Device and method for detecting water transparency using turbidity and phosphate sensors

Abstract

This invention provides a device and method for detecting water transparency using turbidity and phosphate sensors. The device includes a housing, a turbidity sensor, a phosphate sensor, a data transmission line, a photoelectric conversion and data processing module, and a transparency value display and storage module. The turbidity sensor, phosphate sensor, and transparency value display and storage module are mounted on the housing, while the photoelectric conversion and data processing module is located inside the housing. The turbidity sensor and phosphate sensor are connected to the photoelectric conversion and data processing module via the data transmission line, and the photoelectric conversion and data processing module is connected to the transparency value display and storage module via the data transmission line. This invention enables real-time monitoring of water transparency values. The device is simple, has high detection efficiency, and is suitable for large-scale monitoring and long-term fixed-point monitoring of water transparency in watersheds to understand the spatiotemporal changes in water transparency values ​​within a watershed.

Description

Technical Field

[0001] This invention relates to the field of water environment monitoring equipment technology, and in particular to a device and method for detecting water transparency using turbidity and phosphate sensors. Background Technology

[0002] Water transparency is a comprehensive indicator that reflects the physical, chemical, and biological processes of water bodies and measures water quality. It is also one of the limiting factors for the growth and distribution of submerged plant communities and is often used as a key indicator to judge whether aquatic vegetation can be restored and to measure the effectiveness of ecological restoration. At the same time, water transparency also affects the visual appeal of water bodies. Therefore, improving water transparency is an important task in water body ecological restoration projects.

[0003] Currently, the traditional Seiwert's disk method is widely used to measure water transparency. A Seiwert's disk is a circular iron disk with alternating black and white stripes. During measurement, a scale is inserted through the center hole of the disk. First, the disk is placed tangent to the water surface, and the scale reading is recorded. Then, the disk is immersed in the water until the black and white stripes are just no longer visible. The scale reading is recorded again at this point. The difference between the two readings is the water transparency. However, this method has the following problems in practical application: First, it is greatly affected by wind and waves, causing the Seiwert's disk to not be lowered vertically below the water surface, but rather at an angle, resulting in low accuracy. Second, the determination of "just no longer visible black and white stripes" is difficult to ascertain; different personnel have different standards for determining this boundary, leading to a high degree of subjectivity in the test results.

[0004] Literature review and practical monitoring revealed that water transparency is significantly affected by suspended solids and phytoplankton. Turbidity is used to characterize suspended solids in water, while phosphate concentration is a limiting factor for phytoplankton growth. Multiple studies have shown that phosphate can also be correlated with water transparency, although this correlation can be unstable depending on the water type. However, it can still serve as a secondary criterion for calculating water transparency, and can be combined with other water quality indicators to establish a better fitting model. Therefore, to address the issues of low accuracy and high technical requirements of Seidon disk measurements, there is an urgent need to design a device and method for detecting water transparency using turbidity and phosphate sensors. Summary of the Invention

[0005] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a device and method for detecting water transparency using turbidity and phosphate sensors, in order to solve the problems of high operator skill requirements and low accuracy of measurement results in the prior art using Seymour disks.

[0006] To achieve the above and other related objectives, this invention provides a device for detecting water transparency using turbidity and phosphate sensors. The device includes a housing, a turbidity sensor, a phosphate sensor, a data transmission line, a photoelectric conversion and data processing module, and a transparency value display and storage module. The turbidity sensor, phosphate sensor, and transparency value display and storage module are disposed on the housing, while the photoelectric conversion and data processing module is disposed inside the housing. The turbidity sensor and phosphate sensor are connected to the photoelectric conversion and data processing module via the data transmission line, and the photoelectric conversion and data processing module is connected to the transparency value display and storage module via the data transmission line. The turbidity sensor is used to detect the turbidity of the water, and the phosphate sensor is used to detect the phosphate concentration in the water.

[0007] Preferably, the outer shell is a hollow cylindrical component, the turbidity sensor and phosphate sensor are disposed on the bottom surface of the outer shell, the photoelectric conversion and data processing module is disposed inside the outer shell, and the transparency value display and storage module is disposed on the top surface of the outer shell for displaying the water transparency value for easy reading.

