A vertically ascending, slotted fishway

Abstract

This invention provides a vertically ascending, slotted fishway, relating to the field of fishway technology. It includes an inlet pool connected to an outlet pool via a vertically ascending channel. The inlet pool has several first inlets on its wall, and the outlet pool has several first outlets on its wall. The vertically ascending channel includes several main vertically ascending channels connected by ascending bends. The interior of each main channel is divided into several chambers by several first partitions, and these chambers are interconnected. The interior of each ascending bend is divided into rest areas and passageways by second partitions, and these rest areas and passageways are interconnected. This invention has low construction costs, good terrain adaptability, and can effectively maintain the stability and diversity of fish populations.

Description

Technical Field

[0001] This invention relates to the field of fishway technology, specifically a vertically slit-type fishway with a vertically rising structure. Background Technology

[0002] The construction of dams inevitably severs the breeding channels of migratory fish, resulting in a severe decline in the variety and quantity of migratory fish in the river basin. Fishways, as an effective engineering technique, are a key measure to mitigate the impact of dam construction on fish and river connectivity. The construction of fishways aims to help obstructed fish successfully cross dams or other obstacles to migrate to their important habitats such as breeding grounds, feeding grounds, or overwintering grounds. Through the construction of fishways, biological resources can be effectively protected, genetic information exchange between fish upstream and downstream of the dam can be promoted, the natural fish gene pool can be maintained, the burrowing diversity of fish germplasm resources can be guaranteed, and the stability of fish population structure can be maintained.

[0003] However, traditional fishways typically require a large amount of land, which is especially evident at high dam sites with complex terrain. Traditional fishways have many drawbacks, such as complex layout, high construction costs, and long construction periods. They also have certain limitations in adapting to different dam heights and cannot be flexibly adjusted. Summary of the Invention

[0004] In view of the above-mentioned prior art, the present invention proposes a vertically slit-type fishway with a vertically rising structure.

[0005] This invention provides a vertically ascending, slit-type fishway, comprising an inlet pool connected to an outlet pool via a vertically ascending channel. The inlet pool has several first inlets on its wall, and the outlet pool has several first outlets on its wall. The vertically ascending channel includes several vertically ascending main channels, adjacent main channels being connected by ascending bends. The interior of each main channel is divided into several pool chambers by several first partitions, and these pool chambers are interconnected. The interior of each ascending bend is divided into rest areas and passageways by second partitions, and these rest areas and passageways are interconnected.

[0006] Preferably, the pool wall for entering the pool is provided with three first inlets, and the pool wall for exiting the pool is provided with three first outlets.

[0007] Preferably, several flow promoters are installed at both the first inlet and the first outlet. The design needs to consider the location and number of the flow promoters, as well as their coordination with the fishway inlet, to ensure that the flow promoters can provide suitable flow velocity selection and guide fish into the fishway. At the same time, regular maintenance and cleaning of the flow promoters are required to ensure their normal operation and effective functioning.

[0008] Preferably, the flow promoter includes a base, which is connected to a stirrer via a traction rope. The stirrer is equipped with a flow rate adjustment sensor. By installing a flow rate adjustment sensor on the flow promoter, the flow rate can be adjusted according to different time periods and fish migration habits, and further adjusted based on the preferred flow rate of the target fish species to provide a suitable migration environment and improve fish migration efficiency.

[0009] Preferably, the base is made of concrete or stone; the traction rope is made of steel wire; and the disturbance is made of lightweight material. The shape and size of the disturbance can be designed and adjusted as needed to generate a turbulent flow field that is suitable for fish.

[0010] Preferably, the first partition includes large partition units and small partition units that are staggered from each other.

[0011] Preferably, the rest area is equipped with a main rest pool or an auxiliary rest pool. The main rest pool is used to provide a burrowing ecological environment for fish, and the auxiliary rest pool is used to provide a natural riverbed environment for fish.

[0012] Preferably, the main resting pool includes a pool box, with a second entrance that runs vertically through the right side of the front wall of the pool box, and a second outlet extending from left to right on the upper left side of the front wall of the pool box. The interior of the pool box contains sand, pebbles, and aquatic plants.

[0013] Preferably, the auxiliary rest pool includes a pool box, the inside of which is provided with a soil cavity, the soil cavity and the right side of the front wall of the pool box are provided with a number of corresponding circular third inlets, the left top wall of the soil cavity is provided with a number of circular third outlets, and the inside of the soil cavity is filled with sand and gravel.

