*4.1. Experimental Data for the Derivation of Yang's Formula*

Yang determined the coefficients of Equation (4) by considering the logarithmic total sediment concentration, *logCF*, as the dependent variable and the *log(*ω·*d*50/ν*)*, *log(V*∗/ω*)*, *log(VS*/ω−*VcrS*/ω*)*, *log(*ω·*d*50/ν*)*·*log(VS*/ω−*VcrS*/ω*)*, *log(V*∗/ω*)*·*log(VS*/ω−*VcrS*/ω*)*, as the independent variables, and applying a multiple regression analysis for 463 sets of data in laboratory flumes.

These data were obtained by the following hydraulic and sediment transport related surveys, in laboratory flumes:


It should be mentioned that this research initiated with collecting and organizing the experimental data of the above surveys which, by itself, was a very laborious task. Moreover, an appreciable effort was put in dealing with inaccuracies and incorrect values found in bibliography, in order to record the exact and correct data, as they result from the initial surveys.
