An ecological fishway with staggered partition structure

Abstract

The invention discloses an ecological fish way with staggered spacer block structures. The ecological fish way comprises fish way side walls, a bottom plate, a plurality of hollow spacer block structures and the like, each spacer block structure comprises a straight section partition plate and an arc section partition plate, flow regulating water passing joints are arranged on the straight section partition plates and the arc section partition plates, the spacer block structures are arranged on the inner fish way side walls, the straight section partition plates are obliquely crossed with the inner side walls, an extended section is formed between the arc section partition plates of two opposite spacer block structures, a certain distance is reserved between the adjacent spacer block structures, and the fish way is divided into a plurality of cell compartments which are mutually communicated through the extended sections among the arc section partition plates. First cavities are formed in the fish way side walls, and driving plates are arranged inside the first cavities. Water flow in the ecological fish way naturally wriggles, the shortcoming of high water flow speed at a vertical slot of a traditional vertical slot fish way is effectively avoided, the influence of water conservancy and hydropower projects on fish migration can be reduced, and ecological protection of rivers is facilitated.

Description

technical field [0001] The invention relates to a fishway, in particular to an ecological fishway with a staggered partition structure, and belongs to the technical field of migratory fish crossing dam protection. Background technique [0002] The protection of aquatic organisms is an important issue that needs to be considered in the construction of water conservancy and hydropower projects. Aiming at the protection of fish resources, the country has issued a number of relevant regulations and laws. In rivers around the world, people have built a large number of water conservancy and hydropower projects for flood control, power generation, irrigation, shipping, and water supply. However, dams raise water levels and block rivers, causing the open and continuous system of natural rivers to suffer from energy flow, A series of changes in material circulation and information transmission have changed the habitat conditions and hydrological regimes required for the survival of f...

AI Technical Summary

Problems solved by technology

The tank wall and bottom of the Daniel-type fishway tank are equipped with baffles and sills. The flow rate is relatively large, which can improve the conditions for attracting fish downstream. However, the water flow is violent and the adaptability to water level changes is poor, so it is only suitable for those with poor swimming ability. Strong fish; the overflow weir fishway allows fish to pass through the top of the weir, and the flow is relatively stable, but the energy dissipation is insufficient, and the adaptability to water level changes is poor. It is only suitable for fish that like to migrate on the surface and have jumping habits; The submerged orifice type fishway is submerged underwater through the fishhole. It can adapt to the change of water level better, but the energy dissipation is not sufficient. It mainly relies on the diffusion of water flow to dissipate energy. Large and medium-sized fish migrating at the bottom; most of the tanks of the vertical slit fishway are intercepted, leaving only one vertical slit for passing fish, which has a sufficient energy dissipation effect, can adapt to large water level fluctuations, and can adapt to more complex flow regimes large and medium-sized fish, but it is easy to cause bending and turbulence of the water flow in the pool; the combined fishway is a combination of overflow weir, submerged hole and vertical joint, which can better exert the hydraulic characteristics of various types of orifices, and can Adapt to fish with different habits, but the structure is complex and the design is difficult

According to the characteristics of domestic hydropower projects and the characteristics of migratory fish, the fishway structure generally chooses the vertical slit type, but the vertical slit type fishway is easy to cause bending and turbulence of the water flow in the pool, due to the lack of water flow in the vertical slit type fishway The in-depth understanding of the habits and behaviors of fluid and migratory fish has led to major defects in most fishways in terms of attracting fish, maintaining the physical strength of passing fish, and continuing the development process of passing fish. At the same time, fishways are also The requirements of local fish for flow velocity and flow state are not met. These factors directly lead to the unsatisfactory operation effect of most fishways in my country after they are built.

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