基于InSAR技术的白龙江中游滑坡地表形变监测与成因分析  

Surface deformation monitoring and cause analysis of landslides in the middle reaches of Bailong River based on InSAR technology

作　　者：彭思佳 陈聪 白艳萍 马金辉[1] PENG Si-jia;CHEN Cong;BAI Yan-ping;MA Jin-hui(College of Earth and Environmental Sciences,Lanzhou University,Lanzhou 730000,China;Yellow River Soil and Water Conservation and Tianshui Management Supervision Bureau,Tianshui 741000,Gansu,China)

机构地区：[1]兰州大学资源环境学院,兰州730000 [2]黄河水土保持天水治理监督局,甘肃天水741000

出　　处：《兰州大学学报（自然科学版）》2022年第4期492-501,共10页Journal of Lanzhou University(Natural Sciences)

基　　金：国家科技支撑计划项目(2011BAK12B06);甘肃省民生科技计划项目(1503FCME006);第二次青藏高原综合科学考察研究项目(2019QZKK0905)。

摘　　要：地表形变监测与成因分析是预防滑坡灾害的关键过程,合成孔径雷达干涉测量(InSAR)技术在此领域具有巨大的应用潜力,然而InSAR一维视线向的形变结果难以分析滑坡成因.本研究利用升降两轨InSAR形变数据集,基于数据几何参数,分解得到垂向和东西水平向形变结果,探究白龙江中游滑坡地表形变及成因.结果表明,该地区的滑坡水平向形变普遍大于垂向形变,以浅表层破碎岩体堆积物迁移形变为主;区内滑坡发育受活动断层、降雨、人类活动的影响,活动断层对滑坡发育起控制作用,根据两种作用方式将滑坡分为近平行构造带滑坡和近垂直构造带滑坡;降雨和人类活动都为滑坡的诱发因素,降雨引起的形变加速时间在雨季,人类活动引起的形变突变时间与工程建设时间相符.Landslide surface deformation monitoring and cause analysis are the key to preventing landslide disasters. In this field, the interferometric synthetic aperture radar(InSAR) technology has great application potential. InSAR deformation results are one-dimensional line-of-sight results, which are difficult to analyze the causes of landslides. We use the lifting and lowering two-track InSAR deformation data set, and the geometric parameters to decomposed it into vertical and east-west horizontal deformation results. These are used to explore the deformation and its causes of the landslide in the middle reach of Bailong River. The horizontal deformation of the landslide is generally greater than the vertical deformation, mainly due to the migration and deformation of the shallow-surface fractured rock mass deposits. The development of landslides in the study area is affected by active faults, rainfall, and human activities. Active faults control the development of landslides. According to its two modes of action,landslides are divided into nearly parallel structural belt landslides and nearly vertical structural belt landslides. Both rainfall and human activities are the inducing factors of landslides. The acceleration time of deformation caused by rainfall is in the rainy season, and the time of deformation mutation caused by human activities is consistent with the construction time of the project.

关 键 词：合成孔径雷达干涉测量 滑坡 早期识别 成因分析 白龙江 

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]