CRITICAL ANALYSIS OF EXISTING METHODS FOR CALCULATING CHANNELS WITH HETEROGENEOUS ROUGHNESS

This article examines the application of their methods, critically analyzing the data obtained as a result of many years of research when calculating the roughness channels of the actual work performed. The value of the reduced roughness coefficient when the flow is moving is always higher than one of the largest values of the roughness coefficients that make up the channel. According to the cross-section of the channels, the general calculation formula should be generalized, taking into account the possibility of different roughness of the sole.