Abstract
A three-dimensional numerical model using the k-s turbulence model for open channel flow is proposed, which is based on the Galerkin finite element method using the shape function to be the product of the localized polynomial for the horizontal direction and the cosine function for the vertical direction. In this model, the computer storage, computing time and necessary data are remarkably reduced. The validity of this model is shown by mumerical examples for the open channel flow with rough wall having a logarithmic velocity distribution and the flow over rigid vegetation.
