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Tikrit Journal of Engineering Sciences (2006) 13(4) 96-115
Estimating Longitudinal and Transverse Dispersion Coefficients in Open Channel
|Karim Rashid Gubashi||Mohammed K. M.|
|Environmental Eng. Dept., Al-Mustansirya University, Iraq|
Results are presented from a series of laboratory experiments conducted on an open channel. Twenty five data sets (L1-L25) have been measured to obtain the magnitude of the longitudinal dispersion coefficient and eight data sets (T1-T8) have been performed to estimate transverse mixing coefficient in channel. The method involves derivation of a new expression for the longitudinal and transverse dispersion coefficients which used routing concentration of pollutant in the advection- dispersion equation solution in water quality mathematical model. Values of longitudinal and transverse dispersion coefficients are compared with measured data and previous similar studies. These comparisons have been showed that tracer technique by using second moment is the most accurate prediction of the longitudinal and transverse dispersions coefficients than the other techniques.
Keywords: Longitudinal Dispersion Coefficient, Transverse Dispersion Coefficient.