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| Analysis of distribution character and background of geological hazards in western Qinghai-Tibet Plateau |
| LIU GANG, YAN Yunpeng, LIU Jianyu |
| China Aero Geophysical Survey and Remote Sensing Center for Land and Resources, Beijing 100083, China |
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Abstract The rapid uplift of the Qinghai-Tibet Plateau cause drastic changes in geology, and form and climate, then the geological hazards such as dilapidation,landslide,mudflow,debris flow and dam breaking of glacier lakes happen frequently. The distribution and forming conditions of geological hazards in western Qinghai-Tibet Plateau were studied by remote sensing, and the hazards evolution background was researched. The dilapidation,landslide and mudflow mainly develop in the canyons of Himalayas mountains,Kailas Range mountains,Qaraqurum mountains and Kunlun mountains. The glacier lakes are usually distributed around the snow line. The debris flow is distributed in steep slope areas under the snow line where the rocks are exposed. Thaw-freezes solifluction is distributed in the area between permafrost and seasonal frozen ground where the altitude is lower than that of the debris flow. The orogenic belt in plateau provide landform conditions, the glaciers and precipitation provide water source, and the glacial action and frequent thaw-freeze action provide a mass of materials for the geologic hazards. The rapid uplift of the Qinghai-Tibet Plateau is the intrinsic factor of the geological hazards, and the high-altitude and extremely cold climate are the extrinsic factors.
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Received: 10 March 2017
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2017, Vol. 4 
