A Highly Efficient Method for Increasing Mussel Production Based on an Artificial Upwelling System

Abstract

This invention discloses a highly efficient method for increasing mussel production based on an artificial upwelling system. The method includes: adjusting the implementation parameters of the artificial upwelling system (including air injection volume, air injection depth, diameter of the air injection nozzle, injected gas density, and bubble sliding velocity) based on the mussel seedling suspension height, seawater density profile, seawater chlorophyll concentration profile, average depth of the aquaculture area, and the direction and velocity of the tidal current in the aquaculture area. The transport trajectory of the artificial upwelling plume (including plume height, transport half-width at the maximum height, and horizontal displacement at the maximum height) is calculated. This optimizes the placement and engineering parameters of the artificial upwelling in the mussel aquaculture area, forming an aquaculture model that efficiently supplements mussel feed using artificial upwelling driven by tidal currents, thereby achieving highly efficient mussel production and added value.

Description

Technical Field

[0001] This application relates to the fields of marine engineering and marine ecological technology, and in particular to an efficient method for increasing mussel production based on an artificial upwelling system. Background Technology

[0002] Mussels are mainly cultured on floating rafts, relying on seaweed and organic debris in the seawater as their food source. They do not depend on additional feeding and have a high degree of self-sufficiency.

[0003] With increasing farming density, insufficient water exchange has gradually become a key factor restricting mussel growth. Especially during spring and summer, food shortages have occurred in some farming areas, directly impacting farming efficiency and yield. Studies have shown that intensive mussel farming significantly hinders surface water flow, limiting natural nutrient replenishment and resulting in poor mussel growth within the farming areas.

[0004] Currently, there are no relevant technical means to solve the problem of food shortage for mussels in mussel farming areas caused by high surface flow resistance. Existing theories of artificial upwelling based on air curtains mainly target nutrient upwelling, but lack research on the flow resistance problem in mussel farming areas. As a result, deploying artificial upwelling systems based on experience or nutrient upwelling theories has not been very effective in increasing mussel production. Summary of the Invention

[0005] The purpose of this application is to provide a highly efficient method for increasing mussel production based on an artificial upwelling system, in order to solve the problem of insufficient mussel feed in the mussel farming area due to the large surface flow resistance in the mussel farming area, and the technical problem that the current artificial upwelling theory only focuses on nutrient enhancement, and there is no relevant research to provide guidance on the deployment of artificial upwelling in the mussel farming area.

[0006] To achieve the above objectives, the technical solution provided by the present invention is as follows:

[0007] In a first aspect, embodiments of this application provide a highly efficient method for increasing mussel production based on an artificial upwelling system, comprising:

[0008] The following data were collected: mussel seedling suspension height, seawater density profile, seawater chlorophyll concentration profile, average depth of the aquaculture area, direction and velocity of the tidal current in the aquaculture area, aeration volume of the artificial upwelling system at the average depth, nozzle diameter, gas density, and bubble slip velocity. The maximum transport height of the artificial upwelling plume, the transport half-width of the plume at the maximum height, and the horizontal displacement when the plume reaches its maximum upwelling height were calculated.

[0009] The horizontal placement position of the artificial upflow injection device is determined based on the horizontal displacement when the plume reaches its maximum rising height.

[0010] The placement depth of the artificial upflow aeration device is determined based on the maximum transport height of the artificial upflow plume, the transport half-width of the plume at the maximum height, and the suspension height of the mussel seedlings in the aquaculture area.

[0011] The artificial upflow gas injection device is deployed according to its horizontal placement position and placement depth, and the artificial upflow system is then operated.

[0012] According to a preferred embodiment of the present invention, the calculation of the maximum transport height of the artificial updraft plume, the transport half-width of the plume at the maximum height, and the horizontal displacement when the plume reaches its maximum updraft height includes:

[0013] Based on the seawater density profile of the aquaculture area, the air injection volume of the artificial upwelling system at the average depth, and the injected gas density, the initial buoyancy flux and buoyancy frequency are determined.

[0014] Based on the initial buoyancy flux, the tidal velocity of the aquaculture area, the average depth of the aquaculture area, and the air injection volume of the artificial upflow system at the average depth, the artificial upflow plume separation height and the plume half-width at the separation position are calculated.

