Naslov
Influence of turbulence on the accuracy of discharge measurements in natural streamflows

Autori
Bonacci, Ognjen

Izvornik
Journal of hydrology (0022-1694) 42 (1979), 3-4; 347-367

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
natural streamflows

Sažetak
The objective of this study was to solve some basic and current problems in the field of practical hydrometry and hydrology. As matter of fact, the basis of this study was that the problems have been theoretically dealt with but the results have found practical application. The problem of current meter measurement of discharge in natural stream-flows has been analyzed as well as the effect of the turbulent fluctuations (pulsations) on the possible accuracy of results obtained by this kind of measurements. Employing the mathematical model based on the results of the velocity distribution in a vertical (as defined by Nikitin) simulation of discharge in a schematized open river flow has been effected. By means of the analysis of variance the influence of the following four factors on the measurement accuracy has been estimated: (1) the number of velocity measurement points in a vertical ; (2) the number of velocity measurement verticals) ; (3) the position of measurements pints along the vertical ; and (4) the position of vertical along the cross-section. The optimum number of measurement vertical, their position in the cross- section as well as the number and position of the points for measuring the velocity by the current meter have been defined. The effect of the possible accuracy of discharge estimations on the accuracy of defining the rating curve has also been studied. The original, approximate procedure for estimating the upper limit of the absolute error in discharge measurements is also presented.

Izvorni jezik
Engleski

Znanstvena područja
Građevinarstvo

POVEZANOST RADA