The aim of this study was to determine how well the landslide susceptibility parameters, obtained... more The aim of this study was to determine how well the landslide susceptibility parameters, obtained by data-dependent statistical models, matched with the parameters used in the literature. In order to achieve this goal, 20 different environmental parameters were mapped in a well-studied landslide-prone area, the Asarsuyu catchment in northwest Turkey. A total of 4400 seed cells were generated from 47
Slope‐stability analyses are mostly conducted by identifying or assuming a potential failure surf... more Slope‐stability analyses are mostly conducted by identifying or assuming a potential failure surface and assessing the factor of safety (FS) of that surface. This approach of assigning a single FS to a potentially unstable slope provides little insight on where the failure initiates or the ultimate geometry and location of a landslide rupture surface. We describe a method to quantify a scalar field of FS based on the concept of the Coulomb stress and the shift in the state of stress toward failure that results from rainfall infiltration. The FS at each point within a hillslope is called the local factor of safety (LFS) and is defined as the ratio of the Coulomb stress at the current state of stress to the Coulomb stress of the potential failure state under the Mohr‐Coulomb criterion. Comparative assessment with limit‐equilibrium and hybrid finite element limit‐equilibrium methods show that the proposed LFS is consistent with these approaches and yields additional insight into the ge...
... Direction of unsaturated flow in a homogeneous and isotropic hillslope. Ning Lu. Division of ... more ... Direction of unsaturated flow in a homogeneous and isotropic hillslope. Ning Lu. Division of Engineering, Colorado School of Mines, Golden, Colorado, USA. Basak Sener Kaya. Division of Engineering, Colorado School of Mines, Golden, Colorado, USA. Jonathan W. Godt. ...
Prediction of the location and timing of rainfall‐induced shallow landslides is desired by organi... more Prediction of the location and timing of rainfall‐induced shallow landslides is desired by organizations responsible for hazard management and warnings. However, hydrologic and mechanical processes in the vadose zone complicate such predictions. Infiltrating rainfall must typically pass through an unsaturated layer before reaching the irregular and usually discontinuous shallow water table. This process is dynamic and a function of precipitation intensity and duration, the initial moisture conditions and hydrologic properties of the hillside materials, and the geometry, stratigraphy, and vegetation of the hillslope. As a result, pore water pressures, volumetric water content, effective stress, and thus the propensity for landsliding vary over seasonal and shorter time scales. We apply a general framework for assessing the stability of infinite slopes under transient variably saturated conditions. The framework includes profiles of pressure head and volumetric water content combined ...
The aim of this study was to determine how well the landslide susceptibility parameters, obtained... more The aim of this study was to determine how well the landslide susceptibility parameters, obtained by data-dependent statistical models, matched with the parameters used in the literature. In order to achieve this goal, 20 different environmental parameters were mapped in a well-studied landslide-prone area, the Asarsuyu catchment in northwest Turkey. A total of 4400 seed cells were generated from 47
Slope‐stability analyses are mostly conducted by identifying or assuming a potential failure surf... more Slope‐stability analyses are mostly conducted by identifying or assuming a potential failure surface and assessing the factor of safety (FS) of that surface. This approach of assigning a single FS to a potentially unstable slope provides little insight on where the failure initiates or the ultimate geometry and location of a landslide rupture surface. We describe a method to quantify a scalar field of FS based on the concept of the Coulomb stress and the shift in the state of stress toward failure that results from rainfall infiltration. The FS at each point within a hillslope is called the local factor of safety (LFS) and is defined as the ratio of the Coulomb stress at the current state of stress to the Coulomb stress of the potential failure state under the Mohr‐Coulomb criterion. Comparative assessment with limit‐equilibrium and hybrid finite element limit‐equilibrium methods show that the proposed LFS is consistent with these approaches and yields additional insight into the ge...
... Direction of unsaturated flow in a homogeneous and isotropic hillslope. Ning Lu. Division of ... more ... Direction of unsaturated flow in a homogeneous and isotropic hillslope. Ning Lu. Division of Engineering, Colorado School of Mines, Golden, Colorado, USA. Basak Sener Kaya. Division of Engineering, Colorado School of Mines, Golden, Colorado, USA. Jonathan W. Godt. ...
Prediction of the location and timing of rainfall‐induced shallow landslides is desired by organi... more Prediction of the location and timing of rainfall‐induced shallow landslides is desired by organizations responsible for hazard management and warnings. However, hydrologic and mechanical processes in the vadose zone complicate such predictions. Infiltrating rainfall must typically pass through an unsaturated layer before reaching the irregular and usually discontinuous shallow water table. This process is dynamic and a function of precipitation intensity and duration, the initial moisture conditions and hydrologic properties of the hillside materials, and the geometry, stratigraphy, and vegetation of the hillslope. As a result, pore water pressures, volumetric water content, effective stress, and thus the propensity for landsliding vary over seasonal and shorter time scales. We apply a general framework for assessing the stability of infinite slopes under transient variably saturated conditions. The framework includes profiles of pressure head and volumetric water content combined ...
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