[0008] Preferably, the photoelectric conversion and data processing module is used to receive water turbidity parameters and phosphate concentration parameters detected by the turbidity sensor and phosphate sensor, and to perform data calculation and processing on the water turbidity parameters and phosphate concentration parameters to obtain water transparency; the photoelectric conversion and data processing module transmits the processed data to the transparency value display and storage module, and the transparency value display and storage module displays and stores the data.

[0009] To achieve the above or other objectives, the present invention also discloses a method for detecting water transparency using turbidity and phosphate sensors, employing the aforementioned apparatus for detecting water transparency using turbidity and phosphate sensors, with the following steps:

[0010] S1: Collect water quality data for the application watershed;

[0011] In the watershed where the device uses turbidity and phosphate sensors to detect water transparency, several points with different water quality are selected, and the turbidity, phosphate concentration, and water transparency values ​​of each point are collected.

[0012] S2: Establish a model for calculating transparency values;

[0013] Substitute the water turbidity and water transparency values ​​measured in step S1 into the calculation model formula SD=a1·TUB a2 The parameters a1 and a2 were obtained by fitting the data; the phosphate concentration and water transparency values ​​measured in step S1 were substituted into the calculation model formula SD = b1·PO4. - We perform a fit using +b2 and obtain the goodness-of-fit value R of the formula.b 2 Substitute the water turbidity, phosphate concentration, and water transparency values ​​measured in step S1 into the calculation model formula SD = c1·TUB c2 +c3·PO4 - +c4 is used for fitting to obtain the values ​​of parameters c1-c4; (SD represents water transparency; TUB represents water turbidity; PO4) - (Indicates phosphate concentration)

[0014] S3: Inputting the transparency value calculation model and setting the program;

[0015] The transparency value calculation model established in step S2 is entered into the photoelectric conversion and data processing module; the program settings are as follows:

[0016] To determine whether the correlation between water transparency and phosphate concentration is stable, i.e., to determine the formula SD = b1·PO4 - The goodness-of-fit value R in +b2 b 2 Is it greater than or equal to 0.65?

[0017] If R b 2 If the value is ≥0.65, then the calculation formula is SD=c1·TUB c2 +c3·PO4 - +c4 calculates the water transparency value;

[0018] If R b 2 If <0.65, then the calculation formula is SD=a1·TUB a2 Calculate the water transparency value;

[0019] S4: Conduct large-scale water quality monitoring in the river basin;

[0020] The device for detecting water transparency using turbidity and phosphate sensors, which is part of the transparency value calculation model entered in step S3, is immersed in the water. The turbidity sensor detects the turbidity of the water, and the phosphate sensor detects the phosphate concentration in the water. The device calculates the water transparency value according to the program set in step S3. The photoelectric conversion and data processing module transmits the calculated water transparency value to the transparency value display and storage module for display and storage.

[0021] Preferably, in step S1, the turbidity and phosphate concentration of the water are detected by a turbidity sensor and a phosphate sensor, and the water transparency value at each point in step S1 is determined by the Seymour disk method; the number of points with different water quality differences in step S1 is 30-60.

[0022] Preferably, in step S2, the calculation model formula is SD=a1·TUB a2 The parameter ranges are as follows: 250≤a1≤350, -0.63≤a2≤-0.53.

[0023] Preferably, in step S3, the calculation model formula is SD = c1·TUB. c2 +c3·PO4 - The parameter range in +c4 is as follows: -6.255×10 5 ≤c1≤6.135×10 5 -0.3264≤c2≤0.3296, 34≤c3≤47, -6.134×10 5 ≤c4≤6.256×10 5 .

[0024] Preferably, in step S4, the turbidity sensor and phosphate sensor are immersed in the water. The device for detecting water transparency using the turbidity and phosphate sensors can be handheld and fixed; or fixed to the hull, with the installation position located 10-20cm below the water surface of the hull, ensuring that the turbidity sensor and phosphate sensor are fully immersed below the water surface; or the device for detecting water transparency using the turbidity and phosphate sensors can be fixed at a certain point in the water to detect the change in water transparency at that point over time.

