{"id":7756,"date":"2014-01-13T08:04:28","date_gmt":"2014-01-13T08:04:28","guid":{"rendered":"http:\/\/blogs.agu.org\/landslideblog\/?p=7756"},"modified":"2014-01-13T08:04:28","modified_gmt":"2014-01-13T08:04:28","slug":"dart-valley-landslide","status":"publish","type":"post","link":"https:\/\/blogs.agu.org\/landslideblog\/2014\/01\/13\/dart-valley-landslide\/","title":{"rendered":"The Dart Valley landslide in New Zealand"},"content":{"rendered":"
Dart Valley Landslide<\/h5>\n

In the last two weeks there has been some interest in New Zealand in a landslide that blocked the Dart Valley on South Island<\/a> on 4th January, creating a large lake.\u00a0 Initially there was some concern that this landslide dam might suffer a breach event, but fortunately the water overtopped the landslide deposit without a major failure.\u00a0 The landslide is a well-known feature (GNS have a long-standing image of it on their website<\/a>), situated in the\u00a0Te Koroka \/ slip stream area, and located at -44.587,168.332.\u00a0 It is easily identifiable on Google Earth from an image in August 2011:<\/p>\n

\"Dart<\/a><\/p>\n

..<\/p>\n

The January 2014 movement event is just the most recent of a succession of landslides at this site – it has even been written up in a GNS Science report (Thomas and Cox 2009), although sadly I cannot find this online.\u00a0 Several news stories have good images of the landslide during this recent event, including this one from The Press<\/a>:<\/p>\n

\"Dart<\/a>

http:\/\/www.stuff.co.nz\/the-press\/news\/9581270\/Landslide-blocks-Dart-River<\/p><\/div>\n

..<\/p>\n

The lake that developed reached a maximum length of over 3 km<\/a> and is over 20 m deep.\u00a0 Aerial imagery suggests that this is quite an impressive feature:<\/p>\n

\"Dart<\/a>

http:\/\/www.scene.co.nz\/new-track-around-dart-valley-lake–\/314404a1.page<\/p><\/div>\n

..<\/p>\n

The major impacts of the landslide has been the inundation of a hiking track along the valley, which has now been rerouted<\/a>, and temporary suspension of jet-boating downstream<\/a>.\u00a0 The landslide dam is not considered to pose a major risk.<\/a>\u00a0 However, the silt generated by the erosion of the landslide has also caused the colour of the water in Lake Wakatipu<\/a> to change to a blue-green colour.<\/p>\n

Finally, there is a lovely gallery of images of the landslide and the valley below from two years ago located here,<\/a> and another one can be found here<\/a>.<\/p>\n

Reference<\/strong><\/h5>\n

Thomas, J.S. and Cox, S,C. 2009. 42 years Evolution of Slip Stream Landslide and Fan, Dart River, New Zealand. GNS Science Report Sr 09\/43, 32 pp.<\/p>\n","protected":false},"excerpt":{"rendered":"

Over the last two weeks, a landslide in the Dart Valley of New Zealand has created a lake over 3 km long, although a major breach event is not expected<\/p>\n","protected":false},"author":22,"featured_media":7757,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[469,15,959,7],"class_list":["post-7756","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-landslide-report","tag-featured","tag-landslide-dam","tag-landslide-report","tag-new-zealand"],"_links":{"self":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/posts\/7756","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=7756"}],"version-history":[{"count":0,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/posts\/7756\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/media\/7757"}],"wp:attachment":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/media?parent=7756"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/categories?post=7756"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/tags?post=7756"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}