邢台市2019~2021年地表形变SBAS-InSAR监测及分析

SBAS-InSAR Monitoring and Analysis of Surface Deformation in Xingtai City from 2019 to 2021

摘要: 长期超采地下水导致邢台市地表发生了大范围的沉降，这严重威胁了邢台市社会经济发展。本文以邢台市为研究区，采用2019年1月3日至2021年1月28日年的64景Sentinel-1A影像数据，利用短基线集(Small Baseline Subset Interferometric Synthetic Aperture Radar, SBAS-InSAR)技术对邢台市地面沉降进行监测，以获取该区地面沉降速率和累积沉降量，探究邢台市地面沉降状况，为邢台市地面沉降灾害的防治及资源开发利用规划提供基础依据。研究发现，邢台市东部存在一个范围较大的沉降区域，沉降面积约为1689 km²，沉降速率约为80 mm/year，沉降范围没有扩大，但呈现出沉降加剧的趋势；此外，邢台市西部有多个面积较小的沉降漏斗，主要分布在邢台县(Q1)和内丘县(Q2)，最大沉降速率达到150 mm/year。在此基础上，对邢台市东部地下水埋深变化及西部矿区分布与沉降区分布进行了对比分析，结果表明东部地下水埋深高的区域地面沉降呈加剧趋势，西部矿区开采对邢台市的地面沉降产生一定的影响。

Abstract: The long-term over-exploitation of groundwater has led to a large-scale subsidence of the surface of Xingtai City, which seriously threatens the economic and social development of Xingtai City. This paper takes Xingtai City as the research area, and uses 64-scene Sentinel-1A image data from January 3, 2019 to January 28, 2021. Small Baseline Subset Interferometric Synthetic Aperture Radar (SBAS-INSAR) technology was used to monitor the land subsidence in Xingtai City, so as to obtain the land subsidence rate and cumulative subsidence volume in this area, explore the land subsidence situation in Xingtai City, and provide a basis for the prevention and control of land subsidence disasters and resource development and utilization planning in Xingtai City. The study found that there was a large subsidence area in the east of Xingtai City, with a subsidence area of about 1689 km² and a subsidence rate of about 80 mm/year. The subsidence range did not expand, but showed a trend of intensified subsidence; in addition, there are several smaller sedimentation funnels in the western part of Xingtai City, which are mainly distributed in Xingtai County (Q1) and Neiqiu County (Q2), with a maximum settlement rate of 150 mm/year. On this basis, this paper compares and analyzes the changes of groundwater burial depth in eastern Xingtai City and the distribution of mining areas in western China and subsidence areas. The results show that the land subsidence in the region with high groundwater depth in the east is increasing, and the mining in the west has a certain impact on the land subsidence in Xingtai City.