Discharge outlet tracing method and system based on water quality monitoring

Abstract

The invention relates to the technical field of water quality monitoring, and discloses a discharge outlet tracing method and system based on water quality monitoring, and the method comprises the steps: dividing a to-be-detected water area into an upstream region, a midstream region and a downstream region according to the flowing direction, respectively collecting water quality monitoring data, and taking the region with the abnormal water quality monitoring data as a first discharge region; taking an upstream water area of the first discharge area as a second discharge area, and determining a final discharge area according to the water quality monitoring data of each sampling point in the first discharge area and the second discharge area; according to the water body parameters of the final discharge area, the sampling point spacing and the sampling frequency are determined, the sampling point spacing is adjusted in combination with the environmental parameters, and the sampling frequency is adjusted according to the pollutant concentration change at different time; and generating a concentration change curve of pollutants along with the water flow direction according to the water quality monitoring data of the finally adjusted sampling points, and determining the specific position of a discharge outlet. According to the invention, accurate discharge port positioning is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of water quality monitoring, and in particular to a discharge outlet source tracing method and system based on water quality monitoring. Background Art

[0002] Water quality monitoring is the process of monitoring and measuring the types of pollutants in water bodies, the concentrations of various pollutants and their changing trends, and evaluating the water quality. The monitoring scope is very wide, including unpolluted and polluted natural water (rivers, lakes, seas and groundwater) and various industrial drainage. With the improvement of environmental protection awareness, the monitoring and control of water pollution has become an important task for governments and environmental protection departments of various countries. The sources of water pollution mainly include industrial emissions, agricultural drainage, domestic sewage, etc. There are many types of pollutants, and the concentration changes are also affected by many factors. Therefore, accurately locating the discharge port and monitoring the water quality in real time has become one of the key means to prevent and control water pollution.

[0003] Traditional methods of tracing the source of discharge outlets usually rely on manual inspections and water quality sample analysis, but these methods are limited by the frequency of manual intervention and monitoring accuracy, making it difficult to obtain comprehensive and accurate pollution source data in real time. In recent years, with the rapid development of sensor technology and water quality monitoring equipment, real-time water quality monitoring has become one of the core technologies for tracing the source of water pollution. Water quality monitoring equipment can automatically collect various water quality parameters in water bodies around the clock, effectively improving the efficiency and accuracy of tracing the source of pollution. However, in practical applications, due to the complexity of water flow and the influence of various factors (such as water flow speed, weather conditions, etc.), the data from a single monitoring point often cannot accurately reflect the diffusion path of the pollution source and the changing trend of pollutant concentration. Therefore, how to scientifically divide the water area and set reasonable sampling points, and how to adjust the sampling frequency and spacing according to changes in environmental parameters and pollutant concentrations, have become key issues in improving the accuracy and efficiency of tracing the source.

[0004] Therefore, it is necessary to provide a discharge outlet tracing method and system based on water quality monitoring to solve the problem that the traditional discharge outlet tracing method relies on manual inspections and single monitoring point data, making it difficult to obtain comprehensive and accurate pollution source information in real time, and cannot effectively deal with the impact of water flow complexity and environmental changes on pollutant diffusion. Summary of the invention

[0005] In view of this, the present invention proposes a discharge outlet tracing method and system based on water quality monitoring, aiming to solve the problem that the traditional discharge outlet tracing method relies on manual inspections and single monitoring point data, making it difficult to obtain comprehensive and accurate pollution source information in real time, and cannot effectively deal with the impact of water flow complexity and environmental changes on pollutant diffusion.

[0006] On the one hand, the present invention proposes a method for tracing the source of a discharge outlet based on water quality monitoring, comprising:

[0007] The water area to be tested is divided into an upstream area, a midstream area and a downstream area according to the flow direction, and water quality monitoring data of the upstream area, the midstream area and the downstream area are collected respectively, and the area where the water quality monitoring data is abnormal is taken as the first discharge area;

[0008] The upstream waters of the first discharge area are used as the second discharge area, a plurality of sampling points are set in the first discharge area and the second discharge area, and the final discharge area is determined according to the water quality monitoring data of each of the sampling points in the first discharge area and the second discharge area;

[0009] Determine the sampling point spacing and sampling frequency based on the water body parameters of the final discharge area, adjust the sampling point spacing in combination with environmental parameters, and adjust the sampling frequency based on changes in pollutant concentrations at different times;

[0010] Based on the water quality monitoring data of the sampling points after the final adjustment, a concentration change curve of pollutants along the water flow direction is generated to obtain the pollutant diffusion path and determine the specific location of the discharge port.

