Journal of Geodesy and Geoinformation Science ›› 2021, Vol. 4 ›› Issue (1): 70-76.doi: 10.11947/j.JGGS.2021.0109

• Special Issue • Previous Articles     Next Articles

Land Subsidence in Xiong’an New Area, China Revealed by InSAR Observations

Keren DAI1,2(),Peilian RAN1,Zhenhong LI3,4(),Julian AUSTIN5,Jan-Peter MULLER6,Qiming ZENG7,Jingfa ZHANG8,Leyin HU9   

  1. 1. College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China
    2. State Key Laboratory of Geohazard Prevention and Geoenviroment Protection, Chengdu University of Technology, Chengdu 610059, China
    3. College of Geological Engineering and Geomatics, Chang’an University, Xi’an 710054, China
    4. Key Laboratory of Western China’s Mineral Resource and Geological Engineering, Ministry of Education, Xi’an 710054, China
    5. School of Mathematics, Statistics & Physics, Newcastle University, Newcastle upon Tyne NE1 7RU, UK
    6. Mullard Space Science Laboratory, Department of Space and Climate Physics, University College London, Holmbury St Mary RH5 6NT, UK
    7. School of Earth and Space Sciences, Peking University, Beijing 100871, China
    8. Key Laboratory of Crustal Dynamics, Institute of Crustal Dynamics, China Earthquake Administration, Beijing 100085, China
    9. Beijing Earthquake Agency, Beijing 100080, China
  • Received:2020-10-10 Accepted:2020-12-25 Online:2021-03-20 Published:2021-04-06
  • Contact: Zhenhong LI E-mail:daikeren17@cdut.edu.cn;Zhenhong.Li@chd.edu.cn
  • About author:Keren DAI (1989-), male, PhD, professor, majors in geohazard evaluation and prevention using InSAR and remote sensing techniques. E-mail: daikeren17@cdut.edu.cn
  • Supported by:
    National Natural Science Foundation of China(41941019);National Natural Science Foundation of China(41801391);UK NERC through the Centre for the Observation and Modelling of Earthquakes, Volcanoes and Tectonics(come30001)

Abstract:

In 2017, China’s central government approved the national strategy to build Xiong’an New Area (XNA, 100km southwest to Beijing), which was announced as a “millennium strategy” and a “demo area” for a sustainable, modern, and innovative urban model. Xiong’an will draw in as much as $380 billion investment and is expected to help accelerate the development of the wider Beijing-Tianjin-Hebei (Jingjinji) Area. In this paper, present subsidence in the XNA area is investigated using InSAR observations for the first time. The 24 SAR images acquired by European Space Agency’s Sentinel-1 satellites during the period from June 2017 to July 2018 suggest that in the north of Xiong County, the subsidence rate reaches up to 90mm/y, which is highly correlated with the exploitation of geothermal drilling. As the construction in the XNA area will significantly accelerate and its high-quality development, the InSAR findings could provide valuable information for future sustainable urban planning and underground infrastructure construction.

Key words: Xiong’an New Area; subsidence; InSAR; geothermal heating; Sentinel-1