Urban green infrastructure classification and evaluation method and device, medium and product

Abstract

The invention discloses an urban green infrastructure classification and evaluation method and device, a medium and a product, and relates to the technical field of urban infrastructure classification, and the method comprises the steps: obtaining a mapping result of an urban green infrastructure and an actual demand of a user; the evaluation indexes corresponding to the first demand comprise an urban green infrastructure coverage rate and an urban and rural green infrastructure coverage rate, and the evaluation indexes corresponding to the second demand comprise an overall coverage rate, a green exposure level and an overall per capita green exposure level of various green infrastructures in each administrative division; and integrating all the evaluation indexes to obtain an urban green infrastructure summary sheet, thereby performing urban green infrastructure level evaluation of each administrative division and comparison between the administrative divisions. According to the invention, urban green infrastructure classification and evaluation facing ecological system service and biodiversity evaluation are realized.

Description

Technical Field

[0001] The present application relates to the technical field of urban facility classification, and in particular to a method, device, medium and product for classifying and evaluating urban green infrastructure. Background Art

[0002] Urban green infrastructure lacks a unified and integrated classification system. The existing urban green space classification system lacks some important green space types, making it difficult to form a supporting urban infrastructure system with blue infrastructure and grey infrastructure. In order to give full play to the social, economic and ecological benefits of urban green infrastructure, a set of corresponding targeted evaluation indicators is needed. However, the design of the current urban green space calculation indicators does not take into account the particularities of different ecosystem services and biodiversity, making it difficult to directly apply them to the evaluation of urban green infrastructure. Summary of the invention

[0003] The purpose of this application is to provide a method, device, medium and product for the classification and evaluation of urban green infrastructure, which realizes the classification and evaluation of urban green infrastructure for ecosystem service and biodiversity assessment.

[0004] To achieve the above objectives, this application provides the following solutions:

[0005] In the first aspect, this application provides a classification and evaluation method for urban green infrastructure, including:

[0006] Obtaining the mapping results of urban green infrastructure and the actual needs of users; the actual needs are the first needs or the second needs, the first need is to conduct statistics on the level of urban green infrastructure construction, and the second need is to conduct an assessment of the urban green infrastructure's ability to support ecosystem services and biodiversity;

[0007] Based on the mapping results of urban green infrastructure, the evaluation indicators corresponding to the actual needs are calculated; the evaluation indicators corresponding to the first needs include: urban green infrastructure coverage rate and urban-rural green infrastructure coverage rate; the evaluation indicators corresponding to the second needs include: the overall coverage of various types of green infrastructure in each administrative division, the green exposure level and the overall per capita green exposure level;

[0008] All evaluation indicators are integrated to obtain a summary table of urban green infrastructure, so as to evaluate the level of urban green infrastructure in each administrative division and compare between administrative divisions.

[0009] Optionally, obtain mapping results of the city's green infrastructure, including:

[0010] Obtain an initial urban green infrastructure classification table;

[0011] Adjust and add categories of urban green infrastructure in the initial urban green infrastructure classification table to obtain a target urban green infrastructure classification table;

[0012] Drawing is performed based on the target city green infrastructure classification table to obtain a mapping result of the city's green infrastructure.

[0013] Optionally, new and adjusted categories include: G136 theme park, G137 wetland park, G138 forest park, TG urban farmland, GR green roof, GW green exterior wall, GP green parking lot, BG balcony greening, SG sponge city facilities, ZG urban wilderness, CG suburban cultivated land and NG natural wilderness.

[0014] Optionally, when the actual demand is the first demand, the evaluation index corresponding to the first demand is calculated based on the mapping results of the urban green infrastructure using the first indicator calculation formula; the first indicator calculation formula includes: the urban green infrastructure coverage rate calculation formula and the urban-rural green infrastructure coverage rate calculation formula.

