Research On The Correlation Degree Of Waterlogging Disaster Resilience In Urban Road Traffic System

In recent years,the frequent occurrence of waterlogging disasters have posed a great threat to the operation of urban infrastructure,especially the urban road traffic system.On the focus topic of ensuring water security,general secretary Xi Jinping pointed out that building a"sponge city" that complies with nature and alleviated the occurrence of waterlogging disasters.In October 2017,general secretary Xi Jinping proposed in his report to the 19th Communist Party of China National Congress that we should accelerate the reform of ecological civilization system,build a beautiful China.Upholding harmonious coexistence between human and nature is one of the basic strategies for upholding and developing socialism with Chinese characteristics in the new era.In the field of disaster prevention and mitigation,the concept of resilience has been applied and developed,which provides us with new ideas and directions to solve the threat of waterlogging in urban road traffic system.Studying the resilience of waterlogging in urban road traffic system is an important way to improve the capacity of road traffic system to cope with waterlogging and a beneficial attempt to build a"sponge city" and to realize "upholding harmonious coexistence between human and nature".This paper takes the urban road traffic system as the research object,explores the development trend of the urban road traffic system resilience research at home and abroad,studys the waterlogging disaster resilience in urban road traffic system.Firstly,the statistical characteristics of the road traffic network are analyzed,and the node degree,average shortest path length and clustering coefficient are used to characterize the network.Then,according to the four basic characteristics of urban critical infrastructure system resilience proposed by Bruneau,the research object is targeted at urban road traffic system.Based on the waterlogging disaster scenario,the four characteristics of redundancy,robustness,resources and rapidity are used to construct the measurement model of urban road traffic system resilience.The model will establish the objective planning function from four aspects of redundancy,resource,robustness and rapidity respectively.Based on the evolutionary algorithm and cascaded failure model,the robustness will be dynamically evolved,and then the rapidity index of the road traffic system will be obtaine.Secondly,based on Pimm's viewpoint of the resilience of the effectiveness of system function,the effectiveness analysis of the network structure of the network system is carried out in combination with the seepage theory.On this basis,the missing key connections are identified as the "weak area" of the waterlogging resilience of the urban road transportation network system.Based on the identified "weak area" of waterlogging disaster resilience in road traffic system,the logistic regression model is used to study the correlation degree of waterlogging disaster resilience in urban road traffic system.Finally,take Wuhan road traffic system as an example to carry on the empirical research.The rationality and applicability of the quantitative model of waterlogging disaster resilience in road traffic system,the identification model of "weak area" of waterlogging disaster resilience in road traffic system and the model of waterlogging disaster resilience correlation degree in road traffic system are verified,which can provide new methods and decision-making ideas for improving waterlogging disaster resilience in urban road traffic system.