{"id":6403,"date":"2013-05-12T00:06:56","date_gmt":"2013-05-12T00:06:56","guid":{"rendered":"http:\/\/blogs.agu.org\/landslideblog\/?p=6403"},"modified":"2013-05-12T00:06:57","modified_gmt":"2013-05-12T00:06:57","slug":"the-wenchuan-earthquake-five-years-on","status":"publish","type":"post","link":"https:\/\/blogs.agu.org\/landslideblog\/2013\/05\/12\/the-wenchuan-earthquake-five-years-on\/","title":{"rendered":"The Wenchuan earthquake, five years on"},"content":{"rendered":"<p><a href=\"https:\/\/blogs.agu.org\/landslideblog\/2013\/05\/12\/the-wenchuan-earthquake-five-years-on\/minolta-digital-camera-36\/\" rel=\"attachment wp-att-6404\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-6404\" title=\"MINOLTA DIGITAL CAMERA\" src=\"https:\/\/blogs.agu.org\/landslideblog\/files\/2013\/05\/09_03-August-2008-aftershock-e1368316158226.jpg\" alt=\"\" width=\"640\" height=\"499\" \/><\/a><\/p>\n<p>..<\/p>\n<p>Five years ago today, on 12th May 2008, Sichuan Province was struck by the devastating M=7.9 Wenchuan earthquake.\u00a0 This earthquake was the landslide event of a generation, with over 60,000 slides being triggered, causing over 20,000 of the 80,000 fatalities.\u00a0 In the aftermath of the earthquake the army fought a desperate battle to drain the barrier lake at Tangjiashan, which threatened a million people.<\/p>\n<p>Today I am in Chengdu attending a conference to mark the anniversary of the earthquake.\u00a0 The meeting, organised by the Chengdu University of Technology, aims to share information about earthquake-induced landslides.\u00a0 Meanwhile, the Chair of the conference, Professor Runqiu Huang, <a href=\"http:\/\/www.nature.com\/ngeo\/journal\/v6\/n5\/full\/ngeo1806.html\">has written a really nice article in the current edition of Nature Geoscience<\/a> (Huang and Fan 2013) about the landslides triggered by the earthquake.\u00a0 Unfortunately it is behind a paywall. \u00a0 Part of the paper reflects upon the unexpected or unanticipated dimensions of the landslide problem.\u00a0 Three key themes emerge:<\/p>\n<ul>\n<li>&#8220;Not enough attention was paid to the cascade of geohazards following the earthquake&#8221;.\u00a0 The paper argues that, in particular, the barrier lakes caused a huge problem, which drained resources from the emergency effort.<\/li>\n<li>&#8220;The longer-term effects of a similar cascade of potential hazards were not fully taken into account in the post-seismic hazard assessment and in the selection of sites for the reconstruction of destroyed buildings&#8221;. In the aftermath of the earthquake newly-constructed towns were flooded when post-seismic debris flows blocked rivers.\u00a0 Elevated levels of landslide activity are expected to persist for anothertwo decades.<\/li>\n<li>&#8220;The long-term impact of the 2008 Wenchuan earthquake on sediment flux in the affected watersheds was also underestimated initially&#8221;. The ways that rivers respond to the additional sediment load produced by the earthquake are complex, but very often the bed aggrades, leading to floods.\u00a0 This means that the effects of the earthquake can extend beyond the area affected by shaking.<\/li>\n<\/ul>\n<p>In coming years we will see further earthquakes in mountain areas, with similar effects.\u00a0 We have gained a huge amount of knowledge from Wenchuan, albeit at a terribly high cost in human lives.\u00a0 I wonder though whether our improved knowledge is really leading to better preparedness for the next big event.<\/p>\n<p><strong>Reference<\/strong><\/p>\n<p><span class=\"Z3988\" title=\"ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.jtitle=Nature+Geoscience&amp;rft_id=info%3Adoi%2F10.1038%2Fngeo1806&amp;rfr_id=info%3Asid%2Fresearchblogging.org&amp;rft.atitle=The+landslide+story&amp;rft.issn=1752-0894&amp;rft.date=2013&amp;rft.volume=6&amp;rft.issue=5&amp;rft.spage=325&amp;rft.epage=326&amp;rft.artnum=http%3A%2F%2Fwww.nature.com%2Fdoifinder%2F10.1038%2Fngeo1806&amp;rft.au=Huang%2C+R.&amp;rft.au=Fan%2C+X.&amp;rfe_dat=bpr3.included=1;bpr3.tags=Geosciences%2Clandslide+rockfall+mass+movement\">Huang, R., &amp; Fan, X. (2013). The landslide story <span style=\"font-style: italic;\">Nature Geoscience, 6<\/span> (5), 325-326 DOI: <a href=\"http:\/\/dx.doi.org\/10.1038\/ngeo1806\" rev=\"review\">10.1038\/ngeo1806<\/a><\/span><\/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>Five years ago today the Wenchuan earthquake struck in China.  This post reports on a new paper that reflects on what we have learnt from this event<!-- 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":6404,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[537],"tags":[16,37,23,469,132,131],"class_list":["post-6403","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-earthquake-induced-landslide","tag-china","tag-conference","tag-earthquake","tag-featured","tag-sichuan","tag-wenchuan"],"_links":{"self":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/posts\/6403","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=6403"}],"version-history":[{"count":0,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/posts\/6403\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/media\/6404"}],"wp:attachment":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/media?parent=6403"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/categories?post=6403"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/tags?post=6403"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}