Method, apparatus, electronic device and storage medium for determining plume emission height

Abstract

This application relates to the field of ocean engineering and provides a method, device, electronic device, and storage medium for determining the discharge height of a plume. The method is applied to a target area, and the target area includes a plume to be discharged. The method includes: obtaining the attribute parameters of the target area and the discharge parameters of the plume to be discharged; determining that the plume type of the plume to be discharged is a first plume type or a second plume type based on the attribute parameters of the target area and the discharge parameters of the plume to be discharged; obtaining a first discharge height for the plume to be discharged based on the determination result that the plume type of the plume to be discharged is a first plume type or a second plume type; and obtaining the target discharge height of the plume to be discharged based on the first discharge height, the attribute parameters of the target area, and the discharge parameters of the plume to be discharged. It is possible to accurately determine the discharge height of the plume to be discharged, so as to ensure that the plume can be captured by the hypoxic layer of seawater, thereby alleviating the problem of ocean hypoxia.

Description

Technical Field

[0001] The present application relates to the field of ocean engineering, and particularly to a method, device, electronic device and storage medium for determining the discharge height of a plume. Background Art

[0002] Low oxygen in the ocean can damage biological habitats, resulting in a large number of deaths of organisms, changing the structure of the marine food chain, disrupting the global carbon cycle balance, accelerating the release of greenhouse gases from seawater, and then changing the global climate and deteriorating the earth's ecological environment.

[0003] Artificial downwelling technology is a new marine artificial system technology that mimics the downward movement of surface seawater in nature to supplement the dissolved oxygen concentration in the bottom layer, and can effectively alleviate ocean hypoxia. In related technologies, artificial downwelling technology is usually combined with a tidal energy oxygenation device to discharge a plume into the hypoxic layer of the ocean to alleviate hypoxia. However, affected by the horizontally flowing tide that changes constantly, it is impossible to ensure that the upper plume is captured by the hypoxic layer under the combined action of the low-density plume and the horizontal cross-flow. Therefore, how to ensure that the downwardly discharged plume can be effectively captured by the hypoxic layer has become a technical problem to be solved urgently. Summary of the Invention

[0004] The present application provides a method, device, electronic device and storage medium for determining the discharge height of a plume, so as to solve at least the above technical problems existing in the prior art.

[0005] According to a first aspect of the present application, there is provided a method for determining the discharge height of a plume, which is applied to a target area, and the target area includes a plume to be discharged; the method includes:

[0006] Obtain the attribute parameters of the target area and the discharge parameters of the plume to be discharged;

[0007] Based on the attribute parameters of the target area and the discharge parameters of the plume to be discharged, determine that the plume type of the plume to be discharged is a first plume type or a second plume type;

[0008] Based on the determination result that the plume type of the plume to be discharged is a first plume type or a second plume type, obtain a first discharge height for the plume to be discharged;

[0009] Based on the first discharge height, the attribute parameters of the target area and the discharge parameters of the plume to be discharged, obtain the target discharge height of the plume to be discharged.

[0010] In an implementable manner, the determining that the plume type of the plume to be discharged is a first plume type or a second plume type based on the attribute parameters of the target area and the discharge parameters of the plume to be discharged includes:

[0011] Based on the attribute parameters of the target area and the emission parameters of the plume to be emitted, obtain the target emission velocity of the plume to be emitted;

[0012] Based on the target emission velocity of the plume to be emitted and the emission parameters, obtain the first initial flux and the second initial flux of the plume to be emitted;

[0013] Based on the first initial flux of the plume to be emitted, the attribute parameters of the target area and the emission parameters of the plume to be emitted, obtain the third initial flux of the plume to be emitted;

[0014] Based on the second initial flux and the third initial flux, determine that the plume type of the plume to be emitted is the first plume type or the second plume type.

[0015] In an implementable manner, the target area further includes a horizontal cross-flow, and the attribute parameters of the target area include the flow velocity for the horizontal cross-flow; the determining that the plume type of the plume to be emitted is the first plume type or the second plume type based on the second initial flux and the third initial flux includes:

[0016] Based on the second initial flux of the plume to be emitted and the flow velocity for the horizontal cross-flow, obtain the first characteristic length for the horizontal cross-flow;

[0017] Based on the third initial flux of the plume to be emitted and the flow velocity for the horizontal cross-flow, obtain the second characteristic length for the horizontal cross-flow;

[0018] Based on the attribute parameters of the target area, obtain the target frequency for the plume to be emitted;

[0019] Based on the target frequency for the plume to be emitted and the flow velocity for the horizontal cross-flow, obtain the third characteristic length for the horizontal cross-flow;

[0020] Based on the first characteristic length, the second characteristic length and the third characteristic length for the horizontal cross-flow, determine that the plume type of the plume to be emitted is the first plume type or the second plume type.

[0021] In an implementable manner, the determining that the plume type of the plume to be emitted is the first plume type or the second plume type based on the first characteristic length, the second characteristic length and the third characteristic length for the horizontal cross-flow includes:

[0022] Based on the product of the second characteristic length and the third characteristic length for the horizontal cross-flow and the first preset value, obtain the first reference value for the plume type of the plume to be emitted;

[0023] Based on the first characteristic length for the horizontal cross-flow and the second preset value, obtain the second reference value for the plume type of the plume to be emitted;

[0024] When the first reference value is less than the second reference value, the plume type of the plume to be discharged is the first plume type;

[0025] When the first reference value is greater than or equal to the second reference value, the plume type of the plume to be discharged is the second plume type.

