A Mathematical Model for Shear Strength Prediction of Vetiver Rooted Soil

Islam, Mohammad Shariful; Badhon, Faria Fahim

doi:10.1061/9780784482797.010

Cited by 21 publications

(7 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Under the same vetiver planting layout, the grass-covered silty-sand model resulted in 84% lower erosion and 62.5% lower runoff than the grass-covered model on sandy silt soils. Vetiver is more effective in reducing erosion and runoff for soils with a greater percentage of sand, and the soil type dominates the erosion process (Azis, 2022;Islam et al, 2016).…”

Section: Application Of Vetiver On Silty Sand Soil and Sandy Silt Soilmentioning

confidence: 99%

Exploring The Mechanism Of Vetiver System For Slope Reinforcement On Diverse Soil Types – A Review

Ciawi,

Hidayati,

Kedaton

et al. 2023

J. Geoscience Eng. Environ. Technol.

View full text Add to dashboard Cite

Landslide, one of the important geomorphological processes, is essentially a natural phenomenon that is often exacerbated by human-induced activities. A stable sloping terrain will tend to collapse when it is subjected to forces that tend to destabilise it. Slope instability is one of the main factors leading to disasters that might be catastrophic to the environment and human life. Since the beginning of the year 2000 only, thousands of fatalities annually occurred globally due to landslides. With its predominantly sloping topography, the landslide is also a frequent natural disaster in Indonesia. BNPB data stated that between 2013 and 2022, there were 7,297 recorded cases of landslides in the country with more than 100 casualties on one occasion. To mitigate the impact of this disaster, measures such as reinforcing slopes or implementing retaining walls in vulnerable areas are urgently required. In recent decades, bio-engineering techniques gain more attention in slope reinforcement by combining the mechanical and hydrological abilities of vegetation in erosion control and slope stabilisation. Vetiver grass is one of the vegetation species used in bioengineering techniques due to its low cost and more sustainable solutions in many infrastructure projects. In this paper, a qualitative literature review is conducted and processed using descriptive-analytical methods to address the mitigation of landslides and their potential domino effects on the economy and people's welfare.

show abstract

Section: Application Of Vetiver On Silty Sand Soil and Sandy Silt Soilmentioning

confidence: 99%

Exploring The Mechanism Of Vetiver System For Slope Reinforcement On Diverse Soil Types – A Review

Ciawi,

Hidayati,

Kedaton

et al. 2023

J. Geoscience Eng. Environ. Technol.

View full text Add to dashboard Cite

show abstract

“…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]. For shallow slope failures, this method has been proven to be effective, economical, and environment friendly [46].…”

Section: Remedial Measures For Landslide Preventionmentioning

confidence: 99%

A Geotechnical Investigation of 2017 Chattogram Landslides

Islam

Jeet

2021

Geosciences

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

“…Moreover, the Wu method, which is used to calculate root cohesion in various countries such as America (Machado et al 2015), Thailand (Jotisankasa et al 2015), and Spain (Mickovski and Beek 2009) at vetiver age 4-24 months, have a root cohesion of 0-1600 kPa. Root cohesion can also be obtained by adopting the characteristics and parameters of roots from previous studies and regression equation models such as the study in Bangladesh Islam and Badhon 2020), Thailand (Nguyen et al 2018), and Indonesia (Hamdhan et al 2020;Kurniawati and Wulandari 2020;Muntohar et al 2017).…”

Section: Introductionmentioning

confidence: 99%

“…Study on vetiver grass root cohesion has been carried out using vetiver grass roots that are naturally grown (Cazzuffi and Crippa 2005;Islam and Badhon 2020;Jotisankasa et al 2015;Hoque 2019) and which grow in well-managed areas D'Souza et al 2019;Nguyen et al 2018;Muntohar et al 2017), while research on vetiver grass-roots cohesion in planted landslide areas with different growth sites characteristics have not been widely carried out, while the effectiveness of roots in soil strengthening is influenced by soil conditions and climate (D'Souza et al 2019) as the growth sites characteristics. In Indonesia, studies related to vetiver grass root cohesion due to measuring the root tensile strength from landslide rehabilitation areas are still not available.…”

Section: Introductionmentioning

confidence: 99%

Vetiver root cohesion at different growth sites in Bogor, Indonesia

Fata

Hendrayanto²,

Erizal³

et al. 2022

Biodiversitas

View full text Add to dashboard Cite

Abstract. Fata YA, Hendrayanto, Erizal, Tarigan SD, Wibowo C. 2022. Vetiver root cohesion at different growth sites in Bogor, Indonesia. Biodiversitas 23: 1683-1692.The plant root system, including the root system of vetiver grass, plays a critical role in enhancing soil cohesion, shear strength, and vegetated slope stability. Numerous studies on mechanical reinforcement of vetiver grass-roots have been conducted, with the majority of studies focusing on ground-planted vetiver with good maintainedor naturally grown vetiver, while mechanical reinforcement of vetiver grass roots planted in landslide areas at various growth sites with less maintenance is still uncommon.The purpose of this study was to examine the vetiver grass-roots cohesion that grew in the different growth sites that had been affected by landslides. Vetiver grass root samples were collected in January 2021, at the age of 8 months. Vetiver grass roots were collected from vetiver plants growing in the affected landslide areas of (a) bareland, (b) shrubland, and (c) bushland. The root tensile strength of root samples was determined using a Universal Testing Machine (UTM) with a capacity of 3 tons, and the measurement accuracy of the load cell was 1/10000. The test was conducted in accordance with ASTM D638-14 guidelines. Three repetitions were performed on roots representing the root length class of 10 cm. The results indicated that the growth sites influenced the morphological and architectural properties of the vetiver grass-roots. The vetiver grass that grew in bushland exhibited a higher root density than bareland or shrubland. The roots were denser and had a greater range of lengths. Short roots less than 10 cm in length were the most prevalent, and the majority of them were found near the soil surface. The greater the soil depth, the less the quantity of roots.The tensile strength (TR) tends to get smaller with longer roots, and vetiver grass rootsgrew in bareland have the highestTR(15-59 MPa) relative to their growth in bushland (9-37 MPa) and shrubland (16-29 MPa). The ratio of root fiber area to root growth area (RAR) also tends to get smaller with deeper roots. Likewise, is the tensile strength increasing caused by roots (tR) and root cohesion (CR) which are a function of RAR. The CR??of vetiver roots growing in bushland (0.015-0.275 kPa) were relatively higher than those growing in bareland (0.02-0.168 kPa) and shrubland (0.002-0.028 kPa) in the same root length class, at the same depth.

show abstract

A Mathematical Model for Shear Strength Prediction of Vetiver Rooted Soil

Cited by 21 publications

References 8 publications

Exploring The Mechanism Of Vetiver System For Slope Reinforcement On Diverse Soil Types – A Review

Exploring The Mechanism Of Vetiver System For Slope Reinforcement On Diverse Soil Types – A Review

A Geotechnical Investigation of 2017 Chattogram Landslides

Vetiver root cohesion at different growth sites in Bogor, Indonesia

Contact Info

Product

Resources

About