Pollution risk assessment method for groundwater environment and related device

Abstract

The invention discloses a pollution risk assessment method, a pollution risk assessment device, pollution risk assessment equipment and a computer readable storage medium for an underground water environment, and the method can accurately simulate the migration and diffusion of pollutants in underground water through a constructed underground water pollutant migration model. And calculating exposure by combining sensitive receptor distribution, calculating risk indexes and probabilities according to toxicological parameters, and finally determining risk levels. Through application of the series of models, the accuracy and scientificity of risk assessment are greatly improved, a reliable basis is provided for groundwater pollution prevention, control and treatment, and potential environmental risks are effectively reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of environmental monitoring, and more specifically, relates to a method for assessing the pollution risk of groundwater environment, a pollution risk assessment device, a pollution risk assessment equipment, and a computer-readable storage medium. Background Art

[0002] With the continuous acceleration of the industrialization process and the continuous improvement of the urbanization level, the problem of groundwater pollution has become increasingly serious and has become a global environmental challenge. As an important water resource, once groundwater is polluted, it is difficult to repair, has a long cycle, and is costly. Therefore, it is of great significance to scientifically and effectively assess the pollution risk of groundwater environment.

[0003] In related technologies, the methods for assessing the pollution risk of groundwater mainly fall into two categories: qualitative assessment and quantitative assessment. Traditional qualitative assessment methods such as the DRASTIC model and the GOD model mainly evaluate the vulnerability of groundwater based on natural factors such as geological conditions and hydrogeological parameters, and cannot accurately quantify the migration of pollutants and their health risks. While quantitative assessment methods such as the health risk assessment model can calculate the risk value of pollutants to human health, there are still many deficiencies in aspects such as data acquisition, pollutant migration simulation, and risk characterization.

[0004] Therefore, with the increasingly strict environmental supervision requirements, the traditional risk assessment method relying on manual experience judgment can no longer meet the development needs of precision, digitization, and intelligence. Especially in the fields of emergency disposal of sudden pollution events, evaluation of the redevelopment and utilization of polluted sites, and management of drinking water source protection areas, there is an urgent need for an efficient and accurate groundwater pollution risk assessment technology. Summary of the Invention

[0005] The purpose of this application is to provide a method for assessing the pollution risk of groundwater environment, a pollution risk assessment device, a pollution risk assessment equipment, and a computer-readable storage medium, so as to improve the effectiveness and accuracy of groundwater pollution risk assessment.

[0006] In view of the above defects or improvement requirements of the prior art, the present invention provides a method for assessing the pollution risk of groundwater environment, including:

[0007] The assessment device obtains the task information of the groundwater pollution risk assessment input by the user; wherein, the task information includes: the geographical location of the assessment area, the assessment purpose, and the assessment type;

[0008] Based on the task information, a data collection instruction is sent to the data collection device, so that the data collection device collects the groundwater sample data, geological data, and hydrogeological parameters of the assessment area;

[0009] Receive the groundwater sample data, the geological data, and the hydrogeological parameters transmitted by the data acquisition device, and store the groundwater sample data, the geological data, and the hydrogeological parameters in a database;

[0010] Conduct an analysis of the pollutant content based on the groundwater sample data to determine the types, contents, and distribution of pollutants in the groundwater sample;

[0011] According to the pollutant types, retrieve the physical and chemical properties, migration and transformation laws, and toxicological parameters of the corresponding pollutants from the pollutant property database;

[0012] Perform numerical simulation processing based on the physical and chemical properties and the migration and transformation laws to obtain a groundwater pollutant migration model, and simulate the diffusion range and concentration changes of pollutants in the groundwater environment under different time scales to obtain simulation results;

[0013] Based on the simulation results, combined with the sensitive receptor distribution data, calculate the pollution exposure pathways and exposure amounts;

[0014] According to the toxicological parameters and the exposure amounts, calculate the health risk indices and carcinogenic risk probabilities of different sensitive receptors;

[0015] Compare the health risk indices and the carcinogenic risk probabilities with the risk assessment criteria to determine the risk level of groundwater pollution in the assessment area;

[0016] Generate a risk assessment report based on the risk level;

[0017] Send the risk assessment report to the risk management system, and provide a visual risk distribution map and dynamic simulation results of pollutant migration according to the user demand data.

[0018] Optionally, perform numerical simulation processing based on the physical and chemical properties and the migration and transformation laws to obtain a groundwater pollutant migration model, including:

[0019] Establish a hydrogeological conceptual model of the assessment area according to the hydrogeological parameters; wherein, the hydrogeological conceptual model includes aquifer structure, boundary conditions, and initial conditions;

[0020] Divide the assessment area into finite element grids and assign hydrogeological parameters to the nodes;

[0021] Select a preset mathematical model; wherein, when the pollutant type belongs to conservative pollutants, the preset mathematical model is the advection-dispersion equation, and when the pollutant type belongs to reactive pollutants, the preset mathematical model is the advection-dispersion-reaction equation;

[0022] Set the boundary conditions of the hydrogeological conceptual model; wherein, the boundary conditions include constant head boundary, constant flow boundary, pollution source boundary, and natural boundary;

[0023] Calibrate the model parameters of the hydrogeological conceptual model based on the measured data to obtain the groundwater pollutant migration model.

[0024] Optionally, based on the simulation results and combined with the sensitive receptor distribution data, calculate the pollution exposure pathways and exposure amounts, including:

[0025] Identify the sensitive receptor distribution data within the evaluation area; wherein, the sensitive receptors include: residential areas, schools, hospitals, water sources, and ecologically sensitive areas;

[0026] Determine the exposure pathways based on the sensitive receptor distribution data; wherein, the exposure pathways include: drinking contaminated groundwater, skin contact with contaminated groundwater, and inhalation of the gas volatilized from contaminated groundwater;

[0027] Calculate the exposure amount based on the exposure pathways, the exposure frequencies, exposure times, body weights, and life expectancies of the sensitive receptors.

