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http://dx.doi.org/10.3741/JKWRA.2016.49.12.971

Analysis on the sediment sluicing efficiency by variation of operation water surface elevation at flood season  

Jeong, Anchul (Department of Civil Engineering, Chungnam National University)
Kim, Seongwon (Department of Civil Engineering, Chungnam National University)
Kim, Minseok (International Water Resources Research Institute, Chungnam National University)
Jung, Kwansue (Department of Civil Engineering, Chungnam National University)
Publication Information
Journal of Korea Water Resources Association / v.49, no.12, 2016 , pp. 971-980 More about this Journal
Abstract
In general, efficient operation of sediment sluicing is important in economical aspect. In this study, the efficiency of sediment sluicing by various operation at water surface elevation on multi-functional weirs were analyzed using Nays2DH, and we focused on the Dalsung weir at Nakdong river. The results of this study shows that, the same number of flushing channels and water gates were developed due to sediment sluicing, and sediment deposition occurred in upstream region of flushing channels. Also, the sediment sluicing efficiency increased by approximately 4.6% and sedimentation decreased by approximately 4.5% at EL. 14.5 m for operations on water surface elevation exceeding EL. 14.0 m. The mitigation of reservoir sedimentation and extension of maintenance dredging period are possible if the variation of sediment sluicing efficiency in various operation at water surface elevation during flood season are considered.
Keywords
Sediment Sluicing; Riverbed-Level Variation; Multi-Functional Weir; Nays2DH;
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Times Cited By KSCI : 7  (Citation Analysis)
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