[0015] Based on the artificial upflow plume separation height, plume half-width at the separation location, aeration nozzle diameter, average depth of the aquaculture area, aeration volume of the artificial upflow system at the average depth, and tidal flow velocity of the aquaculture area, the injected gas density, the average vertical velocity and density of the plume at the separation point are calculated.

[0016] Based on the plume half-width at the separation location, the average vertical velocity and density of the plume at the separation point, and the seawater density profile, calculate the jet momentum and jet buoyancy flux at the separation point.

[0017] Based on the jet flux and jet buoyancy flux at the separation point, the transport height and transport half-width of the artificial upwell plume are calculated using the Runge-Kutta numerical method.

[0018] Based on the transport height and transport half-width of the artificial upflow plume, calculate the maximum upflow height, transport half-width of the plume at the maximum height, and horizontal displacement when the plume reaches its maximum upflow height.

[0019] Optionally, based on the horizontal placement and depth of the artificial upflow aeration device, the artificial upflow system is deployed in the mussel farming area, and the artificial upflow aeration nozzles are fixed using farming floats. The nozzles are connected to an air compressor located outside the farming area via aeration pipes. The start and stop of the air compressor are controlled to operate the artificial upflow system.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] This invention applies artificial upwelling technology to mussel farming, combining it with tidal effects to optimize the entrainment and lifting of feed in the middle and lower water layers. This effectively solves the problem of insufficient feed within the farming area and promotes increased mussel production. The placement method proposed in this invention improves upon existing artificial upwelling plume calculation methods, extending the theory of artificial upwelling plumes, which only addresses nutrient transport, to the field of mussel farming for increased production. It sets horizontal placement positions and depths, comprehensively considering the maximum height of the artificial upwelling plume transport, the half-width of the artificial upwelling plume transport, the horizontal displacement at the maximum upwelling height, and the chlorophyll concentration distribution. This artificial upwelling placement method ensures high efficiency in artificial upwelling plume transport while avoiding the entrainment of lower water layers with low feed concentrations, thus promoting mussel production more efficiently.

[0022] The deployment method proposed in this invention is applicable to the most common raft-type mussel farming method, and the deployment device has a simple and stable structure, making it highly applicable and practical.

[0023] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0025] Figure 1 This is a flowchart illustrating a mussel production enhancement method based on an artificial upwelling system, according to an exemplary embodiment.

[0026] Figure 2 This is a schematic diagram illustrating the determination of the horizontal placement position of an artificial upflow gas injection device according to an exemplary embodiment.

[0027] Figure 3 This is a schematic diagram illustrating the determination of the deployment depth of an artificial upflow gas injection device according to an exemplary embodiment.

[0028] Figure 4 This is a schematic diagram illustrating the deployment of an artificial upwelling system for increasing mussel production, according to an exemplary embodiment.

[0029] Figure 5 This is a schematic diagram illustrating the mechanism of a mussel production enhancement method based on an artificial upwelling system according to an exemplary embodiment.

[0030] In the diagram, 1-air compressor, 2-floating platform, 3-aquaculture area, 4-aquaculture buoy, 5-mussel seedling rope and mussel string, 6-air injection nozzle, 7-nozzle load, 8-pipeline load, 9-air injection pipeline, 10-flow meter, 11-power supply system, 12-controller. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings.

[0032] To promote increased mussel production, this invention proposes a highly efficient mussel production method based on an artificial upwelling system. This technology is simple, reliable, and easy to operate, and can be applied in any marine environment.

[0033] Figure 1 This is a flowchart illustrating an efficient method for increasing mussel production based on an artificial upwelling system, according to an exemplary embodiment. Figure 1 As shown, the method may include the following steps:

[0034] S1: Obtain the mussel seedling suspension height, seawater density profile, seawater chlorophyll concentration profile, average depth of the aquaculture area, tidal current direction and velocity of the aquaculture area, aeration volume of the artificial upwelling system at the average depth, diameter of the aeration nozzle, density of the injected gas, and bubble slip velocity.

