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http://dx.doi.org/10.3741/JKWRA.2013.46.12.1209

Flow Resistance Analysis for Lower Naesung Stream Considering Grain and Bedform Roughness  

Ji, Un (River and Coastal Research Division, Korea Institute of Construction Technology)
Kim, Ji-Sung (River and Coastal Research Division, Korea Institute of Construction Technology)
Lee, Chan Joo (River and Coastal Research Division, Korea Institute of Construction Technology)
Publication Information
Journal of Korea Water Resources Association / v.46, no.12, 2013 , pp. 1209-1220 More about this Journal
Abstract
Roughness coefficients calibrated by flow modeling using the 1-dimensional numerical model were analyzed for the downstream section of Naesung Stream in this study. Also, the bedform configuration at the Hyangseok Station was predicted for measured and simulated hydraulic conditions of flows and total flow roughness was estimated with the coefficient of grain roughness. The Manning's n coefficients calibrated by numerical modeling and estimated by considering of grain and bedform roughness were compared and examined. As a result, the Manning's n by numerical modeling was greater than the coefficient range estimated by grain and bedform roughness at the low flow regime due to the other factors such as vegetation, sinuosity, and sand bar. However, the Manning's n by numerical modeling was included in the coefficient range by grain and bedform roughness at the transition and high flow regime over $500m^3/s$ of flow discharge.
Keywords
bedform configuration; flow resistance; grain roughness; Naesung stream; roughness coefficient;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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