{"id":7224,"date":"2013-11-08T09:06:34","date_gmt":"2013-11-08T09:06:34","guid":{"rendered":"http:\/\/blogs.agu.org\/landslideblog\/?p=7224"},"modified":"2013-11-08T09:06:34","modified_gmt":"2013-11-08T09:06:34","slug":"landslides-and-typhoon-haiyan","status":"publish","type":"post","link":"https:\/\/blogs.agu.org\/landslideblog\/2013\/11\/08\/landslides-and-typhoon-haiyan\/","title":{"rendered":"Landslides and typhoon Haiyan"},"content":{"rendered":"

As I write typhoon Haiyan is tracking across the Philippines.\u00a0 Jeff Masters reports that this is likely to be the most intense landfalling tropical cyclone on record<\/a>; as such the damage on the areas affected is likely to be extreme.\u00a0 As I have noted previously<\/a>, whilst it is the wind that tends to grab the attention of the media (and wind speeds of 310 km\/h are clearly devastating), most of the damage is done by water<\/a>, in the form of the storm surge, waves, floods and landslides.\u00a0 In terms of the latter, unfortunately the island of Leyte, across which the storm has just tracked, is very landslide prone.\u00a0 Indeed, Leyte was the location of one of the most devastating landslides in recent times, when the Guinsaugon landslide of 2006<\/a> caused 1126 deaths:<\/p>\n

\"Leyte<\/a>

Photo by Lance Cpl. Raymond D. Petersen III<\/p><\/div>\n

Interestingly, the Guinsaugon landslide occurred as a result of ten days of rainfall that deposited over 2,000 mm of precipitation in total.\u00a0 Typhoon Haiyan is also likely to bring very high rainfall totals, although the high rate of movement of the storm means that durations should hopefully be comparatively short.\u00a0 This is a simulation of rainfall totals along the track of the storm from NOAA<\/a>:<\/p>\n

\"Typhoon<\/a>

NOAA: http:\/\/www.emc.ncep.noaa.gov\/HWRF\/WestPacific\/HAIYAN31W\/<\/p><\/div>\n

Note that the forecast from Typhoon Haiyan is for a peak total of 52.5 inches (1300 mm).\u00a0 Taking Leyte alone (and that is not the only part of the Philippines to be affected by this storm), landslide hazard levels are very high.\u00a0 This is a rainfall induced landslide hazard map, from the National Mapping and Resource Information Agency<\/a>, for Leyte:<\/p>\n

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

Note in particular the very high levels of hazard on the eastern-facing slopes of the upland areas.\u00a0 Due to the orographic effects, these areas are likely to have received extremely high rainfall totals.\u00a0 It would be a surprise to me if there are not very serious landslide problems in this area.\u00a0 A general idea of what might be expected from Typhoon Haiyan can be gained from revisiting the typhoon Bopha \/ Pablo disaster,<\/a> also in the Philippines, of December 2012.\u00a0 We may well not get a proper idea of the magnitude of the losses in the upland areas of Leyte until tomorrow; I suspect that the impacts will be very serious.<\/p>\n","protected":false},"excerpt":{"rendered":"

Typhoon Haiyan has made landfall in the Philippines. The affected area is highly landslide prone, suggesting that mudslides may be a major problem<\/p>\n","protected":false},"author":22,"featured_media":7227,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[469,959,252,53,975],"class_list":["post-7224","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-landslide-report","tag-featured","tag-landslide-report","tag-philippines","tag-tropical-cyclone","tag-typhoon"],"_links":{"self":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/posts\/7224","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=7224"}],"version-history":[{"count":0,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/posts\/7224\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/media\/7227"}],"wp:attachment":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/media?parent=7224"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/categories?post=7224"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/tags?post=7224"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}