Taiyuan City subsidence observed with Persistent Scatterer InSAR

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• 作者：Wei Tang (1)
  Mingsheng Liao (1)
  
• 关键词：ground subsidence ; Synthetic Aperture Radar interferometry ; persistent scatterer ; P 237
• 刊名：Wuhan University Journal of Natural Sciences
• 出版年：2014
• 出版时间：December 2014
• 年：2014
• 卷：19
• 期：6
• 页码：526-534
• 全文大小：1,421 KB
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• 作者单位：Wei Tang (1)
  Mingsheng Liao (1)
  
  1. State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan, 430079, Hubei, China
  
• ISSN：1993-4998

文摘

C- and X-bands Synthetic Aperture Radar (SAR) images acquired from February 2009 to September 2010 were processed with Persistent Scatterer Interferometry (PS-InSAR) algorithm to investigate spatial and temporal variations in deformation over Taiyuan City, China. The spatial pattern of subsidence and the magnitude of subsidence rate are similar in the velocity field maps achieved by the algorithm from these two data sets. It shows that there are four primary subsidence centers in Taiyuan City: Xiayuan, Wujiabao, Xiaodian, Sunjiazhai, which are near the groundwater extraction wells. The maximum subsidence rate is up to 70 mm/year at Sunjiazhai. The locus of maximum subsidence has shifted from its historical location in the north to the south. In view of the severe shortage of water resources and presented features of subsidence over Taiyuan City, we inferred that excessive pumping of groundwater was the dominant reason of land subsidence.