Device and method for promoting fish spawning in lake wetland

Abstract

The invention discloses a device and method for promoting fish spawning in a lake wetland. The device comprises a flow guide and water retaining assembly, a wind power flow increasing assembly and a fish spawning reef. The flow guiding and water retaining assembly comprises a first flow guiding and water retaining wall plate and a second flow guiding and water retaining wall plate. The first flow guide and water retaining wall plate and the second flow guide and water retaining wall plate are symmetrically arranged in the wetland along the water flow direction, and a flow guide channel is formed between the first flow guide and water retaining wall plate and the second flow guide and water retaining wall plate; the wind power flow increasing assembly is located in a flow guiding channel between the first flow guiding and water retaining wall plate and the second flow guiding and water retaining wall plate. In the water flow direction, the fish spawning reef is located in front of the flow guiding and water retaining assembly. Through the design of the flow guiding and water retaining assembly, the wind power flow increasing assembly and the fish spawning reef, the water flow velocity of the lake wetland is increased through wind power, a proper spawning environment is provided for fishes, the fishes needing to be stimulated to breed by the water flow are successfully promoted to spawn smoothly, the practicability is high, and the method is simple, convenient and easy to implement.

Description

Technical Field

[0001] The invention relates to the field of ecological restoration and fishery resource protection, and in particular to a device and method for promoting spawning of fish in lake wetlands. Background Art

[0002] With the rapid development of urbanization and industrialization in my country, water ecological environment pollution and functional degradation are becoming increasingly prominent. Wetlands can use natural ecosystems to improve water quality, restore the ecological environment, and provide diverse ecological services. They are economically effective, eco-friendly, highly adaptable, and easy to operate and maintain, and can produce better ecological landscapes and social benefits.

[0003] In order to improve the purification effect of water bodies, wetlands are usually designed to be long and shallow water bodies to extend the water flow path and increase the contact area between the water body and the substrate and plants. The plant root systems in the wetland are dense, especially some emergent plants and floating plants. Their stems, leaves and roots form physical resistance to water flow. The bottom of the wetland is usually paved with matrix materials such as gravel and sand, which provide a surface for microorganisms to attach to, and also form resistance to water flow. In addition, many wetlands rely on gravity flow rather than pumping water. These factors have caused the wetland water body to have a low flow rate and insufficient hydrodynamic conditions, affecting the spawning environment of fish that need water flow stimulation to reproduce, resulting in the impact on biodiversity and ecological balance. Summary of the invention

[0004] The present invention can solve the problem that the slow water flow in the wetland affects the spawning of fish by providing a device and a method for promoting the spawning of fish in a lake wetland.

[0005] In order to solve the above technical problems, the present invention provides a device for promoting fish spawning in lake wetlands, comprising: a diversion and water retaining component, a wind flow enhancement component and a fish spawning reef;

[0006] The diversion and water retaining assembly comprises a first diversion and water retaining wall plate and a second diversion and water retaining wall plate; the first diversion and water retaining wall plate and the second diversion and water retaining wall plate are symmetrically arranged along the water flow direction in the wetland, and a diversion channel is formed between the first diversion and water retaining wall plate and the second diversion and water retaining wall plate;

[0007] The wind flow enhancement assembly is located in the flow guide channel between the first flow guide water retaining wall plate and the second flow guide water retaining wall plate;

[0008] Along the water flow direction, the fish spawning reef is located in front of the diversion and water retaining component.

[0009] In a preferred embodiment of the present invention, along the water flow direction, the distance between the front ends of the first guide water retaining wall plate and the second guide water retaining wall plate is 0.5 to 1 m, and the distance between the rear ends is 20 to 30 m; the length of the first guide water retaining wall plate and the second guide water retaining wall plate is 20 to 30 m.

[0010] In a preferred embodiment of the present invention, the wind flow enhancement component is a windmill or a turbine.

[0011] In a preferred embodiment of the present invention, the surface of the fish spawning reef is paved with gravel and fine sand, and emergent plants, floating leaf plants and / or submerged plants are planted around it.

[0012] In a preferred embodiment of the present invention, the distance between the wind flow enhancement component and the fish spawning reef is 5 to 8 meters.

[0013] In a preferred embodiment of the present invention, the device further comprises a water flow rate monitor and a program controller;

[0014] The water flow velocity monitor is located between the diversion and water retaining assembly and the fish spawning reef;

[0015] The water flow velocity monitor is connected to the program controller by signal, and is connected to the wind flow enhancement component through linkage control of the program controller.

[0016] In a preferred embodiment of the present invention, the wind flow enhancement component, the water flow velocity monitor and the center line of the fish spawning reef are in a straight line.

[0017] In a preferred embodiment of the present invention, the distance between the diversion and water retaining assembly and the water flow velocity monitor is 2 to 4 meters.

