Lake and reservoir nitrogen and phosphorus sensitive area division method and device, medium and product

Abstract

The invention discloses a lake and reservoir nitrogen and phosphorus sensitive area division method and device, a medium and a product, and relates to the technical field of nitrogen and phosphorus sensitive area division, and the method comprises the steps: determining the type of an environment control unit of each minimum unit in a to-be-divided area; the to-be-divided areas are areas where lakes and reservoirs are located and upstream drainage basins, the minimum units are villages and towns, and the environment management and control units comprise a priority protection unit, a key management and control unit and a general management and control unit; determining the eutrophication risk level of each minimum unit in the to-be-divided region; based on the environment control unit type and the eutrophication risk level of each minimum unit, determining the type of a sensitive area corresponding to the minimum unit; and based on the type of the sensitive area of each minimum unit, carrying out sensitive area division on the to-be-divided area. According to the invention, division of high, middle and low nitrogen and phosphorus sensitive areas based on ecological environment zoning management and control and water eutrophication risk evaluation is realized.

Description

Technical Field

[0001] The present application relates to the technical field of nitrogen and phosphorus sensitive zone division, and in particular to a method, device, medium and product for dividing nitrogen and phosphorus sensitive zones of lakes and reservoirs. Background Art

[0002] Ecological and environmental spatial control refers to an environmental management system that implements zoning management and differentiated control based on the regional characteristics and protection requirements of the ecological environment. China's ecological and environmental spatial control has roughly gone through three stages, namely the exploration stage based on environmental factors, the development stage based on functional zoning, and the ecological and environmental zoning control stage with the implementation of ecological protection red lines, environmental quality bottom lines, resource utilization ceilings, and ecological and environmental access lists as the focus. At present, China's ecological and environmental zoning control is constantly advancing in terms of technology and informatization, developing an intelligent ecological and environmental zoning control system, and dynamically updating the "three lines and one list" control system. However, there is a lack of relevant practices for applying the results of ecological and environmental zoning control to the hierarchical control of typical environmental pollutants.

[0003] China has many lakes, and the eutrophication problem is particularly prominent. When lakes are severely eutrophic, "water blooms" and algal toxins are prone to occur, which damages the utilization of water resources and brings serious adverse consequences to the lake water environment and ecosystem. The nitrogen and phosphorus content in water bodies is one of the main causes of eutrophication. Generally, when the total nitrogen concentration in the water body exceeds 1.0 mg / L and the total phosphorus concentration exceeds 0.05 mg / L, the water body is considered to be in a state of mild eutrophication.

[0004] In order to effectively prevent and control the eutrophication of lake and reservoir water bodies and accurately control the nitrogen and phosphorus concentrations in water bodies, it is necessary to develop a method for dividing nitrogen and phosphorus sensitive areas of lakes and reservoirs based on ecological environment zoning control and water eutrophication risk assessment, and form three levels of nitrogen and phosphorus high, medium and low sensitive zones. Summary of the invention

[0005] The purpose of this application is to provide a method, device, medium and product for dividing nitrogen and phosphorus sensitive areas in lakes and reservoirs, which realizes the division of nitrogen and phosphorus into three levels of high, medium and low sensitive areas based on ecological environment zoning control and water eutrophication risk assessment.

[0006] To achieve the above objectives, this application provides the following solutions:

[0007] In the first aspect, the present application provides a method for dividing nitrogen and phosphorus sensitive areas of lakes and reservoirs, comprising:

[0008] Determine the type of environmental control unit for each smallest unit in the area to be divided; the area to be divided is the area where the lake is located and the upstream basin, the smallest unit is a township, and the types of environmental control units are: priority protection unit, key control unit and general control unit;

[0009] Determine the eutrophication risk level of each smallest unit in the area to be divided;

[0010] Based on the environmental control unit type and eutrophication risk level of each minimum unit, determine the type of sensitive area corresponding to the minimum unit; the sensitive area is a nitrogen-based sensitive area or a phosphorus-based sensitive area;

[0011] Based on the type of the sensitive area of ​​each minimum unit, the area to be divided is divided into sensitive areas.

[0012] Optionally, after dividing the to-be-divided area into sensitive areas based on the type of the sensitive area of ​​each minimum unit, the method further includes:

[0013] ArcGIS mapping software is used to draw a distribution map of the sensitive areas of the area to be divided according to the type of sensitive areas of each minimum unit.

