Fish crossing system

Abstract

This invention discloses a fish passage system located in a reservoir area. The disclosed fish passage system includes a fish collection channel, a fish raising tower, a breeding device, and a dam crossing channel. The fish raising tower is located on one side of the river adjacent to the reservoir dam. A portion of the fish collection channel extends into the river in a gradually decreasing manner. Another portion of the fish collection channel is located on the fish raising tower and includes multiple bends and connecting sections. Adjacent bends are connected by connecting sections, and the bends of adjacent bends are opposite in direction so that the other portion of the fish collection channel extends from the bottom of the fish raising tower to the top of the fish raising tower, and connects to one end of the dam crossing channel at the top of the fish raising tower. The other end of the dam crossing channel passes through the top of the reservoir dam and extends into the water area of ​​the reservoir. The breeding device is located in the fish raising tower, which is also equipped with a lifting device for lifting the fish bred by the breeding device to the top of the fish raising tower to assist the bred fish in entering the dam crossing channel.

Description

Technical Field

[0001] This invention relates to the field of environmental protection technology in water conservancy and hydropower engineering, and in particular to a fish passage system. Background Technology

[0002] The construction of water conservancy and hydropower projects will lead to changes in the hydrological situation of rivers. Among the more obvious changes are: once the dam is built and a reservoir is formed in the river during the construction of water conservancy and hydropower projects, the original spawning grounds, feeding grounds and overwintering grounds of fish will be submerged. It will also hinder the migration behavior of fish upstream and downstream of the dam, thus negatively impacting the quantity and diversity of fish resources, and ultimately seriously threatening the survival and reproductive capacity of fish.

[0003] To address the adverse effects of water conservancy and hydropower construction on fish, environmental protection departments, water resources management departments, and other relevant departments have required the construction companies of these projects to implement effective fish protection measures, such as fish passages and fish lifts. However, fish lifts suffer from high energy consumption, and some fish passages require large land areas. This severely restricts fish conservation efforts. Furthermore, some traditional fish transfer methods involve manual capture followed by transport via fish lifts, which causes significant damage to fish during the capture process, contradicting the principles of fish conservation. In addition, water conservancy and hydropower projects are often located in mountainous and hilly areas with limited flat terrain, making it difficult to centrally arrange traditional fish stocking stations. This hinders the coordination and connection of multiple stations, consequently affecting the survival rate of stocked fish fry. Summary of the Invention

[0004] This invention discloses a fish passage system to solve the problems of high energy consumption and large land area required for fish passage methods used after damming and reservoir construction in the background art.

[0005] To solve the above-mentioned technical problems, this application provides the following technical solution:

[0006] A fish passage system is provided in the area of ​​a reservoir. The system includes a fish collection channel, a fish raising tower, a breeding device, and a dam passage. The fish raising tower is located on one side of the river adjacent to the reservoir dam. A portion of the fish collection channel extends into the river in a gradually decreasing manner. Another portion of the fish collection channel is located on the fish raising tower and includes multiple bends and connecting sections. Adjacent bends are connected by connecting sections, and the bends of adjacent bends are opposite in direction, so that the other portion of the fish collection channel extends from the bottom of the fish raising tower to its top, and connects to one end of the dam passage at the top of the fish raising tower. The other end of the dam passage passes through the top of the reservoir dam and extends into the water area of ​​the reservoir. The breeding device is located in the fish raising tower, which is also equipped with a lifting device for lifting the fish bred by the breeding device to the top of the fish raising tower to assist the bred fish in entering the dam passage.

[0007] Optionally, in the above-mentioned fish passage system, both the fish collection channel and the dam passage include multiple fish passage pools distributed sequentially in their extension direction. An isolation section for forming a fish passage opening is provided at the junction of two adjacent fish passage pools. Two adjacent fish passage pools are connected through the fish passage opening. The bending section includes multiple fish passage pools, and the connecting section includes at least one fish passage pool.

[0008] Optionally, in the above-mentioned fish passage system, the bottom wall slope of the fish passage pool located in the connecting section is less than that of the fish passage pool located in the bending section. Specifically, the fish passage pool near the ground in the connecting section of the first floor at the bottom of the fish-raising building is a sorting pool; the fish passage pool in the connecting section of the floor at the top of the fish-raising building is a release pool; and the fish passage pools in the connecting sections of other floors between the top and bottom of the fish-raising building are resting pools. The breeding device includes a broodstock pool and a breeding workshop. The broodstock pool is located on the first floor at the bottom of the fish-raising building and is adjacent to the sorting pool. The breeding workshop is used to receive broodstock from the sorting pool and breed them. The pools included in the breeding workshop are distributed on the second and third floors of the fish-raising building. The fish passage opening between the sorting pool and one of its adjacent downstream fish passage pools is equipped with an openable and closable grid gate.

[0009] Optionally, in the above-mentioned fish passage system, the slope of the dam passage increases in the direction of the water area near the reservoir, the dam passage is equipped with a floodgate, and the area of ​​the dam passage located upstream of the floodgate has at least two fish outlets distributed at intervals.

[0010] Optionally, in the above-mentioned fish transfer system, the propagation device further includes a water purification tank and a wastewater tank. The water purification tank and the wastewater tank are located on the fourth floor of the fish-raising building. The water purification tank is connected to the broodstock tank and the breeding workshop respectively to supply purified water to the broodstock tank and the breeding workshop. The wastewater tank is connected to the broodstock tank and the breeding workshop respectively to receive wastewater discharged from the broodstock tank and the breeding workshop.

[0011] Optionally, in the above-mentioned fish passage system, the breeding device further includes a first heat exchange tank and a first heat exchange tube located on the fourth floor. The first heat exchange tube is an electrically refrigerated structural component. The first heat exchange tube is located in the sewage tank and exchanges heat with the heat exchange medium in the first heat exchange tank to drive the sewage in the sewage tank to freeze and to heat the heat exchange medium in the first heat exchange tank. The sewage tank is provided with a turning frame, which is used to turn the ice blocks in the sewage tank into the clean water tank.

[0012] Optionally, in the above-described fish transfer system, the breeding device further includes a second heat exchange tank, a second heat exchange tube, and a third heat exchange tube located on the fourth floor, and a temperature regulating tank located on the fifth floor of the fish-raising building; the second heat exchange tube and the third heat exchange tube are both electrically refrigerated structural components; the second heat exchange tube is located in the first heat exchange tank and exchanges heat with the heat exchange medium in the first heat exchange tank; the second heat exchange tube is connected to the second heat exchange tank to transport the heat exchange medium in the second heat exchange tank to exchange heat with the heat exchange medium in the first heat exchange tank; the third heat exchange tube is located in the second heat exchange tank and exchanges heat with the heat exchange medium in the second heat exchange tank; the third heat exchange tube is connected to the temperature regulating tank to transport water in the temperature regulating tank to exchange heat with the heat exchange medium in the second heat exchange tank; the freezing point of the heat exchange medium is lower than the freezing point of water.