[0015] Optionally, the urban green infrastructure coverage rate calculation formula is:

[0016]

[0017] Among them, λ g is the coverage rate of urban green infrastructure, in %; A g1 is the park green area, in square meters; A g2 A is the area of ​​protective green space, in square meters; g3' A is the green area of ​​the square, in square meters; xg A is the area of ​​the attached green space, in square meters; tg is the urban farmland area, in square meters; A gr' A is the green roof area within the boundary of urban construction land, in square meters; gw' A is the green exterior wall area within the boundary of urban construction land, in square meters; gp' A is the green parking area within the boundary of urban construction land, in square meters; bg' It is the green area of ​​​​balconies within the boundary of urban construction land, in square meters; A sg' A is the area of ​​sponge city facilities within the boundary of urban construction land, in square meters; zg is the urban wilderness area, in square meters; A c is the land area of ​​the city, in square meters;

[0018] The calculation formula for the coverage rate of urban and rural green infrastructure is:

[0019]

[0020] Among them, λ G is the coverage rate of urban and rural green infrastructure, in %; A gr is the green roof area, in square meters; A gw is the green exterior wall area, in square meters; A gp is the green parking lot area, in square meters; A bg is the green area of ​​the balcony, in square meters; A sg A is the area of ​​sponge city facilities, in square meters; eg is the area of ​​regional green space, in square meters; A cg is the suburban cultivated land area, in square meters; A ng is the natural wilderness area, in square meters; A c It refers to the urban and rural land area in square meters.

[0021] Optionally, when the actual demand is the second demand, the evaluation index corresponding to the second demand is calculated based on the mapping results of the urban green infrastructure and using the second indicator calculation formula; the second indicator calculation formula includes: the overall coverage calculation formula, the green exposure level calculation formula and the overall per capita green exposure level calculation formula.

[0022] Optionally, the overall coverage calculation formula is:

[0023]

[0024] Among them, GC j G is the overall coverage of the jth type of green infrastructure within an administrative region; ij is the coverage of the jth type of green infrastructure in the ith analysis unit within the administrative division; n is the total number of analysis units within the administrative division;

[0025] The green exposure level calculation formula is:

[0026]

[0027] Among them, GE j is the green exposure level of the jth type of green infrastructure in an administrative region; p i is the total population of the ith analysis unit within the administrative division; G ij The coverage of the jth type of green infrastructure within the preset radius buffer range is calculated with the centroid of the i-th analysis unit in the administrative division as the center point;

[0028] The calculation formula for the overall per capita green exposure level is:

[0029]

[0030] Among them, percap_GE j G is the overall per capita green exposure level of the jth type of green infrastructure in an administrative region; ij The coverage of the jth type of green infrastructure within the preset radius buffer range is taken as the center point of the centroid of the i-th analysis unit in the administrative division.

[0031] 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-described urban green infrastructure classification and evaluation methods.

[0032] 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 urban green infrastructure classification and evaluation methods.

[0033] 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 urban green infrastructure classification and evaluation methods.

[0034] According to the specific embodiments provided in this application, this application discloses the following technical effects:

[0035] This application discloses a method, device, medium and product for classifying and evaluating urban green infrastructure, and the classification categories of urban green infrastructure are more complete. On the one hand, the category of "G139 Other Special Parks" in the "Urban Green Space Classification Standard" (CJJ / T 85-2017) was adjusted, and the original vague definition was expanded to G136 Theme Park, G137 Wetland Park, and G138 Forest Park, so that these subcategories can better indicate different ecosystem services and biodiversity benefits; on the other hand, new categories were added, including TG Urban Farmland, GR Green Roof, GW Green Exterior Wall, GP Green Parking Lot, BG Balcony Greening, SG Sponge City Facilities, ZG Urban Wilderness, CG Suburban Cultivated Land, and NG Natural Wilderness. These categories widely cover the current international and Chinese new urban green space planning and landscape ecological design methods, and meet the current needs of China's urban infrastructure construction to "coordinate the increase and stock, the traditional and the new". For example, urban green infrastructure such as green roofs, green exterior walls, green parking lots, and balcony greening can be built and improved in a point-like manner in high-density urban construction land, and form a paradigm for urban green infrastructure stock planning from point to surface. Based on this systematic classification system, the planning and construction of urban green infrastructure will be able to support and integrate into the overall urban planning to a greater extent. The evaluation indicators are more targeted and can better serve the evaluation and monitoring of social, economic and ecological benefits. In addition to referring to the existing indicators with statistical purposes in the "Urban Green Space Classification Standard" (CJJ / T 85-2017), more targeted evaluation indicators have been designed for urban green infrastructure. The newly defined evaluation indicators further consider the particularity of the actual population distribution in the benefits related to human well-being, and design the green exposure level index of urban green infrastructure and the per capita green exposure level index. The calculation of these two indicators can depict more realistic and relevant parameters for how urban green infrastructure provides recreational services for urban residents; for the evaluation and monitoring of ecosystem health, it is recommended to measure the overall coverage index of urban green infrastructure; and finally integrate the evaluation indicators into the summary table. Based on this targeted assessment method, each city or specific administrative division can more clearly carry out statistics and evaluation of urban green infrastructure, and make the calculation of indicators more scientific to serve the assessment and monitoring of the multiple benefits of ecosystem services and biodiversity. At the same time, it can use this as a unified assessment framework to summarize and compare urban green infrastructure between regions, and provide a reference for its planning, construction and management optimization. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] 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.

