Method, device, electronic device and storage medium for detecting phosphorus migration in rivers

Abstract

The present application provides a method, device, electronic device and storage medium for detecting phosphorus migration in a river. The method includes: determining the desorption coefficient of phosphorus in the river to be tested according to the water attribute information of the river to be tested; constructing a simulation model of the phosphorus migration process of the river to be tested according to the experimental data of the phosphorus tracer in the water body and the desorption coefficient of phosphorus in the river to be tested; simulating the phosphorus migration process of the river to be tested based on the simulation model of the phosphorus migration process of the river to be tested to obtain the detection result of phosphorus migration in the river to be tested. By constructing a simulation model of the phosphorus migration process of the river to be tested according to the experimental data of the phosphorus tracer in the water body of the river to be tested and the desorption coefficient of phosphorus in the river to be tested, the model can accurately describe the migration and transformation process of phosphorus in the river to be tested, thereby improving the accuracy of the final phosphorus migration detection result in the river.

Description

Technical Field

[0001] The present application relates to the technical field of engineering simulation and numerical simulation, and in particular to a method, device, electronic equipment and storage medium for detecting the migration of phosphorus in a river. Background Art

[0002] Phosphorus is a key factor in eutrophication of water bodies. The migration and transformation process of phosphorus in water bodies has a vital impact on the ecological environment of rivers. The method of controlling phosphorus in water bodies includes controlling its migration process. The principle is to intercept and transform it through transmission channels. It is necessary to study its migration process and analyze the spatial and temporal distribution of phosphorus in water bodies.

[0003] Considering the sources of phosphorus in natural rivers and its different forms, on the one hand, the adsorption of phosphorus by suspended sediment causes the super-diffusion of phosphorus with the sediment; on the other hand, with the erosion and siltation of sediment, phosphorus is deposited and re-released on the riverbed surface. Traditional water quality models are difficult to describe the migration and transformation process of phosphorus in rivers, and therefore cannot guarantee the accuracy of the detection results of phosphorus migration in rivers. Summary of the invention

[0004] The present application provides a method, device, electronic device and storage medium for detecting phosphorus migration in rivers, so as to solve the defects of the prior art that the accuracy of the detection results of phosphorus migration in rivers cannot be guaranteed.

[0005] The first aspect of the present application provides a method for detecting phosphorus migration in a river, comprising:

[0006] Obtain water property information of the river to be tested and experimental data of phosphorus tracer in water;

[0007] Determining the desorption coefficient of phosphorus of the river to be tested according to the water attribute information of the river to be tested;

[0008] Constructing a simulation model of the phosphorus migration process of the river to be tested based on the experimental data of the phosphorus tracer in the water body and the desorption coefficient of phosphorus in the river to be tested;

[0009] Based on the simulation model of the phosphorus migration process of the river to be tested, the phosphorus migration process of the river to be tested is simulated to obtain the phosphorus migration detection result in the river to be tested; wherein the phosphorus migration detection result at least includes the temporal and spatial distribution result of phosphorus.

[0010] Optionally, constructing a simulation model of phosphorus migration process of the river to be tested based on the experimental data of the phosphorus tracer in the water body and the desorption coefficient of phosphorus of the river to be tested includes:

[0011] According to the experimental data of the phosphorus element tracer in the water body, invert the time truncated fractional derivative order, the space truncated fractional derivative order, the truncation coefficient and the super diffusion coefficient of the river to be tested;

[0012] According to the desorption coefficient of phosphorus in the river to be tested, the order of time-truncated fractional derivative, the order of space-truncated fractional derivative, the truncation coefficient and the superdiffusion coefficient, a simulation model of the phosphorus migration process of the river to be tested is constructed;

[0013] Among them, the order of the time-truncated fractional derivative represents the retention characteristics of the phosphorus element in the river to be tested under the influence of sediment sedimentation and cross-section obstruction, the order of the spatial-truncated fractional derivative represents the super-diffusion characteristics of the phosphorus element in the river to be tested along the water flow direction due to the adsorption of suspended sediment, and the truncation coefficient represents the riverbed scouring and silting state of the river to be tested.