[0013] Optionally, in the above-mentioned fish passage system, the fish passage system further includes a water replenishment device, which includes a first water replenishment pipe and a second water replenishment pipe. The first end of the first water replenishment pipe is connected to the temperature regulating tank, and the second end of the first water replenishment pipe extends toward the bottom of the fish-raising tower and replenishes water to the fish passage pool of one of the connecting sections through multiple first branch pipes. The first end of the second water replenishment pipe is connected to the temperature regulating tank, and the second end of the second water replenishment pipe extends toward the bottom of the fish-raising tower and replenishes water to the fish passage pool of another connecting section through multiple second branch pipes.

[0014] Optionally, in the above-mentioned fish passage system, the fish passage system further includes a water intake device, which includes a first water intake pipe, a second water intake pipe, and an energy storage unit. The first end of the first water intake pipe is located in the river channel, the second end of the first water intake pipe is connected to the energy storage unit, the first end of the second water intake pipe is connected to the energy storage unit, and the second end of the second water intake pipe is connected to the temperature regulating pool. The energy storage unit is used to draw water into the temperature regulating pool through the first water intake pipe and the second water intake pipe.

[0015] Optionally, in the above-mentioned fish passage system, the fish passage pool is paved with sand and gravel to form shallow and deep pool structures within the fish passage pool.

[0016] Optionally, in the above-mentioned fish passage system, the reservoir dam includes a main dam and a sand-retaining dam located inside the main dam. The water area between the main dam and the sand-retaining dam is a rewilding zone. The breeding device also includes artificial fish nests and photovoltaic equipment. The artificial fish nests float in the rewilding zone to rewild the bred fish fry. The photovoltaic equipment is installed on the artificial fish nests to generate photovoltaic power.

[0017] The fish passage system disclosed in this invention has the following technical effects:

[0018] The fish passage system disclosed in this invention, by designing the fish collection channel three-dimensionally on the fish-raising tower, allows fish in the river to gradually migrate upstream along the collection channel to the roof of the fish-raising tower. Breeding fish (parent fish) and fry are also lifted by a lifting device to the passageway, thus enabling the fish to migrate upstream. Because the fish collection channel extends in a curved manner along the height of the fish-raising tower, it avoids the problem of the collection channel occupying a large area due to its excessive length. At the same time, this method allows some fish to gradually migrate from the river to the fish collection channel located on the roof of the fish-raising tower without the need for a dedicated fish-lifting machine, thereby reducing the energy consumption of fish passage.

[0019] Since the lifting device is only responsible for lifting a portion of the parent fish after breeding and the fry produced after breeding, the lifting device does not need to lift all the fish. Therefore, compared with the traditional method of lifting all the fish in the river to the reservoir through a fish lift, the fish transfer system disclosed in this embodiment of the invention has lower energy consumption.

[0020] Because the breeding device is vertically arranged in the fish-raising tower, compared with the traditional fish breeding and release station where the ponds are scattered, the efficiency of coordination and connection of multiple ponds can be greatly improved by the lifting device, thereby improving the survival rate of the bred fish fry.

[0021] In addition, since fish can migrate upstream from the river to the dam passage through the fish collection channel, there are fewer scenarios where manual capture is required during this process, or some fish (such as non-parent fish) do not need to be captured manually. Therefore, the fish passage system disclosed in this embodiment of the invention causes less damage to the fish. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the fish passage system disclosed in an embodiment of the present invention;

[0023] Figure 2 yes Figure 1 A magnified view of a portion of the image;

[0024] Figures 3 to 11 These are partially enlarged schematic diagrams of the fish passage system disclosed in the embodiments of the present invention;

[0025] Figure 12 This is a schematic diagram of the assembled photovoltaic equipment and artificial fish nest disclosed in an embodiment of the present invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] 100-Fish collection channel, 110-Bend section, 120-Connecting section, 101-Fish passage pond, 102-Fish passage opening, 103-Isolation section, 1031-Isolation plate, 1032-Tree-like structure, 104-Shallow and deep pool structure.

[0028] 200-liter fish house,

[0029] 300-Propagation device, A-Sorting pool, B-Release pool, C-Rest pool, 310-Broodstock pool, 320-Breeding workshop, 330-Clean water pool, 340-Sewage pool, 350-First heat exchange pool, 360-First heat exchange tube, 370-Second heat exchange pool, 380-Second heat exchange tube, 390-Third heat exchange tube, 3100-Temperature regulating pool, 3110-Artificial fish nest, 3120-Photovoltaic equipment,

[0030] 400 - Dam crossing passage, 410 - Floodgate,

[0031] 500-Lifting Device

[0032] 600 - Water intake device, 610 - First water intake pipe, 620 - Second water intake pipe, 630 - Energy storage unit

[0033] 700 - Water supply device, 710 - First water supply pipe, 720 - Second water supply pipe, 730 - First branch pipe, 740 - Second branch pipe

[0034] 800 - Reservoir dam, 810 - Main dam, 820 - Sand-trapping dam. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0036] The technical solutions disclosed in the various embodiments of this application are described in detail below with reference to the accompanying drawings.

[0037] Traditional technology uses fish lifts to transport fish from downstream river channels into the reservoir, solving the problem of fish being unable to migrate to the reservoir due to dams. Traditional fish lifts are similar to elevators, each with only one fish tank (similar to an elevator car). During the fish transport process, after each transport, the fish lift's tank must return to the collection point for the next collection and transport operation. This single-tank collection method results in low transport efficiency because it cannot continuously collect fish. Furthermore, if the fish lift's tank encounters a large number of fish at the collection point, the limited space can easily lead to congestion and injuries. Some fish may also escape due to congestion (swimming in the opposite direction), further reducing transport efficiency.

[0038] Traditionally, fish are transported via fishways, but excessively long fishways in the river can take up a large area.

[0039] In order to solve at least one of the many problems existing in the traditional fish transfer method described above, this invention discloses a fish transfer system. The disclosed fish transfer system is used at least to transport fish in the downstream river channel of a reservoir to the water area of ​​the reservoir, ultimately assisting the fish migration.

[0040] Please refer to Figures 1 to 12 The fish passage system disclosed in this embodiment of the invention is located in the area where a reservoir is situated. In this embodiment, the reservoir can be formed by a dam of a hydroelectric power station located on a section of an "S"-shaped river bend within an asymmetrical U-shaped valley. The reservoir can also be formed by impounding water on other types of river channels; this embodiment does not limit the formation method of the reservoir. The disclosed fish passage system may include a fish collection channel 100, a fish lifting tower 200, a breeding device 300, and a dam passage 400.

