Author(s): Roza Ranjbar, Ardalan Izadi, Farhad Yazdandoost
Linked Author(s): Ardalan Izadi
Keywords: Water Distribution Network (WDN), asset-based, resilient risk management, water outage time, regret cost
Abstract: Water Distribution Networks (WDNs), as one of the most vital infrastructures in cities, have been associated with many disruptive events, such as pipe breaks, damages, pipe leakages, inaccessibility and pressure deficits. Failure consequences in these networks may cause chaos in cities and expose citizens to significant risks. Resilient risk management is adopted here as a novel approach in minimizing the consequences of these events. Despite conventional assessment of resiliency in WDN, which are usually system-based, this study aims at introducing a new perspective for measuring resiliency of WDN, entitled Asset-Based. In this study, five new indices have been presented to cover insufficiency of the previous indices proposed for resiliency measurement of risks in a WDN. Herein, Graduality, Recovery Rate, Water Outage Time, Hydraulic Critical Index (HCI) and Regret Cost are the new identified resilient indexes measuring resiliency of each pipe asset due to the failure risk. The EPANET software linked to a designed MATLAB suit code, are employed here to assess proposed indices for a real case study suffering from high rate of pipe failure. The results show that the new indices can truly assess the asset's role in system resiliency. Thus, the consequences of failures and the priority of assets for facing with the disruptions can be better determined. Furthermore, the Water Outage Time and Regret Cost indices have more importance as they are related to the social and financial issue, respectively
Year: 2017