Influence of dam and erodible bed material composition on landslide dam failure and induced morphological changes: an experimental study

Yang, Jiangtao; Shi, Zhenming; Soares-Frazão, Sandra; Zheng, Hongchao; Shen, Danyi

doi:10.1007/s10064-024-03556-6

Bull Eng Geol Environ

2024

DOI: 10.1007/s10064-024-03556-6

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Influence of dam and erodible bed material composition on landslide dam failure and induced morphological changes: an experimental study

Jiangtao Yang,

Zhenming Shi,

Sandra Soares-Frazão

et al.

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2024

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Cited by 2 publications

References 47 publications

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Qualitative analysis of the overtopping-induced failure of noncohesive landslide dams: Effect of material composition and dam structure on breach mechanisms

Shen,

Shi,

Yang

et al. 2024

Journal of Hydrology

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Qualitative analysis of the overtopping-induced failure of noncohesive landslide dams: Effect of material composition and dam structure on breach mechanisms

Shen,

Shi,

Yang

et al. 2024

Journal of Hydrology

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A 2D numerical model for simulating landslide dam failure and induced morphological changes considering multi-layer and non-uniform sediments

Yang,

Soares-Frazao,

Shi

et al. 2024

Journal of Hydroinformatics

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Landslide dams are formed by the blockage of rivers with landslides, or any debris flows. Such dams are prone to failure and therefore, simulation of their failure and induced morphological changes is of great importance for hazard mitigation. Multi-layer and non-uniform sediments are usually observed in landslide dam materials, but these are rarely considered in simulations. In this paper, a two-dimensional numerical model considering multi-layered and non-uniform sediments is proposed. The model solves the shallow water equations, the Exner equation considering the different size fractions and Hirano's active layer equation based on a finite volume scheme in a weakly coupled approach. Two experimental tests are used to assess the applicability and accuracy of the model. The results show that it can well simulate the flow and morphological changes, as well as the surface coarsening and fining phenomena related to multi-layer and non-uniform sediments. The numerical results of dam failure process and morphological changes are in overall good agreement with the experiments, but the peak discharge and bed elevation tend to be underestimated when finer material is considered. Finally, the influence of sediments fractions and active layer depth on numerical results, as well as the limitations of the model are discussed.

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Influence of dam and erodible bed material composition on landslide dam failure and induced morphological changes: an experimental study

Cited by 2 publications

References 47 publications

Qualitative analysis of the overtopping-induced failure of noncohesive landslide dams: Effect of material composition and dam structure on breach mechanisms

Qualitative analysis of the overtopping-induced failure of noncohesive landslide dams: Effect of material composition and dam structure on breach mechanisms

A 2D numerical model for simulating landslide dam failure and induced morphological changes considering multi-layer and non-uniform sediments

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