Author(s): Gustavo Marini; Giuseppe De Martino; Nicola Fontana; Mauro Fiorentino; Vijay P. Singh
Linked Author(s): Fiorentino Mauro, Vijay Singh
Keywords: Entropy; flow measurement; open-channel flow; Shannon entropy; streamflow; velocity distribution
Abstract: In this paper, considering time-averaged velocity as a random variable, two-dimensional (2D) velocity distributions in open-channel flow have been derived based on the Shannon entropy concept and the principle of maximum entropy. The velocity distributions so derived have limited practical use, since they contain too many parameters that need to be experimentally calibrated and hence are not convenient to apply. This work develops a new entropy-based approach for deriving a 2D velocity distribution in open-channel flow, thereby investigating a rectangular geometric domain. The derived distribution is parsimonious, and the values determined using the proposed distribution are found to be in good agreement with the experimentally-measured velocity values.