Abstract
Aksu Prefecture is one of the regions where hail disaster occurs frequently in Xinjiang.In this paper,elevation,underlaying surface,hail routes,hail disaster frequency,times of hail disaster,population,GDP and farmland distribution affecting hail occurrence were chosen as the estimation factors in the zonation and assessment of hail disaster in Aksu Prefecture,Xinjiang based on the data of hail disaster during the period from 1984 to 2007,days of occurring hail from the meteorological stations during the period from 1959 to 2007,DEM,land use types,etc.All the factor layers were obtained by using the analysis methods of interpolation,density,overlay,buffer,etc.of ArcGIS,and then all the factor layers were taken into account in analyzing and calculating the hail sensitivity,disaster hazard and vulnerability.Finally,the mathematic models of hail risk zonation were developed to carry out the overlaying analysis and accomplish the hail risk zonation in Aksu Prefecture.The advantages of GIS were utilized in the zonation,and the various hail risk areas were delimited more accurately compared with other previous zonations.The losses caused by hail disaster could be farthest reduced by taking the proper measures.
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