[0026] In an implementable manner, obtaining a first discharge height for the plume to be discharged based on a determination result that the plume type of the plume to be discharged is the first plume type or the second plume type includes:

[0027] When the plume type of the plume to be discharged is the first plume type, obtaining a first discharge height for the plume to be discharged based on the attribute parameters of the target area, the discharge parameters of the plume to be discharged, and a first determination relation;

[0028] When the plume type of the plume to be discharged is the second plume type, obtaining a first discharge height for the plume to be discharged based on the attribute parameters of the target area, the discharge parameters of the plume to be discharged, and a second determination relation.

[0029] In an implementable manner, the target area includes a discharge layer for the plume to be discharged; the attribute parameters of the target area include the thickness of the discharge layer and the initial discharge height for the plume to be discharged; obtaining the target discharge height of the plume to be discharged based on the first discharge height, the attribute parameters of the target area, and the discharge parameters of the plume to be discharged includes:

[0030] When the first discharge height is less than the difference between the initial discharge height and the thickness of the discharge layer, obtaining the target discharge height of the plume to be discharged based on a first preset target step; the target discharge height of the plume to be discharged is less than the initial discharge height;

[0031] When the first discharge height is greater than the initial discharge height, obtaining the target discharge height of the plume to be discharged based on a second preset target step; the target discharge height of the plume to be discharged is greater than the initial discharge height.

[0032] In an implementable manner, it further includes:

[0033] When the first discharge height is greater than the difference between the initial discharge height and the thickness of the discharge layer, and the first discharge height is less than the initial discharge height, the target discharge height of the plume to be discharged is equal to the initial discharge height.

[0034] According to the second aspect of the present application, there is provided a device for determining the discharge height of a plume. The device is applied to a target area, and the target area includes a plume to be discharged; the device includes:

[0035] A first acquisition unit, configured to acquire the attribute parameters of the target area and the discharge parameters of the plume to be discharged;

[0036] A first determination unit, configured to determine that the plume type of the plume to be discharged is a first plume type or a second plume type based on the attribute parameters of the target area and the discharge parameters of the plume to be discharged;

[0037] A second acquisition unit, configured to obtain a first discharge height for the plume to be discharged based on the determination result that the plume type of the plume to be discharged is a first plume type or a second plume type;

[0038] A third acquisition unit, configured to obtain a target discharge height of the plume to be discharged based on the first discharge height, the attribute parameters of the target area, and the discharge parameters of the plume to be discharged.

[0039] According to a third aspect of the present application, there is provided an electronic device, including:

[0040] At least one processor; and

[0041] A memory communicatively connected to the at least one processor; wherein,

[0042] The memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the method described in the present application.

[0043] According to a fourth aspect of the present application, there is provided a non-transitory computer-readable storage medium storing computer instructions, and the computer instructions are used to cause a computer to execute the method described in the present application.

[0044] In the present application, the attribute parameters of the target area and the discharge parameters of the plume to be discharged are obtained; based on the attribute parameters of the target area and the discharge parameters of the plume to be discharged, it is determined that the plume type of the plume to be discharged is a first plume type or a second plume type; based on the determination result that the plume type of the plume to be discharged is a first plume type or a second plume type, a first discharge height for the plume to be discharged is obtained; based on the first discharge height, the attribute parameters of the target area, and the discharge parameters of the plume to be discharged, the target discharge height of the plume to be discharged is obtained. It is possible to accurately determine the discharge height of the plume to be discharged, so as to ensure that the plume can be captured by the hypoxic layer of seawater, thereby alleviating the problem of ocean hypoxia.

[0045] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become easily understood through the following description. Description of the Drawings

[0046] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features, and advantages of the exemplary embodiments of the present application will become readily understood. In the drawings, several embodiments of the present application are shown in an exemplary rather than restrictive manner, where:

[0047] In the drawings, the same or corresponding reference numerals denote the same or corresponding parts.

[0048] Figure 1 A schematic flowchart of the implementation of the method for determining the discharge height of the plume in the embodiment of the present application is shown;

[0049] Figure 2 A scene diagram of the plume discharge in the embodiment of the present application is shown;

[0050] Figure 3 A schematic diagram of the composition structure of the device for determining the discharge height of the plume in the embodiment of the present application is shown;

[0051] Figure 4 A schematic diagram of the composition structure of an electronic device in the embodiment of the present application is shown. Detailed implementation manners

[0052] To make the objectives, features, and advantages of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present application.

[0053] In the embodiments of the present application, the target area is a marine area, which is a linear stratified water body including multiple layers, and the bottom layer is an anoxic layer. The plume to be discharged is a plume to be discharged from the ocean surface to the bottom layer to alleviate the low oxygen condition of the anoxic layer. The plume to be discharged is discharged by means of a tidal current pump-type device, and the tidal current pump-type device mainly discharges the plume through a diversion pipe.

[0054] The embodiments of the present application provide a method for determining the discharge height of a plume. The method is applied to a target area, and the target area includes a plume to be discharged; as Figure 1 shown, the method includes:

[0055] S101: Obtain the attribute parameters of the target area and the discharge parameters of the plume to be discharged.

