A drinking water source environmental risk assessment method and system

Abstract

The present invention discloses a method and system for environmental risk assessment of drinking water sources, which relates to the field of risk assessment, including S1, obtaining the comprehensive characteristic value of the drinking water source to be assessed; S2, generating the pollutant migration capacity value of the drinking water source to be assessed; S3, obtaining the environmental risk assessment range of the drinking water source to be assessed; S4, generating the potential pollution risk value of the drinking water source to be assessed; The present invention integrates basic and meteorological information, characterizes the characteristics of the water source, optimizes the remote sensing monitoring cycle, and improves the monitoring efficiency. The method scientifically assesses risks and reasonably allocates monitoring resources. At the same time, by analyzing the activity data of pollution sources and the migration capacity of pollutants, potential risks can be effectively obtained, risk management can be enhanced, and targeted measures can be formulated.

Description

Technical Field

[0001] The present invention relates to the field of risk assessment, and in particular to a method and system for assessing environmental risk of drinking water sources. Background Art

[0002] The water quality of drinking water sources is directly related to public health, and it is crucial to conduct risk assessments on their environment. In addition, drinking water sources are usually an important part of the ecosystem, and risk assessments can help protect these sensitive environmental areas and maintain ecological balance.

[0003] Existing technology, such as the invention patent with announcement number: CN105654236B, is a groundwater drinking water source pollution risk assessment method, which can evaluate the pollution risk of groundwater drinking water sources in time and space. The method includes: obtaining the groundwater inherent vulnerability assessment results and pollution source hazard level of the area where the groundwater drinking water source is located; coupling the regional groundwater inherent vulnerability assessment results and pollution source hazard level to conduct a preliminary assessment of the regional pollution risk; superimposing the groundwater dynamic change information under mining conditions on the preliminary assessment results to obtain the water source pollution risk assessment under mining conditions; superimposing the groundwater value information on the assessment results of the water source pollution risk under mining conditions to conduct a secondary assessment of the regional pollution risk; and based on the secondary assessment results, the migration simulation of characteristic pollutants under the mining conditions of the water source is conducted to complete the groundwater drinking water source pollution risk assessment.

[0004] The prior art, such as the invention patent with announcement number: CN109447347B, is a method for optimizing the site selection of water sources based on environmental risk avoidance, which belongs to the field of environmental science and environmental risk technology, and includes the following three steps: Step 1: Calculate the size Si of each risk source and the probability Pi of an accident around the drinking water source to obtain the risk value Rsi of the risk source; Step 2: Based on the risk value of the risk source and the degree of hazard of the accident, use the software ArcGIS 10.2 and the inverse distance weighted interpolation method to construct a risk isovalue distribution map of drinking water sources; Step 3: Divide the risk level of drinking water sources, and propose a water source optimization site selection plan or an environmental risk source adjustment plan according to the principle of risk avoidance.

[0005] Based on the above technical solutions, it can be seen that the existing technology usually adopts field investigation and sampling methods with direct contact with water bodies when conducting risk assessment on water sources. However, for water sources with large water areas, the use of field investigation and sampling with direct contact with water bodies requires large human resources and monitoring resources, and there will be problems with incomplete monitoring and insufficient timeliness in data processing. Summary of the invention

[0006] In view of the shortcomings of the prior art, the present invention provides a method and system for assessing the environmental risk of drinking water sources. To achieve the above objectives, the present invention is implemented through the following technical solutions: A method and system for assessing the environmental risk of drinking water sources, comprising:

[0007] S1. Obtain basic information of the drinking water source to be evaluated, process and analyze to generate basic characteristic values ​​of the drinking water source to be evaluated, and collect meteorological information of the drinking water source to be evaluated, and jointly analyze and process to obtain comprehensive characteristic values ​​of the drinking water source to be evaluated.

[0008] S2. Based on the comprehensive characteristic value matching of the drinking water source to be evaluated, the remote sensing monitoring period of the drinking water source to be evaluated is obtained, and the hydrological data are obtained by conducting hydrological monitoring on the drinking water source to be evaluated, and the pollutant migration capacity value of the drinking water source to be evaluated is generated through processing and analysis.

[0009] S3. Based on the comprehensive characteristic values ​​of the drinking water source to be assessed and the pollutant migration capacity values, the environmental risk assessment scope of the drinking water source to be assessed is obtained through comprehensive processing and analysis.

[0010] S4. Identify and compile data on pollution source activities within the scope of environmental risk assessment for the drinking water source to be assessed, and analyze and process the data to generate potential pollution risk values ​​for the drinking water source to be assessed.

[0011] S5. Compare and analyze the potential pollution risk value of the drinking water source to be assessed with the pollutant migration capacity value of the drinking water source to be assessed to obtain the environmental risk assessment result of the drinking water source to be assessed.

[0012] As a preferred technical solution, the basic information of the drinking water source to be evaluated is obtained, processed and analyzed to generate the basic characteristic values ​​of the drinking water source to be evaluated, specifically including:

[0013] The basic information of the drinking water source to be evaluated includes the area, average slope, average terrain height and magnitude of the population supplied by the drinking water source to be evaluated.

[0014] A basic information verification value set is extracted from the database, including an area verification value, an average slope verification value, and an average terrain height verification value.

