alexa DEBRIS FLOW HAZARD ZONATION BY PROBABILISTIC ANALYSIS (MT. WOOMYEON, SEOUL, KOREA)
ISSN ONLINE(2319-8753)PRINT(2347-6710)

International Journal of Innovative Research in Science, Engineering and Technology
Open Access

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Research Article

DEBRIS FLOW HAZARD ZONATION BY PROBABILISTIC ANALYSIS (MT. WOOMYEON, SEOUL, KOREA)

Dowon Park1, Seungrae Lee2, Nikhil N.V.3, Shinhang Kang4, Junyoung Park5
M.S. Candidate, Department of Civil and Environmental Engineering, KAIST, 305-701, Daejeon,Korea 1,4,5
Professor, Department of Civil and Environmental Engineering, KAIST, 305-701, Daejeon,Korea2
Ph.D. Candidate, Department of Civil and Environmental Engineering, KAIST, 305-701, Daejeon,Korea3
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Abstract

This paper presents the application results of a regional,distributed empirical model: Flow path assessment of gravitational hazards at a Regional scale: (Flow-R) for a catchment on Woomyeon Mountain, Seoul, Korea. This model couples probabilistic and energetic algorithms for assessing of the spreading of flow and maximum runout distance. Flow-R also adopts the Geographic Information Systems (GIS) framework for determining the debris flow susceptibility for the whole mountain. In this paper,susceptibility scenarios have been simulated taking into account different source and propagation parameters.The best-fit values for the minimum plan curvature for initiating debris flow and the travel angle (vertical elevation to horizontal distance ratio) of runout distance were found to be -1/100 𝒎−𝟏 and 13°, and the resulting propagation on one of the calibration site was validated using the simplified frictionlimited model.Based on the results, the use ofthis model can be considered an important tool for debris flow analysis, especially in areas where related properties of the debris flow are not well defined.

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