[0056] In this step, referring to Figure 2 shown, the target area is a marine area, including oxygen-rich surface seawater, horizontal cross-flow (flow velocity) , oxygen-deficient bottom seawater (hypoxic layer) and sediments existing at the ocean bottom. Generally, the dissolved oxygen concentration in oxygen-deficient bottom seawater < 2 mg / L. To alleviate the low oxygen situation in the ocean hypoxic layer, relevant current pump-type devices mainly discharge oxygen-rich surface seawater with a relatively high oxygen content into the oxygen-deficient bottom seawater through a diversion pipe (including an elbow and a downflow pipe). Specifically, the oxygen-rich plume in the oxygen-rich surface seawater enters the downflow pipe through the elbow and is discharged into the oxygen-deficient bottom seawater through the downflow pipe.

[0057] The attribute parameters of the target area are relevant parameters of the ocean area, including the density gradient of seawater in the ocean area, the density of hypoxic layer seawater, the thickness of the hypoxic layer, the current horizontal current velocity, etc. The discharge parameters of the plume to be discharged include the radius of the diversion pipe for plume discharge, the length of the diversion pipe, the inner wall roughness of the diversion pipe, the initial discharge height and discharge density of the plume to be discharged, etc. The attribute parameters of the target area and the discharge parameters of the plume to be discharged can both be obtained by measurement and reading.

[0058] S102: Based on the attribute parameters of the target area and the discharge parameters of the plume to be discharged, determine that the plume type of the plume to be discharged is the first plume type or the second plume type.

[0059] In this step, the plume to be discharged includes two types: the first plume type and the second plume type. Among them, the first plume type is a momentum-dominated near-field plume, and the second plume type is a momentum-dominated far-field plume. The plume type of the plume to be discharged is determined based on the attribute parameters of the target area and the discharge parameters of the plume to be discharged. For the specific process, please refer to the detailed description in the relevant parts below and will not be elaborated.

[0060] S103: Based on the determination result that the plume type of the plume to be discharged is the first plume type or the second plume type, obtain the first discharge height for the plume to be discharged.

[0061] In this step, the first discharge height is the maximum discharge height for the plume to be discharged, which can be used as an important reference for judging whether the artificial downflow plume can be captured by the hypoxic layer. The calculation methods of the first discharge height for different types of plumes to be discharged are different. For the specific process, please refer to the detailed description in the relevant parts below and will not be elaborated.

[0062] S104: Based on the first discharge height, the attribute parameters of the target area and the discharge parameters of the plume to be discharged, obtain the target discharge height of the plume to be discharged.

[0063] In this step, the target discharge height of the plume to be discharged is the final height of the plume discharge, which may be the same as or different from the initial discharge height of the plume to be discharged in the aforementioned discharge parameters of the plume to be discharged. Whether the target discharge height is the height adjusted based on the initial discharge height of the plume to be discharged needs to be calculated and determined based on the first discharge height of the plume to be discharged, the attribute parameters of the target area, and the discharge parameters of the plume to be discharged. For the specific process, please refer to the detailed description in the relevant parts below and will not be elaborated here.

[0064] In the solutions shown in steps S101 to S104, the attribute parameters of the target area and the discharge parameters of the plume to be discharged are obtained; based on the attribute parameters of the target area and the discharge parameters of the plume to be discharged, it is determined that the plume type of the plume to be discharged is the first plume type or the second plume type; based on the determination result that the plume type of the plume to be discharged is the first plume type or the second plume type, the first discharge height of the plume to be discharged is obtained; based on the first discharge height, the attribute parameters of the target area, and the discharge parameters of the plume to be discharged, the target discharge height of the plume to be discharged is obtained. It is possible to accurately determine the discharge height of the plume to be discharged, so as to ensure that the plume can be captured by the hypoxic layer of the seawater, thereby alleviating the problem of ocean hypoxia.

[0065] In an alternative solution, the determining that the plume type of the plume to be discharged is the first plume type or the second plume type based on the attribute parameters of the target area and the discharge parameters of the plume to be discharged includes:

[0066] Based on the attribute parameters of the target area and the discharge parameters of the plume to be discharged, the target discharge velocity of the plume to be discharged is obtained;

[0067] Based on the target discharge velocity of the plume to be discharged and the discharge parameters, the first initial flux and the second initial flux of the plume to be discharged are obtained;

[0068] Based on the first initial flux of the plume to be discharged, the attribute parameters of the target area, and the discharge parameters of the plume to be discharged, the third initial flux of the plume to be discharged is obtained;

[0069] Based on the second initial flux and the third initial flux, it is determined that the plume type of the plume to be discharged is the first plume type or the second plume type.

[0070] In this application, the attribute parameters of the target area further include the dynamic viscosity of water. The discharge parameters of the plume to be discharged further include the inlet height above the pipe for plume discharge, the outlet height below the pipe for plume discharge, the curvature radius of the elbow of the draft tube for plume discharge, and so on. Based on the attribute parameters of the target area and the discharge parameters of the plume to be discharged, the target discharge velocity of the plume to be discharged can be calculated through the following formula (1):

[0071] Formula (1)

[0072] wherein w 0 is the target discharge velocity of the plume to be discharged. including ρ i and ρ 0, wherein ρ 0 is the discharge density of the plume to be discharged, ρ i is the seawater density at the inlet above the (diversion) pipe. r 0 is the radius of the diversion pipe for plume discharge. is the horizontal tidal current velocity. z i is the inlet height above the pipe for plume discharge. z o is the outlet height below the pipe for plume discharge. R is the curvature radius of the elbow of the diversion pipe for plume discharge. L is the length of the (diversion) pipe for plume discharge. δ is the inner wall roughness of the (diversion) pipe for plume discharge. Re is the Reynolds number, Re = ρ i w 0 r 0 / μ . μ is the dynamic viscosity of water. ξ t ( R , L , r 0, δ , Re ) is the total resistance loss generated during the plume discharge process. is the acceleration due to gravity.