[0014] Optionally, determining the type of the environment control unit of each minimum unit in the area to be divided includes:

[0015] Obtain the "three lines and one list" ecological environment zoning control plan for the area to be divided;

[0016] Determine the type of environmental control unit for each smallest unit in the area to be divided based on the "three lines and one list" ecological environment zoning control plan.

[0017] Optionally, determining the eutrophication risk level of each minimum unit in the area to be divided includes:

[0018] The probability statistics method is used to obtain the cumulative frequency of the current annual average nitrogen and phosphorus concentrations exceeding the eutrophication threshold of each minimum unit; the eutrophication threshold is the frequency value of 50% of the total nitrogen or the frequency value of 50% of the total phosphorus corresponding to 10 μg / L of chlorophyll a;

[0019] The eutrophication risk level of the corresponding minimum unit is determined based on the cumulative frequency of each minimum unit.

[0020] Optionally, determining the eutrophication risk level of the corresponding minimum unit based on the cumulative frequency of each minimum unit includes:

[0021] Determine any minimum unit as the current unit;

[0022] When the cumulative frequency of the current unit is between 0% and 20%, the eutrophication risk level of the current unit is determined as level three;

[0023] When the cumulative frequency of the current unit is between 21% and 80%, the eutrophication risk level of the current unit is determined as level 2;

[0024] When the cumulative frequency of the current unit is between 81% and 100%, the eutrophication risk level of the current unit is determined to be level one.

[0025] Optionally, based on the environmental control unit type and eutrophication risk level of each minimum unit, the type of sensitive area corresponding to the minimum unit is determined, including:

[0026] Determine any minimum unit as the current unit;

[0027] Determine a first score corresponding to the environment control unit type of the current unit;

[0028] Determine a second score corresponding to the eutrophication risk level of the current unit;

[0029] Add the first score and the second score of the current unit to obtain a superimposed score of the current unit;

[0030] The type of the sensitive area of ​​the current cell is determined based on the superposition score of the current cell.

[0031] Optionally, when the type of the environmental control unit is a priority protection unit, the first score is 3 points;

[0032] When the environmental control unit type is a key control unit, the first score is 2 points;

[0033] When the type of environmental control unit is a general control unit, the first score is 1 point;

[0034] When the eutrophication risk level is level one, the second score is 3 points;

[0035] When the eutrophication risk level is level 2, the second score is 2 points;

[0036] When the eutrophication risk level is level 3, the second score is 1 point;

[0037] When the superposition score is 5 or 6 points, the sensitive area is a high-sensitivity area;

[0038] When the superposition score is 4 points, the type of sensitive area is medium sensitive area;

[0039] When the superposition score is 2 or 3 points, the type of sensitive area is low sensitivity area.

[0040] In a second aspect, the present application provides a computer device comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement any of the above methods for dividing nitrogen and phosphorus sensitive areas of lakes and reservoirs.

[0041] In a third aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements any of the above-mentioned methods for dividing nitrogen and phosphorus sensitive areas of lakes and reservoirs.

[0042] In a fourth aspect, the present application provides a computer program product, including a computer program, which, when executed by a processor, implements any of the above-mentioned methods for dividing nitrogen and phosphorus sensitive areas of lakes and reservoirs.

[0043] According to the specific embodiments provided in this application, this application discloses the following technical effects:

[0044] The present application discloses a method, device, medium and product for dividing nitrogen and phosphorus sensitive areas of lakes and reservoirs. First, the type of environmental control unit of each minimum unit in the area to be divided is determined; the area to be divided is the area where the lake and reservoir are located and the upstream basin, the minimum unit is the township, and the types of environmental control units are: priority protection unit, key control unit and general control unit; then, the eutrophication risk level of each minimum unit in the area to be divided is determined; secondly, based on the type of environmental control unit and the eutrophication risk level of each minimum unit, the type of sensitive area corresponding to the minimum unit is determined; finally, based on the type of sensitive area of ​​each minimum unit, the area to be divided is divided into sensitive areas, thereby realizing the division of nitrogen and phosphorus into high, medium and low three-level sensitive areas based on ecological environment zoning control and water eutrophication risk assessment. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0046] Figure 1 A schematic diagram of a flow chart of a method for dividing nitrogen and phosphorus sensitive areas of lakes and reservoirs provided in an embodiment of the present application;

[0047] Figure 2 This is a distribution map of sensitive areas based on phosphorus;

[0048] Figure 3 A schematic diagram of the structure of a computer device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0050] The purpose of this application is to provide a method, device, medium and product for dividing nitrogen and phosphorus sensitive areas of lakes and reservoirs, aiming to realize the division of nitrogen and phosphorus into three levels of high, medium and low sensitive areas based on ecological environment zoning control and water eutrophication risk assessment.

