基于SBAS-InSAR技术的HD库区CYP滑坡形变监测分析  

Analysis of Deformation Monitoring of CYP Landslide in HD Reservoir Area Based on SBAS-InSAR Technology

作　　者：蒲磊 杨启贵 程翔[1,4] 周伟 PU Lei;YANG Qi-gui;CHENG Xiang;ZHOU Wei(Institute of Water Engineering Sciences,Wuhan University,Wuhan 430072,Hubei Province,China;State Key Laboratory of Water Resources Engineering and Management,Wuhan University,Wuhan 430072,Hubei Province,China;Changjiang Institute of Survey,Planning,Design and Research,Wuhan 430010,Hubei Province,China;China Antarctic Surveying and Mapping Research Center,Wuhan University,Wuhan 430072,Hubei Province,China)

机构地区：[1]武汉大学水工程科学研究院,湖北武汉430072 [2]武汉大学水资源工程与调度全国重点实验室,湖北武汉430072 [3]长江设计集团有限公司,湖北武汉430010 [4]武汉大学中国南极测绘研究中心,湖北武汉430072

出　　处：《中国农村水利水电》2024年第11期240-246,共7页China Rural Water and Hydropower

基　　金：云南省重大科技专项计划(202202AF08004);华能澜沧江科技项目(HY2021/D11)。

摘　　要：澜沧江流域HD水库地处云南省西北部、横断山脉区域,水库区为工程地质条件复杂的高山峡谷地貌,存在大量监测难度较大的滑坡体。为加强对HD库区CYP滑坡的监测,利用2020年7月至2021年7月之间的28景Sentinel-1A降轨和24景Sentinel-1A升轨雷达影像,采用SBAS-InSAR技术分析获取CYP滑坡升降轨时间序列形变速率。结果表明,CYP滑坡LOS向最大形变速率为-150 mm/a,垂直向累计最大形变为-172 mm,处于持续滑动状态。通过将SBAS升降轨时序监测结果与已有GNSS监测数据对比分析,在CYP滑坡区域降轨影像分析结果分解出的垂直向形变与GNSS垂直向形变契合度较高,符合实际情况,可以为滑坡识别和预警提供参考。此外,将时序形变与水库水位、降雨量进行对比分析发现,CYP滑坡形变情况与库区水位、降雨密切相关。Located in the northwestern region of Yunnan Province within the Lancang River Basin,the HD Reservoir area features a highmountain canyon terrain with complex engineering geological conditions,hosting numerous landslides that pose significant monitoring challenges.In order to enhance monitoring of the CYP landslide in the HD reservoir area,this study utilized 28 descending and 24 ascending radar images from the Sentinel-1A satellite between July 2020 and July 2021.The SBAS-InSAR technique was employed to analyze and obtain the temporal deformation rates of the CYP landslide in both ascending and descending tracks.The results indicate that the maximum deformation rate in the Line of Sight(LOS)direction of the CYP landslide is-150 mm/a,with a cumulative maximum vertical deformation of-172 mm,indicating continuous sliding.By comparing and analyzing the temporal monitoring results of the ascending and descending tracks with the existing GNSS monitoring data,it was found that the vertical deformation extracted from the descending track analysis results in the CYP landslide area exhibits a high degree of consistency with the GNSS vertical deformation,aligning well with the actual situation,which can provide valuable insights for landslide identification and early warning systems.Furthermore,comparative analysis of temporal deformation with reservoir water levels and rainfall revealed a close correlation between the deformation of the CYP landslide and reservoir water levels,as well as rainfall in the area.

关 键 词：SBAS-InSAR Sentinel-1A 滑坡监测 时序分析 

分 类 号：TV698.232[水利工程—水利水电工程]