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http://dx.doi.org/10.14481/jkges.2021.22.8.5

The Study for Enhancing Resilience to Debris Flow at the Vulnerable Areas  

Kim, Sungduk (Dept of Civil & Environment Engineering, Cheongju University)
Lee, Hojin (School of Civil Engineering, Chungbuk National University)
Chang, Hyungjoon (School of Civil Engineering, Chungbuk National University)
Dho, Hyonseung (Dept of Civil & Environment Engineering, Cheongju University)
Publication Information
Journal of the Korean GEO-environmental Society / v.22, no.8, 2021 , pp. 5-12 More about this Journal
Abstract
Climate change caused by global warming increases the frequency of occurrence of super typhoons and causes various types of sediment disasters such as debris flows in the mountainous area. This study is to evaluate the behavior of debris flow according to the multiplier value of the precipitation characteristics and the quantity of debris flow according to the typhoon category. For the analysis of the debris flow, the finite difference method for time elapse was applied. The larger the typhoon category, the higher the peak value of the flow discharge of debris flow and the faster the arrival time. When the precipitation characteristic multiplier is large, the fluctuation amplitude is high and the bandwidth is wide. When the slope angle was steeper, water discharge increased by 2~2.5 times or more, and the fluctuation of the flow discharge of debris flow increased. All of the velocities of debris flow were included to the class of "Very rapid", and the distribution of the erosion or sedimentation velocity of debris flows showed that the magnitude of erosion increased from the beginning, large-scale erosion occurred, and flowed downstream. The results of this study will provide information for predicting debris flow disasters, structural countermeasures and establishing countermeasures for reinforcing resilience in vulnerable areas.
Keywords
Typhoon; Finite difference method; Value of multiplier of precipitation; Erosion or sedimentation velocity; Debris flow; Resilience;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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