River pollution traceability analysis method and device

Abstract

The invention discloses a riverway pollution traceability analysis method and device. The method comprises the steps of discharge port water quality monitoring, water quality monitoring data warning, pipe network traceability analysis, main pipe network pollution discharge pipe point analysis and pollution discharge enterprise accurate analysis. According to the invention, real-time monitoring data and a traceability analysis model are utilized, pipe network traceability can be rapidly and accurately carried out, and a pollution source enterprise is further accurately positioned through a space analysis technology and a comparative analysis method, so that decision support is provided for non-environmental protection and water quality management, compliant emission of the enterprise can be promoted, and river water quality pollution is reduced. The river ecological environment is improved.

Description

Technical Field

[0001] The present invention relates to river pollution treatment technology, and in particular to a method and device for analyzing the source of river pollution. Background Art

[0002] At present, the discharge of industrial and domestic sewage is increasing day by day, resulting in increasingly serious deterioration of river water quality. In order to ensure water quality safety, it is necessary to monitor the river water quality in real time, and trace the pollution source in time when abnormal situations are found, and take corresponding treatment measures. Traditional water quality monitoring methods mainly rely on manual sampling and laboratory analysis, which have problems such as long monitoring period, high cost, and poor timeliness. In recent years, with the development of sensor technology and Internet of Things technology, water quality online monitoring technology has gradually been applied. However, most of the existing water quality online monitoring systems only have simple data collection and alarm functions, lacking intelligent pollution source tracing functions. Therefore, there is an urgent need for a method that can monitor water quality in real time, quickly trace the pollution source, and effectively manage the drainage of enterprises. Summary of the Invention

[0003] The main object of the present invention is to provide a method and device for analyzing the source of river pollution, realizing real-time monitoring, intelligent analysis and rapid tracing of river pollution sources, so as to support the efficient development of water environmental pollution control work.

[0004] The technical solution adopted by the present invention is as follows:

[0005] According to one aspect of the present invention, a method for analyzing the source of river pollution is provided, including:

[0006] Monitoring the water quality at the outfall, laying high-precision water quality sensors at important outfalls, and real-time monitoring of water quality parameters, including dissolved oxygen, biochemical oxygen demand, chemical oxygen demand, ammonia nitrogen, total phosphorus, total organic carbon, pH value, heavy metal concentration; the monitoring data is uploaded to the data center through wireless transmission to ensure the timeliness and accuracy of the data; it mainly includes water quality sensor laying, pretreatment of water quality monitoring data, data transmission and data management;

[0007] Alarm for water quality monitoring data, the data center presets an alarm judgment logic, sets thresholds according to the historical data of water quality parameters, environmental protection standards and local policies, when a certain monitoring data exceeds the preset threshold, the data center will automatically trigger an alarm mechanism, generating alarm information including abnormal water quality parameters, concentrations, and outfall locations;

[0008] Pipe network traceability analysis: After an alarm is generated, pipe network traceability analysis will be carried out. First, detailed information including the pipe network layout and location will be collected, and the traceability starting point, direction, and end conditions will be determined. Then, starting from the starting point, the pipelines will be traversed according to the traceability direction, and the information of the subordinate pipelines will be added to the result set level by level, continuously updating the starting point until the traceability end conditions are met. Finally, the traceability result set, including the information of each level of pipelines and pipe points, will be output.

[0009] Analysis of sewage pipe points in the main pipe network: Samples will be taken at the pipe points in the upper, middle, and lower reaches of the main pipe network to monitor water quality parameters, concentrations, and flow rates. The water quality parameter concentration simulation formula will be used to predict the water quality parameter concentrations in the downstream, and the predicted concentrations will be compared with the measured concentrations. The loop determination will be carried out until all sewage pipe points are accurately located. Finally, the set of geophysical exploration point numbers of all sewage pipe points will be output to complete the determination of sewage pipe points in the main pipe network.

[0010] Precise analysis of polluting enterprises: The enterprise information database will be called to obtain the spatial location information of surrounding polluting enterprises. Buffer analysis will be carried out on the subordinate pipe networks connected to the sewage pipe points, and the spatial overlay algorithm will be used to determine the suspected polluting enterprises around the pipe network. The drainage permit information of enterprises and the water quality monitoring data of the discharge outlets will be cleaned and formatted to ensure the consistency and accuracy between different data. Subsequently, through the comparison and analysis of the types and concentrations of water quality parameters, the enterprises with illegal discharges will be accurately located, and the information including the enterprise name, types of water quality parameters with illegal discharges, and concentration information will be output, providing strong support for environmental protection supervision and law enforcement.

[0011] Furthermore, the water quality monitoring at the discharge outlets includes:

[0012] Laying of water quality sensors: High-precision water quality sensors will be laid at important discharge outlets. Each water quality sensor can monitor at least one water quality parameter in real time, including dissolved oxygen, biochemical oxygen demand, chemical oxygen demand, ammonia nitrogen, total phosphorus, total organic carbon, pH value, and heavy metal concentration.

[0013] Preprocessing of water quality monitoring data: The water quality data collected by the water quality sensors will be preprocessed, including data verification and outlier removal, to improve the reliability of the data.

[0014] Data transmission: The preprocessed data will be transmitted to the data center using wireless communication technology. Encryption technology will be used during the transmission process to ensure the security of data transmission.

