Lateral Flow Effect on Channel Resistance Prediction in the Divided Channel Method

Abstract

Divided channel method is practical method to analyze the flows on the compound or locally vegetated channel. In the flow resistance prediction on non-uniform flow, lateral flow effect at the boundaries of divided channel should be considered as same as apparent shear stress. In this study, new semi two-dimensional calculation method was proposed by using continuity and momentum equations which included lateral flow term, and verified with non-uniform flow experimental data. As the result, proposed model performed good agreement with observed data, and momentum transfer by lateral flow was significantly important compared with apparent shear stress on the nonuniform flow region.