Large-scale city ecological environment management and control unit refined delimiting method and system

Abstract

The invention discloses a large-scale city ecological environment management and control unit refined demarcation method and system, and the method comprises the steps: formulating a geographic space data list, and constructing a geographic space database; constructing an ecological environment refined management and control unit delimiting and optimizing strategy toolbox; demarcation steps are selected differentially from an ecological environment refined management and control unit demarcation and optimization strategy toolbox, boundaries of various ecological environment management and control units are demarcated, management and control levels are determined, threshold values for judging the management and control levels of the units are set, and ecological environment management and control unit types of a research area are determined in combination with dominant ecological environment functions of the units; and merging the adjacent ecological environment management and control units based on a similar merging rule to obtain a final ecological environment refined management and control unit of the research area. According to the method, connection of ecological environment zoning management and control and an environment influence evaluation system is effectively promoted, ecological environment management and control units with appropriate scales and clear functions are defined, and fine management of ecological environment sensitive areas and ecological environment important areas is promoted.

Description

Technical Field

[0001] The present invention relates to the technical field of urban ecological environment zoning control, and in particular to a method for finely defining large-scale urban ecological environment control units. Background Art

[0002] The ecological environment control unit is the main carrier for implementing the ecological protection red line, environmental quality bottom line, resource utilization upper line and ecological environment access list, that is, the ecological environment zoning control, and is one of the key links to ensure its precise implementation.

[0003] At present, domestic research on ecological environmental control unit delineation methods mainly focuses on the technical process description of existing single-factor environmental zoning and ecological environmental control unit delineation results in specific areas. There are few comparative discussions on different ecological environmental control units and delineation methods in actual work.

[0004] Therefore, comparing different methods of delineating ecological environmental control units, exploring their applicability at different spatial scales, geographical characteristics, and ecological environmental protection characteristics, and more scientifically and reasonably delineating and updating ecological environmental control units are technical difficulties and urgent issues to be addressed in the preparation, updating, adjustment, and continuous application of ecological environmental zoning control plans. Summary of the invention

[0005] Purpose of the invention: To provide a method for finely defining ecological environment control units in large cities, so as to solve the above problems existing in the prior art. On the other hand, to provide a system for finely defining ecological environment control units in large cities.

[0006] Technical solution: A method for fine-grained delineation of large-scale urban ecological environment control units, comprising the following steps:

[0007] Step S1, collecting geospatial data required for delineation of ecological environment control units, determining geospatial data preprocessing requirements, and standardizing and integrating geospatial data based on the geospatial data preprocessing requirements to obtain a geospatial database, wherein the geospatial database includes: a basic geospatial database, an ecological environment thematic database, a construction and development thematic database, and a trial delineation results database;

[0008] Step S2: Building an ecological environment control unit delineation optimization toolbox based on the ecological environment control unit delineation optimization method, comprising four modules: a delineation content library module, a basic unit module, a partition superposition module, and a similar merging module;

[0009] Step S3: Classify the study area into four sub-areas: central urban area, urban concentration area, industrial agglomeration area, and ecological protection area. Based on the actual ecological environment management, differentiated delineation steps are selected from the ecological environment control unit delineation optimization toolbox;

[0010] Step S4: extract the geographic spatial data of the study area, delineate the boundaries of various ecological environment control units and determine the control level, set the threshold for determining the unit control level, determine the type of ecological environment control unit in the study area in combination with the dominant ecological environment function of the unit, merge adjacent similar ecological environment control units, and obtain the final comprehensive environmental control unit in the study area.

[0011] According to one aspect of the present application, step S1 further comprises:

[0012] Step S11: Collecting geospatial data required for delineation of ecological environment management and control units, wherein the geospatial data includes geospatial data of ecology, water, atmosphere, soil, and nearshore waters;

[0013] Step S12: determining the geospatial data preprocessing requirements, and standardizing and integrating the collected geospatial data based on the geospatial data preprocessing requirements to obtain various spatial data sets;

[0014] Step S13: constructing a geospatial database based on various spatial data sets, wherein the geospatial database includes a basic geospatial database, an ecological environment thematic database, a construction and development thematic database, and a trial planning results database.