[0028] Optionally, generate a risk assessment report based on the risk level, including:

[0029] Generate a risk assessment report based on the risk level; wherein, the risk assessment report includes: assessment overview, pollution status assessment, pollution source analysis, pollution diffusion prediction, health risk assessment, ecological risk assessment, risk level determination, risk control suggestions, and risk monitoring plan.

[0030] This application also provides a device for assessing the pollution risk of the groundwater environment, including:

[0031] A task information acquisition module, configured to acquire the task information of the groundwater pollution risk assessment input by the user; wherein, the task information includes: geographical location of the evaluation area, evaluation purpose, and evaluation type;

[0032] A data collection module, configured to send a data collection instruction to the data collection device based on the task information, so that the data collection device collects the groundwater sample data, geological data, and hydrogeological parameters of the evaluation area;

[0033] A data storage module, configured to receive the groundwater sample data, the geological data, and the hydrogeological parameters transmitted by the data collection device, and store the groundwater sample data, the geological data, and the hydrogeological parameters in a database;

[0034] A pollutant analysis module for analyzing the pollutant content based on the groundwater sample data to determine the pollutant types, contents and distribution in the groundwater samples;

[0035] A pollutant confirmation module for retrieving the physical and chemical properties, migration and transformation laws and toxicological parameters of the corresponding pollutants from the pollutant property database according to the pollutant types;

[0036] A pollution simulation module for performing numerical simulation processing based on the physical and chemical properties and the migration and transformation laws to obtain a groundwater pollutant migration model, and simulating the diffusion range and concentration change of pollutants in the groundwater environment at different time scales to obtain simulation results;

[0037] An exposure calculation module for calculating the pollution exposure pathways and exposure amounts based on the simulation results in combination with the sensitive receptor distribution data;

[0038] A risk calculation module for calculating the health risk indices and carcinogenic risk probabilities of different sensitive receptors according to the toxicological parameters and the exposure amounts;

[0039] A risk level determination module for comparing the health risk indices and the carcinogenic risk probabilities with the risk assessment criteria to determine the risk level of groundwater pollution in the assessment area;

[0040] A report generation module for generating a risk assessment report based on the risk level;

[0041] A display module for sending the risk assessment report to the risk management system and providing a visual risk distribution map and pollutant migration dynamic simulation results according to the user demand data.

[0042] Optionally, the pollution simulation module is specifically configured to establish a hydrogeological conceptual model of the assessment area according to the hydrogeological parameters; wherein, the hydrogeological conceptual model includes an aquifer structure, boundary conditions and initial conditions; divide the assessment area into finite element grids and allocate hydrogeological parameters at the nodes; select a preset mathematical model; wherein, when the pollutant type belongs to conservative pollutants, the preset mathematical model is the convection-dispersion equation, and when the pollutant type belongs to reactive pollutants, the preset mathematical model is the convection-dispersion-reaction equation; set the boundary conditions of the hydrogeological conceptual model; wherein, the boundary conditions include constant head boundaries, constant flow boundaries, pollution source boundaries and natural boundaries; calibrate the model parameters of the hydrogeological conceptual model based on the measured data to obtain the groundwater pollutant migration model.

[0043] Optionally, the exposure calculation module is specifically configured to identify the distribution data of sensitive receptors within the evaluation area; wherein, the sensitive receptors include: residential areas, schools, hospitals, water sources, and ecologically sensitive areas; determine the exposure pathways based on the distribution data of the sensitive receptors; wherein, the exposure pathways include: drinking contaminated groundwater, skin contact with contaminated groundwater, and inhalation of the gas volatilized from contaminated groundwater; calculate the exposure amount based on the exposure pathways, the exposure frequency, exposure time, body weight, and life expectancy of the sensitive receptors.

[0044] Optionally, the report generation module is specifically configured to generate a risk assessment report based on the risk level; wherein, the risk assessment report includes: assessment overview, assessment of pollution status, source analysis of pollution sources, prediction of pollution diffusion, health risk assessment, ecological risk assessment, determination of risk level, risk control suggestions, and risk monitoring plan.

[0045] This application also provides a pollution risk assessment device, including:

[0046] A memory for storing a computer program;

[0047] A processor for implementing the steps of the pollution risk assessment method as described above when executing the computer program.

[0048] This application also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the pollution risk assessment method as described above are implemented.

[0049] A method for assessing the pollution risk of groundwater environment provided by this application includes: an assessment device obtains task information of groundwater pollution risk assessment input by a user; wherein, the task information includes: geographical location of the assessment area, assessment purpose, and assessment type; based on the task information, a data collection instruction is sent to a data collection device so that the data collection device collects groundwater sample data, geological data, and hydrogeological parameters of the assessment area; the groundwater sample data, the geological data, and the hydrogeological parameters transmitted by the data collection device are received and stored in a database; based on the groundwater sample data, pollutant content analysis is carried out to judge the pollutant type, content, and distribution in the groundwater sample; according to the pollutant type, the physical and chemical properties, migration and transformation laws, and toxicological parameters of the corresponding pollutant are retrieved from a pollutant characteristics database; based on the physical and chemical properties and the migration and transformation laws, numerical simulation processing is carried out to obtain a groundwater pollutant migration model, and the diffusion range and concentration change of pollutants in the groundwater environment under different time scales are simulated to obtain a simulation result; based on the simulation result, combined with sensitive receptor distribution data, the pollution exposure pathway and exposure amount are calculated; according to the toxicological parameters and the exposure amount, the health risk index and carcinogenic risk probability of different sensitive receptors are calculated; the health risk index and the carcinogenic risk probability are compared with a risk assessment standard to determine the risk level of groundwater pollution in the assessment area; a risk assessment report is generated based on the risk level; the risk assessment report is sent to a risk management system, and a visual risk distribution map and a dynamic simulation result of pollutant migration are provided according to user demand data.

