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http://dx.doi.org/10.17820/eri.2022.9.3.141

Numerical Experiment of Debris Flow and Driftwood Behavior with Entrainment Erosion  

Kang, Tae Un (Research Organization of Science and Technology, Ritsumeikan University)
Jang, Chang-Lae (Department of Civil Engineering, Korea National University of Transportation)
Kimura, Ichiro (Faculty of Sustainable Design, University of Toyama)
Lee, Nam Joo (Department of Civil Engineering, Kyungsung University)
Publication Information
Ecology and Resilient Infrastructure / v.9, no.3, 2022 , pp. 141-153 More about this Journal
Abstract
In this study, a numerical model of debris flow considering driftwood and entrainment erosion is developed. Subsequently, numerical simulations based on the observation data of the 2011 Mt. Umyeon are performed. To develop the debris flow model, the Nays2DFlood model, which is a flooding model based on the shallow water equation, is coupled with the transport diffusion of mixed sediment concentration, debris flow bottom shear stress, and entrainment erosion modules. The simulation closely reproduced the depth, flow velocity, and debris flow volume of Mt. Umyeon. In addition, the reproducibility of the simulation result with driftwood is more accurate than that without driftwood. The results of this study can facilitate in establishing measures to reduce debris disasters, thus alleviating the current increase in debris damage due to climate change.
Keywords
Debris flow; Driftwood; Entrainment erosion; Hybrid model;
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Times Cited By KSCI : 3  (Citation Analysis)
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