【摘要】 大渡河流域地质环境复杂，滑坡灾害受地形陡峭、地层松散、构造活跃与极端降雨多因素耦合控制，呈现显著区域分异特征。基于SBAS-InSAR技术与多源数据融合分析，揭示流域内2 377处滑坡中66.18%为小型滑坡，集中分布于汉源、丹巴等陡坡区域。成功识别17处活动性滑坡，依据变形机制划分为四类：蓄水加剧型堆积体滑坡、蓄水诱发型堆积体滑坡、蓄水诱发型顺层岩质滑坡、蓄水诱发型倾倒变形滑坡。典型案例研究表明，库水位骤升通过坡脚侵蚀-渗流场改变-岩体软化三重效应诱发滑坡复活，时序形变揭示水位波动与降雨的协同致灾机制。建议通过动态监测体系构建、水位调度优化及工程生态协同治理防控风险，研究成果为库区滑坡风险管理提供理论支撑。更多还原

【Abstract】 The Dadu River Basin features a complex geological environment where landslide hazards are jointly controlled by multiple factors, including steep terrain, loose strata, active tectonics, and extreme rainfall, exhibiting significant regional differentiation. Based on SBAS-InSAR technology and multi-source data fusion analysis, it was found that 66.18% of the 2 377 identified landslides are small-scale, predominantly distributed in steep-slope areas such as Hanyuan and Danba. Seventeen active landslides were successfully identified and categorized into four types according to their deformation mechanisms: reservoir-aggravated accumulation landslides, reservoir-induced accumulation landslides, reservoir-induced bedding rock landslides, and reservoir-induced toppling deformation landslides. Case studies indicate that a rapid rise in reservoir water level can reactivate landslides through a triple mechanism of toe erosion, seepage field alteration, and rock mass softening. Time-series deformation analysis reveals a synergistic disaster-inducing mechanism between water-level fluctuations and rainfall. It is recommended to mitigate risks through the establishment of a dynamic monitoring system, optimization of reservoir water-level regulation, and implementation of integrated engineering-ecological control measures. The results provide theoretical support for landslide risk management in reservoir areas.更多还原