Detecting the Amount of Eroded and Deposited Sand Using DInSAR

  • Author(s): Xiaotao Chang, Jinyun Guo, and Xiaoqing Wang
  • DOI: 10.3319/TAO.2010.08.13.02(TibXS)
  • Keywords: DInSAR, Hunshandake Sandy Land, Monitoring, Sandstorm, Aeolian processes
  • Citation: Chang, X., J. Guo, and X. Wang, 2011: Detecting the amount of eroded and deposited sand using DInSAR. Terr. Atmos. Ocean. Sci., 22, 187-194, doi: 10.3319/TAO.2010.08.13.02(TibXS)

DInSAR techniques can be used to monitor changes in desert height due to sandstorms. Hunshandake Sandy Land was used as the test area and was a main source of sand in the vicinity of Beijing. In order to study the source of sandstorm and its impact, a pair of EnviSat ASAR images for January 20 and October 26, 2004 were processed. After the image configuration, flat earth effect correction, data filtering, phase unwrapping and geo-coding, a deformation model over Hunshandake was built. The deformation in the test area ranges from -160 to +120 cm, and the height increased in most areas and decreased in a few locations, which is generally consistent with the sandstorm appearing at Beijing during 2004.

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