Analyzing the role of soil water retention curve in slope stability for differently structured soils

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Abstract

 We analyzed the mechanical and hydrological effects of soil water retention curve (SWRC) models on the slope stability analyses of soils with unimodal and bimodal behavior.  We used three different SWRC models, two bimodal models (Ross&Smettem and Dexter) vs. the traditional van Genuchten model, to evaluate the Factor of Safety (FS) of a simple designed hillslope, based on the Bishop approach for unsaturated soils. Two formulations for term were also considered.  Results indicate that in cases of clayey soils, changes in FS obtained with different SWRC models especially at soil moisture values within the residual zone. In sandy soils the choice of formulations can be more important. The variation decreases as the slope conditions get worse, i.e. slope angle increases or friction angle decreases
Original languageEnglish
Publication statusPublished - 2016

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water retention
slope stability
soil water
soil
safety
slope angle
hillslope
sandy soil
moisture

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@conference{ff501a629d6e486783cb85ce23897891,
title = "Analyzing the role of soil water retention curve in slope stability for differently structured soils",
abstract = " We analyzed the mechanical and hydrological effects of soil water retention curve (SWRC) models on the slope stability analyses of soils with unimodal and bimodal behavior.  We used three different SWRC models, two bimodal models (Ross&Smettem and Dexter) vs. the traditional van Genuchten model, to evaluate the Factor of Safety (FS) of a simple designed hillslope, based on the Bishop approach for unsaturated soils. Two formulations for term were also considered.  Results indicate that in cases of clayey soils, changes in FS obtained with different SWRC models especially at soil moisture values within the residual zone. In sandy soils the choice of formulations can be more important. The variation decreases as the slope conditions get worse, i.e. slope angle increases or friction angle decreases",
author = "Elisa Arnone and Chiara Antinoro and Leonardo Noto",
year = "2016",
language = "English",

}

TY - CONF

T1 - Analyzing the role of soil water retention curve in slope stability for differently structured soils

AU - Arnone, Elisa

AU - Antinoro, Chiara

AU - Noto, Leonardo

PY - 2016

Y1 - 2016

N2 -  We analyzed the mechanical and hydrological effects of soil water retention curve (SWRC) models on the slope stability analyses of soils with unimodal and bimodal behavior.  We used three different SWRC models, two bimodal models (Ross&Smettem and Dexter) vs. the traditional van Genuchten model, to evaluate the Factor of Safety (FS) of a simple designed hillslope, based on the Bishop approach for unsaturated soils. Two formulations for term were also considered.  Results indicate that in cases of clayey soils, changes in FS obtained with different SWRC models especially at soil moisture values within the residual zone. In sandy soils the choice of formulations can be more important. The variation decreases as the slope conditions get worse, i.e. slope angle increases or friction angle decreases

AB -  We analyzed the mechanical and hydrological effects of soil water retention curve (SWRC) models on the slope stability analyses of soils with unimodal and bimodal behavior.  We used three different SWRC models, two bimodal models (Ross&Smettem and Dexter) vs. the traditional van Genuchten model, to evaluate the Factor of Safety (FS) of a simple designed hillslope, based on the Bishop approach for unsaturated soils. Two formulations for term were also considered.  Results indicate that in cases of clayey soils, changes in FS obtained with different SWRC models especially at soil moisture values within the residual zone. In sandy soils the choice of formulations can be more important. The variation decreases as the slope conditions get worse, i.e. slope angle increases or friction angle decreases

UR - http://hdl.handle.net/10447/221571

M3 - Paper

ER -