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Understanding Uneven Land Subsidence in Beijing, China, Using a Novel Combination of Geophysical Prospecting and InSAR
Author(s) -
Guo Lin,
Gong Huili,
Li Jiwei,
Zhu Lin,
Xue Aimin,
Liao Lin,
Sun Ying,
Li Yongsheng,
Zhang Zhenxin,
Hu Leyin,
Gao Mingliang,
Zhou Chaofan,
Cheng Rui,
Zhou Jiahui
Publication year - 2020
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2020gl088676
Subject(s) - interferometric synthetic aperture radar , beijing , geology , subsidence , satellite , remote sensing , borehole , seismology , synthetic aperture radar , geodesy , china , geomorphology , structural basin , geography , geotechnical engineering , archaeology , engineering , aerospace engineering
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.