Method, system, electronic device and storage medium for quickly estimating purification treatment scale of lake water quality

Abstract

The present application belongs to the field of lake water environment treatment, and specifically provides a method, system, electronic device and storage medium for quickly estimating the lake water purification treatment scale, comprising: constructing a quick estimation formula system: constructing calculation formulas of a comprehensive degradation coefficient, sewage inflow into a lake, and a non-uniformity coefficient; constructing a two-dimensional hydrodynamic water quality benchmark model for calculating outlet section water quality; solving a fitting equation of the non-uniformity coefficient; and estimating the sewage inflow into the target lake that can be purified and treated. Through the mixed correction mechanism of the two-dimensional hydrodynamic water quality model and the zero-dimensional water environment capacity formula, the non-uniformity coefficient in the zero-dimensional model is accurately calibrated, and the reliable estimation of the quick estimation of the lake water purification treatment scale is realized.

Description

Technical Field

[0001] This invention belongs to the field of lake water environment management, specifically, it relates to a method, system, electronic device and storage medium for rapidly estimating the scale of lake water purification and treatment. Background Technology

[0002] In lake water environment management projects, scientifically determining the scale of wastewater treatment plant effluent discharge into the lake is a core step. This is especially important for lakes with an average water depth of less than 10 meters and a surface area of ​​less than 5 km². 2 For small lakes, existing methods for verification mainly involve model trial and error. This involves using software tools to construct a two-dimensional hydrodynamic and water quality model and continuously adjusting the inflow rate and design scheme until the target concentration requirements are met. While this method can reflect the spatiotemporal changes in lake water quality, each adjustment scheme takes several hours or even days, resulting in low efficiency and difficulty in meeting the needs of rapid comparison and optimization in early-stage projects. Considering the difficulties in practical application, a simplified calculation scheme is desired, based on a zero-dimensional model overall compliance method to construct formulas for calculation. However, the key parameter—the non-uniformity coefficient—is quite sensitive and usually relies on empirical selection, lacking objective calibration methods, leading to poor accuracy and questionable reliability of the estimation results.

[0003] In summary, existing technologies fail to achieve a good balance between computational efficiency and result accuracy. Therefore, this invention aims to overcome these shortcomings by proposing an innovative hybrid approach: using a two-dimensional model to correct key parameters of a zero-dimensional model, ultimately forming an efficient and reliable fast estimation method. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a method, system, electronic device and storage medium for rapidly estimating the scale of lake water purification and treatment. By constructing a two-dimensional hydrodynamic water quality model and a zero-dimensional water environment capacity formula through a hybrid correction mechanism, the non-uniformity coefficient in the zero-dimensional model is accurately calibrated, thereby achieving a reliable estimate of the scale of lake water purification and treatment.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a method for rapidly estimating the scale of lake water purification and treatment, comprising the following steps: S1. Constructing a rapid estimation formula system: Constructing a comprehensive degradation coefficient Wastewater inflow into the lake and the coefficient of non-uniformity The calculation formula; S2. Construct a two-dimensional hydrodynamic water quality benchmark model to calculate the water quality at the outlet section. ; S3. Solving for the non-uniformity coefficient The fitting equation; S4. Estimate the inflow of wastewater into the target lake that can be purified.

[0006] In a preferred embodiment, step S1 includes the following steps: S11, Constructing the comprehensive degradation coefficient Calculation formula; S12, Based on comprehensive degradation coefficient The overall compliance method was used to calculate the water environment capacity of the zero-dimensional model. And calculate the amount of pollutants discharged into the water body; S13. Based on the fact that the amount of pollution discharged into the water body is equal to the water environment capacity, calculate and derive the sewage inflow rate into the lake. The calculation formula and the coefficient of non-uniformity The calculation formula.

[0007] In the preferred embodiment, in step S11, the comprehensive degradation coefficient is... The calculation formula is: (1); In the formula, The comprehensive degradation coefficient of water purification and treatment measures; Design value for surface load reduction in water purification and treatment measures; The average water depth under the design operating conditions for water purification and treatment measures.

