Showing posts from January 8, 2012

Insurance companies on possible building delays

The Press online has a great little item, New tremors delay rebuilding, repairs, based on interviews with representatives from Lumley and VERO insurance companies.

Both discuss the impact of the most recent weeks of aftershocks, and the extent to which repairs and rebuilding will be affected. Also discussed is the possibility of increased costs, the need for reassessments in some areas (repairs may be reclassified as rebuilds), and determining the areas where work can start first.

The article ishere.

CERA survey on what people want from the rebuilt city centre

CERA are conducting an on-line Christchurch Central City Commercial Property Study of what is needed for the rebuilt city centre.

From the CERA website:
CERA is undertaking an in-depth survey to find out what property and business owners, and their customers, want from the re-built city centre.  This survey is designed to capture property owners' and users' intentions so CERA can help the government and council put the draft Christchurch Central City Plan into action. As well as seeking input from property and business owners there is also a survey for customers.
A wide range of issues are covered including where you would like to to see retail and business premises located, inner city safety, the highest level building you would be prepared to work in (and presumably be a customer in), and lots else.

The survey startshere. Give it a go. .

Community Forum - meeting agenda and notes

CERA have put the agenda and notes for Community Forum meetings on their website. The notes are a bit cryptic but show that real issues are being considered. They are here.

NOTE ADDED 12 FEB 2012: At some time in the past few weeks CERA blocked access to the page with the Community Forum material mentioned above.

Earthquake basics - Liquefaction

While on the topic of liquefaction, the EERI (Earthquake Engineering Research Institute, California) have published a pamphlet called: LIQUEFACTION: What it is and what to do about it. A detailed and intelligible explanation of liquefaction, and the hazards it poses, is provided in eight pages of text and diagrams.

The purpose of the pamphlet is descibed as:
"... The authors hope that the information presented here conveys, to policymakers in particular, that better understanding of the risk from liquefaction at a particular site or area leads to better decisions regarding mitigation options, response planning, and preparedness strategies. With good liquefaction opportunity and susceptibility maps as a starting point, public officials and private property owners can make informed decisions about how to concentrate limited resources to manage and reduce the risk."Another good read for anyone living in a TC3 zone (and Wellington!). The topics covered are:

The REAL Dirt on Liquefaction

Yesterday's post showed how earthquake damage to a small town could be carefully, and usefully, described. Knowing what happened is important for many reasons, and provides a context for all that follows.

That, in itself, is not sufficient to ensure that towns or cities are as safe as possible. While it is often heard that the liquefaction risk in Christchurch was well known, it seems to have been well known to only a small number of people. In addition to this limitation, hindsight also suggests there was little desire to commit to gaining more information, and ensuring it was widely available. The Earthquake Royal Commission will establish the extent to which this was true for the inner city, but no credible investigation seems likely on the same issues for urban areas.

Once again this is an issue better handled overseas. In 2001 ABAG (Association of Bay Area Governments, in the San Francisco Bay Area) published a document The REAL Dirt on Liquefaction: A Guide to the Liquefacti…

Describing earthquake related land damage - how the Americans do it.

The Americans, as is often the case, lead the way in sharing and explaining information. This seems to be especially so with material relating to earthquakes. In New Zealand there appears to be a mixture of reluctance to make information available, and a lack of understanding of the need for doing so.

A good example of how it could be done is a report prepared by the Unites States Geological Service (USGS) relating to earthquake damage experienced by the township of Ocean, San Luis Obispo County, California. Oceano suffered an unanticipated high level of damage as the result of a 6.5M earthquake 80km away. The major effect of the earthquake was liquefaction induced lateral spreading.

After their investigations the USGS produced a report: Liquefaction-Induced Lateral Spreading in Oceano, California, During the 2003 San Simeon Earthquake. Starting with a substantial Nontechnical Summary the report then provided detailed coverage of what happened, how, what was investigated a…