基于DS-InSAR技术的西宁市地表沉降监测

Monitoring and Analysis of Surface Subsidence in Xining Area by DS-InSAR

为了准确监测西宁市的地表沉降情况,基于西宁市2020年9月至2022年8月的58景Sentinel-1A影像数据,采用DS-InSAR技术对西宁市的地表沉降进行监测与分析。结果表明:西宁市有4处明显沉降区域,市区周边西宁南绕城高速附近沉降范围和量级较大,最大沉降速率达到62 mm/a,变形区域沉降速率范围为20~40 mm/a;检测结果可以对西宁市地质灾害防治工作提供参考。

In order to accurately monitor the land subsidence in Xining,based on 58 Sentinel-1A image data of Xining from September 2020 to August 2022,DS-InSAR technology was used to monitor and analyze the land subsidence in Xining.The results show that there are four obvious subsidence areas in Xining city,and the subsidence range and magnitude near Xining South Ring Expressway around the urban area are large,with the maximum subsidence rate reaching 62 mm/a and the subsidence rate in the deformed area ranging from 20 to 40 mm/a.The detection results provide reference for the prevention and control of geological disasters in Xining city.