Estimating slope stability by the root reinforcement mechanism of Artemisia sacrorum on the Loess Plateau of China

Su, Xuemeng; Zhou, Zhengchao; Liu, June; Cao, Liguo; Liu, Junyang; Wang, Peipei

doi:10.1016/j.ecolmodel.2021.109473

Cited by 27 publications

(17 citation statements)

References 26 publications

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“…Root indexes such as root number, root distribution depth, root surface area and root volume are important factors affecting soil shear strength [33]. In this study, the roots of the two plants were mainly distributed in the shallow soil layer less than 10 cm.…”

Section: Root Morphology and Soil Depthmentioning

confidence: 70%

“…Root indexes such as root number, root distribution depth, root surface are root volume are important factors affecting soil shear strength [33]. this stud roots of the two plants were mainly distributed in the shallow soil layer less than There was no significant difference in the number of roots in the shallow soil la 0-10 cm, and the number of roots in the upper soil layer was more than that in the soil layer.…”

Section: Root Morphology and Soil Depthmentioning

confidence: 79%

“…Therefore, the primary roots and lateral roots were measured for Kochia scoparia, while only the primary roots were measured for Artemisia sacrorum. After the measurement of root diameter and root length in each layer, the root indexes, including root cross-sectional area s, root surface area S, root volume V and root area ration (RAR) in each layer were calculated using the following equations [18,33]:…”

Section: Root Morphological Investigationmentioning

confidence: 99%

“…The Wu-Waldron model is widely used to evaluate the root cohesion of plants [9,35]. The root cohesion (Cr) in root-soil composites is calculated by the formula [33]:…”

Section: Root Cohesion Evaluationmentioning

confidence: 99%

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Root Distribution and Root Cohesion of Two Herbaceous Plants in the Loess Plateau of China

et al. 2022

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In order to understand the root morphology distribution and mechanical properties of typical herbaceous plants, and to evaluate the ability of soil reinforcement by the plant roots, root morphology investigation, single root tensile test in laboratory and root cohesion evaluation by the Wu-Waldron model were carried out on two local representative herbaceous plants, Kochia scoparia (L.) Schrad and Artemisia sacrorum Ledeb. in the Loess Plateau of China. The results showed that the root morphological indexes (root number, single root diameter, root cross-sectional area, root surface area, root volume and root area ratio) of the two herbaceous plants decreased with the increase in soil depth, and the ratio of root to shallow soil layer was the highest in the 0–10 cm soil layer. The efficiency of root reinforcement could be higher in the shallow soil layer less than 10 cm. A positive correlation was observed between the root tensile force and root diameter in power function or exponential function, and a negative correlation was observed between the root tensile strength and root diameter in power function. The root cohesion of Kochia scoparia (2.73 kPa, or 0.92 kPa–1.37 kPa) was greater than that of Artemisia sacrorum (1.60 kPa, or 0.54 kPa–0.8 kPa), which could be used as the preferred herbaceous plant species for soil erosion control. The results could provide a scientific basis for selecting dominant species in the fields of ecological slope protection and soil and water conservation plant engineering in the loess area.

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Section: Root Morphology and Soil Depthmentioning

confidence: 70%

Section: Root Morphology and Soil Depthmentioning

confidence: 79%

Section: Root Morphological Investigationmentioning

confidence: 99%

“…The Wu-Waldron model is widely used to evaluate the root cohesion of plants [9,35]. The root cohesion (Cr) in root-soil composites is calculated by the formula [33]:…”

Section: Root Cohesion Evaluationmentioning

confidence: 99%

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Root Distribution and Root Cohesion of Two Herbaceous Plants in the Loess Plateau of China

et al. 2022

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“…However, the numerical analysis in this study was conducted based on a simplified and hypothetical slope. Su, et al [45] investigated spatial variance in the distributions of roots and mechanical characteristics of Artemisia sacrorum for root reinforcement on the Loess Plateau of China. Lobmann, et al [46] critically reviewed the slope stabilization potential of herbaceous vegetation as compared to woody vegetation and summarized the status of slope stabilization with herbaceous vegetation.…”

Section: Introductionmentioning

confidence: 99%

Stability Reinforcement of Slopes Using Vegetation Considering the Existence of Soft Rock

Liu¹,

Bi²,

Wang³

et al. 2021

Applied Sciences

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This study investigates the effectiveness of vegetation reinforcement on the stability of a slope with red-bed soft rock in a slope along the Xining-Chengdu railway, China. Four kinds of vegetation were considered to reinforce the soil and the slope. The rooted soil parameters were determined based on the laboratory tests. A numerical model was developed based on the actual geometry and soil layer distributions. The soils were modeled as elastic perfectly plastic materials and the vegetation reinforcement was represented as addition cohesion of a series of subsoil layers within a given depth. The effectiveness of vegetation on slope reinforcement under both dry and rainfall conditions was investigated regarding this case. The potential failure surface and corresponding factor of safety of the red-bed soft rock slope for those different conditions were analyzed and compared. It has been found that the addition of vegetation increased the safety of slope stability whether the slope is under a dry condition or a rainfall condition, while the increasing proportion of factor of safety due to vegetation reinforcement for this case is very limited. The results and findings in this study are still significant for the practitioner to evaluate the reasonability of vegetation reinforcement.

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Mixed Grass Species Enhances Root Production and Plant–Soil Reinforcement

Wang,

Gu,

Liu

2024

Land Degrad Dev

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Vegetation is a widely used eco‐friendly approach for slope reinforcement and ecological restoration. As a potential planting strategy, mixed planting of plants is often recommended to improve biodiversity, but the effects of mixed planting on soil reinforcement and slope stability are not yet clear. To address this issue, a study on two typical herbaceous slope protection plants, Chrysopogon zizanioides and Cynodon dactylon, were conducted. The biomechanical characteristics of different herbaceous plants were analyzed, and their root distribution and soil reinforcement performance under single and mixed planting were explored. Results show that mixed planting could significantly increase the number and root area ratio of root systems. At 0.1 cm depth after 42 days, the root number under mixed planting increased by 111.42% compared to vetiver grass monoculture and by 19.57% compared to bermuda grass monoculture. Mixed planting can provide stronger soil reinforcement by increasing apparent cohesion, with a maximum increase in apparent cohesion of 47.9%. The results of slope stability analysis showed that vegetation mainly relied on mechanical reinforcement in the root zone and hydrological reinforcement outside the root zone. After 42 days of growth, mixed planting at 0.1 m depth increased slope stability by 11.94% compared to vetiver grass monoculture and by 27.12% compared to bermuda grass monoculture, with both mechanical and hydrological effects of vegetation significantly enhanced. These findings suggest that mixed planting can promote plant development and growth, improve root production, and enhance plant–soil reinforcement and slope stability during the early establishment of vegetation. Therefore, in formulating slope reinforcement and ecological restoration strategies, more consideration can be given to mixed planting of plants, maximizing the utilization of competition characteristics between plants, and reducing the risk of shallow landslides while improving biodiversity.

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Estimating slope stability by the root reinforcement mechanism of Artemisia sacrorum on the Loess Plateau of China

Cited by 27 publications

References 26 publications

Root Distribution and Root Cohesion of Two Herbaceous Plants in the Loess Plateau of China

Root Distribution and Root Cohesion of Two Herbaceous Plants in the Loess Plateau of China

Stability Reinforcement of Slopes Using Vegetation Considering the Existence of Soft Rock

Mixed Grass Species Enhances Root Production and Plant–Soil Reinforcement

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