[0073] In this application, the first initial flux is the initial mass flux of the plume to be discharged, and the second initial flux is the initial momentum flux of the plume to be discharged. Based on the target discharge velocity and discharge parameters of the plume to be discharged obtained from Formula (1), the first initial flux and the second initial flux of the plume to be discharged can be calculated through Formulas (2) and (3):

[0074] Formula (2)

[0075] Formula (3)

[0076] wherein is the first initial flux of the plume to be discharged when it is about to be discharged (refer to Figure 2 shown), is the second initial flux of the plume to be discharged when it is about to be discharged. is the target discharge velocity of the plume to be discharged, r 0 is the radius of the draft tube for discharging the plume.

[0077] The third initial flux of the plume to be discharged is the initial buoyancy flux of the plume to be discharged. The third initial flux of the plume to be discharged is calculated by formula (4):

[0078] Formula (4)

[0079] where is the third initial flux of the plume to be discharged when it is about to be discharged (refer to Figure 2 shown). is the discharge density of the plume to be discharged among the discharge parameters of the plume to be discharged. is the seawater density of the anoxic layer among the attribute parameters of the target area. is the first initial flux of the plume to be discharged. is the acceleration due to gravity.

[0080] Through the aforementioned formulas (1) to (4), the second initial flux and the third initial flux of the plume to be discharged can be accurately obtained, thereby providing a data basis for accurately obtaining the discharge height of the plume to be discharged subsequently.

[0081] In an alternative embodiment, the target area further includes a horizontal cross-flow, and the attribute parameters of the target area include the flow velocity of the horizontal cross-flow; determining that the plume type of the plume to be discharged is the first plume type or the second plume type based on the second initial flux and the third initial flux includes:

[0082] Based on the second initial flux of the plume to be discharged and the flow velocity of the horizontal cross-flow, obtain the first characteristic length of the horizontal cross-flow;

[0083] Based on the third initial flux of the plume to be discharged and the flow velocity of the horizontal cross-flow, obtain the second characteristic length of the horizontal cross-flow;

[0084] Based on the attribute parameters of the target area, obtain the target frequency for the plume to be discharged;

[0085] Based on the target frequency for the plume to be discharged and the flow velocity of the horizontal cross-flow, obtain the third characteristic length of the horizontal cross-flow;

[0086] Based on the first characteristic length, the second characteristic length, and the third characteristic length of the horizontal cross-flow, determine that the plume type of the plume to be discharged is the first plume type or the second plume type.

[0087] In this application, the first characteristic length for the horizontal cross-flow is the momentum characteristic length of the current cross-flow, which is calculated by formula (5):

[0088] Formula (5)

[0089] Wherein, represents the first characteristic length for the horizontal cross-flow. is the second initial flux of the plume to be discharged. is the flow velocity for the horizontal tidal current.

[0090] In addition, the second characteristic length for the horizontal cross-flow is the buoyancy characteristic length of the current cross-flow, which is calculated by formula (6):

[0091] Formula (6)

[0092] Wherein, represents the second characteristic length for the horizontal cross-flow. is the third initial flux of the plume to be discharged.

[0093] In addition, the third characteristic length for the horizontal cross-flow is the flow velocity characteristic length of the current cross-flow, which is calculated by formula (7) and formula (8):

[0094] Formula (7)

[0095] Formula (8)

[0096] Wherein, represents the third characteristic length for the horizontal cross-flow. is the target frequency for the plume to be discharged, specifically the Brunt-Väisälä frequency. is the density gradient of seawater in the property parameters of the target area.

[0097] It can be understood that the action of the horizontal cross-flow can affect the downward discharge of the upper plume to a certain extent. Based on the aforementioned formulas (5) to (8), the three characteristic lengths of the horizontal cross-flow in the target area can be obtained conveniently and accurately, and then the plume type of the plume to be discharged can be accurately determined, so as to more accurately ensure that the plume discharged from the upper layer can be captured by the anoxic layer.

[0098] In an alternative solution, determining that the plume type of the plume to be discharged is the first plume type or the second plume type based on the first characteristic length, the second characteristic length, and the third characteristic length for the horizontal cross-flow includes:

[0099] Obtain a first reference value for the plume type of the plume to be discharged based on the product of the second characteristic length and the third characteristic length for the horizontal cross-flow and a first preset value;

[0100] Obtain a second reference value for the plume type of the plume to be discharged based on the first characteristic length for the horizontal cross-flow and a second preset value;

[0101] When the first reference value is less than the second reference value, the plume type of the plume to be discharged is the first plume type;

[0102] When the first reference value is greater than or equal to the second reference value, the plume type of the plume to be discharged is the second plume type.