[0041] The fish-collecting tower 200 is located on one side of the river channel adjacent to the reservoir dam. A portion (i.e., the first portion) of the fish-collecting channel 100 extends into the river channel in an inclined and gradually decreasing manner. Another portion (i.e., the second portion) of the fish-collecting channel 100 is located on the fish-collecting tower 200. Specifically, the other portion of the fish-collecting channel 100 includes multiple bends 110 and multiple connecting sections 120. Adjacent bends 110 are connected by connecting sections 120. The bends of adjacent bends 110 are opposite in direction, so that the other portion (i.e., the second portion) of the fish-collecting channel 100 extends from the bottom of the fish-collecting tower 200 to the top of the fish-collecting tower 200, and connects to one end of the dam-crossing channel 400 at the top of the fish-collecting tower 200. The other end of the dam-crossing channel 400 passes through the top of the reservoir dam and extends into the water area of ​​the reservoir. It should be noted that the other end of the dam-crossing channel 400 is located above the water area of ​​the reservoir, thus enabling fish to pass into the water area of ​​the reservoir.

[0042] In this embodiment of the invention, the first part of the fish collection channel 100 refers to a section of the fish collection channel 100 that extends obliquely into the river channel, and the second part of the fish collection channel 100 refers to the other areas of the fish collection channel 100 excluding the first part, which is essentially another section of the fish collection channel 100.

[0043] The propagation device 300 is used for fish propagation. The propagation device 300 is located in the fish-raising tower 200, which is equipped with a lifting device 500. The lifting device 500 is used to lift the fish propagated in the propagation device 300 (i.e., the parent fish and fry bred from the parent fish, as described later) to the roof of the fish-raising tower 200 to assist the propagated fish in entering the dam passage 400. The fish entering the dam passage 400 will eventually enter the reservoir waters. The lifting device 500 can be an elevator structure.

[0044] In this embodiment of the invention, the fish collection channel 100 is a trough-shaped structure, which can be formed by concrete casting or by metal structural components; this embodiment of the invention does not impose any limitations. The first part of the fish collection channel 100 extends along the extension direction of the river channel in a gradually decreasing manner, thereby achieving a smooth connection with the river channel downstream of the reservoir, which is beneficial for fish in the river channel downstream of the reservoir to enter the fish collection channel 100. For example, the slope of the first part of the fish collection channel 100 is 1:20. Specifically, the first part of the fish collection channel 100 can be a straight channel or a curved channel; this embodiment of the invention does not limit the specific shape of the first part of the fish collection channel 100. The first end of the first part of the fish collection channel 100 is close to the dam of the reservoir, and the second end of the first part of the fish collection channel 100 extends away from the dam (e.g., straight extension, curved extension, etc.). The height of the first end of the first part of the fish collection channel 100 is greater than the height of the second end of the first part of the fish collection channel 100. In a further embodiment, the first end of the first part of the fish collection channel 100 can be connected to the tailrace channel of the power station in the dam.

[0045] The first end of the first section of the fish collection channel 100 can be connected to the reservoir's spillway (i.e., the outlet of the tailrace channel), allowing a portion of the water discharged from the reservoir to flow into the first section of the fish collection channel 100 and ultimately into the river channel through the second end of the fish collection channel 100. This method creates a flowing water environment in which fish swim upstream within the fish collection channel 100, enabling fish to enter the fish collection channel 100 from the river channel and then swim upstream along the fish collection channel 100.

[0046] In this embodiment of the invention, each pair of adjacent bending segments 110 are connected by a connecting segment 120, thereby enabling another part of the fish-collecting channel 100 to gradually rise in a curved manner on the fish-raising tower 200, thus allowing the other part of the fish-collecting channel 100 to extend from the bottom to the top of the fish-raising tower 200. This structure of the fish-collecting channel 100 allows fish to enter the first part of the fish-collecting channel 100 from the river channel, and then continue to migrate upstream in the second part of the fish-collecting channel 100, eventually reaching the top of the fish-raising tower 200.

[0047] The propagation device 300 is located in the fish-raising tower 200 to breed suitable parent fish among the fish migrating upstream in the fish collection channel 100. In the specific operation process, the operator can sort the parent fish from the fish migrating upstream in the fish collection channel 100 into the propagation device 300. The remaining fish will continue to migrate along the fish collection channel 100 to the top of the fish-raising tower 200. The fish propagated by the propagation device 300 will be transported to the top of the fish-raising tower 200 by the lifting device 500 and finally enter the dam passage 400. It can be seen that the fish entering the fish collection channel 100 from the river, whether they reproduce or not, will eventually reach the top of the fish-raising tower 200 and then be transported to the water area of ​​the reservoir through the dam passage 400.

[0048] It should be noted that water can be supplied from the reservoir to the dam passage 400 and the fish collection passage 100, thereby providing a water flow environment for the fish movement in the dam passage 400 and the fish collection passage 100. Water can also be supplied from the reservoir to the roof of the fish-raising tower 200, allowing this water to enter the rooftop end of the fish collection passage 100, and then flow along the fish collection passage 100 towards the bottom of the fish-raising tower 200, enabling the fish entering the fish collection passage 100 to migrate upstream along the water flow in the fish collection passage 100. In other embodiments, the water supply facilities described later can also be used to replenish water to at least one of the fish collection passage 100 and the dam passage 400 to provide a water flow environment.

[0049] In this paper, human intervention is required to transport fish between the breeding device 300 and the lifting device 500. The lifting device 500 can directly transfer the received fish to the dam passage 400 or to the release pool B mentioned later, and then guide the fish to the dam passage 400 through the release pool B.

[0050] As described above, the fish passage system disclosed in this embodiment of the invention, through its overall structural design, constructs a fish-raising tower 200 on one side of the reservoir dam adjacent to the river channel, thus providing a foundation for the upward extension of a portion of the fish collection channel 100. Simultaneously, a portion of the fish collection channel 100 extends into the river channel in a gradually decreasing manner. Furthermore, a breeding device 300 and a lifting device 500 are installed within the fish-raising tower 200. This type of fish passage system allows a portion of the fish collection channel 100 to be designed to extend upwards from the fish-raising tower 200. The structure, which bends and extends from the bottom to the top of the fish-raising tower 200, allows fish migrating upstream in the river to enter the fish-collecting channel 100 and swim upstream along the fish-collecting channel 100 to the top of the fish-raising tower 200. Finally, they enter the reservoir through the dam passage 400. At the same time, parent fish can be selected from the fish in the fish-collecting channel 100 for breeding in the breeding device 300. The parent fish and the bred fry can be transported to the top of the tower by the lifting device 500 and finally enter the reservoir through the dam passage 400.

[0051] As described above, the fish passage system disclosed in this embodiment of the invention integrates the fish collection channel 100 three-dimensionally onto the fish-lifting tower 200. This allows fish in the river to gradually migrate upstream along the fish collection channel 100 to the top of the fish-lifting tower 200, while broodstock and fry are lifted by the lifting device 500 to the dam passage 400, thus enabling upstream migration of fish. Because the fish collection channel 100 extends in a curved manner along the height of the fish-lifting tower 200, it avoids the problem of the fish collection channel 100 occupying a large area due to its excessive length. Simultaneously, this method allows some fish to gradually migrate from the river to the fish collection channel 100 located on the top of the fish-lifting tower 200, eliminating the need for a dedicated fish-lifting machine (i.e., eliminating the need for a fish-lifting machine to lift all fish), thereby reducing energy consumption for fish passage.

