应急视域下山洪灾害复盘与应对过程分析:以2022年6场典型事件为例OA北大核心CSTPCD

[Objective]In recent years,global warming has led to the exacerbation of precipitation extremes,[Results]ing in se-vere threats from flash floods,which pose serious risks to human survival.The motivation of this study focuses on improving dis-aster emergency response abilities,better understanding the causes of historical events,and summing up the weaknesses,experi-ences,and lessons.[Methods]A combination of field surveys,classified statistics,and attribution analysis were used in the flash flood reflection of six disasters that occurred in Heilongjiang,Sichuan,Shanxi,and Qinghai provinces in 2022.This study reviewed the various stages of disaster evolution concerning key factors,environment,socio-economic activity,and response measures from an emergency management viewpoint.The common rules and differences of the six disaster events were systemati-cally analyzed,and the whole process of flash flooding and disaster response was compared and replayed.Meanwhile,in view of the shortcomings exposed in the early warning,response coupling,and suggestions have been proposed.[Results]The result demonstrated that five disasters were caused by short-duration extremes,and all of them occurred in the areas of precipitation at night,which increased the risk of flash floods and the difficulty of rescue.Three disasters occurred in the mountains and valleys of western China,which are key prevention areas for flash flood disaster.In four cases,flash floods were exacerbated by human activities extending into areas with inefficient risk detection and early warning.[Conclusion]The six typical disasters of flash floods in 2022 have the similarity of heavy rainfall intensity,short duration,high flood peak,and severe losses.Although a series of measures have been taken at the national level and great effects have been achieved,there are still challenges in the future process of disaster prevention for flash floods.It is suggested to adhere to the prevention first strategy of flash flood control,ex-plore monitoring and early warning research on personnel transfer and evacuation,learn the lessons from event reflection,and constantly improve the comprehensive ability of the primary level to deal with flood disasters in China.