The boundary zones of compressive orogenic belts are particularly susceptible to active landslides due to high topographic relief and intense erosion.The Nurek section of Vakhsh River,located on the western margin of ...The boundary zones of compressive orogenic belts are particularly susceptible to active landslides due to high topographic relief and intense erosion.The Nurek section of Vakhsh River,located on the western margin of the Pamir orogenic belt,is characterized by complex terrain and severe water erosion.Therefore,the identification and interpretation of potential landslides are significant for regional hazard risk assessment.This study uses Interferometric Synthetic Aperture Radar(InSAR)data and the Small Baseline Subset(SBAS)method to evaluate the potential landslides from October 2017 to December 2023 in this river section,which is prone to frequent landslide occurrences.The results show that six potential landslides were identified,mainly concentrated on the west bank of the river,only one exhibited an annual line of sight(LOS)deformation rate exceeding 50 mm/year.Two-dimensional deformation analysis indicates a strong association with terrain relief,influenced by rainfall and soil conditions.Numerical simulations of mass movement indicate a low likelihood of the landslide transitioning into rapid or full-scale failures under experimental conditions.This study provides a timely riverbank landslide evaluation workflow using InSAR and numerical modeling,which can be widely applied to other steep riverbanks in Central Asia where in-situ monitoring is insufficient.展开更多
基金supported by Natural Science Foundation of Hunan Province(2024JJ3031)Hunan Provincial Transportation Science and Technology Progress and Innovation Plan Project(202211)+4 种基金National Natural Science Foundation of China(42174023,42304037)the Frontier Cross Research Project of Central South University(2023QYJC006)the Science and Technology Innovation Program of Fujian Province(No.2021Y3001)the Science and Technology Innovation Program of Hunan Province(No.2023SK2012)the Alliance of International Science Organizations(ANSO)Project(Grant No.ANSO CR PP 202204)。
文摘The boundary zones of compressive orogenic belts are particularly susceptible to active landslides due to high topographic relief and intense erosion.The Nurek section of Vakhsh River,located on the western margin of the Pamir orogenic belt,is characterized by complex terrain and severe water erosion.Therefore,the identification and interpretation of potential landslides are significant for regional hazard risk assessment.This study uses Interferometric Synthetic Aperture Radar(InSAR)data and the Small Baseline Subset(SBAS)method to evaluate the potential landslides from October 2017 to December 2023 in this river section,which is prone to frequent landslide occurrences.The results show that six potential landslides were identified,mainly concentrated on the west bank of the river,only one exhibited an annual line of sight(LOS)deformation rate exceeding 50 mm/year.Two-dimensional deformation analysis indicates a strong association with terrain relief,influenced by rainfall and soil conditions.Numerical simulations of mass movement indicate a low likelihood of the landslide transitioning into rapid or full-scale failures under experimental conditions.This study provides a timely riverbank landslide evaluation workflow using InSAR and numerical modeling,which can be widely applied to other steep riverbanks in Central Asia where in-situ monitoring is insufficient.