[0015] Based on the magnitude of the supply population of the drinking water source to be evaluated, a mapping match is performed with the supply population magnitude influencing factors corresponding to each supply population magnitude interval pre-stored in the database to obtain the supply population magnitude influencing factors of the drinking water source to be evaluated.

[0016] The basic information of the drinking water source to be evaluated, the basic information verification value set and the influencing factors of the magnitude of the supplied population are comprehensively analyzed and processed to obtain the basic characteristic values ​​of the drinking water source to be evaluated.

[0017] The basic characteristic values ​​of the drinking water source to be evaluated are used to characterize the importance of the drinking water source to be evaluated.

[0018] As a preferred technical solution, the statistical meteorological information of the drinking water source to be evaluated and the joint analysis and processing to obtain the comprehensive characteristic value of the drinking water source to be evaluated include:

[0019] The meteorological information of the drinking water source to be evaluated includes the average precipitation, average temperature and average wind speed within a set time period.

[0020] The meteorological verification information of the water source to be evaluated is extracted from the database, including the average precipitation verification value, the average temperature verification value and the average wind speed verification value, and is analyzed and processed together with the meteorological information of the drinking water source to be evaluated to generate the meteorological influencing factor of the drinking water source to be evaluated.

[0021] Based on the basic characteristic values ​​and meteorological influencing factors of the drinking water source to be evaluated, a joint analysis and processing is performed to generate the comprehensive characteristic values ​​of the drinking water source to be evaluated.

[0022] The comprehensive characteristic values ​​of the drinking water source to be evaluated are used to comprehensively characterize the geographical characteristics and meteorological characteristics of the drinking water source to be evaluated.

[0023] As a preferred technical solution, the remote sensing monitoring period of the drinking water source to be evaluated is obtained based on the comprehensive characteristic value matching of the drinking water source to be evaluated, and hydrological data is obtained by performing hydrological monitoring on the drinking water source to be evaluated, which specifically includes:

[0024] Based on the comprehensive characteristic values ​​of the drinking water source to be evaluated, mapping and matching are performed with the remote sensing monitoring periods corresponding to each comprehensive characteristic value interval pre-stored in the database to obtain the remote sensing monitoring period of the drinking water source to be evaluated.

[0025] Based on the remote sensing monitoring period of the drinking water source to be evaluated, hydrological monitoring is performed on the drinking water source to be evaluated during the remote sensing monitoring period to obtain hydrological data of the drinking water source to be evaluated, wherein the hydrological data include the average water flow velocity of each remote sensing point, the water color change rate, and the water level height change rate of the drinking water source to be evaluated.

[0026] As a preferred technical solution, the processing analysis generates the pollutant migration capacity value of the drinking water source to be evaluated, specifically including:

[0027] The preset average water flow velocity assessment benchmark value, water body color change rate assessment benchmark value and water level height change rate assessment benchmark value are extracted from the database, and jointly analyzed and processed with the average water flow velocity, water body color change rate and water level height change rate of each remote sensing point of the drinking water source to be assessed during the remote sensing monitoring period to obtain the pollutant migration capacity value of the drinking water source to be assessed.

[0028] The pollutant migration capacity value of the drinking water source to be evaluated is used to characterize the self-purification capacity of the drinking water source to be evaluated.

[0029] As a preferred technical solution, the comprehensive processing and analysis obtains the environmental risk assessment scope of the drinking water source to be assessed, specifically including:

[0030] Based on the pollutant migration capacity value of the drinking water source to be assessed, a mapping and matching is performed with the environmental risk assessment range values ​​corresponding to each pollutant migration capacity value interval pre-stored in the database to obtain the environmental risk assessment range value of the drinking water source to be assessed.

[0031] With the center point of the drinking water source to be assessed as the center of the circle and the environmental risk assessment range as the radius, the environmental risk assessment range of the drinking water source to be assessed is mapped.

[0032] As a preferred technical solution, the identification and statistics of pollution source activity data within the environmental risk assessment scope of the drinking water source to be assessed, the specific processing conditions are:

[0033] Acquire remote sensing image data within the environmental risk assessment scope of the drinking water source to be assessed, and identify and mark potential pollution sources within the environmental risk assessment scope based on the remote sensing image data.

[0034] The activity data of each potential pollution source includes the area occupied and the straight-line distribution distance of each potential pollution source.

[0035] As a preferred technical solution, the environmental risk assessment results of the drinking water source to be assessed are obtained, specifically including:

[0036] Extract activity definition data from the database, including area definition values ​​and linear distribution distance definition values.

[0037] The activity data of each potential pollution source is compared and analyzed with the activity definition data to obtain the potential pollution risk value of the drinking water source to be assessed.

[0038] Based on the pollutant migration capacity value of the drinking water source to be assessed and the potential pollution risk value of the drinking water source to be assessed, a comprehensive analysis and processing is carried out to obtain the comprehensive environmental risk assessment value of the drinking water source to be assessed, and the environmental risk assessment results of the drinking water source to be assessed are obtained.

[0039] When the comprehensive environmental risk assessment value of the drinking water source to be assessed is greater than or equal to the comprehensive environmental risk assessment threshold, the environmental risk assessment result of the drinking water source to be assessed is judged to be high risk.

[0040] When the comprehensive environmental risk assessment value of the drinking water source to be assessed is less than the comprehensive environmental risk assessment threshold, the environmental risk assessment result of the drinking water source to be assessed is judged to be low risk.

