Method for evaluating recovery potential of cultivated land reserve resources

Abstract

The invention discloses a recovery potential evaluation method for cultivated land reserve resources. The method comprises the following steps: making a survey base map on the basis of annual land change survey result data; constructing a cultivated land reserve resource evaluation index system, and evaluating the cultivability of the cultivated land reserve resources in the survey base map; determining arable land reserve resource potential map spots through indoor screening and field checking on the basis of the limiting factors; according to the method, the cultivated land reserve resource evaluation index system is set, and the cultivation suitability of the cultivated land reserve resources in the survey base map is evaluated; and the regional cultivated land reserve resource potential map spots with the cultivated land forming potential are screened out through the limiting factors, so that the recovery potential of the cultivated land reserve resources is evaluated and analyzed, a scientific and effective regional cultivated land reserve resource plan is formed, and a promotion effect on a subsequent specific implementation plan is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of cultivated land reserve resource evaluation, and in particular to a method for evaluating the restoration potential of cultivated land reserve resources. Background Art

[0002] Reserve arable land resources are the fundamental guarantee for fully implementing arable land protection tasks, achieving a balance between occupation and compensation, and maintaining a balance between inflow and outflow. However, after years of land use, remediation, and development, regional reserve resources have undergone significant changes. During surveys and investigations, the existing reserve arable land resource system was unable to reasonably assess the restoration potential of reserve arable land resources, specifically their suitability for cultivation and their potential for arable land formation.

[0003] This means that even if the existing arable land reserve resource system has mastered the quantity and distribution of regional arable land reserve resources, it will be unable to carry out scientific and effective regional arable land reserve resource planning due to the different suitability and potential of each arable land reserve resource, which will also affect subsequent implementation plans.

[0004] In view of the above-mentioned defects, the inventors of the present invention finally obtained the present invention after a long period of research and practice. Summary of the Invention

[0005] In order to solve the above technical defects, the technical solution adopted by the present invention is to provide a method for evaluating the restoration potential of cultivated land reserve resources, comprising the steps of:

[0006] S1, prepare survey base map based on the annual land change survey results;

[0007] S2, constructing an evaluation index system for reserve cultivated land resources, and evaluating the suitability of the reserve cultivated land resources within the survey base map;

[0008] S3, based on limited factors and through internal screening and external verification, determine the potential map of arable land reserve resources.

[0009] Preferably, in step S1, based on the latest annual land change survey results and combined with remote sensing images, land type patches that meet the requirements are selected as potential arable land reserve resource patches, and the survey base map is prepared.

[0010] Preferably, in step S2, the arable land reserve resource evaluation index system is established by setting 10 evaluation indicators; the evaluation indicators include ecological conditions, terrain slope, annual accumulated temperature, annual precipitation and irrigation conditions, soil texture, soil heavy metal pollution status, salinization degree, soil pH value, soil layer thickness, and farming convenience.

[0011] Preferably, the ecological conditions are divided into three levels: outside the ecological protection red line and urban development boundary, within the ecological protection red line and urban development boundary, and development will lead to land degradation or trigger geological disasters; the terrain slope is divided into two levels: ≤25° and >25°; the annual accumulated temperature is divided into two levels: ≥1800℃ and <1800℃; the annual precipitation and irrigation conditions are divided into three levels: ≥400mm, <400mm with irrigation conditions, and <400mm without irrigation conditions, and the water resource status is indicated in the level of <400mm with irrigation conditions, and the irrigation water source is indicated as surface water / groundwater irrigation. For surface water irrigation, the name of the water source and Annual available water volume; in terms of soil texture, it is divided into two levels: loamy, clay or sandy, and gravel or coarser texture; in terms of soil heavy metal pollution status, it is divided into two levels: green, yellow or red; in terms of salinization degree, it is divided into three levels: none, mild salinization and moderate salinization, severe salinization with irrigation and drainage conditions, and severe salinization without irrigation and drainage conditions; in terms of soil pH value, it is divided into two levels: 4.0-9.5, ≤4.0 or ≥9.5; in terms of soil layer thickness, it is divided into three levels: ≥60cm, <60cm with foreign soil source, and <60cm without foreign soil source; in terms of farming convenience, it is divided into two levels: easily accessible and inconvenient to reach.