[0050] It has the following beneficial effects:

[0051] Through the constructed groundwater pollutant migration model, the migration and diffusion of pollutants in groundwater can be accurately simulated. The exposure amount is calculated by combining the distribution of sensitive receptors, and the risk index and probability are calculated based on toxicological parameters, and finally the risk level is determined. The application of this series of models greatly improves the accuracy and scientificity of risk assessment, provides a reliable basis for groundwater pollution prevention and control, and effectively reduces potential environmental risks. Description of the Drawings

[0052] In order to more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the following will briefly introduce the drawings required for description in the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of this application. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0053] Figure 1Flow chart of a method for assessing the pollution risk of a groundwater environment provided by an embodiment of the present application;

[0054] Figure 2 Structural schematic diagram of a device for assessing the pollution risk of a groundwater environment provided by an embodiment of the present application;

[0055] Figure 3 Structural schematic diagram of pollution risk assessment equipment provided by an embodiment of the present application. Detailed implementation manners

[0056] The purpose of the present application is to provide a method for assessing the pollution risk of a groundwater environment, a pollution risk assessment device, pollution risk assessment equipment, and a computer-readable storage medium, so as to improve the effectiveness and accuracy of groundwater pollution risk assessment.

[0057] In order to make the purpose, technical solutions and advantages of the present invention clearer, 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. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0058] The following describes a method for assessing the pollution risk of a groundwater environment provided by the present application through an embodiment.

[0059] Please refer to Figure 1 , Figure 1 Flow chart of a method for assessing the pollution risk of a groundwater environment provided by an embodiment of the present application.

[0060] In this embodiment, the method may include:

[0061] S101, the assessment device obtains task information for assessing the pollution risk of groundwater input by the user; wherein, the task information includes: geographical location of the assessment area, assessment purpose, assessment type;

[0062] In this step, the basic information of the assessment task is clarified, providing a direction for subsequent targeted data collection and assessment processes. Different geographical locations of the assessment area, assessment purposes, and assessment types determine the focus of data collection and the selection of assessment methods.

[0063] Among them, the assessment device sets an interactive interface, for example, through a graphical user interface (GUI) or a command-line interface, enabling the user to input information such as the geographical location of the assessment area (such as specific longitude and latitude ranges, administrative region names, etc.), assessment purpose (such as assessment of the safety of drinking water sources, assessment before pollution site remediation, etc.), assessment type (qualitative assessment, quantitative assessment, or a combination of both, etc.), and collecting and organizing this information.

[0064] S102. Send a data collection instruction to the data collection device based on the task information, so that the data collection device can collect groundwater sample data, geological data, and hydrogeological parameters in the evaluation area.

[0065] In this step, according to the evaluation task requirements, the basic data required for evaluation is accurately obtained. Different evaluation tasks have different requirements for data. By driving data collection through task information, it is ensured that the collected data is closely related to the evaluation task.

[0066] Among them, the evaluation device establishes a communication connection with the data collection device, such as through a wired network (Ethernet), a wireless network (Wi-Fi, 4G / 5G, etc.). According to the received task information, the evaluation device generates a corresponding data collection instruction, which contains information such as the area range and collection parameters of data collection, and sends it to the data collection device. The data collection device collects groundwater samples, conducts geological exploration to obtain geological data, and measures hydrogeological parameters (such as permeability coefficient, porosity, etc.) using professional instruments in the evaluation area according to the instruction.

[0067] It can be seen that this step ensures the pertinence and accuracy of data collection, and the high-quality data obtained lays a solid foundation for accurately evaluating the groundwater pollution risk subsequently, avoiding deviations in the evaluation results caused by missing or incorrect data.

[0068] S103. Receive the groundwater sample data, geological data, and hydrogeological parameters transmitted by the data collection device, and store the groundwater sample data, geological data, and hydrogeological parameters in the database.

[0069] In this step, the collected data is centrally managed and stored, facilitating subsequent data retrieval and analysis. The use of a database can effectively organize and store a large amount of complex data, facilitating data retrieval and sharing.

[0070] Among them, the evaluation device continuously monitors the transmission signal of the data collection device. When the data is received, the data is subjected to format verification and preliminary data cleaning (such as removing obviously incorrect data). Then, the data is stored in the database according to the preset database structure (such as the table structure of a relational database). The database can be a local database (such as SQLite) or a remote database (such as MySQL, Oracle, etc.).

[0071] Ensure the security and accessibility of the data, facilitate multiple departments and multiple personnel to obtain the data for analysis and evaluation at any time when needed, improve the utilization efficiency of the data, and also provide conditions for long-term data accumulation and comparative analysis.

[0072] S104. Analyze the pollutant content based on the groundwater sample data to determine the types, contents, and distribution of pollutants in the groundwater samples.

[0073] In this step, through the chemical analysis of groundwater samples, the specific conditions of pollutants therein are determined, which is a key link in evaluating the groundwater pollution risk. Understanding the types, contents, and distributions of pollutants can directly reflect the pollution degree and scope of groundwater.

[0074] In this step, professional chemical analysis methods are adopted, such as chromatographic analysis (gas chromatography, liquid chromatography), mass spectrometry analysis (gas chromatography - mass spectrometry, liquid chromatography - mass spectrometry), etc. to detect the groundwater samples. The detection results are compared with the known pollutant standard spectra or data to determine the types of pollutants; according to the intensity of the detection signals, combined with methods such as standard curves, the contents of pollutants are calculated; through the analysis of data at different sampling points, the distribution map of pollutants is drawn to judge the distribution of pollutants.

[0075] It can be seen that this step visually presents the current situation of groundwater pollution, provides core data support for subsequent pollution risk assessment, helps the assessment personnel quickly understand the severity and influence scope of pollution, and provides a basis for formulating targeted treatment measures.

[0076] S105. According to the types of pollutants, retrieve the physical and chemical properties, migration and transformation laws, and toxicological parameters of the corresponding pollutants from the pollutant property database.

[0077] In this step, different pollutants have different properties, which determine the behavior of pollutants in groundwater and the degree of harm to human health. By retrieving pollutant property data, a theoretical basis is provided for subsequent simulation and risk calculation.

