Author(s)

S. Moharana, K. K. Khatua & M. Sahu

Abstract

The usual practice in one dimensional flow analysis is to select an appropriate value of roughness coefficient for evaluating the actual stage-discharge relationship of a natural channel. Reliable estimate of discharge capacity in meander open channel is extremely important from river engineering point of view. It helps the practitioners to provide essential information regarding flood mitigation, construction of hydraulic structures and prediction of sediment load so as to plan for effective preventive measures. Selection of the proper value of friction factor is essential for evaluating the actual carrying capacity of natural channel. An experimental investigation concerning the variation of friction factor for meandering channels with flow depths, aspect ratio, slope and sinuosity are presented. Here an effort has been made based on ANFIS to predict the friction factor of meander channel for both smooth and rough surfaces using the experimental as well as the data sets collected from literature study. Finally the results of the applied method predicts friction factor effectively. Keywords: meandering channel, sinuosity, stage-discharge relationship, bed slope, flow resistance, aspect ratio, fuzzy logic, fuzzy inference system, roughness ratio.

Keywords

Keywords: meandering channel, sinuosity, stage-discharge relationship, bed slope, flow resistance, aspect ratio, fuzzy logic, fuzzy inference system, roughness ratio.