[0103] In this application, it is assumed that the second characteristic length for the horizontal cross-flow is , the third characteristic length for the horizontal cross-flow is , the first preset value is 2.8 (this value is an empirical value), and the first reference value is S. Then the first reference value can be expressed as:

[0104] Formula (9)

[0105] And, it is assumed that the first characteristic length for the horizontal cross-flow is , the second preset value is 1.3 (this value is an empirical value), and the second reference value is A. Then the second reference value can be expressed as:

[0106] A = Formula (10)

[0107] If S < A, the plume type of the plume to be discharged is the first plume type, that is, the momentum-dominated near-field plume. If S ≥ A, the plume type of the plume to be discharged is the second plume type, that is, the momentum-dominated far-field plume. The judgment of the plume type is realized, the plume mathematical model is further improved, and thus the accuracy of the subsequent emission height calculation is improved.

[0108] In an alternative solution, the obtaining of the first emission height for the plume to be discharged based on the determination result that the plume type of the plume to be discharged is the first plume type or the second plume type includes:

[0109] When the plume type of the plume to be discharged is the first plume type, obtain the first emission height for the plume to be discharged based on the attribute parameters of the target area, the emission parameters of the plume to be discharged, and a first determination relation;

[0110] When the plume type of the plume to be discharged is the second plume type, obtain the first emission height for the plume to be discharged based on the attribute parameters of the target area, the emission parameters of the plume to be discharged, and a second determination relation.

[0111] In this application, when the plume type of the plume to be discharged is the first plume type, the first discharge height of the plume to be discharged is calculated by formula (11), that is, the first determination relationship:

[0112] Formula (11)

[0113] When the plume type of the plume to be discharged is the second plume type, the first discharge height of the plume to be discharged is calculated by formula (12), that is, the second determination relationship:

[0114] Formula (12)

[0115] Wherein, is the first discharge height of the plume to be discharged when it is about to be discharged. and are respectively the third characteristic length and the first characteristic length for the horizontal cross-flow calculated based on the attribute parameters of the target area and the discharge parameters of the plume to be discharged. It can further reduce the complexity of the calculation and improve the overall calculation speed.

[0116] In an alternative solution, the target area includes the discharge layer for the plume to be discharged; the attribute parameters of the target area include the thickness of the discharge layer and the initial discharge height of the plume to be discharged; obtaining the target discharge height of the plume to be discharged based on the first discharge height, the attribute parameters of the target area, and the discharge parameters of the plume to be discharged includes:

[0117] When the first discharge height is less than the difference between the initial discharge height and the thickness of the discharge layer, based on the first preset target step, obtain the target discharge height of the plume to be discharged; the target discharge height of the plume to be discharged is less than the initial discharge height;

[0118] When the first discharge height is greater than the initial discharge height, based on the second preset target step, obtain the target discharge height of the plume to be discharged; the target discharge height of the plume to be discharged is greater than the initial discharge height.

[0119] In this application, as shown in Figure 2 , assume that the first discharge height of the plume to be discharged is , the initial discharge height is , and the thickness (height) of the discharge (oxygen-deficient) layer is .

[0120] When , the current artificial downdraft plume cannot be discharged into the oxygen-deficient layer, and the discharge height needs to be reduced. Then, based on the first preset target step (which can be custom-set), the initial discharge height is reduced to obtain the final target discharge height.

[0121] When At this time, if the impact force of the current artificial downflow plume is too large, it will scour the seabed sediment and cause pollution. At this time, the discharge height needs to be increased. Then, based on the second preset target step length (which can be customized, the same as or different from the first preset target step length), the initial discharge height is increased to obtain the final target discharge height.

[0122] In an alternative solution, it further includes:

[0123] When the first discharge height is greater than the difference between the initial discharge height and the thickness of the discharge layer, and the first discharge height is less than the initial discharge height, the target discharge height of the plume to be discharged is equal to the initial discharge height.

[0124] In this application, as described above, when At this time, the current artificial downflow plume can be discharged into the hypoxic layer without scouring the sediment, and there is no need to adjust the discharge height, that is, the target discharge height is equal to the initial discharge height. The plume to be discharged can be discharged based on the initial discharge height, thereby effectively alleviating the hypoxia problem in the hypoxic layer.

[0125] The embodiment of this application also provides a device for determining the discharge height of a plume. The device is applied to a target area, and the target area includes a plume to be discharged; as Figure 3 shown, the device includes:

[0126] The first acquisition unit 301 is configured to acquire the attribute parameters of the target area and the discharge parameters of the plume to be discharged;

[0127] The first determination unit 302 is configured to determine that the plume type of the plume to be discharged is the first plume type or the second plume type based on the attribute parameters of the target area and the discharge parameters of the plume to be discharged;

[0128] The second acquisition unit 303 is configured to obtain the first discharge height for the plume to be discharged based on the determination result that the plume type of the plume to be discharged is the first plume type or the second plume type;

[0129] The third acquisition unit 304 is configured to obtain the target discharge height of the plume to be discharged based on the first discharge height, the attribute parameters of the target area, and the discharge parameters of the plume to be discharged.

[0130] In an alternative solution, the first determination unit 302 is configured to obtain a target discharge velocity of the plume to be discharged based on the attribute parameters of the target area and the discharge parameters of the plume to be discharged; obtain a first initial flux and a second initial flux of the plume to be discharged based on the target discharge velocity of the plume to be discharged and the discharge parameters; obtain a third initial flux of the plume to be discharged based on the first initial flux of the plume to be discharged, the attribute parameters of the target area, and the discharge parameters of the plume to be discharged; and determine that the plume type of the plume to be discharged is a first plume type or a second plume type based on the second initial flux and the third initial flux.

