag-climate-change","tag-ecology","tag-environment","tag-geology","tag-ontario"],"jetpack_featured_media_url":"http:\/\/sciencemediacentre.ca\/site\/wp-content\/uploads\/2014\/09\/DSC_0265.jpg","jetpack_shortlink":"https:\/\/wp.me\/p4DqbN-Nk","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/posts\/3058","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/comments?post=3058"}],"version-history":[{"count":1,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/posts\/3058\/revisions"}],"predecessor-version":[{"id":3061,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/posts\/3058\/revisions\/3061"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/media\/3059"}],"wp:attachment":[{"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/media?parent=3058"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/categories?post=3058"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/tags?post=3058"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}