Resilience Assessment Guideline For Three Waters: A Technical Resilience Prospective

Annual Conference

A guideline for assessing resilience of three waters systems (water supply, wastewater, stormwater) is developed in the New Zealand context, with a focus on asset technical resilience. The guideline takes into account of criticality of three waters assets, potential hazards, asset vulnerability and network consequence. Sponsored by the University of Canterbury Quake Centre, the guideline promotes wider understanding of network asset technical resilience and provides a framework for a consistent assessment approach, to support local governments and private sector.

It is intended that the guideline can be used as both a pre-event proactive tool and a post-event reactive tool. The guideline provides tools and strategies to assist asset owners to make rational and strategic decisions for asset management and urban planning of three waters systems. This guideline will fit into a wider framework of guidance being developed to set national good practice in three waters asset management with particular emphasis on pipe renewals.

To improve network resilience, it is important to identify critical assets that have significant influence on the level of service for a community if impaired. The guideline assists asset managers to spatially identify asset criticality within the network, asset vulnerability, and relative risk of service disruption to the community. One of the outputs of resilience assessment is a resilience prioritisation ranking of assets across the network. This can be used to allocate resources (e.g., budget, crew) on targeted asset renewals and to reduce the consequences of natural hazards on loss of the level of service.

This paper presents two tiers of assessment sophistication namely: a simplified (qualitative and semi-quantitative) and an advanced approach (quantitative modelling). This aims to provide asset managers with flexibility to undertake assessment to a level matched to the scale of the network, urban development and resources available. Opportunities for integration of technical resilience modelling into long-term improvement of network resilience as well as hazard response and planning are discussed.

Conference Papers

RESILIENCE ASSESSMENT GUIDELINE FOR THREE WATERS - A TECHNICAL RESILIENCE PROSPECTIVE.pdf

pdf
462 KB
27 Sep 2018

Thursday Arena Lounge 12.00pm.pdf

pdf
1 MB
01 Oct 2018