[0041] As a preferred technical solution, the comprehensive environmental risk assessment value of the drinking water source to be assessed is obtained by:

[0042] ;

[0043] in, is the comprehensive environmental risk assessment value of the drinking water source to be assessed, is the potential pollution risk value of the drinking water source to be assessed, is the pollutant migration capacity value of the drinking water source to be assessed, is the environmental risk assessment range value of the drinking water source to be assessed, The function is the activation function, , The function is the activation function, , The function is the activation function, .

[0044] In addition, a drinking water source environmental risk assessment system is also provided, including:

[0045] The comprehensive characteristic evaluation module obtains the basic information of the drinking water source to be evaluated, processes and analyzes it to generate the basic characteristic values ​​of the drinking water source to be evaluated, and collects statistics on the meteorological information of the drinking water source to be evaluated, and jointly analyzes and processes it to obtain the comprehensive characteristic values ​​of the drinking water source to be evaluated.

[0046] The pollutant migration capacity assessment module obtains the remote sensing monitoring period of the drinking water source to be assessed based on the comprehensive characteristic value matching of the drinking water source to be assessed, conducts hydrological monitoring on the drinking water source to be assessed to obtain hydrological data, and processes and analyzes the data to generate the pollutant migration capacity value of the drinking water source to be assessed.

[0047] The environmental risk assessment scope generation module obtains the environmental risk assessment scope of the drinking water source to be assessed based on the comprehensive characteristic values ​​of the drinking water source to be assessed and the pollutant migration capacity values.

[0048] The potential pollution risk assessment module identifies and compiles the pollution source activity data within the environmental risk assessment scope of the drinking water source to be assessed, and analyzes and processes the data to generate the potential pollution risk value of the drinking water source to be assessed.

[0049] The environmental risk assessment module compares and analyzes the potential pollution risk value of the drinking water source to be assessed with the pollutant migration capacity value of the drinking water source to be assessed, and obtains the environmental risk assessment result of the drinking water source to be assessed.

[0050] Compared with the prior art, the embodiments of the present invention have at least the following beneficial effects:

[0051] (1) The present invention provides a method for assessing the environmental risk of drinking water sources. By collecting basic information of the drinking water sources to be assessed and taking full account of the meteorological information of the drinking water sources to be assessed, the method analyzes and obtains a comprehensive characteristic value for characterizing the importance of the drinking water sources to be assessed, and obtains a targeted remote sensing monitoring cycle. The method comprehensively considers various factors, conducts an in-depth feature analysis of the characteristics of the drinking water sources to be assessed, and determines the remote sensing monitoring cycle based on the actual characteristics, which helps to optimize resource allocation and improve monitoring efficiency.

[0052] (2) The present invention obtains the environmental risk assessment scope of the drinking water source to be assessed through analysis and processing, so as to more scientifically assess the environmental risk of the drinking water source and more reasonably allocate monitoring resources to avoid waste of resources and prevent problems such as excessive monitoring or insufficient monitoring.

[0053] (3) The present invention obtains the potential pollution risk of the drinking water source to be assessed by identifying and counting the pollution source activity data within the scope of environmental risk assessment of the drinking water source to be assessed, and conducts a comprehensive analysis with the pollutant migration capacity value of the drinking water source to be assessed, which helps to formulate targeted measures and further enhance the risk management effect.

[0054] Of course, any product implementing the present invention does not necessarily need to achieve all of the above advantages at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 It is a schematic diagram of the method flow of the present invention.

[0056] Figure 2 It is a schematic diagram of the system module of the present invention. DETAILED DESCRIPTION

[0057] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0058] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0059] See also Figure 1As shown, an embodiment of the present invention provides a method for assessing environmental risk of a drinking water source, comprising:

[0060] S1. Obtain basic information of the drinking water source to be evaluated, process and analyze to generate basic characteristic values ​​of the drinking water source to be evaluated, and collect meteorological information of the drinking water source to be evaluated, and jointly analyze and process to obtain comprehensive characteristic values ​​of the drinking water source to be evaluated.

[0061] The obtaining of basic information of the drinking water source to be evaluated, processing and analyzing to generate basic characteristic values ​​of the drinking water source to be evaluated specifically includes:

[0062] The basic information of the drinking water source to be evaluated includes the area, average slope, average terrain height and magnitude of the population supplied by the drinking water source to be evaluated.

[0063] Use geographic information system (GIS) and satellite remote sensing technology to obtain high-resolution remote sensing images, and calculate the area of ​​drinking water sources through image interpretation and spatial analysis. Use terrain analysis tools in GIS software to obtain the average slope. Digital elevation model (DEM) provides detailed data on surface elevation, and DEM data can be analyzed through GIS software to obtain the average terrain height.

[0064] The area of ​​drinking water sources to be assessed refers to the total area of ​​land or water covered by the drinking water sources, reflecting the scale of the water sources and the total amount of water resources.

[0065] The average slope of the drinking water source to be assessed refers to the vertical distance of rise or fall per unit length of the water source surface, usually expressed as a percentage or angle. The slope affects the speed and direction of surface runoff, and thus affects the water quality of the water body. High slopes usually lead to soil erosion and increase the risk of pollutants entering the water body.

[0066] The average elevation of the drinking water source to be assessed refers to the average height of the ground at the water source, usually expressed as altitude. It affects meteorological conditions such as temperature and precipitation, and thus affects the water quality of the water body.