[0008] In the preferred embodiment, the formula for calculating the water environment capacity in step S12 is: (2); In the formula, Water environmental capacity; The coefficient of uniformity; It is water from upstream; The target concentration for the lake; This represents the background concentration value of the upstream water. The comprehensive degradation coefficient of water purification and treatment measures; The water volume designed for the operational conditions of water purification and treatment measures; This refers to the flow rate of sewage entering the lake.

[0009] In a preferred embodiment, in step S13, the amount of pollution discharged into the water body The calculation formula is: (3); In the formula, The amount of pollution discharged into the water body; This refers to the amount of endogenous pollution. This refers to the flow rate of sewage into the lake. The concentration of the wastewater discharged from the wastewater treatment plant; It is water from upstream; This represents the background concentration value of the upstream water. When the amount of pollution discharged into a water body equals the water environment capacity... This represents the maximum amount of pollution that the target lake can absorb throughout the year. By simultaneously solving formulas (2) and (3), we can obtain formulas (4) and (5), thus obtaining... , : (4); (5).

[0010] In the preferred embodiment, in step S2, MIKE 21 software is used to solve the two-dimensional shallow water wave equation using the explicit finite volume method with the center of the element. The MIKE21 Transport module is used to simulate the migration and diffusion of pollutants, and the wastewater inflow rate into the lake is adjusted. and the comprehensive degradation coefficient of water purification and treatment measures Solve for the water quality at the outlet section. .

[0011] In the preferred embodiment, in step S3, the non-uniformity coefficient is calculated. The fitting equation includes the following sub-steps: S31. Design value of surface reduction load based on water purification treatment measures Constructing the range of values Sequence, combined with the comprehensive degradation coefficient of water purification treatment measures The calculation formula is obtained. sequence; S32. Preliminary judgment The range of values ​​for the sequence is used to construct the wastewater inflow rate into the lake. The sequence enables the calculation of water quality concentration at the outlet section based on a two-dimensional hydrodynamic water quality model. Target concentration for lakes 0.95 to 1.05 times; S33. Calculation of water quality at the outlet section based on a two-dimensional hydrodynamic water quality model. Sequence, let , combined The calculation formula is obtained sequence; S34, according to Sequence and Constructing the correspondence between sequences and The piecewise fitting equation.

[0012] In a preferred embodiment, step S4, estimating the inflow rate of wastewater that the target lake can purify, includes the following sub-steps: S41, based on the construction Sequence, according to Calculation formula Series, combined and The piecewise fitting equation is obtained sequence; S42, Computation-based series and Sequence, according to The calculation formula, calculation The estimated sequence is the inflow of sewage into the target lake that can be purified and treated.

[0013] In the preferred embodiment, step S5 is further included, which involves calculating... Error analysis is performed on the estimated sequence: the sequence calculated in step S4 is... The estimated sequence is used as input to the two-dimensional hydrodynamic water quality model to calculate the water quality at the outlet section. ,set up According to The calculation formula is used to obtain the inflow rate to the lake calculated based on the two-dimensional hydrodynamic water quality model. The series will The estimated sequence and the inflow calculated based on the two-dimensional hydrodynamic water quality model The series performs relative error calculations.

[0014] In the preferred embodiment, in step S5, The estimated sequence and the inflow calculated based on the two-dimensional hydrodynamic water quality model The formula for calculating the relative error of the series is as follows: (6); In the formula, This represents the relative error of the inflow rate into the lake. q The inflow to the lake is estimated based on a rapid estimation method; The inflow rate is calculated based on a two-dimensional hydrodynamic water quality model.

[0015] This invention also provides a system for rapidly estimating the scale of lake water purification and treatment, used to perform the above-described method for rapidly estimating the scale of lake water purification and treatment, comprising: It includes a formula construction module, which is used to build a rapid estimation formula system that includes calculation formulas for comprehensive degradation coefficient, zero-dimensional model water environment capacity, inflow into the lake and non-uniformity coefficient; The two-dimensional model building module is based on MIKE 21 software to build a two-dimensional hydrodynamic water quality benchmark model, calculate the tailwater discharge volume and comprehensive degradation coefficient, and output the calculated water quality value of the outlet section. The coefficient fitting module is used to construct a comprehensive degradation coefficient sequence based on the surface reduction load design value sequence, construct a tailwater discharge flow sequence, combine the two-dimensional model calculation results and the non-uniformity coefficient formula to obtain the non-uniformity coefficient sequence, and then construct a piecewise fitting equation between the surface reduction load design value and the non-uniformity coefficient in different surface reduction load design value intervals. The estimation and analysis module is used to obtain the comprehensive degradation coefficient sequence and the non-uniformity coefficient sequence based on the surface reduction load design value sequence, the comprehensive degradation coefficient calculation formula and the piecewise fitting equation, and to complete the rapid estimation of the inflow to the lake by combining the inflow calculation formula.

