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http://dx.doi.org/10.3741/JKWRA.2016.49.1.29

Accuracy Analysis of HEC-RAS for Unsteady Flow Simulation considering the Flow Pattern Variations over the Side-weir of Side-Weir Detention Basin  

Kim, Sanghyuk (Dept. of Civil & Environmental Eng, Myongji University)
Yoon, Byungman (Dept. of Civil & Environmental Eng, Myongji University)
Kim, Dongsu (Dept. of Civil & Environmental Eng, Dankook University)
Kim, Seojun (Dept. of Civil & Environmental Eng, Dankook University)
Publication Information
Journal of Korea Water Resources Association / v.49, no.1, 2016 , pp. 29-39 More about this Journal
Abstract
Accurate quantitative assessment of flood control effect of side-weir detention basin as a flood countermeasure was highly required, in which one-dimensional HEC-RAS model has been widely utilized in practice. When the submerged overflow occurred particularly driven by limited storage capacity of a given detention basin, HEC-RAS model could not be sufficiently applicable by guaranteeing acceptable accuracy without reliable benchmark dataset. From this perspective, a dedicated unsteady experiment was planned and carried out to physically realize such submerged overflow for accommodating better accuracy. Subsequently, the experimental results were applied to validate and calibrate HEC-RAS unsteady modeling to provide flood control effect of the detention basin for various inflow scenarios. After following this procedure, the modelled results indicated that there appeared within -5% of difference in stage height and maximum 2.4% accuracy to assess the flood control effect, thereby ensuring the calibrated HEC-RAS unsteady model to be accurate with practically acceptable error range.
Keywords
HEC-RAS; unsteady flow experiment; side-weir detention basin; submerged overflow; error analysis;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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