Detection and Monitoring of Potential Landslides Along Minjiang River Valley in Maoxian County, Sichuan Using Radar Remote Sensing

被引：0
|
作者：
Li M. [1 ]
Zhang L. [2 ]
Dong J. [3 ]
Cai J. [2 ]
Liao M. [2 ]
机构：
[1] Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming
[2] State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan
[3] School of Remote Sensing and Information Engineering, Wuhan University, Wuhan
来源：
Wuhan Daxue Xuebao (Xinxi Kexue Ban)/Geomatics and Information Science of Wuhan University | 2021年 / 46卷 / 10期
基金：
中国国家自然科学基金;
关键词：
Deformation sensitivity; Detection of potential landslide hazard; Radar remote sensing; Sentinel‑1; Time⁃series InSAR technology;
D O I：
10.13203/j.whugis20210367
中图分类号：
学科分类号：
摘要：
Objectives: Affected by geological and topographic conditions as well as tectonic activities, landslide disasters in Maoxian County, Sichuan Province happen frequently and constitute a significant threat to the safety of human life and civil infrastructure. Therefore, it is necessary to identify and monitor potential landslide⁃prone areas effectively. Methods: We applied the time⁃series interferometric synthetic aperture radar (InSAR) analysis technique to process both ascending and descending Sentinel⁃1 data stacks from November 2014 to June 2017 to identify and monitor potential landslides in the valley along Minjiang River in Maoxian County. We conducted detailed and in⁃depth analyses of the critical areas identified. Meanwhile, we analyzed and discussed the sensitivity of InSAR line of sight (LOS) deformation measurements retrieved from SAR data stacks acquired in different orbits. Results: More than 20 potential landslide spots from Goukou Township to Shidaguan Township along the valley of Minjiang River in Maoxian County have been detected. The accuracy of deformation detection is validated by field survey. Conclusions: The results show that the time⁃series InSAR method can effectively identify and monitor landslide hazards in alpine and valley areas. We suggest that the difference in LOS deformation measurement sensitivity on different slopes should be considered when analyzing the deformation patterns. © 2021, Editorial Board of Geomatics and Information Science of Wuhan University. All right reserved.
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页码：1529 / 1537
页数：8
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