{"id":27766,"date":"2018-05-23T23:46:36","date_gmt":"2018-05-23T23:46:36","guid":{"rendered":"https:\/\/blogs.agu.org\/landslideblog\/?p=27766"},"modified":"2018-05-23T23:46:36","modified_gmt":"2018-05-23T23:46:36","slug":"hidroituango-dam-site-3","status":"publish","type":"post","link":"https:\/\/blogs.agu.org\/landslideblog\/2018\/05\/23\/hidroituango-dam-site-3\/","title":{"rendered":"News and satellite imagery of the Hidroituango dam site"},"content":{"rendered":"<h4>Satellite imagery of the Hidroituango dam site<\/h4>\n<p>Today&#8217;s news from the <a href=\"https:\/\/blogs.agu.org\/landslideblog\/2018\/05\/21\/hidroituango-crisis-2\/\">Hidroituango dam site<\/a> is that the c<a href=\"https:\/\/noticias.caracoltv.com\/hidroituango-en-emergencia\/la-hora-crucial-las-500-pm-se-sabra-si-cambia-la-alerta-en-tres-municipios-por-hidroituango-ie137\">rest of the dam has now reached the spillway level<\/a>, meaning that the water level can be controlled from this point onward.\u00a0 That greatly reduces the risk, such that the crisis should now start to abate.\u00a0 Of course the problems will leave a legacy of severe damage, but hopefully that can be repaired.\u00a0 At the moment 26,000 people remain displaced by the emergency.<\/p>\n<p>Meanwhile, <a href=\"https:\/\/api.planet.com\/\">Planet Labs<\/a> has collected imagery of the site throughout, which provides significant insight into the problems.\u00a0 So lets start with an image collected on 26th March:-<\/p>\n<div id=\"attachment_27771\" style=\"width: 650px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-27771\" class=\"wp-image-27771 size-full\" src=\"https:\/\/blogs.agu.org\/landslideblog\/files\/2018\/05\/18_05-ituango-4-e1527117201517.jpg\" alt=\"Hidroituango dam site\" width=\"640\" height=\"364\" \/><p id=\"caption-attachment-27771\" class=\"wp-caption-text\"><a href=\"https:\/\/api.planet.com\">Planet Labs<\/a> image dated 26th March 2018 showing the Hidroituango dam site<\/p><\/div>\n<p>.<\/p>\n<p>The dam can be seen at the top of the image.\u00a0 At the bottom the river can be seen.\u00a0 The location at which it has been blocked, and this is flowing into the tunnels, is clear.\u00a0 Now lets hop forward to 8th April 2018:-<\/p>\n<div id=\"attachment_27776\" style=\"width: 650px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-27776\" class=\"wp-image-27776 size-full\" src=\"https:\/\/blogs.agu.org\/landslideblog\/files\/2018\/05\/18_05-ituango-5-e1527117466757.jpg\" alt=\"Hidroituango dam site\" width=\"640\" height=\"362\" \/><p id=\"caption-attachment-27776\" class=\"wp-caption-text\"><a href=\"https:\/\/api.planet.com\">Planet Labs<\/a> image dated 8th April 2018 of the Didroituango dam site.<\/p><\/div>\n<p>.<\/p>\n<p>The major change is that impoundment has commenced, and the water level behind the dam is clearly rising.\u00a0 The first sign of a problem appears on 2nd May 2018, but is better captured in this image dated 7th May 2018:-<\/p>\n<div id=\"attachment_27781\" style=\"width: 650px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-27781\" class=\"wp-image-27781 size-full\" src=\"https:\/\/blogs.agu.org\/landslideblog\/files\/2018\/05\/18_05-ituango-6-e1527117746278.jpg\" alt=\"Hidroituango dam site.\" width=\"640\" height=\"365\" \/><p id=\"caption-attachment-27781\" class=\"wp-caption-text\"><a href=\"https:\/\/api.planet.com\">Planet Labs<\/a> image dated 7th May 2018 of the Hidroituango dam site.<\/p><\/div>\n<p>.<\/p>\n<p>The major issue is the crater that has formed above the tunnel that was being used to control the water flow.\u00a0 This crater can be clearly seen just to the right of the lake at the bottom of the image, partially destroying a track with switchbacks.\u00a0 It appears that the tunnel collapsed, creating the blockage and this surface feature.\u00a0 Note also the significant landslide on the same side of the lake, presumably caused by the rising water level.<\/p>\n<p>By 17th May the water level has risen so much that the crater has been drowned.<\/p>\n<div id=\"attachment_27786\" style=\"width: 650px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-27786\" class=\"size-full wp-image-27786\" src=\"https:\/\/blogs.agu.org\/landslideblog\/files\/2018\/05\/18_05-ituango-7-e1527118200627.jpg\" alt=\"Hidroituango dam site\" width=\"640\" height=\"363\" \/><p id=\"caption-attachment-27786\" class=\"wp-caption-text\"><a href=\"https:\/\/api.planet.com\">Planet Labs<\/a> image dated 17th May 2018 of the Hidroituango dam site.<\/p><\/div>\n<p>.<\/p>\n<p>It is also possible to see the water being discharged at the foot of the dam.<\/p>\n<h4>Reference<\/h4>\n<p>Planet Team (2018). Planet Application Program Interface: In Space for Life on Earth. San Francisco, CA.\u00a0<a href=\"https:\/\/api.planet.com\/\">https:\/\/api.planet.com<\/a><\/p>\n<!-- AddThis Advanced Settings generic via filter on the_content --><!-- AddThis Share Buttons generic via filter on the_content -->","protected":false},"excerpt":{"rendered":"<p>Satellite images captured by Planet Labs shows the evolving crisis at the Hidroituango dam site. The dam crest has now reached the spillway level, meaning that control of the water should become possible. 26,000 people remain displaced<!-- AddThis Advanced Settings generic via filter on wp_trim_excerpt --><!-- AddThis Share Buttons generic via filter on wp_trim_excerpt --><\/p>\n","protected":false},"author":22,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7203],"tags":[359,71,469,898,122],"class_list":["post-27766","post","type-post","status-publish","format-standard","hentry","category-planet-labs","tag-colombia","tag-dam","tag-featured","tag-planet","tag-south-america"],"_links":{"self":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/posts\/27766","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/users\/22"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/comments?post=27766"}],"version-history":[{"count":0,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/posts\/27766\/revisions"}],"wp:attachment":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/media?parent=27766"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/categories?post=27766"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/tags?post=27766"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}