[0016] The present invention also provides an electronic device for rapidly estimating the scale of lake water purification treatment, including a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the steps of the above-described method for rapidly estimating the scale of lake water purification treatment.

[0017] The present invention also provides a storage medium for rapidly estimating the scale of lake water purification treatment. The storage medium is a computer-readable storage medium that stores a computer program. When the computer program is executed by a processor, it implements the steps of the above-described method for rapidly estimating the scale of lake water purification treatment.

[0018] The present invention provides a method, system, electronic device, and storage medium for rapidly estimating the scale of lake water purification and treatment, which has the following beneficial effects: 1. This invention overcomes the inefficiency of the model trial-and-error method in the prior art and solves the problem of poor accuracy of estimation results due to the reliance on experience to select non-uniform coefficients in traditional zero-dimensional models. Through a hybrid correction mechanism that uses a two-dimensional hydrodynamic water quality model to correct key parameters of a zero-dimensional model, it can quickly estimate the scale of water purification treatment for small lakes while ensuring the reliability of the estimation results. This can meet the dual requirements of computational efficiency and result accuracy for rapid comparison and optimization of schemes in the early stages of projects.

[0019] 2. Regarding the sensitive parameter of non-uniformity coefficient in the zero-dimensional model, this invention constructs a piecewise fitting equation between the surface reduction load design value and the non-uniformity coefficient, and combines the calculation results of the two-dimensional model to complete the objective calibration and quantitative solution of this parameter, replacing the traditional empirical selection method. This effectively avoids the estimation bias caused by subjective experience, making the estimation process of the scale of lake water purification treatment more scientific and objective.

[0020] 3. This invention constructs a complete and rapid estimation formula system including comprehensive degradation coefficient, water environment capacity, wastewater inflow into the lake, and non-uniformity coefficient. It also includes a complete operational method for two-dimensional model construction, coefficient fitting, and error analysis, forming a standardized and practical estimation scheme for the scale of water purification treatment in small lakes. This method is suitable for lakes with an average water depth of less than 10m and a surface area of ​​less than 5km². 2 The small lake design is tailored to practical engineering applications, with clear operating procedures and well-defined parameter calculations, making it easy for engineering technicians to apply in practice. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a flowchart of the method of the present invention; Figure 2 Example diagram showing the relationship between surface shear load design value and non-uniformity coefficient. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention.

[0023] Example 1: A method for rapidly estimating the scale of lake water purification and treatment, such as Figure 1 This includes the following steps: S1. Constructing a rapid estimation formula system: Constructing a comprehensive degradation coefficient Wastewater inflow into the lake and the coefficient of non-uniformity The calculation formula.

[0024] Includes the following steps: S11, Constructing the comprehensive degradation coefficient Calculation formula.

[0025] Based on the surface reduction load design value of water purification measures and the average water depth during design and operation Calculate its overall degradation coefficient.

[0026] The calculation formula is: (1); In the formula, The comprehensive degradation coefficient of water purification and treatment measures. ; The surface load reduction design value for water purification and treatment measures. ; The average water depth under the design operating conditions for water purification and treatment measures. .

[0027] S12, Based on comprehensive degradation coefficient The overall compliance method was used to calculate the water environment capacity of the zero-dimensional model. And calculate the amount of pollutants discharged into the water body.

[0028] For small lakes where pollutants are uniformly mixed, the overall compliance method in the formula method can be used to estimate the water environmental capacity.

[0029] The formula for calculating water environmental capacity is: (2); In the formula, For water environment capacity, ; The coefficient of uniformity; Water from upstream ; The target concentration for this water body. ; This represents the background concentration value of the upstream water. ; The comprehensive degradation coefficient of water purification and treatment measures. ; The water volume designed for the operational conditions of water purification and treatment measures. ; The inflow rate of effluent from the wastewater treatment plant. .

