Design method of fish inlet conforming to natural flow law and fish behavior characteristics

Abstract

The invention discloses a fish inlet design method that conforms to natural flow rules and fish behavior characteristics, including five parts, one is to investigate the species and habits of fish in the collection project area, and the other is to collect or determine the target through the test of fish swimming ability. Fish characteristic flow velocity, including induced flow velocity S r , Swimming Speed ​​S b , and S l The third is to obtain the limit flow rate of the target fish in the natural river. The fourth is to start from the actual operation function after the project is completed, and find the gate and the operation mode of the fish passing facilities that are highly consistent with the current conditions of the natural state of the target fish before the project. The fifth is Determine the fish inlet water flow conditions and the size of the fish inlet that are sufficiently attractive to the target fish. The present invention can give full play to the original operation function of the project, and find the best fish-passing technical route that conforms to the flow characteristics of natural rivers and the hydraulic characteristics preferred by fish migration and cluster behavior. Connectivity has important socioeconomic and environmental benefits.

Description

technical field [0001] The invention belongs to the technical field of fish passing facility engineering construction, and in particular relates to a design method of a fish inlet conforming to natural flow rules and fish behavior characteristics. Background technique [0002] After the construction of permanent barrage structures on natural rivers, the continuity and hydrological rhythm of the river are changed, which is often a devastating blow to migratory and semi-migratory aquatic organisms that need to migrate in a large range during the completion of life history. Because these aquatic organisms cannot reach the original breeding grounds, feeding grounds or wintering grounds to complete their life cycle, the amount of resources has been seriously affected, the genetic diversity of the population has declined, the quality of fish has deteriorated, and rare and endangered fish are facing the risk of extinction. The construction of Sanhe and Wanfu Sluices in Yangzhou, Ji...

AI Technical Summary

Problems solved by technology

After the 1960s, fishways have developed rapidly in the United States, Canada, Europe, and Japan. However, due to the lack of in-depth research on fish behavior and natural river flow characteristics, key core technologies have not yet been broken through, and truly successful fishways have not yet been developed. Not much, the fishway built by the Garde Dam on the Seb River in North Africa in 1991 was not suitable for the upward tracing of sprats in the local rivers; in New South Wales, Australia, in the mid-1980s, due to the adoption of design standards that were not suitable for local fish, In the end, it was judged invalid, and similar situations happened in Japan and Taiwan, China

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