Abstract
The mean longitudinal motion of fluid particles dispersing in a natural river channel for distances up to 800 widths on a small mountain stream and up to approximately 1200 widths on the Missouri River is shown to be different from that predicted by a Taylor type dispersion model. The dispersing cloud is shown to exhibit the characteristics of a self‐similar process, with constant velocity ratios and geometric form, and a dimensionless time‐concentration curve is developed. Based upon the dimensionless coordinates of this form and the linearity of its scaling parameters, a method for prediction of the dispersion pattern is developed.
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