[0030] Considering internal pollution sources, upstream water inflow, and wastewater treatment plant effluent discharge, the amount of pollution discharged into the water body The calculation formula is: (3); In the formula, The amount of pollution discharged into the water body, ; Endogenous pollution level ; The inflow rate of effluent from the wastewater treatment plant. ; The concentration of the effluent from the wastewater treatment plant is introduced. ; Water from upstream ; This represents the background concentration value of the upstream water. .

[0031] S13. Based on the fact that the amount of pollution discharged into the water body is equal to the water environment capacity, calculate and derive the sewage inflow rate into the lake. The calculation formula and the coefficient of non-uniformity The calculation formula.

[0032] When the amount of pollution discharged into a water body equals the water environment capacity... This represents the maximum amount of pollution that the target lake can absorb throughout the year. By simultaneously solving formulas (2) and (3), we can obtain formulas (4) and (5), thus obtaining... , : (4); (5).

[0033] S2. Construct a two-dimensional hydrodynamic water quality benchmark model to calculate the water quality at the outlet section. .

[0034] Using MIKE 21 software, based on the two-dimensional shallow water wave equations, and employing the explicit finite volume method with element centers, the migration and diffusion of pollutants were simulated using the MIKE 21 Transport module. The wastewater inflow rate into the lake was calculated. and the comprehensive degradation coefficient of water purification and treatment measures Solve for the water quality at the outlet section. This ensures that the water quality at the outlet section is close to the target water quality.

[0035] The specific steps are as follows: (1) Input data and boundary conditions Topographic conditions: The topographic file was obtained by spatial linear interpolation using measured lake bottom topographic scatter data, and an unstructured triangular mesh was constructed.

[0036] Boundary conditions: There is no natural water inflow upstream; under the design conditions, the wastewater treatment plant's effluent is discharged into... m 3 / s, concentration mg / l; downstream is the normal water level of 18 m, 0.2 mg / l.

[0037] Pollution source: The amount of endogenous pollution is t / a.

[0038] (2) Main parameters The overall degradation coefficient is 1 / d.

[0039] (3) Data to be adjusted Wastewater treatment plant effluent discharge m 3 / s, with a comprehensive degradation coefficient of . 1 / d.

[0040] (4) Calculation results The water quality at the outlet section is mg / l.

[0041] S3. Solve for the non-uniformity coefficients related to lake characteristics and water treatment processes. The fitting equation.

[0042] Includes the following sub-steps: S31. Design value of surface reduction load based on water purification treatment measures Constructing the range of values Sequence, combined with the comprehensive degradation coefficient of water purification treatment measures The calculation formula is obtained. sequence.

[0043] S32. Preliminary judgment The range of values ​​for the sequence is used to construct the wastewater inflow rate into the lake. The sequence enables the calculation of water quality concentration at the outlet section based on a two-dimensional hydrodynamic water quality model. Target concentration for lakes 0.95 to 1.05 times; S33. Calculation of water quality at the outlet section based on a two-dimensional hydrodynamic water quality model. Sequence, let , combined The calculation formula is obtained sequence.

[0044] S34, according to Sequence and Constructing the correspondence between sequences and The piecewise fitting equation.

[0045] The following explanation of this step will be based on specific data: (1) According to Build sequence Based on experience in design processes, the design value of surface reduction load for water purification treatment measures. The value range is 0 to 100. .Will As a variable, the sequence takes values ​​of 10, 20, 30, 40, 50, 60, 70, 80, 90, and 100. Using formula (1), we can obtain The sequence is 0.007, 0.015, 0.022, 0.029, 0.037, 0.044, 0.052, 0.059, 0.066, 0.074 1 / d.

[0046] (2) Construction sequence Preliminary assessment The range of values ​​that a sequence can take is... The sequence is 0.2, 0.6, 1, 1.1, 1.5, 2, 2.5, 2.8, 3, 3.5m 3 / s, making the group The water quality concentrations at the outlet sections under the sequence are similar.

