Abstract
Guangxi Changzhou Fishway is the first significant water conservancy project above the mouth of the Pearl River and also the first large fishway independently designed in China. It is the primary migration channel for six kinds of state-level protected fish, such as Chinese sturgeon and a typical vertical slit fishway. This paper takes the Changzhou fishway as the research object, based on the theory of fluid mechanics, and adopts the method of combining theoretical analysis, experimental research, and numerical simulation to study the flow field of different water depths in the pond. The analysis results show that the upper water flow has a larger resting area than the lower water flow, and the fishway has a rich flow field distribution and can produce “S” shaped meandering flow characteristics. The research results provide some reference for the design of vertical fishways.
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