{"id":627,"date":"2008-06-09T12:12:00","date_gmt":"2008-06-09T12:12:00","guid":{"rendered":"http:\/\/blogs.agu.org\/landslideblog\/2008\/06\/09\/erosion-on-the-lower-parts-of-the-tangjiashan-dam\/"},"modified":"2010-10-21T13:55:17","modified_gmt":"2010-10-21T17:55:17","slug":"erosion-on-the-lower-parts-of-the-tangjiashan-dam","status":"publish","type":"post","link":"https:\/\/blogs.agu.org\/landslideblog\/2008\/06\/09\/erosion-on-the-lower-parts-of-the-tangjiashan-dam\/","title":{"rendered":"Erosion on the lower parts of the Tangjiashan dam"},"content":{"rendered":"

Two days ago I posted this picture AP image of the channel at Tangjiashan:<\/p>\n

\"\"<\/a> AP image<\/a> captioned:<\/span> Water from the Tangjiashan “quake lake” flows down a landslide site in the quake-devastated Mianyang City, southwest China’s Sichuan Province.<\/span><\/span><\/span>
<\/span><\/span><\/div>\n


<\/span><\/span>Today, the following Reuters image has been released, apparently showing the same location:<\/p>\n

\"\"<\/a>Reuters image entitled: Water flows through a sluice channel of the Tangjiashan quake lake in Tangjiashan, Sichuan Province June 8, 2008 in this picture distributed by China’s official Xinhua News Agency. The water level in the quake lake stood at 741.82 metres above sea level at midday on Sunday, still 1.45 metres higher than the sluice, with the lake’s volume exceeding 240 million cubic metres, Xinhua News Agency reported. Picture taken June 8, 2008.<\/span><\/span><\/div>\n

The caption says that the picture was taken yesterday. Clearly there was massive erosion on the downslope face. The flow yesterday was reported as c. 10 cumecs, whereas today it is estimated to be 50 cumecs. If these dates are correct then the erosion rate must now be very rapid.<\/p>\n

A further image shows the site from above:<\/p>\n

\"\"<\/a>Reuters image entitled: Water flows through a sluice channel (R) of the Tangjiashan quake lake as another channel is being constructed in Tangjiashan, Sichuan Province June 8, 2008 in this picture distributed by China’s official Xinhua News Agency. The water level in the quake lake stood at 741.82 metres above sea level at midday on Sunday, still 1.45 metres higher than the sluice, with the lake’s volume exceeding 240 million cubic metres, Xinhua News Agency reported.<\/span><\/span><\/div>\n

Note two things here. First, the magnitude of the erosion. Second, as suspected yesterday, the team on the dam appears to have filled in the channel that they cut before <\/a>(see the bulldozers on the left – compare this with the first picture (above) in this post).<\/p>\n

The critical issue is how quickly this erosion is moving upslope. I suspect rather rapidly now as the flow in the channel increases and the water level in the lake rises.<\/p>\n","protected":false},"excerpt":{"rendered":"

Two days ago I posted this picture AP image of the channel at Tangjiashan: AP image captioned: Water from the Tangjiashan “quake lake” flows down a landslide site in the quake-devastated Mianyang City, southwest China’s Sichuan Province. Today, the following Reuters image has been released, apparently showing the same location: Reuters image entitled: Water flows through a sluice channel of the Tangjiashan quake lake in Tangjiashan, Sichuan Province June 8, …<\/p>\n","protected":false},"author":22,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_members_access_role":[],"_members_access_error":""},"categories":[1],"tags":[333,16,23,15,132],"class_list":["post-627","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-333","tag-china","tag-earthquake","tag-landslide-dam","tag-sichuan"],"_links":{"self":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/posts\/627","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=627"}],"version-history":[{"count":0,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/posts\/627\/revisions"}],"wp:attachment":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/media?parent=627"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/categories?post=627"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/tags?post=627"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}