[0035] Specifically, CTD sensors were used to measure the seawater density profile ρ(z), seawater chlorophyll concentration profile c(z), and the average depth h0 of the aquaculture area; APDL sensors were used to measure the tidal current direction and average current velocity u of the aquaculture area. ∞ The diameter d0 of the air injection nozzle in the aquaculture area is determined according to the design parameters, and the bubble slip velocity u s The aeration volume Q0 of the artificial upflow system at the average depth is determined based on the orifice diameter of the nozzle; the aeration volume h of the mussels in the aquaculture area is determined based on the rated aeration volume of the aeration system; m The length of the seedling rope in the breeding area is determined.

[0036] The above steps collect the minimum parameters needed to determine the placement location of the artificial upflow gas injection device, reducing the complexity of data acquisition for the artificial upflow system, increasing the parameter upload speed, and thus improving the program running speed.

[0037] S2: Based on the mussel hanging height in the aquaculture area, the seawater chlorophyll concentration profile, the average depth of the aquaculture area, the tidal current direction and velocity in the aquaculture area, the aeration volume of the artificial upwelling system at the average depth, the seawater density profile, the diameter of the aeration nozzle, the injected gas density, and the bubble slip velocity, calculate the maximum transport height of the artificial upwelling plume, the transport half-width of the artificial upwelling plume at the maximum height, and the horizontal displacement when the maximum upwelling height is reached; in this embodiment, S2 may include the following sub-steps:

[0038] S21: Based on the seawater density profile ρ(z) of the aquaculture area, determine the initial momentum flux B0 and buoyancy frequency N(z):

[0039]

[0040] Among them, the buoyancy frequency N(z) changes with the height z, ρ a ρ is the density of the ambient water at the injection nozzle. air Let ρ be the density of the injected gas, Q0 be the gas injection volume of the artificial upflow system at the average depth, and g be the acceleration due to gravity.

[0041] The above steps calculate the momentum flux and buoyancy frequency required to describe the bubble plume, enabling the behavior of the bubble plume to be described mathematically, which facilitates the calculation of the placement location of the artificial upflow injection device.

[0042] S22: Based on the initial buoyancy flux B0 and the bubble slip velocity u s Calculate the artificial updraft plume separation height z based on the horizontal tidal velocity, injection depth h0, and injection volume Q0 corresponding to the injection depth. d and the half-width r of the feather at the separation position d :

[0043] , d0 is the diameter of the air injection nozzle, and α is the entrainment coefficient, calculated by the following formula:

[0044]

[0045] Where h0 is the gas injection depth and Q0 is the gas injection volume corresponding to the gas injection depth;

[0046] The above steps determine the separation height and separation location of the artificial upflow plume at half-width, providing initial conditions for calculating the behavior of the bubble plume after separation using a jet model.

[0047] S23: According to the artificial updraft plume separation height z d , separation position plume half-width r dThe diameter d0 of the injection nozzle, the seawater density profile ρ(z), the injection volume corresponding to the injection depth, and the horizontal tidal current velocity u. ∞ Calculate the average vertical velocity u of the plume at the separation point. md Density ρ d :

[0048]

[0049] Where, ρ a ρ is the density of the ambient water at the location of the air injection nozzle. air The density of the injected gas and u0, the initial velocity of the plume, are calculated as follows:

[0050]

[0051] The above steps calculated the average vertical velocity and density of the plume at the separation point, and further determined the initial conditions of the jet after the bubble plume separation.

[0052] S24: Based on the described separation position, the plume half-width r d The average vertical velocity u of the plume at the separation point md Density ρ d Calculate the jet momentum M at the separation point using the seawater density profile ρ(z). d and jet buoyancy flux F d :

[0053] M d =πu md 2 r d 2 (9)

[0054]

[0055] The above steps calculate the initial conditions, jet flux, and buoyancy flux used to describe the jet behavior, enabling the behavior of the artificial updraft bubble plume after separation to be determined.

[0056] S25: Based on the jet flow rate M at the separation point d The jet buoyancy flux F at the separation point d The Runge-Kutta numerical method was used to calculate the transport height z(t) and transport half-width r(t) of the artificial upwelling plume:

[0057]

[0058] Where M(t) is the flux of the artificial updraft plume jet, M(0) = M d r(t) is the transport half-width of the artificial upwelling plume, r(0) = rd ;

[0059] The above steps used the Runge-Kutta numerical calculation method to calculate the transport height and transport half-width of the artificial updraft plume, determine the trajectory of the artificial updraft bubble plume, and achieve high accuracy.

