Abstract Fishway design not only takes into account the swimming abilities of target fishes, but also considers hydrodynamic characteristics within fishway. In this study, flow fields one vertical-slot fishway ( i.e. VSF), five T-shape fishways TSF-1~TSF-5) and two H-shape (i.e. HSF-1 HSF-2) are numerically simulated by solving three-dimensional Reynolds-averaged Navier-Stokes equations K-Omega...