[0015] According to one aspect of the present application, step S13 is further:

[0016] Step S13a, the basic geographic spatial database includes spatial data of administrative divisions, topographic elements, land cover, road network and water system;

[0017] Step S13b, the ecological environment database includes ecological environment zoning control, environmental function zoning, environmental statistical data, ecological protection red lines, and spatial data of nature reserves;

[0018] Step S13c, construct and develop a special database including spatial data of national land space planning, industrial parks, various special plans, and demographic data;

[0019] Step S13d, the trial delineation results database includes spatial data of trial delineation results of different methods and their comparative analysis results.

[0020] According to one aspect of the present application, step S2 further comprises:

[0021] Step S21, determine the content of participation in delineation, including: ecological protection red line, environmental quality bottom line, resource utilization upper line and various ecological environment control zones;

[0022] Step S22, the basic unit mainly includes the boundaries of administrative divisions at all levels, river basins, legally protected areas, industrial parks, and various element divisions;

[0023] Step S23, superimposing each partition by selecting superimposed content, setting superimposed weights and superimposing methods;

[0024] Step S24: Merge each zone based on area merging, element control zone merging, management entity merging and urban functional zone merging.

[0025] According to one aspect of the present application, step S3 further comprises:

[0026] Step S31: Divide the inner area of ​​the city into four types of sub-areas, namely, the central urban area, the town concentration area, the industrial agglomeration area and the ecological protection area;

[0027] Step S32: Based on the divided central urban area, urban concentration area, industrial agglomeration area and ecological protection area, differentiated delineation steps are selected from the constructed ecological environment management unit delineation optimization toolbox based on the corresponding ecological environment management practices.

[0028] According to one aspect of the present application, step S4 is further:

[0029] Step S41, extracting the geographic spatial data of the study area, and dividing the environmental control units into three categories: priority protection units, key control units and general control units based on the regional functions and control requirements of environmental elements including ecology, water, atmosphere and soil;

[0030] Step S42: Calculate the proportion of the three types of zones, namely, priority protection units, key control units and general control units, to the total area of ​​the unit respectively; set a threshold for determining the control level of the unit based on the composition structure and area proportion of the priority protection units, key control units and general control units; then calculate in turn whether the area proportion of each zone exceeds the set threshold for determining the control level of the unit; and obtain the type of the ecological environment control unit in combination with the dominant ecological environment function of the unit;

[0031] Step S43: Based on the determined ecological environment control unit type classification results, the priority protection unit area and the key control unit area are combined and superimposed, and other areas are set as general control areas to generate a partition summary vector; the partition summary vector is placed on the village-level administrative boundary, and the priority, key, and general partition area ratios of each village are counted to form a village-level control classification; the control classification of some scattered village patches is adjusted, and villages of the same control type in the same district or county are merged to form a preliminary control unit; the industrial parks and water source protection areas are sorted out and divided according to districts and counties, and superimposed with the preliminary control units, and the resulting fragments are merged with the surrounding areas to generate the final comprehensive environmental control unit.

[0032] According to one aspect of the present application, step S41 is further:

[0033] Step S41a, superimpose and fit the administrative divisions, industrial park boundaries, ecological protection red lines, ecological spaces, water environment control zones, air environment control zones, and soil pollution risk control zones, and use a step-by-step clustering method to delineate environmental control units;

[0034] Step S41b: divide the ecological space, water environment priority protection area and atmospheric environment priority protection area involving the ecological protection red line into priority protection units, divide the areas involving key control of resource and environmental elements including water, atmosphere, soil and natural resources into key control units, and divide other areas into general control units;

[0035] Step S41c: divide the environmental control units into three categories: priority protection, key control and general control based on the regional functions and control requirements of environmental elements including ecology, water, atmosphere and soil.

[0036] According to one aspect of the present application, step S42 is further:

[0037] Step S42a, based on the township administrative divisions, combined with the three types of zones divided in S21, priority protection, key control and general control, boundary fitting is performed to calculate the proportion of the three types of zones of priority protection units, key control units and general control units to the total area of ​​the unit after the elements in the unit are superimposed;

[0038] Step S42b, based on the calculated proportions of the three types of zones, namely, priority protection units, key control units and general control units, to the total area of ​​the unit, a threshold for determining the control level of the unit is set in combination with the composition structure of the three types of zones;

[0039] Step S42c, calculate whether the area ratio of each element partition exceeds the set threshold, and combine the calculation result with the dominant ecological and environmental function of the unit to obtain the type of ecological and environmental control unit.

