| Development of a Debris Flow Model for Comprehensive Disaster Prevention Countermeasures in Coastal Area |
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Yeon-Joong Kim, Jung-Sung Yoon, Nakagawa Hajime, Sun-Bong Woo |
| 연안 지역에서의 통합적인 방재대책 구축을 위한 토석류 모델 개발 |
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김연중, 윤종성, 우선봉 |
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| Abstract |
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"The characteristics of natural disasters have become increasingly more difficult to predict due to the influence of climate change. In addition, the multi-environment zones (i.e., with various geographical risk factors) have very high potential disaster risks. Multiple debris flow disasters between mountainous areas and coastal, urban areas have occurred simultaneously with flooding disasters caused by heavy, torrential rainfall due to the changing global climate and environment. Preventing the occurrence of disasters with structural and non-structural measures is the most basic approach to disaster prevention. However, in order to mitigate these disasters more effectively, it is necessary to investigate what causes damage and establish a disaster prevention countermeasure according to the integrated system for a several disasters. Therefore, the aims of this study are to estimate the characteristic of debris flow at the fan area, and to establish an integrated plan for preventing disasters by develop an applicable debris flow model for an actual basin. To validate the developed 2-D numerical model, the results of hydraulic model test are compared with the results of the numerical calculation. The parameters of total flow and sediment discharges, sediment concentration, flow pattern, and travel length are measured in hydraulic experiment and used to validate the numerical model. As a result, the simulated results are in good agreement with the experimental results." |
| Key Words:
debris flow; numerical simulation; hydraulic experiment; disaster prevention |
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