[0037] Figure 1 A schematic diagram of a process flow of a method for classifying and evaluating urban green infrastructure provided in one embodiment of the present application;

[0038] Figure 2 A schematic diagram of the structure of a computer device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0039] 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.

[0040] The purpose of this application is to provide a method, device, medium and product for the classification and evaluation of urban green infrastructure, aiming to achieve the classification and evaluation of urban green infrastructure for ecosystem service and biodiversity assessment.

[0041] The concept of green infrastructure was introduced to China around 2000, and subsequently a large number of theoretical and academic research, as well as local practice projects, gradually emerged. Internationally, the research and practice of green infrastructure is typically characterized by the coordinated development of multiple fields and the wide dissemination of multiple regions.

[0042] China's planning and practice in green infrastructure lags behind in time. At the same time, some related concepts already have clear national standards or industry standards. It is necessary to first clarify these existing standards and refer to international experience extensively to identify the current development gaps in China's theory and practice in the field of green infrastructure.

[0043] 1. Urban Green Space (UGS):

[0044] According to the "Urban Green Space Classification Standard" (CJJ / T 85-2017) and "Urban Green Space Planning Standard" (GB / T51346-2019) issued by the Ministry of Housing and Urban-Rural Development of the People's Republic of China, "urban green space" refers to the general term for various types of green spaces in cities that use vegetation as the main form and have a positive effect on ecology, recreation, landscape, and protection.

[0045] 2. Nature-based Solution (NbS):

[0046] The concept of NbS was first formally proposed by the World Bank in 2008, and was later introduced and defined by the World Conservation Union (IUCN) in the United Nations Framework Convention on Climate Change in 2009. "Nature-based solutions" refer to actions to protect, sustainably use and restore natural or modified ecosystems, thereby effectively and adaptively responding to the challenges facing today's society while providing human well-being and biodiversity.

[0047] China does not yet have standards and regulations for nature-based solutions.

[0048] 3. Sponge City and Low Impact Development:

[0049] According to the "Sponge City Construction Evaluation Standard" (GB / T51345-2018) and "Sponge City Construction Technical Guide - Low Impact Development Rainwater System Construction (Trial)" issued by the Ministry of Housing and Urban-Rural Development of the People's Republic of China, "sponge city" refers to the management and control of urban planning and construction, starting from "source emission reduction, process control, and system governance", and comprehensively adopting technical measures such as "infiltration, retention, storage, purification, use, and discharge" to coordinate the relationship between water quantity and water quality, ecology and safety, distribution and concentration, green and gray, landscape and function, onshore and offshore, above ground and underground, effectively control urban rainfall runoff, and minimize the damage caused by urban development and construction to the original natural hydrological characteristics and water ecological environment, so that the city can be like a "sponge", with good "elasticity" in adapting to environmental changes and resisting natural disasters, and realize the urban development mode of natural accumulation, natural infiltration, and natural purification, which is conducive to achieving the multiple goals of repairing urban water ecology, conserving urban water resources, improving urban water environment, ensuring urban water safety, and reviving urban water culture.

[0050] "Low Impact Development" (LID) refers to the use of source and decentralized measures to maintain the hydrological characteristics of the site before development during the site development process. It is also called low impact design (LID) or low impact urban design and development (LIUDD).