[0040] According to one aspect of the present application, step S43 is further:

[0041] Step S43a: Based on the divided ecological environment control units, the priority and key control areas of the three elements of ecology, water and air are combined and superimposed;

[0042] Step S43b, set other areas in the administrative area as general control areas, generate a partition summary vector; place the partition summary vector on the village-level administrative boundary, count the area proportions of priority, key, and general partitions for each village, determine the control classification of each village according to the proportion of the partitions accounting for more than 50% of the village, and form a village-level control classification;

[0043] Step S43c: adjust the control classification of some scattered village patches, merge villages of the same control type in the same district or county to form preliminary control units;

[0044] Step S43d, divide the industrial park and water source protection area by district and county, overlap the divided area with the preliminary management and control unit, merge the generated fragments with the surrounding area, and generate the final comprehensive environmental management and control unit.

[0045] According to another aspect of the present application, a system for finely defining ecological environment control units in a large city is provided, comprising:

[0046] at least one processor; and

[0047] a memory communicatively connected to at least one of the processors; wherein,

[0048] The memory stores instructions that can be executed by the processor, and the instructions are used to be executed by the processor to implement a method for fine-grained delineation of large-scale urban ecological environment control units as described in any of the above technical solutions.

[0049] Beneficial effects: The adoption of a method for refined delineation of ecological environment control units in large cities can integrate more ecological environment management entities, effectively promote the connection between ecological environment zoning control and environmental impact assessment system, delineate ecological environment control units with appropriate scales and clear functions, promote the refined management of ecological environment sensitive areas and ecological environment important areas, and have flexibility and adjustability to adapt to urban development and environmental changes. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 It is a flow chart of the present invention.

[0051] Figure 2 It is a flow chart of step S1 of the present invention.

[0052] Figure 3 It is a flow chart of step S2 of the present invention.

[0053] Figure 4 It is a flow chart of step S3 of the present invention.

[0054] Figure 5 It is a flow chart of step S4 of the present invention. DETAILED DESCRIPTION

[0055] like Figure 1-Figure 5 According to one aspect of the present application, a method for finely defining ecological environment control units in a large city is provided, which is characterized by comprising the following steps:

[0056] Step S1, collecting geospatial data required for delineation of ecological environment control units, determining geospatial data preprocessing requirements, and standardizing and integrating geospatial data based on the geospatial data preprocessing requirements to obtain a geospatial database, wherein the geospatial database includes: a basic geospatial database, an ecological environment thematic database, a construction and development thematic database, and a trial delineation results database;

[0057] Step S2: Building an ecological environment control unit delineation optimization toolbox based on the ecological environment control unit delineation optimization method, comprising four modules: a delineation content library module, a basic unit module, a partition superposition module, and a similar merging module;

[0058] Step S3: Classify the study area into four sub-areas: central urban area, urban concentration area, industrial agglomeration area, and ecological protection area. Based on the actual ecological environment management, differentiated delineation steps are selected from the ecological environment control unit delineation optimization toolbox;

[0059] Step S4: extract the geographic spatial data of the study area, delineate the boundaries of various ecological environment control units and determine the control level, set the threshold for determining the unit control level, determine the type of ecological environment control unit in the study area in combination with the dominant ecological environment function of the unit, merge adjacent similar ecological environment control units, and obtain the final comprehensive environmental control unit in the study area.

[0060] Common methods for delineating ecological environment control units are mainly threshold method and overlay method. The overlay method is used to delineate ecological protection red lines, water environment priority protection areas, and atmospheric environment priority protection areas as priority protection units, and industrial parks at or above the provincial level are delineated as key control units. The threshold method is used in other areas to fit the ecological, atmospheric and other environmental element control zoning maps to administrative divisions, and the priority, key and general control categories are determined according to the area ratio to support the promotion of refined ecological environment management. The above aspects have the problems that the ecological environment control units do not correspond to administrative division boundaries, the unit scales are inconsistent, and the management objects are relatively vague. To solve the above problems, in this embodiment, a method is adopted. The method for refined delineation of ecological environment control units in large cities, based on the existing methods, takes into account the overall number and scale of ecological environment control units, merges adjacent similar ecological environment control units to control the scale of ecological environment control units, proposes consistent ecological environment control requirements, improves management efficiency, and takes into account the principles, procedures, subjects, and frequency of subsequent updating and adjustment of results. It reserves appropriate updating and adjustment interfaces, selects delineation steps in a differentiated manner according to the actual ecological environment management needs of different functional areas in the city, strengthens the optimization of key industrial layout and structure from the regional level, refines ecological environment control requirements, and improves the guidance of ecological environment zoning control.

