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http://dx.doi.org/10.12652/Ksce.2015.35.5.1039

Flood Inflow Estimation at Large Multipurpose Dam using Distributed Model with Measured Flow Boundary Condition at Direct Upstream Channels  

Hong, Sug-Hyeon (Dankook University)
Kang, Boosik (Dankook University)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.35, no.5, 2015 , pp. 1039-1049 More about this Journal
Abstract
The inflow estimation at large multipurpose dam reservoir is carried out by considering the water balance among the discharge, the storage change during unit time interval obtained from the observed water level near dam structure and area-volume curve. This method can be ideal for level pool reservoir but include potential errors when the inflow is influenced by the water level slope due to backwater effects from upstream flood inflows and strong wind induced by typhoon. In addition, the other uncertainties arisen from the storage reduction due to sedimentation after the dam construction and water level noise due to mechanical vibration transmitted from the electric power generator. These uncertainties impedes the accurate hydraulic inflow measurement requiring exquisite hydrometric data arrangement for reservoir waterbody. In this study, the distributed hydrologic model using UBC-3P boundary setting was applied and its feasibility was evaluated. Finally, the modeling performance has been verified since the calculated determination coefficient has been in between 0.96 to 0.99 after comparing with observed peak inflow and total inflow at Namgang dam reservoir.
Keywords
Backwater effect; Distributed rainfall-runoff model; Multipurpose dam inflow; Uncertainty; Water stage-capacity curve;
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Times Cited By KSCI : 1  (Citation Analysis)
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