| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To restore a natural environment with rearing of swimming fish or the like by developing a fishway capable of constructing an excellent fishway for enabling even bottom swimming fish incapable of jumping and running up to run up at a low cost and width small space, short work and less maintenance, in the case that a level difference is formed in a stream of a middle or small river and the run-up of swimming fish is obstructed. <P>SOLUTION: In the middle of a swimming fish route of a vertical fishway basic cylindrical body 1 produced with a light permeable material, a rotary partition wall 2 which obtains a power source by a limited water head stream bypassing a partition wall and performs a natural automatic continuous operation by a speed reduction mechanism is arranged. The high-speed natural discharge of stored water inside the vertical fishway basic cylindrical body by the water head is prevented, and the flow speed of the swimming fish route is suppressed to the maximum rushing speed or lower. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
