摘要
为了实现对呼和浩特市城区形变监测,采用永久散射体合成孔径雷达干涉测量(PS-InSAR)技术,对2017年3月—2021年4月期间25景呼和浩特市城区Sentinel-1A数据进行时序干涉处理,提取了城区地表沉降信息,并分析了主要沉降中心沉降原因。结果表明:呼和浩特市城区地表存在5个明显的沉降中心,整体地表平均年沉降速率3.65 mm/a,平均累计沉降量为15.50 mm,其沉降主要原因是由于地下水过度开采。Sentinel-1A数据具有时间基线短、影像数量足、数据免费等优点,利于InSAR时序分析,可满足同类城区地表形变监测工作,服务城市安全。
In order to realize the monitoring of deformation in the urban area of Hohhot city,this paper uses the permanent scatterer synthetic aperture radar interferometry(PS-InSAR)technique to perform temporal interferometric processing on 25 scenes of Sentinel-1A data from March 2017 to April 2021 in the urban area of Hohhot city to extract the surface subsidence information in the urban area and analyze the causes of subsidence in the main subsidence centers.The results show that there are five obvious centres of subsidence in the urban area of Hohhot,and that the overall average annual surface subsidence rate is 3.65 mm/a,with an average cumulative subsidence of 15.50 mm.The subsidence is mainly due to over-exploitation of groundwater.Given that the free Sentinel-1A data has the advantages of short time baseline and sufficient number of images,it is conducive to InSAR time series analysis,which can meet similar urban surface deformation monitoring work and serve urban safety.
作者
尹承深
刘全明
王福强
YIN Chengshen;LIU Quanming;WANG Fuqiang(College of Water Conservancy and Civil Engineering,Inner Mongolia Agricultural University,Hohhot,Inner Mongolia 010018,China;Autonomous Regional Collaborative Innovation Center for Integrated Management of Water Resources and Water Environment in the Inner Mongolia Reaches of the Yellow River,Hohhot,Inner Mongolia 010018,China)
出处
《中国地质灾害与防治学报》
CSCD
2023年第2期73-81,共9页
The Chinese Journal of Geological Hazard and Control
基金
国家自然科学基金项目(52069020)。