[0061] According to one aspect of the present application, step S1 further comprises:

[0062] Step S11: Collecting geospatial data required for delineation of ecological environment management and control units, wherein the geospatial data includes geospatial data of ecology, water, atmosphere, soil, and nearshore waters;

[0063] Step S12: determining the geospatial data preprocessing requirements, and standardizing and integrating the collected geospatial data based on the geospatial data preprocessing requirements to obtain various spatial data sets;

[0064] Step S13: constructing a geospatial database based on various spatial data sets, wherein the geospatial database includes a basic geospatial database, an ecological environment thematic database, a construction and development thematic database, and a trial planning results database.

[0065] Collect basic geographic data such as regional basic geography, remote sensing images, land use status, administrative divisions, etc., systematically organize various ecological environmental resource data, bulletin yearbooks, economic and social status, national land space planning and other special data, further standardize the data and perform reliability analysis to establish a spatial database.

[0066] Among them, basic geographic information data include administrative divisions, topographic elements, surface cover, road networks and water systems, etc.; ecological environment thematic data include ecological environment zoning control plans, environmental functional zoning, environmental statistical data, ecological protection red lines, nature reserves and other information; construction and development thematic data include national land space planning, industrial parks, various special plans, demographic data and other information. In principle, the data used for demarcation are documents officially released by government departments, and the analysis is carried out in combination with various relevant laws, regulations and policies.

[0067] Based on the spatial database, we conduct research, analysis and situation prediction on the regional ecological environment and social and economic status, carry out comprehensive analysis of the natural environment conditions, resource and energy endowment and social and economic development, fully consider factors such as ecological and environmental protection, economic layout, population distribution, and land space utilization, connect with the ecological and environmental zoning control system, and identify spatial regional types.

[0068] In this embodiment, the spatial data list required for the delineation of ecological environment control units is systematically sorted out, covering various types of geographic spatial data required for ecology, water, atmosphere, soil, and nearshore waters, clarifying the requirements for spatial data preprocessing, and integrating various types of spatial data through data standardization to establish data standards, data update processes, and data management rules for the spatial database of environmental control units.

[0069] Establish a work base map for delineating ecological environment control units with unified coordinates and standardized data. By systematically building a spatial database and establishing a unified research and analysis work base map, we can achieve process management of preliminary delineation, method adjustment, unit refinement, and unit update.

[0070] According to one aspect of the present application, step S13 is further:

[0071] Step S13a, the basic geographic spatial database includes spatial data of administrative divisions, topographic elements, land cover, road network and water system;

[0072] Step S13b, the ecological environment database includes ecological environment zoning control, environmental function zoning, environmental statistical data, ecological protection red lines, and spatial data of nature reserves;

[0073] Step S13c, construct and develop a special database including spatial data of national land space planning, industrial parks, various special plans, and demographic data;

[0074] Step S13d, the trial delineation results database includes spatial data of trial delineation results of different methods and their comparative analysis results.

[0075] According to one aspect of the present application, step S2 further comprises:

[0076] Step S21, determine the content of participation in delineation, including: ecological protection red line, environmental quality bottom line, resource utilization upper line and various ecological environment control zones;

[0077] Step S22, the basic unit mainly includes the boundaries of administrative divisions at all levels, river basins, legally protected areas, industrial parks, and various element divisions;

[0078] Step S23, superimposing each partition by selecting superimposed content, setting superimposed weights and superimposing methods;

[0079] In this embodiment, in accordance with the principles of ecological priority and problem orientation, the ecological protection space and the key control zones of various elements are highlighted, the element zones are superimposed and then merged, and the small fragmented patches are eliminated. The integrity of the boundary attributes of ecological space, element control zones, industrial parks and urban development is taken into account, the boundaries of various ecological environment control units are delineated and the control levels are determined.

[0080] Step S24: Merge each zone based on area merging, element control zone merging, management entity merging and urban functional zone merging.

[0081] The delineation of ecological environment control units should comply with the technical specifications for the compilation of ecological environment zoning control and related work requirements formulated by the state and the province to ensure that the delineated ecological environment control units can be included in the "one map" of the country and the province, undertake top-down ecological environment zoning control measures, and support effective environmental management. Therefore, in this embodiment, through systematic analysis of common delineation methods, identification of key delineation steps, and condensation of step-by-step optimization suggestions, a toolbox of optimization methods suitable for delineating ecological environment control units in large cities is formed.

