Vertical seam fishway structure

Abstract

The invention discloses a vertical seam type fishway structure with a better energy dissipation effect. The vertical seam type fishway structure comprises side walls of a fishway and separating plate structures, wherein each separating plate structure is arranged on the side wall; the fishway is divided into a plurality of pools by the separating plate structures; each separating plate structure comprises a long separating plate and a short separating plate which are oppositely arranged; a pool vertical seam is reserved between the long separating plate and the short separating plate; the pools are communicated with each other through the pool vertical seams; and a hook-shaped pier is arranged at one end of the long separating plate forming the pool vertical seam. By using the vertical seam type fishway structure, water flow can be fully mixed, the energy dissipation effect is promoted; higher flow speed of the water at the vertical seam are avoided; the resistance endured by migrating fishes is reduced; the fishes can more easily pass by the fishway, so that the quantity of the fishes passing by the fishway can be increased; the influence of hydroelectric engineering on the migration of the fishes is reduced; and the ecological protection for rivers is boosted. The vertical seam type fishway structure is suitable for the popularization and application in the field of the fishway structure.

Description

technical field [0001] The invention relates to the field of fishway structures, in particular to a vertical slit fishway structure. Background technique [0002] The construction of hydropower and water conservancy projects can provide humans with relatively clean energy. However, in the actual implementation process, its impact on the ecological environment is very huge, especially the impact on the local river ecology. The construction of the dam has raised the water level and blocked Breaking the river makes it difficult for fish to migrate, especially for fish that need to migrate to spawn, it almost brings disaster. Therefore, the current relatively mature technology is to build fishways in hydropower and water conservancy projects, so that fish can Migrate smoothly. As an ecological restoration measure to mitigate the impact of fish being blocked by hydropower and water conservancy projects, fishways have attracted more and more attention from all walks of life and e...

AI Technical Summary

Problems solved by technology

According to the characteristics of domestic hydropower projects and the characteristics of migratory fish, the fishway structure generally chooses the vertical seam type. At present, the vertical seam type fishway structure adopted is as follows: figure 1 As shown, it includes the side wall of the fishway and the partition structure, the partition structure is arranged on the side wall, and the partition structure divides the fishway into a plurality of pool chambers, and the partition structure includes long partitions and short partitions The long partition and the short partition are arranged opposite to each other, and there is a vertical seam between the long partition and the short partition, and the pool chambers are connected to each other through the vertical seam of the pool chamber , the fish go upstream through the vertical slits of the pool chamber. This vertical slit fishway structure uses relatively arranged long and short partitions to divide the fishway into multiple pools. After the slit enters the next pool chamber, the water flow hits the long partition and the short partition to form a backflow area, and mixes with the subsequent water flow to play the role of energy dissipation, thereby reducing the flow velocity of the water flow, thereby reducing the number of migrating fish The resistance received makes it easier for fish to pass through the fishway. However, in the actual use process, it is found that the water flow in the tank chamber of the existing vertical slit fishway structure is not fully mixed, and the energy dissipation effect is poor. As a result, the water flow velocity at the vertical joint is relatively high, which makes the migratory fish suffer from greater resistance, which increases the difficulty for fish to pass through the fishway, and then reduces the number of fish passing through the fishway, making hydropower and water conservancy projects more harmful to fish. The impact of migration is relatively large, which is not conducive to the ecological protection of the river. Moreover, the corners of the ends of the existing partitions are at right angles, and fish are easily damaged by mechanical damage when they pass through the vertical seams of the pool chamber.

Images