[0052] It should be noted that since the lifting device 500 is only responsible for lifting a portion of the parent fish after breeding and the fry produced after breeding, the lifting device 500 does not need to lift all the fish. Therefore, compared with the traditional method of lifting all the fish in the river to the reservoir through the lifting device 500, the fish passage system disclosed in this embodiment of the invention has lower energy consumption.

[0053] In addition, since fish can migrate upstream from the river to the dam passage 400 through the fish collection channel 100, there are fewer scenarios where manual capture is required during this process, or some fish (such as non-parent fish) do not need to be captured manually. Therefore, the fish passage system disclosed in this embodiment of the invention causes less damage to the fish.

[0054] In this embodiment of the invention, both the fish collection channel 100 and the dam passage 400 may include multiple fish passage pools 101 arranged sequentially in their extending direction. An isolation section 103 for forming a fish passage opening 102 may be provided at the junction of two adjacent fish passage pools 101. Two adjacent fish passage pools 101 are connected through the fish passage opening 102 between them. During the upstream migration of fish through the fish collection channel 100, they will gradually swim upwards along the fish collection channel 100 (i.e., towards the top of the fish-raising tower 200). Since the fish collection channel 100 extends all the way to the dam passage 400, it can avoid the crowding damage caused by fish concentrating too much and swimming only into a single fish tank as described in the background art. This structure of the fish collection channel 100 can also form a pool (i.e., a fish passage pool 101), which is beneficial for fish to rest during their upstream migration and also helps to mimic the structure of natural river channels, thus benefiting the survival of the fish.

[0055] It should be noted that, in this embodiment of the invention, the lateral dimension of the fish passage 102 is smaller than the lateral dimension of the fish passage pool 101. The lateral dimension refers to the width of the fish passage 102 or the fish passage pool 101 in the direction perpendicular to the extension of the fish collection channel 100, and is also perpendicular to the depth of the fish passage pool 101. This structure increases the flow velocity of the water flowing in the fish collection channel 100 at the fish passage 102, which is beneficial for creating the characteristic of fish following the current during migration, ultimately facilitating the upstream migration of fish in the fish collection channel 100, and thus simplifying fish collection operations.

[0056] In other embodiments, the fish collection channel 100 may not divide the fish passage pools 101 by the isolation section 103. However, in this case, the fish collection channel 100 does not have a place conducive to fish resting. As mentioned above, an isolation section 103 is provided between two adjacent fish passage pools 101 to form a fish passage opening 102. The isolation section 103 makes the connection between the two fish passage pools 101 form a fish passage opening 102 with a width smaller than the width of the fish passage pool 101, thereby increasing the water flow rate in the fish collection channel 100 and creating an environment conducive to fish swimming upstream. In this embodiment of the invention, the isolation section 103 may be a single flat plate. In other embodiments, the isolation section 103 may include an isolation plate 1031 and a tree structure 1032. The isolation plate 1031 is fixed on one side of the connection between two adjacent fish passage pools 101. The tree structure 1032 is provided on the other side of the connection between two adjacent fish passage pools 101. The fish passage opening 102 is formed between the isolation plate 1031 and the tree structure 1032. The edge of the fish passage 102 formed by the partition plate 1031 has a beveled surface to increase the opening of the fish passage 102. This structure not only facilitates the passage of fish through the fish passage 102, but also allows the fish to smoothly contact the surface of the tree-like structure 1032 and the beveled surface of the partition plate 1031 during the passage, thus avoiding damage to the fish. The beveled surface can form an acute angle with the extension direction of the fish collection channel 100, for example, 45°. At the same time, the tree-like structure 1032 is conducive to creating a turbulent water environment, which is beneficial to the upstream migration of fish.

[0057] This invention does not limit the number of fish passage pools 101 included in the fish collection channel 100. For example, the fish collection channel 100 may include 24 fish passage pools 101, or it may include 30 fish passage pools 101. Each fish passage pool 101 may be rectangular or cubic in shape. This invention does not limit the specific shape of the fish passage pool 101. In one embodiment, the space formed by a single fish passage pool 101 may be 3.2m long, 2.5m wide, and 2m high. When the fish collection channel 100 is made of concrete, the wall thickness of the fish passage pool 101 may be 0.5m. The size of the fish passage pool 101 can be determined based on three times the body height of the fish combined with the safety freeboard. The length of the fish passage pool 101 can be determined based on 2.5 times the body length of the fish combined with the energy dissipation distance. This invention does not limit the specific size of the fish passage pool 101. Those skilled in the art can design the specifications of the fish passage pool 101 based on the average size of fish in the river (which can be determined through daily sampling).

[0058] To facilitate fish entering the fish collection channel 100 from the river and continuing to swim upstream along the fish collection channel 100, the fish passage system disclosed in this embodiment of the invention may also include multiple bubble curtain generators. Bubble curtain generators may be arranged at intervals in the fish collection channel 100 or the dam passage 400. When working, the bubble curtain generators can release bubble curtains into the water of the fish collection channel 100 or the dam passage 400. The bubble curtains can drive the fish to swim, which is conducive to the fish migrating upstream more efficiently.

[0059] In this embodiment of the invention, the bottom wall of the fish passage 101 can be a planar structure. In other embodiments, the fish passage 101 can be paved with sand and gravel to form shallow and deep pool structures 104 within the fish passage 101. This structure can mimic the bottom of a natural river channel, thereby making the fish more adapted to the environment within the fish passage 100 when flowing through it.

[0060] The embodiments of the present invention do not limit the number of fish passage pools 101 included in the bending section 110 and the connecting section 120. In one embodiment, the bending section 110 may include multiple fish passage pools 101, and the connecting section 120 may include at least one fish passage pool 101, thereby enabling the bending section 110 and the connecting section 120 to allow fish to catch their breath when passing through.

[0061] The connecting section 120 is essentially a bend in the fish-collecting channel 100 located within another part of the fish-raising tower 200 structure. To facilitate the fish's upstream migration and turning within the fish-collecting channel 100, in one embodiment, the bottom slope of the fish passage pool 101 located in the connecting section 120 can be less than the bottom slope of the fish passage pool 101 located in the bend section 110. This method helps reduce the difficulty for fish when turning between two adjacent bend sections 110. Furthermore, the bottom wall of the fish passage pool 101 located in the connecting section 120 can be a horizontal bottom wall.

[0062] In this embodiment of the invention, at least the bending section 110 needs to be inclined between the bending section 110 and the connecting section 120, so that the fish collection channel 100 gradually extends from the bottom of the fish-raising tower 200 to the top of the fish-raising tower 200. This embodiment of the invention does not limit the specific inclination angle of the bending section 110 relative to the vertical direction, as long as it can meet the requirement that the fish can swim upstream normally.

