关键词: 雪崩, 乡地, 自然地理过程, 冰川, 雪崩槽, 盆地, 西藏东南部, 雪堆, 泥石流, 条冰

Abstract: During the investigations on the Guxiang mud-rock flow in Xizang from 1964 up to 1965, we also observed the distribution, damage, types, activity and forms of snow avalanche, and its roles in the physical geographic processes of high mountains.The main contents in this paper are as follows:1. The distribution and activity of snow avalanche.2. The favorable conditions for snow avalanche.3. The types of snow avalanche.4. The role of snow avalanche in the physical geographic processes of high moun-tains:(1) The geologic and geomorphologic functions of snow avalanche;(2) The function of snow avalanche in nourishment of glaciers;(3) The influence of snow avalanche on plant cover;(4) The relationship between snow avalanche and mud-rock flow.5. The influence of snow avalanche on constructional works in mountainous regions.