Review and Analysis of"Doksuri"Typhoon Rainstorm Flooding and Study on Drainage and Flood Prevention Enhancement Strategies——Taking Fuzhou Urban Area as an Example
In the context of global climate change,extreme rainfall events have become increasingly frequent.The heavy rainfall during Ty-phoon"Doksuri"triggered severe waterlogging disasters in Fujian,Zhejiang,Anhui,Jiangxi,and Guangdong provinces.Taking the urban ar-ea of Fuzhou as an example,this paper reviews and analyzes the rainstorm-induced waterlogging disaster during Typhoon"Doksuri"and formulates strategies to improve drainage and waterlogging prevention,aiming to provide references for other cities.The research findings in-dicate that during Typhoon"Doksuri,"the maximum 24-hour,12-hour,and 6-hour rainfall volumes all exceeded the corresponding rainfall levels for a once-in-a-century recurrence interval,with a highly concentrated temporal and spatial distribution of precipitation.The causes of waterlogging in Fuzhou's urban area include rainfall exceeding design standards,inadequate drainage and waterlogging preven-tion facilities,and aggravated waterlogging due to mountain torrents entering the city.It is recommended to further improve the urban drain-age and waterlogging prevention infrastructure system,optimize the joint dispatching plan for water-related facilities,and develop a resilient disaster prevention and mitigation system to ensure urban water security.
Heavy rainfall associated with typhoonsExtreme rainfallFlooding disasterDrainage and flood prevention
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