[0014] Optionally, the phosphorus migration process simulation model of the river to be tested is constructed according to the desorption coefficient of phosphorus in the river to be tested, the time truncation fractional derivative order, the space truncation fractional derivative order, the truncation coefficient and the super diffusion coefficient, including:

[0015] Based on the following expression, a simulation model of phosphorus migration process of the river to be tested is constructed:

[0016]

[0017] Wherein, u represents the phosphorus concentration of the river to be tested, t represents the current detection time, and x represents the spatial position of the detection point of the river to be tested. represents the time-truncated fractional derivative of the Caputo type at the initial time, α represents the order of the time-truncated fractional derivative, λ represents the truncation coefficient, represents the Riemann-Liouville type spatial truncated fractional derivative at the upper boundary position of the river to be tested, β represents the order of the spatial truncated fractional derivative, D represents the superdiffusion coefficient, d represents the desorption coefficient of phosphorus by the river to be tested, and v represents the average flow velocity of the river to be tested.

[0018] Optionally, the simulation model of the phosphorus migration process of the river to be tested is used to simulate the phosphorus migration process of the river to be tested to obtain the detection result of phosphorus migration in the river to be tested, including:

[0019] Inputting the current detection time and the spatial position of the target detection point into the simulation model of the phosphorus migration process of the river to be detected;

[0020] Based on the simulation model of the phosphorus migration process of the river to be tested, the phosphorus migration process of the target detection point in the river to be tested is simulated according to the current detection time and the spatial position of the target detection point to obtain the phosphorus migration detection result of the target detection point in the river to be tested.

[0021] Optionally, determining the desorption coefficient of phosphorus of the river to be tested according to the water attribute information of the river to be tested includes:

[0022] Conducting an indoor water tank experiment on the river to be tested according to the water attribute information of the river to be tested, and obtaining indoor water tank experiment data;

[0023] The indoor water tank experimental data are analyzed to obtain the desorption coefficient of phosphorus element of the river to be tested.

[0024] Optionally, the water attribute information includes at least the water pH value, water temperature, sediment concentration, sediment particle properties and porosity of the riverbed mud of the river to be tested.

[0025] Optionally, also include:

[0026] The eutrophication degree of the water body of the river to be tested is determined according to the detection result of phosphorus migration in the river to be tested.

[0027] The second aspect of the present application provides a device for detecting phosphorus migration in a river, comprising:

[0028] An acquisition module is used to obtain water attribute information of the river to be tested and experimental data of phosphorus tracer in the water;

[0029] A determination module, used to determine the desorption coefficient of phosphorus of the river to be tested according to the water attribute information of the river to be tested;

[0030] A model building module, used to build a simulation model of the phosphorus migration process of the river to be tested based on the experimental data of the phosphorus tracer in the water body and the desorption coefficient of phosphorus in the river to be tested;

[0031] A detection module is used to simulate the phosphorus migration process of the river to be tested based on a simulation model of the phosphorus migration process of the river to be tested, so as to obtain a detection result of phosphorus migration in the river to be tested; wherein the phosphorus migration detection result at least includes a spatiotemporal distribution result of phosphorus.

[0032] Optionally, the model building module is specifically used to:

[0033] According to the experimental data of the phosphorus tracer in the water body, invert the time truncated fractional derivative order, the space truncated fractional derivative order, the truncation coefficient and the super diffusion coefficient of the river to be tested;

[0034] According to the desorption coefficient of phosphorus in the river to be tested, the order of time-truncated fractional derivative, the order of space-truncated fractional derivative, the truncation coefficient and the superdiffusion coefficient, a simulation model of the phosphorus migration process of the river to be tested is constructed;

[0035] Among them, the order of the time-truncated fractional derivative represents the retention characteristics of the phosphorus element in the river to be tested under the influence of sediment sedimentation and cross-section obstruction, the order of the spatial-truncated fractional derivative represents the super-diffusion characteristics of the phosphorus element in the river to be tested along the water flow direction due to the adsorption of suspended sediment, and the truncation coefficient represents the riverbed scouring and silting state of the river to be tested.

[0036] Optionally, the model building module is specifically used to:

[0037] Based on the following expression, a simulation model of phosphorus migration process of the river to be tested is constructed:

[0038]

[0039] Wherein, u represents the phosphorus concentration of the river to be tested, t represents the current detection time, and x represents the spatial position of the detection point of the river to be tested. represents the time-truncated fractional derivative of the Caputo type at the initial time, α represents the order of the time-truncated fractional derivative, λ represents the truncation coefficient, represents the Riemann-Liouville type spatial truncated fractional derivative at the upper boundary position of the river to be tested, β represents the order of the spatial truncated fractional derivative, D represents the superdiffusion coefficient, d represents the desorption coefficient of phosphorus by the river to be tested, and v represents the average flow velocity of the river to be tested.

