Land subsidence in Beijing and its relationship with geological faults revealed by Sentinel-1 InSAR observations

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Title: Land subsidence in Beijing and its relationship with geological faults revealed by Sentinel-1 InSAR observations
Authors: Hu, Leyin | Dai, Keren | Xing, Chengqi | Li, Zhenhong | Tomás, Roberto | Clark, Beth | Shi, Xianlin | Chen, Mi | Zhang, Rui | Qiu, Qiang | Lu, Yajun
Research Group/s: Ingeniería del Terreno y sus Estructuras (InTerEs)
Center, Department or Service: Universidad de Alicante. Departamento de Ingeniería Civil
Keywords: InSAR | Sentinel-1 TOPS data | Beijing land subsidence | Geological faults
Knowledge Area: Ingeniería del Terreno
Issue Date: Oct-2019
Publisher: Elsevier
Citation: International Journal of Applied Earth Observation and Geoinformation. 2019, 82: 101886. doi:10.1016/j.jag.2019.05.019
Abstract: Beijing, the capital city of China, has been affected by land subsidence due to intensive groundwater extraction since 1935. Recent studies reported that the maximum subsidence occurred in the east of Beijing, reaching more than 11 cm/year till 2017. To investigate the subsidence (2015˜2017) in Beijing, in this paper, time series interferometric synthetic aperture radar (TS-InSAR) analysis was performed with 22 Sentinel-1 Terrain Observation by Progressive Scans (TOPS) mode SAR data. Results show that wide areas in the east of Beijing are subsiding with a maximum rate of 14 cm/year, which is consistent with GPS data. Detailed analysis of the obtained subsidence map reveals the existence of several characteristic near-linear boundaries within the subsiding areas. As a result of our previous three-year project, we generated the exact location, direction, and late Quaternary activity of the main potential active faults in the Beijing area. The relationship between the trace of these existing geological faults and the mentioned subsidence boundaries was investigated in detail. It is suggested that land subsidence in Beijing was mainly caused by the over-extraction of groundwater, with its spatial pattern being controlled by geological faults.
Sponsor: This work was funded by Science for Earthquake Resilience of China (XH18001Y), National Natural Science Foundation of China (No. 41801391, No. 41771402, No. 41601503, No. 41201419), Creative Research Groups of China (No. 41521002), National Key Research and Development Program of China (No. 2017YFB0502704, No. 2017YFB0503803), the project from Beijing Financial Project of China (JCSJXT). Part of this work was also supported by the UK NERC through the Centre for the Observation and Modelling of Earthquakes, Volcanoes and Tectonics (COMET, ref.: come30001), the LICS and CEDRRIC projects (ref. NE/K010794/1 and NE/N012151/1, respectively), the ESA-MOST DRAGON-4 project (ref. 32244), Spanish Ministry of Economy, Industry and Competitiveness (MINECO), the State Agency of Research (AEI) and the European Funds for Regional Development (FEDER) under projects TEC2017-85244-C2-1-P and TIN2014-55413-C2-2-P and the Spanish Ministry of Education, Culture and Sport under project PRX17/00439.
ISSN: 0303-2434
DOI: 10.1016/j.jag.2019.05.019
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2019 Elsevier B.V.
Peer Review: si
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