Journal Articles

Permanent URI for this collectionhttps://mro.massey.ac.nz/handle/10179/7915

Browse

Author: search.filters.author.Stewart CSubject: search.filters.subject.Resilience

Search Results

Now showing 1 - 3 of 3
  • Thumbnail Image
    Item
    A new volcanic multi-hazard impact model for water supply systems: Application at Taranaki Mounga, Aotearoa New Zealand
    (Elsevier B.V., 2024-12-24) Porter H; Wilson TM; Weir A; Stewart C; Craig HM; Wild AJ; Paulik R; Fairclough R; Buzzella M
    Water supply systems provide an essential service for society and are highly vulnerable to damage and disruption during volcanic eruptions. Impacts sustained by water supply systems during volcanic eruptions have resulted in prolonged and repeated supply outages. Previous approaches to assessing volcanic impacts to water supply systems have been relatively simplistic, based on hazard intensity thresholds, and only considering direct damage. There is a need for water supply risk assessment approaches informed by vulnerability models that consider the pivotal role of system design and indirect impacts; such as supply and demand fluctuations, personnel shortages, and disruptions to interdependent infrastructure networks. We present a whole-of-system volcanic vulnerability model and impact assessment framework for water supply systems that can be used to estimate system-wide impacts during future volcanic eruptions. This model is developed in collaboration with volcanic risk researchers and water supply engineers in Aotearoa New Zealand and applied to a case study in the Taranaki region for a long-duration and multi-hazard eruption scenario from the active stratovolcano Taranaki Mounga. The model provides an assessment of the functionality of water supply systems affected directly and indirectly by the scenario eruption, interdependent critical infrastructure services, and associated emergency management actions (e.g., evacuations). This scenario, and its modelled impacts, allows practitioners to explore potential mitigation and emergency response options. This framework can be applied in other volcanic contexts to assess impacts on water supplies from future eruptions, highlight key systemic vulnerabilities, and provide a basis for the prioritisation and implementation of risk management strategies.
  • Thumbnail Image
    Item
    Creating a ‘planning emergency levels of service’ framework – a silver bullet, or something useful for target practice?
    (Elsevier B.V., 2023-06-01) Mowll R; Becker J; Wotherspoon L; Stewart C; Johnston D; Neely D
    ‘Planning Emergency Levels of Service’ (PELOS) are service delivery goals for infrastructure providers during and after an emergency event. These goals could be delivered through the existing infrastructure (e.g., pipes, lines, cables), or through other means (trucked water or the provision of generators). This paper describes how an operationalised framework of PELOS for the Wellington region, New Zealand was created, alongside the key stakeholders. We undertook interviews and workshops with critical infrastructure entities to create the framework. Through this process we found five themes that informed the context and development of the PELOS framework: interdependencies between critical infrastructure, the need to consider the vulnerabilities of some community members, emergency planning considerations, stakeholders’ willingness to collaborate on this research/project and the flexibility/adaptability of the delivery of infrastructure services following a major event. These themes are all explored in this paper. This research finds that the understanding of the hazardscape and potential outages from hazards is critical and that co-ordination between key stakeholders is essential to create such a framework. This paper may be used to inform the production of PELOS frameworks in other localities.
  • Thumbnail Image
    Item
    Infrastructure planning emergency levels of service for the Wellington region, Aotearoa New Zealand – A preliminary framework
    (Elsevier Ltd, 2022-04-01) Mowll R; Becker JS; Wotherspoon L; Stewart C; Johnston D; Neeley D; Rovins J; Ripley S
    Elements of a potential emergency response to a major hazard event can be identified early in the response planning process. Having goals for emergency provision of services, particularly infrastructure, would provide clear planning goals and actions for emergency responders. Agreed goals would also help residents more fully understand the likely nature of the service provisions following a major hazard event, allowing them to plan for events and resulting infrastructure outages. This paper proposes a set of ‘planning emergency levels of service’ based in literature and developed by practitioners that could be used to understand post-event planning and actions, across the critical infrastructure sectors. The resulting framework contains proposed planning emergency levels of service for the energy, telecommunications, transport, and water sectors. With potential local adjustment, this framework may be more widely applicable for other high-income regions. Limitations of the framework include that it has been developed based on literature and emergency management professionals' opinions and requires more research to ascertain its operational applicability.