Abstract
To perform a three-dimensional current simulation in a wide region of a river with reducing computational load, we attempt to introduce a two-way nesting procedure, recently presented by the authors, into a three-dimensional numerical model for river flow. To examine the fundamental performance of the present model, we conduct the flood flow computation in the Edo River with the present numerical model. The results show that the computational results for the time sequences of discharge and lateral and vertical distributions of the streamwise velocity give good agreements with the observed data done by the authors. This fact demonstrates the fundamental applicability of the present numerical model with the nesting procedure to flood flow computations.
