{"id":39427,"date":"2021-10-28T07:06:47","date_gmt":"2021-10-28T07:06:47","guid":{"rendered":"https:\/\/blogs.agu.org\/landslideblog\/?p=39427"},"modified":"2021-10-28T07:07:55","modified_gmt":"2021-10-28T07:07:55","slug":"the-21-july-2020-shaziba-landslide-at-mazhe-village-in-enshi-china","status":"publish","type":"post","link":"https:\/\/blogs.agu.org\/landslideblog\/2021\/10\/28\/the-21-july-2020-shaziba-landslide-at-mazhe-village-in-enshi-china\/","title":{"rendered":"The 21 July 2020 Shaziba landslide at Mazhe Village in Enshi, China"},"content":{"rendered":"

The 21 July 2020 Mazhe Village landslide in Enshi, China<\/h4>\n

Back in July 2020 I wrote about a landslide that had just occurred on the banks of the Qingjiang River<\/a> in Enshi Tujia and Miao Autonomous Prefecture in Hubei Province,\u00a0China<\/a>. This was a really impressive event, triggered by heavy rainfall:-<\/p>\n

\"The

The 21 July 2021 Shaziba landslide at Mazhe Village in Enshi, China. Image from China Daily<\/a>.<\/p><\/div>\n

.<\/p>\n

As the above image shows the failure, now known as the Shaziba landslide, temporarily blocked the river.\u00a0 In a paper recently published in the journal Landslides<\/a><\/em>, Xue et al.<\/em> (2021)<\/a> have investigated the precursory movement of this landslide using satellite imagery.<\/p>\n

The results are interesting.\u00a0 Their InSAR data<\/a> demonstrates that the landslide seen above is part of a much larger complex, as shown in the figure from the paper below:-<\/p>\n

\"The

The full extent of the Shaziba landslide in China, from Xue et al.<\/em> (2021)<\/a>.<\/p><\/div>\n

.<\/p>\n

The July 2020 landslide involved a volume of 250,000 cubic metres, with a length of 1,500 m, a width of up to 580 m and an average depth of 25 m.<\/p>\n

The InSAR data shows that the landslide was creeping in the years leading up to the major failure.\u00a0 The creep was seasonal, with the higher rates of movement associated with the rainy season.\u00a0 This is unsurprising – presumably the landslide was responding to elevated pore water pressures.\u00a0 Detailed analysis of the data suggests that over time the landslide was becoming more responsive to rainfall, presumably an indication of the evolution of the landslide towards failure, and a possible indicator for a warning system.<\/p>\n

Interestingly, Xue et al.<\/em> (2021)<\/a> have used InSAR to look at other slopes on the banks of the Qingjiang River, and have detected three further large landslide complexes that are showing seasonal patterns of displacement.\u00a0 These landslides, and the unfailed portion of the Shaziba landslide, now need monitoring.\u00a0 Fortunately InSAR<\/a> represents a technique through which this can be achieved if there is sufficient funding for the processing.<\/p>\n

.<\/p>\n

Reference<\/h4>\n

Xue, C., Chen, K., Tang, H.\u00a0et al.<\/i> 2021. Heavy rainfall drives slow-moving landslide in Mazhe Village, Enshi to a catastrophic collapse on 21 July 2020<\/a>. Landslides<\/i>\u00a0(2021). https:\/\/doi.org\/10.1007\/s10346-021-01782-7<\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

A new paper in the journal landslides uses InSAR data to show that the 21 July 2020 Shaziba landslide in Enshi, China was creeping in the years before the major failure <\/p>\n","protected":false},"author":22,"featured_media":39430,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[16,881,469,4898,39,192,17],"class_list":["post-39427","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-china","tag-east-asia","tag-featured","tag-insar","tag-monitoring","tag-paper","tag-research"],"_links":{"self":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/posts\/39427","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=39427"}],"version-history":[{"count":0,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/posts\/39427\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/media\/39430"}],"wp:attachment":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/media?parent=39427"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/categories?post=39427"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/tags?post=39427"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}