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http://dx.doi.org/10.14481/jkges.2019.20.4.23

Analysis of Liquefied Layer Activities Considering Erosion and Sedimentation of Debris Flow  

Kim, Sungduk (School of Civil Engineering, Chungbuk National University)
Lee, Hojin (School of Civil Engineering, Chungbuk National University)
Publication Information
Journal of the Korean GEO-environmental Society / v.20, no.4, 2019 , pp. 23-29 More about this Journal
Abstract
Heavy rainfall is in causing debris flow by recent climate change and causes much damage in the downstream. The debris flow from the mountainous area runs to the downstream, repeating sedimentation and erosion, and appears as a fluidized soil-water mixture. Continuity equation and momentum equation were applied to analyze the debris flow with strong mobility, and the sedimentation and erosion velocity with fine particle fractions were also applied. This study is to analyze the behavior of debris flow at the downstream end for the variation of the amount of sediments can occur in the upstream of the mountain. Analysis of sediment volume concentration at the downstream end of the channel due to the variance of the length of pavement of the granulated soils resulted in the higher the supply flow discharge and the longer the length of pavement, the greater the difference in the level of sediment concentration and the earlier the point of occurrence of the inflection point. The results of this study will provide good information for determining the erosion-sedimentation velocity rate which can detect erosion and sedimentation on steep slopes.
Keywords
Debris flow; Erosion; Sedimentation; Sediment volume concentration;
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Times Cited By KSCI : 1  (Citation Analysis)
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