关键词: 仿自然型鱼道; 断面形式; 消能率; 水槽试验;

Abstract: In order to make the traditional artificial natural-like fishway adapt to larger head, possess better flow pattern, and meet flow velocity requirements of different fishes, the influence of different cross-section forms on flow pattern of the artificial natural-like fishway was studied through flume model test and data analysis.Then, a cross-section form with multi-stage flow velocity was proposed, and on this basis, the energy dissipation rate of this fishway was studied.The results showed that by increasing the length and height of the first group of wild stones, and extending the flow path, the flow velocity of the low flow channel can be reduced.By adding a medium flow channel, the flow velocity of high flow channels on both sides can be reduced, the flow velocity of each channel was balanced, and the fish-passing efficiency of the section increased.The energy dissipation rate of the fishway section tended to decrease with increasing of water depth, and the energy dissipation efficiency was the highest when the water depth was as high as the first row of wild stones.Adopting this design can not only increase the efficiency of fish passage and fish species, but also make the fishway more adapt to large water head difference.Compared with previous design, it can shorten the fishway length and reduce the investment of project.The research results can provide reference for the design of natural-like fishway structure.

Key words: artificial natural-like fishway; section form; energy dissipation rate; flume experiment;