Citation: | LI Zhuang, LI Bin, GAO Yang, WANG Meng, ZHAO Chaoying, LIU Xiaojie. Remote sensing interpretation of development characteristics of high-position geological hazards in Sedongpu gully, downstream of Yarlung Zangbo River[J]. The Chinese Journal of Geological Hazard and Control, 2021, 32(3): 33-41. doi: 10.16031/j.cnki.issn.1003-8035.2021.03-05 |
Sedongpu gully is a branch gully on the left bank of the lower reaches of the Yarlung Zangbo River. It is located below the galabaire peak. It often accumulates abundant moraines and loose deposits every year. Affected by temperature, rainfall and earthquake, high-position geological disasters have occurred many times and caused the blockage of the Yarlung Zangbo River. Through field investigation, combined with Landsat and other multi-source and multi-phase remote sensing images and InSAR radar data, the development characteristics of high-position geological disasters in Sedongpu gully are analyzed, and the existing deformation bodies are interpreted and analyzed: There are many glaciers, collapses, landslides and ice lakes in sedongpu gully; In the past 20 years since 2001, there have been five high-position geological disasters blocking the mainstream of the Yarlung Zangbo River; There are 3 identified deformations and 2 suspected deformations in the upper part of the gully; According to the two high-position geological disasters occurred in 2018 in Sedongpu gully, it is considered that the provenance comes from one high-position rock avalanche area and three high-position ice avalanche areas. This paper provides preliminary data for the further study of high-position geological disasters in Sedongpu gully, and provides effective scientific ideas for the study of similar geological disasters.
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Remote sensing interpretation of geological hazards in Sedongpu gully
Interpretation of high-position ice avalanche and rock avalanche blocking the river in Sedongpu gully from 2001 to 2020
Accumulated deformation of Sedongpu gully from June 15, 2016 to March 7, 2018
Radar line of sight deformation in sedongpu gully from August 2020 to September 2020
Interpretation of high-position ice avalanche and rock avalanche in Sedongpu gully in 2018
High-position chain geological hazard profile of Sedongpu gully
Comparison of pre and post slide images in high-position ice avalanche area III
Comparison of pre and post slide images in high-position rockfall area I
Comparison of pre and post slide images in high-position ice avalanche area I
Comparison of pre and post slide images in high-position ice avalanche area II