[0011] Furthermore, the method of dividing the water area to be tested into an upstream area, a midstream area and a downstream area according to the flow direction, collecting water quality monitoring data of the upstream area, the midstream area and the downstream area respectively, and taking the area where the water quality monitoring data is abnormal as the first discharge area includes:

[0012] If there is an abnormality in the water quality test data of one area among the upstream area, midstream area and downstream area, this area shall be regarded as the first discharge area;

[0013] If there are two areas in the upstream area, midstream area and downstream area with abnormal water quality test data, these two areas will be regarded as the first discharge area;

[0014] If the water quality monitoring data in the upstream, midstream and downstream areas are all abnormal, these three areas will be regarded as the final discharge areas.

[0015] Furthermore, when the upstream waters of the first discharge area are used as the second discharge area, it includes:

[0016] If the upstream area is the first discharge area, then the upstream area is the final discharge area;

[0017] If the midstream area is the first discharge area, then the upstream area is the second discharge area;

[0018] If the downstream area is the first discharge area, the midstream area and the upstream area are the second discharge area;

[0019] If the upstream area and the midstream area are both the first discharge area, then the upstream area and the midstream area are the final discharge area;

[0020] If the upstream area and the downstream area are both the first discharge area, the midstream area is the second discharge area;

[0021] If the midstream area and the downstream area are both the first discharge area, the upstream area is the second discharge area.

[0022] Furthermore, the setting of a plurality of sampling points in the first discharge area and the second discharge area, and determining the final discharge area according to the water quality monitoring data of each of the sampling points in the first discharge area and the second discharge area, includes:

[0023] The area where the water quality monitoring data of the sampling points in the first discharge area and the second discharge area appear abnormal is recorded as the final discharge area.

[0024] Further, the water body parameters include the final discharge area length and water flow velocity;

[0025] The environmental parameters include wind direction and wind speed.

[0026] Furthermore, the determination of the sampling point spacing and sampling frequency according to the water body parameters of the final discharge area includes:

[0027] Determine the sampling point spacing according to the final discharge area length, and set a first preset length and a second preset length, wherein the first preset length is smaller than the second preset length;

[0028] If the final discharge area length is less than the first preset length, setting a first number of sampling points;

[0029] If the final discharge area length is greater than or equal to the first preset length and less than or equal to the second preset length, setting a second number of sampling points;

[0030] If the final discharge area length is greater than the second preset length, setting a third number of sampling points;

[0031] The first number is smaller than the second number, the second number is smaller than the third number, and the sampling points are evenly arranged in the final discharge area along the water flow direction.

[0032] Furthermore, when determining the sampling point spacing and sampling frequency according to the water body parameters of the final discharge area, it also includes:

[0033] Determine the sampling frequency according to the water flow velocity, set a first water flow velocity and a second water flow velocity, wherein the first water flow velocity is less than the second water flow velocity;

[0034] If the water flow velocity is less than the first water flow velocity, determining the sampling frequency to be the first frequency;

[0035] If the water flow velocity is greater than or equal to the first water flow velocity and less than or equal to the second water flow velocity, determining the sampling frequency to be the second frequency;

[0036] If the water flow velocity is greater than the second water flow velocity, determining the sampling frequency to be a third frequency;

[0037] The first frequency is smaller than the second frequency, and the second frequency is smaller than the third frequency.

[0038] Furthermore, when adjusting the sampling point spacing in combination with environmental parameters, it includes:

[0039] If the wind direction is different from the water flow direction, it is determined that the spacing between the sampling points is not adjusted;

[0040] If the wind direction is the same as the water flow direction, it is determined that the sampling point spacing is adjusted, and a first wind speed and a second wind speed are set, wherein the first wind speed is less than the second wind speed;

[0041] If the wind speed is less than the first wind speed, adjusting the sampling point spacing by a first adjustment coefficient;

[0042] If the wind speed is greater than or equal to the first wind speed and less than or equal to the second wind speed, adjusting the sampling point spacing by a second adjustment coefficient;

[0043] If the wind speed is greater than the second wind speed, adjusting the sampling point spacing by a third adjustment coefficient;

[0044] Among them, 0>first adjustment coefficient>second adjustment coefficient>third adjustment coefficient>1.