[0067] The magnitude of the population supplied by the drinking water source to be assessed refers to the total population served by the drinking water source, reflecting the importance of the water source. The larger the magnitude, the more important the protection and management of the water source.

[0068] A basic information verification value set is extracted from the database, including an area verification value, an average slope verification value, and an average terrain height verification value.

[0069] Based on the magnitude of the supply population of the drinking water source to be evaluated, a mapping match is performed with the supply population magnitude influencing factors corresponding to each supply population magnitude interval pre-stored in the database to obtain the supply population magnitude influencing factors of the drinking water source to be evaluated.

[0070] The basic information of the drinking water source to be evaluated, the basic information verification value set and the influencing factors of the supply population magnitude are comprehensively analyzed and processed to obtain the basic characteristic values ​​of the drinking water source to be evaluated, including:

[0071] ;

[0072] in, is the basic characteristic value of the drinking water source to be assessed, is the area of ​​the drinking water source to be assessed, is the average slope of the drinking water source to be assessed, is the average terrain height of the drinking water source to be assessed, is the area calibration value, is the average slope calibration value, is the average terrain height calibration value, is the magnitude factor affecting the supply population of the drinking water source to be assessed. The softplus function is a built-in function in Python. .

[0073] It should be noted that the basic information of the drinking water source to be evaluated includes the area, average slope, average terrain height and the magnitude of the population supplied by the drinking water source to be evaluated. There is a certain correlation between these parameters. Areas with a smaller average slope usually lead to slow water flow, which is conducive to the deposition of pollutants, while areas with larger slopes usually lead to soil erosion and increase the risk of pollutants entering the water body. Changes in terrain height usually affect the hydrological cycle of the water source, and thus affect the distribution and availability of water resources. Water sources with larger areas can usually support more water supply needs, so they are positively correlated with the magnitude of the population supplied. The average slope can reflect the steepness of the terrain of the water source, while the terrain height reflects the relative position of the water source. High slope areas are usually located in higher terrain, which usually increases the risk of soil erosion. Changes in terrain height usually affect the distribution of slopes. For example, water sources in mountainous areas usually have larger slopes. Changes in slope usually affect the water quality and quantity of the water source, and thus affect its water supply capacity.

[0074] The basic characteristic values ​​of the drinking water source to be evaluated are used to characterize the importance of the drinking water source to be evaluated.

[0075] Collect meteorological information of the drinking water source to be evaluated, and jointly analyze and process to obtain the comprehensive characteristic values ​​of the drinking water source to be evaluated, including:

[0076] The meteorological information of the drinking water source to be evaluated includes the average precipitation, average temperature and average wind speed within a set time period. In an embodiment of the present invention, the set time period is one year.

[0077] Based on remote sensing technology, the meteorological information of the drinking water source to be evaluated within the past year is retrieved.

[0078] Average precipitation refers to the average amount of precipitation in the drinking water source to be evaluated within a set time period, which is used to measure the water resource recharge of the water source. Precipitation directly affects the water recharge of the water source. Precipitation can wash away surface pollutants into the water body, so precipitation is closely related to the water quality of the water source. Precipitation affects evaporation, runoff and groundwater recharge, which in turn affects the dynamics of the entire hydrological system.

[0079] Average temperature refers to the average temperature of the drinking water source to be evaluated within a set time period. Rising temperature will increase evaporation, thus affecting the water balance of the water source. Temperature conditions affect the growth and metabolism of organisms in the water body, thereby affecting water quality. Temperature can affect the solubility and reaction rate of pollutants in the water body, thus affecting water quality safety.

[0080] Average wind speed refers to the average wind speed of the drinking water source to be assessed within a set time period. Increased wind speed can accelerate water evaporation and affect the amount of water in the water source. Wind speed can affect the diffusion speed and range of pollutants in the air and water, thereby affecting the environmental risk of the water source.

[0081] The meteorological verification information of the water source to be evaluated is extracted from the database, including the average precipitation verification value, the average temperature verification value and the average wind speed verification value, and is analyzed and processed together with the meteorological information of the drinking water source to be evaluated to generate the meteorological influencing factors of the drinking water source to be evaluated, including:

[0082] ;

[0083] in, is the meteorological influencing factor of the drinking water source to be assessed, is the average precipitation in the drinking water source area to be assessed within the set time period, is the average temperature of the drinking water source to be assessed within the set time period, is the average wind speed of the drinking water source to be assessed within the set time period, is the average precipitation calibration value, is the average temperature calibration value, is the average wind speed calibration value.

[0084] It should be noted that the meteorological information of the drinking water source to be evaluated includes the average precipitation, average temperature and average wind speed within the set time period. These parameters have a certain correlation. The increase in temperature usually increases the evaporation rate of water. If the temperature is high, even if the precipitation is large, water is usually lost through evaporation, affecting the amount of water in the water source. Wind speed can affect the distribution of precipitation. Strong winds usually lead to uneven distribution of precipitation, which increases precipitation in some areas and usually decreases in other areas. Increased wind speed accelerates evaporation on the surface of the water body. If the precipitation is not enough to make up for the evaporation loss, it usually leads to a decrease in the amount of water in the water source. The temperature and wind speed act together on the evaporation of the water surface, affecting the water cycle and the water balance of the water source. Precipitation, temperature and wind speed act together on the water cycle process. Precipitation provides water, temperature affects evaporation and transpiration, and wind speed affects the dispersion and evaporation rate of water. Temperature can affect the concentration of dissolved oxygen in water and the chemical behavior of pollutants, while precipitation and wind speed affect the input and diffusion of pollutants.

