Preprints
https://doi.org/10.5194/nhess-2021-35
https://doi.org/10.5194/nhess-2021-35

  04 Mar 2021

04 Mar 2021

Review status: this preprint is currently under review for the journal NHESS.

Spatial and temporal subsidence characteristics in Wuhan city (China) during 2015–2019 inferred from Sentinel-1 SAR Interferometry

Xuguo Shi1, Shaocheng Zhang1, Mi Jiang2, Yuanyuan Pei3, Tengteng Qu4,5,6, Jinhu Xu1, and Chen Yang7 Xuguo Shi et al.
  • 1School of Geography and Information Engineering, China University of Geosciences, Wuhan, 430074, China
  • 2School of Geospatial Engineering and Science, Sun Yat-Sen University, Guangzhou, 510275, China
  • 3School of Civil Engineering, Anhui Jianzhu University, Hefei, 230601, China
  • 4College of Engineering, Peking University, Beijing, 100871, China
  • 5China-Pakistan Joint Research Center on Earth Sciences, Islamabad, 45320, Pakistan
  • 6State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China
  • 7Institute of karst geology, CAGS/ Key Laboratory of Karst Dynamics, MNR & GZAR, Guilin, 541004, China

Abstract. Ground subsidence is regarded as one of the most common geohazards accompanied with the rapid urban expansion in recent years. In the last two decades, Wuhan located in the alluvial Jinaghan Plain has experienced great urban expansion with increased subsidence issues, i.e. soft foundation subsidence and karst collapses. Here we investigated subsidence rates in Wuhan city with 2015–2019 Sentinel-1 SAR images. We found that the overall subsidence over Wuhan region is significantly correlated with the distribution of engineering geological regions (EGSs). We further validated the InSAR measurements with better than 5 mm accuracy by comparing with leveling measurements. Subsidence centers in Qingling-jiangdi, Houhu, Qingshan and Dongxihu area were identified with displacement rates of approximately 30 mm/yr. Our results demonstrated that the dominant driven factor is ongoing constructions and the subsidence centers shifted with construction intensities. Qingling-Jiangdi area in our study is a well-known sites of karst collapses. We find the nonlinear subsidence of this area is correlated with the water level variations of the Yangtze River.

Xuguo Shi et al.

Status: open (until 21 Apr 2021)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on nhess-2021-35', Anonymous Referee #1, 08 Apr 2021 reply
  • CC1: 'Comment on nhess-2021-35', Deodato Tapete, 12 Apr 2021 reply

Xuguo Shi et al.

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