{"id":5541,"date":"2012-11-26T01:51:33","date_gmt":"2012-11-26T01:51:33","guid":{"rendered":"http:\/\/blogs.agu.org\/landslideblog\/?p=5541"},"modified":"2012-11-27T18:27:03","modified_gmt":"2012-11-27T18:27:03","slug":"rockfall-risk-assessment-reports-for-the-port-hills-christchurch-new-zealand","status":"publish","type":"post","link":"https:\/\/blogs.agu.org\/landslideblog\/2012\/11\/26\/rockfall-risk-assessment-reports-for-the-port-hills-christchurch-new-zealand\/","title":{"rendered":"Rockfall risk assessment reports for the Port Hills, Christchurch, New Zealand"},"content":{"rendered":"

\"\"<\/a>.<\/span><\/p>\n

One of the legacies of the Christchurch earthquake sequence<\/a> in New Zealand has been both increased levels of rockfall hazard<\/a> and increased awareness of the level of hazard that predated the seismic events.\u00a0 The most seriously affected area is the Port Hills area to the southeast of the city<\/a>, where large numbers of houses were affected by rockfalls<\/a> during the earthquakes, and may more were left at risk in the aftermath.\u00a0 To assess the level of hazard properly, Christchurch City Council<\/a> commissioned GNS Science<\/a> to undertake a quantitative life risk assessment for the affected areas.\u00a0 This has been a huge piece of work, undertaken in the public spotlight on a very short timescale.\u00a0 The aim has been to generate the best possible assessment of the risk to life; this assessment can then be used as the basis for decisions on the viability of individual properties.<\/p>\n

Christchurch City Council have now released the full set of reports of the rockfall life risk assessment, such that they area available for download.\u00a0 A total of seven reports are available as PDFs as follows:<\/p>\n

    \n
  1. Canterbury Earthquakes 2010\/2011 Port Hills Slope Stability: Geomorphology mapping for rockfall risk assessment<\/a><\/li>\n
  2. Canterbury Earthquakes 2010\/11 Port Hills Slope Stability: Principles and criteria for the assessment of risk from slope instability in the Port Hills, Christchurch<\/a><\/li>\n
  3. Canterbury Earthquakes 2010\/11 Port Hills Slope Stability: Pilot study for assessing life-safety risk from cliff collapse<\/a><\/li>\n
  4. Canterbury Earthquakes 2010\/11 Port Hills Slope Stability: Life-safety risk from cliff collapse in the Port Hills<\/a><\/li>\n
  5. Canterbury Earthquakes 2010\/11 Port Hills Slope Stability: Additional assessment of the life-safety risk from rockfalls (boulder rolls)<\/a><\/li>\n
  6. Canterbury Earthquakes 2010\/11 Port Hills Slope Stability: Pilot study for assessing life-safety risk from rockfalls (boulder roll)<\/a><\/li>\n
  7. Canterbury Earthquakes 2010\/11 Port Hills Slope Stability: Life-safety risk from rockfalls (boulder roll) in the Port Hills<\/a><\/li>\n
  8. Separate maps associated with the reports<\/a><\/li>\n<\/ol>\n

    The analysis presented in these reports is really fascinating – they are the most comprehensive, carefully-considered and thorough rockfall risk assessments that I have ever seen.\u00a0 I strongly commend in particular the “principles and criteria” report (number 2) and the Life safety risk reports (numbers 4 and 7).<\/p>\n

    Inevitably the political situation<\/a> with regard to implementing the outcome of these analyses is very complex, but at least there is a credible scientific analysis from which to start.<\/p>\n","protected":false},"excerpt":{"rendered":"

    A series of reports on the level of life risk from rockfalls in the Port Hills area of Christchurch in New Zealand has now been released by the council<\/p>\n","protected":false},"author":22,"featured_media":5545,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,1],"tags":[22,469,7,246,670,56],"class_list":["post-5541","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-landslide-report","category-uncategorized","tag-christchurch","tag-featured","tag-new-zealand","tag-risk","tag-risk-assessment","tag-rockfall"],"_links":{"self":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/posts\/5541","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=5541"}],"version-history":[{"count":0,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/posts\/5541\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/media\/5545"}],"wp:attachment":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/media?parent=5541"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/categories?post=5541"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/tags?post=5541"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}