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Water 2017, 9(5), 327; doi:10.3390/w9050327

Coupled Infiltration and Kinematic-Wave Runoff Simulation in Slopes: Implications for Slope Stability

Department of Geography, University of California, Santa Barbara, CA 93106, USA
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Author to whom correspondence should be addressed.
Academic Editor: Xixi Wang
Received: 30 March 2017 / Revised: 29 April 2017 / Accepted: 2 May 2017 / Published: 5 May 2017
(This article belongs to the Special Issue Water-Soil-Vegetation Dynamic Interactions in Changing Climate)
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Abstract

Shallow translational slides are common in slopes during heavy rainfall. The classic model for the occurrence of translational slides in long slopes assumes rising saturation above a slip surface that reduces the frictional strength by decreasing the effective stress along soil discontinuities. The classic model for translational slope failure does not conform well to the nature of homogenous soils that do not exhibit discontinuities propitious to create perched groundwater over the soil discontinuity or slip surface. This paper develops an alternative methodology for the coupled numerical simulation of runoff and infiltration caused by variable rainfall falling on a slope. The advancing depth of infiltration is shown to affect the translational stability of long slopes subjected to rainfall, without assuming the perching of soil water over the slip surface. This new model offers an alternative mechanism for the translational stability of slopes that are saturated from the slope surface downwards. A computational example illustrates this paper’s methodology. View Full-Text
Keywords: rainfall; runoff; infiltration; slope stability rainfall; runoff; infiltration; slope stability
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Johnson, J.M.; Loáiciga, H.A. Coupled Infiltration and Kinematic-Wave Runoff Simulation in Slopes: Implications for Slope Stability. Water 2017, 9, 327.

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