Weibull Distribution Parameters Computation in Low Flow Phenomena

P. Manciola, A. Pierleoni, M. Bellezza, and S. Casadei (Italy)


Weibull, distribution, modelling, estimation and low flow.


The application of Weibull probability distribution to studies of low-flow phenomena is fairly frequent in literature [1] [2]. Application of this distribution, and in particular the estimation of the related parameters is affected to a far from negligible extent by the estimation procedures and by the size of the historical series of data used. This paper, therefore, suggests a calculation methodology for estimating the parameters of Weibull's function, used typically to evaluate absolute minimum flow rates, starting out from the investigation of a number of intermediate parameters that are essential for reaching the final estimates.

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