摘要
Abstract
Flash flood disasters are among the most destructive natural hazards,and understanding their influencing factors is fundamental to scientific disaster prevention and mitigation.Currently,there are relatively few researches on the impact of tropical cyclones and reservoirs on flash flood disasters.However,in island regions where flash floods frequently occur under the combined effect of multiple factors,the impact of these two factors cannot be ignored.Based on the"pressure-state-response"framework and employing the geodetector method,this study quantitatively analyzes the influencing factors on the distribution of flash flood disasters in Hainan Island,China,from 1970 to 2010,which has revealed the evolution process of each factor.Extreme precipitation and tropical cyclones are the dominant factors influencing the spatial distribution of flash flood disasters in Hainan Island,with the driving force of tropical cyclones averaging 1.1 times that of extreme precipitation.Medium-sized reservoirs exhibit the most significant mitigation effect,followed by large and small reservoirs.Therefore,in the forecasting,early warning and risk management of flash flood disasters in island regions,greater attention should be paid to the impacts of extreme precipitation and tropical cyclones,and the regulatory role of medium-sized reservoirs should be fully leveraged.关键词
山洪灾害/热带气旋/水库/海岛Key words
flash floods/tropical cyclones/reservoir/island分类
建筑与水利
