关键词: 山地灾害, 垂直气候特征, 降水垂直分布, 青藏高原东南缘

Abstract: Mountain hazards such as debris flows are frequent in the southeastern margin of Qinghai-Tibet Plateau, but the area is lack of accurate precipitation data. In order to evaluate the rainfall in the data-lack area, we divide the study area into 6 regions according to its hydrographic watershed and provide a precipitation vertical distribution formula based on statistic data including average annual precipitation, altitude, slope aspect, gradient, etc. from 60 meteorological stations in the 6 regions between 1981 and 2010. It is founded that the annual rainfall is well related to the altitude, slope aspect and gradient.The formula is then verified with the data in Lawagou Watershed in the Jinsha River Bain and Jiangzuigou Watershed in the Dadu River Basin. The results show that the formula can obtain a clear vertical distribution of rainfall for the area lack of meteorological stations and is generally applicable to calculating precipitation in the southeastern margin of Qinghai-Tibet Plateau, which can provide references for the warning and prevention of the mountainous hazards.

Key words: mountain hazard, vertical climate characteristics, precipitation vertical distribution, southeastern margin of Qinghai-Tibet Plateau