西藏夹中4#泥石流高寒高海拔特性的初步研究

以西藏夹中4#号泥石流为例，通过对该泥石流的形成条件、性质类型、运动规律及防治措施的特性等方面的研究，认为其高海高海拔条件与泥石流形成、发展和防治有着密切的关系，气候干旱寒冷、日照强、风速快，植被稀少，昼夜温差大导致岩石物理风化作用强烈，岩石沿节理、层理、片理崩解成碎片状、颗粒状，堆积在斜坡上，形成泥石流固体物质的来源，陡峭的地形和强暴雨为其创造运动场所和动力条件，防治措施以小型拦挡或排导工程为主，生态防护工程作用不大等特点，可供西藏公路沿线的泥石流整治参考。

Preliminary study of Jiazhong 4# debris flows in Tibet

By studying the Jiazhong 4# debris flows, the paper discusses the properties of debris flows under the condition of high altitudes and cold. In conclusion, there is close relation between two aspects, one aspect being the condition of high attitudes and high cold, the other aspect being the formation and development of the Jiazhong 4# debris flows and the method to prevent and cure. In the area, it is cold and droughty, strong sunlight, fast wind speed, sparse natural vegetation, big difference in temperature, all leading to stronger physical weathering. It is easier to produce a great deal of solid matter. The steep topography and plenty of rainfall are respectively the dynamic and inductive factors. The main measure to prevent and cure the debris flows is to build small barrage or bridge, but the effect of ecological defending is not marked. The paper can be helpful for the building of highroad in Tibet.