As critical components of urban infrastructure

water and power supply networks play important roles by supplying water and power for living and production to maintain daily operation in urban areas. In previous earthquakes

seismic damage to these facilities has severe impact on urban emergency rescue

firefighting

and health care. Therefore

it is of great significance to ensure the seismic resilience of water and power supply networks. A new methodology based on network flow theory was proposed for the seismic resilience analysis of water and power supply networks with highly functional interdependent characteristics. First

the optimal objective function of the collaborative recovery of water and power supply networks was established

and the constraint conditions of the post-earthquake functional recovery of water and power supply networks were presented according to the network flow method. On the basis of the Gurobi solver

the coupled model was solved by the mixed integer programming method. The proposed method could effectively evaluate the seismic performance of different parts of each network. Moreover

the repair tasks could be reasonably distributed according to the existing repair resources to realize the optimal recovery of the interdependent networks. Results show that due to the uncertainties of physical damage of the components of water and power supply networks

the recovery process of water and power supply networks exhibited significant discreteness

and the discreteness changed over time. On average

the recovery speed of power grids was faster than that of water supply networks.