Many types of landslide movement are induced by large rainstorms, and empirical rainfall intensity/duration thresholds for initiating movement have been determined for various parts of the world. In this paper, I present a simple pressure diffusion model that provides a physically based hydrologic link between rainfall intensity/duration at the ground surface and destabilizing pore-water pressures at depth. The model approximates rainfall infiltration as a sinusoidally varying flux over time and uses physical parameters that can be determined independently. If destabilizing pore pressures can be estimated, then the model enables the development of a stability criterion defining destabilizing rainfall intensity/duration conditions. Using a comprehensive data set from an intensively monitored landslide, I demonstrate that the model is capable of distinguishing movement-inducing rainstorms.
A pore-pressure diffusion model for estimating landslide-inducing rainfall
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Abstract
Publication type | Article |
---|---|
Publication Subtype | Journal Article |
Title | A pore-pressure diffusion model for estimating landslide-inducing rainfall |
Series title | Journal of Geology |
DOI | 10.1086/629714 |
Volume | 102 |
Issue | 6 |
Year Published | 1994 |
Language | English |
Publisher | University of Chicago Press |
Description | 9 p. |
First page | 709 |
Last page | 717 |
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