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Effect of Land Slope on Propagation due to Debris Flow Behavior
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Effect of Land Slope on Propagation due to Debris Flow Behavior
Lee, Jun Seon; Song, Chang Geun; Kim, Hong Teak; Lee, Seung Oh;
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As sudden rainfall has happened, the debris flow has occurred in the mountain area. Recently sudden rainfall occurred so frequently caused by abnormal climate. Thus debris flow hazard had consecutively increased damage because of debris flow. Recently, Enormous damage due to debris flow have occurred in Korea. Various studies have been conducted to prevent search debris flow hazard. This study was carried out for debris flow behavior according to the land slope on propagation. It is the important one among factors that are related to the propagation over the city with respect to debris flow discharge and depth. For the numerical simulations in this study, the land slope was varied of 5, 0, to investigate the debris flow behavior with the FLO-2D, often recommended by FEMA to simulate debris flow. To verify the performance of FLO-2D, comparison with the USGS experiments (Iverson et al, 2010) was conducted. From numerical results the propagation length of the debris flow was found the most sensitive one. Maximum of debris flow thickness and velocity and structural vulnerabilities were investigated to the effect of land slope. They was became smaller according to land slope of 5, -5, in the order. As a result, debris flow behavior analysis about the effect of the land slope could contribute to understand the vulnerability of city for debris flow hazards.
debris flow;FLO-2D;structural vulnerability;land slope;
 Cited by
토사재해 위험지역의 구조적 대안 설정을 위한 사태물질 초기 질량분포 및 방어시설물 형상의 영향 분석,성주현;오승명;정영훈;변요셉;송창근;

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