Understanding Uneven Land Subsidence in Beijing, China, Using a Novel Combination of Geophysical Prospecting and InSAR

Lin Guo, Huili Gong, Jiwei Li, Lin Zhu, Aimin Xue, Lin Liao, Ying Sun, Yongsheng Li, Zhenxin Zhang, Leyin Hu, Mingliang Gao, Chaofan Zhou, Rui Cheng, Jiahui Zhou

Research output: Contribution to journalArticlepeer-review

Abstract

A novel approach was developed to quantitatively examine land subsidence. It combines a new geophysical (NG) prospecting and the interferometric synthetic aperture radar (InSAR) technology to explore uneven development of land subsidence in Beijing, China. We derived land subsidence spatial information over 4 years (from November 2014 to July 2018) based on Sentinel-1 satellite imagery and the small-baseline InSAR (SBAS-InSAR) method. Also, profile data were acquired using seismic frequency resonance (SFR) approach in a few settlement areas. We developed a geological model based on boreholes and SFR data. Thus, we can quantitively study the driving forces of a typical uneven land subsidence. We found that faults are controlling spatial developments of land subsidence in Beijing. The subsidence rates have different values along the same fault. Also, we revealed the contributions of compressible layers to the formation of uneven land subsidence.

Original languageEnglish (US)
Article numbere2020GL088676
JournalGeophysical Research Letters
Volume47
Issue number16
DOIs
StatePublished - Aug 28 2020

Keywords

  • InSAR
  • InSAR-SFR integration
  • land subsidence
  • seismic frequency resonance (SFR)
  • subsidence driving forces

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

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