頭首工に設置された石組み魚道に関する実験から実務への適用

抄録

This paper presents the fish passage with stacking boulders which is installed in ogee crest weir. Practically, the fish passage with stacking boulders was constructed in both Murasaki and Ukan Rivers. In order to install the fish passage as a semi-permanent construction, the experiments on the stabilization of stacking boulders were carried out. Also, a stone masonry method with stacking boulders as the fish passage was discussed. The experiment revealed that the stability of the fish passage with stacking boulders was confirmed under several types of discharges. In the case of Murasaki River, Kitakyushu city, Fukuoka pref., the masonry without filling by concrete was applied for stacking boulders. While, In the case of Ukan River, Okayama city, Okayama pref., the masonry with filling by concrete was applied. The necessity of filling by concrete depends on the impingement of flood flows and the water leakage in construction area.