[0040] Optionally, the detection module is specifically used to:

[0041] Inputting the current detection time and the spatial position of the target detection point into the simulation model of the phosphorus migration process of the river to be detected;

[0042] Based on the simulation model of the phosphorus migration process of the river to be tested, the phosphorus migration process of the target detection point in the river to be tested is simulated according to the current detection time and the spatial position of the target detection point to obtain the phosphorus migration detection result of the target detection point in the river to be tested.

[0043] Optionally, the determining module is specifically used to:

[0044] Conducting an indoor water tank experiment on the river to be tested according to the water attribute information of the river to be tested, and obtaining indoor water tank experiment data;

[0045] The indoor water tank experimental data are analyzed to obtain the desorption coefficient of phosphorus element of the river to be tested.

[0046] Optionally, the water attribute information includes at least the water pH value, water temperature, sediment concentration, sediment particle properties and porosity of the riverbed mud of the river to be tested.

[0047] Optionally, the detection module is further used to:

[0048] The eutrophication degree of the water body of the river to be tested is determined according to the detection result of phosphorus migration in the river to be tested.

[0049] A third aspect of the present application provides an electronic device, comprising: at least one processor and a memory;

[0050] The memory stores computer-executable instructions;

[0051] The at least one processor executes the computer-executable instructions stored in the memory, so that the at least one processor performs the method described in the first aspect and various possible designs of the first aspect.

[0052] A fourth aspect of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions. When a processor executes the computer-executable instructions, the method described in the first aspect and various possible designs of the first aspect are implemented.

[0053] The technical solution of this application has the following advantages:

[0054] The present application provides a method, device, electronic device and storage medium for detecting phosphorus migration in a river. The method includes: obtaining water body property information of the river to be tested and experimental data of phosphorus tracer in the water body; determining the desorption coefficient of phosphorus in the river to be tested according to the water body property information of the river to be tested; constructing a simulation model of phosphorus migration process in the river to be tested according to the experimental data of phosphorus tracer in the water body and the desorption coefficient of phosphorus in the river to be tested; simulating the phosphorus migration process in the river to be tested based on the simulation model of phosphorus migration process in the river to be tested to obtain the detection result of phosphorus migration in the river to be tested; wherein the detection result of phosphorus migration at least includes the spatiotemporal distribution result of phosphorus. The method provided by the above scheme constructs a simulation model of phosphorus migration process in the river to be tested according to the experimental data of phosphorus tracer in the water body of the river to be tested and the desorption coefficient of phosphorus in the river to be tested, so that the model can accurately describe the migration and transformation process of phosphorus in the river to be tested, thereby improving the accuracy of the final phosphorus migration detection result in the river. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application, and a person skilled in the art can also obtain other drawings based on these drawings.

[0056] Figure 1 This is a schematic diagram of the structure of the phosphorus migration detection system in rivers based on the embodiments of the present application;

[0057] Figure 2 A schematic diagram of a flow chart of a method for detecting phosphorus migration in a river provided in an embodiment of the present application;

[0058] Figure 3 A schematic diagram of the structure of a device for detecting phosphorus migration in a river provided in an embodiment of the present application;

[0059] Figure 4 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0060] The above drawings have shown clear embodiments of the present application, which will be described in more detail below. These drawings and text descriptions are not intended to limit the scope of the present disclosure in any way, but to illustrate the concepts of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0062] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the following embodiments, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0063] For the analysis of the temporal and spatial distribution of phosphorus in water bodies, the sources of phosphorus in natural rivers and its different forms are taken into consideration. On the one hand, the suspended sediment adsorbs phosphorus, and the phosphorus element diffuses with the sediment. On the other hand, with the scouring and siltation of sediment, phosphorus is deposited and re-released on the riverbed surface. Traditional water quality models are difficult to describe the migration and transformation process of phosphorus in rivers, and therefore cannot guarantee the accuracy of the detection results of phosphorus migration in rivers.