[0051] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0052] In an exemplary embodiment, Figure 1 As shown, the method for dividing the nitrogen and phosphorus sensitive areas of lakes and reservoirs in this embodiment includes:

[0053] Step 1: Determine the type of environmental control unit for each minimum unit in the area to be divided.

[0054] Among them, the area to be divided is the area where the lake and reservoir are located and the upstream river basin, the smallest unit is the township, and the types of environmental control units are: priority protection unit, key control unit and general control unit.

[0055] As an optional implementation, step 1 includes:

[0056] Step 11: Obtain the “three lines and one list” ecological environment zoning control plan for the area to be divided.

[0057] Step 12: Determine the type of environmental control unit for each smallest unit in the area to be divided based on the “three lines and one list” ecological environment zoning control plan.

[0058] Specifically, after step 12, the method further includes: using ArcGIS mapping software to draw distribution maps of environmental control units of different categories, thereby obtaining vector maps of control units of different categories.

[0059] Step 2: Determine the eutrophication risk level of each smallest unit in the area to be divided.

[0060] As an optional implementation, step 2 includes:

[0061] Step 21: Use probability statistics to obtain the cumulative frequency of the current annual average nitrogen and phosphorus concentrations exceeding the eutrophication threshold for each minimum unit; the eutrophication threshold is the frequency value of 50% of total nitrogen or the frequency value of 50% of total phosphorus corresponding to chlorophyll a of 10 μg / L.

[0062] Specifically, according to the internationally recognized chlorophyll a content classification method: <1.6μg / L is oligotrophic; 1.6μg / L~10μg / L is mesotrophic; 10μg / L~26μg / L is light eutrophic; 26μg / L~64μg / L is medium eutrophic; 64μg / L~160μg / L is heavy eutrophic; >160μg / L is super eutrophic. The light eutrophic chlorophyll a concentration (10μg / L~26μg / L) is selected as the threshold of eutrophication, that is, when the chlorophyll a concentration in the lake water is higher than 10μg / L, the lake has reached a eutrophic state.

[0063] According to the chlorophyll a classification standard, we obtained the sample groups of total nitrogen and total phosphorus corresponding to different nutrient levels, and conducted frequency statistical analysis on each sample group. The frequency value of 50% of total nitrogen and 50% of total phosphorus corresponding to chlorophyll a of 10 μg / L were used as the eutrophication thresholds of lakes and reservoirs. The nitrogen and phosphorus thresholds of lakes and reservoirs can be divided into the nitrogen and phosphorus thresholds during the high-incidence period of algal blooms (March to October), the nitrogen and phosphorus thresholds in different seasons, and the nitrogen and phosphorus thresholds throughout the year.

[0064] Step 22: Determine the eutrophication risk level of the corresponding minimum unit based on the cumulative frequency of each minimum unit.

[0065] As an optional implementation, step 22 includes:

[0066] Step 221: Determine any minimum unit as the current unit.

[0067] Step 222: When the cumulative frequency of the current unit is between 0% and 20%, the eutrophication risk level of the current unit is determined to be level three.

[0068] Step 223: When the cumulative frequency of the current unit is between 21% and 80%, the eutrophication risk level of the current unit is determined to be level 2.

[0069] Step 224: When the cumulative frequency of the current unit is between 81% and 100%, the eutrophication risk level of the current unit is determined to be level one.

[0070] Specifically, the probability statistics method is used to analyze the cumulative frequency of the current annual average monthly (or seasonal) concentration of nitrogen and phosphorus exceeding the eutrophication threshold. The eutrophication risk of lakes and reservoirs is evaluated according to the cumulative frequency, and the risk level is divided into three levels.

[0071] Since eutrophication usually occurs in lakes, reservoir bays, backwater areas of rivers entering reservoirs, etc., the water bodies of rivers entering reservoirs have good fluidity and the probability of eutrophication is low. Usually, parameters such as chlorophyll a and transparency are not measured in rivers entering reservoirs. Therefore, for rivers entering lakes and reservoirs, the threshold-based nitrogen and phosphorus eutrophication risk assessment method can be used to refer to the total nitrogen and total phosphorus concentration limits corresponding to the lake and reservoir water quality management objectives, and the cumulative frequency of total nitrogen and total phosphorus concentrations exceeding the limit values ​​in rivers entering reservoirs can be statistically analyzed. The total nitrogen and total phosphorus concentration risk assessment is conducted according to the cumulative frequency, and the total nitrogen and total phosphorus concentration risk levels are divided into three levels. The eutrophication risk level evaluation table is shown in Table 1.

