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《Journal of Anhui Agricultural Sciences》 2011-19
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Risk Zonation of Rainstorm Disaster in Guizhou Province

CHEN Zhen-hong et al(Anshun City,Guizhou Province Meteorological Bureau,Anshun,Guizhou 561000)  
[Objective]This paper aimed to study the risk zoning of rainstorm in Guizhou based on GIS.[Method]Taking Guizhou as study area,1 km × 1 km grid data as evaluation unit,and by dint of daily precipitation in meteorological station in Guizhou from 1961 to 2008,the rainstorm risk zoning system was constructed from the aspects of disaster-stricken dangers,suffering flexibility,disaster environment sensitivity and disaster prevention or mitigation;based on the level analysis method to determine factor weight,the risk assessment model based on GIS was set up to evaluate the four sub-indicators and risks and to get the rainstorm disaster in Guizhou in the end.[Result]The risk assessment and zonation results showed a general trend that the risk level decreased from the central to all around.The low risk area distributed in the northwest of Guizhou province because of less heavy rains and high capacity of rainstorm disaster resistant,while high risk area mainly distributed in the west-central of Guizhou due to concentration rainstorms,large terrain undulation and low coverage rate of forest.Especially,according to Anshun,the high risk area took up 98.02% of the city,and the Gangwu County,where a super-large geological disaster concurred in 2010 is located at the high risk area,which showed that the risk assessment coincided with the actual situation.[Conclusion]The study provided theoretical basis for the macro disaster prevention and disaster mitigation plan.
【CateGory Index】: P426.616
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