西藏易贡大滑坡成因探讨

2000年4月9日, 西藏林芝地区波密县易贡藏布札木弄沟发生了体积超过3×108 m3的特大规模滑坡, 这是该沟100年(1900—2000年)来发生的第2次大规模滑坡.在卫星遥感影像分析基础上, 结合地质、气象、地震等资料, 对札木弄沟100年内2次发生特大规模滑坡的原因进行了分析, 表明这2次滑坡是地质构造、地层岩性、新构造运动、水文和气象因素共同作用的结果.分析结果还显示, 札木弄沟已进入下一个物质与能量积累过程, 在适当的外部条件作用下, 有可能再次发生滑坡. 

Discussion on the Occurrence of Yigong Landslide in Tibet

In April 9, 2000, the huge landslide occurred in Yigong River in pomi in Tibet, the volume of the landslide was over 3×108 m3. It was the second landslide occurred in the same gully during the last 100 years. Based on the analysis of satellite remote sensing images and data of stratum, structure, earthquakes and meteorology, the reasons for the occurrence of landslides were discussed. It has been shown that occurrence of the landslide were controlled by the combination of geological structure, stratum character, neo-tectonism and meteorological conditions. The gully is now in the condition of material and energy accumulation, landslide will probably occur in future.