[0060] S26: Calculate the maximum rise height z of the artificial updraft plume based on the transport height z(t) and the transport half-width r(t) of the artificial updraft plume. m The transport half-width r of the artificial upwelling plume at its maximum height m Horizontal displacement x when the artificial upwell reaches its maximum height m :

[0061]

[0062] r m =r(t) m (15)

[0063] z m =z(t) m (16)

[0064] x m =t m u ∞ (17) Where, t m The time required for an artificial upwelling plume to reach its maximum height.

[0065] The above steps determine the maximum rise height of the artificial upflow plume, the plume transport half-width at the maximum height, and the horizontal displacement at the maximum rise height of the artificial upflow, providing accurate theoretical guidance for determining the placement of the artificial upflow injection device.

[0066] S3: The method for determining the horizontal placement of the artificial upflow aeration device is as follows: Using the center of the aquaculture area as the center point, shift the horizontal displacement length x required to achieve the maximum artificial upflow height in the direction of the tidal flow. m This location is the horizontal placement position of the artificial upflow gas injection device.

[0067] The above steps correct the horizontal placement of the artificial updraft aeration device by adjusting the direction and velocity of the tidal flow, thereby reducing the phenomenon that the artificial updraft plume cannot efficiently act on the inner part of the mussel farming area due to horizontal displacement caused by the horizontal tidal flow.

[0068] S4: Based on the aforementioned seawater chlorophyll concentration profile, the maximum height z of the artificial upwelling plume transport... m The transport half-width r of the plume at its maximum height mand the mussel hanging height h in the aquaculture area m Determine the deployment depth h of the artificial upwelling plume. p Specifically:

[0069]

[0070] Among them, c s This indicates the chlorophyll concentration in surface water. This indicates that the chlorophyll concentration is equal to the depth of chlorophyll in the surface water.

[0071] The above steps, by combining the transport height of the artificial upwelling plume with the chlorophyll concentration profile of the seawater, ensure that the artificial upwelling plume can efficiently transport water to the mussel farming area, while under the action of the tide, the artificial upwelling plume can carry water with a high concentration of phytoplankton as nutrients for increased mussel production, and avoid diluting the mussel feed by entraining water with a low concentration of phytoplankton.

[0072] S5: Based on the horizontal placement position and placement depth h of the artificial upflow gas injection device p An artificial upflow system is deployed in the mussel farming area, and the artificial upflow injection nozzles are fixed in place by farming buoys. The nozzles are connected to an air compressor located outside the farming area via injection pipes. The start and stop of the air compressor are controlled to operate the artificial upflow system.

[0073] Specifically, the artificial upflow system here can be existing or designed in this application, for reference. Figure 4The artificial upwelling system of this application includes an air compressor 1, an injection nozzle 6, an injection pipeline 9, a flow meter 10, a controller 12, and a power supply system 11. The air compressor 1 compresses gas and injects it into one end of the injection pipeline 9. The other end of the injection pipeline 9 is connected to the injection nozzle 6, which is positioned below the aquaculture area 3. The flow meter 10 is fixed 3-4 meters below sea level to measure the horizontal tidal current velocity and direction at this location. The injection nozzle 6 is suspended 1-2 meters above the seabed. The controller 12 is connected to both the flow meter 10 and the air compressor 1. The air compressor 1, controller 12, and power supply system are all installed above the floating platform 2, and the flow meter 10 is installed below the floating platform 2 at a distance of... At a depth of 3-4 meters above sea level, the floating platform 2 is anchored to the seabed. One end of the air injection pipe 9 is connected to the air compressor 1, and the other end is connected to the air injection nozzle 6. The air injection pipe 9 is fixed to the seabed along its direction by a pipe load 8. The air injection pipe 9 is tied to a load-bearing rope slightly shorter than the air injection pipe to increase its wind and current resistance. The upper end of the air injection nozzle 6 is connected to the aquaculture buoy 4 by a connecting thick rope. Mussel seedling ropes and mussel strings 5 ​​are hung on the aquaculture buoy 4. The lower end of the air injection nozzle 6 is connected to the nozzle load 7 by a binding thick rope to stabilize the horizontal position of the air injection nozzle. The air injection nozzle 6 has evenly distributed circular holes along its circumference. The inner circle of circular holes has a diameter of 1.5 mm, and the middle and outer circles have a diameter of 2 mm to ensure uniform air output. The number of circular holes on the air injection nozzle is related to the air injection volume to ensure that the velocity at the outlet is 0.5-2 m / s.