[0063] Traditional aquaculture facilities rely heavily on manual capture of parent fish, resulting in low harvesting efficiency, difficulty in catching bottom-dwelling fish, and potential damage to the fish during the harvesting process. Some aquaculture facilities in hydropower projects primarily breed cold-water fish, and the water temperature of the associated circulating water systems is often insufficient to meet the reproductive requirements of these fish. Traditional aquaculture facilities also generate high levels of wastewater with limited treatment capacity, leading to significant water consumption. Furthermore, some hydropower projects' aquaculture facilities are located in areas meeting Class II water quality standards, meaning that treated wastewater from these facilities must not be discharged into rivers. Due to the large volume of wastewater, end-of-pipe treatment is costly.

[0064] As described above, the propagation device 300 is located in the fish-raising tower 200. The propagation device 300 disclosed in this embodiment of the invention may include a sorting pool A, a release pool B, a resting pool C, a broodstock pool 310, and a breeding workshop 320.

[0065] The fish passage pool 101 near the ground in the connecting section 120 of the first floor at the bottom of the fish-raising tower 200 can serve as sorting pool A. In other words, the lower fish passage pool 101 in the connecting section 120 of the first floor at the bottom of the fish-raising tower 200 can serve as sorting pool A. Sorting pool A is used by operators to sort broodstock suitable for breeding. Operators select broodstock from the fish migrating upstream in the fish collection channel 100 and use these broodstock for subsequent breeding operations. Other fish continue to move upstream along the fish collection channel 100 and eventually flow into the reservoir waters through the dam passage 400.

[0066] The broodstock pool 310 is used to temporarily store broodstock. In this embodiment of the invention, the broodstock pool 310 is located on the first floor at the bottom of the fish-raising tower 200 and is adjacent to the sorting pool A. This arrangement facilitates operators in sorting broodstock from the sorting pool A into the broodstock pool 310.

[0067] The fish passage pool 101 in the connecting section 120 at the top of the fish-raising building 200 can be a release pool B. The release pool B is a pool used to release fish into the dam passage 400. The parent fish in the breeding device 300 and the fry produced after breeding can be transported to the release pool B by the lifting device 500, and finally enter the water area of ​​the reservoir through the dam passage 400 via the release pool B.

[0068] The fish passage pool 101 in the connecting section 120 between the top and bottom of the fish tower 200 can be a resting pool C. Specifically, the bottom wall of the fish passage pool 101 in the connecting section 120 between the top and bottom of the fish tower 200 has a smaller inclination angle. Compared with the fish passage pool 101 in the bend section 110 between the top and bottom of the fish tower 200, the fish passage pool 101 with a smaller bottom wall inclination angle is more conducive to the fish resting, and thus can better ensure that the fish can migrate upstream.

[0069] The breeding workshop 320 is used to receive parent fish from sorting pool A and to breed them. The pools contained in the breeding workshop 320 can be distributed on the second and third floors of the fish-raising building 200.

[0070] In this embodiment of the invention, the lifting device 500 is installed on the fish-lifting tower 200. The lifting device 500 is similar to an elevator. Operators manually catch fish and use the lifting device 500 to vertically transport parent fish and fry between different floors of the fish-lifting tower 200. It should be noted that the fish transported by the lifting device 500 are not all fish entering the fish collection channel 100, but only the parent fish selected for breeding and the fry produced after their reproduction. Therefore, although this structure involves manual fishing and transportation by the lifting device 500, compared to the prior art method where all fish need to be lifted by a fish lift, the energy consumption of the fish-passing system disclosed in this application embodiment is relatively low. This structure eliminates the need for manual catching of all fish; only parent fish and fry need to be manually caught and transported between different ponds. This reduces labor costs and fish damage caused by manual fishing.

[0071] Meanwhile, this type of breeding device 300 can fully utilize part of the fish passage 101 in the fish collection channel 100 as the sorting pool A and the release pool B of the breeding device 300, which simplifies the structure of the breeding device 300 and also gives the fish collection channel 100 more functions. In addition, by using the fish passage 101 in the connecting section 120 between the top and bottom of the fish ascending tower 200 as the resting pool C, the fish can rest more fully in the fish collection channel 100, which is beneficial to the fish's upstream migration in the fish collection channel 100.

[0072] To facilitate thorough sorting of the parent fish and prevent some from swimming away before being sorted out, in a further embodiment, the fish passage 102 between sorting pool A and an adjacent downstream fish passage pool 101 can be equipped with an openable and closable grid gate. During the sorting process, the operator can close the grid gate, which does not affect the downstream flow of water in the fish collection channel 100, while still allowing the fish to be gathered in sorting pool A for thorough sorting. After sorting, the grid gate can be opened, allowing fish that do not meet the breeding conditions to continue swimming upstream.

[0073] To facilitate fish entry into the reservoir's waters under varying water levels, in this embodiment of the invention, the height of the dam passage 400 increases progressively towards the reservoir. The dam passage 400 may be equipped with a floodgate 410, and at least two fish outlets are spaced apart in the area upstream of the floodgate 410. This structure improves the adaptability of the dam passage 400 to different water level fluctuations, thereby increasing the efficiency of fish passage.

[0074] In a further embodiment, the propagation device 300 disclosed in this invention may further include a water purification tank 330 and a wastewater tank 340, which may be located on the fourth floor of the fish-raising building 200. The water purification tank 330 may be connected to the broodstock tank 310 and the breeding workshop 320 respectively, to supply purified water to the broodstock tank 310 and the breeding workshop 320 respectively. The wastewater tank 340 may be connected to the broodstock tank 310 and the breeding workshop 320 respectively, to receive wastewater discharged from the broodstock tank 310 and the breeding workshop 320.

[0075] In this structure, the broodstock pond 310 and the breeding workshop 320 are connected in parallel between the water purification pond 330 and the wastewater pond 340, ultimately enabling the input of purified water and the discharge of wastewater, which is beneficial to the survival and temporary storage of fish in these ponds. Specifically, corresponding connecting pipelines and pumps can be configured on the pipelines to drive the input of purified water and the discharge of wastewater. This embodiment of the invention does not limit the specific connection method between the wastewater pond 340 and the broodstock pond 310 and the breeding workshop 320, nor does it limit the specific connection method between the water purification pond 330 and the broodstock pond 310 and the breeding workshop 320. This structure enables the renewal of water in the broodstock pond 310 and the breeding workshop 320.

[0076] The amplification device 300 disclosed in this embodiment of the invention may further include a first heat exchange tank 350 and a first heat exchange tube 360, which are located on the fourth floor. The first heat exchange tube 360 ​​may be a semiconductor structure. The first heat exchange tube 360 ​​is located within a wastewater tank 340 and exchanges heat with the heat exchange medium in the first heat exchange tank 350 to drive the wastewater in the wastewater tank 340 to freeze and to heat the heat exchange medium in the first heat exchange tank 350.