[0064] In view of the above problems, the phosphorus migration detection method, device, electronic device and storage medium provided in the embodiment of the present application obtain the water body property information of the river to be tested and the experimental data of the phosphorus tracer in the water body; determine the desorption coefficient of the phosphorus element in the river to be tested according to the water body property information of the river to be tested; construct a simulation model of the phosphorus migration process of the river to be tested according to the experimental data of the phosphorus tracer in the water body and the desorption coefficient of the phosphorus element in the river to be tested; based on the simulation model of the phosphorus migration process of the river to be tested, simulate the phosphorus migration process of the river to be tested to obtain the detection result of the phosphorus migration in the river to be tested; wherein the phosphorus migration detection result at least includes the spatiotemporal distribution result of the phosphorus element. The method provided by the above scheme constructs a simulation model of the phosphorus migration process of the river to be tested according to the experimental data of the phosphorus tracer in the water body of the river to be tested and the desorption coefficient of the phosphorus element in the river to be tested, so that the model can accurately describe the migration and transformation process of the phosphorus element in the river to be tested, thereby improving the accuracy of the phosphorus migration detection result in the river to be tested.

[0065] The following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments. The embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0066] First, the structure of the phosphorus migration detection system in rivers based on this application is described:

[0067] The method, device, electronic device and storage medium for detecting phosphorus migration in rivers provided in the embodiments of the present application are suitable for detecting abnormal phosphorus migration in natural rivers. Figure 1 The figure is a schematic diagram of the structure of the phosphorus migration detection system in the river based on the embodiment of the present application, which mainly includes a river, a data acquisition device and a phosphorus migration detection device in the river. Specifically, the water attribute information of the river and the experimental data of the phosphorus tracer in the water can be collected based on the data acquisition device, and the collected data can be sent to the phosphorus migration detection device in the river. The phosphorus migration detection device in the river detects the abnormal migration process of phosphorus in the river according to the obtained data.

[0068] The embodiment of the present application provides a method for detecting phosphorus migration in a river, which is used to detect abnormal phosphorus migration in a natural river. The execution subject of the embodiment of the present application is an electronic device, such as a server, a desktop computer, a laptop computer, a tablet computer, and other electronic devices that can be used to detect abnormal phosphorus migration in a natural river.

[0069] like Figure 2 FIG. 1 is a flow chart of a method for detecting phosphorus migration in a river provided in an embodiment of the present application, the method comprising:

[0070] Step 201, obtaining water attribute information of the river to be tested and water phosphorus tracer experimental data.

[0071] The water attribute information of the river to be tested includes at least the pH value, water temperature, sediment concentration, sediment particle properties and riverbed mud porosity of the river to be tested. The water phosphorus tracer experimental data can be obtained by conducting a water phosphorus tracer experiment on the river to be tested.

[0072] Step 202: Determine the desorption coefficient of phosphorus of the river to be tested according to the water attribute information of the river to be tested.

[0073] Specifically, in one embodiment, an indoor water tank experiment can be carried out on the river to be tested according to the water property information of the river to be tested to obtain indoor water tank experiment data; the indoor water tank experiment data can be analyzed to obtain the desorption coefficient of phosphorus of the river to be tested.

[0074] It should be noted that the desorption coefficient of phosphorus in the tested river represents the exchange rate of phosphorus between the water body and the pore water of the sediment.

[0075] Step 203, constructing a simulation model of the phosphorus migration process of the river to be tested based on the experimental data of the phosphorus tracer in the water body and the desorption coefficient of phosphorus in the river to be tested.

[0076] Specifically, based on the experimental data of phosphorus tracer in water bodies, the retention effect of the river to be tested on phosphorus and the super-diffusion characteristics of phosphorus in the river to be tested can be determined, and then the desorption coefficient of phosphorus in the river to be tested can be further combined to construct a simulation model of the phosphorus migration process of the river to be tested. The simulation model of the phosphorus migration process can specifically be a spatiotemporal fractional-order convection-diffusion model containing a desorption term that can describe the migration process of phosphorus in the river to be tested.

[0077] Step 204, based on the simulation model of the phosphorus migration process of the river to be tested, simulate the phosphorus migration process of the river to be tested to obtain the detection result of the phosphorus migration in the river to be tested.

[0078] Among them, the phosphorus element migration detection results at least include the temporal and spatial distribution results of the phosphorus element.

[0079] Specifically, based on the simulation model of phosphorus migration process in the tested river, the migration process of phosphorus in the tested river over time can be simulated to obtain the phosphorus concentration at each detection point in the tested river at different times, that is, the spatiotemporal distribution result of phosphorus.

[0080] Furthermore, in one embodiment, the eutrophication level of the water body of the river to be tested can be determined based on the detection result of phosphorus migration in the river to be tested.

