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August 20, 2026Water0 citationsOpen Access

Sediment Erosion and Transport Mechanisms Driven by Landslide-Induced Surges

Mechanism of Sediment Erosion and Transport by Landslide-Induced Surges: Insights from Laboratory Experiments and CFD-DEM Numerical Simulation

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Authors

CLCheng LiuPHPeifeng HanZXZhong Xiuling

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Overview

Experimental and numerical modeling reveals sediment scour and transport dynamics from landslide surges, indicating refined hazard prediction for dam-break events.

Key Points

  • Investigate how landslide fall height, water depth, and sediment gradation govern surge wave propagation, dam scour, and sediment transport dynamics.
  • Conducted 1:100 scale physical flume model experiments based on the Baige landslide dam prototype.
  • Performed coupled computational fluid dynamics and discrete element method (CFD-DEM) numerical simulations to analyze surge and sediment interactions.
  • Surge amplitude reached 38.21 cm under high-fall, deep-water conditions and decayed nonlinearly during propagation.
  • Fine-grained beds underwent suspended-load transport with up to 15.2% concentration, whereas coarse beds formed scour pits via bedload transport, increasing deposition volume by ~230%.
  • Identified a three-stage transport pattern: intense near-dam erosion (maximum depth 2.9 cm), grain-size-sorted middle-reach deposition (maximum height 4.6 cm), and fine downstream accumulation.

Cite This Study

Liu et al. (2026) studied this question.

synapsesocial.com/papers/6a86b5da8a91293e6a1cd5f1https://doi.org/10.3390/w18162025
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