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KMID : 1024520220310060461
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Journal of the Environmental Sciences
2022 Volume.31 No. 6 p.461 ~ p.470
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Comparison of Flooding Patterns according to the Location of the Collapse of Dam body
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Liu Dan-Xun
Lee Khil-Ha
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Abstract
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When an agricultural soil dam collapses, the extent of inundation and the rate of diffusion vary depending on where the collapse occurs in the dam body. In this study, a dam collapse scenario was established and a two-dimensional numerical model FLO-2D was used to closely examine the inundation pattern of the downstream residential area according to the dam collapse point. The results were presented as a flood risk map showing the changes and patterns of the extent of inundation spread. The flood level and the time to reach the maximum water level vary depending on the point of collapse, and the inundation of the downstream area proceeds rapidly in the order of the midpoint, left point, and right point collapse. In the left collapse point, the submergence appeared about 0.5 hour slower than the middle point, and the right collapse point appeared about 1 hour slower than the middle point. Since the relative damage pattern is different depending on the dam collapse point, insurance and disaster countermeasures will have to be established differently.
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KEYWORD
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Dam breach, Reservoir, Flood, Inundation
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