[0045] Furthermore, the adjustment of the sampling frequency according to the change of pollutant concentration at different times includes:

[0046] Calculate the average value of the pollutant concentration of all sampling points at the same time, and after a preset time interval, calculate the average value of the pollutant concentration of all sampling points at the same time, and determine whether to adjust the sampling frequency according to the change value of the two average values;

[0047] Setting a minimum change value, and if the change value is less than or equal to the minimum change value, determining not to adjust the sampling frequency;

[0048] If the change value is greater than the minimum change value, it is determined that the sampling frequency is adjusted, and a first change value and a second change value are set, and the first change value is less than the second change value;

[0049] If the change value is less than the first change value, adjusting the sampling frequency by a first adjustment coefficient;

[0050] If the change value is greater than or equal to the first change value and less than or equal to the second change value, adjusting the sampling frequency by a second adjustment coefficient;

[0051] If the change value is greater than the second change value, adjusting the sampling frequency by a third adjustment coefficient;

[0052] Among them, 1<first adjustment coefficient<second adjustment coefficient<third adjustment coefficient<2.

[0053] Compared with the prior art, the beneficial effect of the present invention is that the present invention can more accurately identify the location and scope of influence of the pollution source through regional monitoring, and reduce the error caused by water flow fluctuations. Secondly, after determining the first discharge area, by further monitoring the upstream area and setting sampling points, the diffusion path of the pollutants can be tracked more carefully to ensure the high accuracy of the tracing process. This hierarchical and regional sampling strategy not only improves the reliability of tracing, but also can flexibly adjust the sampling frequency and the spacing between sampling points according to the pollution characteristics of different regions, so as to achieve real-time monitoring and dynamic adjustment, and further optimize the monitoring efficiency and the accuracy of data collection. Combined with the adjustment of environmental parameters, it can effectively respond to the impact of natural environmental changes and ensure the stability of monitoring results. Finally, by generating a pollutant concentration change curve, the diffusion trend of pollutants can be clearly displayed, thereby accurately locating the discharge port. This method can comprehensively and systematically identify multiple emission sources, provide a scientific basis for water pollution prevention and control, and has high application value, especially in the tracing and supervision of pollution sources in complex water environments.

[0054] On the other hand, the present application also provides a discharge outlet tracing system based on water quality monitoring, comprising:

[0055] A region division module is used to divide the water area to be detected into an upstream area, a midstream area and a downstream area according to the flow direction, collect water quality monitoring data of the upstream area, the midstream area and the downstream area respectively, and take the area where the water quality monitoring data is abnormal as the first discharge area;

[0056] An area determination module, used to take the upstream waters of the first discharge area as the second discharge area, set a number of sampling points in the first discharge area and the second discharge area, and determine the final discharge area according to the water quality monitoring data of each of the sampling points in the first discharge area and the second discharge area;

[0057] A parameter determination module, used to determine the sampling point spacing and sampling frequency according to the water body parameters of the final discharge area, adjust the sampling point spacing in combination with environmental parameters, and adjust the sampling frequency according to the changes in pollutant concentration at different times;

[0058] The discharge port determination module is used to generate a pollutant concentration change curve along the water flow direction according to the water quality monitoring data of the final adjusted sampling point, obtain the pollutant diffusion path, and determine the specific location of the discharge port.

[0059] It can be understood that the discharge outlet tracing method and system based on water quality monitoring provided in the present application have the same beneficial effects and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0061] Figure 1 A flow chart of a method for tracing the source of a discharge outlet based on water quality monitoring provided by an embodiment of the present invention;

[0062] Figure 2 A functional block diagram of a discharge outlet tracing system based on water quality monitoring provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0063] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0064] In some embodiments of the present application, see Figure 1 As shown, this embodiment provides a method for tracing the source of a discharge outlet based on water quality monitoring, comprising the following steps:

[0065] S100, dividing the water area to be tested into an upstream area, a midstream area and a downstream area according to the flow direction, collecting water quality monitoring data of the upstream area, the midstream area and the downstream area respectively, and taking the area where the water quality monitoring data is abnormal as the first discharge area;

[0066] S200, taking the waters upstream of the first discharge area as the second discharge area, setting a number of sampling points in the first discharge area and the second discharge area, and determining the final discharge area according to the water quality monitoring data of each sampling point in the first discharge area and the second discharge area;

[0067] S300, determining the sampling point spacing and sampling frequency according to the water body parameters of the final discharge area, adjusting the sampling point spacing in combination with environmental parameters, and adjusting the sampling frequency according to the changes in pollutant concentrations at different times;

[0068] S400, generating a pollutant concentration variation curve along the water flow direction according to the water quality monitoring data of the sampling point after the final adjustment, obtaining the pollutant diffusion path, and determining the specific location of the discharge port.

