| 摘要 |
PROBLEM TO BE SOLVED: To provide a fish way for facilitating the upstream movement of fishery according to the behavior of the fishery. SOLUTION: The fish way 10 having a river bottom portion 11 formed with a slope and at least two side walls 15 for determining the width of a water channel comprises groined uneven portions 16 provided on the side faces of the side walls 15 at the side of the water channel for reducing the speed of a water flow.
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