|Table of Contents|

Characteristics of Deformation of Landslide and Ground Fissure in Gongjue Area of Jinsha River Basin, China Based on DS-InSAR Technology(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2022年第05期
Page:
814-825
Research Field:
大地测量、遥感与地学大数据
Publishing date:

Info

Title:
Characteristics of Deformation of Landslide and Ground Fissure in Gongjue Area of Jinsha River Basin, China Based on DS-InSAR Technology
Author(s):
SHENG Lei1; 2;  ZHANG Lu3;  DU Yu-ling1; 2;  DENG Wen-jie1; 2;  YAN Shi-yong1; 2*
(1. Key Laboratory of Land Environment and Disaster Monitoring of Ministry of Nature Resources, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China; 2. School of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China; 3. Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China)
Keywords:
landslide;  ground fissure;  geological hazard;  DS-InSAR technology;  distributed scatterer;  GACOS;  Jinsha River Basin
PACS:
P237
DOI:
10.19814/j.jese.2022.01013
Abstract:
The Gongjue area in Jinsha River Basin is located in the mountainous region, SW China, with the development of geological hazards such as landslides and ground fissures, which bring the serious threat to the lives and properties of people along the route, and the construction and safe operation of infrastructure such as transportation. Thus, there is an urgent need to conduct a wide-area monitoring and analysis of the recent development characteristics of landslides and ground fissures in the area. The DS-InSAR technology with both high-coherence points and distributed targets is employed to obtain the high-precision spatial distribution information of surface in the LOS direction with 64 scenes in ascending orbit and 69 scenes in descending orbit of Sentinel-1 image, which are acquired from February 2019 to July 2021. 22 obvious geological hazards are detected, and the maximum deformation rate of -254 mm·a-1 along the LOS direction is observed on the landslide near Shadong town. And then, the spatial and temporal characteristics of typical landslides and ground fissure deformation in the area were also analyzed based on the deformation along its steepest slope direction and precipitation data. The results indicate that landslide deformation is seriously affected by complex topography, and ground fissure deformation yields a good spatial correlation with its strike direction, and precipitation aggravates the activity of some geological hazards.

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Last Update: 2022-10-01