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http://dx.doi.org/10.14346/JKOSOS.2017.32.3.112

Application of Risk Indexes for Classifying Vulnerable Zone and Planning Structural Alternative in Preparation for Debris Flow Disaster  

Oh, Seung Myeong (Department of Safety Engineering, Incheon National University)
Song, Chang Geun (Department of Safety Engineering, Incheon National University)
Jung, Min Hyung (Institute of Infrastructure Safety, Korea Infrastructure Safety Corporation)
Seong, Joo-Hyun (Institute of Infrastructure Safety, Korea Infrastructure Safety Corporation)
Publication Information
Journal of the Korean Society of Safety / v.32, no.3, 2017 , pp. 112-116 More about this Journal
Abstract
This study applied risk indexes to the disaster flow event occurred at Mt. Umyeon region in 2011. A 2D hydrodynamic model was employed to calculate flow characteristics, and the model was validated against two dam break flow problems conducted by Bellos and EU CADAM project. The model performance was shown to be satisfactory. In order to determine which index is more appropriate to assess the vulnerability of debris flow, 3 risk indexes (FII, FHR and VDI) were considered. It was found that VDI, which determines the risk level only by the velocity factor, consistently predicted the risk level corresponding to 6 because the velocity range was widely organized. However, in the case of FII and FHR, the risk was reasonably quantified due to combined consideration of significant factors of flow velocity and debris thickness. Therefore, FII and FHR are expected to be more accurate than VDI. However, two indexes still need to be improved to include major factors such as debris density or material properties.
Keywords
debris flow disaster; risk index; structural alternative; dam break problem;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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