Study On The Risk And Resilience Governance Of Mega-city Infrastructure System Linkages

Grasping the law of urban modernization,clarifying the basic needs of urban infrastructure security development,and coordinating security and development are the basic requirements for building a secure and developing city in the context of adhering to the overall national security concept and improving the national security system,which are the proper requirements for promoting the modernization of the national governance system and governance capacity.However,as the speed of social change accelerates,various risks and challenges have become important "roadblocks" to urban development and social progress in modern times,and this impact is particularly evident in mega-cities.Due to their specific characteristics,such as large population size and high density,high urban capacity,multi-functional and complex structure,high frequency and intensity of economic and social activities,high mobility,high traffic load,and networked and scaled infrastructure,mega-cities have shown great vulnerability and uncertainty in the face of risk events that have occurred in recent years.In particular,the scale of infrastructure construction in mega-cities is expanding with the increase of urbanization,the risks are also accumulating,caught in the traditional concept of urban planning and design and urban governance,urban resilience is often overlooked in the planning and construction management process,and the systemic correlation effect of existing risks also occurs under certain conditions,leaving a large number of infrastructure resilience capacity to deal with risk shocks Inadequate "sequelae",which may lead to worse risk consequences.The vulnerability of mega-city infrastructures is even more significant due to the correlation of complex networks.Under the external risk shocks that constantly present superposition,chain and compounding,the inadequate response will not only lead to cascading disasters in infrastructure-related systems,but also trigger risk spillovers,social public safety risks,environmental pollution risks,public opinion risks,etc.However,the current research on infrastructure system risk tends to study the risk of infrastructure system in a single context on the one hand,and the vulnerability of infrastructure itself on the other.Based on the current social context and the development status of mega-cities in the context of risk society in China,the research perspective should focus on how the vulnerability of infrastructure networks of complex interrelated systems can effectively enhance their resilience to risks under the increasingly complex external risk shocks.Therefore,research on the governance of infrastructure system-related risks in mega-cities is an important issue for high-quality urban development and improving government emergency response capacity in the new era.Firstly,the framework of infrastructure risk in mega-cities is formed by combining the risk events that occur in the internal system of megacities under the impact of external risks,and 20 typical cases of infrastructure-related risks in mega-cities are selected.In this process,a conceptual framework for the formation and evolution of risks associated with infrastructure systems is constructed from the perspective of government management behavior using qualitative comparative analysis(QCA),and the four main dimensions of "regulatory implementation dimension,emergency response capability dimension,subject behavior dimension,and institutional regulation dimension" are used to explore the main factors affecting the safety and operation of infrastructure in mega-cities and the group effects among them.These factors can provide a basis for infrastructure governance decisions.At the same time,based on the research results of the risk factors,the GERT dynamic network model of infrastructure system-related risks is constructed by scenario extrapolation,and a GERT network that integrates risk evolution and emergency response system construction is established to make dynamic prediction and early warning on the probability and time of various system-related risks evolution,and reveal the mechanism of infrastructure systemrelated risks evolution.Secondly,based on the above research on the factors influencing infrastructure risk governance in megacities and the correlation of dynamic evolution,the concept of resilience governance is introduced to propose a governance path to deal with systematically linked risks as well as integrated disaster risks in the new era.Based on this,an overall risk-resistance decompression interval is established to form an interval adapted to the resilient governance of urban infrastructure.At the same time,on the basis of compressing the risk formation and associated evolution of the living space of the governance body,a multi-dimensional long-term governance mechanism with "organizational resilience-social resilience-spatial resilience-technological resilience-ability resilience" is built.Finally,through the above qualitative and comparative study of infrastructurerelated risks in megacities and the path recommendations for resilience governance,a systematic theoretical guidance for the study is formed.Under the guidance of the theory,we respond to the specific challenges encountered in the practice of safety management and risk governance of urban infrastructure in China and provide policy recommendations for them.The policy framework of urban infrastructure risk management and resilience governance is comprehensively optimized from four core elements: policy legislation,policy supervision,policy needs,and policy momentum,as well as four coverage dimensions: construction of laws and regulations,Resilient regulation and law enforcement,supporting policies,and resident participation.