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A mathematical approach on the two-dimensional dispersion induced by the shear flow was reviewed, and previous works for evaluating dispersion coefficients by theoretical methods were summarized. Based on the review, new equation, which can be widely used, for the transverse dispersion coefficient w...

A mathematical approach on the two-dimensional dispersion induced by the shear flow was reviewed, and previous works for evaluating dispersion coefficients by theoretical methods were summarized. Based on the review, new equation, which can be widely used, for the transverse dispersion coefficient was developed. The new equation was verified with tracer data sets which had been obtained from laboratory experiments conducted in unlike meandering channels. The results of verification showed that the new equation agreed better with the observed transverse dispersion coefficient than previous works because it considered appropriately effects of the shear flow. Moreover, the equation had high applicability to natural rivers due to its simple form resulting from a linear profile of the shear flow. Although it was not validated in natural streams owing to lack of field data, the equation had little differences compared "with existing empirical equations derived from field data.

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