[0069] It is understandable that the present invention can more accurately identify the location and scope of influence of pollution sources through regional monitoring, and reduce errors caused by water flow fluctuations. Secondly, after determining the first discharge area, by further monitoring the upstream area and setting sampling points, the diffusion path of pollutants can be tracked more carefully to ensure the high accuracy of the tracing process. This hierarchical and regional sampling strategy not only improves the reliability of tracing, but also flexibly adjusts the sampling frequency and sampling point spacing according to the pollution characteristics of different regions, achieves real-time monitoring and dynamic adjustment, and further optimizes the monitoring efficiency and data collection accuracy. Combined with the adjustment of environmental parameters, it can effectively respond to the impact of changes in the natural environment and ensure the stability of the monitoring results. Finally, by generating a pollutant concentration change curve, the diffusion trend of pollutants can be clearly displayed, thereby accurately locating the discharge port. This method can comprehensively and systematically identify multiple emission sources, provide a scientific basis for water pollution prevention and control, and has high application value, especially in the tracing and supervision of pollution sources in complex water environments.

[0070] In some embodiments of the present application, the water area to be detected is divided into an upstream area, a midstream area and a downstream area according to the flow direction, and water quality monitoring data of the upstream area, the midstream area and the downstream area are collected respectively. When the area where the water quality monitoring data is abnormal is used as the first discharge area, it includes:

[0071] If there is an abnormality in the water quality test data of one area among the upstream area, midstream area and downstream area, this area shall be regarded as the first discharge area;

[0072] If there are two areas in the upstream area, midstream area and downstream area with abnormal water quality test data, these two areas will be regarded as the first discharge area;

[0073] If the water quality monitoring data in the upstream, midstream and downstream areas are all abnormal, these three areas will be regarded as the final discharge areas.

[0074] In some embodiments of the present application, when the waters upstream of the first discharge area are used as the second discharge area, it includes:

[0075] If the upstream area is the first discharge area, then the upstream area is the final discharge area;

[0076] If the midstream area is the first discharge area, then the upstream area is the second discharge area;

[0077] If the downstream area is the first discharge area, the midstream area and the upstream area are the second discharge areas;

[0078] If the upstream area and the midstream area are both the first discharge areas, then the upstream area and the midstream area are the final discharge areas;

[0079] If both the upstream and downstream areas are the first discharge area, the midstream area is the second discharge area;

[0080] If the midstream area and the downstream area are both the first discharge area, the upstream area is the second discharge area.

[0081] In some embodiments of the present application, a plurality of sampling points are set in the first discharge area and the second discharge area, and the final discharge area is determined according to the water quality monitoring data of each sampling point in the first discharge area and the second discharge area, including:

[0082] The area where the water quality monitoring data of the sampling points in the first discharge area and the second discharge area appear abnormal is recorded as the final discharge area.

[0083] It is understandable that by dividing the water area into upstream, midstream and downstream areas according to the direction of water flow, and flexibly handling abnormal water quality in different areas, the pollution source can be located more accurately. If the water quality monitoring data in one or more areas is abnormal, the potential discharge area can be identified in time, and the final discharge area can be gradually determined. This method has strong adaptability and flexibility, and can handle abnormal data in different situations to avoid misjudgment caused by a single data point or area. By setting multiple sampling points and making judgments based on abnormal water quality monitoring data, the identification accuracy of the pollution source can be further optimized and the accuracy of tracing can be improved. At the same time, this method can dynamically adjust the scope of the emission source according to the diffusion characteristics of pollutants in different areas, effectively avoiding the deviation caused by ignoring environmental changes and water flow in traditional methods, and improving the scientificity and real-time nature of pollution source tracing.

[0084] In some embodiments of the present application, the water body parameters include the final discharge area length and water flow velocity;

[0085] Environmental parameters include wind direction and wind speed.

