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Research Papers, Lincoln University

Study region: Christchurch, New Zealand. Study focus: Low-lying coastal cities worldwide are vulnerable to shallow groundwater salinization caused by saltwater intrusion and anthropogenic activities. Shallow groundwater salinization can have cascading negative impacts on municipal assets, but this is rarely considered compared to impacts of salinization on water supply. Here, shallow groundwater salinity was sampled at high spatial resolution (1.3 piezometer/km²), then mapped and spatially interpolated. This was possible due to a uniquely extensive set of shallow piezometers installed in response to the 2010–11 Canterbury Earthquake Sequence to assess liquefaction risk. The municipal assets located within the brackish groundwater areas were highlighted. New hydrological insights for the region: Brackish groundwater areas were centred on a spit of coastal sand dunes and inside the meander of a tidal river with poorly drained soils. The municipal assets located within these areas include: (i) wastewater and stormwater pipes constructed from steel-reinforced concrete, which, if damaged, are vulnerable to premature failure when exposed to chloride underwater, and (ii) 41 parks and reserves totalling 236 ha, within which salt-intolerant groundwater-dependent species are at risk. This research highlights the importance of determining areas of saline shallow groundwater in low-lying coastal urban settings and the co-located municipal assets to allow the prioritisation of sites for future monitoring and management.

Images, UC QuakeStudies

South Island Operations Manager, Jeoff Barr, loading chemical toilets into a unimog in Christchurch. CPL Eddington is on the unimog helping. The chemical toilets were delivered to residents in Christchurch who had been without water for ten days.

Images, UC QuakeStudies

South Island Operations Manager, Jeoff Barr, loading chemical toilets into a unimog in Christchurch. CPL Eddington is on the unimog helping. The chemical toilets were delivered to residents in Christchurch who had been without water for ten days.

Images, UC QuakeStudies

South Island Operations Manager, Jeoff Barr, loading chemical toilets into a unimog in Christchurch. CPL Eddington is on the unimog helping. The chemical toilets were delivered to residents in Christchurch who had been without water for ten days.

Articles, UC QuakeStudies

A PDF copy of a fact sheet about hydraulic fracturing (fracking) in the South Island created by Anglican Advocacy in 2011. The fact sheet contains information about the possible impacts of fracking on water and the risk of earthquakes.

Images, UC QuakeStudies

Hazel Hampton, a resident from one of Christchurch's eastern suburbs, filling out paperwork for a member of the New Zealand Army. Hazel Hampton is receiving a chemical toilet. Her suburb has been without water and power for over ten days.

Images, UC QuakeStudies

South Island Operations Manager, Jeoff Barr, loading chemical toilets into a unimog in Christchurch. PTE Taylor and PTE Dennis on the unimog help. The chemical toilets were delivered to residents in Christchurch who had been without water for ten days.

Images, UC QuakeStudies

South Island Operations Manager, Jeoff Barr, loading chemical toilets into a unimog in Christchurch. PTE Taylor and PTE Dennis on the unimog help. The chemical toilets were delivered to residents in Christchurch who had been without water for ten days.

Images, UC QuakeStudies

South Island Operations Manager, Jeoff Barr, loading chemical toilets into a unimog in Christchurch. PTE Taylor and PTE Dennis on the unimog help. The chemical toilets were delivered to residents in Christchurch who had been without water for ten days.

Images, UC QuakeStudies

South Island Operations Manager, Jeoff Barr, loading chemical toilets into a unimog in Christchurch. CPL Eddington and PTE Heketa are on the unimog helping. The chemical toilets were delivered to residents in Christchurch who had been without water for ten days.

Images, UC QuakeStudies

Bob Sehumacher, a resident from one of Christchurch's eastern suburbs, going over paperwork with a member of the New Zealand Army. Bob Sehumacher is receiving a chemical toilet. His suburb has been without water and power for over ten days.

Images, UC QuakeStudies

Bob Sehumacher, a resident from one of Christchurch's eastern suburbs, going over paperwork with a member of the New Zealand Army. Bob Sehumacher is receiving a chemical toilet. His suburb has been without water and power for over ten days.

Images, UC QuakeStudies

Bob Sehumacher, a resident from one of Christchurch's eastern suburbs, going over paperwork with a member of the New Zealand Army. Bob Sehumacher is receiving a chemical toilet. His suburb has been without water and power for over ten days.

Images, UC QuakeStudies

Hazel Hampton, a resident from one of Christchurch's eastern suburbs, filling out paperwork for a member of the New Zealand Army. Hazel Hampton is receiving a chemical toilet. Her suburb has been without water and power for over ten days.

Images, UC QuakeStudies

South Island Operations Manager, Jeoff Barr, loading chemical toilets into a unimog in Christchurch. PTE Taylor and PTE Dennis on the unimog help. The chemical toilets were delivered to residents in Christchurch who had been without water for ten days.

Images, UC QuakeStudies

A photograph captioned by BeckerFraserPhotos, "A section of Avonside Drive shows how the infrastructure is no longer maintained to the same level, with regard to roading, sewage and water services. The houses behind show the crazy angles that the earth movement has left them at".

Images, UC QuakeStudies

Damage to the garden of a house in Richmond. Liquefaction is visible among the plants and on the driveway. The photographer comments, "These photos show our old house in River Rd and recovery work around Richmond and St Albans. Back lawn under 10cm of water and silt".

Images, UC QuakeStudies

A power pole on the corner of Medway Street and Woodchester Avenue is on a lean, standing in a puddle of water and liquefaction silt. In the foreground road cones surround a pile of silt. The photographer comments, "Intersection of Medway St with Woodchester Ave and Flesher Ave, 10 days after the February quake".