[0074] The above steps complete the deployment of the artificial upwelling system. The construction process is simple, requires fewer engineering materials, and enables the artificial upwelling system to operate efficiently for a long time.

[0075] Figure 2 This is a schematic diagram illustrating the determination of the horizontal placement position of an artificial upflow gas injection device according to an exemplary embodiment. (Refer to...) Figure 2 The artificial upflow injection device is positioned at the location of the maximum horizontal displacement distance of the upward displacement in the opposite direction of the incoming flow, so that the artificial upflow plume can accurately act on the mussels in the inner circle, thereby improving the efficiency of mussel production.

[0076] Figure 3 This is a schematic diagram illustrating the determination of the deployment depth of an artificial upflow gas injection device according to an exemplary embodiment. (Refer to...) Figure 3 The artificial upflow bubble plume is eventually transported to the position of maximum upflow height. Therefore, the artificial upflow aeration device should be placed at the position of maximum upflow height below the hanging height of the mussel seedlings. However, considering the chlorophyll concentration profile, there may be cases of water with low concentration of chlorophyll being carried in. Therefore, the smaller of the two values ​​is taken as the final placement depth of the artificial upflow aeration device.

[0077] Figure 5 This is a schematic diagram illustrating the mussel production enhancement mechanism based on an artificial upwelling system according to an exemplary embodiment. The artificial upwelling system utilizes the air compressor to transport gas along the injection pipeline to the injection nozzle, forming an artificial upwelling plume. Under the influence of horizontal currents, the artificial upwelling plume continuously entrains surrounding water and rises to the height of the mussel seedlings, replenishing them with nutrients and achieving increased mussel production. Simultaneously, because the upwelling plume surges the intermediate water, surrounding algae-rich water forms a compensating flow in the absence of the intermediate water, increasing the algae content in the intermediate mussel farming area and further providing food for the mussels. Furthermore, because the lower water layer contains more nutrients, these nutrients are carried to the upper water layer by the bubble plume, promoting algae growth in the upper water layer and thus providing more food for the mussels.

[0078] For the device embodiments, since they basically correspond to the method embodiments, the relevant parts can be referred to in the description of the method embodiments. The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this application according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0079] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this application are indicated by the claims.

[0080] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A highly efficient method for increasing mussel production based on an artificial upwelling system, characterized in that, include: The following parameters are obtained for the mussel seedling suspension height, seawater density profile, seawater chlorophyll concentration profile, average depth of the aquaculture area, direction and velocity of the tidal current, aeration volume of the artificial upwelling system at the average depth, nozzle diameter, injected gas density, and bubble slip velocity. The maximum transport height of the artificial upwelling plume, the transport half-width of the plume at the maximum height, and the horizontal displacement when the plume reaches its maximum upwelling height are calculated. The calculation of the maximum transport height, the transport half-width of the plume at the maximum height, and the horizontal displacement when the plume reaches its maximum upwelling height includes: Based on the seawater density profile of the aquaculture area, the air injection volume of the artificial upwelling system at the average depth, and the injected gas density, the initial buoyancy flux and buoyancy frequency are determined. Based on the initial buoyancy flux, tidal flow velocity in the aquaculture area, average depth of the aquaculture area, and aeration volume of the artificial upflow system at the average depth, calculate the artificial upflow plume separation height and the plume half-width at the separation point; based on the artificial upflow plume separation height, plume half-width at the separation point, aeration nozzle diameter, average depth of the aquaculture area, injected gas density, aeration volume of the artificial upflow system at the average depth, and tidal flow velocity in the aquaculture area, calculate the average vertical velocity and density of the plume at the separation point. Based on the plume half-width at the separation location, the average vertical velocity and density of the plume at the separation point, and the seawater density profile, calculate the jet momentum and jet buoyancy flux at the separation point. Based on the jet flux and jet buoyancy flux at the separation point, the transport height and transport half-width of the artificial upwell plume are calculated using the Runge-Kutta numerical method. Based on the transport height and transport half-width of the artificial upflow plume, calculate the maximum upflow height, transport half-width of the plume at the maximum height, and horizontal displacement when the plume reaches the maximum upflow height. The horizontal placement position of the artificial upflow injection device is determined based on the horizontal displacement when the plume reaches its maximum rising height. The placement depth of the artificial upflow aeration device is determined based on the maximum transport height of the artificial upflow plume, the transport half-width of the plume at the maximum height, and the suspension height of the mussel seedlings in the aquaculture area. The artificial upflow gas injection device is deployed according to its horizontal placement position and placement depth, and the artificial upflow system is then operated.

