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Research Papers, Lincoln University

At 00:02 on 14 November, 2016 a destructive 7.8 Mw earthquake struck the North Canterbury region of New Zealand’s South Island. Prior to and following the earthquake, natural and social scientists conducted a significant amount of research on the resilience processes and recovery efforts in North Canterbury. This thesis examines community resilience in Kaikōura, a small town and district greatly impacted by the earthquake. Community resilience has been widely used in disaster risk reduction research, policy, and practice to describe how a group of individuals within a boundary respond to events, hazards, and shifts in their everyday life. Using exploratory inquiry, this thesis adopts qualitative research methods including document analysis, 24 semi-structured interviews, and participant observation to explore the idea that the recent scholarly emphasis on resilience has come at the expense of critical engagement with the complexities of communities. I draw on the idea of ‘collectives’ (comprising community-based organisations or less formal social networks with a shared purpose) as a lens to consider how, when unexpected life events happen, collectives can be regarded as a resource for change or constancy. The examination of collectives following a disaster can lend insight into the many elements of community as they bring people together in collaboration or drive them apart in conflict. This thesis therefore contributes to an enhanced practical and theoretical understanding of both community and resilience.

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.