Study on Flow Characteristics and Ascending Fishes in the Fishway

近年来，人们从维护河流生态系统的角度对河流进行修复。因此，选择适合该生态系统条件和河流特有的地理、水力特性的鱼道类型就显得尤为重要。本研究由生态场、水流特性场和水质特性场组成，并从各个特定领域进行交叉研究。为了验证鱼道的功能，对现场鱼道进行了24小时的捕获和水力测量。结果表明，鱼道结构产生的水流特性与鱼类上行特性之间存在着一定的关系。同时，利用小型水下电视摄像机，对鱼道壁水流特性与鱼类上升路径的关系进行了详细的观测，对该河段的水环境特性和鱼类生态特性有了新的认识。

Recently, the river is repaired in the standpoint that maintains the river ecosystem. Therefore, it is important to be selected fishway type that adapted to the condition of the ecosystem and the river peculiar geographic and hydraulic characteristic.This study system was composed of ecological field and flow characteristic field and water quality characteristic field, and interdisciplinary was carried out from each particular field.In this study, in order to verify the fishway function the capture and hydraulic survey in the field fishway for 24 hours were carried out. As the results, the relation between flow characteristic which originates from the fishway structure and characteristic of ascending fishes was clarified. And, the relation between flow characteristic and ascending rout of fishes at the wall of fishway was minutely examined by the small underwater TV camera.In addition, a new knowledge on aquatic environment characteristic and ecological characteristics of the fish in the river was obtained.