[0082] According to one aspect of the present application, step S3 further comprises:

[0083] Step S31 divides the inner area of ​​the city into four types of sub-areas, namely the central urban area, the town concentration area, the industrial agglomeration area and the ecological protection area;

[0084] Step S32: Based on the divided central urban area, urban concentration area, industrial agglomeration area and ecological protection area, differentiated delineation steps are selected from the constructed ecological environment management unit delineation optimization toolbox in combination with the corresponding ecological environment management practices.

[0085] Different areas are suitable for different environmental control unit delineation methods. Therefore, in this embodiment, the study area is divided into four types of sub-areas through regional delineation: central urban area, urban concentration area, industrial agglomeration area and ecological protection area. Combined with the corresponding ecological environmental management practices, differentiated delineation steps are selected from the constructed ecological environmental control unit delineation optimization toolbox, which can promote the refined management of ecological environmental sensitive areas and ecological environmental important areas, and at the same time have flexibility and adjustability, and are more adaptable to urban development and environmental changes.

[0086] According to one aspect of the present application, step S4 is further:

[0087] Step S41, extracting the geographic spatial data of the study area, and dividing the environmental control units into three categories: priority protection units, key control units and general control units based on the regional functions and control requirements of environmental elements including ecology, water, atmosphere and soil;

[0088] Step S42: Calculate the proportion of the three types of zones, namely, priority protection units, key control units and general control units, to the total area of ​​the unit respectively; set a threshold for determining the control level of the unit based on the composition structure and area proportion of the priority protection units, key control units and general control units; then calculate in turn whether the area proportion of each zone exceeds the set threshold for determining the control level of the unit; and obtain the type of the ecological environment control unit in combination with the dominant ecological environment function of the unit;

[0089] Step S43: Based on the determined ecological environment control unit type classification results, the priority protection unit area and the key control unit area are combined and superimposed, and other areas are set as general control areas to generate a partition summary vector; the partition summary vector is placed on the village-level administrative boundary, and the priority, key, and general partition area ratios of each village are counted to form a village-level control classification; the control classification of some scattered village patches is adjusted, and villages of the same control type in the same district or county are merged to form a preliminary control unit; the industrial parks and water source protection areas are sorted out and divided according to districts and counties, and superimposed with the preliminary control units, and the resulting fragments are merged with the surrounding areas to generate the final comprehensive environmental control unit.

[0090] In this embodiment, based on the comprehensive method recommended by the provincial technical team, the threshold method and the superposition method are combined to superimpose the ecological, water, atmospheric and other environmental elements control zoning layers, and the threshold method is used based on the water environment control unit to perform hard cutting on the ecological protection red line, water environment priority protection area, atmospheric environment priority protection area and the boundary of industrial parks at or above the provincial level;

[0091] 1km 2The following fragments can be merged with the surrounding areas. Priority protection areas involving ecological protection red lines, atmospheric environment category I areas and drinking water source protection areas should, in principle, be designated as priority protection units when the integrated control units are superimposed. When such priority protection areas are determined to be key control units or general control units due to their small areas after superposition, they should be directly divided into a unit according to the actual boundaries of the above-mentioned areas, and the split unit should be designated as a priority, key or general control unit according to the above principles.

[0092] The advantage of the superposition method is that it retains the boundary range and basic attributes of the element zoning, with a higher degree of refinement, which is convenient for classified and graded management according to resource and environmental elements, and is more in line with the needs of promoting refined control of ecological environment space. However, there may be problems such as some units being too small and unclear management subjects. Therefore, in the follow-up evaluation and update and adjustment work, the ecological environment control units delineated by the superposition method are optimized and adjusted. On the one hand, from the perspective of ensuring the stability of ecosystem functions, it is recommended to maintain the stability of the division of priority protection units; at the same time, the key control units should be further verified in combination with actual applications, and their unit attributes, protection targets, emission intensity, environmental quality, risk status, etc. should be confirmed one by one to determine whether the unit has sensitive targets, whether it is a high emission area, a heavily polluted area, and a high-risk area, and to determine the level of key control units and corresponding control requirements. If it is adjusted to a general control unit, the element zoning control requirements must still be implemented; the control level and requirements of general control units should be optimized and adjusted in a timely manner according to changes in unit characteristics and external conditions. The process of delineating ecological environment control units by the superposition method should be a dynamic closed-loop process. From the perspective of promoting refined control of ecological environment zoning, it is recommended to give priority to delineating ecological environment control units by the superposition method.