[0015] Data management: The data center will receive and store the water quality monitoring data of the monitoring points, and establish a water quality monitoring database to uniformly manage and store the water quality monitoring data.

[0016] Even further, the water quality monitoring data alarm includes:

[0017] Alarm rule setting: according to the historical data of water quality parameters, environmental protection standards and local policies, set alarm thresholds and generate alarm rules. The alarm rules include alarm thresholds for concentrations of multiple key water quality parameters, including dissolved oxygen, biochemical oxygen demand, chemical oxygen demand, ammonia nitrogen, total phosphorus, total organic carbon, pH value, and heavy metal concentration;

[0018] Alarm judgment and triggering: The data center presets the alarm judgment logic and judges the received water quality parameters according to the preset alarm rules. When the concentration of a water quality parameter exceeds the alarm threshold, the alarm mechanism is triggered;

[0019] Generate and send alarm information, including abnormal water quality parameters, concentration and outlet location, and automatically trigger pipeline network tracing analysis.

[0020] Furthermore, the pipeline network traceability analysis includes:

[0021] Acquisition and processing of pipeline network traceability information, collection and analysis of pipeline network data and traceability parameters, and determination of the traceability starting point, laying the foundation for subsequent pipeline network traceability;

[0022] Pipeline network tracing starts from the tracing starting point and traverses the connected pipelines according to the tracing direction. Every time a lower-level pipeline connected to the current pipeline is found, the starting geophysical point number is updated and its information is added to the result set until all connected pipelines are traversed. Then the starting point is updated to the starting point of the lower-level pipeline and the tracing continues. At the same time, it is determined whether the end condition is met. If it is met, the result set is output. If not, the above steps are repeated.

[0023] Output the traceability results. After completing the traceability of all lower-level pipeline networks, you can stop the pipeline network tracing and output the traceability result set, including pipelines and points at all levels.

[0024] Furthermore, the main pipe network sewage pipe point analysis includes:

[0025] Water quality sampling of the main pipeline network: a certain number of water quality samples are taken at the upstream, midstream and downstream points of the main pipeline network, including water quality parameters, water quality concentration and flow rate;

[0026] Analysis of sewage pipe points in the trunk pipe network: The sampling pipe points at the farthest upstream where the water quality parameter concentration exceeds the standard are identified as sewage pipe points; the downstream pipe points are cyclically identified based on the simulation data and the measured data of the sampling points until they are accurately located at the sewage pipe points.

[0027] Furthermore, the main pipe network sewage pipe point analysis includes:

[0028] The downstream pipe point water quality parameter concentration simulation uses the upstream measured water quality parameter concentration to simulate the downstream water quality parameter concentration as the basis for determining whether the downstream pipe point is a sewage pipe point. The calculation formula for the downstream pipe point water quality parameter concentration simulation is as follows:

[0029]

[0030] Wherein:

[0031] M ij is the simulated concentration of the i-th water quality parameter at the downstream sampling pipe point j;

[0032] M ij-1 is the measured concentration of the i-th water quality parameter at the upstream sampling pipe point adjacent to the pipe point j;

[0033] K is the comprehensive attenuation coefficient of the water quality parameter;

[0034] x is the distance between the two pipe points;

[0035] u is the average flow velocity of the water flow in the pipeline;

[0036] For the determination of the sewage discharge pipe point, the main pipe point where the water quality parameter concentration is detected to exceed the standard at the most upstream is determined as the sewage discharge pipe point. After the determination is completed, the downstream sewage discharge pipe points are determined according to the simulated water quality parameter concentration and the measured water quality parameter concentration. If the measured water quality parameter concentration at the downstream sampling pipe point is less than the simulated concentration, it means that there is no sewage discharge pipe point between the two sampling pipe points; if the measured water quality parameter concentration at the downstream sampling pipe point is greater than the simulated water quality parameter concentration, it is necessary to further sample in the middle of the two sampling pipe points, and conduct the simulation of the water quality parameter concentration and the loop determination based on the data of the sampling pipe points until all the sewage discharge pipe points are determined; the judgment formula for whether there is a sewage discharge pipe point between the two sampling pipe points:

[0037]

[0038] Wherein:

[0039] represents the measured concentration of the i-th water quality parameter at the j-th sampling pipe point;

[0040] M ij represents the simulated concentration of the i-th water quality parameter at the j-th sampling pipe point;

[0041] Output of the sewage discharge pipe point set. After all the sewage discharge pipe points are determined, the set of geophysical prospecting point numbers of the sewage discharge pipe points will be output: P = {P1, P2,..., P n}.

[0042] Furthermore, the precise analysis of the sewage discharge enterprises includes:

[0043] Determination of the information of suspected sewage discharge enterprises. By calling the enterprise information database, the spatial location information of the surrounding sewage discharge enterprises is obtained. Subsequently, buffer analysis is carried out on the lower-level pipe network of the sewage discharge pipe point, and the analysis results are superimposed with the location information of the sewage discharge enterprises by using the spatial overlay analysis algorithm to determine the possible suspected sewage discharge enterprises around the pipe network;

[0044] Data preprocessing, which performs data cleaning and data formatting on the enterprise sewage discharge permit information and the sewage outlet water quality monitoring data, ensures the consistency and accuracy of the sewage outlet water quality monitoring information and the sewage discharge permit information, and provides support for subsequent comparative analysis;

