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http://dx.doi.org/10.17663/JWR.2017.19.2.181

Analysis of Flow and Bed Changes by Hydraulic Structure using CCHE2D: Focusing on Gangjeong-Goryeong Weir  

Ahn, Jung-Min (Nakdong River Environment Research Center, National Institute of Environmental Research)
Jung, Kang-Young (Nakdong River Environment Research Center, National Institute of Environmental Research)
Shin, Dongseok (Nakdong River Environment Research Center, National Institute of Environmental Research)
Lyu, Siwan (Department of Civil Engineering, Changwon National University)
Publication Information
Journal of Wetlands Research / v.19, no.2, 2017 , pp. 181-192 More about this Journal
Abstract
Analysis using a numerical model is important to understand the sediment transport mechanism associated with erosion and sedimentation near weirs and other hydraulic structures within riverine systems. The local riverbed change near a hydraulic structure (Gangjeong-Goryong multi-function weir in the Nakdong river) was analyzed in order to examine the effect of hydraulic structures on local bed change. A 2D numerical model (CCHE-2D) was employed to simulate the sedimentation and erosion over a reach (25 km) including the weir. For the calibration and verification of the model, rainfall data from a real event (Typoon 'Ewiniar' in 2006) were used for flow and stage simulation. And the simulated results show a good agreement with the observed data for the whole domain. From the result, it was found that the installation and operation of the weir could aggravate bed changes by typhoon between movable weirs, and which resulted in redistribution of sediment.
Keywords
CCHE2D; local bed change; hydraulic structure; flow filed;
Citations & Related Records
Times Cited By KSCI : 8  (Citation Analysis)
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