FISHWAY BLOCK AND RIVERBED STRUCTURE USING IT

Japanese Patent JP3795132

B2

PROBLEM TO BE SOLVED: To enable fishes to swim upstream and downstream even against various flows such as low water time and high water time, and provide a fishway for the whole fishes and the like by arranging projecting parts by stones or imitative stones or the like so that water flowing on a surface of a block moves in a prescribed direction.
SOLUTION: In a direction setting type fishway block 1, projecting parts by stones are arranged in the diagonal line direction so that water flowing on a surface of a rectangular block main body moves in the prescribed direction. In a fishway block 4, a pair of projecting parts of stones or the like are arranged so that water flowing on the surface of the rectangular block main body concentrates and forms a waterway. A silent calm area type fishway block 7 and a block 10 which is a flat and shallow type and sticks algae and the like becoming a bait of fish are formed in addittion to these. The fishway block 4 is longitudinally used in the center, and waterway lines 20 are formed on both sides of it by using the fishway block 1. The block 7 and the block 10 are arranged in its other parts, and a riverbed is formed as a fishway over the whole cross section.

Takayuki Otsuki
Jiro Okamoto
Mikio Tomomori
Maekawa Kazunori
Abalone kenpei
Shuji Nomura
Niji Hideki

JP9712196A

July 12, 2006

April 18, 1996

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Landes Co., Ltd.

E02B8/08; (IPC1-7): E02B8/08

JP6264429A
JP56013152U
JP7011616A
JP6085422U
JP52109367U

Hirosaburo Mori

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