[0018] In order to solve the above technical problems, the present invention also provides a method for promoting spawning of fish in lake wetlands. In a still water lake wetland, the above-mentioned device for promoting spawning of fish in lake wetlands is arranged along the direction of water flow, and the wind flow enhancement component is adjusted to increase the flow velocity of the water flowing through the fish spawning reef, so that the fish can complete spawning in the fish spawning reef under a suitable water flow environment.

[0019] In a preferred embodiment of the present invention, the water flow velocity is 0.1-1 m / s.

[0020] The beneficial effects of the present invention are as follows: the present invention provides a device and method for promoting spawning of fish in lake wetlands. Through the design of the diversion and water retaining component, the wind flow-increasing component and the fish spawning reef, the water flow velocity in the lake wetland is increased by wind, a suitable spawning environment is provided for fish, and the smooth spawning of fish that need water flow stimulation for reproduction is successfully promoted. The device is highly practical and the method is simple and easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of a preferred embodiment 1 of a device for promoting spawning of fish in lake wetlands of the present invention;

[0022] The markings of the components in the accompanying drawings are as follows:

[0023] 10. diversion and water retaining assembly, 11. first diversion and water retaining wall plate, 12. second diversion and water retaining wall plate;

[0024] 20. Wind-driven current enhancement components; 30. Fish spawning reefs; 40. Water flow velocity monitors. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0026] See also Figure 1 The present invention discloses a device for promoting fish spawning in lake wetlands, comprising: a diversion and water retaining component 10, a wind flow enhancement component 20 and a fish spawning reef 30.

[0027] The diversion and water retaining assembly 10 includes a first diversion and water retaining wall plate 11 and a second diversion and water retaining wall plate 12 having the same structure.

[0028] The first diversion water retaining wall plate 11 and the second diversion water retaining wall plate 12 are symmetrically arranged along the water flow direction in the lake wetland, and the distance between the front ends of the first diversion water retaining wall plate 11 and the second diversion water retaining wall plate 12 along the water flow direction is 0.5-1m, and the distance between the rear ends is 20-30m, thereby forming a diversion channel with a large water inlet end (rear end) and a small water outlet end (front end), thereby increasing the speed of water flowing out of the diversion water retaining assembly 10, playing the role of increasing the speed of water flow. The structure of the first diversion water retaining wall plate 11 and the second diversion water retaining wall plate 12 can be a straight wall plate or an eight-shaped wall plate.

[0029] The wind flow enhancement component 20 is located in the diversion channel between the first diversion water retaining wall plate 11 and the second diversion water retaining wall plate 12, specifically located at the central axis of the diversion channel and close to the water outlet end, so as to further increase the speed of water flowing out of the diversion water retaining component 10, and increase the water flow speed to a water flow speed range suitable for fish spawning.

[0030] Specifically, the wind flow enhancement component 20 is a windmill or a turbine.

[0031] The fish spawning reef 30 is a polygonal structure, with gravel and sand with a particle size of 1-2 cm laid on its surface, and emergent plants, floating leaf plants or submerged plants planted around it, forming an ecological environment that provides suitable egg-laying and habitat places for different fish, thereby improving biodiversity.

[0032] Along the water flow direction, the fish spawning reef 30 is located 5 to 8 meters in front of the diversion and water retaining assembly 10.

[0033] Furthermore, the device also includes a water flow velocity monitor 40 and a program controller. The water flow velocity monitor 40 is located between the diversion and water retaining assembly 10 and the fish spawning reef 30, and the distance between the water flow velocity monitor 40 and the diversion and water retaining assembly 10 is 2 to 4 meters. The water flow velocity monitor 40 is connected to the program controller signal, and is connected to the switch valve of the windmill or turbine through the program controller, and is used to monitor the water flow velocity during the operation of the device in real time, and regulate the switch or power of the windmill or turbine according to the measured value, so as to ensure that the water flow velocity before entering the fish spawning reef 30 under the action of the device is between 0.1 and 1 m / s, providing an ideal flow-increasing spawning environment for fish.

[0034] Specifically, the center lines of the wind flow enhancement component 10, the water flow velocity monitor 40 and the fish spawning reef 30 are in a straight line, ensuring that the water flow acceleration effect and the water flow velocity monitoring result are optimal.

[0035] The method of using the above device to promote fish spawning in lake wetlands, the specific operation method is: in a still water lake wetland, the diversion and water retaining assembly 10, the wind flow enhancement assembly 20, the fish spawning reef 30 and the water flow velocity monitor 40 are arranged in sequence along the water flow direction, the wind flow enhancement assembly 20 is turned on, and the water flow velocity monitor 40 and the program controller are used to monitor and adjust the water flow velocity flowing through the fish spawning reef in real time to ensure that the water flow velocity is maintained between 0.1 and 1 m / s until the fish complete spawning in the fish spawning reef in a suitable water flow environment.

