{"id":15879,"date":"2015-08-24T05:00:22","date_gmt":"2015-08-24T05:00:22","guid":{"rendered":"http:\/\/blogs.agu.org\/landslideblog\/?p=15879"},"modified":"2015-08-23T16:47:34","modified_gmt":"2015-08-23T16:47:34","slug":"latin-america-and-the-caribbean-1","status":"publish","type":"post","link":"https:\/\/blogs.agu.org\/landslideblog\/2015\/08\/24\/latin-america-and-the-caribbean-1\/","title":{"rendered":"My new paper: human losses from landslides in Latin America and the Caribbean"},"content":{"rendered":"
Regional trends and controlling factors of fatal landslides in Latin America and the Caribbean<\/span><\/h5>\n

Together with my colleague and friend Sergio Sepulveda<\/a> from the University of Chile<\/a>, I have just had a paper (Sepulveda and Petley 2015<\/a>) published in the journal Natural Hazards and Earth System Sciences<\/a> on human losses from landslides in the Caribbean and Latin America.\u00a0 The paper is open access, so it is free to download<\/a>.<\/p>\n

The paper re-examines a component of the dataset that I analysed in my global landslide losses paper (Petley 2012) a few years ago.\u00a0 However, in this case we have improved the dataset by enhancing the landslide search algorithm to include local information, and we have extended the time period to the ten year spell from January 2004 to December 2013.\u00a0 This means that we now have a much better picture of human landslide losses in this region.<\/p>\n

I don’t want to rewrite the paper here, so I’ll provide the headlines and give a little more detail on an interesting aspect.\u00a0 Over the ten year period we have recorded a total of 11,631 deaths from landslides in 611 landslide events.\u00a0 Those locations with the highest losses are parts of the Caribbean (Haiti is especially significant), parts of Central America, Colombia, and SE Brazil, as the map below, taken from the paper, shows.\u00a0 Each black dot is a single landslide; the underlying base map shows the height of the terrain.<\/span>
\n<\/span><\/p>\n

 <\/p>\n

\"Latin<\/a>

Sepulveda and Petley (2015)<\/a><\/p><\/div>\n

.<\/p>\n

We have looked at the factors that explain this distribution.\u00a0 We have found that the best algorithm is a simple combination of terrain gradient (i.e. slope), mean annual rainfall and population density:<\/p>\n

\"Latin<\/a>

Sepulveda and Petley (2015)<\/a><\/p><\/div>\n

.<\/p>\n

This simple algorithm actually does a remarkable job of explaining (and predicting) the fatality-inducing landslide distribution. I think this might open the opportunity to explore future patterns of loss, if we know how population will change and we can model future rainfall patterns.\u00a0 This would be an interesting follow-on study, and would make a great PhD project if anyone is interested.<\/p>\n

A key caveat to this study though is that the 10 year period that we studied did not include a very large El Nino event.\u00a0 In the last large one (1997-8) there were extensive landslides in this region.\u00a0 We might expect to see a repeat in the next large El Nino, and the distribution may change too.\u00a0 Of course it appears that such a large El Nino, possibly the largest recorded to date, is currently developing.\u00a0 The next 12 months or so will be very interesting in this part of the world.<\/p>\n

References<\/h5>\n

Petley, D.N. 2012. Global patterns of loss of life from landslides<\/a>. Geology<\/em> 40 <\/strong>(10), 927-930.\u00a0 See also my blog post about this paper<\/a>.<\/p>\n

Sep\u00falveda, S.A. and Petley, D.N. 2015. Regional trends and controlling factors of fatal landslides in Latin America and the Caribbean<\/a>. Natural Hazards and Earth System Sciences<\/em>, 15<\/strong>, 1821-1833, doi:10.5194\/nhess-15-1821-2015<\/a>. The full paper available to download as a PDF<\/a>.<\/p>\n

 <\/p>\n

 <\/p>\n

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

In my latest paper, written with Sergio Sepulveda, Regional trends and controlling factors of fatal landslides in Latin America and the Caribbean, we look at ten years of human losses from landslides across this key area of the world.<\/p>\n","protected":false},"author":22,"featured_media":15889,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_members_access_role":[],"_members_access_error":""},"categories":[740,544],"tags":[173,469,934,938,184,122],"class_list":["post-15879","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-landslide-costs","category-review-of-a-paper","tag-caribbean","tag-featured","tag-landslide-database-paper","tag-latin-america","tag-review","tag-south-america"],"_links":{"self":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/posts\/15879","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=15879"}],"version-history":[{"count":0,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/posts\/15879\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/media\/15889"}],"wp:attachment":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/media?parent=15879"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/categories?post=15879"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/tags?post=15879"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}