Assessment model on risk degree of snow disaster and its risk division in Qinghai Plateau

Based on the theories and methods of natural disaster risk assessment, assessment ｍodel on risk degree of snow disaster for Qinghai Province was established in this study. The meteorological, economic and livestocks factors relating to the snow disaster were selected and their distribution maps were mapped by ArcGIS spatial analysis function, and then using geographic statistical functions of ArcGIS made the snowstorm risk zoning map of Qinghai Province. Present study showed that high risk areas of the snowstorm were mainly distributed in the south region of Qinghai Province, in which Gande, Jiuzhi, Chengduo, Dari and some regions of Yushu and Zeku County were the highest; the low risk areas of snowstorm were mainly distributed in Qaidam Basin and the eastern agricultural areas, in which Mangya, Xunhua, Ledu, Pingan, Jianza were the lowest; the others were in the different partition regions of risk from high to low level.