[0045] Through the comparison of the types of water quality parameters and the comparison of the concentrations of water quality parameters, the precise supervision of the enterprise's sewage discharge behavior is realized. By obtaining the enterprise's sewage discharge information and the sewage outlet water quality monitoring data, the types of water quality parameters in the enterprise's sewage discharge permit and the information of the excessive water quality parameters in the sewage outlet water quality monitoring data are extracted and compared. If there are consistent types of water quality parameters, the discharge concentration limit of the water quality parameters in the sewage discharge permit and the excessive concentration value in the water quality monitoring results are further obtained for comparison, so as to accurately locate the polluting enterprises and provide support for environmental protection supervision and law enforcement;

[0046] Output of the comparison analysis results. After determining the information of the polluting enterprises, the sewage discharge results can be output. The output content includes the name of the polluting enterprise, the types and concentrations of the illegally discharged water quality parameters, and the information of the exceeding multiple, providing strong support for subsequent environmental protection law enforcement and handling.

[0047] According to another aspect of the present invention, a device for river pollution source tracing and analysis is provided, including:

[0048] Sewage outlet water quality monitoring module, which is used to lay high-precision water quality sensors at important sewage outlets to monitor water quality parameters in real time, including dissolved oxygen, biochemical oxygen demand, chemical oxygen demand, ammonia nitrogen, total phosphorus, total organic carbon, pH value, heavy metal concentration; the monitoring data is uploaded to the data center through wireless transmission to ensure the timeliness and accuracy of the data; it mainly includes water quality sensor laying, sewage outlet water quality monitoring data preprocessing, data transmission and data management;

[0049] Water quality monitoring data alarm module, which is used to preset alarm judgment logic in the data center, set thresholds according to the historical data of water quality parameters, environmental protection standards and local policies. When a certain monitoring data exceeds the preset threshold, the data center will automatically trigger the alarm mechanism to generate alarm information including abnormal water quality parameters, concentrations, and sewage outlet positions;

[0050] Pipe network source tracing analysis module, which is used to perform pipe network source tracing analysis after the alarm is generated. First, it collects detailed information including the pipe network layout, location, etc., and determines the source tracing starting point, direction and ending conditions; then starting from the starting point, it traverses the pipeline according to the source tracing direction, adds the information of the lower-level pipelines to the result set level by level, and continuously updates the starting point until the source tracing ending conditions are met. Finally, it outputs the source tracing result set, including the information of each level of pipelines and pipe points;

[0051] The main pipeline network sewage pipe point analysis module is used to sample and monitor water quality parameters, concentrations, and flow velocities at the upstream, midstream, and downstream pipe points of the main pipeline network. It uses the water quality parameter concentration simulation formula to predict the downstream water quality parameter concentrations, compares the predicted concentrations with the measured concentrations, and loops to determine until all sewage pipe points are accurately located. Finally, it outputs the set of geophysical exploration point numbers of all sewage pipe points to complete the determination of sewage pipe points in the main pipeline network;

[0052] The precise analysis module for sewage enterprises is used to call the enterprise information database to obtain the spatial location information of surrounding sewage enterprises, perform buffer analysis on the lower-level pipe networks connected to the sewage pipe points, and use the spatial overlay algorithm to determine the suspected sewage enterprises around the pipe network; clean and format the enterprise drainage permit information and outlet water quality monitoring data to ensure the consistency and accuracy between different data; then, through the comparison and analysis of the types and concentrations of water quality parameters, accurately locate the enterprises with illegal emissions, and output information including the enterprise name, types and concentration information of illegally discharged water quality parameters, providing strong support for environmental protection supervision and law enforcement.

[0053] Advantages of the present invention:

[0054] The present invention utilizes real-time monitoring data and a traceability analysis model to quickly and accurately conduct pipeline network traceability. Through spatial analysis technology and comparison analysis methods, it further precisely locates the polluting source enterprises, thereby providing decision-making support for environmental protection and water quality management, promoting the compliance emissions of enterprises, reducing river water pollution, and improving the river ecological environment.

[0055] In addition to the purposes, features, and advantages described above, the present invention has other purposes, features, and advantages. The following will refer to the drawings for a further detailed description of the present invention. Brief Description of the Drawings

[0056] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0057] Figure 1 is the block diagram of the river pollution traceability analysis method of the present invention;

[0058] Figure 2 is the block diagram of obtaining and processing pipeline network traceability information of the present invention;

[0059] Figure 3 is the block diagram of pipeline network traceability of the present invention;

[0060] Figure 4 is the block diagram of the main pipeline network sewage pipe point analysis of the present invention;

[0061] Figure 5 is the block diagram of determining information of suspected sewage enterprises of the present invention;

[0062] Figure 6 is the data preprocessing block diagram of the present invention;

[0063] Figure 7 is the data comparison and analysis block diagram of the present invention. Detailed implementation manners

[0064] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present 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 only used to explain the present invention and are not used to limit the present invention.

