西藏然乌湖口高位地质灾害变形特征分析

青藏高原持续隆升使得其周缘地带地质灾害频发，复杂的地质背景，造就了帕隆藏布流域链式灾害发育、堵江致灾风险高的特点。近年来，地处帕隆藏布流域的然乌湖口地质灾害变形强烈，本文通过光学遥感与InSAR监测技术，对然乌湖口82道班沟内进行风险物源识别，解译出研究区共存在高位冰崩、崩塌、冰碛物、崩滑体4种风险物源类型，针对各风险物源的遥感解译数据进行特征分析，综合然乌湖流域内的地质背景，阐述风险物源的致灾因素及成灾模式。结合InSAR监测结果，将然乌湖口右岸斜坡体及上部解译风险物源区划分为82道班、迫隆与哑隆三个高风险区，并依据变形监测结果进行形变特征分析。

Analysis on deformation characteristics of geological hazards in Ranwu Lake Estuary

The continuous uplift of the Qinghai Tibet Plateau has led to frequent geological disasters in its surrounding areas. The complex geological background has created the characteristics of chain disaster development and high risk of river blocking in the Palongzangbu basin. In recent years, Ranwu Lake estuary, located in the Palongzangbu basin, has experienced severe geological deformation. In this paper, the risk material sources identification in 82 road class at Ranwu Lake are carried out by optical remote sensing and InSAR monitoring technology. It can be found that there are four risk source types in the study area: high-level ice debris, collapse, moraine and avalanche. Characteristics analysis and disaster risk assessment are carried out for each risk source, and based on the geological background of Ranwu Lake, this paper expounds the disaster causing factors and modes of risk material sources. Combined with the InSAR monitoring results. The slope body and its upper interpretation risk material sources areas on the right bank of Ranwu Lake estuary are divided into three high risk areas: 82 road class, Polong and Yalong, and the deformation characteristics are analyzed.