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Integrated numerical study of rainfall-induced landslides from initiation to propagation using saturation-based rheological model

Ghorbani, R ; Sharif University of Technology | 2022

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  1. Type of Document: Article
  2. DOI: 10.24200/sci.2022.58125.5577
  3. Publisher: Sharif University of Technology , 2022
  4. Abstract:
  5. This paper presents an integrated two-dimensional numerical framework for simulating rainfall-induced landslides from instability initiation to post-failure flow. To describe the entire process, three steps are considered in this study: (1) a coupled hydrostability analysis which detects the failure plane using the Finite Element Method (FEM) (pre-failure stage); (2) computing the local rheology of the failed mass (wet sandy soil) based on the water saturation at the onset of failure using the saturation-based rheological model (transition stage); and (3) a continuum-based propagation analysis which solves the flow of the wet material employing the Smoothed Particle Hydrodynamics (SPH) method (post-failure stage). Finally, to investigate the in fluence of rheological model on the postfailure behavior, the computed final deposition profile and flow kinetic energy are compared with those of a viscoplastic model. © 2022 Sharif University of Technology. All rights reserved
  6. Keywords:
  7. Initiation ; Propagation ; Rainfall-induced landslide ; Slope stability ; Hydrodynamics ; Kinetic energy ; Landslides ; Rain ; Slope protection ; Failure plane ; Hydro-stability ; Rainfall induced landslides ; Rheological models ; Sandy soils ; Sandysoil ; Saturation-based rheological model ; Two-dimensional ; Kinetics ; Fault propagation ; Landslide ; Rheology
  8. Source: Scientia Iranica ; Volume 29, Issue 5 B , 2022 , Pages 2304-2316 ; 10263098 (ISSN)
  9. URL: https://scientiairanica.sharif.edu/article_22686.html