[0078] In this step, a pollutant property database is established, which stores the physical and chemical properties (such as solubility, volatility, etc.), migration and transformation laws (such as adsorption - desorption laws, degradation kinetics, etc.), and toxicological parameters (such as median lethal dose, daily allowable intake, etc.) of various common pollutants. The evaluation device retrieves and matches in the database according to the determined types of pollutants to obtain the corresponding property data.

[0079] This step provides a scientific basis for accurately evaluating the migration and diffusion of pollutants in groundwater and the risk to human health, avoids evaluation errors caused by insufficient understanding of pollutant properties, and improves the scientificity and reliability of the evaluation.

[0080] S106. Based on the physical and chemical properties and migration and transformation laws, conduct numerical simulation processing to obtain a groundwater pollutant migration model, and simulate the diffusion range and concentration changes of pollutants in the groundwater environment under different time scales to obtain simulation results.

[0081] This step can use a mathematical model to simulate the migration process of pollutants in groundwater. Considering the complexity of the groundwater system and the dynamic changes of pollutants, numerical simulation can predict the diffusion trend of pollutants and provide forward-looking data for risk assessment.

[0082] In this step, first, a hydrogeological conceptual model of the assessment area (including aquifer structure, boundary conditions, initial conditions, etc.) is established based on hydrogeological parameters. The assessment area is divided into finite element grids and hydrogeological parameters are assigned to the nodes. Then, a preset mathematical model is selected according to the pollutant type (the convection-dispersion equation for conservative pollutants and the convection-dispersion-reaction equation for reactive pollutants), and the model boundary conditions (constant head boundary, constant flow boundary, etc.) are set. Finally, the model parameters are calibrated based on the measured data to obtain the groundwater pollutant migration model. This model is used to simulate the diffusion range and concentration changes of pollutants at different time scales.

[0083] This step predicts the diffusion trend of pollutants in advance, helps assessors understand the future development trend of groundwater pollution, provides a time lead for formulating pollution prevention and control measures, and reduces potential environmental risks.

[0084] S107. Based on the simulation results and combined with the sensitive receptor distribution data, calculate the pollution exposure pathways and exposure amounts;

[0085] This step assesses the impact of pollution on sensitive receptors. The key lies in determining the pathways and amounts of contact through which sensitive receptors may come into contact with pollutants. Combining the simulation results and the sensitive receptor distribution data can more accurately assess the risks of human or ecological systems being exposed to pollutants.

[0086] In this step, first, identify the sensitive receptor distribution data in the assessment area (residential areas, schools, hospitals, water sources, ecologically sensitive areas, etc.). According to the positions of the sensitive receptors and the diffusion simulation results of the pollutants, determine the exposure pathways (drinking contaminated groundwater, skin contact with contaminated groundwater, inhaling the gas volatilized from contaminated groundwater, etc.). Then, based on the exposure pathways and combined with parameters such as the exposure frequency, exposure time, body weight, and life expectancy of the sensitive receptors, calculate the exposure amount through the corresponding calculation formulas.

[0087] This step starts from the perspective of actual exposure, more accurately assesses the pollution risk, provides a scientific basis for protecting sensitive receptors, makes the risk assessment results more valuable for practical applications, and helps formulate more effective risk prevention and control measures.

[0088] S108. According to the toxicological parameters and exposure amounts, calculate the health risk indices and carcinogenic risk probabilities of different sensitive receptors;

[0089] This step combines the toxicity of pollutants and the exposure of sensitive receptors to quantitatively evaluate the potential harm to human health. By calculating the health risk index and carcinogenic risk probability, it can intuitively reflect the harm degree of pollution to different sensitive receptors.

[0090] Based on the previously obtained toxicological parameters (such as the daily allowable intake, carcinogenic slope factor, etc.) and the calculated exposure amount, this step uses the corresponding risk assessment model (such as the health risk assessment model recommended by the US Environmental Protection Agency) to calculate the health risk index (such as the non-carcinogenic risk quotient) and carcinogenic risk probability of different sensitive receptors.

[0091] This step presents the risk of pollution to human health in a quantitative manner, providing a clear numerical basis for risk classification and risk management, which is convenient for managers to take different countermeasures according to the risk level.

[0092] S109. Compare the health risk index and carcinogenic risk probability with the risk assessment criteria to determine the risk level of groundwater pollution in the assessment area;

[0093] In order to intuitively and uniformly measure the degree of pollution risk, this step needs to compare the calculated risk value with the established risk assessment criteria, so as to divide different risk levels.

[0094] This step establishes a set of scientific and reasonable risk assessment criteria, which includes the boundaries for dividing risk levels corresponding to different health risk indices and carcinogenic risk probabilities. Compare the calculated health risk index and carcinogenic risk probability with the risk assessment criteria one by one to determine the risk level of groundwater pollution in the assessment area (such as low risk, medium risk, high risk, etc.).

[0095] Through this step, the evaluation results are made easier to understand and compare, which is convenient for managers to quickly judge the severity of pollution risk and provides clear guidance for formulating targeted risk control strategies.

[0096] S110. Generate a risk assessment report based on the risk level;

[0097] This step presents the entire evaluation process and results in the form of a report, providing comprehensive and systematic information for decision-makers and relevant personnel, facilitating them to understand the groundwater pollution situation and risk level in the assessment area, and making reasonable decisions accordingly.

[0098] Based on the risk level, this step combines the previous pollutant content analysis, simulation results and other data to generate a risk assessment report according to the report template. The report content covers the assessment of pollution status (pollutant types, contents, distributions, etc.), prediction of pollution diffusion (diffusion range and concentration changes at different time scales), and risk control suggestions (proposing corresponding treatment and prevention measures for different risk levels).

[0099] This step provides strong support for groundwater pollution management and decision-making, enabling relevant personnel to quickly understand the overall situation of the assessment area, providing a basis for formulating scientific and reasonable environmental protection and treatment plans, and promoting the effective solution of groundwater pollution problems.

[0100] S111, send the risk assessment report to the risk management system, and provide a visual risk distribution map and pollutant migration dynamic simulation results according to the user demand data.