[0025] Preferably, this method can be applied to the transparency detection of rivers, lakes, reservoirs, and various inland water bodies.

[0026] As described above, the apparatus and method for detecting water transparency using turbidity and phosphate sensors, as disclosed in this invention, have the following beneficial effects:

[0027] This invention relates to an apparatus and method for detecting water transparency using turbidity and phosphate sensors. The apparatus includes a turbidity sensor and a phosphate sensor, which directly measure the turbidity and phosphate concentration in the water. A data calculation model is established based on the correlation between these two sensors and the water transparency value, thereby enabling rapid determination of water transparency. This invention solves the problem of the traditional Sebschler disk method being susceptible to the influence of human and environmental factors on the detection results when measuring water transparency. Furthermore, this invention enables real-time monitoring of water transparency, has a simple device, high detection efficiency, and is suitable for large-scale monitoring of water transparency in watersheds as well as long-term fixed-point monitoring to understand the spatiotemporal changes in water transparency within a watershed. Attached Figure Description

[0028] Figure 1 This is a front view of the device for detecting water transparency using turbidity and phosphate sensors according to the present invention.

[0029] Figure 2 This is a top view of the device for detecting water transparency using turbidity and phosphate sensors according to the present invention;

[0030] Figure 3 This is a schematic diagram of the installation of the device for detecting water transparency using turbidity and phosphate sensors according to the present invention;

[0031] Figure 4 This is a schematic flowchart of the method for detecting water transparency using turbidity and phosphate sensors according to the present invention.

[0032] Figure 5 This is a fitting curve diagram between turbidity and water transparency values ​​in one embodiment of the present invention;

[0033] Figure 6 This is a fitted curve diagram showing the relationship between phosphate concentration and water transparency in one embodiment of the present invention;

[0034] Figure 7 This is a fitting curve diagram showing the relationship between turbidity, phosphate concentration, and water transparency values ​​in one embodiment of the present invention.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Outer shell; 2. Turbidity sensor; 3. Phosphate sensor; 4. Data transmission line; 5. Photoelectric conversion and data processing module; 6. Transparency value display and storage module; 7. Water surface; 8. Hull. Detailed Implementation

[0037] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0038] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of the invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0039] like Figures 1-3As shown, this invention provides a device for detecting water transparency using turbidity and phosphate sensors (hereinafter referred to as the detection device), comprising a housing 1, a turbidity sensor 2, a phosphate sensor 3, a data transmission line 4, a photoelectric conversion and data processing module 5, and a transparency value display and storage module 6. The turbidity sensor 2, the phosphate sensor 3, and the transparency value display and storage module 6 are disposed on the housing 1, and the photoelectric conversion and data processing module 5 is disposed inside the housing 1. The turbidity sensor 2 and the phosphate sensor 3 are connected to the photoelectric conversion and data processing module 5 via the data transmission line 4, and the photoelectric conversion and data processing module 5 is connected to the transparency value display and storage module 6 via the data transmission line 4. The turbidity sensor 2 is used to detect the turbidity of the water, and the phosphate sensor 3 is used to detect the phosphate concentration in the water.

[0040] The present invention relates to a device for detecting water transparency using turbidity and phosphate sensors. The device comprises a housing 1, a turbidity sensor 2, a phosphate sensor 3, and a photoelectric conversion and data processing module 5. The turbidity sensor 2 and the phosphate sensor 3 can detect the turbidity and phosphate concentration of the water. The photoelectric conversion and data processing module 5 stores a data calculation model relating the turbidity, phosphate concentration, and water transparency values. It can directly import the turbidity and phosphate concentration into the data calculation model in real time to automatically calculate the water transparency value. The device is simple to operate, provides objective and accurate measurement results, and solves the problem in existing technologies where water transparency measurements using the Seidon disk method are affected by various factors.

