Land Uplift Monitoring and Analysis in Yan'an New District Based on SBAS-InSAR Technology

被引：0
|
作者：
Pu C. [1 ]
Xu Q. [1 ]
Zhao K. [1 ]
Jiang Y. [1 ]
Liu J. [1 ]
Kou P. [1 ]
机构：
[1] State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu
来源：
Wuhan Daxue Xuebao (Xinxi Kexue Ban)/Geomatics and Information Science of Wuhan University | 2021年 / 46卷 / 07期
基金：
中国国家自然科学基金;
关键词：
Deformation monitoring; Land uplift; Mountain excavation and city construction; SBAS-InSAR; Yan'an New District;
D O I：
10.13203/j.whugis20200262
中图分类号：
学科分类号：
摘要：
Objectives: The mountain excavation and city construction in Yan'an New District is one of the largest land-creation projects in the Loess Plateau. Large-scale mountain excavation has induced extensive land uplift in the region. At the same time, the excavation area is the main site for the urbanization of the new district, and the land uplift has seriously affected the sustainable development of urbanization in the new district. Methods: In this study, the small baseline subset synthetic aperture radar interferometry (SBAS-InSAR) technology was utilized to process the ascending Sentinel-1A data stacks covering the new district from May 2016 to October 2019 to retrieve long-term ground deformation information after construction. The spatial pattern of ground uplift and its time deformation evolution characteristics was revealed, and the causes of land uplift were further quantitatively analyzed in detail. Results: The results show that significant land uplift of the new district after construction is mainly distributed in the excavation area that has the greatest impact on human engineering activities, with a maximum uplift rate of 24.8 mm/a. The ground lifting deformation develops rapidly in the early post-construction period, and it tends to slow down and stabilize over time. Conclusions: The unloading rebound deformation caused by the rapid mountain excavation is the main internal factor causing land uplifting, and the distribution and magnitude of the land uplifting are the result of the combined effects of external factors such as excavation engineering, excavation thickness, and building load. © 2021, Editorial Board of Geomatics and Information Science of Wuhan University. All right reserved.
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页码：983 / 993
页数：10
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