[0072] Table 1 Eutrophication risk level evaluation table

[0073] Serial number Cumulative frequency Eutrophication risk level 1 0～20％ Level 3 2 21％～80％ Level 2 3 81％～100％ Level 1

[0074] Step 3: Based on the environmental control unit type and eutrophication risk level of each minimum unit, determine the type of sensitive area corresponding to the minimum unit; the sensitive area is a nitrogen-based sensitive area or a phosphorus-based sensitive area.

[0075] As an optional implementation, step 3 includes:

[0076] Step 31: Determine any minimum unit as the current unit.

[0077] Step 32: Determine a first score corresponding to the environment control unit type of the current unit.

[0078] Step 33: Determine a second score corresponding to the eutrophication risk level of the current unit.

[0079] Step 34: Add the first score and the second score of the current unit to obtain the superimposed score of the current unit.

[0080] Step 35: Determine the type of the sensitive area of ​​the current unit based on the superposition score of the current unit.

[0081] As an optional implementation, when the environmental control unit type is a priority protection unit, the first score is 3 points.

[0082] When the environmental control unit type is a key control unit, the first score is 2 points.

[0083] When the environmental control unit type is a general control unit, the first score is 1 point.

[0084] When the eutrophication risk level is level one, the second score is 3 points.

[0085] When the eutrophication risk level is level 2, the second score is 2 points.

[0086] When the eutrophication risk level is Level 3, the second score is 1 point.

[0087] When the superposition score is 5 or 6 points, the type of sensitive area is a high-sensitivity area.

[0088] When the superposition score is 4 points, the type of sensitive area is a medium sensitive area.

[0089] When the superposition score is 2 or 3 points, the type of sensitive area is low sensitivity area.

[0090] Specifically, based on the environmental control unit type (three levels) and the nitrogen and phosphorus eutrophication risk level (three levels), a matrix analysis was conducted on the spatial control zones and nitrogen and phosphorus eutrophication risk levels (matrix analysis is to arrange and combine the three levels of spatial control zones with the three nitrogen and phosphorus eutrophication risk levels for division). Priority protection units, key control units, and general control units were assigned 3 points, 2 points, and 1 point, respectively. The first, second, and third levels of nitrogen and phosphorus eutrophication risk levels were assigned 3 points, 2 points, and 1 point, respectively. Areas with a superimposed score ≥5 points were classified as highly sensitive areas, areas with a superimposed score equal to 4 points were classified as medium sensitive areas, and areas with a superimposed score ≤3 points were classified as low sensitive areas. See Table 2 for details.

[0091] Table 2 Classification of nitrogen and phosphorus sensitive areas of lakes and reservoirs

[0092]

[0093] Step 4: Based on the type of sensitive area of ​​each minimum unit, the area to be divided is divided into sensitive areas.

[0094] As an optional implementation manner, after step 4, the method further includes:

[0095] Step 5: Use ArcGIS mapping software to draw a sensitive area distribution map of the area to be divided according to the type of sensitive area of ​​each minimum unit.

[0096] Specifically, the distribution map of phosphorus-sensitive areas in the Danjiangkou Reservoir area and its upstream basin is as follows: Figure 2 shown.

[0097] In an exemplary embodiment, a computer device is provided, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement a method for dividing nitrogen and phosphorus sensitive areas of lakes and reservoirs.

[0098] In an exemplary embodiment, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, a method for dividing nitrogen and phosphorus sensitive areas of lakes and reservoirs is implemented.

[0099] In an exemplary embodiment, a computer program product is provided, including a computer program, which, when executed by a processor, implements a method for dividing nitrogen and phosphorus sensitive areas of lakes and reservoirs.

[0100] In an exemplary embodiment, a computer device is provided. The computer device may be a server or a terminal. The internal structure diagram thereof may be as follows: Figure 3 As shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, referred to as I / O) and a communication interface. The processor, the memory and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a method for dividing nitrogen and phosphorus sensitive areas of lakes and reservoirs is implemented.

[0101] Those skilled in the art will understand that Figure 3 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0102] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0103] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM may be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0104] The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. The non-relational database may include a distributed database based on blockchain, etc., but is not limited thereto. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but is not limited thereto.

