| Title |
Development of Empirical Formula for Transverse Dispersion Coefficient Based on Theoretical Equation in River Bends |
| DOI |
https://doi.org/10.12652/Ksce.2012.32.6B.373 |
| Keywords |
횡분산계수;이론식;경험식;마찰항;만곡부 transverse dispersion coefficient;theoretical equation;empirical equation;friction factor;river bend |
| Abstract |
In this study, a new empirical equation for the transverse dispersion coefficient has been developed based on the theoretical background in river bends. The nonlinear least-square method was applied to determine regression coefficients of the equation. The estimated dispersion coefficients derived by the new equation were compared with observed transverse dispersion coefficients acquired from natural rivers and coefficients calculated by the other existing empirical equations. From a comparison of the existing transverse dispersion equations and the new proposed equation, it appears that the behavior of the existing formula in a relative sense is very much dependent on the friction factor and the river geometry. However, the new proposed equation does not vary widely according to variation of friction factor. Also, it was revealed that the equation proposed in this study becomes an asymptotic curve as the curvature effect increases. |