Influence analysis of spatially variable cohesion on flow process and run-out distance of landslides

Weijie Zhang (), Wei Zhang, Yu Chen and Xin Wang
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Weijie Zhang: Hohai University
Wei Zhang: Hohai University
Yu Chen: Hohai University
Xin Wang: Hohai University

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2024, vol. 120, issue 7, No 4, 6057 pages

Abstract: Abstract The landslide is one of the most serious natural hazards that could greatly change the natural and man-made environments through the high-speed spreading and long-distance sliding. It has been widely accepted that the geomaterials are usually heterogenous with the nature of spatial variability that will affect the spatiotemporal evolution of a landslide. To address this problem, this study proposed a stochastic non-Newtonian smoothed particle hydrodynamics (SPH) model to analyze the flow process and run-out distance of landslides under spatially variable cohesion. Based on a conceptual landslide, the sliding process and run-out distance of each random sample were obtained from the Monte Carlo simulations. According to analysis results, the post-failure process and run-out distance distribution were discussed to reveal the influences of mean value ad coefficient of variation. Finally, simulated data were fitted to infer which type of distribution the run-out distance belongs to, and the determination coefficients for different distribution types were calculated to verify the proposed inference. It can be found that the average run-out distance changes with the mean cohesion, the distribution becomes wider as the coefficient of variation increases and the landslide run-out distance has the same distribution type as that of cohesion.

Keywords: Landslide; Run-out distance; Cohesion; Spatial variability; Stochastic analysis; SPH (search for similar items in EconPapers)
Date: 2024
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DOI: 10.1007/s11069-024-06443-1

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