流れの異なる場のワンド整備効果と課題

抄録

In the Yodo River, there is "Yodogawa ozeki" dam at the 10km spot from the river mouth, and the 15km section of upper reaches is backwater area. The section which a flow is seen in is always the upper classes. The fish aspect of the Yodo River received benefits such as ancient Lake Biwa, and there was variety including natural monument Itasenpara Bitterling (Acheilognathus longipinnis). However, several kinds of convention fish were not seen recently. In the Yodo River, Wando more than 500 exists until about 1970 and supported ecosystem, but the invasive influence of naturalized species such as low waterway widening, a change or the largemouth bass of the river channel with the linearization of the meandering has it pointed out with a big factor. Wand construction for ecosystem recovery was carried out from 1999 while it looked like it. In the backwater area, a Wand was made in contact with the original Wand, and, in the running water area, Wando was regenerated in the point where there was Wando once. Also, a Wando was made in the section between them. In this article, I analyze it about the effect and problem about the construction of Wando for in backwater area, running water area and between these areas.