[0131] In an alternative solution, the target area further includes a horizontal cross-flow, and the attribute parameters of the target area include the flow velocity of the horizontal cross-flow; the first determination unit 302 is configured to obtain a first characteristic length of the horizontal cross-flow based on the second initial flux of the plume to be discharged and the flow velocity of the horizontal cross-flow; obtain a second characteristic length of the horizontal cross-flow based on the third initial flux of the plume to be discharged and the flow velocity of the horizontal cross-flow; obtain a target frequency of the plume to be discharged based on the attribute parameters of the target area; obtain a third characteristic length of the horizontal cross-flow based on the target frequency of the plume to be discharged and the flow velocity of the horizontal cross-flow; and determine that the plume type of the plume to be discharged is a first plume type or a second plume type based on the first characteristic length, the second characteristic length, and the third characteristic length of the horizontal cross-flow.

[0132] In an alternative solution, the first determination unit 302 is configured to obtain a first reference value of the plume type of the plume to be discharged based on the product of the second characteristic length and the third characteristic length of the horizontal cross-flow and a first preset value; obtain a second reference value of the plume type of the plume to be discharged based on the first characteristic length of the horizontal cross-flow and a second preset value; when the first reference value is less than the second reference value, the plume type of the plume to be discharged is a first plume type; and when the first reference value is greater than or equal to the second reference value, the plume type of the plume to be discharged is a second plume type.

[0133] In an alternative solution, when the plume type of the plume to be discharged is a first plume type, the second acquisition unit 303 is configured to obtain a first discharge height of the plume to be discharged based on the attribute parameters of the target area, the discharge parameters of the plume to be discharged, and a first determination relationship; and when the plume type of the plume to be discharged is a second plume type, obtain a first discharge height of the plume to be discharged based on the attribute parameters of the target area, the discharge parameters of the plume to be discharged, and a second determination relationship.

[0134] In an alternative solution, the target area includes an emission layer for the plume to be emitted; the attribute parameters of the target area include the thickness of the emission layer and the initial emission height of the plume to be emitted; the third acquisition unit 304 is configured to, when the first emission height is less than the difference between the initial emission height and the thickness of the emission layer, obtain the target emission height of the plume to be emitted based on a first preset target step size; the target emission height of the plume to be emitted is less than the initial emission height; when the first emission height is greater than the initial emission height, obtain the target emission height of the plume to be emitted based on a second preset target step size; the target emission height of the plume to be emitted is greater than the initial emission height.

[0135] In an alternative solution, when the first emission height is greater than the difference between the initial emission height and the thickness of the emission layer and the first emission height is less than the initial emission height, the target emission height of the plume to be emitted is equal to the initial emission height.

[0136] It should be noted that for the plume emission height determination device according to the embodiments of the present application, since the principle of solving problems by this plume emission height determination device is similar to the aforementioned plume emission height determination method, the implementation process, implementation principle, and beneficial effects of the plume emission height determination device can all refer to the description of the implementation process, implementation principle, and beneficial effects of the aforementioned method, and repeated parts will not be elaborated.

[0137] According to the embodiments of the present application, the present application also provides an electronic device and a readable storage medium.

[0138] Figure 4 FIG. shows a schematic block diagram of an exemplary electronic device 400 that can be used to implement the embodiments of the present application. The electronic device is intended to represent various forms of digital computers, such as, laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as, personal digital processors, cellular phones, smart phones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are only examples and are not intended to limit the implementation of the present application described herein and / or claimed.

[0139] As Figure 4As shown, the electronic device 400 includes a computing unit 401, which can perform various appropriate actions and processes according to a computer program stored in a read-only memory (ROM) 402 or a computer program loaded from a storage unit 408 into a random access memory (RAM) 403. In the RAM 403, various programs and data required for the operation of the electronic device 400 can also be stored. The computing unit 401, the ROM 402, and the RAM 403 are connected to each other via a bus 404. An input / output (I / O) interface 405 is also connected to the bus 404.

[0140] Multiple components in the electronic device 400 are connected to the I / O interface 405, including: an input unit 406, such as a keyboard, a mouse, etc.; an output unit 407, such as various types of displays, speakers, etc.; a storage unit 408, such as a magnetic disk, an optical disc, etc.; and a communication unit 409, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 409 allows the electronic device 400 to exchange information / data with other devices via a computer network such as the Internet and / or various telecommunication networks.

[0141] The computing unit 401 can be various general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of the computing unit 401 include but are not limited to a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various computing units running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The computing unit 401 executes the various methods and processes described above, such as the plume emission height determination method. For example, in some embodiments, the plume emission height determination method can be implemented as a computer software program, which is tangibly contained in a machine-readable medium, such as the storage unit 408. In some embodiments, part or all of the computer program can be loaded and / or installed onto the electronic device 400 via the ROM 402 and / or the communication unit 409. When the computer program is loaded into the RAM 403 and executed by the computing unit 401, one or more steps of the plume emission height determination method described above can be executed. Alternatively, in other embodiments, the computing unit 401 can be configured to execute the plume emission height determination method by any other appropriate means (e.g., by means of firmware).

[0142] The various embodiments of the systems and techniques described above in this specification can be implemented in digital electronic circuitry, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on a chip (SOCs), complex programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include: being implemented in one or more computer programs that are executable and / or interpretable on a programmable system including at least one programmable processor, which can be a special-purpose or general-purpose programmable processor that receives data and instructions from, and transmits data and instructions to, a storage system, at least one input device, and at least one output device.