[0093] The main advantage of the threshold method is that the boundaries of the control units are relatively clear, the management subjects are clear, and it is easy to facilitate assessment and management. However, this method also has limitations. On the one hand, when there are multiple element control zones within a township, some control requirements and rectification measures may only apply to part of the area within the unit, which can easily lead to "expansion" or "inadvertent injury" in application, resulting in a reduction in the level of refinement of ecological environmental zoning control. On the other hand, the threshold standard has a greater impact on the results of the delineation of ecological environmental control units, but there is no unified standard for determining the threshold. If adjacent regions adopt different threshold standards, it will increase the difficulty of regional coordination and is not conducive to classified and coordinated management.

[0094] Therefore, the comprehensive method adopted in this embodiment can maximize the protection of important ecological function areas and key priority protection towns and streets.

[0095] According to one aspect of the present application, step S41 is further:

[0096] Step S41a, superimpose and fit the administrative divisions, industrial park boundaries, ecological protection red lines, ecological spaces, water environment control zones, air environment control zones, and soil pollution risk control zones, and use a step-by-step clustering method to delineate environmental control units;

[0097] Step S41b: divide the ecological space, water environment priority protection area and atmospheric environment priority protection area involving the ecological protection red line into priority protection units, divide the areas involving key control of resource and environmental elements including water, atmosphere, soil and natural resources into key control units, and divide other areas into general control units;

[0098] Step S41c: divide the environmental control units into three categories: priority protection, key control and general control based on the regional functions and control requirements of environmental elements including ecology, water, atmosphere and soil.

[0099] In this embodiment, City A is divided into 353 environmental control units with an average unit area of ​​20.53 square kilometers. Compared with the average unit area of ​​30.58 square kilometers in the current results, the division scale is finer, and the area of ​​key control units has increased.

[0100] According to one aspect of the present application, step S42 is further:

[0101] Step S42a, based on the township administrative divisions, combined with the three types of zones divided in S21, priority protection, key control and general control, boundary fitting is performed to calculate the proportion of the three types of zones of priority protection units, key control units and general control units to the total area of ​​the unit after the elements in the unit are superimposed;

[0102] Step S42b, based on the calculated proportions of the three types of zones, namely, priority protection units, key control units and general control units, to the total area of ​​the unit, a threshold for determining the control level of the unit is set in combination with the composition structure of the three types of zones;

[0103] Step S42c, calculate whether the area ratio of each element partition exceeds the set threshold, and combine the calculation result with the dominant ecological and environmental function of the unit to obtain the type of ecological and environmental control unit.

[0104] In this embodiment, town-level administrative divisions and provincial and above industrial park boundaries are fitted, and adjacent similar units are merged within a certain scale range. City A is divided into 206 environmental control units with an average unit area of ​​35.19 square kilometers. Compared with the current average unit area of ​​30.58 square kilometers, the division scale is coarser, among which the areas of priority control units and general control units have decreased, and the area of ​​key control units has increased.

[0105] According to one aspect of the present application, step S43 is further:

[0106] Step S43a: Based on the divided ecological environment control units, the priority and key control areas of the three elements of ecology, water and air are combined and superimposed;

[0107] Step S43b, set other areas in the administrative area as general control areas, generate a partition summary vector; place the partition summary vector on the village-level administrative boundary, count the area proportions of priority, key, and general partitions for each village, determine the control classification of each village according to the proportion of the partitions accounting for more than 50% of the village, and form a village-level control classification;

[0108] Step S43c: adjust the control classification of some scattered village patches, merge villages of the same control type in the same district or county to form preliminary control units;

[0109] Step S43d, divide the industrial park and water source protection area by district and county, overlap the divided area with the preliminary management and control unit, merge the generated fragments with the surrounding area, and generate the final comprehensive environmental management and control unit.

[0110] In this embodiment, the town-level administrative divisions and the boundaries of provincial and above industrial parks are fitted, and adjacent similar units are merged within a certain scale range. City A is divided into 302 environmental control units with an average unit area of ​​24.01 square kilometers. Compared with the current average unit area of ​​30.58 square kilometers, the number of units has increased and the division scale has become finer.

