近隆藏布流域是川藏公路（西藏境内）泥石流最活跃、类型最齐全、危害最严重的地区。根据以往资料、遥感普查以及现场考察，确定流域内公路两侧分布有灾害性泥石流沟104条，其中沟谷型泥石流沟87条。泥石流沟沟口高程在2500-3500m之间，流域面积介于0.8-185km^2之间，其中83.7%的流域面积在1.0-40.0km^2之间。按成因，泥石流可分为冰川型、溃决型、降雨型泥石流，其变化特性与泥石流流域的高程、降雨变化和地震活动密切相关。最后讨论了泥石流活动对地方经济发展的危害以及对当地山地环境的影响。

Polongzangbu Basin，located in southeastern Tibet，is known by the world for its debris flow hazards， especially the debris flow ，taking place in Zamulongba gully OO 9th April，2000，which blocked Yigong Lake 62 days and the following breaking flood cursed severely loNses．Presently，the deb6s flow activities OCcur frequently．
Based on the historical data，remote sensing conveying and fidd investigation．authors have determined that there are 104 debris flow gu llies in Polongzangbu Basin．87 of which have clear channe1．The debris flow gullies loc ate the altitude between 2 500m an d 4 000m ，andtheir basin areas are between 0．8 km and 185 km ，especialy 80
pe rcent ofwhich are between1．0 km0and 30 km ．Accordingtothe cause offormation．debrisflow gullies inthis area could be divided into 3 types：glacial，glacial lake burst and rainfal debris flow．At last，this paper discusses the impact of debris flow on the lccat economic development and environment．