Reanalysis of the characteristics of extreme rainstorm and flood disaster in urban areas and coping countermeasures
With the effects of global warming and rapid urbanization,the risk of extreme rainstorm and flood disas-ter in urban areas is increasing.Through literature research,scientific analysis and social practice,firstly,the main characteristics of urban heavy rainstorm and flood disasters under the influence of extreme weather events are summarized:large rainfall intensity and accumulated rainfall,stronger suddenness,extremely difficult forecasting,obvious spatiotemporal dynamics,coupled and interactive flood disasters,wide distribution range,frequent mass occurrence,induced secondary disasters,obvious cascade effect,good at drilling holes,finding flood control loopholes,and more destructive and influential disasters.Then,from the aspects of multi-scale natural environ-ment,flood control and drainage capacity building,flood mitigation technology and equipment,flood emergency organization and management,and flood prevention policies and regulations,the main causes of urban extreme rainstorm and flood disasters are revealed,and scientific coping strategies for urban heavy rainstorm and flood dis-asters in extreme weather events are proposed,namely:deepening the theory of urban rainstorm and flood disasters cascade effect,developing urban extreme rainstorm and flood prediction and refined calculation models,improving urban rainstorm and flood emergency defense technology and equipment,and promoting the overall coordinated dis-aster prevention of urban flood control and drainage system.The research results will help to cope with the new challenges faced by urban flood disasters under the influence of climate change and extreme weather,further im-prove the theory and technology of urban flood disaster prevention and risk management system,and have important guiding significance for the scientific prevention and control of urban extreme rainstorm flood disasters.
万方数据
维普
