remote sensing Article Recent Ground Subsidence in the North China Plain, China, Revealed by Sentinel-1A Datasets Min Shi 1,2,3,4 , Huili Gong 1,2,3,4,*, Mingliang Gao 1,2,3,4 , Beibei Chen 1,2,3,4, Shunkang Zhang 1,2,3,4 and Chaofan Zhou 1,2,3,4 1 Key Laboratory of Mechanism, Prevention and Mitigation of Land Subsidence, Capital Normal University, Beijing 100048, China;
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[email protected] (C.Z.) 2 Beijing Laboratory of Water Resources Security, Capital Normal University, Beijing 100048, China 3 College of Resources Environment and Tourism, Capital Normal University, Beijing 100048, China 4 Observation and Research Station of Groundwater and Land Subsidence in Beijing-Tianjin-Hebei Plain, Beijing 100048, China * Correspondence:
[email protected] Received: 1 October 2020; Accepted: 29 October 2020; Published: 31 October 2020 Abstract: Groundwater resources have been exploited and utilized on a large scale in the North China Plain (NCP) since the 1970s. As a result of extensive groundwater depletion, the NCP has experienced significant land subsidence, which threatens geological stability and infrastructure health and exacerbates the risks of other geohazards. In this study, we employed multi-track Synthetic Aperture Radar (SAR) datasets acquired by the Sentinel-1A (S1A) satellite to detect spatial and temporal distributions of surface deformation in the NCP from 2016 to 2018 based on multi-temporal interferometric synthetic aperture radar (MT-InSAR). The results show that the overall ground displacement ranged from 165.4 mm/yr (subsidence) to 9.9 mm/yr (uplift) with a standard variance − of 28.8 mm/yr.