[0077] A tilting frame, a porous sieve plate, is installed inside the sewage tank 340 to turn ice blocks from the sewage tank 340 into the clean water tank 330. The tilting frame can be connected to a tilting frame drive mechanism, which drives the tilting frame to tilt, allowing it to sink to the bottom of the sewage tank 340 and to tilt above the clean water tank 330. Specifically, when the tilting frame tilts to the bottom of the sewage tank 340, its supporting surface can face vertically upwards. When the tilting frame tilts to the top of the clean water tank 330, its supporting surface can face vertically downwards.

[0078] In this embodiment of the invention, the first heat exchange tube 360 ​​is an electro-refrigeration structural component. The inner wall of the first heat exchange tube 360 ​​is the heating side of the electro-refrigeration structural component, and the outer wall of the first heat exchange tube 360 ​​is the cooling side of the electro-refrigeration structural component. In one embodiment, the first heat exchange tube 360 ​​can be a sandwich structure, which may include an inner metal layer, a semiconductor layer, and an outer metal layer. The inner and outer metal layers can be copper layers. The semiconductor layer utilizes the Peltier effect to achieve cooling on one side and heating on the other side. To improve heat exchange capacity, the first heat exchange tube 360 ​​can be a serpentine tube. The first heat exchange tube 360 ​​can be connected to a heat exchange medium delivery pump, which enables efficient delivery of the heat exchange medium.

[0079] To improve the cooling effect, the breeding device 300 disclosed in this embodiment of the invention may further include a second heat exchange tank 370, a second heat exchange tube 380, a third heat exchange tube 390, and a temperature regulating tank 3100. The second heat exchange tank 370, the second heat exchange tube 380, and the third heat exchange tube 390 may be located on the fourth floor of the fish-raising building 200, and the temperature regulating tank 3100 may be located on the fifth floor of the fish-raising building 200.

[0080] In this embodiment of the invention, both the second heat exchange tube 380 and the third heat exchange tube 390 are electrically refrigerated structural components. Similarly, both the second heat exchange tube 380 and the third heat exchange tube 390 can be sandwich structures, each including an inner metal layer, a semiconductor layer, and an outer metal layer, wherein the inner and outer metal layers can be copper layers. The semiconductor layer utilizes the Peltier effect to achieve cooling on one side and heating on the other. To improve heat exchange capacity, the second heat exchange tube 380 and the third heat exchange tube 390 can be serpentine tubes. The second heat exchange tube 380 and the third heat exchange tube 390 can each be connected to a heat exchange medium delivery pump, enabling efficient delivery of the heat exchange medium.

[0081] The second heat exchange tube 380 is located in the first heat exchange pool 350 and exchanges heat with the heat exchange medium in the first heat exchange pool 350. The second heat exchange tube 380 is connected to the second heat exchange pool 370 to transport the heat exchange medium in the second heat exchange pool 370 to exchange heat with the heat exchange medium in the first heat exchange pool 350, thereby driving the heat exchange medium in the second heat exchange pool 370 to heat up and driving the heat exchange medium in the first heat exchange pool 350 to cool down.

[0082] The third heat exchange tube 390 is located in the second heat exchange pool 370 and exchanges heat with the heat exchange medium in the second heat exchange pool 370. The third heat exchange tube 390 is connected to the temperature regulating pool 3100 to transport the heat exchange medium in the temperature regulating pool 3100 to exchange heat with the heat exchange medium in the second heat exchange pool 370, thereby driving the heat exchange medium in the temperature regulating pool 3100 to heat up and driving the heat exchange medium in the second heat exchange pool 370 to cool down. The freezing point of the heat exchange medium in the first heat exchange pool 350 and the second heat exchange pool 370 is lower than the freezing point of water.

[0083] In the specific operation process, the first heat exchange tube 360, located in the sewage tank 340 and energized, can heat the heat exchange medium in the first heat exchange tank 350 and cool the sewage in the sewage tank 340. Simultaneously, the second heat exchange tube 380, located in the first heat exchange tank 350 and energized, can heat the heat exchange medium in the second heat exchange tank 370 and cool the heat exchange medium in the first heat exchange tank 350. The third heat exchange tube 390, located in the second heat exchange tank 370 and energized, can heat the heat exchange medium in the second heat exchange tank 370. The heat exchange medium is cooled and the heat exchange medium in the temperature regulating tank 3100 is heated. In this case, the first heat exchange tube 360, the second heat exchange tube 380 and the third heat exchange tube 390 can sequentially output the heat in the sewage tank 340, which will eventually make the sewage in the sewage tank 340 freeze better, thereby increasing the temperature of the heat exchange medium in the first heat exchange tank 350, and at the same time, increasing the temperature of the heat exchange medium in the second heat exchange tank 370, and further increasing the temperature of the heat exchange medium in the temperature regulating tank 3100. For insoluble waste (such as fish excrement) in the sewage tank, which is heavier, it slowly sinks to the bottom of the tank, while the water in the sewage will freeze into ice and float. At the same time, for soluble waste in the sewage tank, due to the freezing and concentration effect, the waste will be excluded from the ice crystals during the freezing process, and the pure water will freeze into ice and float. This process is essentially sewage treatment. The water that freezes into ice is relatively clean because it is separated from the waste. When the ice reaches a preset volume, the tilting frame drive mechanism can be controlled to tilt the tilting frame to tilt and transport the ice to the top of the clean water tank 330, so that the ice falls into the clean water tank 330, thereby replenishing the clean water tank 330 with water.

[0084] The frozen ice melts in the purification tank 330, forming cooler purified water, which is then transported to the broodstock tank 310 and the breeding workshop 320. This cooler water is suitable for the breeding of cold-water fish. As can be seen from the above process, this structure can extract purified water from wastewater, allowing for the reuse of most of the water (since wastewater is primarily water), thus reducing the daily water consumption of the breeding device 300. Furthermore, it eliminates the need for numerous cooling tanks as described in related technologies, reducing the footprint of the breeding device 300. Since purified water can be extracted from wastewater, it essentially achieves preliminary wastewater treatment, reducing the amount of wastewater generated. Even if wastewater needs to be discharged, only a small portion of the remaining wastewater after the purified water has been extracted is treated, reducing the complexity of the treatment process.

[0085] Therefore, a sewage pipe can be installed at the bottom of the sewage tank 340. Except for frozen sewage, which can be periodically discharged into transport vehicles through the sewage pipe, a small amount of sewage can be transported away. This method avoids the problem of high end-of-pipe treatment costs due to large sewage volumes.

[0086] Furthermore, this method eliminates the need for costly treatment methods such as adsorption, membrane treatment, electroosmosis, and advanced oxidation, thus reducing wastewater treatment costs. It is important to emphasize that the fish passage system disclosed in this embodiment of the invention can simultaneously facilitate fish passage, fish propagation, wastewater treatment of the propagation device 300, and the supply of low-temperature water, achieving a comprehensive and balanced effect.

