MODELLING CHANNEL ROUGHNESS COEF FICIENT USING DIMENSIONAL ANALYSIS

Authors

  • M.Y. Kasali 1National Centre for Agricultural Mechanization, Ilorin, Kwara State, Nigeria. Author
  • A.O. Ogunlela Department of Agricultural and Biosystems Engineering University of Ilorin, Ilorin, Kwara State, Nigeria. Author

Keywords:

Roughness coefficient, manning's equation, dimensional analysis, Buckingham's theorem, dimensionless terms

Abstract

A mathematical model for predicting the roughness coefficient of a channel was developed using
o establish
the relationship between the fluid, flow and channel geometric properties. This relationship was subjected
to a multiple regression analysis using the field data obtained from the channels, leading to the prediction
of the roughness coefficient. The predicted roughness coefficient was validated with Manning's
roughness equation and a high coefficient of correlation of 0.90 and a coefficient of determination, R2 of
0.814 between the predicted and Manning's coefficients were obtained. The analysis of variance
(ANOVA) showed that there was no significant difference between them at 5% level of significance.

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Published

2025-05-10

Issue

Vol. 22 No. 2 (2014): JOURNAL OF AGRICULTURAL ENGINEERING AND TECHNOLOGY (JAET)

Section

Articles