[0105] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0106] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. At the same time, for those skilled in the art, according to the ideas of this application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. A method for dividing nitrogen and phosphorus sensitive areas of lakes and reservoirs, characterized in that: The method for dividing the nitrogen and phosphorus sensitive areas of lakes and reservoirs includes: Determine the type of environmental control unit for each smallest unit in the area to be divided; the area to be divided is the area where the lake is located and the upstream basin, the smallest unit is a township, and the types of environmental control units are: priority protection unit, key control unit and general control unit; Determine the eutrophication risk level of each smallest unit in the area to be divided; Based on the environmental control unit type and eutrophication risk level of each minimum unit, determine the type of sensitive area corresponding to the minimum unit; the sensitive area is a nitrogen-based sensitive area or a phosphorus-based sensitive area; Based on the type of the sensitive area of ​​each minimum unit, the area to be divided is divided into sensitive areas.

2. The method for dividing nitrogen and phosphorus sensitive areas of lakes and reservoirs according to claim 1 is characterized in that: After dividing the area to be divided into sensitive areas based on the type of the sensitive area of ​​each minimum unit, the method further includes: ArcGIS mapping software is used to draw a sensitive area distribution map of the area to be divided according to the type of sensitive area of ​​each minimum unit.

3. The method for dividing nitrogen and phosphorus sensitive areas of lakes and reservoirs according to claim 1 is characterized in that: Determine the type of environmental control unit for each minimum unit in the area to be divided, including: Obtain the "three lines and one list" ecological environment zoning control plan for the area to be divided; Determine the type of environmental control unit for each smallest unit in the area to be divided based on the "three lines and one list" ecological environment zoning control plan.

4. The method for dividing nitrogen and phosphorus sensitive areas of lakes and reservoirs according to claim 1 is characterized in that: Determine the eutrophication risk level of each smallest unit in the area to be divided, including: The probability statistics method is used to obtain the cumulative frequency of the current annual average nitrogen and phosphorus concentrations exceeding the eutrophication threshold of each minimum unit; the eutrophication threshold is the frequency value of 50% of the total nitrogen or the frequency value of 50% of the total phosphorus corresponding to 10 μg / L of chlorophyll a; The eutrophication risk level of the corresponding minimum unit is determined based on the cumulative frequency of each minimum unit.

5. The method for dividing nitrogen and phosphorus sensitive areas of lakes and reservoirs according to claim 4 is characterized in that: The eutrophication risk level of the corresponding minimum unit is determined based on the cumulative frequency of each minimum unit, including: Determine any minimum unit as the current unit; When the cumulative frequency of the current unit is between 0% and 20%, the eutrophication risk level of the current unit is determined as level three; When the cumulative frequency of the current unit is between 21% and 80%, the eutrophication risk level of the current unit is determined as level 2; When the cumulative frequency of the current unit is between 81% and 100%, the eutrophication risk level of the current unit is determined to be level one.

6. The method for dividing nitrogen and phosphorus sensitive areas of lakes and reservoirs according to claim 1 is characterized in that: Based on the environmental control unit type and eutrophication risk level of each minimum unit, the type of sensitive area corresponding to the minimum unit is determined, including: Determine any minimum unit as the current unit; Determine a first score corresponding to the environment control unit type of the current unit; Determine a second score corresponding to the eutrophication risk level of the current unit; Add the first score and the second score of the current unit to obtain a superimposed score of the current unit; The type of the sensitive area of ​​the current cell is determined based on the superposition score of the current cell.

7. The method for dividing nitrogen and phosphorus sensitive areas of lakes and reservoirs according to claim 6 is characterized in that: When the type of environmental control unit is a priority protection unit, the first score is 3 points; When the environmental control unit type is a key control unit, the first score is 2 points; When the type of environmental control unit is a general control unit, the first score is 1 point; When the eutrophication risk level is level one, the second score is 3 points; When the eutrophication risk level is level 2, the second score is 2 points; When the eutrophication risk level is level 3, the second score is 1 point; When the superposition score is 5 or 6 points, the sensitive area is a high-sensitivity area; When the superposition score is 4 points, the type of sensitive area is medium sensitive area; When the superposition score is 2 or 3 points, the type of sensitive area is low sensitivity area.

8. A computer device comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method for dividing nitrogen and phosphorus sensitive areas of lakes and reservoirs as described in any one of claims 1 to 7.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, it implements the method for dividing nitrogen and phosphorus sensitive areas of lakes and reservoirs as described in any one of claims 1-7.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, it implements the method for dividing nitrogen and phosphorus sensitive areas of lakes and reservoirs as described in any one of claims 1-7.

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