[0047] (3) Construction sequence Calculation of water quality at the outlet section based on a two-dimensional hydrodynamic water quality model Sequence, let Using formula (5), we can obtain The sequence is shown in Table 1. After calculation, The value range is 1.050 to 1.093. Due to the small lake design scheme shown in the calculation case, the hydraulic residence time under natural conditions is fully extended by topographic shaping, which prolongs the time for water flow to mix fully. The zero-dimensional model changes water multiple times a year, and the two-dimensional model itself also has calculation errors. Therefore, the non-uniformity coefficient obtained by combining formulas (2) and (3) is... This not only expresses the uniformity of water mixing, but also includes the performance of year-round water exchange regulation and the errors of the two-dimensional model itself, leading to... The value of is different from the usual empirical value of 0.6 to 1, and even exceeds 1. This study is an exploration and attempt in a special environment. The proposed method can provide a solution for similar cases and lay the working foundation for quickly estimating the value of sensitive parameters in the calculation case.

[0048]

[0049] (4) Surface shear load design value Δ and non-uniformity coefficient It presents a multi-segment broken line relationship, such as Figure 2 As shown. Construct a small lake Δ and The piecewise fitting equation is as follows: ; ; ; ; ; ; ; ; .

[0050] S4. Estimate the inflow of wastewater into the target lake that can be purified.

[0051] Includes the following sub-steps: S41, based on the construction Sequence, according to Calculation formula Series, combined and The piecewise fitting equation is obtained sequence; S42, Computation-based series and Sequence, according to The calculation formula, calculation The estimated sequence is the inflow of sewage into the target lake that can be purified and treated.

[0052] S5, Calculation Error analysis is performed on the estimated sequence: the sequence calculated in step S4 is... The estimated sequence is used as input to the two-dimensional hydrodynamic water quality model to calculate the water quality at the outlet section. ,set up According to The calculation formula is used to obtain the inflow rate to the lake calculated based on the two-dimensional hydrodynamic water quality model. The series will The estimated sequence and the inflow calculated based on the two-dimensional hydrodynamic water quality model The series performs relative error calculations.

[0053] The estimated sequence and the inflow calculated based on the two-dimensional hydrodynamic water quality model The formula for calculating the relative error of the series is as follows: (6); In the formula, The relative error of the inflow to the lake is %; The inflow to the lake is estimated based on a fast estimation method. ; The inflow rate is calculated based on a two-dimensional hydrodynamic and water quality model. .

[0054] In this embodiment, the surface reduction load design value for constructing water purification treatment measures is... The sequence, with values ​​15, 25, 35, 45, 55, 65, 75, 85, 95. , serving as a data column for rapid estimation and error analysis.

[0055] Calculated according to formula (1) The sequence, based on Δ and Calculation of the fitting equation The sequence. Using formula (4), a preliminary judgment is made. The range of values ​​that a sequence can take is... The sequences are 0.4, 0.7, 1.05, 1.4, 1.9, 2.4, 2.7, 2.9, 3.4m. 3 / s.

[0056] The water quality at the outlet section was calculated based on a two-dimensional hydrodynamic water quality model. .set up The final estimated inflow to the lake is obtained according to formula (4). As shown in Table 2.

[0057] The relative error of the inflow to the lake is calculated according to formula (6). Based on data from application examples, the absolute values ​​of the relative errors in the sequences are all less than 3%, demonstrating the high accuracy of the rapid estimation method. In practical engineering scale assessments, when timelines are tight (e.g., requiring a judgment within one day) and detailed assessments using two-dimensional models are not feasible, the rapid estimation method proposed in this invention can be employed. Considering a certain margin for water environment capacity, a non-uniformity coefficient is recommended. The initial value is determined by taking the upper limit of 1 as the standard value. A quick and preliminary method is used for rough preliminary calculation. After the conditions for in-depth work are met, a two-dimensional model is used for detailed demonstration.

