学生員 東洋大学大学院 工学研究科 環境・デザイン専攻(〒350-8585 埼玉県川越市鯨井2100)2 正会員 博(工) 東洋大学講師 理工学部 都市環境デザイン学科 3 学生員 東洋大学大学院 理工学研究科 都市環境デザイン専攻
正会員 工博 東洋大学教授 理工学部 都市環境デザイン学科This research was conducted to make clear the characteristics of run up of fish in the small model full cross fish way with rubble stones. The efficiency of fish way depends on the structure (shape, bottom slope, rubble size), hydraulics (velocity, depth, turbulence).At first, Authors clarified the relation between the run up ratio and flow condition; Namely, 1) as discharge becomes bigger, velocity increases over than the limit of the swimming capability, run up ratio becomes lower consequently, 2) in the case of longer fish way, the run up ratio becomes lower since fish can not keep the maximum swimming speed (burst speed) for so long time.Next, authors consider the improvement the run up ratio by adding pocket or flat space with rubbles damping the velocity on the way of fish way.Finally, a research was conducted the effectivity in the situation that a part of fish ways were broken.
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