[0143] The program code for implementing the methods of the present application can be written in any combination of one or more programming languages. These program codes can be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing device, such that the program codes, when executed by the processor or controller, cause the functions / operations specified in the flowchart and / or block diagram to be implemented. The program code can be executed entirely on the machine, partly on the machine, as a stand-alone software package partly on the machine and partly on a remote machine, or entirely on the remote machine or server.

[0144] In the context of this application, a machine-readable medium can be a tangible medium that can contain or store a program for use by or in connection with an instruction execution system, apparatus, or device. A machine-readable medium can be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium can include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0145] To provide interaction with a user, the systems and techniques described herein can be implemented on a computer having: a display device for displaying information to the user (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor); and a keyboard and a pointing device (e.g., a mouse or a trackball) through which the user can provide input to the computer. Other kinds of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including acoustic input, speech input, or tactile input).

[0146] The systems and techniques described herein can be implemented in a computing system including backend components (e.g., as a data server), or a computing system including middleware components (e.g., an application server), or a computing system including frontend components (e.g., a user computer having a graphical user interface or a web browser through which the user can interact with an implementation of the systems and techniques described herein), or a computing system including any combination of such backend components, middleware components, or frontend components. The components of the system can be interconnected to each other by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local area network (LAN), wide area network (WAN), and the Internet.

[0147] A computer system can include a client and a server. The client and the server are generally far from each other and typically interact through a communication network. The relationship between the client and the server is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, or a server of a distributed system, or a server incorporating a blockchain.

[0148] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps recited in this application can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solutions disclosed in this application can be achieved. No limitations are set forth herein.

[0149] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" can explicitly or implicitly include at least one of such features. In the description of this application, "a plurality of" means two or more unless otherwise specifically defined.

[0150] As described above, it is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims described above.

Claims

1. A method for determining the discharge height of a plume, characterized in that, The method is applied to a target area, and the target area includes a plume to be discharged; the method includes: Obtaining the attribute parameters of the target area and the discharge parameters of the plume to be discharged; wherein, the target area is a marine area, and the attribute parameters of the target area include the density gradient of seawater in the marine area, the density of seawater in the anoxic layer, the thickness of the anoxic layer, the current horizontal tidal current velocity, and the dynamic viscosity of water; the discharge parameters of the plume to be discharged include the radius of the diversion pipe for plume discharge, the length of the diversion pipe, the inner wall roughness of the diversion pipe, the initial discharge height and discharge density of the plume to be discharged, the inlet height above the diversion pipe for plume discharge, the outlet height below the diversion pipe for plume discharge, the curvature radius of the elbow of the diversion pipe for plume discharge, and the density of seawater at the inlet above the diversion pipe; Based on the attribute parameters of the target area and the discharge parameters of the plume to be discharged, obtaining the target discharge velocity of the plume to be discharged; Based on the target discharge velocity of the plume to be discharged and the discharge parameters, obtaining the first initial flux and the second initial flux of the plume to be discharged; Based on the first initial flux of the plume to be discharged, the attribute parameters of the target area, and the discharge parameters of the plume to be discharged, obtaining the third initial flux of the plume to be discharged; Based on the second initial flux and the third initial flux, determining that the plume type of the plume to be discharged is the first plume type or the second plume type; Based on the determination result that the plume type of the plume to be discharged is the first plume type or the second plume type, obtaining the first discharge height for the plume to be discharged; Based on the first discharge height, the attribute parameters of the target area, and the discharge parameters of the plume to be discharged, obtain the target discharge height of the plume to be discharged; wherein, the target discharge velocity of the plume to be discharged is obtained by the formula wherein, w 0 is the target discharge velocity of the plume to be discharged, including ρ i and ρ 0, where ρ 0 is the discharge density of the plume to be discharged, ρ i is the seawater density at the upper inlet of the draft tube, r 0 is the radius of the draft tube for plume discharge, is the current horizontal tidal current velocity, z i is the height of the upper inlet of the draft tube for plume discharge, z o is the height of the lower outlet of the draft tube for plume discharge, R is the curvature radius of the elbow of the draft tube for plume discharge, L is the length of the draft tube for plume discharge, δ is the inner wall roughness of the draft tube for plume discharge, Re is the Reynolds number, μ is the dynamic viscosity of water, ξ t ( R , L , r 0, δ , Re ) is the total resistance loss generated during the plume discharge process, is the acceleration due to gravity.

2. The method according to claim 1, characterized in that, The target area further includes a horizontal cross-flow, and the attribute parameters of the target area include the flow velocity for the horizontal cross-flow; the determining that the plume type of the plume to be discharged is the first plume type or the second plume type based on the second initial flux and the third initial flux includes: Based on the second initial flux of the plume to be discharged and the flow velocity for the horizontal cross-flow, obtaining the first characteristic length for the horizontal cross-flow; Based on the third initial flux of the plume to be discharged and the flow velocity for the horizontal cross-flow, obtaining the second characteristic length for the horizontal cross-flow; Based on the attribute parameters of the target area, obtaining the target frequency for the plume to be discharged; Based on the target frequency for the plume to be discharged and the flow velocity for the horizontal cross-flow, obtaining the third characteristic length for the horizontal cross-flow; Based on the first characteristic length, the second characteristic length, and the third characteristic length for the horizontal cross-flow, determining that the plume type of the plume to be discharged is the first plume type or the second plume type.

