Estimation of Shallow Landslide Susceptibility Incorporating the Impacts of Vegetation on Slope Stability

作     者：Hu Jiang Qiang Zou Bin Zhou Yao Jiang Junfang Cui Hongkun Yao Wentao Zhou Hu Jiang;Qiang Zou;Bin Zhou;Yao Jiang;Junfang Cui;Hongkun Yao;Wentao Zhou

作者机构：Key Laboratory of Mountain Hazards and Earth Surface ProcessInstitute of Mountain Hazards and Environment(IMHE)Chinese Academy of Sciences(CAS)Chengdu 610041China China-Pakistan Joint Research Center on Earth SciencesIslamabad 45320Pakistan University of Chinese Academy of SciencesBeijing 100049China 

出 版 物：《International Journal of Disaster Risk Science》 (国际灾害风险科学学报（英文版）)

年 卷 期：2023年第14卷第4期

页      面：618-635页

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 0708[理学-地球物理学] 0815[工学-水利工程] 0706[理学-大气科学] 

基　　金：supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDA23090303) the National Natural Science Foundation of China(Grant No.42171085) the Light of West China Program of the Chinese Academy of Sciences(Grant No.xbzg-zdsys-202104) the Key R&D Project of Sichuan Provincial Department of Science and Technology(Grant No.2023YFS0434). 

主　　题：Physical-based model Qinghai-Tibet Plateau Shallow landslide Susceptibility analysis Vegetation effect 

摘      要：This study aimed to develop a physical-based approach for predicting the spatial likelihood of shallow landslides at the regional scale in a transition zone with extreme topography.Shallow landslide susceptibility study in an area with diverse vegetation types as well as distinctive geographic factors(such as steep terrain,fractured rocks,and joints)that dominate the occurrence of shallow landslides is challenging.This article presents a novel methodology for comprehensively assessing shallow landslide susceptibility,taking into account both the positive and negative impacts of plants.This includes considering the positive efects of vegetation canopy interception and plant root reinforcement,as well as the negative efects of plant gravity loading and preferential fow of root systems.This approach was applied to simulate the regional-scale shallow landslide susceptibility in the Dadu River Basin,a transition zone with rapidly changing terrain,uplifting from the Sichuan Plain to the Qinghai–Tibet Plateau.The research fndings suggest that:(1)The proposed methodology is efective and capable of assessing shallow landslide susceptibility in the study area;(2)the proposed model performs better than the traditional pseudo-static analysis method(TPSA)model,with 9.93%higher accuracy and 5.59%higher area under the curve;and(3)when the ratio of vegetation weight loads to unstable soil mass weight is high,an increase in vegetation biomass tends to be advantageous for slope stability.The study also mapped the spatial distribution of shallow landslide susceptibility in the study area,which can be used in disaster prevention,mitigation,and risk management.