[0065] Referring to Figures 1 to 7 , the present invention provides a method for river pollution source tracing and analysis, including steps of outlet water quality monitoring, water quality over-standard warning, pipe network tracing and analysis, main pipe network sewage discharge pipe point tracing, and precise analysis of sewage discharging enterprises. Among them: The outlet water quality monitoring mainly conducts real-time monitoring and management of the water quality data of important outlets, providing data support for the precise analysis of subsequent sewage discharging enterprises; The water quality over-standard warning can effectively monitor the water quality by setting water quality monitoring thresholds, and issue timely warnings when water quality exceeds the standard; The pipe network tracing and analysis uses a pipe network tracing and analysis model to achieve precise tracing of the overall layout and water flow dynamics of the pipe network system, providing support for tracing sewage discharging enterprises; The analysis of main pipe network sewage discharge pipe points uses the results of pipe network tracing and the results of water quality sampling at main pipe network pipe points, and gradually cycles based on the water quality parameter concentration simulation and comparison method to precisely screen the main pipe network sewage discharge pipe points; The precise analysis of sewage discharging enterprises is to conduct comparison and analysis by comparing the enterprise sewage discharge permit information and the outlet water quality monitoring data, and finally accurately locate the illegal sewage discharging enterprises, providing effective data support for river water pollution control and enterprise sewage discharge management.

[0066] Outlet water quality monitoring: High-precision water quality sensors are installed at important outlets to monitor water quality parameters in real time, including dissolved oxygen, biochemical oxygen demand, chemical oxygen demand, ammonia nitrogen, total phosphorus, total organic carbon, pH value, and heavy metal concentration. The monitoring data is uploaded to the data center through wireless transmission to ensure the timeliness and accuracy of the data. It mainly includes: installation of water quality sensors, preprocessing of water quality monitoring data, data transmission, and data management.

[0067] Installation of water quality sensors: High-precision water quality sensors are installed at important outlets, and each water quality sensor can monitor at least one water quality parameter in real time, including dissolved oxygen, biochemical oxygen demand, chemical oxygen demand, ammonia nitrogen, total phosphorus, total organic carbon, pH value, and heavy metal concentration.

[0068] Preprocessing of water quality monitoring data: The water quality data collected by water quality sensors is preprocessed, including data verification and outlier rejection, to improve the reliability of the data.

[0069] Data verification: Conduct missing value checks, rationality verification, consistency checks, and timeliness confirmation on water quality monitoring data to ensure the integrity and reliability of water quality data.

[0070] Abnormal data elimination: Use statistical methods, visualization chart methods, and physical analysis methods to identify and eliminate significantly different data points to ensure the accuracy of the data.

[0071] Data transmission: Adopt wireless communication technology to transmit the preprocessed data to the data center, and use encryption technology during the transmission process to ensure the security of data transmission.

[0072] Data management: The data center receives and stores the water quality monitoring data of the monitoring points, and establishes a water quality monitoring database to uniformly manage and store the water quality monitoring data.

[0073] Water quality monitoring data alarm: The data center presets an alarm judgment logic, sets thresholds according to the historical data of water quality parameters, environmental protection standards, and local policies. When a certain monitoring data exceeds the preset threshold, the data center will automatically trigger the alarm mechanism and generate alarm information including abnormal water quality parameters, concentrations, and outfall positions.

[0074] Alarm rule setting: Set alarm thresholds according to the historical data of water quality parameters, environmental protection standards, and local policies to generate alarm rules. The alarm rules include alarm thresholds for concentrations of various key water quality parameters such as dissolved oxygen, biochemical oxygen demand, chemical oxygen demand, ammonia nitrogen, total phosphorus, total organic carbon, pH value, and heavy metal concentrations.

[0075] Alarm judgment and triggering: The data center presets an alarm judgment logic, judges the received water quality parameters according to the preset alarm rules. When the concentration of a certain water quality parameter exceeds the alarm threshold, the alarm mechanism will be triggered.

[0076] Alarm information generation and sending: Generate alarm information including abnormal water quality parameters, concentrations, and outfall positions, and automatically trigger a pipe network traceability analysis.

[0077] Pipe network traceability analysis: After the alarm is generated, a pipe network traceability analysis will be carried out. First, collect detailed information including the pipe network layout, location, etc., and determine the traceability starting point, direction, and end conditions; then start from the starting point, traverse the pipelines according to the traceability direction, add the information of the lower-level pipelines to the result set level by level, and continuously update the starting point until the traceability end conditions are met. Finally, output the traceability result set, including the information of each level of pipelines and pipe points.

[0078] Obtaining and processing of pipe network traceability information: Collect and analyze pipe network data (including layout, location, and material information) and traceability parameters (starting point, direction, end conditions), and determine the traceability starting point to lay the foundation for subsequent pipe network traceability.

[0079] Obtaining pipeline network information and tracing parameters: Collect and input existing pipeline network information, including the pipeline network's orientation and location information; collect and input tracing parameters, including the starting geophysical exploration point number for tracing, the tracing direction, and the determination condition for the end of tracing (traversing all pipelines and reaching the preset tracing depth).

[0080] Parsing pipeline network information: Parse the obtained pipeline network information to extract the detailed information of all pipelines, including pipeline orientation, geophysical exploration point number, connection relationship, and flow direction information.

[0081] Determining the starting point of tracing: Based on the starting geophysical exploration point number for tracing, find the corresponding starting point in the parsed pipeline network information and conduct pipeline network tracing.

[0082] Pipeline network tracing: Starting from the starting point of tracing, traverse the connected pipelines according to the tracing direction. Each time a lower-level pipeline connected to the current pipeline is found, update the starting geophysical exploration point number and add its information to the result set until all connected pipelines are traversed; then update the starting point to the starting point of the lower-level pipeline and continue tracing. At the same time, judge whether the end condition is met. If it is satisfied, output the result set; if not, repeat the above steps.

