Abstract:We detect and identify large-scale geohazards in Nyalam to Zhangmu section of China-Nepal highway based on StaMPS-SBAS InSAR method using 130 ascending and descending orbit images of Sentinel-1A satellite from 2017-04 to 2019-06, combined with GACOS atmospheric correction. The results show that there are 54 hidden danger points in the study area, forming multiple landslide groups, with a maximum deformation rate of 114 mm/a for ascending orbit and 122 mm/a for descending orbit. According to precipitation data, there are 35 hidden danger points where deformation is related to precipitation, and the seasonal characteristics of deformation are obvious. The research results can help to understand trends and causes of surface deformation in this section, enrich the historical records of geohazard points, and provide reference for continuous monitoring of geohazard in the region.
YU Bing,CAI Rui,ZHANG Chonglei et al. Identification and Feature Analysis of Regional Geohazard Risks along Nyalam to Zhangmu Section of China-Nepal Highway by InSAR[J]. jgg, 2024, 44(7): 709-717.