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Articles, Christchurch uncovered

Anyone in the office will tell you that I have a keen interest in military history, especially anything related to the World War 2 period. I like my airplanes, yes (hats off to the de Havilland Mosquito, that twin engine … Continue reading →

Images, eqnz.chch.2010

Best View - Press "L". After 36 million liters of water mysteriously disappeared from this reservoir on Huntsbury Hill following the February 22nd 6.3 earthquake in Christchurch work has started on repairing it. This image shows just how large the tank is with a work-truck parked inside it. See Video of TV3 News item:

Research Papers, Lincoln University

The 2013 Seddon earthquake (Mw 6.5), the 2013 Lake Grassmere earthquake (Mw 6.6), and the 2016 Kaikōura earthquake (Mw 7.8) provided an opportunity to assemble the most extensive damage database to wine storage tanks ever compiled worldwide. An overview of this damage database is presented herein based on the in-field post-earthquake damage data collected for 2058 wine storage tanks (1512 legged tanks and 546 flat-based tanks) following the 2013 earthquakes and 1401 wine storage tanks (599 legged tanks and 802 flat-based tanks) following the 2016 earthquake. Critique of the earthquake damage database revealed that in 2013, 39% and 47% of the flat-based wine tanks sustained damage to their base shells and anchors respectively, while due to resilience measures implemented following the 2013 earthquakes, in the 2016 earthquake the damage to tank base shells and tank anchors of flat-based wine tanks was reduced to 32% and 23% respectively and instead damage to tank barrels (54%) and tank cones (43%) was identified as the two most frequently occurring damage modes for this type of tank. Analysis of damage data for legged wine tanks revealed that the frame-legs of legged wine tanks sustained the greatest damage percentage among different parts of legged tanks in both the 2013 earthquakes (40%) and in the 2016 earthquake (44%). Analysis of damage data and socio-economic findings highlight the need for industry-wide standards, which may have socio-economic implications for wineries.

Images, Alexander Turnbull Library

A woman sits at the breakfast table reading the paper - As her husband comes through the door behind her she comments that the 'Regional Council says rural people should be checking their septic tanks!' Her husband is covered in muck and surrounded by flies - he has clearly been taking the council's advice. Refers to the news that the Canterbury Regional Council is encouraging rural residents with septic tanks to check their wastewater system for any signs of damage following September's earthquake. (Radio NZ News 5 November 2010) Both colour and black and white versions of this cartoon are available Quantity: 1 digital cartoon(s).

Audio, Radio New Zealand

Construction delays and cost over-runs are prolonging the earthquake risks facing patients and staff at Christchurch hospital. Six major hospital buildings at the central city site have been listed as earthquake prone since May, but there is no safer space to shift patients into. Christchurch Hospital boss David Meates pron; Mates says the hospital is still basically a construction site. One earthquake prone building has roof tanks containing 75 tonnes of water. Mr Meates told RNZ reporter Phil Pennington removing the water from the tanks in the meantime is not an option.

Articles, Christchurch uncovered

It came as a bit of a surprise when over 1000 fragments of broken stoneware jars were unearthed at an otherwise ordinary Christchurch archaeological site. But there, sitting under some old petrol tanks, was Christchurch history waiting to be found.What … Continue reading →

Audio, Radio New Zealand

Topics - Emergency services are at the scene of a cliff collapse at the Port of Lyttelton that has damaged fuel storage tanks. Police say evacuations are underway from Brittan Terrace and Cressy Terrace, with people being taken to Lyttelton Main School. Meanwhile - University of Canterbury researchers have confirmed that Christchurch is now experiencing more frequent and severe flooding due to the impact of the earthquakes.

Videos, UC QuakeStudies

A video capturing an aftershock from the Canterbury earthquake on 22 February 2011, 1:04pm. After the 6.3 magnitude earthquake at 12:51pm, Ben Post set up his camera on a tripod and left it running. The movement of the water in the fish tank during the quake suggests that the shaking is up and down. The camera also shows this effect; due to the lightweight material of the tripod, the camera is shaken about more than the surroundings.

Audio, Radio New Zealand

The public policy think tank, the New Zealand Initiative, says this country is still under-prepared for the next big earthquake. The group of economists has reviewed the policy response to the Canterbury earthquakes and has just released its report: Recipe for disaster: Building policy on shaky ground. It says recovery from the quakes was hindered by avoidable policy mistakes that still haven't been addressed. One of the report's co authors Dr Eric Crampton joins Susie Ferguson to discuss the issues.

Research papers, University of Canterbury Library

We present preliminary observations on three waters impacts from the Mw7.8 14th November 2016 Kaikōura Earthquake on wider metropolitan Wellington, urban and rural Marlborough, and in Kaikōura township. Three waters systems in these areas experienced widespread and significant transient ground deformation in response to seismic shaking, with localised permanent ground deformation via liquefaction and lateral spreading. In Wellington, potable water quality was impacted temporarily by increased turbidity, and significant water losses occurred due to damaged pipes at the port. The Seaview and Porirua wastewater treatment plants sustained damage to clarifier tanks from water seiching, and increased water infiltration to the wastewater system occurred. Most failure modes in urban Marlborough were similar to the 2010-2011 Canterbury Earthquake Sequence; however some rural water tanks experienced rotational and translational movements, highlighting importance of flexible pipe connections. In Kaikōura, damage to reservoirs and pipes led to loss of water supply and compromised firefighting capability. Wastewater damage led to environmental contamination, and necessitated restrictions on greywater entry into the system to minimise flows. Damage to these systems necessitated the importation of tankered and bottled water, boil water notices and chlorination of the system, and importation of portaloos and chemical toilets. Stormwater infrastructure such as road drainage channels was also damaged, which could compromise condition of underlying road materials. Good operational asset management practices (current and accurate information, renewals, appreciation of criticality, good system knowledge and practical contingency plans) helped improve system resilience, and having robust emergency management centres and accurate Geographic Information System data allowed effective response coordination. Minimal damage to the wider built environment facilitated system inspections. Note Future research will include detailed geospatial assessments of seismic demand on these systems and attendant modes of failure, levels of service restoration, and collaborative development of resilience measures.

Images, UC QuakeStudies

A motion-blurred photograph of houses, with the Port Hills in the background. The photographer comments, "This I hope gives you a feel of what it feels like in an earthquake. When you spend your whole life thinking that you and your home are built on solid ground, it can be quite a shock when you find it is not. You can feel the house shaking like a dog with a toy, rising up violently underneath you or the most gentle form which is when the ground moves gently like a wave moving under a rowing boat. It is not just the movement, you often get a rumbling sound which can precede a violent shake or can result in no movement at all. This means that some vehicles can sound like the rumbling initially and in the early days would get your heart racing. Another form of stress is when big excavators as heavy as a tank move as you can feel the ground shake from streets away, but you do not always hear the engine. For most of us the problem when the shaking starts, is wondering if this is the start of an extremely violent earthquake or will it peter out".