The aim of this project is to integrate seismic resilience measures into business-as-usual asset management practices of 3 Waters service delivery. The final outcome of the project will be tools to allow the seismic risk to 3 Waters infrastructure to be realistically priced for the purpose of:
- Long-term plans
- Capital investment
- Maintenance decisions
In 2014, the total replacement value of the 3 waters assets in New Zealand was estimated about NZ$45.2 billion. The wastewater network had the highest replacement value at around NZ$16,2 billions and storm water at NZ$11.2 billion. As these assets are upgraded or replaced, many difficult decisions will need to be made in respect to the trade-offs between Levels of Service, capital costs, operation costs and management of risk. One key lesson from the Canterbury Earthquakes is that insurance cannot be relied upon as a sole risk mitigation strategy.
It is important that the argument for, and the cost of, seismic resilience is adequately understood, so that balanced judgments can be made in the investment and management of the 3 waters assets from a whole-of-life perspective. This project aims to provide technical and decision support tools to assist in this process.
There are several stages to the project.
- Definitions of Levels of Service (LoS) - completed
- Creation of Spatial Seismic Loss Assessment Tool
- Integration of fragility curves (from Opus Research's NHRP project and others for potable and wastewater)
- Piloting in a city/region
- Tool available to QC partners
Level of Service Performance Measure for the Seismic Resilience of 3 Waters Network Delivery
This first stage is complete. The Levels of Service Performance Measures for the Seismic Resilience of 3 Waters Network Delivery guidelines define the Levels of Service across all aspects of the 3 Waters system that may be expected as the recovery progresses from an emergency. It also provides a template to assist in the development of community specific Levels of Service and describes the iterative process that needs to be undertaken to allow consultation with the community