Abstract

Coefficients of lateral momentum diffusion in open channel flows influenced by a series of groins were obtained from the detailed velocity profiles which were measured by LDV. The coefficients are not constant in lateral direction rather distribute with a peak in diffusion area of a groin. Magnitude of the coefficients are comparable or more less to compare with that of vertical momentum diffusion. It was found that the coefficients calculated from log-velocity distribution along the oblique line stretching from the shear layer of a groin correspond to the directly measured data.

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