[0086] In some embodiments of the present application, when determining the sampling point spacing and sampling frequency according to the water body parameters of the final discharge area, it includes:

[0087] Determine the sampling point spacing according to the final discharge area length, and set a first preset length and a second preset length, wherein the first preset length is smaller than the second preset length;

[0088] If the final discharge area length is less than the first preset length, setting a first number of sampling points;

[0089] If the final discharge area length is greater than or equal to the first preset length and less than or equal to the second preset length, setting a second number of sampling points;

[0090] If the final discharge area length is greater than the second preset length, setting a third number of sampling points;

[0091] The first number is smaller than the second number, the second number is smaller than the third number, and the sampling points are evenly arranged in the final discharge area along the water flow direction.

[0092] It is understandable that the present invention realizes dynamic adjustment of the spacing and frequency of sampling points by combining water parameters (such as the final discharge area length and water flow velocity) and environmental parameters (such as wind direction and wind speed). By determining the spacing of the sampling points according to the length of the final discharge area, and setting different numbers of sampling points according to different area lengths, the sampling density can be increased in areas where the concentration of pollutants changes greatly, thereby improving the accuracy of monitoring. At the same time, setting different numbers of sampling points (such as the first number, the second number, and the third number) according to the change in area length can reasonably allocate resources according to actual needs, ensure the uniform distribution of sampling points, avoid data vacancies or repeated sampling, and more accurately capture the concentration change trend of pollutants. Provide high-quality monitoring data, and further optimize the analysis of pollutant diffusion paths in combination with environmental parameters (such as wind speed and wind direction), thereby improving the accuracy and real-time nature of the traceability results. This method is particularly effective in complex water environments, and can cope with monitoring needs under different water conditions, optimize resource utilization and improve monitoring efficiency.

[0093] In some embodiments of the present application, when determining the sampling point spacing and sampling frequency according to the water body parameters of the final discharge area, it also includes:

[0094] Determine the sampling frequency according to the water flow velocity, set a first water flow velocity and a second water flow velocity, wherein the first water flow velocity is less than the second water flow velocity;

[0095] If the water flow velocity is less than the first water flow velocity, the sampling frequency is determined to be the first frequency;

[0096] If the water flow velocity is greater than or equal to the first water flow velocity and less than or equal to the second water flow velocity, the sampling frequency is determined to be the second frequency;

[0097] If the water flow velocity is greater than the second water flow velocity, the sampling frequency is determined to be the third frequency;

[0098] The first frequency is smaller than the second frequency, and the second frequency is smaller than the third frequency.

[0099] It is understandable that the present invention further improves the accuracy and efficiency of water quality monitoring by dynamically adjusting the sampling frequency in combination with the water flow velocity. According to the conditions of different water flow velocities, three sampling frequencies (first frequency, second frequency and third frequency) are set, so that when the water flow velocity is low, the sampling frequency is low, reducing unnecessary monitoring burden; and when the water flow velocity is fast, the sampling frequency is increased to more accurately capture the changes and diffusion of pollutants. The sampling frequency can be flexibly adjusted according to the actual water flow conditions, avoiding data redundancy or loss that may be caused by fixed frequency sampling. In addition, reasonable sampling frequency adjustment helps to obtain more data in real time when the pollutant concentration fluctuates greatly or diffuses rapidly, and improves the accuracy of pollution source tracing. In short, the dynamic sampling frequency adjustment based on water flow velocity not only optimizes the use of monitoring resources, but also can more accurately reflect the dynamic changes of pollutants in water bodies, and enhance the adaptability and real-time performance of the system.

[0100] In some embodiments of the present application, when the sampling point spacing is adjusted in combination with environmental parameters, it includes:

[0101] If the wind direction is different from the water flow direction, it is determined that the sampling point spacing will not be adjusted;

[0102] If the wind direction is the same as the water flow direction, it is determined that the spacing between the sampling points is adjusted, and the first wind speed and the second wind speed are set, wherein the first wind speed is less than the second wind speed;

[0103] If the wind speed is less than the first wind speed, the sampling point spacing is adjusted by the first adjustment coefficient;

[0104] If the wind speed is greater than or equal to the first wind speed and less than or equal to the second wind speed, the sampling point spacing is adjusted by the second adjustment coefficient;

[0105] If the wind speed is greater than the second wind speed, the sampling point spacing is adjusted by the third adjustment coefficient;

[0106] Among them, 0>first adjustment coefficient>second adjustment coefficient>third adjustment coefficient>1.