[0041] Preferred, such as Figure 1 As shown, the outer shell 1 is a hollow cylindrical part. The turbidity sensor 2 and the phosphate sensor 3 are set on the bottom surface of the outer shell 1. The photoelectric conversion and data processing module 5 is set inside the outer shell 1. The transparency value display and storage module 6 is set on the top surface of the outer shell 1 to display the water transparency value for easy reading.

[0042] Preferably, the photoelectric conversion and data processing module 5 is used to receive the water turbidity parameters and phosphate concentration parameters detected by the turbidity sensor 2 and the phosphate sensor 3, and to perform data calculation and processing on the water turbidity parameters and phosphate concentration parameters to obtain the water transparency; the photoelectric conversion and data processing module 5 transmits the processed data to the transparency value display and storage module 6, and the transparency value display and storage module 6 displays and stores the data.

[0043] To achieve the above or other objectives, the present invention also discloses a method for detecting water transparency using turbidity and phosphate sensors, employing the aforementioned apparatus for detecting water transparency using turbidity and phosphate sensors, such as... Figure 4 As shown, the steps are as follows:

[0044] A1: Collect water quality data for the application area. In the application field of using this detection device to detect water transparency, several points with significant water quality differences are selected, and the turbidity parameters, phosphate concentration parameters, and water transparency values ​​are collected at each point. In this embodiment, the water turbidity and phosphate concentration are directly detected by turbidity sensor 2 and phosphate sensor 3, respectively, and the water transparency value is detected by the Seiler disk method. Furthermore, the number of points with significant water quality differences is selected to be 30-60.

[0045] A2: Establish a model for calculating transparency values:

[0046] Substitute the water turbidity and water transparency values ​​measured in step A1 into the calculation model formula SD=a1·TUB a2 Perform fitting to obtain parameters a1 and a2; substitute the phosphate concentration and water transparency values ​​measured in step A1 into the calculation model formula SD=b1·PO4 - Perform a fit in +b2 and obtain the goodness-of-fit value R of the formula. b 2 Substitute the water turbidity, phosphate concentration, and water transparency values ​​measured in step A1 into the calculation model formula SD=c1·TUB c2 +c3·PO4 - +c4 is used for fitting to obtain the values ​​of parameters c1-c4; (SD represents water transparency; TUB represents water turbidity; PO4) - (Indicates phosphate concentration)

[0047] A3: Importing the transparency value calculation model and setting up the program;

[0048] The transparency value calculation model established in step A2 is entered into the photoelectric conversion and data processing module 5, and the program is set as follows:

[0049] First, determine whether the correlation between water transparency and phosphate concentration is stable, i.e., determine the formula SD = b1·PO4. - The goodness-of-fit value R in +b2 b 2 Is it greater than or equal to 0.65?

[0050] If R b 2 If the value is ≥0.65, then the calculation formula is SD=c1·TUB c2 +c3·PO4 - +c4 calculates the water transparency value;

[0051] If R b 2 If <0.65, then the calculation formula is SD=a1·TUB a2 Calculate the water transparency value;

[0052] A4: Conduct large-scale water quality monitoring of the river basin;

[0053] The detection device, into which the transparency value calculation model was entered in step A3, is immersed in the water. Turbidity sensor 2 detects the turbidity of the water, phosphate sensor 3 detects the phosphate concentration in the water, and calculates the water transparency value according to the program set in step A3. Photoelectric conversion and data processing module 5 transmits the calculated water transparency value to transparency value display and storage module 6 for display and storage.

[0054] Preferably, in step A1, the turbidity and phosphate concentration of the water are detected by turbidity sensor 2 and phosphate sensor 3, and the water transparency value at each point in step A1 is determined by the Seymour disk method; the number of points with different water quality differences in step A1 is 30-60.

[0055] Preferably, in step A2, the calculation model formula is SD=a1·TUB a2 The parameter ranges are as follows: 250≤a1≤350, -0.63≤a2≤-0.53.

[0056] Preferably, in step A3, the calculation model formula is SD = c1·TUB. c2 +c3·PO4 - The parameter range in +c4 is as follows: -6.255×10 5 ≤c1≤6.135×10 5 -0.3264≤c2≤0.3296, 34≤c3≤47, -6.134×10 5 ≤c4≤6.256×10 5 .

