BeckerFraserPhotos September 2011 photograph 690

Images, UC QuakeStudies

Photograph captioned by BeckerFraserPhotos, "NG Cafe, Madras Street".

Julia Holden's 2014 Photographs 02

Images, UC QuakeStudies

A photograph of damaged buildings next to NG Gallery on Madras Street.

Julia Holden's 2014 Photographs 01

Images, UC QuakeStudies

A photograph of damaged buildings next to NG Gallery on Madras Street.

Shermine Kwok Photograph 39

Images, UC QuakeStudies

A photograph of the NG Building on Madras Street.

Umut Akguzel Photograph 483

Images, UC QuakeStudies

A photograph of a diesel tank on Madras Street. The NG Gallery can be seen in the background.

BeckerFraserPhotos September 2011 photograph 691

Images, UC QuakeStudies

Photograph captioned by BeckerFraserPhotos, "Madras Street".

Bag-O-Love Photograph 1

Images, UC QuakeStudies

A photograph of a heart-shaped bag created by Jane Quigley. The bag is hanging from a post in the NG Gallery car park.

New Zealand Defence Force photograph 800

Images, UC QuakeStudies

PTE Tea Glbert 2/1RNZIR and CFC Ng Evan, Singapore Air Force, guarding a cordon on the corner of Tuam and Durham Streets at dusk.

Mapping shallow groundwater salinity in a coastal urban setting to assess …

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.