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Videos, UC QuakeStudies

A video of a press conference with Gerry Brownlee announcing a CERA review which will change the zoning of 270 Port Hills properties. Brownlee announces that 247 properties will change from green zoned to red zoned and 33 properties will change from red zoned to green zoned. The properties that have been rezoned red have an unacceptable level of life risk from cliff collapse and the potential of debris inundation.

Images, UC QuakeStudies

A photograph of the house number spray-painted on the footpath in front of the Locke family's property at 392 Oxford Terrace. The photographer comments, "The numbers were spray-painted in front of all the properties in the Avon Loop in order to keep track of the property number after the mailboxes were lost or removed".

Images, UC QuakeStudies

A photograph of the house number spray-painted on the footpath outside Robin Duff's property at 386 Oxford Terrace. The photographer comments, "The numbers were spray-painted in front of all the properties in the Avon Loop in order to keep track of the property number after the mailboxes were lost or removed".

Research Papers, Lincoln University

The earthquake swarm that has struck Canterbury, New Zealand from September 2010 has led to widespread destruction and loss of life in the city of Christchurch. In response to this the New Zealand government convened a Royal Commission under the Commissions of Inquiry Act 1908. The terms of reference for this enquiry were wide ranging, and included inquiry into legal and best-practice requirements for earthquake-prone buildings and associated risk management strategies. The Commission produced a final report on earthquake-prone buildings and recommendations which was made public on the 7th December 2012. Also on the 7th of December 2012 the Ministry of Business, Innovation and Employment (MBIE) released a Consultation Document that includes many of the recommendations put forward by the Royal Commission. This paper examines the evidence presented to the Royal Commission and reviews their recommendations and those of MBIE in relation to the management of earthquake-prone buildings. An analysis of the likely impacts of the recommendations and proposals on both the property market and society in general is also undertaken.

Images, UC QuakeStudies

A photograph of the house number spray-painted on the footpath in front of 390 Oxford Terrace. The photographer comments, "The numbers were spray-painted in front of all the properties in the Avon Loop in order to keep track of the property number after the mailboxes were lost or removed".

Images, UC QuakeStudies

A photograph of the house number spray-painted on the footpath in front of 372 Oxford Terrace. The photographer comments, "The numbers were spray-painted in front of all the properties in the Avon Loop in order to keep track of the property number after the mailboxes were lost or removed".

Images, UC QuakeStudies

A photograph of the house number spray-painted on the footpath in front of 396 Oxford Terrace. The photographer comments, "The numbers were spray-painted in front of all the properties in the Avon Loop in order to keep track of the property number after the mailboxes were lost or removed".

Images, UC QuakeStudies

A photograph of the house number spray-painted on the footpath in front of 398 Oxford Terrace. The photographer comments, "The numbers were spray-painted in front of all the properties in the Avon Loop in order to keep track of the property number after the mailboxes were lost or removed".

Images, UC QuakeStudies

A photograph of the house number spray-painted on the footpath in front of 422 Oxford Terrace. The photographer comments, "The numbers were spray-painted in front of all the properties in the Avon Loop in order to keep track of the property number after the mailboxes were lost or removed".

Images, UC QuakeStudies

A photograph of the house number spray-painted on the footpath in front of 424 Oxford Terrace. The photographer comments, "The numbers were spray-painted in front of all the properties in the Avon Loop in order to keep track of the property number after the mailboxes were lost or removed".

Images, UC QuakeStudies

A photograph of the house number spray-painted on the footpath in front of 388 Oxford Terrace. The photographer comments, "The numbers were spray-painted in front of all the properties in the Avon Loop in order to keep track of the property number after the mailboxes were lost or removed".

Images, UC QuakeStudies

A photograph of Robin Duff's house at 386 Oxford Terrace. The grass has been mowed, but the dead grass has not been removed. One of the windows has been boarded up with plywood. A yellow sticker on the door indicates that the access to the house is restricted. The number 386 has been spray-painted on the footpath in front of the house. The photographer comments, "The lawn was mowed as part of the maintenance project on red-zoned properties. The numbers were spray-painted in front of all the properties in the Avon Loop in order to keep track of the property number after the mailboxes were lost or removed".

Images, UC QuakeStudies

A photograph of the street number and apartment numbers at 440 Oxford Terrace spray-painted on the footpath in front. The street number is written as 466 but this is the incorrect number for this site. The photographer comments, "The numbers were spray-painted in front of all the properties in the Avon Loop in order to keep track of the property number after the mailboxes were lost or removed".

