Research on the Resilience Response of Water Network Structure to Multiple Disaster Scenarios
It is of great significance to improve the resilience of infrastructure by identifying important nodes within the in-frastructure system.As an important part of the infrastructure,the water network plays an important role in the coordinated allocation of water resources and the prevention and control of drought and flood disasters.Based on the complex network theory,this paper constructs the network topology of the water network and calculates the parameters of each node of the wa-ter network with the disaster risk degree.Different node attack strategies are applied to analyze the resilience of the water network by using three types of attacks,namely random attacks,deliberate attacks and natural disasters,to obtain the over-all network efficiency and the maximum connectivity subgraph size.The results of the study of a large water network in a certain place show that when the water network structure is subjected to random attacks and natural disasters,about 80%of the nodes are destroyed,and the network toughness tends to be close to zero.In contrast,when the water network structure is deliberately attacked,about 50%of the nodes are destroyed and the water network structure system collapses.Among the deliberate attacks,PageRank attacks have a greater impact on water network resilience.In natural disaster attacks,water network structures show greater resilience in the face of heavy rainfall and flooding.Based on the research level of network topology,this paper considers the real physical state of the project to analyze and evaluate the resilience of the water net-work after random attacks,deliberate attacks and natural disasters,so as to provide a reference for the research on the con-struction and management of water network projects.