[0051] (IV) Urban Green Infrastructure (UGI):

[0052] The concept of green infrastructure (GI) was formally proposed by the U.S. Conservation Fund and the U.S. Department of Agriculture Forest Service in 1999. It refers to the strategic planning, creation and management of interconnected green space networks in urban environments to provide considerable ecological, social and economic benefits. GI is often considered a key carrier for the implementation of NbS in cities.

[0053] China does not yet have standards and regulations for urban green infrastructure.

[0054] China has formulated relevant standards for classification, planning and construction of urban green space, sponge city and low-impact development, but there is still no clear and unified implementation plan for urban green infrastructure. However, urban green infrastructure should be regarded as an integrated concept of urban green space and sponge city related facilities, and as an effective planning tool to achieve NbS goals, so as to exert its extensive social, economic and ecological benefits.

[0055] The Urban Green Space Classification Standard (CJJ / T 85-2017) defines four urban green space calculation indicators: green space ratio, per capita green space area, per capita park green space area, and urban-rural green space ratio. These indicators mainly consider the nature of urban land use, urban green space planning, and urban master planning. However, the ultimate goal of urban green space planning and construction is to provide ecosystem supply, regulation, support, cultural services, and maintain biodiversity. These different benefits are related to different dimensions of urban green space. For example, benefits related to ecosystem health (including organic matter supply, runoff regulation, air purification, soil conservation, biodiversity conservation, etc.) are related to the area and coverage of green space, while benefits related to human well-being (ecosystem cultural services) are further closely related to population distribution. This means that in order to better match the assessment of ecosystem services and biodiversity, targeted green space calculation indicator design is needed.

[0056] The concept of "urban green infrastructure" is used to integrate various green spaces in the city, which together with blue infrastructure (water bodies) and grey infrastructure (municipal facilities such as roads and bridges) form an urban infrastructure system, which helps to clearly divide various types of facilities and thus facilitate orderly urban planning.

[0057] The "14th Five-Year Plan for National Urban Infrastructure Construction" compiled by the Ministry of Housing and Urban-Rural Development, the National Development and Reform Commission and other relevant departments clearly pointed out that urban infrastructure construction during the "14th Five-Year Plan" should "coordinate the coordinated development of system and local, stock and incremental, construction and management, gray and green, traditional and new urban infrastructure, and promote the systematic construction of urban infrastructure." The field of urban green infrastructure urgently needs a classification system and evaluation method based on the "Urban Green Space Classification Standard" and improved and expanded. This application is aimed at two main issues:

[0058] (1) Urban green infrastructure lacks a unified and integrated classification system. The existing urban green space classification system lacks some important green space types, making it difficult to form a supporting urban infrastructure system with blue infrastructure and grey infrastructure.

[0059] (2) In order to give full play to the social, economic and ecological benefits of urban green infrastructure, a set of corresponding targeted evaluation indicators is needed. However, the current design of urban green space calculation indicators does not take into account the particularities of different ecosystem services and biodiversity, and it is difficult to directly apply them to the evaluation of urban green infrastructure.

[0060] Accordingly, the objectives to be addressed in this application include:

[0061] (1) Propose a well-defined, universal urban green infrastructure classification system that complies with other relevant standards and specifications in China, so that it can be applied to the planning, design, construction, statistics, evaluation, monitoring, management and optimization of green infrastructure.

[0062] (2) Propose a set of evaluation indicators based on urban green infrastructure to solve the statistical problems of urban green infrastructure from the perspective of urban land use and urban master planning, as well as the evaluation problems of urban green infrastructure from the perspective of benefits, so that this targeted indicator design can support the evaluation and monitoring of various social, economic and ecological benefits such as ecosystem services and biodiversity.

[0063] 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.

[0064] In an exemplary embodiment, Figure 1 As shown, the urban green infrastructure classification and evaluation method in this embodiment includes:

[0065] Step 1: Obtain the mapping results of urban green infrastructure and the actual needs of users.

[0066] The actual demand is either the first demand or the second demand. The first demand is to conduct statistics on the level of urban green infrastructure construction, and the second demand is to evaluate the ability of urban green infrastructure to support ecosystem services and biodiversity.

