Method and device for determining the importance of a water source area

Abstract

This invention provides a method and apparatus for determining the importance of water source areas. The method includes: determining the overall importance index of each water source area pixel in the target area based on population information of cities in the target area and local importance indices of all water source area pixels in the target area, wherein the local importance index is determined based on surface water production capacity information and water production change stability information of water source area pixels in cities; and determining the importance of each water source area based on the overall importance index of the water source area pixels contained in each water source area. This invention provides a method and apparatus for determining the importance of water source areas, realizing a quantitative analysis process for the importance of water source areas, and providing important support for the subsequent systematic management and decision-making of each water source area.

Description

Technical Field

[0001] This invention relates to the field of environmental science and technology, and in particular to a method and apparatus for determining the importance of a water source area. Background Technology

[0002] Urban water source areas, including the upstream basins of urban surface water intake points and the water resource replenishment areas of groundwater intake points, are key areas affecting the city's water resource security capacity and sustainable development.

[0003] Due to increased urban water demand, climate change in water source areas, and human disturbance, urban water source areas are facing unprecedented pressure, with urban water shortages and pollution problems becoming increasingly severe. How to quantify the importance of urban water source areas to support subsequent systematic management and decision-making is a crucial issue that urgently needs to be addressed by the industry. Summary of the Invention

[0004] This invention provides a method and apparatus for determining the importance of water source areas, which enables quantitative analysis of the importance of urban water source areas and provides support for the subsequent systematic management and decision-making of each water source area.

[0005] This invention provides a method for determining the importance of a water source area, comprising the following steps: Based on the population information of each city in the target area and the local importance index of all water source area pixels in the target area, the overall importance index of each water source area pixel in the target area is determined. The local importance index is determined based on the surface water production capacity information of water source area pixels in the city and the stability information of water production change of water source area pixels in the city. The target area includes multiple cities and multiple water source areas, and the water source area pixels are pixels within the spatial range of the water source area in the city. The importance of each water source area is determined based on the overall importance index of the water source area pixels contained in each water source area.

[0006] According to the method for determining the importance of a water source area provided by the present invention, the population information of each city includes the population of each city and the population of the city with the largest population among all cities.

[0007] According to a method for determining the importance of a water source area provided by the present invention, the overall importance index of each water source area pixel in the target area is: ; in, As an overall importance indicator, For the city's index, The number of all cities in the target region. and These are the spatial coordinates of the pixels in the water source area. For the water source area, like the city where it belongs Local importance indicators For the city population size The population of the most populous city among all cities.

[0008] According to a method for determining the importance of a water source area provided by the present invention, the local importance index of a water source area pixel in its city is: ; in, As a local importance indicator, For the city Information on the surface water production capacity of the central water source area. For the city Information on the stability of water production changes in pixels in the central water source area.

[0009] According to a method for determining the importance of a water source area provided by the present invention, the stability information of water production variation is as follows: ; in, For information on the stability of water production changes, For interannual stability information, This information pertains to stability throughout the year.

[0010] According to the method for determining the importance of a water source area provided by the present invention, the surface water production capacity information is as follows: ; in, Information on surface water production capacity, For the city The spatial range of the water source area The average annual surface water yield of the pixels in the water source area.

[0011] According to a method for determining the importance of a water source area provided by the present invention, after determining the importance of each water source area based on the overall importance index of the water source area pixels contained in each water source area, the method further includes: Based on the quantile method, the importance indicators of each water source area are classified to obtain the rating of each water source area in the target area. The rating of each water source area is used in the maintenance process of each water source area in the target area.

[0012] The present invention also provides a device for determining the importance of a water source area, comprising the following modules: The indicator analysis module is used to determine the overall importance index of each water source area pixel in the target area based on the population information of each city in the target area and the local importance index of all water source area pixels in the target area. The local importance index is determined based on the surface water production capacity information of water source area pixels in the city and the stability information of water production change of water source area pixels in the city. The target area includes multiple cities and multiple water source areas, and the water source area pixels are pixels within the spatial range of water source areas in the city. The importance determination module is used to determine the importance of each water source area based on the overall importance index of the water source area pixels contained in each water source area. The present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor executes the program to implement the method for determining the importance of a water source area as described above.

