SBAS-In SAR下小湾水库-澜沧江段库岸滑坡空间分布统计  

Statistical on the spatial distribution of reservoir bank landslides in the Xiaxiaowan Reservoir-Lancang River section of SBAS-InSAR

作　　者：洪文玉 喜文飞 钱堂慧 郭峻杞 靳婷婷 HONG Wenyu;XI Wenfei;QIAN Tanghui;GUO Junqi;JIN Tingting(Faculty of Geography,Yunnan Normal University,Kunming 650500,China;Key Laboratory of Highland Geographic Processes and Environmental Change in Yunnan Province,Kunming 650500,China)

机构地区：[1]云南师范大学地理学部,昆明650500 [2]云南省高原地理过程与环境变化重点实验室,昆明650500

出　　处：《测绘科学》2024年第10期59-68,共10页Science of Surveying and Mapping

基　　金：云南省重大科技专项(202202AD080010)。

摘　　要：针对以往滑坡空间分布统计缺少动态因子,未考虑长时间序列滑坡隐患动态变化的问题,该文利用升降轨合成孔径雷达(SAR)数据,采用短基线集差分干涉技术对小湾库区-澜沧江段2021年9月—2023年9月的41景Sentinel-1A升轨与47景Sentinel-1A降轨影像进行形变反演。结合形变数据进行库岸滑坡空间分布统计研究,并利用地理探测器探测海拔、坡度、坡向、地层岩性等因子对滑坡的贡献率。结果表明,小湾水库-澜沧江段整体形变为-112.3~120.9 mm/a;对滑坡的空间分布进行统计分析,滑坡的分布主要集中在海拔1300~1500 m之间、坡度在30°~45°之间、坡向在东北、正东和西南方向,岩性为软岩等区域,海拔、坡度、坡向、地层岩性对滑坡的贡献率分别为0.359、0.126、0.103、0.553。研究结果能够为水库库岸灾害的防治提供参考。In view of the lack of dynamic factors in the spatial distribution statistics of landslides in the past,and the dynamic changes of long-term series landslide hazards were not considered,synthetic aperture radar(SAR)data of the ascending and lowering rails and the short baseline set differential interferometry technique were used to carry out the deformation inversion of the 41 Sentinel-1A ascending and 47 Sentinel-1A descending images from September 2021 to September 2023 in the Xiaowan Reservoir Area-Lancang River section in this paper.The contribution rate of slope,aspect,stratum lithology and other factors to the landslide.The results showed that the overall deformation of the Xiaowan Reservoir-Lancang River section was-112.3~120.9 mm/a;the spatial distribution of landslides was statistically analyzed,and the distribution of landslides was mainly concentrated between 1300 and 1500 m above sea level,between 30°and 45°,The slope direction was northeast,due east,and southwest,and the lithology was soft rock,and the contribution rates of altitude,slope,aspect,and stratum lithology to the landslide were 0.359,0.126,0.103,and 0.553,respectively.The research results could provide reference for the prevention and control of reservoir and bank disasters.

关 键 词：SBAS-InSAR 空间分布 滑坡灾害 形变监测 统计分析 

分 类 号：P237[天文地球—摄影测量与遥感] P642.22[天文地球—测绘科学与技术]