[0081] Specifically, the eutrophication level of the water body at each location in the river to be tested can be dynamically evaluated according to the preset water eutrophication evaluation standard and the real-time detection results of phosphorus migration in the river to be tested.

[0082] On the basis of the above embodiments, the phosphorus transport process in the river is affected by the adsorption of suspended sediment and the adsorption and desorption of phosphorus by the riverbed mud. In addition to the downward migration affected by convection and diffusion, there are three processes: local retention, super diffusion along the flow direction, and material exchange with the bottom mud. Therefore, in order to ensure the reliability of the nitrate transport process simulation model, as an implementable method, in one embodiment, according to the experimental data of the phosphorus element tracer in the water body and the desorption coefficient of the phosphorus element of the river to be tested, a simulation model of the phosphorus element migration process of the river to be tested is constructed, including:

[0083] Step 2031, inverting the time cutoff fractional derivative order, space cutoff fractional derivative order, cutoff coefficient and super diffusion coefficient of the river to be tested according to the experimental data of phosphorus tracer in water body;

[0084] Step 2032, constructing a simulation model of the phosphorus migration process of the river to be tested based on the desorption coefficient of phosphorus in the river to be tested, the order of the time-truncated fractional derivative, the order of the space-truncated fractional derivative, the truncation coefficient and the superdiffusion coefficient.

[0085] Among them, the order of the time-truncated fractional derivative represents the retention characteristics of phosphorus in the river to be tested under the influence of sediment sedimentation and section obstruction, the order of the spatial-truncated fractional derivative represents the super-diffusion characteristics of phosphorus in the river to be tested along the direction of water flow due to the adsorption of suspended sediment, and the truncation coefficient represents the riverbed scouring and silting state of the river to be tested.

[0086] Specifically, based on a preset fitting algorithm and according to the experimental data of phosphorus tracer in the water body of the river to be tested, the retention characteristics of phosphorus in the river to be tested under the influence of sediment sedimentation and section obstruction, the super-diffusion characteristics of phosphorus along the water flow direction due to the adsorption of suspended sediment, and the scouring and silting state of the riverbed of the river to be tested can be fitted, thereby obtaining the order of time-truncated fractional derivative, space-truncated fractional derivative, truncation coefficient and super-diffusion coefficient of the river to be tested.

[0087] Specifically, in one embodiment, a simulation model of the phosphorus migration process of the river to be tested can be constructed based on the following expression:

[0088]

[0089] Among them, u represents the phosphorus concentration of the river to be tested, r represents the current detection time, and x represents the spatial position of the detection point of the river to be tested. represents the time-truncated fractional derivative of the Caputo type at the initial moment, α represents the order of the time-truncated fractional derivative, 0<α<1, the lower the value of α, the more obvious the phosphorus retention phenomenon, λ represents the truncation coefficient, λ≥0, the larger the value of λ, the closer the riverbed is to the erosion and deposition equilibrium state, represents the Riemann-Liouville type spatial truncated fractional derivative at the upper boundary of the river to be tested, b represents the upper boundary of the river to be tested, β represents the order of the spatial truncated fractional derivative, 1<β<2, the value of β is negatively correlated with the sediment concentration along the way, the closer the value of β is to 1, the more obvious the superdiffusion phenomenon of phosphorus in the river to be tested, D represents the superdiffusion coefficient, d represents the desorption coefficient of phosphorus for the river to be tested, and v represents the average flow velocity of the river to be tested.

[0090] It should be noted that the time-truncated fractional derivative of the Caputo type at the initial moment is is defined as follows:

[0091]

[0092] Among them, the Riemann-Liouville type spatial truncated fractional derivative at the upper boundary of the river to be measured is is defined as follows:

[0093]

[0094] Among them, Γ(α) is a single-parameter Gamma function, which is defined as follows:

[0095]

[0096] Furthermore, in one embodiment, the current detection time and the spatial position of the target detection point can be input into the simulation model of the phosphorus migration process of the river to be tested; based on the simulation model of the phosphorus migration process of the river to be tested, the phosphorus migration process of the target detection point in the river to be tested is simulated according to the current detection time and the spatial position of the target detection point to obtain the phosphorus migration detection result of the target detection point in the river to be tested.

[0097] Specifically, after inputting the spatial position and current detection time of any detection point into the simulation model of the phosphorus migration process, the model can be solved based on the finite difference method to obtain the phosphorus concentration of the detection point in the river to be tested at the current detection time. By inputting the spatial positions and current detection times of several detection points in turn, the spatiotemporal distribution results of phosphorus in the river to be tested can be obtained.

