{"id":14639,"date":"2015-02-11T08:16:34","date_gmt":"2015-02-11T08:16:34","guid":{"rendered":"http:\/\/blogs.agu.org\/landslideblog\/?p=14639"},"modified":"2015-02-11T08:16:34","modified_gmt":"2015-02-11T08:16:34","slug":"val-parghera-1","status":"publish","type":"post","link":"https:\/\/blogs.agu.org\/landslideblog\/2015\/02\/11\/val-parghera-1\/","title":{"rendered":"Val Parghera:- A fascinating stop motion video of a large rockslide"},"content":{"rendered":"<h5>Val Parghera<\/h5>\n<p><a href=\"https:\/\/www.youtube.com\/watch?v=5-nyAz484WA\">A very nice video has been posted on Youtube,<\/a> showing a stop motion video of the movement of a large landslide in Val Parghera in Switzerland.\u00a0 This slide is <a href=\"http:\/\/www.geopraevent.ch\/timelapse-movie-val-parghera\/?lang=en\">being monitored<\/a> as part of the <a href=\"http:\/\/www.geopraevent.ch\/?lang=en\">Geopraevent programme<\/a> on behalf of the Canton of Grisons.\u00a0 <a href=\"https:\/\/www.youtube.com\/watch?v=5-nyAz484WA\">The video<\/a> captures movements of the landslide between May 2013 and January 2015:<\/p>\n<p>.<br \/>\n<iframe loading=\"lazy\" src=\"https:\/\/www.youtube.com\/embed\/5-nyAz484WA\" width=\"640\" height=\"420\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n<p>.<\/p>\n<p>There is much of interest in this film, but I&#8217;ll just point out a few things.\u00a0 First, when viewed at this speed it becomes clear that the behaviour of the Val Parghera landslide is very much like a fluid flow, even to the extent of seeing higher velocities in the lower, narrow part of the landslide.\u00a0 Second, there is a very complex coupling between the main body of the landslide and this lower portion.\u00a0 At times it appears that the lower part slides first, removing the support for the main body of the landslide, whilst at others it seems that the main portion moves, loading the lower part of the slope.\u00a0 And third, the most impressive movement event occurs at the end of March 2014 &#8211; this is a screenshot of the failure developing:<\/p>\n<p><a href=\"https:\/\/blogs.agu.org\/landslideblog\/files\/2015\/02\/15_02-Val-Parghera-1-e1423641227630.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-14640\" src=\"https:\/\/blogs.agu.org\/landslideblog\/files\/2015\/02\/15_02-Val-Parghera-1-e1423641227630.jpg\" alt=\"Val Parghera\" width=\"640\" height=\"456\" \/><\/a><\/p>\n<p>.<\/p>\n<p>I am sure that its no coincidence that this occurred at the end of the winter &#8211; one of the notable aspects is the thawing of the snow cover as the landslide movement event proceeds.\u00a0 <a href=\"http:\/\/www.geopraevent.ch\/reference-projects\/val-parghera-landslide-monitoring\/?lang=en\">According to <\/a><a href=\"http:\/\/www.geopraevent.ch\/reference-projects\/val-parghera-landslide-monitoring\/?lang=en\">Geopraeven<\/a>t, the movement event led to the closure of a local road, and a full monitoring system is now in place.\u00a0 It would be fascinating to do a full analysis of the movment patterns of this landslide along the lines of the work that we did on the Tessina landslide a decade (see <a href=\"http:\/\/www.sciencedirect.com\/science\/article\/pii\/S0169555X0400217X\">Petley <em>et al.<\/em> 2005<\/a>).<\/p>\n<h5>Reference<\/h5>\n<p><span class=\"person_name\">Petley, D. N.,<\/span> <span class=\"person_name\">Mantovani, F.<\/span> and <span class=\"person_name\">Bulmer, M. H. K.<\/span> and <span class=\"person_name\">Zannoni, F.<\/span> (2005) <a href=\"http:\/\/dx.doi.org\/10.1016\/j.geomorph.2004.09.011\">The use of surface monitoring data for the interpretation of landslide movement patterns<\/a>, <em>Geomorphology.<\/em>, 66 (1-4). pp. 133-147.<\/p>\n<p>&nbsp;<\/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>The Geopraevent team has posted a very interesting stop motion video showing movement of the Val Parghera rockslide in Switzerland over an 18 month period<!-- 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":14640,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[29],"tags":[469,963,39,136,444],"class_list":["post-14639","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-landslide-video","tag-featured","tag-landslide-video","tag-monitoring","tag-rockslide","tag-switzerland"],"_links":{"self":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/posts\/14639","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=14639"}],"version-history":[{"count":0,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/posts\/14639\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/media\/14640"}],"wp:attachment":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/media?parent=14639"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/categories?post=14639"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/tags?post=14639"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}