[0087] The heat exchange medium in the first heat exchange pool 350 can be water or other fluids, as it is located close to the lower-temperature sewage pool 340. To facilitate better flow of the heat exchange medium within the first heat exchange pool 350 along the first heat exchange tube 360 ​​and its heat exchange with the sewage in the sewage pool 340, in one embodiment, the heat exchange medium in the first heat exchange pool 350 can be a mixture of water and ethanol, with a water-to-ethanol volume ratio of 7:3. This type of heat exchange medium is less prone to cooling, thus ensuring good fluidity during the heat exchange process. In this embodiment, the heat exchange medium in the first heat exchange pool 350 can be reused repeatedly. To avoid external interference, the first heat exchange pool 350 can be a closed pool.

[0088] Similarly, the heat exchange medium in the second heat exchange pool 370 can also be water or other fluids, for example, the heat exchange medium in the second heat exchange pool 370 can be the same as the heat exchange medium in the first heat exchange pool 350. Of course, since the second heat exchange pool 370 does not directly exchange heat with the sewage in the lower-temperature sewage pool 340, and the heat exchange medium in the second heat exchange pool 370 also exchanges heat with the heat exchange medium in the first heat exchange pool 350, the temperature of the heat exchange medium in the second heat exchange pool 370 is relatively high, so it is not easy to solidify and has good fluidity.

[0089] Similarly, the heat exchange medium in the temperature regulating tank 3100 can be water or other fluids, such as the same heat exchange medium in the temperature regulating tank 3100 as in the first heat exchange tank 350. Of course, since the temperature regulating tank 3100 does not directly exchange heat with the sewage in the lower-temperature sewage tank 340, the temperature of the heat exchange medium in the temperature regulating tank 3100 is relatively high, and therefore it is not easy to solidify and has good fluidity.

[0090] In one embodiment, the heat exchange medium in the temperature regulating tank 3100 can be water, and after heat exchange, the temperature of the heat exchange medium in the temperature regulating tank 3100 is the highest. In this embodiment of the invention, when the heat exchange medium in the temperature regulating tank 3100 is water, the water in the temperature regulating tank 3100 can originate from the tailwater of the hydropower station in the reservoir.

[0091] Based on this, in one embodiment, the fish passage system disclosed in this invention may further include a water replenishment device 700. The water replenishment device 700 may include a first water replenishment pipe 710 and a second water replenishment pipe 720. The first end of the first water replenishment pipe 710 is connected to the temperature regulating tank 3100, and the second end of the first water replenishment pipe 710 extends toward the bottom of the fish-raising tower 200 and replenishes water to the fish passage pool 101 of a connecting section 120 through a plurality of first branch pipes 730. The first end of the second water replenishment pipe 720 is connected to the temperature regulating tank 3100, and the second end of the second water replenishment pipe 720 extends toward the bottom of the fish-raising tower 200 and replenishes water to the fish passage pool 101 of another connecting section 120 through a plurality of second branch pipes 740. Of course, in other embodiments, the water replenishment device 700 may include only the first water replenishment pipe 710 or only the second water replenishment pipe 720.

[0092] Both the first water supply pipe 710 and the second water supply pipe 720 can be equipped with water supply pumps. These pumps transport warmer water from the temperature regulating tank 3100 to either the first or second water supply pipe 710, thus replenishing the fish collection channel 100 with warmer water. This warmer water not only easily creates a flowing environment conducive to fish upstream migration but also ensures that the fish collection channel 100 contains warmer water. This is beneficial for the fish's tendency to follow the current and temperature changes during swimming, further facilitating their upstream migration within the fish collection channel 100. Alternatively, water supply pumps can be omitted from the first and second water supply pipes 710 and 720. Water in the temperature regulating tank 3100 can flow towards the bottom of the fish-raising tower 200 under gravity after the corresponding valves on the first and second water supply pipes 710 and 720 are opened, thus achieving water replenishment.

[0093] After the water in the temperature regulating tank 3100 is discharged through water replenishment, water can be drawn into the temperature regulating tank 3100. Based on this, the fish passage system disclosed in this embodiment of the invention may also include a water drawing device 600, which may include a first water drawing pipe 610, a second water drawing pipe 620, and an energy storage unit 630.

[0094] The first end of the first water intake pipe 610 is located in the river channel, and the second end of the first water intake pipe 610 is connected to the energy storage unit 630. The first end of the second water intake pipe 620 is connected to the energy storage unit 630, and the second end of the second water intake pipe 620 is connected to the temperature regulating reservoir 3100. The energy storage unit 630 is used to draw water into the temperature regulating reservoir 3100 through the first water intake pipe 610 and the second water intake pipe 620. In the specific operation process, the tailwater of the hydropower station in the reservoir can enter the first water intake pipe 610 and the energy storage unit 630, and under the drive of the energy storage unit 630, enter the temperature regulating reservoir 3100 through the second water intake pipe 620, thereby realizing the water intake of the temperature regulating reservoir 3100.

[0095] In this embodiment of the invention, the tailwater of the reservoir can be diverted through the energy storage unit 630 to drive the energy storage unit 630 to generate electricity. This allows the energy storage unit 630 to store electrical energy, which, during the water diversion operation, drives a portion of the tailwater to be diverted sequentially through the first water inlet pipe 610 and the second water inlet pipe 620 into the temperature regulating pool 3100. This method fully utilizes a portion of the tailwater's kinetic energy to convert it into electrical energy for storage in the energy storage unit 630, thus preparing for subsequent water diversion. It should be noted that the ability of the energy storage unit 630 to generate electricity and utilize its own generated electricity as a power source are well-known technologies, and will not be elaborated upon further in this embodiment of the invention.

[0096] Multiple first branch pipes 730 and multiple second branch pipes 740 can be equipped with flow control devices, so that when multiple branch pipes replenish water at multiple points, different water flow environments can be created at different locations in the fish collection channel 100, which can adapt to different types of fish and fish of different body lengths, and ultimately facilitate the upstream migration of fish.

[0097] To improve heat exchange efficiency, in one embodiment, a stirring device can be provided in the first heat exchange pool 350, the second heat exchange pool 370, and the temperature regulating pool 3100. The stirring device achieves more efficient heat exchange by stirring the heat exchange medium in the first heat exchange pool 350, the second heat exchange pool 370, and the temperature regulating pool 3100.

[0098] In the fish passage system disclosed in this embodiment of the invention, the reservoir dam 800 may include a main dam 810 and a sand-retaining dam 820 located inside the main dam 810. The water area between the main dam 810 and the sand-retaining dam 820 is a rewilding zone. The breeding device 300 may further include an artificial fish nest 3110 and a photovoltaic device 3120. The artificial fish nest 3110 floats in the rewilding zone for rewilding the bred fish fry, and the photovoltaic device 3120 is installed on the artificial fish nest 3110 to generate photovoltaic power. The photovoltaic device 3120 generates power to supply power to the electrical components in the fish passage system.