[0083] Pipeline tracing: Starting from the starting point of tracing, traverse the pipelines connected to the starting tracing point according to the tracing direction. If a lower-level pipeline connected to the current pipeline is found, update the starting geophysical exploration point number and further conduct tracing; if no lower-level pipeline connected to the current pipeline is found, the step of judging whether tracing ends can be carried out.

[0084] Adding information of lower-level pipelines to the result set: After finding the lower-level pipeline, the information of the lower-level pipeline needs to be added to the result set. The pipeline information includes information such as the detailed information of the pipeline, the geophysical exploration point number, and the pipeline connection relationship. During the pipeline network tracing process, the result set will continuously add the traced pipeline and pipe point information until the tracing ends.

[0085] Updating the starting point of tracing: When the tracing of the upper-level pipeline ends, update the starting geophysical exploration point number to the starting geophysical exploration point number of this lower-level pipeline, and then conduct the pipeline tracing step until the end condition is met.

[0086] Judging the end of tracing: Check whether the updated starting geophysical exploration point number meets the determination condition for the end of tracing. If the determination condition is met, the result set can be directly output; if the end condition is not met, return to the pipeline tracing step.

[0087] Outputting the tracing result: After completing the tracing of all lower-level pipeline networks, the pipeline network tracing can be stopped, and the tracing result set is output, including pipelines and pipe points at all levels.

[0088] Analysis of sewage pipe points in the main pipeline network: Sampling and monitoring water quality parameters, concentrations, and flow velocities at the pipe points in the upper, middle, and lower reaches of the main pipeline network. Using the water quality parameter concentration simulation formula to predict the water quality parameter concentrations in the lower reaches, and comparing the predicted concentrations with the measured concentrations. Repeatedly judge until all sewage pipe points are accurately located. Finally, output the set of geophysical exploration point numbers of all sewage pipe points to complete the determination of sewage pipe points in the main pipeline network.

[0089] Water quality sampling in the main pipeline network: Take a certain number of water quality samples at the pipe points in the upper, middle, and lower reaches of the main pipeline network, including water quality parameters, water quality concentrations, flow velocities, etc.

[0090] Analysis of sewage pipe points in the main pipeline network: Determine the sampling pipe point with excessive water quality parameter concentration in the uppermost reaches as the sewage pipe point; for the pipe points in the lower reaches, conduct repeated judgments based on the simulation data and the measured data at the sampling points until the sewage pipe points are accurately located.

[0091] Simulation of water quality parameter concentrations at downstream pipe points: Use the measured water quality parameter concentrations in the uppermost reaches to simulate the water quality parameter concentrations in the lower reaches, which serves as the basis for determining whether the downstream pipe points are sewage pipe points. The calculation formula for simulating the water quality parameter concentrations at downstream pipe points is as follows:

[0092]

[0093] Where:

[0094] M ij Is the simulated concentration of the i-th water quality parameter at the downstream sampling pipe point j;

[0095] M ij-1 Is the measured concentration of the i-th water quality parameter at the sampling pipe point adjacent to the upstream of pipe point j;

[0096] K is the comprehensive attenuation coefficient of the water quality parameter;

[0097] x is the distance between the two pipe points;

[0098] u is the average flow velocity of the water in the pipeline.

[0099] Determination of sewage pipe points: Determine the main pipeline point with excessive water quality parameter concentration detected in the uppermost reaches as the sewage pipe point. After the determination, determine the downstream sewage pipe points based on the simulated water quality parameter concentrations and the measured water quality parameter concentrations. If the measured water quality parameter concentration at the downstream sampling pipe point is less than the simulated concentration, it means there is no sewage pipe point between the two sampling pipe points; if the measured water quality parameter concentration at the downstream sampling pipe point is greater than the simulated water quality parameter concentration, it is necessary to further sample in the middle of the two sampling pipe points, and conduct water quality parameter concentration simulation and repeated judgment based on the data of the sampling pipe points until all sewage pipe points are determined. The judgment formula for whether there is a sewage pipe point between the two sampling pipe points:

[0100]

[0101] Wherein:

[0102] represents the measured concentration of the i-th water quality parameter at the j-th sampling pipe point;

[0103] M ij represents the simulated concentration of the i-th water quality parameter at the j-th sampling pipe point.

[0104] Output of the sewage discharge pipe point set: After all sewage discharge pipe points are determined, the geophysical exploration point numbers set of the sewage discharge pipe points will be output: P = {P1, P2, …, P n}

[0105] Precise analysis of sewage discharge enterprises: First, call the enterprise information database to obtain the spatial location information of surrounding sewage discharge enterprises, then conduct buffer analysis on the lower-level pipe networks connected to the sewage discharge pipe points, and use the spatial overlay algorithm to determine the suspected sewage discharge enterprises around the pipe networks; then clean and format the enterprise sewage discharge permit information and the water quality monitoring data of the discharge outlets to ensure the consistency and accuracy between different data; subsequently, through the comparison and analysis of the types and concentrations of water quality parameters, accurately locate the enterprises with illegal discharges, and output information including the enterprise name, types and concentration information of the illegally discharged water quality parameters, providing strong support for environmental protection supervision and law enforcement.

[0106] Determination of suspected sewage discharge enterprise information: Call the enterprise information database to obtain the spatial location information of surrounding sewage discharge enterprises, then conduct buffer analysis on the lower-level pipe networks of the sewage discharge pipe points, and use the spatial overlay analysis algorithm to overlay the analysis results with the location information of the sewage discharge enterprises to determine the possible suspected sewage discharge enterprises around the pipe networks.