[0067] As an optional implementation, the step 1 of obtaining the mapping result of the urban green infrastructure includes:

[0068] Step 11: Obtain the initial urban green infrastructure classification table.

[0069] Specifically, based on the Urban Green Space Classification Standard (CJJ / T 85-2017), an initial urban green infrastructure classification table was obtained.

[0070] Step 12: Adjust and add categories of urban green infrastructure in the initial urban green infrastructure classification table to obtain the target urban green infrastructure classification table.

[0071] Specifically, the classification table of green infrastructure in target cities is shown in Table 1.

[0072] Table 1 Classification of green infrastructure in target cities

[0073]

[0074]

[0075]

[0076]

[0077]

[0078] Step 13: Draw a map based on the target city’s green infrastructure classification table to obtain the city’s green infrastructure mapping results.

[0079] As an optional implementation method, the newly added and adjusted categories include: G136 theme park, G137 wetland park, G138 forest park, TG urban farmland, GR green roof, GW green exterior wall, GP green parking lot, BG balcony greening, SG sponge city facilities, ZG urban wilderness, CG suburban cultivated land and NG natural wilderness.

[0080] Step 2: Based on the mapping results of urban green infrastructure, calculate the evaluation indicators corresponding to actual needs.

[0081] The evaluation indicators corresponding to the first demand include: urban green infrastructure coverage rate and urban-rural green infrastructure coverage rate; the evaluation indicators corresponding to the second demand include: the overall coverage of various types of green infrastructure within each administrative region, the green exposure level and the overall per capita green exposure level.

[0082] Specifically, the calculation of all indicators should follow the following principles: ① When calculating the indicators of existing green infrastructure and planned green infrastructure, the corresponding population data and land use data should be used respectively; ② The planning period, urban construction land area, and population statistical caliber should be consistent with the city's overall plan and be summarized and calculated in a unified manner; ③ The land area should be calculated according to plane projection, and each piece of land should only be calculated once; ④ The drawing scale, calculation unit, and statistical accuracy used in the land use calculation should be consistent with the requirements of the corresponding stage of urban planning.

[0083] As an optional implementation, when the actual demand is the first demand, the evaluation index corresponding to the first demand is calculated based on the mapping results of the urban green infrastructure using the first indicator calculation formula; the first indicator calculation formula includes: the urban green infrastructure coverage rate calculation formula and the urban-rural green infrastructure coverage rate calculation formula.

[0084] As an optional implementation method, the urban green infrastructure coverage rate calculation formula is:

[0085]

[0086] Among them, λ g is the coverage rate of urban green infrastructure, in %; A g1 is the park green area, in square meters; A g2 A is the area of ​​protective green space, in square meters; g3' A is the green area of ​​the square, in square meters; xg A is the area of ​​the attached green space, in square meters; tg is the urban farmland area, in square meters; A gr' A is the green roof area within the boundary of urban construction land, in square meters; gw' A is the green exterior wall area within the boundary of urban construction land, in square meters; gp' A is the green parking area within the boundary of urban construction land, in square meters; bg' It is the green area of ​​​​balconies within the boundary of urban construction land, in square meters; A sg' A is the area of ​​sponge city facilities within the boundary of urban construction land, in square meters; zg is the urban wilderness area, in square meters; A c It is the land area of ​​the city in square meters.

[0087] The calculation formula for urban and rural green infrastructure coverage is:

[0088]

[0089] Among them, λ G is the coverage rate of urban and rural green infrastructure, in %; A gr is the green roof area, in square meters; A gw is the green exterior wall area, in square meters; A gp is the green parking lot area, in square meters; A bg is the green area of ​​the balcony, in square meters; A sg A is the area of ​​sponge city facilities, in square meters; eg is the area of ​​regional green space, in square meters; A cg is the suburban cultivated land area, in square meters; A ng is the natural wilderness area, in square meters; A c It refers to the urban and rural land area in square meters.

[0090] As an optional implementation, when the actual demand is the second demand, the evaluation index corresponding to the second demand is calculated based on the mapping results of the urban green infrastructure using the second indicator calculation formula; the second indicator calculation formula includes: the overall coverage calculation formula, the green exposure level calculation formula and the overall per capita green exposure level calculation formula.