[0058]

[0059] Example 2: This embodiment provides a system for rapidly estimating the scale of lake water purification and treatment, used to execute the method for rapidly estimating the scale of lake water purification and treatment described in Embodiment 1, including: It includes a formula construction module, which is used to build a rapid estimation formula system that includes calculation formulas for comprehensive degradation coefficient, zero-dimensional model water environment capacity, inflow into the lake and non-uniformity coefficient; The two-dimensional model building module is based on MIKE 21 software to build a two-dimensional hydrodynamic water quality benchmark model, calculate the tailwater discharge volume and comprehensive degradation coefficient, and output the calculated water quality value of the outlet section. The coefficient fitting module is used to construct a comprehensive degradation coefficient sequence based on the surface reduction load design value sequence, construct a tailwater discharge flow sequence, combine the two-dimensional model calculation results and the non-uniformity coefficient formula to obtain the non-uniformity coefficient sequence, and then construct a piecewise fitting equation between the surface reduction load design value and the non-uniformity coefficient in different surface reduction load design value intervals. The estimation and analysis module is used to obtain the comprehensive degradation coefficient sequence and the non-uniformity coefficient sequence based on the surface reduction load design value sequence, the comprehensive degradation coefficient calculation formula and the piecewise fitting equation, and to complete the rapid estimation of the inflow to the lake by combining the inflow calculation formula.

[0060] Example 3: This embodiment provides an electronic device for rapidly estimating the scale of lake water purification treatment, including a memory and a processor. The memory stores a computer program, and when the processor executes the computer program, it implements the steps of the method for rapidly estimating the scale of lake water purification treatment in Embodiment 1.

[0061] This embodiment also provides a storage medium for rapidly estimating the scale of lake water purification treatment. The storage medium is a computer-readable storage medium that stores a computer program. When the computer program is executed by a processor, it implements the steps of the method for rapidly estimating the scale of lake water purification treatment as described in Embodiment 1.

[0062] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for quickly estimating the scale of water purification treatment of a lake, characterized by, Includes the following steps: S1, Constructing a quick estimation formula system: constructing the calculation formula of the comprehensive degradation coefficient , the sewage inflow into the lake , and the uneven coefficient ​ S2, construct a two-dimensional water power water quality benchmark model for calculating the outlet section water quality ; S3, solving the non-uniformity coefficient of the fitting equation; S4. Estimate the inflow of wastewater into the target lake that can be purified.

2. The method for quickly estimating the purification treatment scale of a lake water quality according to claim 1, characterized in that, Step S1 includes the following steps: S11, Constructing the comprehensive degradation coefficient Calculation formula; S12, Based on comprehensive degradation coefficient The overall compliance method was used to calculate the water environment capacity of the zero-dimensional model. And calculate the amount of pollutants discharged into the water body; S13, according to the pollution amount of the water body, the water environment capacity, the sewage into the lake flow is calculated and derived The calculation formula of the non-uniform coefficient The calculation formula.

3. The method for rapidly estimating the scale of lake water purification and treatment according to claim 2, characterized in that, In the step S11, the degradation coefficient is calculated by integrating the degradation coefficient The calculation formula is as follows: （1）； In the formula, is the comprehensive degradation coefficient of water purification treatment measures; is the surface reduction load design value of water purification treatment measures; is the average water depth under the design operation condition of water purification treatment measures.

4. The method for rapidly estimating the scale of lake water purification and treatment according to claim 3, characterized in that, In step S12, the formula for calculating the water environment capacity is: （2）； In the formula, Water environmental capacity; The coefficient of uniformity; It is water from upstream; The target concentration for the lake; This represents the background concentration value of the upstream water. The comprehensive degradation coefficient of water purification and treatment measures; The water volume designed for the operational conditions of water purification and treatment measures; This refers to the flow rate of sewage entering the lake.

5. The method for rapidly estimating the scale of lake water purification and treatment according to claim 4, characterized in that, In step S13, the amount of pollution discharged into the water body The calculation formula is: （3）； In the formula, The amount of pollution discharged into the water body; This refers to the amount of endogenous pollution. This refers to the flow rate of sewage into the lake. The concentration of the wastewater discharged from the wastewater treatment plant; It is water from upstream; This represents the background concentration value of the upstream water. When the amount of pollution discharged into a water body equals the water environment capacity... This represents the maximum amount of pollution that the target lake can absorb throughout the year. By simultaneously solving formulas (2) and (3), we can obtain formulas (4) and (5), thus obtaining... , : （4）； （5）。 6. The method for rapidly estimating the scale of lake water purification and treatment according to claim 1, characterized in that, In step S2, MIKE 21 software is used to solve the two-dimensional shallow water wave equation using the explicit finite volume method with the center of the element. The migration and diffusion of pollutants are simulated using the MIKE 21 Transport module, and the wastewater inflow rate into the lake is adjusted. and the comprehensive degradation coefficient of water purification and treatment measures Solve for the water quality at the outlet section. .