[0107] Obtaining sewage discharge enterprise information: Call the enterprise information database to obtain the spatial location information of surrounding sewage discharge enterprises.

[0108] Buffer analysis of pipe networks: According to the tracing result set and the analysis results of the main pipe network sewage discharge pipe points, conduct buffer analysis on the lower-level pipe networks connected to the sewage discharge pipe points, and output the buffer analysis results.

[0109] Determination of suspected sewage discharge enterprises: Use the spatial overlay algorithm to conduct spatial overlay analysis on the buffer analysis results and the spatial location information of the sewage discharge enterprises, so as to determine the suspected sewage discharge enterprises around the pipe networks.

[0110] Data preprocessing: Clean and format the enterprise sewage discharge permit information and the water quality monitoring data of the discharge outlets to ensure the consistency and accuracy of the water quality monitoring information at the discharge outlets and the sewage discharge permit information, providing support for subsequent comparative analysis.

[0111] Data cleaning: Clean the data in the drainage permit certificate that is irrelevant to the monitoring of the water quality at the drainage outlet, including the specific house number in the enterprise address in the drainage permit certificate information and the information of the monitoring personnel in the water quality monitoring data at the drainage outlet, and perform deletion and merging processing to ensure the uniqueness of the data.

[0112] Data formatting conversion: Perform unified data format conversion on the enterprise drainage permit certificate information and the water quality monitoring data at the drainage outlet, convert different data into a unified text and numerical format, and at the same time, standardize the data in different formats to ensure the consistency of the data format.

[0113] Through the comparison of the types of water quality parameters and the comparison of the concentrations of water quality parameters, precise supervision of the enterprise's drainage behavior is realized. By obtaining the enterprise's drainage information and the water quality monitoring data at the drainage outlet, extract the types of water quality parameters in the enterprise's drainage permit certificate and the information of the exceeded water quality parameters in the water quality monitoring data at the drainage outlet and conduct a comparison. If there are consistent types of water quality parameters, further obtain the emission concentration limit of the water quality parameters in the drainage permit and the exceeded concentration value in the water quality monitoring results for comparison, so as to accurately locate the polluting enterprise and provide support for environmental protection supervision and law enforcement.

[0114] Comparison and analysis of water quality parameter types: Extract the types of discharged water quality parameters in the enterprise's drainage permit certificate and the types of water quality parameters in the water quality monitoring data at the drainage outlet, and perform text matching on the extracted information. If there are consistent types of water quality parameters in the comparison, determine that the enterprise is a potential illegal discharging enterprise and further conduct a comparison of the water quality parameter concentrations; if there are no consistent types of water quality parameters in the comparison, determine that the enterprise is a non-potential illegal discharging enterprise and end the comparison process.

[0115] Comparison and analysis of water quality parameter concentrations: For the consistent types of water quality parameters, extract the concentration limit specified in the enterprise's drainage permit certificate and the exceeded concentration value detected at the drainage outlet. If the exceeded concentration value exceeds the concentration limit, determine that the enterprise has an illegal discharging behavior; if the exceeded concentration value does not exceed the concentration limit, determine that the enterprise does not have an illegal discharging behavior.

[0116] Output of comparison and analysis results: After determining the information of the polluting enterprise, the discharging results can be output. The output content includes the name of the polluting enterprise, the types and concentrations of the illegally discharged water quality parameters, and the information of the exceeded multiple, providing strong support for subsequent environmental protection law enforcement and handling.

[0117] The present invention focuses on real-time monitoring and warning of the water quality at key drainage outlets, can monitor the water quality status of key drainage outlets in real time, discover pollution in time, give warnings and conduct source tracing to avoid water environmental pollution.

[0118] Pipe network traceability analysis: Starting from the warning drainage outlet, use topological analysis technology to analyze the upstream pipe networks and pipe points at all levels corresponding to the drainage outlet, providing basic data support for tracing the polluting enterprise.

[0119] Analysis of sewage pipe points in the main pipeline network. Based on the water quality sampling data of the main pipeline network, using the simulation of water quality parameter concentration at pipe points and the judgment rules for sewage pipe points, and gradually cycling, finally accurately screen out the sewage pipe points in the main pipeline network upstream of the warning outlet.

[0120] Accurate analysis of polluting enterprises. Integrate the results of pipeline network traceability and the analysis results of main sewage pipe points, use spatial analysis technology to locate suspected polluting enterprises, and further conduct comparison and analysis based on the sewage discharge permit certificate and the analysis results of the water quality at the outlet, and finally accurately analyze polluting enterprises.

