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http://dx.doi.org/10.3741/JKWRA.2012.45.5.495

Feasibility Analysis of HEC-RAS for Unsteady Flow Simulation in the Stream Channel with a Side-Weir Detention Basin  

Kim, Seo-Jun (Dept. of Civil & Environmental Eng, Myongji University)
Hong, Sang-Jin (Dongbu Engineering, Dept. of Water Resource & Environment)
Yoon, Byung-Man (Dept. of Civil & Environmental Eng, Myongji University)
Ji, Un (Dept. of Civil & Environmental Eng, Myongji University)
Publication Information
Journal of Korea Water Resources Association / v.45, no.5, 2012 , pp. 495-503 More about this Journal
Abstract
It is necessary to perform the precise analysis of unsteady flow for effective design of the side-weir detention basin installed in the river. Generally, the HEC-RAS program, which is a 1D unsteady numerical model, is mostly used to simulate the unsteady flow for rivers. However, it is difficult to have confidence of unsteady flow results simulated by HEC-RAS due to the lack of experimental data and field monitoring data for the channel with a side-weir detention basin. Therefore, the purpose of this study is to validate or verify the simulation results calculated by HEC-RAS through the experiments for the open channel with a side-weir detention basin using specially-designed unsteady discharge-supply system. The experimental cases included unsteady flows in the straight channel with and without a side-weir detention basin. Especially, for the case with a detention basin, the experiment was performed to consider only the free flow condition over the side-weir. The study results showed that values of water level and discharge obtained from HEC-RAS coincided reasonably with experimental results with the maximum error of 3% for water level and 1% for discharge in the case of the flow without the side-weir detention basin and 4% for water level and 2% for discharge with the side-weir detention basin.
Keywords
HEC-RAS; unsteady flow experiment; side-weir detention basin; free over flow;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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