Fishway for overcoming a wander obstacle in a

摘要

Fishway (1) for overcoming a wander obstacle in a, with a lengthwise extended, of a high water (ow) to a low water (uw) extending duct (2) with opposite side walls (3) and in each case at a spacing to one another in the channel (2) arranged partition walls (5), wherein from the side walls (3) and two adjacent partitions (5) in each case a basin (6) is limited, wherein between each partition wall (5) and a side wall (3) a flow cross section (7), which is in each case on the basis of a crown (9) of the partition wall (5) in the direction of a sole (4) of the channel (2), and the partitions (5) alternately at one and the other partition wall (5) and adjacent to a longitudinal direction of the channel (2) are positioned obliquely, as a result of which the tank (6) in the plan view, the form of a trapezoid or triangle, and – in each case in the longitudinal direction of the channel (2), of the considered an inflow cross-section (7_E) the flow cross section (7) forming a basin (6) at the upstream channel (ow) facing end of the basin (6) and an outlet (7_A) that forms a flow cross section (7) of this bowl (6) are in the middle of the basin (6) is located, characterized in that in each tank (6) a steering device (15) is located, which a distance to the on the inflow cross-section (7_E) adjacent partition (5) is arranged, and the through the inflow cross-section (7_E) flow entering the one hand, to a drift corridor (13) for the fish and, on the other hand, to a power reduction area (12), whereby the drift corridor (13) between the steering device (15) and which, at the inflow cross-section (7_E) adjacent partition wall (5) is located, and the power reduction area (12) of the steering device (15) of a side wall (3) of the channel (2) and which, at the outlet (7_A) adjacent partition (5) of the respective tank (6) is limited.