[0121] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for tracing the source of river pollution, characterized in that: include: Outlet water quality monitoring: high-precision water quality sensors are installed at important outlets to monitor water quality parameters in real time, including dissolved oxygen, biochemical oxygen demand, chemical oxygen demand, ammonia nitrogen, total phosphorus, total organic carbon, pH value, and heavy metal concentration. The monitoring data is uploaded to the data center via wireless transmission to ensure the timeliness and accuracy of the data. It mainly includes the installation of water quality sensors, preprocessing of water quality monitoring data, data transmission, and data management. Water quality monitoring data alarm: The data center presets alarm judgment logic and sets thresholds based on historical data of water quality parameters, environmental protection standards and local policies. When a certain monitoring data exceeds the preset threshold, the data center will automatically trigger the alarm mechanism and generate alarm information including abnormal water quality parameters, concentration and outlet location. Pipeline network source tracing analysis: After an alarm is generated, a pipeline network source tracing analysis will be conducted. First, detailed information including the direction and location of the pipeline network will be collected, and the starting point, direction and end conditions of the source tracing will be determined; Then, starting from the starting point, the pipeline is traversed according to the tracing direction, and the lower-level pipeline information is added to the result set step by step. The starting point is continuously updated until the tracing end condition is met, and finally the tracing result set is output, including the pipeline and pipe point information at each level; Analysis of sewage pipe points in the trunk network: sampling and monitoring of water quality parameters, concentration and flow rate at pipe points in the middle, middle and downstream of the trunk network, using the water quality parameter concentration simulation formula to predict the concentration of downstream water quality parameters, and compare the predicted concentration with the measured concentration, and repeat the determination until all sewage pipe points are accurately located, and finally output the geophysical point number set of all sewage pipe points to complete the determination of sewage pipe points in the trunk network; Accurately analyze polluting enterprises, call the enterprise information database to obtain the spatial location information of surrounding polluting enterprises, conduct buffer zone analysis on the lower-level pipeline network connected to the sewage pipe point, and use the spatial overlay algorithm to determine the suspected polluting enterprises around the pipeline network; clean and format the enterprise drainage license information and outlet water quality monitoring data to ensure consistency and accuracy between different data; then accurately locate the illegal discharge enterprises through comparative analysis of water quality parameter types and concentrations, and output information including enterprise name, illegal discharge water quality parameter types and concentrations, to provide strong support for environmental protection supervision and law enforcement.

2. The method for tracing the source of river pollution according to claim 1 is characterized in that: The outlet water quality monitoring includes: Water quality sensor installation: high-precision water quality sensors are installed at important outlets. Each water quality sensor can monitor at least one water quality parameter in real time, including dissolved oxygen, biochemical oxygen demand, chemical oxygen demand, ammonia nitrogen, total phosphorus, total organic carbon, pH value, and heavy metal concentration; Water quality monitoring data preprocessing: preprocessing the water quality data collected by the water quality sensor, including data verification and outlier removal, to improve data reliability; Data transmission: wireless communication technology is used to transmit pre-processed data to the data center, and encryption technology is used during the transmission process to ensure the security of data transmission; Data management: The data center receives and stores water quality monitoring data from monitoring points, and establishes a water quality monitoring database to uniformly manage and store water quality monitoring data.

3. The method for tracing the source of river pollution according to claim 1 is characterized in that: The water quality monitoring data alarm includes: Alarm rule setting: according to the historical data of water quality parameters, environmental protection standards and local policies, set alarm thresholds and generate alarm rules. The alarm rules include alarm thresholds for concentrations of multiple key water quality parameters, including dissolved oxygen, biochemical oxygen demand, chemical oxygen demand, ammonia nitrogen, total phosphorus, total organic carbon, pH value, and heavy metal concentration; Alarm judgment and triggering: The data center presets the alarm judgment logic and judges the received water quality parameters according to the preset alarm rules. When the concentration of a water quality parameter exceeds the alarm threshold, the alarm mechanism is triggered; Generate and send alarm information, including abnormal water quality parameters, concentration and outlet location, and automatically trigger pipeline network tracing analysis.

4. The method for tracing the source of river pollution according to claim 1 is characterized in that: The pipeline network traceability analysis includes: Acquisition and processing of pipeline network traceability information, collection and analysis of pipeline network data and traceability parameters, and determination of the traceability starting point, laying the foundation for subsequent pipeline network traceability; Pipeline network tracing starts from the tracing starting point and traverses the connected pipelines according to the tracing direction. Every time a lower-level pipeline connected to the current pipeline is found, the starting geophysical point number is updated and its information is added to the result set until all connected pipelines are traversed. Then the starting point is updated to the starting point of the lower-level pipeline and the tracing continues. At the same time, it is determined whether the end condition is met. If it is met, the result set is output. If not, the above steps are repeated. Output the traceability results. After completing the traceability of all lower-level pipeline networks, you can stop the pipeline network tracing and output the traceability result set, including pipelines and points at all levels.

5. The method for tracing the source of river pollution according to claim 1 is characterized in that: The main pipeline network sewage pipe point analysis includes: Water quality sampling of the main pipeline network: a certain number of water quality samples are taken at the upstream, midstream and downstream points of the main pipeline network, including water quality parameters, water quality concentration and flow rate; Analysis of sewage pipe points in the trunk pipe network: The sampling pipe points at the farthest upstream where the water quality parameter concentration exceeds the standard are identified as sewage pipe points; the downstream pipe points are cyclically identified based on the simulation data and the measured data of the sampling points until they are accurately located at the sewage pipe points.

