Relation of the parameters of velocity profiles to hydraulic resistances

A general izat ion and analysis of the results of investigations conducted to cheek the known formulas and to refine the boundary values of k on the basis of hydrologic data for mountain r iven with small values of the Chezy coefficient and for piedmont and lowland rivers with large values of this coefficient confirmed the appl icabi l i ty of G. V. Zheleznyakov's formulas [2, 5] and the validi ty of the upper l imi t of the parameter k= kma x-