[0085] Based on the basic characteristic values ​​and meteorological influencing factors of the drinking water source to be evaluated, the comprehensive characteristic values ​​of the drinking water source to be evaluated are jointly analyzed and processed, including:

[0086] ;

[0087] in, is the comprehensive characteristic value of the drinking water source to be assessed, is the basic characteristic value of the drinking water source to be assessed, is the meteorological influencing factor of the drinking water source to be assessed, is the activation function, .

[0088] The comprehensive characteristic values ​​of the drinking water source to be evaluated are used to comprehensively characterize the geographical characteristics and meteorological characteristics of the drinking water source to be evaluated.

[0089] S2. Based on the comprehensive characteristic value matching of the drinking water source to be evaluated, the remote sensing monitoring period of the drinking water source to be evaluated is obtained, and the hydrological data are obtained by conducting hydrological monitoring on the drinking water source to be evaluated, and the pollutant migration capacity value of the drinking water source to be evaluated is generated through processing and analysis.

[0090] Based on the comprehensive characteristic value matching of the drinking water source to be evaluated, the remote sensing monitoring period of the drinking water source to be evaluated is obtained, and the hydrological data of the drinking water source to be evaluated is obtained by conducting hydrological monitoring, including:

[0091] Based on the comprehensive characteristic values ​​of the drinking water source to be evaluated, mapping and matching are performed with the remote sensing monitoring periods corresponding to each comprehensive characteristic value interval pre-stored in the database to obtain the remote sensing monitoring period of the drinking water source to be evaluated.

[0092] Based on the remote sensing monitoring cycle of the drinking water source to be evaluated, remote sensing technology and UAV technology are used to conduct hydrological monitoring of the drinking water source to be evaluated during the remote sensing monitoring cycle to obtain the hydrological data of the drinking water source to be evaluated, wherein the hydrological data include the average water flow velocity of each remote sensing point, the water color change rate and the water level height change rate of the drinking water source to be evaluated.

[0093] Average water flow velocity refers to the average speed of water flow monitored by each remote sensing point during the remote sensing monitoring period. Flow velocity affects the migration speed and diffusion range of pollutants in the water body. The faster the flow velocity, the faster the pollutants move, and usually affect the downstream area more quickly. Flow velocity can reflect the water cycle status of the water source, which is of great significance for water resources management and scheduling.

[0094] The water color change rate refers to the degree of change in water color during the remote sensing monitoring period, which is usually related to changes in suspended matter, algae growth, and other dissolved substances in the water. Changes in water color can be used as an indicator of water quality changes. For example, turbid water usually indicates an increase in suspended matter, while green water usually indicates algae growth. Changes in water color can also reflect the health of aquatic ecosystems, such as algal bloom events usually indicate eutrophication of water bodies.

[0095] The water level change rate refers to the height by which the water level rises or falls during the remote sensing monitoring period.

[0096] The processing analysis generates the pollutant migration capacity value of the drinking water source to be evaluated, specifically including:

[0097] The preset average water flow velocity assessment benchmark value, water body color change rate assessment benchmark value and water level height change rate assessment benchmark value are extracted from the database, and the average water flow velocity, water body color change rate and water level height change rate of each remote sensing point of the drinking water source to be assessed during the remote sensing monitoring period are jointly analyzed and processed to obtain the pollutant migration capacity value of the drinking water source to be assessed, including:

[0098] ;

[0099] in, is the pollutant migration capacity value of the drinking water source to be assessed, For the The average water flow velocity at each remote sensing point is For the The water color change rate at each remote sensing point, is the rate of change of water level of the drinking water source to be assessed, The average water flow rate is the benchmark value. It is the benchmark value for evaluating the rate of change of water color. The benchmark value for evaluating the rate of change of water level height is is the remote sensing point number, , is the total number of remote sensing points, is the activation function, .

[0100] It should be noted that the hydrological data include the average water flow velocity of each remote sensing point, the rate of change of water color, and the rate of change of water level height of the drinking water source to be evaluated. There is a certain correlation between these parameters, and the change of flow velocity is usually closely related to the change of water level. The rise of water level is accompanied by an increase in flow velocity, because the increase in water volume will increase water pressure, thereby accelerating the water flow. On the contrary, the drop in water level leads to a slow flow rate. Changes in flow velocity usually affect the distribution of suspended and dissolved substances in the water body, thereby affecting the color of the water body. For example, faster flow rate usually stirs up the bottom mud, making the water body turbid and increasing the rate of color change. Slower flow rate usually causes suspended matter to settle, the water body color becomes clear, and the rate of color change decreases. Changes in water level usually change the flow velocity and direction of the water body, thereby affecting the distribution of suspended and dissolved substances, resulting in changes in water color. Rising water levels usually submerge new vegetation or sediments and change the color of the water body. Dropping water levels usually expose sediments or riverbeds, which also affects the color of the water body. They are all important indicators in the water cycle process and are closely related to each other through the water cycle process. Changes in flow rate and water level can affect the distribution of suspended and dissolved matter in the water, thus affecting water quality and color.

[0101] The pollutant migration capacity value of the drinking water source to be evaluated is used to characterize the self-purification capacity of the drinking water source to be evaluated.