6. The method for tracing the source of river pollution according to claim 5 is characterized in that: The main pipeline network sewage pipe point analysis includes: The downstream pipe point water quality parameter concentration simulation uses the upstream measured water quality parameter concentration to simulate the downstream water quality parameter concentration as the basis for determining whether the downstream pipe point is a sewage pipe point. The calculation formula for the downstream pipe point water quality parameter concentration simulation is as follows: in: M ij is the simulated concentration of the i-th water quality parameter at point j of the downstream sampling pipe; M ij-1 is the measured concentration of the i-th water quality parameter at the upstream sampling point adjacent to the pipe point j; K is the comprehensive attenuation coefficient of water quality parameters; x is the distance between the two tube points; u is the average flow velocity of water in the pipe; The sewage pipe point is determined by judging the upstream main pipe point where the water quality parameter concentration exceeds the standard as the sewage pipe point. After the judgment is completed, the downstream sewage pipe point is determined according to the simulated water quality parameter concentration and the measured water quality parameter concentration. If the measured water quality parameter concentration of the downstream sampling pipe point is less than the simulated concentration, it means that there is no sewage pipe point between the two sampling pipe points; if the measured water quality parameter concentration of the downstream sampling pipe point is greater than the simulated water quality parameter concentration, it is necessary to further sample between the two sampling pipe points, and simulate the water quality parameter concentration and cyclically judge based on the sampling pipe point data until all sewage pipe points are judged; the judgment formula for whether there is a sewage pipe point between the two sampling pipe points is: in: represents the measured concentration of the i-th water quality parameter at the j-th sampling tube point; M ij represents the simulated concentration of the i-th water quality parameter at the j-th sampling pipe point; The sewage pipe point set output, after completing the determination of all sewage pipe points, the sewage pipe point geophysical point number set will be output: P = {P1, P2, ..., P n }.

7. The method for tracing the source of river pollution according to claim 1 is characterized in that: The precise analysis of pollutant-discharging enterprises includes: The information of suspected pollutant-discharging enterprises is determined by calling the enterprise information database to obtain the spatial location information of surrounding pollutant-discharging enterprises, and then a buffer zone analysis is performed on the downstream pipe network of the sewage discharge point. The analysis results are superimposed with the location information of the pollutant-discharging enterprises using the spatial overlay analysis algorithm to determine the suspected pollutant-discharging enterprises that may exist around the pipe network; Data preprocessing: cleaning and formatting the enterprise's drainage permit information and outlet water quality monitoring data to ensure the consistency and accuracy of the outlet water quality monitoring information and drainage permit information, and provide support for subsequent comparative analysis; Through the comparison of water quality parameter types and water quality parameter concentrations, accurate supervision of enterprise drainage behavior is achieved. By obtaining enterprise drainage information and outlet water quality monitoring data, the types of water quality parameters in the enterprise drainage permit and the information on excessive water quality parameters in the outlet water quality monitoring data are extracted and compared. If there are consistent types of water quality parameters, the discharge concentration limit of the water quality parameter in the drainage permit is further obtained and compared with the excessive concentration value in the water quality monitoring results, so as to accurately locate the polluting enterprise and provide support for environmental protection supervision and law enforcement; After the comparison and analysis results are output and the information of the polluting enterprise is determined, the pollution discharge results can be output. The output content includes the name of the polluting enterprise, the type and concentration of water quality parameters that have been illegally discharged, and the information on the multiples of exceeding the standard, providing strong support for subsequent environmental protection law enforcement and treatment.

8. A river pollution source tracing analysis device, characterized in that: include: Outlet water quality monitoring module is used to lay high-precision water quality sensors at important outlets to monitor water quality parameters in real time, including dissolved oxygen, biochemical oxygen demand, chemical oxygen demand, ammonia nitrogen, total phosphorus, total organic carbon, pH value, and heavy metal concentration; monitoring data is uploaded to the data center via wireless transmission to ensure the timeliness and accuracy of the data; it mainly includes water quality sensor laying, water quality monitoring data preprocessing, data transmission and data management; The water quality monitoring data alarm module is used for the data center to preset the alarm judgment logic and set the threshold according to the historical data of water quality parameters, environmental protection standards and local policies. When a certain monitoring data exceeds the preset threshold, the data center will automatically trigger the alarm mechanism and generate alarm information including abnormal water quality parameters, concentration and outlet location; The pipeline network traceability analysis module is used to conduct pipeline network traceability analysis after an alarm is generated. First, detailed information including the direction and location of the pipeline network is collected, and the traceability starting point, direction and end conditions are determined; Then, starting from the starting point, the pipeline is traversed according to the tracing direction, and the lower-level pipeline information is added to the result set step by step. The starting point is continuously updated until the tracing end condition is met, and finally the tracing result set is output, including the pipeline and pipe point information at each level; The main pipeline network sewage pipe point analysis module is used to sample and monitor water quality parameters, concentration and flow rate at the middle, middle and downstream pipe points on the main pipeline network, use the water quality parameter concentration simulation formula to predict the downstream water quality parameter concentration, and compare the predicted concentration with the measured concentration. The module will make a circular judgment until all sewage pipe points are accurately located, and finally output the geophysical point number set of all sewage pipe points to complete the judgment of the sewage pipe points of the main pipeline network; The precise analysis module for polluting enterprises is used to call the enterprise information database to obtain the spatial location information of surrounding polluting enterprises, conduct buffer zone analysis on the lower-level pipe network connected to the sewage pipe point, and use the spatial superposition algorithm to determine the suspected polluting enterprises around the pipe network; clean and format the enterprise drainage license information and outlet water quality monitoring data to ensure the consistency and accuracy between different data; then accurately locate the illegal discharge enterprises through comparative analysis of water quality parameter types and concentrations, and output information including the enterprise name, illegal discharge water quality parameter types and concentrations, to provide strong support for environmental protection supervision and law enforcement.

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