[0091] As an optional implementation method, when it is necessary to evaluate the ability of urban green infrastructure to support ecosystem services and biodiversity, it is necessary to select corresponding evaluation indicators based on the target objects of the ecosystem services / biodiversity to be evaluated. Specifically, when it is necessary to evaluate indicators related to ecosystem health (such as runoff, soil fertility, temperature, air quality, biodiversity, etc.), calculate the coverage of each green infrastructure; when it is necessary to evaluate indicators related to human well-being (such as ecosystem cultural services such as recreation and entertainment), use population weighting to portray a more realistic green exposure level of various types of green infrastructure; further, in order to analyze the per capita enjoyment of green infrastructure, calculate the per capita exposure level. The overall coverage calculation formula is;

[0092]

[0093] Among them, GC j G is the overall coverage of the jth type of green infrastructure within an administrative region; ij is the coverage of the jth type of green infrastructure in the ith analysis unit within the administrative division; n is the total number of analysis units within the administrative division.

[0094] The green exposure level calculation formula is;

[0095]

[0096] Among them, GE j is the green exposure level of the jth type of green infrastructure in an administrative region; p i is the total population of the ith analysis unit within the administrative division; G ij The coverage of the jth type of green infrastructure within the preset radius buffer range is taken as the center point of the centroid of the i-th analysis unit in the administrative division.

[0097] The overall per capita green exposure level is calculated as follows;

[0098]

[0099] Among them, percap_GE j G is the overall per capita green exposure level of the jth type of green infrastructure in an administrative region; ij The coverage of the jth type of green infrastructure within the preset radius buffer range is taken as the center point of the centroid of the i-th analysis unit in the administrative division.

[0100] In fact, according to the "Urban Green Space Planning Standard" GB / T 51346-2019, the recommended buffer zone radius is 500m.

[0101] "Administrative division" refers to the specific administrative divisions within the city, such as districts / streets / communities. The calculation of indicators can be used for comparison between administrative divisions; "analysis unit" refers to the smallest analysis unit used when calculating indicators, usually in the form of a regular grid, such as a 1km×1km grid analysis unit.

[0102] Step 3: Integrate all evaluation indicators to obtain a summary table of urban green infrastructure, so as to evaluate the level of urban green infrastructure in each administrative division and compare between administrative divisions.

[0103] Specifically, the summary table of urban green infrastructure is shown in Table 2.

[0104] Table 2 Summary of urban green infrastructure

[0105]

[0106]

[0107]

[0108] 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 classifying and evaluating urban green infrastructure.

[0109] 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 classifying and evaluating urban green infrastructure is implemented.

[0110] In an exemplary embodiment, a computer program product is provided, including a computer program, which implements a method for classifying and evaluating urban green infrastructure when executed by a processor.

[0111] 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 2 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. Among them, 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. Among them, 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 classifying and evaluating urban green infrastructure is implemented.

[0112] Those skilled in the art will understand that Figure 2 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.

[0113] 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.

[0114] Those skilled 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).

[0115] 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.

[0116] 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.

[0117] 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 classification and evaluation method for urban green infrastructure, characterized in that: The urban green infrastructure classification and evaluation method includes: Obtaining the mapping results of urban green infrastructure and the actual needs of users; the actual needs are the first needs or the second needs, the first need is to conduct statistics on the level of urban green infrastructure construction, and the second need is to conduct an assessment of the urban green infrastructure's ability to support ecosystem services and biodiversity; Based on the mapping results of urban green infrastructure, the evaluation indicators corresponding to the actual needs are calculated; the evaluation indicators corresponding to the first needs include: urban green infrastructure coverage rate and urban-rural green infrastructure coverage rate; the evaluation indicators corresponding to the second needs include: the overall coverage of various types of green infrastructure in each administrative division, the green exposure level and the overall per capita green exposure level; All evaluation indicators are integrated to obtain a summary table of urban green infrastructure, so as to evaluate the level of urban green infrastructure in each administrative division and compare between administrative divisions.

