Analysis of fish movement in the fishway by the numerical calculation

Abstract

From the engineering and biological view point, it is important to understand the movement of fish in the flow with artificial structures (e. g. fishway) or natural bed topography (e. g. bar and pool). There have been a large number of works on river flow with structures or fishway including numerical computational studies, however, the interaction between real river flow and fish movement have not been clarified. In this paper, an attempt is made to understand the fish movement in the flow by numerical experiment and flow visualization technique. According to these calculations, the movement of fish in the flow is indicated and visualization of result is shown.