Images, UC QuakeStudies

A photograph of the Locke family's partially-deconstructed house at 392 Oxford Terrace. The photograph has been taken from the footpath in front. Wire fencing has been placed around the outside of the property. A shipping container is resting on the footpath near the right of the property. The photographer comments, "The house was deconstructed over three weeks. The materials were then stored in the shipping container until the house was reconstructed at a new site".

Research papers, University of Canterbury Library

Fine grained sediment deposition in urban environments during natural hazard events can impact critical infrastructure and properties (urban terrain) leading to reduced social and economic function and potentially adverse public health effects. Therefore, clean-up of the sediments is required to minimise impacts and restore social and economic functionality as soon as possible. The strategies employed to manage and coordinate the clean-up significantly influence the speed, cost and quality of the clean-up operation. Additionally, the physical properties of the fine grained sediment affects the clean-up, transport, storage and future usage of the sediment. The goals of the research are to assess the resources, time and cost required for fine grained sediment clean-up in an urban environment following a disaster and to determine how the geotechnical properties of sediment will affect urban clean-up strategies. The thesis focuses on the impact of fine grained sediment (<1 mm) deposition from three liquefaction events during the Canterbury earthquake sequence (2010-2011) on residential suburbs and transport networks in Christchurch. It also presents how geotechnical properties of the material may affect clean-up strategies and methods by presenting geotechnical analysis of tephra material from the North Island of New Zealand. Finally, lessons for disaster response planning and decision making for clean-up of sediment in urban environments are presented. A series of semi-structured interviews of key stakeholders supported by relevant academic literature and media reports were used to record the clean-up operation coordination and management and to make a preliminary qualification of the Christchurch liquefaction ejecta clean-up (costs breakdown, time, volume, resources, coordination, planning and priorities). Further analysis of the costs and resources involved for better accuracy was required and so the analysis of Christchurch City Council road management database (RAMM) was done. In order to make a transition from general fine sediment clean-up to specific types of fine disaster sediment clean-up, adequate information about the material properties is required as they will define how the material will be handled, transported and stored. Laboratory analysis of young volcanic tephra from the New Zealand’s North Island was performed to identify their geotechnical properties (density, granulometry, plasticity, composition and angle of repose). The major findings of this research were that emergency planning and the use of the coordinated incident management system (CIMS) system during the emergency were important to facilitate rapid clean-up tasking, management of resources and ultimately recovery from widespread and voluminous liquefaction ejecta deposition in eastern Christchurch. A total estimated cost of approximately $NZ 40 million was calculated for the Christchurch City clean-up following the 2010-2011 Canterbury earthquake sequence with a partial cost of $NZ 12 million for the Southern part of the city, where up to 33% (418 km) of the road network was impacted by liquefaction ejecta and required clearing of the material following the 22 February 2011 earthquake. Over 500,000 tonnes of ejecta has been stockpiled at Burwood landfill for all three liquefaction inducing earthquake events. The average cost per kilometre for the event clean-up was $NZ 5,500/km (4 September 2010), $NZ 11,650/km (22 February 2011) and $NZ 11,185/km (13 June 2011). The duration of clean-up time of residential properties and the road network was approximately two to three months for each of the three liquefaction ejecta events; despite events volumes and spatial distribution of ejecta. Interviews and quantitative analysis of RAMM data revealed that the experience and knowledge gained from the Darfield earthquake (4 September 2010) clean-up increased the efficiency of the following Christchurch earthquake induced liquefaction ejecta clean-up events. Density, particle size, particle shape, clay content and moisture content, are the important geotechnical properties that need to be considered when planning for a clean-up method that incorporates collection, transport and disposal or storage. The geotechnical properties for the tephra samples were analysed to increase preparedness and reaction response of potentially affected North Island cities from possible product from the active volcanoes in their region. The geotechnical results from this study show that volcanic tephra could be used in road or construction material but the properties would have to be further investigated for a New Zealand context. Using fresh volcanic material in road, building or flood control construction requires good understanding of the material properties and precaution during design and construction to extra care, but if well planned, it can be economically beneficial.

Audio, Radio New Zealand

Some Canterbury homeowners say their houses have dropped in value because the damage to their properties was inadequately assessed by the Earthquake Commission after the 2010 and 2011 earthquakes. Independent land surveyor, Adrian Cowie, and a Burwood homeowner affected by the quakes, Selwyn Stafford, talk about the issues facing them.