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基于 InSAR 技术的尼泊尔辛杜帕尔乔克区 震后滑坡监测与分析.
- Source :
-
Geomatics & Information Science of Wuhan University . Oct2023, Vol. 48 Issue 10, p1684-1696. 13p. - Publication Year :
- 2023
-
Abstract
- Objectives: In 2015, the Mw 7.8 earthquake in Nepal caused landslides and seriously impacted Nepal and its surrounding areas. Methods: In this paper, the Sindhupalchowk area, which is close to the epicenter of the earthquake, is selected as the study area. First, based on the L-band ALOS-2 and C-band Sentinel-1A synthetic aperture radar data, the detection and identification of post-earthquake landslides are carried out by using stacking-InSAR(interferometric synthetic aperture radar) technology. Second, the two-dimensional time series deformation characteristics of a typical landslide are obtained by combining the ascending and descending orbit data and multi-dimensional small baseline subset-InSAR technology. Results: Combined with optical images, 14 hidden points of landslide are delineated. The main deformation of the typical landslide occurs in the horizontal east-west direction, and the maximum deformation rate is −69 mm/a. Conclusions: By analyzing the trend and periodic term deformation signals in time series of the typical landslide, it is found that the earthquake has a significant acceleration effect on the landslide movement, and the increase of rainfall makes the landslide displacement show a periodic change from August to November every year. This paper can provide a reference for post-earthquake landslide monitoring re⁃ search. [ABSTRACT FROM AUTHOR]
Details
- Language :
- Chinese
- ISSN :
- 16718860
- Volume :
- 48
- Issue :
- 10
- Database :
- Academic Search Index
- Journal :
- Geomatics & Information Science of Wuhan University
- Publication Type :
- Academic Journal
- Accession number :
- 173164946
- Full Text :
- https://doi.org/10.13203/j.whugis20230258