[0107] It is understandable that the present invention dynamically adjusts the sampling point spacing by combining wind speed and wind direction, taking into account the impact of wind on the diffusion of pollutants, especially floating pollutants (such as oil spills) on the water surface, and improving the monitoring adaptability. When the wind direction is the same as the direction of the water flow, the wind speed will affect the diffusion rate of surface pollutants. Therefore, three adjustment coefficients (the first, second and third adjustment coefficients) are set according to different wind speeds to dynamically adjust the sampling point spacing. When the wind speed is low, the sampling point spacing can be appropriately expanded, and when the wind speed is high, the sampling point spacing is reduced to ensure that the impact of wind speed on the diffusion of surface pollutants can be captured accurately, avoiding omissions or low-frequency sampling caused by excessive spacing between sampling points when the wind speed is high. Through flexible adjustment coefficients and fine spacing adjustment, this method improves the reliability and accuracy of water quality monitoring data, especially in an environment with high wind speed, it can more accurately reflect the distribution and diffusion of pollutants, and provide more accurate data support for tracing the source of pollution.

[0108] In some embodiments of the present application, when the sampling frequency is adjusted according to the change of pollutant concentration at different times, it includes:

[0109] Calculate the average value of pollutant concentrations at all sampling points at the same time. After a preset time interval, calculate the average value of pollutant concentrations at all sampling points at the same time. Determine whether to adjust the sampling frequency based on the change in the two average values.

[0110] Set the minimum change value. If the change value is less than or equal to the minimum change value, the sampling frequency will not be adjusted.

[0111] If the change value is greater than the minimum change value, it is determined that the sampling frequency is adjusted, and a first change value and a second change value are set, and the first change value is less than the second change value;

[0112] If the change value is less than the first change value, the sampling frequency is adjusted by the first adjustment coefficient;

[0113] If the change value is greater than or equal to the first change value and less than or equal to the second change value, the sampling frequency is adjusted by the second adjustment coefficient;

[0114] If the change value is greater than the second change value, the sampling frequency is adjusted by a third adjustment coefficient;

[0115] Among them, 1<first adjustment coefficient<second adjustment coefficient<third adjustment coefficient<2.

[0116] It is understandable that the present invention can more accurately reflect the fluctuation of pollutants in waters by dynamically adjusting the sampling frequency according to the change of pollutant concentration at different times. Specifically, the average pollutant concentration of all sampling points at the same time is calculated, and the change value of the two time points is compared to determine whether the sampling frequency needs to be adjusted. When the pollutant concentration changes slightly (lower than the preset minimum change value), the sampling frequency is kept low to avoid unnecessary data redundancy; and when the change value is greater than the minimum value, the sampling frequency is flexibly adjusted according to the magnitude of the change amplitude to ensure that the sampling frequency is increased when the pollutant concentration fluctuates greatly and more data points are captured. By setting different change values ​​and adjustment coefficients (first, second, and third adjustment coefficients), the adjustment of the sampling frequency is more refined and meets actual needs, thereby improving the monitoring sensitivity and accuracy of pollutant concentration changes. This method can reasonably allocate sampling frequency and sampling amount under the condition of different pollutant concentration changes, optimize resource use, avoid the problems caused by excessively high or low frequency sampling, and ensure the efficiency and accuracy of pollution source monitoring. Specifically, the types of pollutants are not specifically limited, and the actual pollution situation shall prevail.

[0117] On the other hand, see Figure 2 As shown, the present application also provides a discharge outlet tracing system based on water quality monitoring, which is used to apply the above-mentioned discharge outlet tracing method based on water quality monitoring, including:

[0118] The area division module is used to divide the water area to be tested into upstream area, midstream area and downstream area according to the flow direction, collect water quality monitoring data of the upstream area, midstream area and downstream area respectively, and take the area with abnormal water quality monitoring data as the first discharge area;

[0119] An area determination module is used to take the upstream waters of the first discharge area as the second discharge area, set a number of sampling points in the first discharge area and the second discharge area, and determine the final discharge area according to the water quality monitoring data of each sampling point in the first discharge area and the second discharge area;

[0120] The parameter determination module is used to determine the sampling point spacing and sampling frequency according to the water body parameters of the final discharge area, adjust the sampling point spacing in combination with environmental parameters, and adjust the sampling frequency according to the changes in pollutant concentrations at different times;

[0121] The discharge port determination module is used to generate a pollutant concentration change curve along the water flow direction according to the water quality monitoring data of the final adjusted sampling point, obtain the pollutant diffusion path, and determine the specific location of the discharge port.

