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
Journal of Geology
By: M.E. Reid
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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 |