籠川における多自然魚道の追跡調査結果について

抄録

In the normal fishway, concrete man-made structure such as an ice-harbor type, the vertical-slot type is common. They make it possible that fish move ahead of a drop works. However, they do not often match neighboring nature scenes. In addition, they cannot improve the biotope of the creature.

In contrast, the fishway made with near-natural method of construction is close in an appearance in the natural shallows. A fish can use the fishway as a habitat. The fishway does not lose the function of the fishway so that riverbed materials are removed by the power of the flood naturally. The fishway is structure having many steps and pools. Because it is constructed of stone, groundfish can go up the steps.

This paper reports the results of the follow-up survey about the fishway which made with near-natural method of construction in Kago river.