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Hydro-mechanical effects of vegetation on slope stability: A review.
Lann, Tongsan; Bao, Han; Lan, Hengxing; Zheng, Han; Yan, Changgen; Peng, Jianbing.
Afiliação
  • Lann T; School of Highway, Chang'an University, Xi'an, Shaanxi 710064, China.
  • Bao H; School of Highway, Chang'an University, Xi'an, Shaanxi 710064, China; State Key Laboratory of Loess Science (in preparation), Xi'an 710054, China; Xi'an Key Laboratory of Geotechnical Engineering for Green and Intelligent Transport, China. Electronic address: baohan@chd.edu.cn.
  • Lan H; State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; School of Geological Engineering and Geomatics, Chang'an University, Xi'an, Shaanxi 710064, China. Electronic a
  • Zheng H; Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region of Ministry of Education, School of Environmental Science and Engineering, Chang'an University, Xi'an 710054, China; State Key Laboratory of Loess Science (in preparation), Xi'an 710054, China. Electronic address: zhenghan@c
  • Yan C; School of Highway, Chang'an University, Xi'an, Shaanxi 710064, China; Xi'an Key Laboratory of Geotechnical Engineering for Green and Intelligent Transport, China. Electronic address: ycg@chd.edu.cn.
  • Peng J; School of Geological Engineering and Geomatics, Chang'an University, Xi'an, Shaanxi 710064, China; State Key Laboratory of Loess Science (in preparation), Xi'an 710054, China. Electronic address: dicexy_1@chd.edu.cn.
Sci Total Environ ; 926: 171691, 2024 May 20.
Article em En | MEDLINE | ID: mdl-38485024
ABSTRACT
This study explores the complex interplay between vegetation and soil stability on slopes to enhance soil-bioengineering and slope stabilization techniques. We assess the multifaceted role of vegetation in soil stabilization, examining processes such as canopy interception, stemflow, and the effects of hydrological and mechanical changes induced by root systems and above-ground plant structures. Key underlying mechanisms and their effects on stability are reported, along with the evaluation of significant plant indicators from historical research. Our review revealed that plant coverage and root architecture are critical in reducing soil erosion, with plant roots increasing soil cohesion and reducing soil detachability. Above-ground vegetation provides a protective layer that decreases the kinetic energy of raindrops and allows for higher infiltration. The importance of species-specific root traits is emphasized as pragmatic determinants of erosion prevention. Additionally, the effects of root reinforcement on shallow landslides are dissected to highlight their dualistic nature. While root-soil interactions typically increase soil shear strength and enhance slope stability, it is crucial to discriminate among vegetation types such as trees, shrubs, and grasses due to their distinct root morphology, tensile strength, root area ratio, and depth. These differences critically affect their impact on slope stability, where, for instance, robust shrub roots may fortify soil to greater depths, whereas grass roots contribute significantly to topsoil shear strength. Grasses and herbaceous plants effectively controlled surface erosion, whereas shrubs mainly controlled shallow landslides. Therefore, it is vital to conduct a study that combines shrubs with grasses or herbaceous plants. Both above-ground and below-ground plant indicators, including root and shoot indicators, were crucial for improving slope stability. To accurately evaluate the impact of plant species on slope stability reinforcement, it is necessary to study the combination of hydro-mechanical coupling with both ground plant indicators under specific conditions.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Plantas / Árvores Idioma: En Ano de publicação: 2024 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Plantas / Árvores Idioma: En Ano de publicação: 2024 Tipo de documento: Article