Title:
魚道及び魚道形成方法
Document Type and Number:
Japanese Patent JP6871599
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a fishway and a forming method thereof that allow the fishway to be constructed readily at a low cost and facilitate running up of fishes.SOLUTION: A fishway 3 of the present invention includes: a first surface 1 formed in a water channel; a second surface 2 positioned closer to a water surface side of the water channel than the first surface 1 at a position opposite to the first surface 1 in a normal direction, to entirely or partially cover above the first surface 1, and formed in the water channel with an inclination to an in-plane direction of the first surface 1 in such a way as to come close to the first surface 1 from one edge side toward the other edge side; an extension part that is at the other edge side of the second surface 2 or extending from the other edge side toward the first surface 1; and a narrow part regulating movement of fishes between the first surface 1 and the other edge side of the second surface 2. The fishway extends as a space partitioned by the first surface 1, the second surface 2 and the narrow part on an opposite surface side of the first surface 1 and the second surface 2, along the other edge side of the second surface 2.SELECTED DRAWING: Figure 1
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Inventors:
Keiko Muraoka
Application Number:
JP2017011380A
Publication Date:
May 12, 2021
Filing Date:
January 25, 2017
Export Citation:
Assignee:
Civil Engineering Research Institute
International Classes:
E02B8/08
Domestic Patent References:
| JP9078559A | ||||
| JP2005282287A | ||||
| JP11350462A | ||||
| JP2004298172A |
Foreign References:
| US6942423 |
Attorney, Agent or Firm:
Shin Shioda