[0111] Through the research and analysis of the division methods of typical urban ecological environment control units, on the basis of meeting the requirements of existing technical specifications, the optimization method of ecological environment control unit division suitable for City A is studied. At the same time, the technical process of updating and adjusting the optimization results due to changes in the ecological protection red line, nature reserves, environmental functional zoning, and industrial park scope is further sorted out. Comprehensively combining the results of the update and adjustment of ecological environment element control zoning such as ecology, atmosphere, and water, fitting the updated administrative divisions, industrial parks and other boundary data, and conducting a trial analysis of the environmental control units of City A, an ecological environment control unit with clear functions, clear boundaries, unified coding, and unique spatial attributes is established, laying the foundation for the subsequent deepening of the ecological environment access list, clarifying the implementation and application management subjects, and connecting environmental impact assessments.

[0112] According to another aspect of the present application, a system for finely defining ecological environment control units in a large city is provided, which is characterized by comprising:

[0113] at least one processor; and

[0114] a memory communicatively connected to at least one of the processors; wherein,

[0115] The memory stores instructions that can be executed by the processor, and the instructions are used to be executed by the processor to implement any of the above-mentioned methods for fine-grained delineation of large-scale urban ecological environment management and control units.

[0116] The preferred embodiments of the present invention are described in detail above; however, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and these equivalent transformations all belong to the protection scope of the present invention.

Claims

1. A method for finely defining ecological environment control units in large cities, characterized in that: The steps include: Step S1, collecting geospatial data required for delineation of ecological environment control units, determining geospatial data preprocessing requirements, and standardizing and integrating geospatial data based on the geospatial data preprocessing requirements to obtain a geospatial database, wherein the geospatial database includes: a basic geospatial database, an ecological environment thematic database, a construction and development thematic database, and a trial delineation results database; Step S2: Building an ecological environment control unit delineation optimization toolbox based on the ecological environment control unit delineation optimization method, comprising four modules: a delineation content library module, a basic unit module, a partition superposition module, and a similar merging module; Step S3: Classify the study area into four sub-areas: central urban area, urban concentration area, industrial agglomeration area, and ecological protection area. Based on the actual ecological environment management, differentiated delineation steps are selected from the ecological environment control unit delineation optimization toolbox; Step S4: extract the geographic spatial data of the study area, delineate the boundaries of various ecological environment control units and determine the control level, set the threshold for determining the unit control level, determine the type of ecological environment control unit in the study area in combination with the dominant ecological environment function of the unit, merge adjacent similar ecological environment control units, and obtain the final comprehensive environmental control unit in the study area.

2. A method for finely defining ecological environment control units in a large city as claimed in claim 1, characterized in that: The step S1 is further as follows: Step S11: Collecting geospatial data required for delineation of ecological environment management and control units, wherein the geospatial data includes geospatial data of ecology, water, atmosphere, soil, and nearshore waters; Step S12: determining the geospatial data preprocessing requirements, and standardizing and integrating the collected geospatial data based on the geospatial data preprocessing requirements to obtain various spatial data sets; Step S13: constructing a geospatial database based on various spatial data sets, wherein the geospatial database includes a basic geospatial database, an ecological environment thematic database, a construction and development thematic database, and a trial planning results database.

3. A method for finely defining ecological environment control units in a large city as claimed in claim 2, characterized in that: The step S13 is further as follows: Step S13a, the basic geographic spatial database includes spatial data of administrative divisions, topographic elements, land cover, road network and water system; Step S13b, the ecological environment database includes ecological environment zoning control, environmental function zoning, environmental statistical data, ecological protection red lines, and spatial data of nature reserves; Step S13c, construct and develop a special database including spatial data of national land space planning, industrial parks, various special plans, and demographic data; Step S13d, the trial delineation results database includes spatial data of trial delineation results of different methods and their comparative analysis results.

4. A method for finely defining large-scale urban ecological environment control units as claimed in claim 1, characterized in that: The step S2 is further as follows: Step S21, determine the content of participation in delineation, including: ecological protection red line, environmental quality bottom line, resource utilization upper line and various ecological environment control zones; Step S22, the basic unit mainly includes the boundaries of administrative divisions at all levels, river basins, legally protected areas, industrial parks, and various element divisions; Step S23, superimposing each partition by selecting superimposed content, setting superimposed weights and superimposing methods; Step S24: Merge each zone based on area merging, element control zone merging, management entity merging and urban functional zone merging.

5. A method for finely defining large-scale urban ecological environment control units as claimed in claim 1, characterized in that: The step S3 is further as follows: Step S31: Divide the inner area of ​​the city into four types of sub-areas, namely, the central urban area, the town concentration area, the industrial agglomeration area and the ecological protection area; Step S32: Based on the divided central urban area, urban concentration area, industrial agglomeration area and ecological protection area, differentiated delineation steps are selected from the constructed ecological environment management unit delineation optimization toolbox based on the corresponding ecological environment management practices.

