A simple approach for estimating contribution of vetiver roots in shear strength of a soil–root system

Badhon, Faria Fahim; Islam, Mohammad Shariful; Islam, Md. Azijul; Arif, Md. Zia Uddin

doi:10.1007/s41062-021-00469-1

Cited by 25 publications

(6 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Plant roots are a crucial component impacting the physicochemical qualities of soil. The root system can influence the aeration of adjacent soils, soil bulk density, nutrient distribution and water content [46][47][48][49], soil microstructure at the root-soil interface, and soil shear strength through morphology, architecture, and root exudates [50]. Moreover, the soil affects the root architecture, distribution, biomass, etc., which in turn affects the anchorage of the root system.…”

Section: Soil Physicochemical Propertiesmentioning

confidence: 99%

Influence of Super Absorbent Polymer on Root Characteristics and Anchorage of Amorpha fruticosa on Rocky Slope

2022

View full text Add to dashboard Cite

Super absorbent polymer (SAP), known as a water retention agent, has a high capacity for water absorption, which can help enhance the soil structure. This paper studied the effects of SAP dosages on the root characteristics and anchorage of Amorpha fruticosa on rock slopes. The internal relationship between root growth effect and soil was discussed, and a specific reference was provided for the rational application of SAP on slopes. Using the pull-out and tensile resistance tests, we systematically studied the changes of soil properties, root distribution, root tensile strength, and root anchorage under six different SAP dosages. The results indicated that: (1) With the increase in SAP dosage, the natural soil water content and water content after 24 h of watering increased significantly, whereas the contents of TN, TP, and TK decreased dramatically. (2) With the increase in SAP dosage, the amount and length of first-order and secondary lateral roots decreased significantly, and there was no significant difference in diameter. The amount of downslope first-order and unembedded secondary lateral roots is greater than upslope. The amount of upslope embedded secondary lateral roots is greater than in downslope. (3) Tensile strength: embedded secondary root > non-embedded secondary root > first-order lateral root; upslope root > downslope root. (4) With the increase in SAP dosage, the plant anchorage drops noticeably. This study concluded that the significant addition of SAP could enhance the tensile strength of upslope embedded secondary lateral roots but would adversely affect soil nutrients, root distribution, and root anchorage. The addition of SAP in this test had no significant effect on improving slope stability. From the perspective of reinforcement capacity, we cannot blindly pursue the survival rate and other high dosage use of water retention agents to increase the risk of slope destabilization.

show abstract

Section: Soil Physicochemical Propertiesmentioning

confidence: 99%

Influence of Super Absorbent Polymer on Root Characteristics and Anchorage of Amorpha fruticosa on Rocky Slope

2022

View full text Add to dashboard Cite

show abstract

“…Therefore, new affordable and sustainable technology should be explored to stabilize the slopes. One of the sustainable solutions for landslide disasters is the bioengineering technique using vegetation [41][42][43]. The inclusion of vegetation in slopes increases the shear strength of soil, which eventually increases the factor of safety and reduces the erosion potential [44,45].…”

Section: Remedial Measures For Landslide Preventionmentioning

confidence: 99%

A Geotechnical Investigation of 2017 Chattogram Landslides

Islam

Jeet

2021

Geosciences

Self Cite

View full text Add to dashboard Cite

In this study, an attempt is made to uncover and discuss the geo-environmental characteristics, triggers, and consequences of a landslide disaster in the Chattogram Hill Tracts (CHT) region of Bangladesh. The hilly areas are composed of Tertiary and Quaternary sediments which have been folded, faulted, uplifted and, then deeply dissected by rivers and other water bodies. This paper presents a case study on the geotechnical investigation and numerical modeling of the landslides of 13 June 2017. A field visit and soil sample collection, followed by laboratory testing were conducted at the landslide-afflicted areas. The study revealed that the soil type was an important factor behind landslides, while high precipitation, hill cutting, deforestation, and unplanned human settlements act as contributing factors behind the landslide disaster. Extensive analysis of the geotechnical facts has been carried out, and an attempt is made to pinpoint the cause. A finite element modeling was conducted using PLAXIS 2D to investigate the failure mechanism. The numerical modeling results have suggested that most of the hill slopes were susceptible to failure after heavy rainfall. A conclusion is drawn that the landslides were triggered by incessant rainfall infiltrating into the subsoil, which led to a notable increase in its degree of saturation and a simultaneous reduction in suction and shear strength of the soil.

show abstract

“…Vetiver root penetration can increase the safety factor in terraced slopes [17]. Shear strength tests in the laboratory on soil samples with vetiver grass roots decreased with increasing water content-however, higher root length results in higher shear strength [18]. On sandy silt soils, vetiver grass reduces erosion by 94% -97%, and soil erosion rates are reduced by up to 95%.…”

Section: Introductionmentioning

confidence: 99%

Influence of Grassroots on the Stability of Slopes: Experimental Modelling and Numerical Analysis

Sinarta

2024

GEOMATE

View full text Add to dashboard Cite

Debris flow disasters were caused by surface erosion with high rainfall, especially in mountain villages on the island of Bali. This research aims to understand the stability behavior of volcanic soil due to physical and mechanical conditions based on numerical analysis with Plaxis 3D software. The experiment was used by planting in a test box in the form of a steel frame and equipped with a rainfall simulator to determine slope stability due to planting a combination of elephant grass and vetiver. Numerical results for volcanic soil conditions without vegetation show a soil tension of 0.6854 kN/m 2 . Model results after four days, there was a decrease of 0.0001m, and after 33 days there was a decrease of 0.0000064 m for the slope 45°. The safety factor of slopes without vegetation is 0.8, so this condition has the threat of landslides and surface erosion. Experimental results show that adding elephant grass combined with vetiver grass can reduce erosion by 94.6% on slope 45 o and 92.67% on slope 60 o . The effectiveness of the resulting runoff reaches 55.48% on slope 45 o and 53.89% on slope 60 o . This increase in effectiveness was caused by the development of elephant grassroots, which spread horizontally, thereby increasing the bond with the top layer of soil.

show abstract

A simple approach for estimating contribution of vetiver roots in shear strength of a soil–root system

Cited by 25 publications

References 13 publications

Influence of Super Absorbent Polymer on Root Characteristics and Anchorage of Amorpha fruticosa on Rocky Slope

Influence of Super Absorbent Polymer on Root Characteristics and Anchorage of Amorpha fruticosa on Rocky Slope

A Geotechnical Investigation of 2017 Chattogram Landslides

Influence of Grassroots on the Stability of Slopes: Experimental Modelling and Numerical Analysis

Contact Info

Product

Resources

About