Attractive effects for different positions and orientations of fishway entrance

In order to find out the influence of different entrance orientations and positions on fish attractive effect, a generalized model of fishway entrance was established and three environmental velocity conditions were designed in this paper. Tests were carried out at fishway entrances of different orientations and positions. The results showed that the fishway entrance in the direction perpendicular to the river flow had better attractive effect than that in the direction parallel to the river flow at the same fishway entrance; When the fishway is located in the middle of the river, the closer the fishway entrance is to the tail water from the power station, the better the fish luring effect will be; In all conditions, when the environmental velocity is 0.3 m/s, there is the best attractive effect for the fishway entrance. The research results will have important reference significance for the layout of fishway entrance in hydraulic engineering and guide the engineering practice.