Abstract: Slope geological disasters in river basin not only cause damage to water conservancy projects, but also threaten people’s lives and property in surrounding areas and resettlement sites, resulting in huge social and economic losses. Interferometric Synthetic Aperture Radar (InSAR) technology is a new means for dynamic monitoring of large- scale surface deformation, which is macro, dynamic, fast, economic and et al. Considering the vegetation coverage characteristics of reservoir bank in southwest river basin, the anomalous deformation area in monitored basin has been identified by PS-InSAR and DS-InSAR technologies. A slope stability assessment model has been further established in combination with factors such as slope, aspect, vegetation and soil in the anomalous deformation area to assess the risk level of deformation area. On-the-spot investigation has been organized to review and verify the evaluation results, so as to check the hidden danger points on slope bank.

Key words: InSAR, slope in southwest river basin, land subsidence, risk level, geological disaster identification

摘要： 流域边坡的地质灾害不仅会造成水利工程破坏，更会对周边地区群众和安置点居民的生命财产安全产生严重威胁，造成巨大的社会经济损失。合成孔径雷达干涉测量（Interferometric Synthetic Aperture Radar, InSAR）技术因其宏观、动态、快速、经济等优势，为大范围地表形变动态监测提供了一种新的手段。考虑西南流域库岸植被覆盖特征，采用PS-InSAR和DS-InSAR两种InSAR技术融合获取监测流域段的异常形变区域，进一步结合异常形变区域坡度、坡向、植被和土壤等因素建立边坡稳定性评估模型，评估形变区域风险等级。组织实地勘察，对评估结果进行复核与验证，以实现边坡库岸的隐患点排查。

关键词: 合成孔径雷达干涉测量, 西南流域边坡, 地面沉降, 风险等级, 地灾识别