Assessment of Seismic Resilience in Urban Water Distribution Network Considering Hydraulic Indices

Seismic resilience of Sadra City water distribution network (WDN) is assessed. Complex networks theory is applied to model the WDN. Two hydraulic resilience indices including the population impacted (PI) and the water services availability (WSA) are employed. Nine scenarios considering the different earthquake intensities and epicenters are considered. The robust repair strategy is proposed considering two different perspectives, the maximum PI and WDN recovery time. Based on hydraulic resilience indices, north of Sadra City is the most vulnerable area and the network resilience is the highest in the south. Finally, employing fragility curve analysis, pipes with high probability of damage are detected to be enhanced to increase WDN resilience upon future disasters. The perspective of the WDN capacity to return to normal condition after the shock to the system is studied based on the concept of recovery time. The recovery time of the system in each scenario depicted significant correlation with the hydraulic indices.