Abstract
A lot of discharge coefficients in subcritical open-channel flows with a side-weir have been suggested as yet. Subramanya & Awasthy found that discharge coefficients were affected by four parameters, i.e., the Froude number, relative flow depth, relative weir height and relative weir length, by making use of a dimensional analysis. However, previous discharge coefficients were obtained from the experiments under the condition that the parameters were not changed systematically. This is because it is quite difficult to conduct such systematic experiments. Recently, it is pointed out that the relative flow depth does not affect on the discharge coefficient so much in comparison with the other parameters. In this study, all four parameters except for the relative flow depth were changed systematically in subcritical open-channel flows with a side-weir. A new discharge coefficient is suggested. It was found that the accuracy of the present discharge coefficient is quite high.