[0098] The method for detecting phosphorus migration in a river provided in an embodiment of the present application is by obtaining water body property information of the river to be tested and experimental data of phosphorus tracer in the water body; determining the desorption coefficient of phosphorus in the river to be tested according to the water body property information of the river to be tested; constructing a simulation model of the phosphorus migration process of the river to be tested according to the experimental data of phosphorus tracer in the water body and the desorption coefficient of phosphorus in the river to be tested; simulating the phosphorus migration process of the river to be tested based on the simulation model of the phosphorus migration process of the river to be tested to obtain the detection result of phosphorus migration in the river to be tested; wherein the phosphorus migration detection result at least includes the spatiotemporal distribution result of phosphorus. The method provided in the above scheme constructs a simulation model of the phosphorus migration process of the river to be tested according to the experimental data of phosphorus tracer in the water body of the river to be tested and the desorption coefficient of phosphorus in the river to be tested, so that the model can accurately describe the migration and transformation process of phosphorus in the river to be tested, thereby improving the accuracy of the final phosphorus migration detection result in the river. In addition, the simulation model of the phosphorus migration process adopts a spatiotemporal fractional-order convection-diffusion model with a desorption term. The model expression is simple, has few parameters and is easy to implement. It can simultaneously describe the superdiffusion phenomenon of phosphorus in water bodies under the adsorption of suspended sediment and the adsorption and desorption process of phosphorus by riverbed mud, thereby accurately describing the spatiotemporal distribution of phosphorus in water bodies.

[0099] An embodiment of the present application provides a device for detecting the migration of phosphorus in a river, which is used to execute the method for detecting the migration of phosphorus in a river provided in the above embodiment.

[0100] like Figure 3 , which is a schematic diagram of the structure of a device for detecting phosphorus migration in a river provided by an embodiment of the present application. The device 30 for detecting phosphorus migration in a river comprises: an acquisition module 301 , a determination module 302 , a model building module 303 and a detection module 304 .

[0101] Among them, the acquisition module is used to obtain the water body property information of the river to be tested and the experimental data of the water phosphorus tracer; the determination module is used to determine the desorption coefficient of the river to be tested for the phosphorus element according to the water body property information of the river to be tested; the model construction module is used to construct a simulation model of the phosphorus migration process of the river to be tested according to the experimental data of the water phosphorus tracer and the desorption coefficient of the river to be tested for the phosphorus element; the detection module is used to simulate the phosphorus migration process of the river to be tested based on the simulation model of the phosphorus migration process of the river to be tested, so as to obtain the detection result of phosphorus migration in the river to be tested; wherein the phosphorus migration detection result at least includes the spatiotemporal distribution result of phosphorus.

[0102] Specifically, in one embodiment, the model building module is specifically used to:

[0103] According to the experimental data of phosphorus tracer in water, the time cutoff fractional derivative order, space cutoff fractional derivative order, cutoff coefficient and super diffusion coefficient of the river to be tested are inverted;

[0104] According to the desorption coefficient of phosphorus in the tested river, the order of time-cutoff fractional derivative, the order of space-cutoff fractional derivative, the truncation coefficient and the superdiffusion coefficient, a simulation model of phosphorus migration process in the tested river is constructed;

[0105] Among them, the order of the time-truncated fractional derivative represents the retention characteristics of phosphorus in the river to be tested under the influence of sediment sedimentation and section obstruction, the order of the spatial-truncated fractional derivative represents the super-diffusion characteristics of phosphorus in the river to be tested along the direction of water flow due to the adsorption of suspended sediment, and the truncation coefficient represents the riverbed scouring and silting state of the river to be tested.

[0106] Specifically, in one embodiment, the model building module is specifically used to:

[0107] Based on the following expression, a simulation model of phosphorus migration process in the river to be tested is constructed:

[0108]

[0109] Among them, u represents the phosphorus concentration of the river to be tested, t represents the current detection time, and x represents the spatial position of the detection point of the river to be tested. represents the time-truncated fractional derivative of the Caputo type at the initial time, α represents the order of the time-truncated fractional derivative, λ represents the truncation coefficient, represents the Riemann-Liouville type spatial truncated fractional derivative at the upper boundary of the river to be tested, β represents the order of the spatial truncated fractional derivative, D represents the superdiffusion coefficient, d represents the desorption coefficient of phosphorus by the river to be tested, and v represents the average flow velocity of the river to be tested.

