Sharp-crested weirs formula improvement

Abstrakt

The methods to determine discharge capacity of the sharp-crested weirs and the calculated dependencies based on them are analyzed. In most cases empirical weir discharge constants are used to calculate the discharge. These constants are obtained while investigating small-scaled sharp-crested weirs models in short range of operative factors. Herewith, scale effect of the transition from the models of the weirs, for which discharge constants were obtained, to the real structures is not taken into account. Discharges calculated by different dependencies, for the same conditions, can vary considerably among themselves. The developed mathematical model will improve sharp-crested weirs calculation methods on the bases of general accepted energy conservation principles without using empirical discharge constants.