摘要：仿自然通道解决了传统工程鱼道中出现的许多问题。其水流条件接近天然河道，进口处可设置集鱼系统，通过补水等措施制造良好的流场，从而提高过鱼能力。为研究补水系统对集鱼系统中流态、流速分布等其他水力学特性的影响，本文采用整体模型试验的方法，重点对湖北省雅口航运枢纽工程过鱼设施进口处集鱼系统进行观测。通过分析试验结果，提出了能有效改善集鱼系统内外部流场的补水系统布置方法，可为类似工程提供参考。

Nature-like fishway has solved many problems existing in the traditional fishway． The flow condition at nature-like fishway is close to the natural channel，and fish collection system can be set up at nature-like fishway＇s entrance． It can improve the application results by producing appropriate flow fields through the water supplement system and other measures． Through integral model experiment of Yakou Hydraulic Project in Hubei Province，we study the flow regime，velocity distribution and other hydraulic characteristics of fish collection system at nature-like fishway＇s entrance． We propose the optimal layout of the water supplement system which can improve the internal and external flow field of fish collection system by analyzing the data from model experiments． This research can be a reference for similar projects．