[0014] Preferably, the vertical ascending channel is made of reinforced concrete, with a slope of 2%-6.5% for each main channel and an ascending height of 4-7m.

[0015] Compared to existing technologies, the advantages of this invention are as follows: This invention provides a vertically ascending, slotted fishway with lower construction costs, better terrain adaptability, and can be adjusted according to actual engineering needs. Simultaneously, the water flow conditions and resting environment inside the fishway better meet the migratory needs of fish, increasing their success rate in navigating the fishway. This invention, through its innovative fishway design, solves the problems of large footprint and poor adaptability of traditional fishways. This invention features low construction costs, high space utilization, strong terrain adaptability, and excellent passage and energy dissipation conditions, effectively maintaining the stability and diversity of fish populations. Attached Figure Description

[0016] Figure 1This is a three-dimensional schematic diagram of a vertical slit fishway in an embodiment of the present invention.

[0017] Figure 2 This is a plan view of the vertical slit fishway in an embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of the flow generator in an embodiment of the present invention.

[0019] Figure 4 This is a schematic diagram of the main rest pool in an embodiment of the present invention.

[0020] Figure 5 This is a schematic diagram of the auxiliary rest pool in an embodiment of the present invention.

[0021] In the diagram: 1. Pool inlet; 2. Pool outlet; 3. First inlet; 4. First outlet; 5. Base; 6. Traction rope; 7. Disturber; 8. Flow rate adjustment sensor; 9. Main channel; 10. Climbing bend; 11. First partition; 12. Pool chamber; 13. Second partition; 14. Rest room; 15. Passageway; 16. Pool box; 17. Second inlet; 18. Second outlet; 19. Pool box; 20. Soil cavity; 21. Third inlet; 22. Third outlet. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations.

[0023] Example: Figure 1-5 The vertically raised structure of the vertical slotted fishway shown includes a square inlet pool 1, which is connected to a square outlet pool 2 through a vertically raised channel. Each of the three sides of the inlet pool 1 is provided with a first inlet 3, and each of the three sides of the outlet pool 2 is provided with a first outlet 4.

[0024] Furthermore, two flow promoters are installed at both the first inlet 3 and the first outlet 4 to change the direction and speed of the water flow and provide a suitable migration channel. Each flow promoter includes a base 5, which is connected to a disturbance 7 via a traction rope 6. A flow velocity adjustment sensor 8 is installed on the disturbance 7, which can adjust the flow velocity according to the preferred flow velocity of the target fish species. The base 5 is made of cast concrete to ensure the stability and fixation of the flow promoter; the traction rope 6 is made of steel wire to ensure that the flow promoter can move freely and suspend in the water; the disturbance 7 is made of lightweight material and can suspend in the water to generate a turbulent flow field suitable for fish.

[0025] The flow propeller 7 adjusts the speed and direction of the water flow at the inlet, and the flow velocity at the inlet cross-section is monitored in real time by the flow velocity regulation sensor 8 to provide the most suitable water flow conditions for fish migration and increase the success rate of fish swimming upstream. Along the longitudinal direction of the water flow, the flow propeller is set at non-equidistant intervals to create multiple flow velocity zones at the inlet, so that fish of different sizes and swimming abilities can pass through and provide channels for fish migration.

[0026] Furthermore, the vertical ascending channel includes several vertically ascending main channels 9, which are connected by ascending bends 10. The vertical ascending channel is made of reinforced concrete and ascends vertically from the downstream water level to the upstream water level. The slope of each main channel 9 is 5%, the ascending height is 6m, and the total ascending height is 100m. The interior of the main channel 9 is divided into several pool chambers 12 by several first partitions 11 at equal intervals. The first partitions 11 include large partition units and small partition units that are staggered to each other, so that the pool chambers are interconnected. The interior of the ascending bends 10 is divided into rest rooms 14 and passageways 15 by second partitions 13, and the rest rooms 14 and passageways 15 are interconnected.

[0027] Furthermore, the rest room 14 is equipped with a main rest pool or an auxiliary rest pool, which are staggered and distributed in several rest rooms 14. The main rest pool is used to provide a burrowing ecological environment for fish, and the auxiliary rest pool is used to provide a natural riverbed environment for fish.

[0028] Furthermore, such as Figure 4 As shown, the main resting pool includes a pool box 16. A second entrance 17 that runs vertically through the right side of the front wall of the pool box 16 is provided, and a second exit 18 that extends from left to right is provided on the upper left side of the front wall of the pool box 16. The interior of the pool box 16 is filled with sand, pebbles, and aquatic plants.

