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Science China Earth Sciences

, Volume 54, Issue 5, pp 720–732 | Cite as

Three Gorges Dam stability monitoring with time-series InSAR image analysis

  • Teng Wang
  • Daniele Perissin
  • Fabio Rocca
  • Ming-Sheng Liao
Research Paper

Abstract

In this paper, we carried out a combination of permanent scatterer and quasi permanent scatterer time-series InSAR image analyses to extract geometric information over the area of the Three Gorges Dam. For the first time, we measured and analyzed the deformation of the Three Gorges Dam and its surrounding area using 40 SAR images acquired from 2003 to 2008. Our results indicate that the temporal deformation of the left part of the dam has ceased and that the deformation of the dam was influenced by the changing level of the Yangtze River. Seasonal deformation due to varying temperature is also observed. The obtained results agree well with the published results of the Three Gorges Dam deformation obtained by employing conventional survey methods. We also found that there is an area of abnormal subsidence near Zigui County. This paper demonstrates the potential of time-series InSAR image analysis in the monitoring of dam stability and measurement of subsidence.

Keywords

Three Gorges Project deformation monitoring InSAR permanent scatterer analysis 

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Copyright information

© Science China Press and Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Teng Wang
    • 1
    • 2
  • Daniele Perissin
    • 3
    • 2
  • Fabio Rocca
    • 2
  • Ming-Sheng Liao
    • 1
  1. 1.State Key Laboratory of Information Engineering in Surveying, Mapping and Remote SensingWuhan UniversityWuhanChina
  2. 2.Dipartimento di Elettronica e InformazionePolitecnico di MilanoMilanItaly
  3. 3.Institute of Space and Earth Information ScienceChinese University of Hong KongHong KongChina

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