[0101] This step timely transmits the evaluation results to the risk management system for the relevant departments to manage and make decisions. At the same time, it provides a visual data display method, making complex data and evaluation results more intuitive and easy to understand, and facilitating users to quickly obtain key information.

[0102] In this step, the evaluation device sends the risk assessment report to the risk management system through network communication. Using Geographic Information System (GIS) technology and data visualization tools, data such as risk levels and pollutant distributions are converted into a risk distribution map; the pollutant migration simulation results are made into a dynamic simulation video or animation, and corresponding visual content is provided according to user needs.

[0103] It can be seen that this step improves the information transmission efficiency, facilitating the risk management department to timely grasp the situation and make decisions. The visual display method helps non-professionals understand complex evaluation data, promotes public participation and supervision, and promotes the development of groundwater pollution control work.

[0104] In summary, through the constructed groundwater pollutant migration model in this embodiment, the migration and diffusion of pollutants in groundwater can be accurately simulated. The exposure amount is calculated by combining the distribution of sensitive receptors, and the risk index and probability are calculated based on toxicological parameters, and finally the risk level is determined. The application of this series of models greatly improves the accuracy and scientific nature of risk assessment, provides a reliable basis for groundwater pollution prevention and control, and effectively reduces potential environmental risks.

[0105] Optionally, numerical simulation processing is carried out based on physical and chemical properties and migration and transformation laws to obtain a groundwater pollutant migration model, including:

[0106] Step 1, establish a hydrogeological conceptual model of the assessment area according to hydrogeological parameters; among them, the hydrogeological conceptual model includes aquifer structure, boundary conditions, and initial conditions;

[0107] Step 2, divide the assessment area into finite element grids and assign hydrogeological parameters to the nodes;

[0108] Step 3, select a preset mathematical model; among them, when the pollutant type belongs to conservative pollutants, the preset mathematical model is the convection-dispersion equation, and when the pollutant type belongs to reactive pollutants, the preset mathematical model is the convection-dispersion-reaction equation;

[0109] Step 4, set the boundary conditions of the hydrogeological conceptual model; among them, the boundary conditions include constant head boundary, constant flow boundary, pollution source boundary, and natural boundary;

[0110] Step 5, calibrate the model parameters of the hydrogeological conceptual model based on the measured data to obtain the groundwater pollutant migration model.

[0111] In this alternative solution, when simulating the migration of groundwater pollutants, the hydrogeological conditions and pollutant characteristics will have a significant impact on the migration process. By establishing a hydrogeological conceptual model, dividing the grid, selecting an appropriate mathematical model, setting boundary conditions, and calibrating parameters, a groundwater pollutant migration model that can accurately reflect the actual situation is constructed to simulate the migration and diffusion laws of different types of pollutants in groundwater.

[0112] Establish a hydrogeological conceptual model: Based on the obtained hydrogeological parameters, determine the aquifer structure, such as the number of aquifer layers, the thickness and lithology of each layer, etc.; clarify the boundary conditions, including constant head boundary (the boundary with fixed water level), constant flow boundary (the boundary with fixed flow rate), pollution source boundary (the boundary where pollutants enter), and natural boundary (such as impermeable boundary); set the initial conditions, that is, the initial concentration distribution of pollutants in groundwater at the beginning of the simulation, etc.

[0113] Divide the finite element grid and assign parameters: Divide the evaluation area into a finite number of small grids, and assign corresponding hydrogeological parameters, such as permeability coefficient, porosity, etc., to each node, so that the model can more accurately simulate the hydrogeological characteristics at different positions in the area.

[0114] Select a preset mathematical model: Judge the pollutant type. If it is a conservative pollutant (without chemical reaction during migration, only migrating and diffusing with the water flow), select the convection-dispersion equation; if it is a reactive pollutant (with chemical reactions during migration, such as adsorption, degradation, etc.), then select the convection-dispersion-reaction equation.

[0115] Set the boundary conditions: According to the actual situation, assign corresponding values or conditions to various boundaries of the hydrogeological conceptual model to ensure that the model can truly reflect the interaction between the groundwater system and the outside world.

[0116] Model parameter calibration: Use the actual measurement data to adjust and optimize the parameters in the model to make the model simulation results as close as possible to the actual observation data, so as to obtain a reliable groundwater pollutant migration model.

[0117] It can be seen that the groundwater pollutant migration model constructed in this alternative solution can more accurately reflect the migration laws of different types of pollutants under complex hydrogeological conditions, improving the accuracy and reliability of the simulation. It provides more accurate model support for subsequent prediction of the diffusion range and concentration change of pollutants in groundwater, helps to more scientifically evaluate the groundwater pollution risk, and provides a strong basis for formulating effective pollution prevention and control measures.

[0118] Optionally, based on the simulation results and combined with the sensitive receptor distribution data, calculate the pollution exposure pathways and exposure amounts, including:

[0119] Step 1, identify the sensitive receptor distribution data within the evaluation area; among them, the sensitive receptors include: residential areas, schools, hospitals, water sources, and ecologically sensitive areas;

[0120] Step 2, determine the exposure pathways based on the sensitive receptor distribution data; among them, the exposure pathways include: drinking contaminated groundwater, skin contact with contaminated groundwater, and inhalation of the gas volatilized from contaminated groundwater.

[0121] Step 3, calculate the exposure amount based on the exposure pathways, exposure frequencies, exposure times, body weights, and life expectancies of the sensitive receptors.

[0122] In this alternative solution, the key to evaluating the risk of groundwater pollution to sensitive receptors lies in determining the pathways and amounts of contact between sensitive receptors and pollutants. By identifying the sensitive receptor distribution, determining the exposure pathways, and calculating the exposure amount in combination with relevant parameters, the degree of exposure of sensitive receptors to contaminated groundwater can be quantified, providing a basis for subsequent accurate assessment of health risks.

[0123] Identify the sensitive receptor distribution data: Collect the geographical location information of sensitive receptors such as residential areas, schools, hospitals, water sources, and ecologically sensitive areas within the evaluation area, which can be obtained through geographical information system (GIS) data, field surveys, or data provided by relevant departments.

