STUDY OF VARIATION OF ROUGHNESS COEFFICIENT IN CANALS

Abstract

Flow in open channels is complicated by the fact that the form of roughness element and hence resistance to flow and sediment transport are functions of characteristics of fluid, bed material and channel shape and alignment. The factors that effect the capacity of a channel are many and varied, one .o of which is the effect of roughness Chezy, Bazin and Manning tried to include these factors in the coefficient of rugosity or roughness coefficient, As this factor is not constant and it is dependent on many variables, assigning of a suitable value to the same is an important aspect in channel design as well as for predicting stage discharge relationship*,...