DEPTH AVERAGED MODEL CONSIDERING TRANSFORMATION OF DOWNSTREAM VELOCITY IN CURVED CHANNEL IN GENERALIZED CURVILINEAR COORDINATE SYSTEM AND ITS VERIFICATION

Abstract

In curved channels, velocity distribution in the downstream direction is transformed by the secondary currents and the momentum transport is affected with redistribution of downstream velocity. Therefore, it is necessary.to include the transformation of downstream velocity in a depth averaged flow model in order to predict the river flows and channel processes effectively. In this study, 2-D model considering the transformation of the downstream velocity is derived and is verified by comparing with the experimental and 3-D results.