藏东南地区直白沟冰雪型地质灾害链时空演化特征

作者：Hai Huang, Cheng Gong · 发表于：Earth Science-Journal of China University of Geosciences · 年份：2024 · DOI：10.3799/dqkx.2023.140 · 被引用次数：5 · 研究领域：Cryospheric studies and observations、Landslides and related hazards、Climate change and permafrost

The glacier and snow-related geohazard chain pose a significant threat to the economic activities in the Southeast Tibetan Plateau.Analyzing the evolution law of disaster can provide support for the risk prevention and mitigation, and also for the early identification of disaster.Based on field survey, remote sensing interpretation, and hazard monitoring, in this paper it aims to analyze the evolution of disaster formation conditions and the activity characteristics of six geohazard chain events since the 1950.The results show that the geohazard chain in Zhibai Gully was driven by glacier activity and rock collapse.The evolution models of geohazard chain are summarized into two types: physical property change chain induced by ice water phase transformation, and geological cascade chain induced by coupling of multi factors.It is found that the disaster activity is significantly controlled by the earthquake, and the disaster characteristics is correlated with the temporal-spatial evolution of the formation conditions.Under the influence of the earthquake and deglacialtion, the initiation of disaster chain is transformed from glacier active to rock collapse.The 基金项目： 中国地质调查局地质调查项目(No.DD20221741); 第二次青藏高原综合科学考察研究项目(No. 2019QZKK0902).