7. The method for rapidly estimating the scale of lake water purification and treatment according to claim 5, characterized in that, In step S3, the non-uniformity coefficient is solved. The fitting equation includes the following sub-steps: S31. Design value of surface reduction load based on water purification treatment measures Constructing the range of values Sequence, combined with the comprehensive degradation coefficient of water purification treatment measures The calculation formula is obtained. sequence; S32. Preliminary judgment The range of values ​​for the sequence is used to construct the wastewater inflow rate into the lake. The sequence enables the calculation of water quality concentration at the outlet section based on a two-dimensional hydrodynamic water quality model. Target concentration for lakes 0.95 to 1.05 times; S33. Calculation of water quality concentration at the outlet section based on a two-dimensional hydrodynamic water quality model. Sequence, let , combined The calculation formula is obtained sequence; S34, according to Sequence and Constructing the correspondence between sequences and The piecewise fitting equation.

8. The method for rapidly estimating the scale of lake water purification and treatment according to claim 1, characterized in that, Step S4, estimating the inflow of wastewater that the target lake can purify, includes the following sub-steps: S41, based on the construction Sequence, according to Calculation formula Series, combined and The piecewise fitting equation is obtained sequence; S42, Computation-based series and Sequence, according to The calculation formula, calculation The estimated sequence is the inflow of sewage into the target lake that can be purified and treated.

9. The method for rapidly estimating the scale of lake water purification and treatment according to claim 8, characterized in that, It also includes step S5, which calculates... Error analysis is performed on the estimated sequence: the sequence calculated in step S4 is... The estimated sequence is used as input to the two-dimensional hydrodynamic water quality model to calculate the water quality at the outlet section. ,set up According to The calculation formula is used to obtain the inflow rate to the lake calculated based on the two-dimensional hydrodynamic water quality model. The series will The estimated sequence and the inflow calculated based on the two-dimensional hydrodynamic water quality model The series performs relative error calculations.

10. The method for rapidly estimating the scale of lake water purification and treatment according to claim 9, characterized in that, In step S5 The estimated sequence and the inflow calculated based on the two-dimensional hydrodynamic water quality model The formula for calculating the relative error of the series is as follows: （6）； In the formula, This represents the relative error of the inflow rate into the lake. q The inflow to the lake is estimated based on a rapid estimation method; The inflow rate is calculated based on a two-dimensional hydrodynamic water quality model.

11. A system for rapidly estimating the scale of lake water purification and treatment, characterized in that, A method for rapidly estimating the scale of lake water purification treatment as described in any one of claims 1 to 10, comprising: It includes a formula construction module, which is used to build a rapid estimation formula system that includes calculation formulas for comprehensive degradation coefficient, zero-dimensional model water environment capacity, inflow into the lake and non-uniformity coefficient; The two-dimensional model building module is based on MIKE 21 software to build a two-dimensional hydrodynamic water quality benchmark model, calculate the tailwater discharge volume and comprehensive degradation coefficient, and output the calculated water quality value of the outlet section. The coefficient fitting module is used to construct a comprehensive degradation coefficient sequence based on the surface reduction load design value sequence, construct a tailwater discharge flow sequence, combine the two-dimensional model calculation results and the non-uniformity coefficient formula to obtain the non-uniformity coefficient sequence, and then construct a piecewise fitting equation between the surface reduction load design value and the non-uniformity coefficient in different surface reduction load design value intervals. The estimation and analysis module is used to obtain the comprehensive degradation coefficient sequence and the non-uniformity coefficient sequence based on the surface reduction load design value sequence, the comprehensive degradation coefficient calculation formula and the piecewise fitting equation, and to complete the rapid estimation of the inflow to the lake by combining the inflow calculation formula.

12. An electronic device for rapidly estimating the scale of lake water purification treatment, characterized in that, It includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the steps of the method for rapidly estimating the scale of lake water purification treatment as described in any one of claims 1-10.

13. A storage medium for rapidly estimating the scale of lake water purification treatment, characterized in that, The storage medium is a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, it implements the steps of the method for rapidly estimating the scale of lake water purification treatment as described in any one of claims 1-10.

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