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Landslide mapping and analysis along the China-Pakistan Karakoram Highway based on SBAS-InSAR detection in 2017

Journal of Mountain Science 2021年第10期18卷 2540-2564页

作者： SU Xiao-jun ZHANG Yi MENG Xing-min YUE Dong-xia MA Jin-hui GUO Fu-yun ZHOU Zi-qiang REHMAN Mohib Ur KHALID Zainab CHEN Guan ZENG Run-qiang ZHAO Fu-meng College of Earth and Environmental Sciences Lanzhou UniversityLanzhou 730000China School of Earth Sciences Lanzhou UniversityLanzhou 730000China Gansu Tech Innovation Centre for Environmental Geology and Geohazard Prevention Lanzhou 730000China Geological Environment Monitoring Institute of Gansu Province Lanzhou 730050China Institute of Geological Hazards Prevention Gansu Academy of SciencesLanzhou 730000China

The Karakoram Highway(KKH),a part of the China–Pakistan Economic Corridor(CPEC),is a major highway connecting northern Pakistan to *** inventorying and analysis of landslides along KKH are challenging because of poor accessibility,vast study area,limited availability of ground-based datasets,and the complexity of landslide processes in the *** order to preserve life,property,and infrastructure,and to enable the uninterrupted and efficient operation of the KKH,it is essential to strengthen measures for the prevention and control of geological *** the present study,SBASInSAR(Small Baseline Subsets-Interferometric Synthetic Aperture Radar)was used to process 150 scenes of Sentinel 1-A images in the year 2017 along the Karakoram Highway.A total of 762 landslides,including 57 complex landslides,126 rock falls,167 debris slides,and 412 unstable slopes,ranging in size between 0.0017 and 10.63 km2 were ***,this study also gains an inventory of 40 active glacier movements in this *** categorization,displacements characteristics,spatial distribution,and their relationship with various contributing factors have been successfully investigated along the entire KKH using image interpretation and frequency-area *** criteria adopted for landslides categorization is presented in the *** results showed that the 2-D ground deformation derived in Hunza valley echoes well with the general regional landslides *** spatial distribution analysis revealed that there are clumped distributions of landslides in the Gaizi,Tashkurgan,and Khunjerab in China,as well as in Hunza valley,and north of Chilas city in *** results indicated that these landslides mainly occur on south-facing slopes with a slope angle of 20°–45°and elevation relief of 550–2,100 *** development is also related to low vegetation cover and weathering effects in mountain ***,our study provides scientific data

关键词： Landslides mapping Slope deformation Identification Landslide development area development ratio SBAS-InSAR Karakoram Highway

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