2. The method according to claim 1, characterized in that, Based on the seawater density profile of the aquaculture area, the initial buoyancy flux and buoyancy frequency are determined as follows: Where B0 is the initial buoyancy flux, N(z) is the buoyancy frequency, and ρ a ρ is the density of the ambient water at the injection nozzle. air ρ(z) represents the density of the injected gas, Q0 represents the gas injection volume of the artificial upwelling system at the average depth of the aquaculture area, g represents the acceleration due to gravity, ρ(z) represents the seawater density profile, and z represents the water depth.

3. The method according to claim 1, characterized in that, The calculation of the artificial updraft plume separation height and the plume half-width at the separation location is specifically as follows: Among them, z d r is the height at which the artificial updraft plume separates from the stream. d The plume half-width at the point where the artificial upflow plume separates, u s Let B0 be the bubble slip velocity, B0 be the initial buoyancy flux, d0 be the diameter of the injection nozzle, and u be the value of the bubble slip velocity. ∞ Let α be the horizontal tidal current velocity, and α be the entrainment coefficient, calculated by the following formula: Where h0 is the gas injection depth and Q0 is the gas injection volume of the artificial upflow system at the average depth of the aquaculture area.

4. The method according to claim 1, characterized in that, The calculation of the average vertical velocity and density of the plume at the separation point is specifically as follows: Among them, u md Let ρ be the average vertical velocity of the plume at the separation point. d Let ρ be the density of the plume at the separation point. a ρ is the density of the ambient water at the injection nozzle. air For the density of the injected gas, u ∞ Let u0 be the horizontal tidal current velocity and u0 be the initial velocity of the plume. The calculation method is as follows:

5. The method according to claim 1, characterized in that, Based on the plume half-width at the separation location, the average vertical velocity and density of the plume at the separation point, and the seawater density profile, calculate the jet momentum and jet buoyancy flux at the separation point, including: M d =πu md 2 r d 2 (9) Among them, M d F is the jet momentum at the separation point. d This represents the jet buoyancy flux at the separation point.

6. The method according to claim 5, characterized in that, The calculation of the transport height and transport half-width of the artificial upwell plume includes: Where M(t) is the flux of the artificial updraft plume jet, M(0) = M d r(t) is the transport half-width of the artificial upwelling plume, r(0) = r d z(t) is the transport height of the artificial upwelling plume.

7. The method according to claim 6, characterized in that, Based on the transport height and half-width of the artificial updraft plume, calculate the maximum updraft height, the transport half-width at the maximum height, and the horizontal displacement when the plume reaches its maximum updraft height, including: r m ＝r(t m ) (15) z m =z(t m ) (16) x m =t m u ∞ (17) Among them, t m r is the time required for an artificial upwelling plume to reach its maximum height. m z is the transport half-width of the plume at its maximum height. m x represents the maximum rise height of the artificial upwelling plume. m The horizontal displacement required to reach the maximum rising height of the plume.

8. The method according to claim 1, characterized in that, The method for determining the horizontal placement position of the artificial upflow aeration device is as follows: taking the center of the aquaculture area as the center, shift the horizontal displacement length in the direction of the tidal flow to reach the maximum upflow height of the plume. This position is the horizontal placement position of the artificial upflow aeration device.

9. The method according to claim 1, characterized in that, Based on the seawater chlorophyll concentration profile, the maximum height of the artificial updraft transport, the transport half-width at the maximum height, and the mussel suspension height in the aquaculture area, the deployment depth of the artificial updraft aeration device is determined, including: Among them, h p h is the deployment depth of the artificial upflow plume injection device. m The hanging height of mussels in the aquaculture area, z m c is the maximum rise height of the artificial upwelling plume. s This indicates the chlorophyll concentration in the surface water. This indicates that the chlorophyll concentration is equal to the depth of chlorophyll in the surface water.

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