人民长江2024，Vol.55Issue(1)：143-150,8.DOI:10.16232/j.cnki.1001-4179.2024.01.020
基于InSAR的乌东德水电站库区边坡形变监测及分析
Monitoring and analysis of slope deformation in Wudongde Hydropower Station reservoir area based on InSAR
摘要
Abstract
Following the commissioning of hydropower stations,frequent water level fluctuations in the upstream reservoir area induced by activities such as reservoir storage and flood discharge,alter the original stability of the reservoir bank slopes.This al-teration poses a significant risk of slope instability and damage,thereby impacting the safe operation of the hydropower station and posing potential safety hazards to the surrounding residential areas.To comprehensively understand the deformation of reservoir bank slopes during the impoundment of Wudongde Hydropower Station,sentinel data from ascending and descending orbits were processed using SBAS-InSAR technology for the period from May 2020 to August 2022.This study obtained surface deformation characteristics in the research area.By integrating reservoir water level variations with the SAR-derived slope soil moisture con-tent backscattering coefficient,the deformation mechanisms of five identified unstable areas were analyzed.The results indicate that the use of ascending and descending InSAR accurately identifies the deformation of reservoir bank slopes,with the maximum annual average subsidence rate in the study area reaching-92 mm/a.The deformation trend of reservoir bank slopes exhibits a pronounced correlation with changes in reservoir water levels and soil moisture content backscattering coefficients.Reservoir im-poundment is the main factor causing the accelerated settlement of slope.关键词
库区边坡/形变监测/土壤含水量后向散射系数/滑坡识别/InSAR/升降轨/乌东德水电站Key words
slope in reservoir area/deformation monitoring/soil moisture content backscattering coefficient/landslide identifica-tion/InSAR/ascending and descending/Wudongde Hydropower Station分类
天文与地球科学引用本文复制引用
毕自航,李素敏,袁利伟,蔺瑜..基于InSAR的乌东德水电站库区边坡形变监测及分析[J].人民长江,2024,55(1):143-150,8.基金项目
国家自然科学基金项目(52364020,42161067) （52364020,42161067）
云南省重点研发计划项目(202301AT070463) （202301AT070463）
