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http://dx.doi.org/10.3741/JKWRA.2020.53.9.637

Analysis of debris flow simulation parameters with entrainment effect: a case study in the Mt. Umyeon  

Lee, Seungjun (Department of Agricultural and Rural Engineering, Chungnam National University)
An, Hyunuk (Department of Agricultural and Rural Engineering, Chungnam National University)
Kim, Minseok (Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources)
Lim, Hyuntaek (Department of Regional Infrastructure Engineering, Kangwon National University)
Publication Information
Journal of Korea Water Resources Association / v.53, no.9, 2020 , pp. 637-646 More about this Journal
Abstract
The shallow landslide-trigerred debris flow in hillslope catchments is the primary geological phenomenon that drives landscape changes and therefore imposes risks as a natural hazard. In particular, debris flows occurring in urban areas can result to substantial damages to properties and human injuries during the flow and sediment transport process. To alleviate the damages as a result of these debris flow, analytical models for flow and damage prediction are of significant importance. However, the analysis of debris flow model parameters is not yet sufficient, and the analysis of the entrainment, which has a significant influence on the flow process and the damage extent, is still incomplete. In this study, the effects of erosion and erosion process on the flow and the impact area due to the change in the soil parameters are analyzed using Deb2D model, a flow analysis model of debris developed in Korea. The research is conducted for the case of the Mt. Umyeon landslide in 2011. The resulting impacted area, total debris-flow volume, maximum velocity and inundated depth from the Erosion model are compared to the field survey data. Also, the effect of the entrainment changing parameters is analyzed through the erosion shape and depth. The debris flow simulation for the Raemian and Shindong apartment catchment with the consideration of entrainment effect and erosion has been successful. Each parameter sensitivity could be analyzed through sensitivity analysis for the two basins based on the change in parameters, which indicates the necessity of parameter estimation.
Keywords
Debris flow; Entrainment process; Parameter estimation; Deb2D;
Citations & Related Records
Times Cited By KSCI : 12  (Citation Analysis)
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