[0124] Determine the exposure pathways: Analyze the possible contact methods according to the location of the sensitive receptors and the groundwater pollution situation. For example, if the groundwater near a residential area is contaminated, the possible exposure pathways include drinking contaminated groundwater, skin contact with contaminated groundwater (such as through activities like washing and irrigation), and inhalation of the gas volatilized from contaminated groundwater.

[0125] Calculating exposure: For each exposure pathway, parameters such as the exposure frequency of sensitive receptors (e.g., the number of times of drinking groundwater per day), exposure time (e.g., the duration of contact with contaminated groundwater per day), body weight (used to evaluate the relative impact of pollutants on the human body), and life expectancy are combined, and the corresponding calculation formula is used to calculate the exposure. For example, when calculating the exposure to contaminated groundwater, factors such as the daily water intake, pollutant concentration, and exposure time are involved.

[0126] Precisely determining the pollution exposure pathways and exposure amounts of sensitive receptors in this alternative provides key data support for accurately assessing the risks of groundwater pollution to human health and the ecosystem. It can more scientifically measure the impact degree of pollution on different sensitive receptors, helps to formulate targeted measures to protect sensitive receptors, improves the accuracy and practicality of risk assessment, and provides a more reliable basis for groundwater pollution risk management.

[0127] Optionally, generate a risk assessment report based on the risk level, including:

[0128] Generate a risk assessment report based on the risk level; among them, the risk assessment report includes: assessment overview, current pollution assessment, pollution source analysis, pollution diffusion prediction, health risk assessment, ecological risk assessment, risk level determination, risk control suggestions, and risk monitoring plan.

[0129] Among them, the risk assessment report is presented as the result of the entire assessment work, and needs to comprehensively and systematically include various aspects of information so that decision-makers and relevant personnel can clearly understand the current situation, development trend, and response strategies of groundwater pollution in the assessment area. By integrating various aspects of content to generate the report, it provides strong support for groundwater pollution management and decision-making.

[0130] Generate a report framework based on the risk level: According to the determined risk level, build the basic framework of the risk assessment report, and clarify the main chapters and content structure of the report.

[0131] Collect and collate data: Summarize various types of data obtained during the previous assessment process, including assessment overview (assessment purpose, scope, method, etc.), current pollution assessment (pollutant types, contents, distributions, etc.), pollution source analysis (analysis of the sources of pollutants), pollution diffusion prediction (diffusion situations at different time scales based on model simulations), health risk assessment (calculated health risk indices and carcinogenic risk probabilities for different sensitive receptors), ecological risk assessment (assessment of potential impacts on the ecosystem), risk level determination (clarify the current risk level), risk control suggestions (put forward specific treatment and prevention and control measures for different risk levels), and risk monitoring plan (plan the key points and methods of subsequent monitoring).

[0132] Report writing and improvement: Organize and write the collected and sorted data systematically according to the report framework to ensure clear logic and accurate data in the report. Elaborate and analyze each item in detail to form a complete risk assessment report.

[0133] The risk assessment report generated in this alternative is comprehensive and systematic, providing a one-stop information resource for groundwater pollution management and decision-making. It enables relevant personnel to quickly and comprehensively understand the groundwater pollution status in the assessment area, including key information such as the current pollution situation, potential risks, and countermeasures, which helps improve the scientificity and timeliness of decision-making and promotes the effective implementation of groundwater pollution control and protection work.

[0134] Next, a pollution risk assessment device for groundwater environment provided by an embodiment of the present application will be introduced. A pollution risk assessment device for groundwater environment described below can be correspondingly referred to a pollution risk assessment method for groundwater environment.

[0135] Please refer to Figure 2 , Figure 2 which is a schematic structural diagram of a pollution risk assessment device for groundwater environment provided by an embodiment of the present application.

[0136] In this embodiment, the device may include:

[0137] A task information acquisition module 100, configured to acquire task information of groundwater pollution risk assessment input by a user; wherein, the task information includes: geographical location of the assessment area, assessment purpose, and assessment type;

[0138] A data acquisition module 200, configured to send a data acquisition instruction to a data acquisition device based on the task information, so that the data acquisition device acquires groundwater sample data, geological data, and hydrogeological parameters of the assessment area;

[0139] A data storage module 300, configured to receive the groundwater sample data, geological data, and hydrogeological parameters transmitted by the data acquisition device, and store the groundwater sample data, geological data, and hydrogeological parameters in a database;

[0140] A pollutant analysis module 400, configured to analyze the pollutant content based on the groundwater sample data, and judge the pollutant types, contents, and distribution in the groundwater samples;

[0141] A pollutant confirmation module 500, configured to retrieve the physical and chemical properties, migration and transformation laws, and toxicological parameters of the corresponding pollutants from a pollutant property database according to the pollutant types;

[0142] The pollution simulation module 600 is used to perform numerical simulation processing based on physical and chemical properties and migration and transformation laws to obtain a groundwater pollutant migration model, and simulate the diffusion range and concentration change of pollutants in the groundwater environment at different time scales to obtain simulation results;

[0143] The exposure calculation module 700 is used to calculate pollution exposure pathways and exposure amounts based on the simulation results and in combination with sensitive receptor distribution data;

[0144] The risk calculation module 800 is used to calculate the health risk index and carcinogenic risk probability of different sensitive receptors according to toxicological parameters and exposure amounts;

[0145] The risk level determination module 900 is used to compare the health risk index and carcinogenic risk probability with risk assessment criteria to determine the risk level of groundwater pollution in the evaluation area;

[0146] The report generation module 1000 is used to generate a risk assessment report based on the risk level;

[0147] The display module 1100 is used to send the risk assessment report to the risk management system and provide a visual risk distribution map and pollutant migration dynamic simulation results according to user demand data.

[0148] This application also provides a pollution risk assessment device, please refer to Figure 3 , Figure 3 which is a schematic structural diagram of the pollution risk assessment device provided by the embodiment of this application. The pollution risk assessment device may include:

[0149] A memory for storing computer programs;

[0150] A processor, when executing the computer program, can implement the steps of any of the above pollution risk assessment methods for the groundwater environment.