[0102] S3. Based on the comprehensive characteristic values ​​of the drinking water source to be assessed and the pollutant migration capacity values, the environmental risk assessment scope of the drinking water source to be assessed is obtained through comprehensive processing and analysis.

[0103] The comprehensive processing and analysis obtains the environmental risk assessment scope of the drinking water source to be assessed, including:

[0104] Based on the pollutant migration capacity value of the drinking water source to be assessed, a mapping and matching is performed with the environmental risk assessment range values ​​corresponding to each pollutant migration capacity value interval pre-stored in the database to obtain the environmental risk assessment range value of the drinking water source to be assessed.

[0105] With the center point of the drinking water source to be assessed as the center of the circle and the environmental risk assessment range as the radius, the environmental risk assessment range of the drinking water source to be assessed is mapped.

[0106] S4. Identify and compile data on pollution source activities within the scope of environmental risk assessment for the drinking water source to be assessed, and analyze and process the data to generate potential pollution risk values ​​for the drinking water source to be assessed.

[0107] The specific processing conditions for identifying and counting the pollution source activity data within the environmental risk assessment scope of the drinking water source to be assessed are:

[0108] Acquire remote sensing image data within the environmental risk assessment scope of the drinking water source to be assessed, and identify and mark potential pollution sources within the environmental risk assessment scope based on the remote sensing image data.

[0109] The activity data of each potential pollution source includes the area occupied by each potential pollution source and the linear distribution distance. Satellite remote sensing technology is used to obtain high-resolution remote sensing images, and the area occupied by each potential pollution source is calculated through image interpretation and spatial analysis. The terrain analysis tool in the GIS software is used to obtain the linear distribution distance.

[0110] The land area refers to the area covered by potential pollution sources (such as industrial facilities, agricultural land, landfills, etc.) on the ground. The land area can reflect the scope of the pollution source. The larger the area, the wider the potential pollution impact may be.

[0111] Straight-line distance refers to the shortest straight-line distance from a potential pollution source to a drinking water source, also known as the Euclidean distance. Straight-line distance can be used to assess the likelihood of contaminants spreading from the source to a drinking water source. The closer the distance, the higher the risk of contaminants spreading to the water source. A pollution source that is close may have a more direct and severe impact on a drinking water source, while a pollution source that is far away may have a relatively small impact.

[0112] The environmental risk assessment results of the drinking water source to be assessed include:

[0113] Extract activity definition data from the database, including area definition values ​​and linear distribution distance definition values.

[0114] Compare and analyze the activity data of each potential pollution source with the activity definition data to obtain the potential pollution risk value of the drinking water source to be assessed, including:

[0115] ;

[0116] in, is the potential pollution risk value of the drinking water source to be assessed, For the The area occupied by potential pollution sources, For the The linear distribution distance of potential pollution sources, is the defined value of the land area, is the limit value of the straight line distribution distance, Number the potential sources of contamination. , is the total number of potential pollution sources, The function is the activation function, .

[0117] S5. Compare and analyze the potential pollution risk value of the drinking water source to be assessed with the pollutant migration capacity value of the drinking water source to be assessed to obtain the environmental risk assessment result of the drinking water source to be assessed.

[0118] Based on the pollutant migration capacity value of the drinking water source to be assessed and the potential pollution risk value of the drinking water source to be assessed, a comprehensive analysis and processing is carried out to obtain the comprehensive environmental risk assessment value of the drinking water source to be assessed, and the environmental risk assessment results of the drinking water source to be assessed are obtained.

[0119] The comprehensive environmental risk assessment value of the drinking water source to be assessed includes:

[0120] ;

[0121] in, is the comprehensive environmental risk assessment value of the drinking water source to be assessed, is the potential pollution risk value of the drinking water source to be assessed, is the pollutant migration capacity value of the drinking water source to be assessed, is the environmental risk assessment range value of the drinking water source to be assessed, The function is the activation function, , The function is the activation function, , The function is the activation function, .

[0122] When the comprehensive environmental risk assessment value of the drinking water source to be assessed is greater than or equal to the comprehensive environmental risk assessment threshold, the environmental risk assessment result of the drinking water source to be assessed is judged to be high risk.

[0123] When the comprehensive environmental risk assessment value of the drinking water source to be assessed is less than the comprehensive environmental risk assessment threshold, the environmental risk assessment result of the drinking water source to be assessed is judged to be low risk.

[0124] When the environmental risk assessment result of the drinking water source to be assessed is high risk, an early warning message is sent to the management terminal, and the remote sensing monitoring period of the drinking water source to be assessed is adjusted based on the comprehensive environmental risk assessment value of the drinking water source to be assessed, specifically including: subtracting the comprehensive environmental risk assessment value of the drinking water source to be assessed from the comprehensive environmental risk assessment threshold to obtain the remote sensing monitoring period adjustment factor of the drinking water source to be assessed, mapping and matching the remote sensing monitoring period compensation adjustment days corresponding to each remote sensing monitoring period adjustment factor interval pre-stored in the database based on the remote sensing monitoring period adjustment factor of the drinking water source to be assessed, obtaining the remote sensing monitoring period adjustment days of the drinking water source to be assessed, and adjusting to obtain the advanced remote sensing monitoring period of the drinking water source to be assessed.