[0012] Preferably, the step S2 includes the following steps:

[0013] S21, collect and organize data;

[0014] Collecting arable land reserve resource evaluation index data related to the evaluation index;

[0015] S22, evaluation index vectorization;

[0016] Integrating and vectorizing the acquired arable land reserve resource evaluation index data to establish evaluation index vector data;

[0017] S23, supplementary field survey;

[0018] Supplement the evaluation index vector data by conducting additional field surveys and carrying out vectorization work for the additional surveys;

[0019] S24, carry out arable land suitability evaluation;

[0020] The evaluation index vector data is superimposed on the survey base map, and the index value attributes of the map blocks in the survey base map are marked one by one. According to the requirements of the arable land reserve resource evaluation index system and the unsuitable for cultivation evaluation index table, the restrictive factor evaluation method is used to evaluate the suitability of the map blocks in the survey base map one by one.

[0021] Preferably, in the evaluation index table for unsuitable cultivation, in the ecological conditions, if the land is located within the ecological protection red line and the urban development boundary, and the development will lead to land degradation or cause geological disasters, it is evaluated as unsuitable cultivation; in the terrain slope, if it is located within the level of >25°, it is evaluated as unsuitable cultivation; in the annual accumulated temperature, if it is located within the level of <1800℃, it is evaluated as unsuitable cultivation; in the annual precipitation and irrigation conditions, if it is located within the level of precipitation <400mm and no irrigation conditions, it is evaluated as unsuitable cultivation; in the soil texture, if it is located within the level of gravel soil, it is evaluated as unsuitable cultivation. or coarser texture, it is evaluated as unsuitable for cultivation; in terms of soil heavy metal pollution, if it is in the yellow or red level, it is evaluated as unsuitable for cultivation; in terms of salinization degree, if it is in the level of severe or above and there are no irrigation and drainage conditions, it is evaluated as unsuitable for cultivation; in terms of soil pH value, if it is in the level of pH ≥ 9.5 or ≤ 4.0, it is evaluated as unsuitable for cultivation; in terms of soil layer thickness, if it is in the level of < 60 cm and there is no foreign soil source, it is evaluated as unsuitable for cultivation; in terms of tillage convenience, if it is in the level of inconvenient access, it is evaluated as unsuitable for cultivation;

[0022] If any of the evaluation indicators in the index value attributes of the map spots in the survey base map reaches the unsuitable for cultivation condition, it will be divided into unsuitable for cultivation area, and the rest will be suitable for cultivation area.

[0023] Preferably, the step S3 includes the following steps:

[0024] S31, after deducting the unsuitable arable land areas from the potential arable land reserve resource spots in the survey base map, to generate arable land reserve resource potential scale data, based on the limiting factors, determine the potential arable land reserve resource spots that are not suitable for being arable land reserve resources, and in combination with the remote sensing image, eliminate spots that are not suitable for being classified as arable land reserve resources, and preliminarily determine spots to be included in the field verification;

[0025] S32, performing an internal analysis in combination with the remote sensing image, selecting the areas to be surveyed for the cultivated land reserve resources from the areas to be included in the field verification, and outlining the areas on the map in the form of cultivated land reserve resource areas to form a base map for the cultivated land reserve resource survey;

[0026] S33, based on the cultivated land reserve resource survey working base map, conducting field verification of the cultivated land reserve resource survey plots determined internally, confirming the location and scope of each plot, so as to determine the cultivated land reserve resource potential plots;

[0027] S34. Based on the actual situation of the reserve arable land resources and the surrounding conditions of the land parcels, the development and utilization direction of the potential map of the reserve arable land resources shall be reasonably determined. If the water source conditions are good, the land shall be transformed into paddy fields; if the water source conditions cannot meet the irrigation water demand, but the irrigation water demand can be met through the supporting farmland water conservancy facilities, the land shall be transformed into paddy fields first; if the conditions are not met, the land shall be transformed into irrigated land or dry land.

[0028] Preferably, in step S31, the limiting factors are the results of the second land survey, the highest flood level, the data on construction land approval in previous years, the plan for mapping the prepaid spatial scale indicators, the land consolidation projects implemented in previous years, and the minimum mapping requirements. The determination process is as follows:

[0029] The data on the potential scale of cultivated land reserve resources should be linked to the results of the second national land survey. The cultivated land included in the data on the potential scale of cultivated land reserve resources in the second national land survey should not be considered as cultivated land reserve resources;

[0030] By connecting with the highest flood level line, the data on the potential scale of arable land reserve resources involving the highest flood level line should not be used as arable land reserve resources;

[0031] Through overlay analysis with the construction land approval data of previous years, the data on the potential scale of arable land reserve resources is located in the layers of approval in previous years and is not suitable to be used as arable land reserve resources;

[0032] By connecting with the plan for mapping the advance spatial scale indicators, the data on the potential scale of arable land reserve resources involving permitted construction areas should not be used as arable land reserve resources;

[0033] Through overlay analysis with the layers of land consolidation projects implemented in previous years, the land consolidation projects implemented in the potential scale data of cultivated land reserve resources are not suitable to be regarded as cultivated land reserve resources;

[0034] Eliminate the areas in the data on the potential scale of cultivated land reserve resources that are smaller than the minimum upper map area.