[0013] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method for determining the importance of a water source area as described above.

[0014] The method and apparatus for determining the importance of water source areas provided by this invention determine the overall importance index of each water source area pixel in the target area by using population information and the local importance index of all water source area pixels in the target area. Based on the overall importance index of the water source area pixels contained in each water source area, the importance of each water source area is determined. This comprehensively determines the spatial heterogeneity of the contribution of water source areas to urban water supply, realizes the quantitative analysis process of the importance of water source areas, and provides important support for the subsequent systematic management and decision-making of each water source area. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a flowchart illustrating the method for determining the importance of a water source area provided by the present invention.

[0017] Figure 2 This is a schematic diagram of the rating classification and determination process provided by the present invention.

[0018] Figure 3 This is a schematic diagram of the structure of the device for determining the importance of a water source area provided by the present invention.

[0019] Figure 4 This is a schematic diagram of the structure of the electronic device provided by the present invention. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0021] Figure 1 This is a flowchart illustrating the method for determining the importance of a water source area provided by the present invention, as shown below. Figure 1 As shown, the method includes the following: Step 110: Based on the population information of each city in the target area and the local importance index of all water source area pixels in the target area, determine the overall importance index of each water source area pixel in the target area. The local importance index is determined based on the surface water production capacity information of water source area pixels in the city and the stability information of water production change of water source area pixels in the city. The target area includes multiple cities and multiple water source areas, and the water source area pixels are pixels within the spatial range of water source areas in the city. Step 120: Determine the importance of each water source area based on the overall importance index of the water source area pixels contained in each water source area.

[0022] The method for determining the importance of a water source area provided by this invention can be implemented by an electronic device, a component within the electronic device, an integrated circuit, or a chip. The electronic device can be a mobile electronic device or a non-mobile electronic device. For example, a mobile electronic device can be a mobile phone, tablet computer, laptop computer, PDA, ultra-mobile personal computer (UMPC), netbook, or personal digital assistant (PDA), etc., while a non-mobile electronic device can be a server, network attached storage (NAS), or personal computer (PC), etc. This invention does not impose specific limitations.

[0023] The following describes the technical solution of the present invention in detail using the method for determining the importance of a water source area provided by the present invention, which is executed by a computer.

[0024] In step 110, based on the population information of each city in the target area and the local importance index of all water source area pixels in the target area, the overall importance index of each water source area pixel in the target area is determined. The local importance index is determined based on the surface water production capacity information of water source area pixels in the city and the stability information of water production change of water source area pixels in the city. The target area includes multiple cities and multiple water source areas, and the water source area pixels are pixels within the spatial range of water source areas in the city.

[0025] It should be noted that the target area is a spatial region with clearly defined boundaries. The target area includes multiple cities and multiple water source areas. A single water source area can supply water to one or more cities. Specifically, the target area can be the geographical area of ​​a province or the geographical area of ​​a country.

[0026] The water source area specifically includes the upstream basin of urban surface water intake points and the water resource replenishment area of ​​underground water intake points. It is a key area affecting the city's water resource security capacity and sustainable development.

[0027] A pixel is the smallest unit of analysis in remote sensing imagery or geospatial data, representing a homogeneous area of ​​a certain size on the Earth's surface (e.g., 30m × 30m). Each pixel has unique geographic coordinates and attribute values.

[0028] A water source area pixel is a pixel within the target area that has been designated as a water source functional zone, meaning that its spatial location or attributes are directly related to water source protection and water supply services.

[0029] First, the water source area pixels within each city are analyzed to determine the local importance index of the water source area pixels in each city. Then, based on the local importance index of the water source area pixels in each city, the local importance index of all water source area pixels in the target region is determined.

[0030] Specifically, the analysis is conducted on a city-by-city basis. For a given city, the local importance index of any water source area pixel within that city can be determined by the surface water production capacity information of the water source area pixels in the city and the stability information of the water production change of the water source area pixels in the city.

[0031] Specifically, surface water yield information is used to characterize the potential capacity to generate usable water resources, and can be determined based on the ratio of the multi-year average surface water yield of the pixel in the water source area to the sum of the multi-year average surface water yield of the city's water source areas.

