西藏高原地质灾害的分布特征及成因机制

Distributional Characteristics and Causative Mechanisms of Geologic Hazards in Tibet Plateau

依据西藏独特的地理位置、地貌条件、气候条件、地质灾害类型、发生频率及危害程度,将全区划分为3个灾害分布区,即藏东高山峡谷区、藏南高原湖盆谷地区、藏北高原湖盆区。并根据各地质灾害分区的地质构造条件、气候条件、第四系松散沉积物、地形条件等,分析各区地质灾害发生原因。

Based on the unique geographical position, geomorphological conditions and climatic conditions of Tibet as well as the types, generating frequency and harmful extents of geologic hazards, it can be divided into three distribution regions of geological hazards in Tibet, namely, the East Tibet alpine and canyon region, the South Tibet plateau lake, basin and valley region and the North Tibet plateau lake basin region. The factors of engendering geologic hazards in the three regions are under discussion herein according to the geological structures, climatic conditions, unconsolidated sediment and topographical conditions of the regions.