[0122] It can be understood that the present invention realizes efficient identification and accurate tracing of water pollution sources. The regional division module reasonably divides the water area according to the direction of water flow, and promptly discovers abnormal areas by collecting water quality data from each area to determine potential emission sources. The regional determination module further refines the scope of emission sources and combines multi-point sampling data to ensure the accuracy of the emission area. The parameter determination module dynamically adjusts the sampling point spacing and sampling frequency according to water body and environmental parameters, thereby improving the sensitivity and efficiency of monitoring and ensuring that the details of pollutant concentration fluctuations can be captured. The discharge port determination module accurately infers the diffusion path of pollutants and the specific location of the discharge port by generating a pollutant concentration change curve, providing a scientific basis for tracing the source of pollution. Overall, the system can flexibly respond to different water environments and pollutant diffusion laws by integrating multiple modules, improves the accuracy, timeliness and reliability of water quality monitoring and pollution source tracing, and provides strong technical support for water quality management and pollution prevention.

[0123] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0124] The present application is described with reference to flowcharts and / or block diagrams of methods, devices (systems) and computer program products according to embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0125] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0126] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0127] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for tracing the source of a discharge outlet based on water quality monitoring, characterized in that: include: The water area to be tested is divided into an upstream area, a midstream area and a downstream area according to the flow direction, and water quality monitoring data of the upstream area, the midstream area and the downstream area are collected respectively, and the area where the water quality monitoring data is abnormal is taken as the first discharge area; The upstream waters of the first discharge area are used as the second discharge area, a plurality of sampling points are set in the first discharge area and the second discharge area, and the final discharge area is determined according to the water quality monitoring data of each of the sampling points in the first discharge area and the second discharge area; Determine the sampling point spacing and sampling frequency based on the water body parameters of the final discharge area, adjust the sampling point spacing in combination with environmental parameters, and adjust the sampling frequency based on changes in pollutant concentrations at different times; Based on the water quality monitoring data of the sampling points after the final adjustment, a concentration change curve of pollutants along the water flow direction is generated to obtain the pollutant diffusion path and determine the specific location of the discharge port.

2. The method for tracing the source of a discharge outlet based on water quality monitoring according to claim 1, characterized in that: The method of dividing the water area to be tested into an upstream area, a midstream area and a downstream area according to the flow direction, collecting water quality monitoring data of the upstream area, the midstream area and the downstream area respectively, and taking the area where the water quality monitoring data is abnormal as the first discharge area includes: If there is an abnormality in the water quality test data of one area among the upstream area, midstream area and downstream area, this area shall be regarded as the first discharge area; If there are two areas in the upstream area, midstream area and downstream area with abnormal water quality test data, these two areas will be regarded as the first discharge area; If the water quality monitoring data in the upstream, midstream and downstream areas are all abnormal, these three areas will be regarded as the final discharge areas.

3. The method for tracing the source of a discharge outlet based on water quality monitoring according to claim 2 is characterized in that: When the upstream waters of the first discharge area are used as the second discharge area, it includes: If the upstream area is the first discharge area, then the upstream area is the final discharge area; If the midstream area is the first discharge area, then the upstream area is the second discharge area; If the downstream area is the first discharge area, the midstream area and the upstream area are the second discharge area; If the upstream area and the midstream area are both the first discharge area, then the upstream area and the midstream area are the final discharge area; If the upstream area and the downstream area are both the first discharge area, the midstream area is the second discharge area; If the midstream area and the downstream area are both the first discharge area, the upstream area is the second discharge area.

4. The method for tracing the source of a discharge outlet based on water quality monitoring according to claim 3 is characterized in that: The method of setting a plurality of sampling points in the first discharge area and the second discharge area, and determining the final discharge area according to the water quality monitoring data of each of the sampling points in the first discharge area and the second discharge area, comprises: The area where the water quality monitoring data of the sampling points in the first discharge area and the second discharge area appear abnormal is recorded as the final discharge area.

5. The method for tracing the source of a discharge outlet based on water quality monitoring according to claim 4 is characterized in that: The water body parameters include the final discharge area length and water flow velocity; The environmental parameters include wind direction and wind speed.

