A video recording of a lecture presented by Associate Professor Misko Cubrinovski as part of the 2011 University of Canterbury Earthquake Lecture Series.
Stage IV of the Christchurch liquefaction study updated the Stage II liquefaction hazard and ground damage maps with further data collected from other organisations, and included two additional maps indicating liquefaction sensitivity to groundwater levels. Stage IVa of the Christchurch liquefaction study used revised groundwater levels and adjustments to the liquefaction prediction algorithm. The outputs of the report were liquefaction hazard and ground damage maps for both average summer (low) and average winter (high) groundwater levels. The maps produced as part of Stage IVa of the report were subsequently included in an Environment Canterbury public education poster The Solid Facts on Christchurch Liquefaction which also contained information on how liquefaction occurs and what can be done to mitigate the liquefaction hazard. Stage IV of the Christchurch liquefaction study contained a number of recommendations to improve the liquefaction potential and ground damage maps for Christchurch. See Object Overview for background and usage information.
Liquefaction silt on a grassed area in New Brighton.
Liquefaction silt. The photographer comments, "After the earthquake in Christchurch New Zealand, liquefaction covered the streets, but after it had risen from below ground whilst the ground was shaking it the liquid in the liquefaction wanted to drain away".
Dried liquefaction silt in North New Brighton. The photographer comments, "Wet liquefaction after an earthquake can soon start to dry up".
A brochure published by Environment Canterbury in January 2003, examining liquefaction and liquefaction hazard ratings.
Liquefaction silt in Bexley. The photographer comments, "This is not really a worm but a sliver of liquefaction that has fallen out of a tyre tread".
Liquefaction in North New Brighton. The photographer comments, "After the double quake local to my home, the liquefaction made strange shapes in the liquid content of the outpourings".
Dried liquefaction silt in North New Brighton. The photographer comments, "Here you can see the very fine surface layer of liquefaction starting to shrink, crack and then curl up on itself".
A brochure created by Environment Canterbury in August 2007, covering liquefaction in Christchurch and including a liquefaction map.
Liquefaction silt and sand cover the lawn of a residential property. The photographer comments, "This is a garden inundated with liquefaction. Though most liquefaction is grey in Christchurch there must have been golden sandy beaches before the volcanoes erupted millions of years ago".
Grass growing through liquefaction silt in Avondale. The photographer comments, "Although this grass seems to be growing on the liquefaction created by the earthquakes in Christchurch, New Zealand, they are actually only growing through it. Nothing seems to grow even though seeds will sprout almost anywhere else. The seeds are growing in the soil which got covered up by the liquefaction. If liquefaction gets mixed with even a little soil then nature can get a foothold".
Stage IV of the Christchurch liquefaction study updated the Stage II liquefaction hazard and ground damage maps with further data collected from other organisations, and included two additional maps indicating liquefaction sensitivity to groundwater levels. See Object Overview for background and usage information.
Liquefaction in North New Brighton. The photographer comments, "This is the liquid part of liquefaction left when the heavier sand content has dropped down. After the double quake in Christchurch local to me I found these strange lines of bubbles on the surface".
Collection Overview of 'Liquefaction Studies.'
Liquefaction and flooding in Waitaki Street, Bexley. The photographer comments, "Due to liquefaction and broken drains the water left by the liquefaction stayed in the area for over a week".
Dried liquefaction in North New Brighton. The photographer comments, "This shape formed as the liquefaction after the 23 December earthquake in Christchurch started to dry out".
Object Overview for 'Liquefaction Study Waimakariri District.'
Liquefaction in North New Brighton. The photographer comments, "This was the liquefaction pouring out of a split in the road where it joins the side-walk. The quakes felt pretty violent, but the damage was less severe than the February one. Unlucky for me the epicentre was only 9.6km away and smaller aftershocks were a lot closer".
The Christchurch liquefaction study was initiated to better determine liquefaction susceptibility in Christchurch city. It aimed to improve on earlier liquefaction susceptibility maps, which were based on soil type and distribution, by incorporating soil strength data into liquefaction analysis. This stage of the study included collating available geological and geotechnical data from Environment Canterbury and Christchurch City Council into a database, modelling liquefaction hazard and ground damage and presenting these as maps. The report contains many recommendations, which were taken up in subsequent stages of the study. (Note that the results of Stage 1 of the Christchurch liquefaction study were provided to Environment Canterbury as a letter rather than a report. This was a summary of work completed to 30 June 2001, including a review of geological and geotechnical data available within Environment Canterbury and Christchurch City Council records.) See Object Overview for background and usage information.
Object Overview of 'Christchurch liquefaction study: Stage IV.'
Object Overview for 'Liquefaction hazard in Hurunui District'
Object Overview of 'Christchurch liquefaction study – Stage II (Beca, 2002).'
A van partially submerged in liquefaction. The photographer comments, "A van that unluckily drove into a hole caused by the terrible liquefaction on Beach Road, North New Brighton during the Christchurch earthquake".
A 'sand volcano' of liquefaction silt in Bexley. The photographer comments, "Liquefaction is just a mixture of sand and water squeezed up from the ground, but with a little imagination it has a beauty in its untouched state".
Dried liquefaction silt in North New Brighton. The photographer comments, "I found this face amongst the liquefaction. It is like one of them diagrams where they segment different parts of the brain depending on their functions".
A van partially submerged in liquefaction. The photographer comments, "A van that unluckily drove into a hole caused by the terrible liquefaction on Beach Road, North New Brighton during the Christchurch earthquake".
Photograph captioned by Fairfax, "Volunteers help clean up liquefaction on Acland Avenue. Volunteer Shona Green sweeping dust from liquefaction".
Liquefaction In Brooklands.
Object Overview of 'Christchurch liquefaction study – Stage 4a (Addendum Report) (Beca, 2005).'