摘要
针对InSAR变形监测成本低、广域普查的特点,利用Sentinel-1A影像,对洛阳市某水库蓄水初期进行时序InSAR变形监测。经过变形监测将研究区划分为4个滑坡隐患区及4个城镇疑似沉降区,采用遥感普查+重点监测方案,对库区进行拦水坝变形分析、地质灾害高发区普查、城镇地表变形监测,最后整体评估水库蓄水工程对城镇地质扰动的影响。结果表明:2020—2021年水库拦水坝中部为形变显著区,2年间最大累计变形为54.1 mm,两侧变形数值呈对称状分布,符合迎水压力结构受力特征;水利工程建设对周边城镇的扰动几乎可以忽略不计,测区内整体呈稳定状态。时序InSAR技术非接触式监测地表地物变形,可为水库巡检预警机制提供新的技术方案。
In view of the characteristics of InSAR deformation monitoring in low lost and large-scale survey,Sentinel-1A image data is used to monitor the temporal InSAR deformation of a reservoir in Luoyang City at the initial stage of fi lling.After deformation monitoring,the study area is divided into 4 hidden landslide areas and 4 urban suspected subsidence areas.The remote sensing survey and key monitoring method is adopted to conduct dam deformation analysis,survey of areas with high incidence of geological disasters,and urban surface deformation monitoring in the reservoir area.Finally,the overall assessment of reservoir project impact on urban geological disturbance is formed.The results show that there is a signifi cant deformation in the central part of dam during 2020 to 2021,and the maximum cumulative deformation in 2 years is 54.1 mm.The deformation values on both sides of dam are distributed symmetrically,which is consistent with the stress characteristics of water-facing pressure.The disturbance caused by water conservancy project construction to surrounding towns is almost negligible,and the overall state within the survey area is stable.Based on time series InSAR technology,non-contact monitoring of surface deformation provides a new technical solution for reservoir inspection and early warning mechanism.
作者
郭子琦
韩锦琳
王媛
潘子轩
GUO Ziqi;HAN Jinlin;WANG Yuan;PAN Zixuan(Henan Water Conservancy Survey.,Ltd.,Zhengzhou 450008,China)
出处
《水利信息化》
2024年第2期42-46,共5页
Water Resources Informatization
基金
河南省2022年度水利科技攻关项目(GG202215)。
关键词
INSAR
时序
变形监测
水库
拦水坝
地质灾害
InSAR
temporal
deformation monitoring
reservoir
barrage dam
geologic hazard
作者简介
郭子琦(1996-),女,辽宁锦州人,硕士,主要从事基于InSAR技术的工程地质与地质灾害等方面的研究工作。E-mail:gzq1996777@163.com。