[0099] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A fish passage system, installed in the area of ​​a reservoir, characterized in that, The fish passage system includes a fish collection channel (100), a fish-raising tower (200), a breeding device (300), and a dam passage (400). The fish-raising tower (200) is located on one side of the river channel adjacent to the reservoir dam. A portion of the fish collection channel (100) extends into the river channel in a gradually decreasing manner. Another portion of the fish collection channel (100) is located on the fish-raising tower (200) and includes multiple bends (110) and multiple connecting sections (120). Two adjacent bends (110) are connected by the connecting sections (120), and the bend directions of two adjacent bends (110) are opposite. Conversely, this allows another part of the fish collection channel (100) to extend from the bottom of the fish-raising tower (200) to the top of the fish-raising tower (200), and to connect with one end of the dam-crossing channel (400) at the top of the fish-raising tower (200). The other end of the dam-crossing channel (400) passes through the top of the reservoir dam and extends into the water area of ​​the reservoir. The breeding device (300) is located in the fish-raising tower (200), and the fish-raising tower (200) is also equipped with a lifting device (500). The lifting device (500) is used to lift the fish bred by the breeding device (300) to the fish-raising tower. Fish assisted in breeding enter the dam passage (400) from the rooftop of the building (200). Both the fish collection passage (100) and the dam passage (400) include multiple fish passage pools (101) arranged sequentially in their extending direction. An isolation section (103) for forming a fish passage opening (102) is provided at the junction of two adjacent fish passage pools (101). Two adjacent fish passage pools (101) are connected through the fish passage opening (102). The bending section (110) includes multiple fish passage pools (101). The connecting section (120) includes at least one fish passage pool (101). The connecting section (120) is located at the junction of the two fish passage pools (110 and 120). The bottom wall slope of the fish passage pool (101) in 0) is less than that of the fish passage pool (101) in the bend section (110). The fish passage pool (101) near the ground in the connecting section (120) of the first floor at the bottom of the fish tower (200) is a sorting pool (A). The fish passage pool (101) in the connecting section (120) of the floor at the top of the fish tower (200) is a discharge pool (B). The fish passage pool (101) in the connecting section (120) of other floors between the top and bottom of the fish tower (200) is a resting pool (C).The breeding device (300) includes a broodstock pond (310) and a breeding workshop (320). The broodstock pond (310) is located on the first floor at the bottom of the fish-raising tower (200) and is adjacent to the sorting pond (A). The breeding workshop (320) is used to receive broodstock from the sorting pond (A) and breed them. The ponds included in the breeding workshop (320) are distributed on the second and third floors of the fish-raising tower (200). The fish passage (102) between the sorting pond (A) and an adjacent downstream fish passage (101) is equipped with an openable and closable grid gate. The dam passage (400) increases in height in the direction of the water area near the reservoir. The dam passage (400) is equipped with a floodgate (410). The area of ​​the dam passage (400) upstream of the floodgate (410) has at least two fish outlets spaced apart.

2. The fish passage system according to claim 1, characterized in that, The breeding device (300) further includes a water purification tank (330) and a sewage tank (340). The water purification tank (330) and the sewage tank (340) are located on the fourth floor of the fish-raising building (200). The water purification tank (330) is connected to the parent fish pond (310) and the breeding workshop (320) respectively to supply purified water to the parent fish pond (310) and the breeding workshop (320). The sewage tank (340) is connected to the parent fish pond (310) and the breeding workshop (320) respectively to receive sewage discharged from the parent fish pond (310) and the breeding workshop (320).

3. The fish passage system according to claim 2, characterized in that, The amplification device (300) further includes a first heat exchange tank (350) and a first heat exchange tube (360) located on the fourth floor. The first heat exchange tube (360) is an electrically refrigerated structural component. The first heat exchange tube (360) is located in the sewage tank (340) and exchanges heat with the heat exchange medium in the first heat exchange tank (350) to drive the sewage in the sewage tank (340) to freeze and to heat the heat exchange medium in the first heat exchange tank (350). The sewage tank (340) is provided with a turning frame, which is used to turn the ice in the sewage tank (340) into the clean water tank (330).

4. The fish passage system according to claim 3, characterized in that, The breeding device (300) further includes a second heat exchange tank (370), a second heat exchange tube (380), and a third heat exchange tube (390) located on the fourth floor, and a temperature regulating tank (3100) located on the fifth floor of the fish-raising tower (200); the second heat exchange tube (380) and the third heat exchange tube (390) are both electrically refrigerated structural components. The second heat exchange tube (380) is located in the first heat exchange tank (350) and exchanges heat with the heat exchange medium in the first heat exchange tank (350). The second heat exchange tube (380) and the second A heat exchange pool (370) is connected to transport the heat exchange medium in the second heat exchange pool (370) to exchange heat with the heat exchange medium in the first heat exchange pool (350); the third heat exchange tube (390) is located in the second heat exchange pool (370) and exchanges heat with the heat exchange medium in the second heat exchange pool (370), the third heat exchange tube (390) is connected to the temperature regulating pool (3100) to transport water in the temperature regulating pool (3100) to exchange heat with the heat exchange medium in the second heat exchange pool (370), the freezing point of the heat exchange medium is lower than the freezing point of water.

5. The fish passage system according to claim 4, characterized in that, The fish passage system also includes a water replenishment device (700), which includes a first water replenishment pipe (710) and a second water replenishment pipe (720). The first end of the first water replenishment pipe (710) is connected to the temperature regulating pool (3100), and the second end of the first water replenishment pipe (710) extends toward the bottom of the fish-raising tower (200) and replenishes water to the fish passage pool (101) of one of the connecting sections (120) through multiple first branch pipes (730). The first end of the second water replenishment pipe (720) is connected to the temperature regulating pool (3100), and the second end of the second water replenishment pipe (720) extends toward the bottom of the fish-raising tower (200) and replenishes water to the fish passage pool (101) of another connecting section (120) through multiple second branch pipes (740).

6. The fish passage system according to claim 4, characterized in that, The fish passage system also includes a water intake device (600), which includes a first water intake pipe (610), a second water intake pipe (620), and an energy storage unit (630). The first end of the first water intake pipe (610) is located in the river channel, and the second end of the first water intake pipe (610) is connected to the energy storage unit (630). The first end of the second water intake pipe (620) is connected to the energy storage unit (630), and the second end of the second water intake pipe (620) is connected to the temperature regulating pool (3100). The energy storage unit (630) is used to draw water into the temperature regulating pool (3100) through the first water intake pipe (610) and the second water intake pipe (620).

7. The fish passage system according to claim 1, characterized in that, The fish passage pool (101) is paved with sand and gravel to form shallow and deep pool structures (104) within the fish passage pool (101).

8. The fish passage system according to claim 1, characterized in that, The reservoir dam (800) includes a main dam (810) and a sand-blocking dam (820) located inside the main dam (810). The water area between the main dam (810) and the sand-blocking dam (820) is a wilding zone. The breeding device (300) also includes an artificial fish nest (3110) and a photovoltaic device (3120). The artificial fish nest (3110) floats in the wilding zone to wild the bred fish fry. The photovoltaic device (3120) is installed on the artificial fish nest (3110) to generate photovoltaic power.

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