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Surface Subsidence Analysis by Multi-Temporal InSAR and GRACE: A Case Study in Beijing

Guo, Jiming, Zhou, Lv, Yao, Chaolong, and Hu, Jiyuan, 2016. Surface Subsidence Analysis by Multi-Temporal InSAR and GRACE: A Case Study in Beijing. Sensors, 16(9):1495, doi:10.3390/s16091495.

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BibTeX

@ARTICLE{2016Senso..16.1495G,
       author = {{Guo}, Jiming and {Zhou}, Lv and {Yao}, Chaolong and {Hu}, Jiyuan},
        title = "{Surface Subsidence Analysis by Multi-Temporal InSAR and GRACE: A Case Study in Beijing}",
      journal = {Sensors},
     keywords = {multi-temporal InSAR, GRACE, surface subsidence, Beijing, groundwater},
         year = 2016,
        month = sep,
       volume = {16},
       number = {9},
          eid = {1495},
        pages = {1495},
     abstract = "{The aim of this study was to investigate the relationship between
        surface subsidence and groundwater changes. To investigate this
        relationship, we first analyzed surface subsidence. This paper
        presents the results of a case study of surface subsidence in
        Beijing from 1 August 2007 to 29 September 2010. The Multi-
        temporal Interferometric Synthetic Aperture Radar (multi-
        temporal InSAR) technique, which can simultaneously detect
        point-like stable reflectors (PSs) and distributed scatterers
        (DSs), was used to retrieve the subsidence magnitude and
        distribution in Beijing using 18 ENVISAT ASAR images. The multi-
        temporal InSAR-derived subsidence was verified by leveling at an
        accuracy better than 5 mm/year. Based on the verified multi-
        temporal InSAR results, a prominent uneven subsidence was
        identified in Beijing. Specifically, most of the subsidence
        velocities in the downtown area were within 10 mm/year, and the
        largest subsidence was detected in Tongzhou, with velocities
        exceeding 140 mm/year. Furthermore, Gravity Recovery and Climate
        Experiment (GRACE) data were used to derive the groundwater
        change series and trend. By comparison with the multi-temporal
        InSAR-derived subsidence results, the long-term decreasing trend
        between groundwater changes and surface subsidence showed a
        relatively high consistency, and a significant impact of
        groundwater changes on the surface subsidence was identified.
        Additionally, the spatial distribution of the subsidence funnel
        was partially consistent with that of groundwater depression,
        i.e., the former possessed a wider range than the latter.
        Finally, the relationship between surface subsidence and
        groundwater changes was determined.}",
          doi = {10.3390/s16091495},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2016Senso..16.1495G},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

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