6. A method for finely defining large-scale urban ecological environment control units as claimed in claim 1, characterized in that: The step S4 is further as follows: Step S41, extracting the geographic spatial data of the study area, and dividing the environmental control units into three categories: priority protection units, key control units and general control units based on the regional functions and control requirements of environmental elements including ecology, water, atmosphere and soil; Step S42: Calculate the proportion of the three types of zones, namely, priority protection units, key control units and general control units, to the total area of ​​the unit respectively; set a threshold for determining the control level of the unit based on the composition structure and area proportion of the priority protection units, key control units and general control units; then calculate in turn whether the area proportion of each zone exceeds the set threshold for determining the control level of the unit; and obtain the type of the ecological environment control unit in combination with the dominant ecological environment function of the unit; Step S43: Based on the determined ecological environment control unit type classification results, the priority protection unit area and the key control unit area are combined and superimposed, and other areas are set as general control areas to generate a partition summary vector; the partition summary vector is placed on the village-level administrative boundary, and the priority, key, and general partition area ratios of each village are counted to form a village-level control classification; the control classification of some scattered village patches is adjusted, and villages of the same control type in the same district or county are merged to form a preliminary control unit; the industrial parks and water source protection areas are sorted out and divided according to districts and counties, and superimposed with the preliminary control units, and the resulting fragments are merged with the surrounding areas to generate the final comprehensive environmental control unit.

7. A method for finely defining large-scale urban ecological environment control units as claimed in claim 6, characterized in that: The step S41 is further as follows: Step S41a, superimpose and fit the administrative divisions, industrial park boundaries, ecological protection red lines, ecological spaces, water environment control zones, air environment control zones, and soil pollution risk control zones, and use a step-by-step clustering method to delineate environmental control units; Step S41b: divide the ecological space, water environment priority protection area and atmospheric environment priority protection area involving the ecological protection red line into priority protection units, divide the areas involving key control of resource and environmental elements including water, atmosphere, soil and natural resources into key control units, and divide other areas into general control units; Step S41c: divide the environmental control units into three categories: priority protection, key control and general control based on the regional functions and control requirements of environmental elements including ecology, water, atmosphere and soil.

8. A method for finely defining large-scale urban ecological environment control units as claimed in claim 6, characterized in that: The step S42 is further as follows: Step S42a, based on the township administrative divisions, combined with the three types of zones divided in S21, priority protection, key control and general control, boundary fitting is performed to calculate the proportion of the three types of zones of priority protection units, key control units and general control units to the total area of ​​the unit after the elements in the unit are superimposed; Step S42b, based on the calculated proportions of the three types of zones, namely, priority protection units, key control units and general control units, to the total area of ​​the unit, a threshold for determining the control level of the unit is set in combination with the composition structure of the three types of zones; Step S42c, calculate whether the area ratio of each element partition exceeds the set threshold, and combine the calculation result with the dominant ecological and environmental function of the unit to obtain the type of ecological and environmental control unit.

9. A method for finely defining large-scale urban ecological environment control units as claimed in claim 6, characterized in that: The step S43 is further as follows: Step S43a: Based on the divided ecological environment control units, the priority and key control areas of the three elements of ecology, water and air are combined and superimposed; Step S43b, setting other areas in the administrative area as general control areas, and generating a partition summary vector; The zoning summary vector is placed on the village-level administrative boundary, and the area proportion of priority, key, and general zoning in each village is counted. The management and control classification of each village is determined according to the proportion of zoning that accounts for more than 50% of the village, forming a village-level management and control classification; Step S43c: adjust the control classification of some scattered village patches, merge villages of the same control type in the same district or county to form preliminary control units; Step S43d, divide the industrial park and water source protection area by district and county, overlap the divided area with the preliminary management and control unit, merge the generated fragments with the surrounding area, and generate the final comprehensive environmental management and control unit.

10. A system for finely defining ecological environment control units in large cities, characterized in that: include: at least one processor; as well as a memory communicatively connected to at least one of the processors; wherein, The memory stores instructions that can be executed by the processor, and the instructions are used to be executed by the processor to implement a method for fine-grained delineation of large-scale urban ecological environment control units as described in any one of claims 1 to 9.

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