[0125] When the environmental risk assessment result of the drinking water source to be assessed is low risk, the original remote sensing monitoring period of the drinking water source to be assessed will be used as the advanced remote sensing monitoring period.

[0126] In this embodiment, the present invention provides a drinking water source environmental risk assessment system, comprising:

[0127] The comprehensive characteristic evaluation module obtains the basic information of the drinking water source to be evaluated, processes and analyzes it to generate the basic characteristic values ​​of the drinking water source to be evaluated, and collects statistics on the meteorological information of the drinking water source to be evaluated, and jointly analyzes and processes it to obtain the comprehensive characteristic values ​​of the drinking water source to be evaluated.

[0128] The pollutant migration capacity assessment module obtains the remote sensing monitoring period of the drinking water source to be assessed based on the comprehensive characteristic value matching of the drinking water source to be assessed, conducts hydrological monitoring on the drinking water source to be assessed to obtain hydrological data, and processes and analyzes the data to generate the pollutant migration capacity value of the drinking water source to be assessed.

[0129] The environmental risk assessment scope generation module obtains the environmental risk assessment scope of the drinking water source to be assessed based on the comprehensive characteristic values ​​of the drinking water source to be assessed and the pollutant migration capacity values.

[0130] The potential pollution risk assessment module identifies and compiles the pollution source activity data within the environmental risk assessment scope of the drinking water source to be assessed, and analyzes and processes the data to generate the potential pollution risk value of the drinking water source to be assessed.

[0131] The environmental risk assessment module compares and analyzes the potential pollution risk value of the drinking water source to be assessed with the pollutant migration capacity value of the drinking water source to be assessed, and obtains the environmental risk assessment result of the drinking water source to be assessed.

[0132] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0133] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that technicians in the relevant technical field can understand and use the present invention well. As long as they do not deviate from the structure of the present invention or exceed the scope defined by the present invention, they should all belong to the protection scope of the present invention.

Claims

1. A drinking water source environmental risk assessment method, characterized in that: include: S1. Obtain basic information of the drinking water source to be evaluated, process and analyze to generate basic characteristic values ​​of the drinking water source to be evaluated, and collect meteorological information of the drinking water source to be evaluated, and jointly analyze and process to obtain comprehensive characteristic values ​​of the drinking water source to be evaluated; S2. Obtain the remote sensing monitoring period of the drinking water source to be assessed based on the comprehensive characteristic value matching of the drinking water source to be assessed, conduct hydrological monitoring on the drinking water source to be assessed to obtain hydrological data, and process and analyze to generate the pollutant migration capacity value of the drinking water source to be assessed; S3. Based on the comprehensive characteristic values ​​of the drinking water source to be assessed, and the pollutant migration capacity values, a comprehensive analysis is performed to obtain the environmental risk assessment scope of the drinking water source to be assessed; S4. Identify and compile data on pollution source activities within the scope of environmental risk assessment for the drinking water source to be assessed, and analyze and process data to generate potential pollution risk values ​​for the drinking water source to be assessed; S5. Compare and analyze the potential pollution risk value of the drinking water source to be assessed with the pollutant migration capacity value of the drinking water source to be assessed to obtain the environmental risk assessment result of the drinking water source to be assessed; The specific processing conditions for identifying and counting the pollution source activity data within the environmental risk assessment scope of the drinking water source to be assessed are: Obtain remote sensing image data within the scope of environmental risk assessment of the drinking water source to be assessed, identify and mark potential pollution sources within the scope of environmental risk assessment based on the remote sensing image data; The activity data of each potential pollution source includes the area occupied by each potential pollution source and the linear distribution distance; The environmental risk assessment results of the drinking water source to be assessed include: Extract activity definition data from the database, including area definition values ​​and linear distribution distance definition values; Compare and analyze the activity data of each potential pollution source with the activity definition data to obtain the potential pollution risk value of the drinking water source to be assessed; Based on the pollutant migration capacity value of the drinking water source to be assessed, a comprehensive analysis and processing is performed with the potential pollution risk value of the drinking water source to be assessed to obtain the comprehensive environmental risk assessment value of the drinking water source to be assessed, and the environmental risk assessment result of the drinking water source to be assessed is obtained; When the comprehensive environmental risk assessment value of the drinking water source to be assessed is greater than or equal to the comprehensive environmental risk assessment threshold, the environmental risk assessment result of the drinking water source to be assessed is judged to be high risk; When the comprehensive environmental risk assessment value of the drinking water source to be assessed is less than the comprehensive environmental risk assessment threshold, the environmental risk assessment result of the drinking water source to be assessed is judged to be low risk; The specific processing method for obtaining the comprehensive environmental risk assessment value of the drinking water source to be assessed is as follows: ； in, is the comprehensive environmental risk assessment value of the drinking water source to be assessed, is the potential pollution risk value of the drinking water source to be assessed, is the pollutant migration capacity value of the drinking water source to be assessed, is the environmental risk assessment range value of the drinking water source to be assessed, The function is the activation function, , The function is the activation function, , The function is the activation function, , the softplus function is a built-in function in Python, .