[0151] As Figure 3 shown, it is a schematic composition structure diagram of the pollution risk assessment device. The pollution risk assessment device may include: a processor 10, a memory 11, a communication interface 12, and a communication bus 13. The processor 10, the memory 11, and the communication interface 12 all complete mutual communication through the communication bus 13.

[0152] In the embodiment of this application, the processor 10 may be a central processing unit (CPU), an application specific integrated circuit, a digital signal processor, a field programmable gate array, or other programmable logic devices, etc.

[0153] The processor 10 may call the program stored in the memory 11. Specifically, the processor 10 may execute the operations in the embodiments of the exception IP recognition method.

[0154] The memory 11 is used to store one or more programs. The program may include program codes, and the program codes include computer operation instructions. In the embodiments of the present application, the memory 11 stores at least programs for implementing the following functions:

[0155] The evaluation device obtains the task information of the groundwater pollution risk assessment input by the user; wherein, the task information includes: the geographical location of the evaluation area, the evaluation purpose, and the evaluation type.

[0156] Based on the task information, send a data collection instruction to the data collection device so that the data collection device can collect groundwater sample data, geological data, and hydrogeological parameters of the evaluation area.

[0157] Receive the groundwater sample data, geological data, and hydrogeological parameters transmitted by the data collection device, and store the groundwater sample data, geological data, and hydrogeological parameters in the database.

[0158] Based on the groundwater sample data, perform an analysis of the pollutant content to determine the pollutant type, content, and distribution in the groundwater sample.

[0159] According to the pollutant type, retrieve the physical and chemical properties, migration and transformation laws, and toxicological parameters of the corresponding pollutant from the pollutant property database.

[0160] Based on the physical and chemical properties and migration and transformation laws, perform numerical simulation processing to obtain a groundwater pollutant migration model, and simulate the diffusion range and concentration change of the pollutant in the groundwater environment at different time scales to obtain simulation results.

[0161] Based on the simulation results, combined with the sensitive receptor distribution data, calculate the pollution exposure pathways and exposure amounts.

[0162] According to the toxicological parameters and exposure amounts, calculate the health risk index and carcinogenic risk probability of different sensitive receptors.

[0163] Compare the health risk index and carcinogenic risk probability with the risk assessment criteria to determine the risk level of groundwater pollution in the evaluation area.

[0164] Generate a risk assessment report based on the risk level.

[0165] Send the risk assessment report to the risk management system, and provide a visual risk distribution map and pollutant migration dynamic simulation results according to the user demand data.

[0166] In a possible implementation, the memory 11 may include a program storage area and a data storage area. The program storage area may store an operating system, application programs required for at least one function, etc.; the data storage area may store data created during use.

[0167] In addition, the memory 11 may include high-speed random access memory and may also include non-volatile memory, such as at least one disk storage device or other volatile solid-state storage devices.

[0168] The communication interface 12 may be an interface of a communication module for connecting to other devices or systems.

[0169] Of course, it should be noted that Figure 3 the structure shown does not limit the pollution risk assessment device in the embodiments of the present application. In actual applications, the pollution risk assessment device may include more or fewer components than Figure 3 those shown, or combine certain components.

[0170] The present application also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of any one of the above-described pollution risk assessment methods for groundwater environment can be implemented.

[0171] The computer-readable storage medium may include: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical discs.

[0172] For the introduction of the computer-readable storage medium provided in the present application, please refer to the above method embodiments, and the present application will not elaborate herein.

[0173] The various embodiments in the specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0174] Those skilled in the art may further realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. To clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described according to functions in the above description. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0175] The steps of the method or algorithm described in combination with the embodiments disclosed herein can be directly implemented by hardware, a software module executed by a processor, or a combination of the two. The software module can be placed in a random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, register, hard disk, removable disk, CD-ROM, or any other form of storage medium well-known in the technical field.

[0176] The above has introduced in detail a method for assessing the pollution risk of a groundwater environment, a pollution risk assessment device, a pollution risk assessment equipment, and a computer-readable storage medium provided by this application. Specific examples are used herein to elaborate on the principle and implementation manner of this application. The description of the above embodiments is only used to help understand the method and its core idea of this application. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of this application, several improvements and modifications can still be made to this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A method for assessing the pollution risk of a groundwater environment, characterized in that Including: An evaluation device obtains task information for the evaluation of groundwater pollution risk input by a user; wherein, the task information includes: the geographical location of the evaluation area, the evaluation purpose, and the evaluation type; Based on the task information, a data collection instruction is sent to a data collection device, so that the data collection device collects groundwater sample data, geological data, and hydrogeological parameters of the evaluation area; Receive the groundwater sample data, the geological data, and the hydrogeological parameters transmitted by the data collection device, and store the groundwater sample data, the geological data, and the hydrogeological parameters in a database; Based on the groundwater sample data, perform an analysis of the pollutant content to determine the pollutant type, content, and distribution in the groundwater sample; According to the pollutant type, retrieve the physical and chemical properties, migration and transformation laws, and toxicological parameters of the corresponding pollutant from a pollutant characteristics database; Based on the physical and chemical properties and the migration and transformation laws, perform numerical simulation processing to obtain a groundwater pollutant migration model, and simulate the diffusion range and concentration change of pollutants in the groundwater environment at different time scales to obtain a simulation result; Based on the simulation result, combined with the sensitive receptor distribution data, calculate the pollution exposure pathway and exposure amount; According to the toxicological parameters and the exposure amount, calculate the health risk index and carcinogenic risk probability of different sensitive receptors; Compare the health risk index and the carcinogenic risk probability with a risk assessment standard to determine the risk level of groundwater pollution in the evaluation area; Generate a risk assessment report based on the risk level; Send the risk assessment report to a risk management system, and provide a visual risk distribution map and a dynamic simulation result of pollutant migration according to user demand data.