[0029] The main resting pool provides a stable environment for fish, helping them recover their strength for better upstream migration. The rocks, varying in size and arranged in a staggered pattern, provide hiding spaces for the fish, creating a relatively still water environment and a habitat that simulates their natural environment, meeting their burrowing ecological needs and attracting them to enter and rest. Fish enter the main resting pool through the second entrance 17 and exit through the second exit 18, continuing their upward ascent to complete their migration. The second entrance 17 connects to the front section of the pool, allowing fish to easily and quickly find the resting pool. The exit section uses a perforated structure and connects to the rear section of the pool, enabling fish to leave the resting pool more efficiently.

[0030] In this embodiment, sand, boulders, and aquatic plants are arranged in the main resting pool to create a more ecological resting pool environment, which can provide resting conditions for upstream fish. After multiple rotations and ascents, the fish reach the fishway exit and complete this homing.

[0031] Furthermore, such as Figure 5 As shown, the auxiliary rest pool includes a pool box 19, and the interior of the pool box 19 is provided with a soil cavity 20 (that is, the outer shell of the cavity is made of soil). The soil cavity 20 and the right side of the front wall of the pool box 19 are provided with five corresponding circular third entrances 21, and the left top wall of the soil cavity 20 is provided with five circular third exits 22. The soil cavity 20 is filled with sand and gravel.

[0032] The auxiliary resting pool simulates a natural riverbed environment, providing fish with a habitat close to their natural ecology and a clear, oxygen-rich swimming space. Fish easily enter the resting pool from the third inlet 21 on the right, while the third outlet 22 on the upper left is their exit from the resting pool.

[0033] Fish enter the auxiliary resting pool through the third inlet 21, which is designed with a perforated structure to simulate the flow of natural water. The bottom of the resting pool is covered with gravel and soil, providing the fish with a habitat close to their natural environment and a clear, oxygen-rich swimming space. The third outlet 22 on the upper left is the exit for the fish to leave the resting pool. This design not only ensures the free movement of fish within the resting pool but also effectively avoids overcrowding and chaos.

[0034] The above are merely embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structures made using the contents of the present invention specification and drawings, whether directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of the present invention.

Claims

1. A vertically ascending, slit-type fishway, characterized in that, The system includes an inlet pool, which is connected to an outlet pool via a vertically ascending channel. The inlet pool has several first inlets on its wall, and the outlet pool has several first outlets on its wall. The vertically ascending channel includes several main vertically ascending channels, which are connected by ascending bends. The interior of each main channel is divided into several chambers by several first partitions, and these chambers are interconnected. The interior of each ascending bend is divided into rest areas and passageways by second partitions, and these rest areas and passageways are interconnected. Each rest area contains a main resting pool or an auxiliary resting pool, with the main resting pool used for fish. The auxiliary resting pool provides a burrowing ecological environment for fish, serving as a natural riverbed environment. The main resting pool includes a tank with a second entrance running vertically through the right side of its front wall and a second exit extending from left to right on the upper left side of its front wall. The tank is filled with sand, boulders, and aquatic plants. The auxiliary resting pool includes a box with a soil cavity inside. The soil cavity and the right side of the front wall of the box have corresponding circular third entrances, and the top left wall of the soil cavity has several circular third exits. The soil cavity is filled with sand.

2. The vertically slit-type fishway with a vertically rising structure as described in claim 1, characterized in that, The pool wall for entering the pool has three first inlets, and the pool wall for exiting the pool has three first outlets.

3. The vertically slit-type fishway with a vertically rising structure as described in claim 1 or 2, characterized in that, Several flow boosters are installed at both the first inlet and the first outlet.

4. The vertically slit-type fishway with a vertically rising structure as described in claim 3, characterized in that, The flow generator includes a base, which is connected to a disturbance via a traction rope, and the disturbance is equipped with a flow rate adjustment sensor.

5. The vertically slit-type fishway with a vertically rising structure as described in claim 4, characterized in that, The base is made of concrete or stone, the traction rope is made of steel wire, and the disturbance device is made of lightweight material.

6. The vertically slit-type fishway with a vertically rising structure as described in claim 1 or 2, characterized in that, The first partition includes large partition units and small partition units that are staggered from each other.

7. The vertically slit-type fishway with a vertically rising structure as described in claim 1 or 2, characterized in that, The vertical ascending channel is made of reinforced concrete, with a slope of 2%-6.5% for each main channel and an ascending height of 4-7m.

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