[0032] Water production stability information is used to characterize the degree of fluctuation in water production of pixels in a water source area over time, reflecting the reliability and anti-interference capability of its water supply function, and can be determined based on water production stability indicators. These indicators specifically include interannual stability indicators and intra-annual stability indicators.

[0033] Among them, the interannual stability index is used to assess the water production stability of pixels in the water source area over multiple years. It reflects the degree of fluctuation in the water production of a pixel in the water source area between different years. Lower interannual variability means that the water production of the water source area changes less between different years, thus showing stronger performance in terms of water supply reliability and anti-interference ability.

[0034] The annual stability index measures the degree of water production fluctuation of pixels in the water source area within a year. It mainly reflects the water production fluctuation of the water source area in each month or year, and reveals whether there are significant seasonal fluctuations in the water source area within a year. Lower annual variability indicates that the water supply stability of the water source area is relatively high in different periods and has a strong anti-interference ability.

[0035] Interannual stability indicators focus on water production fluctuations over a yearly timescale, while intra-annual stability indicators focus on monthly or seasonal variations within a year. Both indicators reflect the stability of a water source area, helping to assess its long-term and short-term water supply capacity and resilience to disturbances.

[0036] After analyzing the water source area pixels of each city, the local importance index of all water source area pixels in the target area is determined. It should be noted that the target area consists of multiple cities. By analyzing the local importance index of the water source area pixels in each city of the target area, the local importance index of all water source area pixels in the target area can be obtained.

[0037] Based on the population information of each city in the target area and the local importance index of all water source area pixels in the target area, the overall importance index of each water source area pixel in the target area is determined.

[0038] It should be noted that a water source area is a water resource supply used to serve the population. A single water source area may supply water to one or more cities. The population information of these cities, especially their numbers, has a significant impact on the water supply from the water source area.

[0039] Therefore, based on the population information of each city and the local importance index of all water source area pixels in the target area, the overall importance of all water source area pixels in the target area can be determined.

[0040] Each city has a corresponding water supply area, also known as a water source area. Since water source areas typically supply water to multiple cities, there may be some spatial overlap between the water source areas of different cities. Therefore, the importance of water source areas is significant. It is related not only to its water supply capacity for a single city, but also closely related to its overall contribution to the entire water supply network. The overall importance index reflects the supply and demand relationship of each cell in the urban water supply network within the spatial range of all urban water source areas; that is, the greater the water supply and the greater the population demand, the higher the importance.

[0041] In step 120, the importance of each water source area is determined based on the overall importance index of the water source area pixels contained in each water source area.

[0042] After determining the overall importance index of each water source area pixel from the perspective of the target area as a whole, the water source area pixels contained in each water source area are determined.

[0043] The importance of each water source area can be determined based on the overall importance index of the water source area pixels contained in each water source area.

[0044] Understandably, for a water source area containing multiple water source area pixels, the overall importance index of these pixels can be superimposed to obtain the importance value of that water source area. Once the importance value of each water source area is determined, their importance can be ranked based on the magnitude of their respective importance values.

[0045] Furthermore, the quantile method can be used to divide all water source areas in the target area into five levels, and the water source areas with the highest scores (i.e., high and relatively high interference levels) can be defined as important water source areas.

[0046] The method for determining the importance of water source areas provided by this invention determines the overall importance index of each water source area pixel in the target area based on population information and the local importance index of all water source area pixels in the target area. Based on the overall importance index of the water source area pixels contained in each water source area, the importance of each water source area is determined. This comprehensively determines the spatial heterogeneity of the contribution of water source areas to urban water supply, realizes the quantitative analysis process of the importance of water source areas, and provides important support for the subsequent systematic management and decision-making of each water source area.

[0047] In one embodiment, the population information for each city includes the population of each city and the population of the most populous city among all cities.

[0048] Because water source areas supply water to multiple cities, the importance of water source areas is paramount. Its importance depends not only on its water supply capacity to a single city, but also on its overall contribution to the entire water supply network of the target area. This overall contribution can be determined by indicators of the local importance of multiple cities. The result is obtained through superposition calculation. Therefore, the overall importance index of each water source area pixel within the target area is: ; in, As an overall importance indicator, For the city's index, The number of all cities in the target region. and These are the spatial coordinates of the pixels in the water source area. For water source areas like Yuan is located in the city Local importance indicators For the city population size The population of the most populous city among all cities.