2. The pollution risk assessment method according to claim 1, wherein Based on the physical and chemical properties and the migration and transformation laws, perform numerical simulation processing to obtain a groundwater pollutant migration model, including: Establish a hydrogeological conceptual model of the evaluation area according to the hydrogeological parameters; wherein, the hydrogeological conceptual model includes an aquifer structure, boundary conditions, and initial conditions; Divide the evaluation area into finite element meshes and assign hydrogeological parameters at the nodes; Select a preset mathematical model; wherein, when the pollutant type belongs to a conservative pollutant, the preset mathematical model is the advection-dispersion equation, and when the pollutant type belongs to a reactive pollutant, the preset mathematical model is the advection-dispersion-reaction equation; Set the boundary conditions of the hydrogeological conceptual model; wherein, the boundary conditions include a constant head boundary, a constant flow boundary, a pollution source boundary, and a natural boundary; Calibrate the model parameters of the hydrogeological conceptual model based on measured data to obtain the groundwater pollutant migration model.

3. The pollution risk assessment method according to claim 2, wherein Based on the simulation result, combined with the sensitive receptor distribution data, calculate the pollution exposure pathway and exposure amount, including: Identify the sensitive receptor distribution data in the evaluation area; wherein, the sensitive receptors include: residential areas, schools, hospitals, water sources, and ecologically sensitive areas; Determine the exposure pathway based on the sensitive receptor distribution data; wherein, the exposure pathways include: drinking contaminated groundwater, skin contact with contaminated groundwater, and inhalation of the gas volatilized from contaminated groundwater; Calculate the exposure amount based on the exposure pathway, exposure frequency, exposure time, body weight, and life expectancy of the sensitive receptor.

4. The pollution risk assessment method according to claim 3, characterized in that Generate a risk assessment report based on the risk level, including: Generate a risk assessment report based on the risk level; wherein, the risk assessment report includes: assessment overview, assessment of pollution status, source analysis of pollution sources, prediction of pollution diffusion, health risk assessment, ecological risk assessment, determination of risk level, risk control suggestions, and risk monitoring plan.

5. A pollution risk assessment device for a groundwater environment, characterized in that, Include: A task information acquisition module for acquiring the task information of the groundwater pollution risk assessment input by the user; wherein, the task information includes: geographical location of the assessment area, assessment purpose, and assessment type; A data collection module for sending a data collection instruction to the data collection device based on the task information, so that the data collection device collects the groundwater sample data, geological data, and hydrogeological parameters of the assessment area; A data storage module for receiving the groundwater sample data, the geological data, and the hydrogeological parameters transmitted by the data collection device, and storing the groundwater sample data, the geological data, and the hydrogeological parameters in a database; A pollutant analysis module for analyzing the pollutant content based on the groundwater sample data, and judging the pollutant type, content, and distribution in the groundwater sample; A pollutant confirmation module for retrieving the physical and chemical properties, migration and transformation laws, and toxicological parameters of the corresponding pollutants from the pollutant property database according to the pollutant type; A pollution simulation module for performing numerical simulation processing based on the physical and chemical properties and the migration and transformation laws to obtain a groundwater pollutant migration model, and simulating the diffusion range and concentration change of pollutants in the groundwater environment under different time scales to obtain simulation results; An exposure calculation module for calculating the pollution exposure pathway and exposure amount based on the simulation results in combination with the sensitive receptor distribution data; A risk calculation module for calculating the health risk index and carcinogenic risk probability of different sensitive receptors according to the toxicological parameters and the exposure amount; A risk level determination module for comparing the health risk index and the carcinogenic risk probability with the risk assessment criteria to determine the risk level of groundwater pollution in the assessment area; A report generation module for generating a risk assessment report based on the risk level; A display module for sending the risk assessment report to the risk management system, and providing a visual risk distribution map and a dynamic simulation result of pollutant migration according to the user demand data.

6. The pollution risk assessment device according to claim 5, wherein The pollution simulation module is specifically configured to establish a hydrogeological conceptual model of the evaluation area according to the hydrogeological parameters; wherein, the hydrogeological conceptual model includes an aquifer structure, boundary conditions, and initial conditions; divide the evaluation area into finite element grids and assign hydrogeological parameters to the nodes; select a preset mathematical model; wherein, when the pollutant type belongs to conservative pollutants, the preset mathematical model is the convection-dispersion equation, and when the pollutant type belongs to reactive pollutants, the preset mathematical model is the convection-dispersion-reaction equation; set the boundary conditions of the hydrogeological conceptual model; wherein, the boundary conditions include constant head boundaries, constant flow boundaries, pollution source boundaries, and natural boundaries; calibrate the model parameters of the hydrogeological conceptual model based on measured data to obtain the groundwater pollutant migration model.

7. The pollution risk assessment device according to claim 6, wherein, The exposure calculation module is specifically configured to identify the distribution data of sensitive receptors in the evaluation area; wherein, the sensitive receptors include: residential areas, schools, hospitals, water sources, and ecologically sensitive areas; determine the exposure pathways based on the distribution data of the sensitive receptors; wherein, the exposure pathways include: drinking contaminated groundwater, skin contact with contaminated groundwater, and inhalation of gases volatilized from contaminated groundwater; calculate the exposure amount based on the exposure pathways, the exposure frequency, exposure time, body weight, and life expectancy of the sensitive receptors.

8. The pollution risk assessment device according to claim 7, wherein, The report generation module is specifically configured to generate a risk assessment report based on the risk level; wherein, the risk assessment report includes: an assessment overview, a pollution status assessment, a pollution source analysis, a pollution diffusion prediction, a health risk assessment, an ecological risk assessment, a risk level determination, risk control suggestions, and a risk monitoring plan.

9. A pollution risk assessment device, characterized in that, Comprising: A memory for storing a computer program; A processor for implementing the steps of the pollution risk assessment method according to any one of claims 1 to 4 when executing the computer program.

10. A computer-readable storage medium, characterized in that, A computer program is stored on the computer-readable storage medium, and when the computer program is executed by the processor, the steps of the pollution risk assessment method according to any one of claims 1 to 4 are implemented.

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