[0110] Specifically, in one embodiment, the detection module is specifically used to:

[0111] Input the current detection time and the spatial position of the target detection point into the simulation model of phosphorus migration process of the river to be tested;

[0112] Based on the simulation model of the phosphorus migration process of the river to be tested, the phosphorus migration process of the target detection point in the river to be tested is simulated according to the current detection time and the spatial position of the target detection point to obtain the phosphorus migration detection result of the target detection point in the river to be tested.

[0113] Specifically, in one embodiment, the determination module is specifically used to:

[0114] According to the water attribute information of the river to be tested, an indoor water tank experiment is carried out on the river to be tested to obtain indoor water tank experiment data;

[0115] By analyzing the indoor water tank experimental data, the desorption coefficient of phosphorus in the tested river was obtained.

[0116] Specifically, in one embodiment, the water attribute information includes at least the pH value of the water body, the water body temperature, the sediment concentration, the sediment particle properties and the porosity of the riverbed sediment of the river to be tested.

[0117] Specifically, in one embodiment, the detection module is further used to:

[0118] The eutrophication level of the water body of the river to be tested is determined based on the detection results of phosphorus migration in the river to be tested.

[0119] Regarding the device for detecting the migration of phosphorus in rivers in this embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method and will not be elaborated here.

[0120] The device for detecting the migration of phosphorus in a river provided in an embodiment of the present application is used to execute the method for detecting the migration of phosphorus in a river provided in the above-mentioned embodiment. Its implementation method and principle are the same and will not be repeated here.

[0121] An embodiment of the present application provides an electronic device for executing the method for detecting phosphorus migration in a river provided in the above embodiment.

[0122] like Figure 4 FIG. 4 is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. The electronic device 40 includes: at least one processor 41 and a memory 42.

[0123] The memory stores computer-executable instructions; at least one processor executes the computer-executable instructions stored in the memory, so that the at least one processor executes the method for detecting the migration of phosphorus in rivers provided in the above embodiment.

[0124] An electronic device provided in an embodiment of the present application is used to execute the method for detecting the migration of phosphorus in a river provided in the above embodiment. Its implementation method and principle are the same and will not be repeated here.

[0125] An embodiment of the present application provides a computer-readable storage medium, in which computer-executable instructions are stored. When a processor executes the computer-executable instructions, the method for detecting the migration of phosphorus in a river provided in any of the above embodiments is implemented.

[0126] The storage medium containing computer executable instructions of the embodiment of the present application can be used to store computer executable instructions of the method for detecting the migration of phosphorus in rivers provided in the aforementioned embodiments. The implementation method and principle are the same and will not be repeated here.

[0127] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0128] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0129] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0130] The above-mentioned integrated unit implemented in the form of a software functional unit can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to perform some steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk and other media that can store program code.

[0131] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example for illustration. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. The specific working process of the device described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0132] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for detecting phosphorus migration in a river, characterized in that: include: Obtain water property information of the river to be tested and experimental data of phosphorus tracer in water; Determining the desorption coefficient of phosphorus of the river to be tested according to the water attribute information of the river to be tested; Constructing a simulation model of the phosphorus migration process of the river to be tested based on the experimental data of the phosphorus tracer in the water body and the desorption coefficient of phosphorus in the river to be tested; Based on the simulation model of the phosphorus migration process of the river to be tested, the phosphorus migration process of the river to be tested is simulated to obtain the phosphorus migration detection result in the river to be tested; wherein the phosphorus migration detection result at least includes the temporal and spatial distribution result of phosphorus; The method of constructing a simulation model of phosphorus migration process of the river to be tested based on the experimental data of the phosphorus tracer in the water body and the desorption coefficient of phosphorus of the river to be tested comprises: According to the experimental data of the phosphorus element tracer in the water body, invert the time truncated fractional derivative order, the space truncated fractional derivative order, the truncation coefficient and the super diffusion coefficient of the river to be tested; According to the desorption coefficient of phosphorus in the river to be tested, the order of time-truncated fractional derivative, the order of space-truncated fractional derivative, the truncation coefficient and the superdiffusion coefficient, a simulation model of the phosphorus migration process of the river to be tested is constructed; Among them, the order of the time-truncated fractional derivative represents the retention characteristics of the phosphorus element in the river to be tested under the influence of sediment sedimentation and cross-section obstruction, the order of the spatial-truncated fractional derivative represents the super-diffusion characteristics of the phosphorus element in the river to be tested along the water flow direction due to the adsorption of suspended sediment, and the truncation coefficient represents the riverbed scouring and silting state of the river to be tested.

