Search results for "Hillslope instability"

showing 3 items of 3 documents

Modeling the hydrological and mechanical effect of roots on shallow landslides

2016

This study proposes a new methodology for estimating the additional shear strength (or cohesion) exerted by vegetation roots on slope stability analysis within a coupled hydrological-stability model. The mechanical root cohesion is estimated within a Fiber Bundle Model framework that allows for the evaluation of the root strength as a function of stress-strain relationships of populations of fibers. The use of such model requires the knowledge of the root architecture. A branching topology model based on Leonardo's rule is developed, providing an estimation of the amount of roots and the distribution of diameters with depth. The proposed methodology has been implemented into an existing dis…

Hillslope instabilityVegetation root cohesionRoot topological modelSettore ICAR/02 - Costruzioni Idrauliche E Marittime E IdrologiaShallow landslidesHillslope instability; Hydrological modeling; Root topological model; Shallow landslides; Vegetation root cohesion; Water Science and TechnologyShallow landslideHydrological modelingWater Science and Technology
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Modeling the hydrological and mechanical effect of roots in shallow landslide analysis

2015

The additional cohesion exercised by vegetation roots (cr) provides an important contribution to the slope stability. This study proposes a methodology for estimating the cr term in a hillslope landslide analysis within a coupled ecohydrological-stability model. The coupled model simulates the spatial distribution and temporal dynamics of the Factor of Safety (FS) as a function of soil moisture dynamics, by taking into account the hydrological effects of vegetation through the root water uptaking. The additional mechanical root cohesion is estimated in a Fiber Bundle Model framework that allows for the evaluation of the root strength as a function of stress-strain relationships of populatio…

hillslope instabilityvegetation root cohesionSettore ICAR/02 - Costruzioni Idrauliche E Marittime E Idrologiahillslope instability; vegetation root cohesion; hydrological modelling; physically-based modelshydrological modellingphysically-based models
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Hydrological and mechanical effects of roots in shallow landslide analysis: A physically-based approach

2015

This study provides the first insights of a methodology for estimating the additional cohesion exercised by vegetation roots in a hillslope landslide analysis within a coupled ecohydrological-stability model. The existing coupled system is able to simulate the spatial distribution and temporal dynamics of Factor of Safety (FS) as a function of soil moisture dynamics. The model takes into account the hydrological effects of vegetation which, through the root water uptaking, contributes in reducing the soil water content and, thus, in increasing the slope stability. The additional mechanical root cohesion is estimated in a Fiber Bundle Model (FBM) framework that allows for the evaluation of t…

hillslope instabilityvegetation root cohesionSettore ICAR/02 - Costruzioni Idrauliche E Marittime E Idrologiahydrological modellingphysically-based models
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