Regression Equations for Estimating Landslide-Triggering Factors Using Soil Characteristics

Kim, Kyeong-Su; Kim, Man-Il; Lee, Moon-Se; Hwang, Eui-Soon

doi:10.3390/app10103560

Cited by 9 publications

(3 citation statements)

References 44 publications

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“…Based on regression modeling, Su Kim et al (2020) determined the equations for shear strength and permeability coe cients, concluding that the permeability coe cient was associated with porosity ratio, effective grain size, and uniformity coe cient. Furthermore, shear strength is associated with the ratio of ne-grained soil, uniformity coe cient and degree of saturation, dry weight density, and porosity ratio.…”

Section: Resultsmentioning

confidence: 99%

Multivariate linear modeling of soil properties using soil formation factors

Pazhuhandeh,

Torkashvand,

Moeini

et al. 2023

Preprint

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Parent material, climate, topography, time, and living organisms all play a role in soil formation. This study aimed to investigate the relationship between these factors and soil physicochemical properties for rapid management of watersheds and Multivariate linear modeling of soil properties using soil formation factors. Four watersheds of Qazvin province were studied, namely Juyank, Madan, Niyarak, and Plangeh. First, the working unit map was prepared using a geographical information system (GIS) on a scale of 1:25000 based on photogeological investigations and field visits. Then, 101 soil samples were collected and EC, pH, organic matter percentage, sand fraction, silt proportion, and clay percentages were measured. The relationship between soil formation factors and properties was investigated using linear multivariate regression in three methods of Enter, Forward, and Stepwise. Therefore, the 5 soil-forming factors were the independent variables, and the soil's physical and chemical characteristics were set as the dependent variables. The accuracy of these models was validated using two statistics of explanation coefficient and mean squared error (RMSE). The results demonstrated that the highest R2 value of 0.78 with an RMSE of 0.56 was associated with the relationship between pH and soil-forming factors (regression by the Enter method). There was less than a 50% correlation between silt, clay, and electrical conductivity with soil-forming factors.

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Section: Resultsmentioning

confidence: 99%

Multivariate linear modeling of soil properties using soil formation factors

Pazhuhandeh,

Torkashvand,

Moeini

et al. 2023

Preprint

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“…Highland fields in the Republic of Korea are sandy weathered granite soils with weak cohesion [6] that lead to soil loss due to rainfall and nonpoint pollutant leakage which are serious issues during farming activities [4]. Furthermore, farmers frequently extract topsoil from mountainous areas adjacent to highland cropland in order to increase cultivated area and then divert it to their fields, resulting in accelerated soil loss [7].…”

Section: Introductionmentioning

confidence: 99%

Assessing the Suitability of Sediment Soil to Be Reused by Different Soil Treatments for Forest Agriculture

Song

Kim，Suk-Woo

Koo³

et al. 2023

Sustainability

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In order to determine the suitability of reusing the sediment deposited in the upper part of the dam as soil for growing forest products, a total of eight treatment plots were formed by mixing cultivated soil, compost, and biochar with the sediment in a volume ratio. Generally, the soil fertility of SS100 was relatively lower than that of CS, with Av. P2O5 being only 22%. SS70 and SS50 increased soil physicochemical properties including OM, exchangeable cations, CEC, and BS by 1.1–2.9 times more than SS100, thus, A. scaber Thunb. treated in SS70 and SS50 showed increased photosynthetic parameters including A, Vcmax, Jmax, and the growth characteristics, especially in the aboveground part, were 20% and 31% higher than the SS100, respectively. Furthermore, A. scaber in CS, SS50, Bc10, and Comp had higher PIabs, DFIabs, and SFIabs while maintaining lower VK/VJ after 10 days of drought stress, Comp and Bc10, in particular, had a high Y(NPQ) and a low Y(NO). Bc5 and Bc10, revealed no discernible differences in soil physicochemical properties, nonetheless, A. scaber in Bc10 demonstrated relatively high drought tolerance. Overall, CS, SS50, and Comp had relatively well-balanced plant growth, and drought tolerance was found to be higher in CS, Comp, SS50, and Bc10, which is thought to have higher water-holding capacity and soil fertility. As a result, if appropriate treatment methods are established, such as mixing sediment soil with cultivated soil at a one-to-one ratio or adding compost, increase the public value of forests by promoting activities such as watershed conservation, soil runoff prevention, and reducing the financial burden associated with sustainable forestry management and SS50 is recommended as the most cost-effective method.

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“…Rainfall infiltration reduces matric suction and thereby deteriorates unsaturated soil strength, and the safety factor of unsaturated soil slopes is subsequently decreased, which is one of the main causes to trigger slope instability in tropical and subtropical regions [1,2]. Numerous investigations have been undertaken to address the failure mechanism and stability of rainfall-induced landslides using field monitoring, model tests, and numerical modeling [3][4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Safety Factor of Unsaturated Soil Slopes considering the Intermediate Principal Stress Effect and Different Profiles of Matric Suction

Changguang

Zhao

et al. 2021

Mathematical Problems in Engineering

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Profiles of matric suction are critical for assessing the stability of unsaturated soil slopes, and the strength of unsaturated soils is affected by the intermediate principal stress. This study presents a theoretical formulation of safety factor for infinite unsaturated soil slopes under four different profiles of matric suction using the limit equilibrium method. The unified shear strength equation under plane strain conditions is adopted to capture the effect of intermediate principal stress on the strength of unsaturated soils. The proposed formulation of safety factor is found to have good comparability and broad applicability. The validity of the proposed formulation is demonstrated by comparing its predictions with the results of the extended shear strength method and the finite element method available in the literature. Parametric studies show that the effect of intermediate principal stress on the stability of unsaturated soil slopes is significant; the difference of safety factor among four suction profiles is pronounced, and the safety factor is highest for a linear suction profile. In addition, the safety factor changes with the infiltration depth in two stages, decreases with the slope angle, and increases with effective strength parameters. The results of this study are capable of providing beneficial guidance for optimization designs and disaster preventions of unsaturated soil slopes.

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Regression Equations for Estimating Landslide-Triggering Factors Using Soil Characteristics

Cited by 9 publications

References 44 publications

Multivariate linear modeling of soil properties using soil formation factors

Multivariate linear modeling of soil properties using soil formation factors

Assessing the Suitability of Sediment Soil to Be Reused by Different Soil Treatments for Forest Agriculture

Safety Factor of Unsaturated Soil Slopes considering the Intermediate Principal Stress Effect and Different Profiles of Matric Suction

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