Spatial and temporal subsidence characteristics in Wuhan (China), during 2015–2019, inferred from Sentinel-1 synthetic aperture radar (SAR) interferometry
Year: 2021
Type: article
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.
Authors: Xuguo Shi, Shaocheng Zhang, Mi Jiang, Yuanyuan Pei, Tengteng Qu, Jinhu Xu, Chen Yang
Language: English
Subfield: Aerospace Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,553
Awards: G4015610709, G5963826047
OpenAlex ID: W3135043659