[0057] Preferred, such as Figure 3 As shown, in step A4, the turbidity sensor 2 and the phosphate sensor 3 are immersed in the water. The detection device can be held in hand or fixed on the hull 8, with the installation position located 10-20cm below the water surface 7 of the hull 8, ensuring that the turbidity sensor 2 and the phosphate sensor 3 are fully immersed below the water surface 7; or the detection device can be fixed at a certain point in the water to detect the change in the water transparency at that point over time.

[0058] Preferably, this method can be applied to the transparency detection of rivers, lakes, reservoirs, and various inland water bodies.

[0059] Furthermore, in this embodiment, the turbidity sensor 2 and the phosphate sensor 3 are detected using the principle of optical sensors.

[0060] Taking a specific set of data as an example, the steps of the above method are performed as follows:

[0061] First, following step A1, 47 locations with varying water quality were selected, and PO4 levels were collected at each location. - Value, TUB value, SD value;

[0062] Then run step A2, substituting the above 47 TUB and SD values ​​into the formula: SD = a1·TUB a2 The fitting process is performed to obtain parameters a1 and a2. In this embodiment, a 1＝ 301.90; a2=-0.58; SD=301.90*TUB -0.58 goodness of fit R 2 =0.71, such as Figure 5 As shown;

[0063] Then run step A2 to process the above 47 PO4 particles. - Substituting the values ​​and SD into the formula: SD = b1·PO4 - Perform a fit in +b2 and obtain the goodness-of-fit value R of the formula. b 2 In this embodiment, b 1＝ 61.63; b2=15.06; SD=61.63*PO4 - The goodness-of-fit R-value is +15.06. b 2 =0.70, such as Figure 6 As shown;

[0064] Run step A2 to process the above 47 TUB values ​​and PO4. - Substituting the values ​​and SD into the formula: SD = c1·TUB c2 +c3·PO4 - +c4, obtaining the values ​​of parameters c1-c4 are -5981.60, 0.00321, 40.26, and 6068.64 respectively, and the formula SD = -5981.60 × TUB 0.00321 +40.26×PO4 - The goodness-of-fit R-value is +6068.64. 2 =0.82, such as Figure 7 As shown; where the goodness of fit R 2 The closer the value is to 1, the better the fit.

[0065] Then, step A3 is executed, and the three formulas mentioned above are entered into the photoelectric conversion and data processing module 5, and the detection device is immersed in water for detection.

[0066] For example, if the turbidity concentration and phosphate concentration at a certain point are 3.0 NTU and 0.25 mg / L respectively, then in this embodiment, the formula SD = 61.63 * PO4- The goodness-of-fit R-value is +15.06. b 2 =0.70, which is greater than 0.65, therefore the above TUB value and PO4 - Substituting the value into the formula SD = -5981.60 × TUB 0.00321 +40.26×PO4 - +6068.64 Calculate the water transparency value (TUB = 3.0, PO4). - =0.25), the water transparency value SD is about 120cm, and it is displayed in the transparency value display and storage module 6, while storing relevant information.

[0067] This invention relates to an apparatus and method for detecting water transparency using turbidity and phosphate sensors, which has the following beneficial effects:

[0068] 1. This invention establishes a correlation between water transparency and water turbidity and phosphate concentration, enabling rapid detection of water transparency. Compared to the traditional Sebschler disk method, this invention effectively avoids measurement errors caused by subjective judgment of the measurer, weather conditions, high-velocity water bodies, poor lighting, etc. Furthermore, the device and method of this invention are simple to operate and quick to learn, effectively improving the efficiency of watershed water quality monitoring.

[0069] 2. This invention utilizes turbidity sensor 2 and phosphate sensor 3 to achieve real-time monitoring of water quality, and can quickly reflect the transparency of water bodies, greatly saving manpower and time costs for monitoring the transparency of water bodies in the basin. The monitoring results of transparency are also more objective, effectively avoiding the influence of human and environmental factors.

