Fish clustering effect and fish swimming trajectory model testing system

Abstract

The invention discloses a fish clustering effect and fish swimming trajectory model testing system. The system comprises a water tank, a water inlet pipe, a gradient pipeline, three arc-shaped plates,a water supplementing area, a long straight partition plate, a fish collection channel, four fish blocking nets, a reservoir, a fountain submersible pump, grid lines, a drain pipe and the like. By means of the testing system, the movement loci of fish and cognition of the fish clustering effect and swimming trajectory under different current gradient changes can be observed clearly; by means of flow field measurement, fish movement pictures and record data, the response regularity of fish migration and clustering behaviors for hydraulic characteristic factors can be explored, and test data and theoretical basis are provided for mining the response relationship between the water velocity and the fish migration and cluster behaviors in further depth; meanwhile, the defects that in the priorart, research on the current gradient is deficient and the testing process is unstable are overcome. The system is simple in structure and convenient to operate; the water resource is recycled, and the migration area is reduced while the water resource is saved.

Description

Technical field [0001] The invention relates to a fish passing facility in a water conservancy project, in particular to an indoor test system suitable for investigating the fish colony effect and the fish uptrack trajectory model, and belongs to the field of water conservancy engineering ecological environment. Background technique [0002] The construction of water conservancy and hydropower projects has destroyed the connectivity of the river and caused the fragmentation of the river, thereby blocking the channel for fish gene exchange and migration; fish crossing facilities are an important means to restore river connectivity by helping fish to cross the dam. Promote the migration and communication behavior of fish, and the group behavior is one of the important behaviors of fish. Due to social habits and other reasons, fish will form groups to perform orderly and uniform movement during spawning, feeding and migratory. Group behavior is defined as the cluster effect. The gr...

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Problems solved by technology

[0004] In my country, due to the lack of detailed field measurement data in some theoretical studies, most researchers only analyze from a theoretical perspective, which cannot reflect the actual behavior of fish in natural water flow. Therefore, the water flow conditions of fish passing facilities cannot meet specific goals. The physiological and ecological behavioral needs of fish, thus affecting the effective implementation and operation of fish passing facilities

The flocking behavior of fish is an important part of fish behavior research. In the existing research and design, most researchers simply use the flow rate index to characterize the influence of water flow conditions on fish migration and flocking behavior, and do not Digging deeply into the response relationship between water flow velocity and fish migration and swarming behavior, but also ignoring the multi-factor effects of other hydraulic characteristic factors (such as eddies, turbulent energy, and water depth, etc.) on fish migration and swarming behavior

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