2. The urban green infrastructure classification and evaluation method according to claim 1 is characterized in that: Obtain mapping results for urban green infrastructure, including: Obtain an initial urban green infrastructure classification table; Adjust and add categories of urban green infrastructure in the initial urban green infrastructure classification table to obtain a target urban green infrastructure classification table; Drawing is performed based on the target city green infrastructure classification table to obtain a mapping result of the city's green infrastructure.

3. The urban green infrastructure classification and evaluation method according to claim 2 is characterized in that: New and adjusted categories include: G136 theme park, G137 wetland park, G138 forest park, TG urban farmland, GR green roof, GW green exterior wall, GP green parking lot, BG balcony greening, SG sponge city facilities, ZG urban wilderness, CG suburban farmland and NG natural wilderness.

4. The urban green infrastructure classification and evaluation method according to claim 1 is characterized in that: When the actual demand is the first demand, the evaluation index corresponding to the first demand is calculated using the first indicator calculation formula based on the mapping result of the urban green infrastructure; The calculation formula for the first indicator includes: the urban green infrastructure coverage rate calculation formula and the urban-rural green infrastructure coverage rate calculation formula.

5. The urban green infrastructure classification and evaluation method according to claim 4 is characterized in that: The calculation formula for the urban green infrastructure coverage rate is: Among them, λ g is the coverage rate of urban green infrastructure, in %; A g1 is the park green area, in square meters; A g2 A is the area of ​​protective green space, in square meters; g3' A is the green area of ​​the square, in square meters; xg A is the area of ​​the attached green space, in square meters; tg is the urban farmland area, in square meters; A gr' A is the green roof area within the boundary of urban construction land, in square meters; gw' A is the green exterior wall area within the boundary of urban construction land, in square meters; gp' A is the green parking area within the boundary of urban construction land, in square meters; bg' It is the green area of ​​​​balconies within the boundary of urban construction land, in square meters; A sg' A is the area of ​​sponge city facilities within the boundary of urban construction land, in square meters; zg is the urban wilderness area, in square meters; A c is the land area of ​​the city, in square meters; The calculation formula for the coverage rate of urban and rural green infrastructure is: Among them, λ G is the coverage rate of urban and rural green infrastructure, in %; A gr is the green roof area, in square meters; A gw is the green exterior wall area, in square meters; A gp is the green parking lot area, in square meters; A bg is the green area of ​​the balcony, in square meters; A sg A is the area of ​​sponge city facilities, in square meters; eg is the area of ​​regional green space, in square meters; A cg is the suburban cultivated land area, in square meters; A ng is the natural wilderness area, in square meters; A c It refers to the urban and rural land area in square meters.

6. The urban green infrastructure classification and evaluation method according to claim 1 is characterized in that: When the actual demand is the second demand, the evaluation index corresponding to the second demand is calculated using the second indicator calculation formula based on the mapping results of the urban green infrastructure; The second indicator calculation formula includes: an overall coverage calculation formula, a green exposure level calculation formula and an overall per capita green exposure level calculation formula.

7. The urban green infrastructure classification and evaluation method according to claim 6 is characterized in that: The overall coverage calculation formula is: Among them, GC j G is the overall coverage of the jth type of green infrastructure within an administrative region; ij is the coverage of the jth type of green infrastructure in the ith analysis unit within the administrative division; n is the total number of analysis units within the administrative division; The green exposure level calculation formula is: Among them, GE j is the green exposure level of the jth type of green infrastructure in an administrative region; p i is the total population of the ith analysis unit within the administrative division; G ij The coverage of the jth type of green infrastructure within the preset radius buffer range is calculated with the centroid of the i-th analysis unit in the administrative division as the center point; The calculation formula for the overall per capita green exposure level is: Among them, percap_GE j G is the overall per capita green exposure level of the jth type of green infrastructure in an administrative region; ij The coverage of the jth type of green infrastructure within the preset radius buffer range is taken as the center point of the centroid of the i-th analysis unit in the administrative division.

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 urban green infrastructure classification and evaluation method 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, the urban green infrastructure classification and evaluation method described in any one of claims 1 to 7 is implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the urban green infrastructure classification and evaluation method described in any one of claims 1 to 7 is implemented.

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