[0070] 3. This invention reduces manual operation. After the water transparency value calculation model is entered, no manual operation is required. The water transparency can be fixed at a certain point in the watershed to monitor the changes in water transparency over time.

[0071] 4. This invention solves the problem of the traditional Seibert disk method being easily affected by human and environmental factors when measuring water transparency. Furthermore, this invention can realize real-time monitoring of water transparency, with a simple device and high detection efficiency. It is suitable for large-scale monitoring and long-term fixed-point monitoring of water transparency in watersheds to understand the spatiotemporal changes of water transparency in watersheds. The monitoring results of transparency are more objective and effectively avoid the influence of human and environmental factors on the detection results.

[0072] Therefore, this invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0073] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A device for detecting water transparency using turbidity and phosphate sensors, characterized in that: The system includes a housing (1), a turbidity sensor (2), a phosphate sensor (3), a data transmission line (4), a photoelectric conversion and data processing module (5), and a transparency value display and storage module (6). The turbidity sensor (2), the phosphate sensor (3), and the transparency value display and storage module (6) are mounted on the housing (1), and the photoelectric conversion and data processing module (5) is mounted inside the housing (1). The turbidity sensor (2) and the phosphate sensor (3) are connected to the photoelectric conversion and data processing module (5) via the data transmission line (4), and the photoelectric conversion and data processing module (5) is connected to the transparency value display and storage module (6) via the data transmission line (4). The turbidity sensor (2) is used to detect the turbidity of the water, and the phosphate sensor (3) is used to detect the phosphate concentration in the water. The photoelectric conversion and data processing module (5) is equipped with a transparency value calculation model; The calculation model for transparency and turbidity of water is: SD = a1·TUB a2 ; The calculation model for transparency value and phosphate concentration is: SD = b1·PO4 - +b2; The calculation model for transparency value in relation to water turbidity and phosphate concentration is: SD = c1·TUB c2 +c3·PO4 - +c4; Collect water turbidity, phosphate concentration, and water transparency values ​​from the application watershed; substitute the water turbidity and water transparency values ​​into the calculation model formula SD=a1·TUB a2 The parameters a1 and a2 were obtained by fitting the data; the phosphate concentration and water transparency were substituted into the calculation model formula SD=b1·PO4. - We perform a fit using +b2 and obtain the goodness-of-fit value R of the formula. b 2 Substitute the water turbidity, phosphate concentration, and water transparency values ​​into the calculation model formula SD=c1·TUB c2 +c3·PO4 - +c4 is used for fitting, and the value of parameter c1-c4 is obtained; To determine whether the correlation between water transparency and phosphate concentration is stable, i.e., to determine the formula SD = b1·PO4 - The goodness-of-fit value R in +b2 b 2 Is R greater than or equal to 0.65? b 2 If the value is ≥0.65, then the calculation formula is SD=c1·TUB c2 +c3·PO4 - +c4 calculates the water transparency value; if R b 2 If <0.65, then the calculation formula is SD=a1·TUB a2 Calculate water transparency; SD represents water transparency; TUB represents water turbidity; PO4 - This indicates the phosphate concentration.

2. The device for detecting water transparency using turbidity and phosphate sensors according to claim 1, characterized in that: The outer shell (1) is a hollow cylindrical part. The turbidity sensor (2) and phosphate sensor (3) are set on the bottom surface of the outer shell (1). The photoelectric conversion and data processing module (5) is set inside the outer shell (1). The transparency value display and storage module (6) is set on the top surface of the outer shell (1) to display the water transparency value for easy reading.

3. The device for detecting water transparency using turbidity and phosphate sensors according to claim 1, characterized in that: The photoelectric conversion and data processing module (5) is used to receive the water turbidity parameters and phosphate concentration parameters detected by the turbidity sensor (2) and the phosphate sensor (3), and to perform data calculation and processing on the water turbidity parameters and phosphate concentration parameters to obtain the water transparency; the photoelectric conversion and data processing module (5) transmits the processed data to the transparency value display and storage module (6), and the transparency value display and storage module (6) displays and stores the data.