[0035] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention evaluates the suitability of the cultivated land reserve resources in the survey base map by setting the cultivated land reserve resource evaluation index system; and screens out regional cultivated land reserve resource potential spots with the potential for forming cultivated land through the limiting factors, so as to evaluate and analyze the restoration potential of cultivated land reserve resources, form a scientific and effective regional cultivated land reserve resource plan, and promote the subsequent specific implementation plan. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a flow chart of the method for evaluating the restoration potential of reserve cultivated land resources. DETAILED DESCRIPTION

[0037] The above and other technical features and advantages of the present invention are described in more detail below with reference to the accompanying drawings.

[0038] Example 1

[0039] like Figure 1 As shown, Figure 1This is a flow chart of the method for evaluating the restoration potential of reserve cultivated land resources.

[0040] The method for evaluating the restoration potential of reserve cultivated land resources of the present invention comprises the following steps:

[0041] S1, prepare survey base map based on the annual land change survey results;

[0042] S2, constructing an evaluation index system for reserve cultivated land resources, and evaluating the suitability of the reserve cultivated land resources within the survey base map;

[0043] S3, based on limited factors and through internal screening and external verification, determine the potential map of arable land reserve resources.

[0044] Specifically, in step S1, based on the latest annual land change survey results and combined with the latest remote sensing images, land type patches that meet the requirements are selected as potential arable land reserve resource patches, and the survey base map is prepared.

[0045] The present invention evaluates the suitability of the cultivated land reserve resources in the survey base map by setting the cultivated land reserve resource evaluation index system; and screens out regional cultivated land reserve resource potential patches with the potential for forming cultivated land through the limiting factors, so as to evaluate and analyze the restoration potential of the cultivated land reserve resources, form a scientific and effective regional cultivated land reserve resource plan, and promote the subsequent specific implementation plan.

[0046] Example 2

[0047] In step S2, the arable land reserve resource evaluation index system is established by setting 10 evaluation indicators.

[0048] The evaluation indicators include ecological conditions, terrain slope, annual accumulated temperature, annual precipitation and irrigation conditions, soil texture, soil heavy metal pollution status, salinization degree, soil pH value, soil layer thickness, and farming convenience.

[0049] Specifically, the ecological conditions include whether the reserve resource land parcel is located outside the ecological protection red line or urban development boundary, or whether development will lead to land degradation or cause geological disasters that have a significant impact on the natural ecosystem. The three levels are: outside the ecological protection red line and urban development boundary, within the ecological protection red line and urban development boundary, and development will lead to land degradation or trigger geological disasters.

[0050] The terrain slope specifically refers to whether the terrain slope of the reserve resource plot is less than 25°, which is divided into two levels: ≤25° and >25°.

[0051] The annual accumulated temperature specifically refers to whether the reserve resource plot is located in an area with an annual effective accumulated temperature greater than 1800°C. It is divided into two levels: ≥1800°C and <1800°C.

[0052] The annual precipitation and irrigation conditions specifically refer to whether the reserve resource plot is located in an area with annual precipitation greater than or equal to 400 mm, or less than 400 mm but with irrigation conditions. This is categorized into three levels: ≥400 mm, <400 mm with irrigation conditions, and <400 mm without irrigation conditions. For areas with irrigation conditions less than 400 mm, the water resource status must be specified, including whether the irrigation water source is surface water or groundwater. For surface water irrigation, the name of the water source and the annual available water volume must be indicated.

[0053] The soil texture specifically refers to whether the reserve resource plot is gravelly soil or coarser soil. It is divided into two levels: loamy, clay or sandy, and gravelly or coarser.

[0054] The soil heavy metal pollution status specifically refers to whether the soil in the reserve resource plot is polluted. It is divided into two levels: green, yellow or red.

[0055] The degree of salinization specifically refers to whether the soil salinization level of the reserve resource plot is below severe and has irrigation and drainage conditions. It is divided into three levels: none, mild salinization, and moderate salinization. Severe salinization has irrigation and drainage conditions, and severe salinization has no irrigation and drainage conditions.

[0056] The soil pH value specifically refers to whether the pH value of the reserve resource plot is between 4.0 and 9.5, which is divided into two levels: 4.0-9.5, ≤4.0, or ≥9.5.