2. A drinking water source environmental risk assessment method according to claim 1, characterized in that: The obtaining of basic information of the drinking water source to be evaluated, processing and analyzing to generate basic characteristic values ​​of the drinking water source to be evaluated specifically includes: The basic information of the drinking water source to be assessed includes the area, average slope, average terrain height and magnitude of the population supplied by the drinking water source to be assessed; Extracting a basic information check value set from the database, including an area check value, an average slope check value, and an average terrain height check value; Based on the magnitude of the supply population of the drinking water source to be evaluated, mapping and matching are performed with the magnitude influencing factors of the supply population corresponding to each magnitude interval of the supply population pre-stored in the database to obtain the magnitude influencing factors of the supply population of the drinking water source to be evaluated; The basic information of the drinking water source to be evaluated, the basic information verification value set and the magnitude influencing factors of the supply population are comprehensively analyzed and processed to obtain the basic characteristic values ​​of the drinking water source to be evaluated; The basic characteristic values ​​of the drinking water source to be evaluated are used to characterize the importance of the drinking water source to be evaluated.

3. The method for assessing environmental risk of a drinking water source according to claim 1, characterized in that: The statistical meteorological information of the drinking water source to be evaluated and the joint analysis and processing to obtain the comprehensive characteristic value of the drinking water source to be evaluated include: The meteorological information of the drinking water source to be evaluated includes the average precipitation, average temperature and average wind speed within a set time period; Extract meteorological verification information of the water source to be evaluated from the database, including the average precipitation verification value, the average temperature verification value and the average wind speed verification value, and analyze and process them together with the meteorological information of the drinking water source to be evaluated to generate the meteorological impact factor of the drinking water source to be evaluated; Based on the basic characteristic values ​​and meteorological influencing factors of the drinking water source to be evaluated, the comprehensive characteristic values ​​of the drinking water source to be evaluated are jointly analyzed and processed; The comprehensive characteristic values ​​of the drinking water source to be evaluated are used to comprehensively characterize the geographical characteristics and meteorological characteristics of the drinking water source to be evaluated.

4. A drinking water source environmental risk assessment method according to claim 1, characterized in that: The remote sensing monitoring period of the drinking water source to be evaluated is obtained based on the comprehensive characteristic value matching of the drinking water source to be evaluated, and the hydrological monitoring of the drinking water source to be evaluated is performed to obtain hydrological data, specifically including: Based on the comprehensive characteristic value of the drinking water source to be evaluated, mapping and matching are performed with the remote sensing monitoring period corresponding to each comprehensive characteristic value interval pre-stored in the database to obtain the remote sensing monitoring period of the drinking water source to be evaluated; Based on the remote sensing monitoring period of the drinking water source to be evaluated, hydrological monitoring is performed on the drinking water source to be evaluated during the remote sensing monitoring period to obtain hydrological data of the drinking water source to be evaluated, wherein the hydrological data include the average water flow velocity of each remote sensing point, the water color change rate, and the water level height change rate of the drinking water source to be evaluated.

5. A drinking water source environmental risk assessment method according to claim 4, characterized in that: The processing analysis generates the pollutant migration capacity value of the drinking water source to be evaluated, specifically including: Extract the preset average water flow velocity assessment benchmark value, water body color change rate assessment benchmark value and water level height change rate assessment benchmark value from the database, and jointly analyze and process the average water flow velocity, water body color change rate and water level height change rate of each remote sensing point of the drinking water source to be assessed within the remote sensing monitoring period to obtain the pollutant migration capacity value of the drinking water source to be assessed; The pollutant migration capacity value of the drinking water source to be evaluated is used to characterize the self-purification capacity of the drinking water source to be evaluated.

6. The method for assessing environmental risk of a drinking water source according to claim 1, characterized in that: The comprehensive processing and analysis obtains the environmental risk assessment scope of the drinking water source to be assessed, including: Based on the pollutant migration capacity value of the drinking water source to be assessed, the environmental risk assessment range value corresponding to each pollutant migration capacity value interval pre-stored in the database is mapped and matched to obtain the environmental risk assessment range value of the drinking water source to be assessed; With the center point of the drinking water source to be assessed as the center of the circle and the environmental risk assessment range as the radius, the environmental risk assessment range of the drinking water source to be assessed is mapped.

7. A drinking water source environmental risk assessment system, using the drinking water source environmental risk assessment method according to any one of claims 1 to 6, characterized in that: include: The comprehensive characteristic evaluation module obtains the basic information of the drinking water source to be evaluated, processes and analyzes it to generate the basic characteristic values ​​of the drinking water source to be evaluated, and collects the meteorological information of the drinking water source to be evaluated, and jointly analyzes and processes it to obtain the comprehensive characteristic values ​​of the drinking water source to be evaluated; The pollutant migration capacity assessment module obtains the remote sensing monitoring period of the drinking water source to be assessed based on the comprehensive characteristic value matching of the drinking water source to be assessed, and performs hydrological monitoring on the drinking water source to be assessed to obtain hydrological data, and processes and analyzes the data to generate the pollutant migration capacity value of the drinking water source to be assessed; The environmental risk assessment scope generation module obtains the environmental risk assessment scope of the drinking water source to be assessed based on the comprehensive characteristic values ​​of the drinking water source to be assessed and the pollutant migration capacity values; Potential pollution risk assessment module, which identifies and compiles the pollution source activity data within the environmental risk assessment scope of the drinking water source to be assessed, and analyzes and processes to generate the potential pollution risk value of the drinking water source to be assessed; The environmental risk assessment module compares and analyzes the potential pollution risk value of the drinking water source to be assessed with the pollutant migration capacity value of the drinking water source to be assessed, and obtains the environmental risk assessment result of the drinking water source to be assessed.

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