[0049] In one embodiment, the local importance index of a water source area pixel within its city is: ; in, As a local importance indicator, For the city Information on the surface water production capacity of the central water source area. For the city Information on the stability of water production changes in pixels in the central water source area.

[0050] Furthermore, the surface water production capacity information is as follows: ; in, Information on surface water production capacity, For the city The spatial range of the water source area The average annual surface water yield of the pixels in the water source area.

[0051] Precipitation, evapotranspiration, and surface water yield should be kept in balance. However, due to factors such as groundwater extraction and irrigation via river channels, the multi-year average evapotranspiration in some areas may exceed precipitation, resulting in a negative water yield value. To avoid the influence of these negative values, this paper calculates the multi-year average surface water yield of pixels. When the value is negative, set it to zero.

[0052] Based on monthly precipitation over many years and evapotranspiration Data to calculate annual surface water yield for each year. and multi-year average surface water yield The specific calculation formula is as follows: In the formula, and Representing pixels In the year No. Monthly precipitation and evapotranspiration This indicates the total number of years within the scope of the study.

[0053] To further assess the stability of surface water yield, a water yield stability index was adopted. This is used to measure the stability of changes in water production. Divided into interannual stability Stability within the year Based on years of climate data, annual surface water yield Average monthly surface water yield over many years They are used to calculate interannual stability. Stability within the year The specific calculation formula is as follows: In the formula, and Each pixel Annual surface water yield during the study period The maximum and minimum values, and Each pixel Average monthly surface water yield during the study period The maximum and minimum values.

[0054] In one embodiment, after determining the importance of each water source area based on the overall importance index of the water source area pixels contained in each water source area, the method further includes: classifying the importance index of each water source area based on the quantile method to obtain the rating of each water source area in the target area, and the rating of each water source area is used in the maintenance process of each water source area in the target area.

[0055] The quantile method analyzes the distribution characteristics of index values ​​and divides continuous data into discrete levels according to the principle of equal frequency, thereby achieving objective quantification and differentiated identification of the importance of water source areas.

[0056] Specifically, based on the importance indicators of each water source area, five levels of standards (extremely important / important / moderate / average / weak) can be divided according to preset quantiles (such as 20%, 40%, 60%, 80%) to ensure that each level contains a proportional number of samples and avoid extreme values ​​dominating the classification results; By calculating the quantile levels of indicators for each water source area and determining its final rating, a gradient system of "extremely important (Level I) → important (Level II) → moderate (Level III) → average (Level IV) → weak (Level V)" can be formed.

[0057] The specific rating and determination process for each water source area can be described as follows: Figure 2 The rating classification determination process provided by this invention is illustrated in the diagram.

[0058] First, based on the collected dataset and information, the water source areas within the target region are identified. The collected data may include water resource datasets, high-resolution hydrological datasets, and a list of important drinking water source areas.

[0059] After identifying multiple water source areas within the target region, the pixels representing these water source areas are analyzed city by city. Specifically, based on precipitation and evapotranspiration data, stability and water production capacity are analyzed to determine the surface water production capacity and stability of water production changes in water source area pixels within a city. This further determines the local importance of water source area pixels within a single city.

[0060] The local importance index of all water source area pixels in all cities (i.e., all water source area pixels in the target area) and the population information of each city in the target area are overlaid to calculate the overall importance index of water source area pixels contained in each water source area in the target area. Based on the overall importance index of water source area pixels contained in each water source area, the importance of each water source area is determined.

[0061] Based on the quantile method, the importance indicators of each water source area are classified to obtain the rating of each water source area in the target area.

[0062] The following describes the apparatus for determining the importance of a water source area provided by the present invention. The apparatus for determining the importance of a water source area described below can be referred to in correspondence with the method for determining the importance of a water source area described above.

[0063] like Figure 3 As shown, the device includes: The indicator analysis module 310 is used to determine the overall importance index of each water source area pixel in the target area based on the population information of each city in the target area and the local importance index of all water source area pixels in the target area. The local importance index is determined based on the surface water production capacity information of water source area pixels in the city and the stability information of water production change of water source area pixels in the city. The target area includes multiple cities and multiple water source areas, and the water source area pixels are pixels within the spatial range of water source areas in the city. Importance determination module 320 is used to determine the importance of each water source area based on the overall importance index of the water source area pixels contained in each water source area.

