Abstract
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.
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Foundation item: Supported by the National Natural Science Foundation of China(61331016)
Biography: TANG Wei, male, Ph.D. candidate, research direction: satellite radar interferometry for earth surface deformation.
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Tang, W., Liao, M. Taiyuan City subsidence observed with Persistent Scatterer InSAR. Wuhan Univ. J. Nat. Sci. 19, 526–534 (2014). https://doi.org/10.1007/s11859-014-1048-7
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DOI: https://doi.org/10.1007/s11859-014-1048-7