[0036] Example 1

[0037] In Changshu South Lake, an open area in the southwest corner of the lake was selected, where the water flow velocity is relatively low. The first diversion water retaining wall plate 11 and the second diversion water retaining wall plate 12 (both are figure eight-shaped wall plates) of the device are arranged in the direction of the water outlet facing south, and the width of the water outlet is set to 1m, the width of the water inlet is 25m, and the overall length is 25m. A wind turbine is arranged in the middle position of the first diversion water retaining wall plate 11 and the second diversion water retaining wall plate 12 near the water outlet, and the water flow velocity in the diversion channel is further increased in conjunction with the dominant wind direction. A polygonal fish spawning reef is set 5 meters in front of the water outlet, and the reef body is covered with fine gravel and sand, and floating leaf plants and submerged plants are planted around it. A water flow velocity monitor is arranged between the front end of the first diversion water retaining wall panel 11 and the second diversion water retaining wall panel 12 and the position between the fish spawning reef to monitor the water flow velocity in real time within the range of 0.5 to 1 m / s, thereby attracting fish adapted to spawning in flowing water, such as bream, to reproduce and successfully complete spawning in this water flow environment.

[0038] Example 2

[0039] The southeast corner of Kuncheng Lake in Changshu has good wind direction conditions in summer. The first diversion retaining wall plate 11 and the second diversion retaining wall plate 12 (both are eight-shaped wall plates) of the device are arranged according to the direction of water flow, so that the width of the water inlet end is 22 meters, the width of the water outlet end is 0.8 meters, and the length is 20 meters, forming a diversion channel. A turbine windmill is set in the middle of the diversion channel near the water outlet to further increase the flow in southerly weather. A polygonal fish spawning reef is arranged 5 meters in front of the water outlet, and sand and gravel with a particle size of 1-2 cm are laid on the surface of the reef. At the same time, emergent plants and submerged plants are added around the reef. A water flow velocity monitor is set at the front end of the first diversion retaining wall plate 11 and the second diversion retaining wall plate 12 and the middle of the fish spawning reef to monitor the water flow velocity in real time within the range of 0.5-0.8m / s. In the spawning area, the flow velocity is about 2 times higher than that of the surrounding lake area under southerly conditions. The device in Kuncheng Lake targets fish species such as black carp, yellow catfish, and crucian carp, which have successfully completed spawning in this water flow environment.

[0040] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A device for promoting spawning of fish in lake wetlands, characterized in that: include: diversion and water retaining components, wind-driven flow enhancement components and fish spawning reefs; The diversion and water retaining assembly comprises a first diversion and water retaining wall plate and a second diversion and water retaining wall plate; The first diversion water retaining wall plate and the second diversion water retaining wall plate are symmetrically arranged along the water flow direction in the wetland, and a diversion channel is formed between the first diversion water retaining wall plate and the second diversion water retaining wall plate; The wind flow enhancement assembly is located in the flow guide channel between the first flow guide water retaining wall plate and the second flow guide water retaining wall plate; Along the water flow direction, the fish spawning reef is located in front of the diversion and water retaining component.

2. The device for promoting spawning of fish in lake wetlands according to claim 1, characterized in that: Along the water flow direction, the distance between the front ends of the first guide water retaining wall plate and the second guide water retaining wall plate is 0.5-1m, the distance between the rear ends is 20-30m, and the length of the first guide water retaining wall plate and the second guide water retaining wall plate is 20-30m.

3. The device for promoting spawning of fish in lake wetlands according to claim 2, characterized in that: The wind flow enhancement component is a windmill or a turbine.

4. The device for promoting spawning of fish in lake wetlands according to claim 3, characterized in that: The surface of the fish spawning reef is paved with gravel and fine sand, and emergent plants, floating-leaf plants and / or submerged plants are planted around it.

5. The device for promoting spawning of fish in lake wetlands according to claim 4, characterized in that: The distance between the wind flow enhancement component and the fish spawning reef is 5 to 8 meters.

6. The device for promoting spawning of fish in lake wetlands according to claim 5, characterized in that: The device also includes a water flow rate monitor and a program controller; The water flow velocity monitor is located between the diversion and water retaining assembly and the fish spawning reef; The water flow velocity monitor is connected to the program controller by signal, and is connected to the wind flow enhancement component through linkage control of the program controller.

7. The device for promoting spawning of fish in lake wetlands according to claim 6, characterized in that: The wind flow enhancement component, the water flow velocity monitor and the center line of the fish spawning reef are in a straight line.

8. The device for promoting spawning of fish in lake wetlands according to claim 7, characterized in that: The distance between the diversion and water retaining assembly and the water flow velocity monitor is 2 to 4 meters.

9. A method for promoting spawning of fish in lake wetlands, characterized in that: In a still lake wetland, the device described in any one of claims 1 to 8 is arranged along the direction of water flow, and the wind flow enhancement component is adjusted to increase the flow velocity of water flowing through the fish spawning reef, so that fish can complete spawning in the fish spawning reef under a suitable water flow environment.

10. A method for promoting spawning of fish in lake wetlands according to claim 9, characterized in that: The water flow velocity is 0.1-1 m / s.

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