地质科技通报2025，Vol.44Issue(4)：62-77,16.DOI:10.19509/j.cnki.dzkq.tb20240351
白鹤滩库区活动滑坡识别及形变影响因素分析
Identification of active landslides and analysis of deformation influencing factors in the Baihetan Reservoir area
摘要
Abstract
[Objective]Landslides in reservoir areas represent one of the most prevalent geological hazards in hydropower engineering construction.Landslides in reservoir area,they can generate surge waves,obstruct river channels,and even trigger dam breaches,resulting in significant economic losses and casualties.Therefore,understanding the deformation behavior of reservoir landslides is critical for early identification and monitoring.[Methods]This study employs Stacking Interferometry Synthetic Aperture Radar(Stacking-InSAR)and Small Baseline Subset Interferometry Synthetic Aperture Radar(SBAS-InSAR)techniques with Sentinel-1 data to identify active landslides and analyze deformation patterns in the Baihetan Reservoir area before and after impoundment.In addition,Sentinel-2 imagery and the Automated Water Extraction Index(AWEI)were used to derive reservoir water level variations.Representative landslides exhibiting substantial deformation were selected—one each from asceding-track,descending-track,and pre-impoundment datasets—to analyze the influence of water level fluctuations and rainfall on deformation behavior.[Results and Conclusion]The results demonstrate that the AWEI-based water level extraction method using Sentinel-2 imagery achieved robust performance in the study area.The extracted water levels exhibited a mean error of 0.89 m compared to measured values,confirming the method's reliability for data-scarce regions.A total of 103 active landslides were identified in the Baihetan Reservoir area during the monitoring period through analysis of both ascending and descending orbit images.A total of 103 active landslides were detected in the Baihetan reservoir area during the obervation period,37 exhibited submergence of their front edges,while 23 demonstrated clear deformation responses to water level fluctuations.Reservoir bank landslides showed significantly stronger correlation with water level changes than with rainfall.Notably,drawdown conditions exerted particularly pronounced effects on bank stability,with deformation rates increasing during lowering phases compared to rising water levels.关键词
白鹤滩库区/InSAR/活动滑坡/识别/自动水体提取指数/水位波动Key words
Baihetan Reservoir area/InSAR/active landslide/identification/automated water extraction index/water level fluctuation分类
天文与地球科学引用本文复制引用
韦春豪,李为乐,吴章雷,周胜森,王新程,李雪清,李雨森..白鹤滩库区活动滑坡识别及形变影响因素分析[J].地质科技通报,2025,44(4):62-77,16.基金项目
国家重点研发计划(2021YFC3000401) （2021YFC3000401）
四川省重点研发项目(2023YFS0435) （2023YFS0435）
地质灾害防治与地质环境保护国家重点实验室自主研究课题(SKLGP2022Z007) （SKLGP2022Z007）
自然资源部-四川省合作项目(SCDZRS-2023) （SCDZRS-2023）