3. The method according to claim 2, wherein The determining that the plume type of the plume to be discharged is the first plume type or the second plume type based on the first characteristic length, the second characteristic length, and the third characteristic length for the horizontal cross-flow includes: Based on the product of the second characteristic length and the third characteristic length for the horizontal cross-flow and a first preset value, obtaining the first reference value for the plume type of the plume to be discharged; Based on the first characteristic length for the horizontal cross-flow and a second preset value, obtaining the second reference value for the plume type of the plume to be discharged; When the first reference value is less than the second reference value, the plume type of the plume to be discharged is the first plume type; When the first reference value is greater than or equal to the second reference value, the plume type of the plume to be discharged is the second plume type.

4. The method according to any one of claims 1 to 3, characterized in that, Obtaining a first discharge height for the plume to be discharged based on the determination result that the plume type of the plume to be discharged is the first plume type or the second plume type includes: When the plume type of the plume to be discharged is the first plume type, obtaining a first discharge height for the plume to be discharged based on the attribute parameters of the target area, the discharge parameters of the plume to be discharged, and a first determination relation; When the plume type of the plume to be discharged is the second plume type, obtaining a first discharge height for the plume to be discharged based on the attribute parameters of the target area, the discharge parameters of the plume to be discharged, and a second determination relation.

5. The method according to any one of claims 1 to 3, characterized in that, The target area includes a discharge layer for the plume to be discharged; the attribute parameters of the target area include the thickness of the discharge layer and the initial discharge height of the plume to be discharged; obtaining a target discharge height of the plume to be discharged based on the first discharge height, the attribute parameters of the target area, and the discharge parameters of the plume to be discharged includes: When the first discharge height is less than the difference between the initial discharge height and the thickness of the discharge layer, obtaining a target discharge height of the plume to be discharged based on a first preset target step; the target discharge height of the plume to be discharged is less than the initial discharge height; When the first discharge height is greater than the initial discharge height, obtaining a target discharge height of the plume to be discharged based on a second preset target step; the target discharge height of the plume to be discharged is greater than the initial discharge height.

6. The method according to claim 5, wherein Further includes: When the first discharge height is greater than the difference between the initial discharge height and the thickness of the discharge layer, and the first discharge height is less than the initial discharge height, the target discharge height of the plume to be discharged is equal to the initial discharge height.

7. An apparatus for determining the discharge height of a plume, characterized in that The device is applied to a target area, the target area includes a plume to be discharged; the device includes: A first acquisition unit, configured to acquire the attribute parameters of the target area and the discharge parameters of the plume to be discharged; wherein, the target area is a marine area, and the attribute parameters of the target area include the density gradient of seawater in the marine area, the density of seawater in the anoxic layer, the thickness of the anoxic layer, the current horizontal tidal current velocity, the dynamic viscosity of water; the discharge parameters of the plume to be discharged include the radius of the guide pipe for plume discharge, the length of the guide pipe, the inner wall roughness of the guide pipe, the initial discharge height and discharge density of the plume to be discharged, the height of the upper inlet of the guide pipe for plume discharge, the height of the lower outlet of the guide pipe for plume discharge, the curvature radius of the elbow of the guide pipe for plume discharge, the density of seawater at the upper inlet of the guide pipe. The first determination unit is configured to obtain the target discharge velocity of the plume to be discharged based on the attribute parameters of the target area and the discharge parameters of the plume to be discharged; obtain the first initial flux and the second initial flux of the plume to be discharged based on the target discharge velocity of the plume to be discharged and the discharge parameters; obtain the third initial flux of the plume to be discharged based on the first initial flux of the plume to be discharged, the attribute parameters of the target area and the discharge parameters of the plume to be discharged; determine whether the plume type of the plume to be discharged is the first plume type or the second plume type based on the second initial flux and the third initial flux; wherein, the target discharge velocity of the plume to be discharged is obtained by using the formula where w 0 is the target discharge velocity of the plume to be discharged, includes ρ i and ρ 0, where ρ 0 is the discharge density of the plume to be discharged, ρ i is the seawater density at the upper inlet of the diversion pipe, r 0 is the radius of the diversion pipe for plume discharge, is the current horizontal tidal current velocity, z i is the height of the upper inlet of the diversion pipe for plume discharge, z o is the height of the lower outlet of the diversion pipe for plume discharge, R is the curvature radius of the elbow of the diversion pipe for plume discharge, L is the length of the diversion pipe for plume discharge, δ is the inner wall roughness of the diversion pipe for plume discharge, Re is the Reynolds number, μ is the dynamic viscosity of water, ξ t ( R , L , r 0, δ , Re ) is the total resistance loss generated during the plume discharge process, is the acceleration due to gravity; A second acquisition unit, configured to obtain a first discharge height for the plume to be discharged based on the determination result that the plume type of the plume to be discharged is the first plume type or the second plume type; A third acquisition unit, configured to obtain a target discharge height of the plume to be discharged based on the first discharge height, the attribute parameters of the target area, and the discharge parameters of the plume to be discharged.

8. An electronic device, characterized in that, Includes: At least one processor; And A memory communicatively connected to the at least one processor; wherein, The memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the method according to any one of claims 1-6.

9. A non-transitory computer-readable storage medium storing computer instructions, characterized in that, The computer instructions are for causing a computer to execute the method according to any one of claims 1-6.

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