4. A method for detecting water transparency using turbidity and phosphate sensors, employing the apparatus for detecting water transparency using turbidity and phosphate sensors as described in any one of claims 1-3, characterized in that: The steps are as follows: S1: Collect water quality data for the application watershed; In the watershed where the device uses turbidity and phosphate sensors to detect water transparency, several points with different water quality are selected, and the turbidity, phosphate concentration, and water transparency values ​​of each point are collected. S2: Establish a model for calculating transparency values; Substitute the water turbidity and water transparency values ​​measured in step S1 into the calculation model formula SD=a1·TUB a2 The parameters a1 and a2 were obtained by fitting the data; the phosphate concentration and water transparency values ​​measured in step S1 were substituted into the calculation model formula SD=b1·PO4 - We perform a fit using +b2 and obtain the goodness-of-fit value R of the formula. b 2 ; Substitute the water turbidity, phosphate concentration, and water transparency values ​​measured in step S1 into the calculation model formula SD=c1·TUB c2 +c3·PO4 - +c4 is used for fitting to obtain the values ​​of parameters c1-c4; SD represents water transparency; TUB represents water turbidity; PO4 - Indicates phosphate concentration; S3: Inputting the transparency value calculation model and setting the program; The transparency value calculation model established in step S2 is entered into the photoelectric conversion and data processing module (5); the program settings are as follows: To determine whether the correlation between water transparency and phosphate concentration is stable, i.e., to determine the formula SD = b1·PO4 - The goodness-of-fit value R in +b2 b 2 Is it greater than or equal to 0.65? If R b 2 If the value is ≥0.65, then the calculation formula is SD=c1·TUB c2 +c3·PO4 - +c4 calculates the water transparency value; If R b 2 If <0.65, then the calculation formula is SD=a1·TUB a2 Calculate the water transparency value; S4: Conduct large-scale water quality monitoring in the river basin; The device for detecting water transparency using turbidity and phosphate sensors, which is used to input the transparency value calculation model in step S3, is immersed in the water. The turbidity sensor (2) detects the turbidity of the water, and the phosphate sensor (3) detects the phosphate concentration in the water. The water transparency value is calculated according to the program set in step S3. The photoelectric conversion and data processing module (5) transmits the calculated water transparency value to the transparency value display and storage module (6) for display and storage.

5. The method for detecting water transparency using turbidity and phosphate sensors according to claim 4, characterized in that: In step S1, the turbidity and phosphate concentration of the water body are detected by turbidity sensor (2) and phosphate sensor (3). The water transparency value at each point in step S1 is determined by the Seymour disk method. The number of points with different water quality in step S1 is 30-60.

6. The method for detecting water transparency using turbidity and phosphate sensors according to claim 4, characterized in that: In step S2, the calculation model formula SD=a1·TUB is used. a2 The parameter ranges are as follows: 250≤a1≤350, -0.63≤a2≤-0.

53.

7. The method for detecting water transparency using turbidity and phosphate sensors according to claim 4, characterized in that: In step S3, the calculation model formula SD=c1·TUB is used. c2 +c3·PO4 - The parameter range in +c4 is as follows: -6.255×10 5 ≤c1≤6.135×10 5 -0.3264≤c2≤0.3296, 34≤c3≤47, -6.134×10 5 ≤c4≤6.256×10 5 .

8. The method for detecting water transparency using turbidity and phosphate sensors according to claim 4, characterized in that: In step S4, the turbidity sensor (2) and phosphate sensor (3) are immersed in the water. The device for detecting water transparency using turbidity and phosphate sensors can be handheld or fixed to the hull (8). The installation position of the turbidity sensor (2) and phosphate sensor (3) is 10-20cm below the water surface (7) to ensure that the turbidity sensor (2) and phosphate sensor (3) are fully immersed below the water surface (7); or the device for detecting water transparency using turbidity and phosphate sensors is fixed at a certain point in the water and the change in water transparency at that point over time is detected.

9. The method for detecting water transparency using turbidity and phosphate sensors according to claim 4, characterized in that: This method can be applied to the transparency detection of various inland water bodies.

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