6. The method for tracing the source of a discharge outlet based on water quality monitoring according to claim 5, characterized in that: Determining the sampling point spacing and sampling frequency according to the water body parameters of the final discharge area includes: Determine the sampling point spacing according to the final discharge area length, and set a first preset length and a second preset length, wherein the first preset length is smaller than the second preset length; If the final discharge area length is less than the first preset length, setting a first number of sampling points; If the final discharge area length is greater than or equal to the first preset length and less than or equal to the second preset length, setting a second number of sampling points; If the final discharge area length is greater than the second preset length, setting a third number of sampling points; The first number is smaller than the second number, the second number is smaller than the third number, and the sampling points are evenly arranged in the final discharge area along the water flow direction.

7. The method for tracing the source of a discharge outlet based on water quality monitoring according to claim 6, characterized in that: When the sampling point spacing and sampling frequency are determined according to the water body parameters of the final discharge area, the method further includes: Determine the sampling frequency according to the water flow velocity, set a first water flow velocity and a second water flow velocity, wherein the first water flow velocity is less than the second water flow velocity; If the water flow velocity is less than the first water flow velocity, determining the sampling frequency to be the first frequency; If the water flow velocity is greater than or equal to the first water flow velocity and less than or equal to the second water flow velocity, determining the sampling frequency to be the second frequency; If the water flow velocity is greater than the second water flow velocity, determining the sampling frequency to be a third frequency; The first frequency is smaller than the second frequency, and the second frequency is smaller than the third frequency.

8. The method for tracing the source of a discharge outlet based on water quality monitoring according to claim 7, characterized in that: When adjusting the sampling point spacing in combination with environmental parameters, it includes: If the wind direction is different from the water flow direction, it is determined that the spacing between the sampling points is not adjusted; If the wind direction is the same as the water flow direction, it is determined that the sampling point spacing is adjusted, and a first wind speed and a second wind speed are set, wherein the first wind speed is less than the second wind speed; If the wind speed is less than the first wind speed, adjusting the sampling point spacing by a first adjustment coefficient; If the wind speed is greater than or equal to the first wind speed and less than or equal to the second wind speed, adjusting the sampling point spacing by a second adjustment coefficient; If the wind speed is greater than the second wind speed, adjusting the sampling point spacing by a third adjustment coefficient; Among them, 0>first adjustment coefficient>second adjustment coefficient>third adjustment coefficient>1.

9. The method for tracing the source of a discharge outlet based on water quality monitoring according to claim 8, characterized in that: When adjusting the sampling frequency according to the change of pollutant concentration at different times, it includes: Calculate the average value of the pollutant concentration of all sampling points at the same time, and after a preset time interval, calculate the average value of the pollutant concentration of all sampling points at the same time, and determine whether to adjust the sampling frequency according to the change value of the two average values; Setting a minimum change value, and if the change value is less than or equal to the minimum change value, determining not to adjust the sampling frequency; If the change value is greater than the minimum change value, it is determined that the sampling frequency is adjusted, and a first change value and a second change value are set, and the first change value is less than the second change value; If the change value is less than the first change value, adjusting the sampling frequency by a first adjustment coefficient; If the change value is greater than or equal to the first change value and less than or equal to the second change value, adjusting the sampling frequency by a second adjustment coefficient; If the change value is greater than the second change value, adjusting the sampling frequency by a third adjustment coefficient; Among them, 1<first adjustment coefficient<second adjustment coefficient<third adjustment coefficient<2.

10. A discharge outlet tracing system based on water quality monitoring, used for applying the discharge outlet tracing method based on water quality monitoring as described in any one of claims 1 to 9, characterized in that: include: A region division module is used to divide the water area to be detected into an upstream area, a midstream area and a downstream area according to the flow direction, collect water quality monitoring data of the upstream area, the midstream area and the downstream area respectively, and take the area where the water quality monitoring data is abnormal as the first discharge area; An area determination module, used to take the upstream waters of the first discharge area as the second discharge area, set a number of sampling points in the first discharge area and the second discharge area, and determine the final discharge area according to the water quality monitoring data of each of the sampling points in the first discharge area and the second discharge area; A parameter determination module, used to determine the sampling point spacing and sampling frequency according to the water body parameters of the final discharge area, adjust the sampling point spacing in combination with environmental parameters, and adjust the sampling frequency according to the changes in pollutant concentration at different times; The discharge port determination module is used to generate a pollutant concentration change curve along the water flow direction according to the water quality monitoring data of the final adjusted sampling point, obtain the pollutant diffusion path, and determine the specific location of the discharge port.

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