城市暴雨洪涝灾害动力学机制及其防控关键技术OA

The intensification of extreme precipitation due to climate change coupled with the hydrological effects of urbanization,has exacerbated urban flood disasters,making them more frequent,severe,and widespread.To address the technical demands for urban flood prevention and control under the coupled natural-social-engineering context,this paper systematically reviews the primary challenges currently faced in urban flood disaster manage-ment,elucidates the dynamic mechanisms of urban flood disasters,and proposes key technologies for disaster preven-tion and control.The findings reveal that the key challenges in urban flood disaster management encompass:(1)increased uncertainty in urban flood risk;(2)insufficient understanding of the coupled natural-social mechanisms in urban flood risk governance;(3)ambiguous or absent regulatory standards for protecting and managing hazard-affected populations and infrastructures;and(4)a lack of precise technologies for disrupting disaster chains.The dynamic mechanisms of urban flood disasters arise from the interactions and mappings among urban flood hydrody-namics,the instability and failure of hazard-affected bodies,social system responses,and the cascade transmission of disaster chains.From the perspectives of engineering technology and policy management,key technologies for disaster prevention and control are proposed,covering aspects such as storm warning and flood simulation,intelli-gent identification of instability of hazard-affected bodies,intelligent interruption of disaster chains,and enhance-ment of disaster resilience,along with appropriate strategies,approaches,and measures.This study clarifies the syn-ergistic mechanisms of the coupled"natural-social-engineering"system in urban flood disasters.The findings offer theoretical and technical support for urban flood disaster prevention and control.