Zoning of geological disasters of Hualong county in Qinghai province

Based on the detailed investigation of geological disasters of Hualong County in 2008 by authors,the types,scales,harmful degree and the spatial and temporal distribution of geological disasters within the county had already been identified,and the geological disaster-prone and risk assessment zoning were also been classified.1) There are 438 geological disaster points of the whole country,and the numbers of landslide are 243,the unstable slopes are 92,the debris flows are 90 and the collapses are 13,which are mainly controlled by topography and climatic conditions of the Tibet Plateau.2) The geological disasters high-prone areas are accounted for 49.1% of the total area of the county;and the middle-prone areas are accounted for 33.5%;the low-prone areas are accounted for 17.4%.3) The high risk-assessment areas of geological disasters are accounted for 44.3%;the dangerous areas are accounted for 37.4%;and low-risk areas are accounted for 18.3%.The results of this investigation will give some advises to prevent the geological disasters for the local government.