Author(s): B. G. K. Rishnappan; Y. L. Lau

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Abstract: Using the theory of dimensions, it has been established that the dimensionless dispersion coefficient in the transverse direction in meandering channels is a function of the friction factor, meander amplitudeto- width ratio and the width-to-hydraulic radius ratio. An attempt is made to establish the functional relationship by measuring the dispersion coefficients for various values of the above-mentioned parameters. The meandering channels used for this study had realistic bottom configurations which resulted from the scouring and deposition of the sand forming the bottom of the channels in contrast to the rigid bottom channels used in the previous studies. The dispersion coefficients were evaluated using the Generalized Change of Moment Method. Different assumptions for the behaviour of the dispersion coefficient were tested but none exhibited superiority over the others. A numerical method has been developed to solve for the concentration distribution in a meandering channel.

DOI: https://doi.org/10.1080/00221687709499640

Year: 1977