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http://dx.doi.org/10.3741/JKWRA.2017.50.9.587

Characteristics of sediment transportation and sediment budget in Nakdong River under weir operations  

Son, Kwang Ik (Department of Civil Engineering, Yeungnam University)
Jang, Chang-Lae (Department of Civil Engineering, Korea National University of Transportation)
Publication Information
Journal of Korea Water Resources Association / v.50, no.9, 2017 , pp. 587-595 More about this Journal
Abstract
Hydraulic characteristics affecting sediment transport capacity due to the weir operations were investigated and developed sediment rating curves for four gaging stations (Nakdong, Gumi, Waegwan, and Jindong) in Nakdong River. Analysis found that the sediment transportaion capability had been decreased and it could be proved from the field measurement records in 2013. Applicabilities of nine sediment transport prediction techniques, which are imbeded in GUIDE program, were examined and adopted for the four gaging stations. Analysis of sediment balance for Nakdong River, including 9 major tributaries, had been carried out with pseudo 2-D numerical model and found that: 1) sedimentation phenomena will be prevailed along the Nakdong River. 2) Engelund-Hansen technique shows the least error in estimation of sediment balance. 3) Engelund-Hansen technique most appropriately describes the sediment characteristics for four gaging stations. 4) Estimated error from the sediment balance for Nakdong River was smaller than the error caused by the estimation of sediment incomming from 9 tributries. Therefore, it is necessary to improve the accuracy of predicting the sediment incomming from the tributaties for better sediment balance analysis.
Keywords
Sediment balance; Nakdong River; Sediment transport capacity; Sediment rating curve; Numerical model;
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Times Cited By KSCI : 1  (Citation Analysis)
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