2. The method according to claim 1, characterized in that The method of constructing a simulation model of phosphorus migration process of the river to be tested according to the desorption coefficient of phosphorus of the river to be tested, the order of time truncation fractional derivative, the order of space truncation fractional derivative, the truncation coefficient and the super diffusion coefficient, comprises: Based on the following expression, a simulation model of phosphorus migration process of the river to be tested is constructed: Wherein, u represents the phosphorus concentration of the river to be tested, t represents the current detection time, and x represents the spatial position of the detection point of the river to be tested. represents the time-truncated fractional derivative of the Caputo type at the initial time, α represents the order of the time-truncated fractional derivative, λ represents the truncation coefficient, represents the Riemann-Liouville type spatial truncated fractional derivative at the upper boundary position of the river to be tested, β represents the order of the spatial truncated fractional derivative, D represents the superdiffusion coefficient, d represents the desorption coefficient of phosphorus by the river to be tested, and v represents the average flow velocity of the river to be tested.

3. The method according to claim 2, characterized in that The simulation model of the phosphorus migration process of the river to be tested is used to simulate the phosphorus migration process of the river to be tested to obtain the detection result of phosphorus migration in the river to be tested, including: Inputting the current detection time and the spatial position of the target detection point into the simulation model of the phosphorus migration process of the river to be detected; Based on the simulation model of the phosphorus migration process of the river to be tested, the phosphorus migration process of the target detection point in the river to be tested is simulated according to the current detection time and the spatial position of the target detection point to obtain the phosphorus migration detection result of the target detection point in the river to be tested.

4. The method according to claim 1, characterized in that: The step of determining the desorption coefficient of phosphorus of the river to be tested according to the water attribute information of the river to be tested comprises: Conducting an indoor water tank experiment on the river to be tested according to the water attribute information of the river to be tested, and obtaining indoor water tank experiment data; The indoor water tank experimental data are analyzed to obtain the desorption coefficient of phosphorus element of the river to be tested.

5. The method according to claim 1, characterized in that The water attribute information includes at least the water pH value, water temperature, sediment concentration, sediment particle properties and riverbed sediment porosity of the river to be tested.

6. The method according to claim 1, characterized in that Also includes: The eutrophication degree of the water body of the river to be tested is determined according to the detection result of phosphorus migration in the river to be tested.

7. A device for detecting phosphorus migration in a river, characterized in that: include: An acquisition module is used to obtain water attribute information of the river to be tested and experimental data of phosphorus tracer in the water; A determination module, used to determine the desorption coefficient of phosphorus of the river to be tested according to the water attribute information of the river to be tested; A model building module, used to build a simulation model of the phosphorus migration process of the river to be tested based on the experimental data of the phosphorus tracer in the water body and the desorption coefficient of phosphorus in the river to be tested; A detection module, for simulating the phosphorus migration process of the river to be tested based on the simulation model of the phosphorus migration process of the river to be tested, so as to obtain the phosphorus migration detection result in the river to be tested; wherein the phosphorus migration detection result at least includes the spatiotemporal distribution result of phosphorus; The model building module is specifically used for: According to the experimental data of the phosphorus element tracer in the water body, invert the time truncated fractional derivative order, the space truncated fractional derivative order, the truncation coefficient and the super diffusion coefficient of the river to be tested; According to the desorption coefficient of phosphorus in the river to be tested, the order of time-truncated fractional derivative, the order of space-truncated fractional derivative, the truncation coefficient and the superdiffusion coefficient, a simulation model of the phosphorus migration process of the river to be tested is constructed; Among them, the order of the time-truncated fractional derivative represents the retention characteristics of the phosphorus element in the river to be tested under the influence of sediment sedimentation and cross-section obstruction, the order of the spatial-truncated fractional derivative represents the super-diffusion characteristics of the phosphorus element in the river to be tested along the water flow direction due to the adsorption of suspended sediment, and the truncation coefficient represents the riverbed scouring and silting state of the river to be tested.

8. An electronic device, characterized in that: include: at least one processor and memory; The memory stores computer-executable instructions; The at least one processor executes the computer-executable instructions stored in the memory, so that the at least one processor performs the method according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and when the processor executes the computer-executable instructions, the method according to any one of claims 1 to 6 is implemented.

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