The use of Regression Triplet in Hydraulic Modelling on the Example of Determination of Overfall Coefficient

PELIKAN PETR, MARKOVA JANA. 2016. The use of Regression Triplet in Hydraulic Modelling on the Example of Determination of Overfall Coeffi cient. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 64(2): 497–502. The paper is focused on a hydraulic problem of water overfall on hydrotechnic structures, especially outlets and spillways of water reservoirs. The main parameter of such structures is its discharge capacity depending on overfall coeffi cient, dimensions of spillway, gravitational constant and height of overfl owing water jet. The aim of investigation was the mathematical derivation of formula for calculation of overfall coeffi cient for sharp-crested spillway from observed data. The problem was solved with the aid of statistical method of nonlinear regression analysis, Gauss-Newton algorithm (nonlinear least squares). The objective of investigation was achieved by the design of new equation providing high confi dential results.