[0064] The method for determining the importance of water source areas provided by this invention determines the overall importance index of each water source area pixel in the target area based on population information and the local importance index of all water source area pixels in the target area. Based on the overall importance index of the water source area pixels contained in each water source area, the importance of each water source area is determined. This comprehensively determines the spatial heterogeneity of the contribution of water source areas to urban water supply, realizes the quantitative analysis process of the importance of water source areas, and provides important support for the subsequent systematic management and decision-making of each water source area.

[0065] In one embodiment, the indicator analysis module 310 is specifically used for: The population information for each city is determined, including the population of each city and the population of the city with the largest population among all cities.

[0066] In one embodiment, the indicator analysis module 310 is further specifically used for: The overall importance index for each water source area pixel in the target area is determined as follows: ; in, As an overall importance indicator, For the city's index, The number of all cities in the target region. and These are the spatial coordinates of the pixels in the water source area. For the water source area, like the city where it belongs Local importance indicators For the city population size This represents the population of the most populous city among all cities.

[0067] In one embodiment, the indicator analysis module 310 is further specifically used for: The local importance index for determining the location of the water source area pixels within their respective cities is as follows: ; in, As a local importance indicator, For the city Information on the surface water production capacity of the central water source area. For the city Information on the stability of water production changes in pixels in the central water source area.

[0068] In one embodiment, the indicator analysis module 310 is further specifically used for: The stability information of the water production rate change is determined as follows: ; in, For information on the stability of water production changes, For interannual stability information, This information pertains to stability throughout the year.

[0069] In one embodiment, the indicator analysis module 310 is further specifically used for: The surface water production capacity information is determined as follows: ; in, Information on surface water production capacity, For the city The spatial range of the water source area The average annual surface water yield of the pixels in the water source area.

[0070] In one embodiment, the importance determination module 320 is specifically used for: After determining the importance of each water source area based on the overall importance index of the water source area pixels contained in each water source area, the method further includes: Based on the quantile method, the importance indicators of each water source area are classified to obtain the rating of each water source area in the target area. The rating of each water source area is used in the maintenance process of each water source area in the target area.

[0071] Figure 4 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 4 As shown, the electronic device may include: a processor 410, a communications interface 420, a memory 430, and a communication bus 440, wherein the processor 410, the communications interface 420, and the memory 430 communicate with each other through the communication bus 440. The processor 410 can call logical instructions in the memory 430 to execute a method for determining the importance of water source areas. This method includes: determining the overall importance index of each water source area pixel in the target area based on population information of each city in the target area and the local importance index of all water source area pixels in the target area. The local importance index is determined based on the surface water production capacity information of water source area pixels in the city and the stability information of water production change of water source area pixels in the city. The target area includes multiple cities and multiple water source areas, and the water source area pixels are pixels within the spatial range of the water source areas in the city. The importance of each water source area is determined based on the overall importance index of the water source area pixels contained in each water source area.

[0072] Furthermore, the logical instructions in the aforementioned memory 430 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0073] On the other hand, the present invention also provides a computer program product, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the method for determining the importance of water source areas provided by the above methods. The method includes: determining the overall importance index of each water source area pixel in the target area based on the population information of each city in the target area and the local importance index of all water source area pixels in the target area. The local importance index is determined based on the surface water production capacity information of water source area pixels in the city and the stability information of water production change of water source area pixels in the city. The target area includes multiple cities and multiple water source areas, and the water source area pixels are pixels within the spatial range of water source areas in the city. The importance of each water source area is determined based on the overall importance index of the water source area pixels contained in each water source area.

[0074] In another aspect, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon. When executed by a processor, the computer program is implemented to perform the method for determining the importance of water source areas provided by the above methods. The method includes: determining the overall importance index of each water source area pixel in the target area based on population information of each city in the target area and local importance index of all water source area pixels in the target area. The local importance index is determined based on surface water production capacity information of water source area pixels in the city and water production change stability information of water source area pixels in the city. The target area includes multiple cities and multiple water source areas, and the water source area pixels are pixels within the spatial range of water source areas in the city. The importance of each water source area is determined based on the overall importance index of the water source area pixels contained in each water source area.

