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http://dx.doi.org/10.3741/JKWRA.2009.42.5.375

Study on Estimation for Discharge Coefficient of Diagonal Weir  

Im, Jang-Hyuk (Hyundai Institute of Construction Technology)
Jin, Sin-Wook (Dowha Consulting Engineers Co., LTD.)
Song, Jai-Woo (Dept. of Civil Engineering, Hongik Univ.)
Publication Information
Journal of Korea Water Resources Association / v.42, no.5, 2009 , pp. 375-383 More about this Journal
Abstract
This study examined hydraulic characteristics on diagonal weirs with hydraulic experiment and presented a discharge coefficient equation utilizing multiple regression analysis for various design conditions. This study had a object in designing efficiently diagonal weirs utilizing this equation. Diagonal weirs maintained uniformly upstream water level than rectangular suppressed weirs. Also, as installation degrees of diagonal weirs increased, diagonal weirs increased maintenance effects of a upstream water level. Because of these characteristics, diagonal weirs were suitable to canal system. This study presented discharge coefficient equations for diagonal weirs utilizing simple regression analysis. But, these equations are some restrictions on degrees. Therefore, this study presented an equation to estimate directly discharge coefficients to various degrees utilizing multiple regression analysis. This equation was verified by making use of analyses of $R^2$, the sum of residuals, MAPE. Therefore, this equation is enable to make good use of a design in diagonal weirs.
Keywords
diagonal weirs; long crested weirs; multiple regression analysis; hydraulic experiment;
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