[0075] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0076] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for determining the importance of a water source area, characterized in that, include: Based on population information of cities in the target area and local importance indices of all water source area pixels in the target area, the overall importance index of each water source area pixel in the target area is determined. The local importance index is determined based on surface water production capacity information and water production change stability information of water source area pixels in the city. The target area includes multiple cities and multiple water source areas. The water source area pixels are pixels within the spatial range of the water source area in the city. The water source area includes the upstream watershed of the city's surface water intake point and the water resource recharge area of ​​the groundwater intake point. After identifying multiple water source areas within the target region, the pixels of the water source areas in each city are analyzed. Based on precipitation and evapotranspiration data, the stability and water production capacity are analyzed to determine the surface water production capacity information of the pixels of the water source areas in the city and the stability information of the water production change of the pixels of the water source areas in the city. The importance of each water source area is determined based on the overall importance index of the water source area pixels contained in each water source area. The population information for each city includes the population of each city and the population of the city with the largest population among all cities. The overall importance index of each water source area pixel in the target area is: ； in, As an overall importance indicator, For the city's index, The number of all cities in the target region. and These are the spatial coordinates of the pixels in the water source area. For the water source area, like the city where it belongs Local importance indicators For the city population size The population of the city with the largest population among all cities; The local importance index of the pixels in the water source area within their respective cities is: ； in, As a local importance indicator, For the city Information on the surface water production capacity of the central water source area. For the city Stability information on water yield changes in pixels within the central water source area; The surface water production capacity information is as follows: ； in, Information on surface water production capacity, For the city The spatial range of the water source area The average annual surface water yield of the pixels in the water source area.

2. The method for determining the importance of a water source area according to claim 1, characterized in that, The stability information regarding the change in water production is as follows: ； in, For information on the stability of water production changes, For interannual stability information, This is for stability information within the year.

3. The method for determining the importance of a water source area according to claim 1, characterized in that, After determining the importance of each water source area based on the overall importance index of the water source area pixels contained in each water source area, the method further includes: Based on the quantile method, the importance indicators of each water source area are classified to obtain the rating of each water source area in the target area. The rating of each water source area is used in the maintenance process of each water source area in the target area.

4. A device for determining the importance of a water source area, characterized in that, include: The indicator analysis module is used to determine the overall importance index of each water source area pixel in the target area based on the population information of each city in the target area and the local importance index of all water source area pixels in the target area. The local importance index is determined based on the surface water production capacity information and the stability information of water production change of water source area pixels in the city. The target area includes multiple cities and multiple water source areas. The water source area pixels are pixels within the spatial range of the water source area in the city. The water source area includes the upstream watershed of the city's surface water intake point and the water resource recharge area of ​​the groundwater intake point. After identifying multiple water source areas within the target region, the pixels of the water source areas in each city are analyzed. Based on precipitation and evapotranspiration data, the stability and water production capacity are analyzed to determine the surface water production capacity information of the pixels of the water source areas in the city and the stability information of the water production change of the pixels of the water source areas in the city. The importance determination module is used to determine the importance of each water source area based on the overall importance index of the water source area pixels contained in each water source area; The population information for each city includes the population of each city and the population of the city with the largest population among all cities. The overall importance index of each water source area pixel in the target area is: ； in, As an overall importance indicator, For the city's index, The number of all cities in the target region. and These are the spatial coordinates of the pixels in the water source area. For the water source area, like the city where it belongs Local importance indicators For the city population size The population of the city with the largest population among all cities; The local importance index of the pixels in the water source area within their respective cities is: ； in, As a local importance indicator, For the city Information on the surface water production capacity of the central water source area. For the city Stability information on water yield changes in pixels within the central water source area; The surface water production capacity information is as follows: ； in, Information on surface water production capacity, For the city The spatial range of the water source area The average annual surface water yield of the pixels in the water source area.

5. An electronic device comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that, When the processor executes the computer program, it implements the method for determining the importance of a water source area as described in any one of claims 1 to 3.

6. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the method for determining the importance of a water source area as described in any one of claims 1 to 3.

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