[0057] The soil layer thickness specifically refers to whether the reserve resource plot is greater than or equal to 60cm or has imported soil sources. It is divided into three levels: ≥60cm, <60cm with imported soil sources, and <60cm without imported soil sources.

[0058] The farming convenience level specifically refers to whether the reserve resource plot is easy to access for cultivation and whether it can be used sustainably. It is divided into two levels: easy to access and inconvenient to access.

[0059] Specifically, the 10 evaluation indicators are integrated to obtain a grading table of evaluation indicators for reserve cultivated land resources, as shown in Table 1 below.

[0060] Table 1 Evaluation index classification table of cultivated land reserve resources

[0061]

[0062]

[0063] Specifically, step S2 includes the following steps:

[0064] S21, collect and organize data;

[0065] Collecting arable land reserve resource evaluation index data related to the evaluation index;

[0066] S22, evaluation index vectorization;

[0067] The acquired arable land reserve resource evaluation index data is integrated and vectorized to obtain vector evaluation index data and evaluation index basic information to establish evaluation index vector data. The collected vector evaluation index data is matched with the land survey database based on the latest imagery. The collected paper maps and text descriptions of the evaluation index basic information are vectorized based on the latest annual land change survey database to form the evaluation index vector data.

[0068] S23, supplementary field survey;

[0069] If the existing data cannot meet the requirements of the investigation and evaluation work, including insufficient, untrue, unclear, outdated data, etc., a supplementary field investigation can be carried out, and vectorization work of the supplementary investigation can be carried out to supplement and improve the vector data of the evaluation indicators.

[0070] S24, carry out arable land suitability evaluation;

[0071] The evaluation index vector data is overlaid on the survey base map. Based on the results of resource and environmental carrying capacity and land and space development suitability assessments, and in accordance with the technical requirements of the arable land reserve resource database, the index value attributes are annotated for each plot within the survey base map. The suitability of each plot within the survey base map is evaluated for arable land suitability using the "restrictive factor" evaluation method (if any one of the indicators is a restrictive factor, the entire plot is evaluated as unsuitable for cultivation) in accordance with the arable land reserve resource evaluation index system and the requirements of the unsuitable for cultivation evaluation index table in Table 2 below.

[0072] Table 2 Evaluation index table of unsuitable cultivation

[0073]

[0074] Through the overlay analysis of the 10 evaluation indicators in a comprehensive region, areas where any one of the evaluation indicators does not meet the conditions for arable land are identified as unsuitable areas, and the rest are suitable areas, thus forming a regional arable land distribution map.

[0075] Example 3

[0076] The step S3 comprises the following steps:

[0077] S31, after deducting the unsuitable areas for cultivation from the potential arable land reserve resource patches in the survey base map, the potential scale data of arable land reserve resources are formed, based on the limiting factors, the potential arable land reserve resource patches that are not suitable for being arable land reserve resources are determined, combined with the latest remote sensing images, the patches that are not suitable for being classified as arable land reserve resources are eliminated, and the patches to be included in the field verification are preliminarily determined.

[0078] The limiting factors are the results of the second national land survey, the highest flood level, the data on construction land approval in previous years, the plan for mapping the pre-funded spatial scale indicators, the land consolidation projects implemented in previous years, and the minimum mapping requirements. The specific determination process is as follows:

[0079] Connect with the results of the second national land survey: Connect the data on the potential scale of cultivated land reserve resources with the results of the second national land survey. The data on the potential scale of cultivated land reserve resources involved in the second survey are cultivated land and should not be used as cultivated land reserve resources.

[0080] Connecting with the highest flood level line: By connecting with the highest flood level line, the highest flood level line involved in the potential scale data of cultivated land reserve resources is not suitable as cultivated land reserve resources.

[0081] Connecting with the construction land approval data of previous years: Through overlay analysis with the construction land approval data of previous years, the data on the potential scale of arable land reserve resources is located in the approval layers of previous years and is not suitable as arable land reserve resources.

[0082] Connection with the plan for mapping the advance space scale indicators: Through connection with the plan for mapping the advance space scale indicators, the potential scale data of cultivated land reserve resources involving permitted construction areas should not be used as cultivated land reserve resources.

[0083] Connection with the land consolidation projects that have been implemented in previous years: Through overlay analysis with the layers of land consolidation projects that have been implemented in previous years, the land consolidation projects that have been implemented in the potential scale data of cultivated land reserve resources are not suitable as cultivated land reserve resources.

[0084] In line with the minimum map requirements: in accordance with the requirements that the area of ​​compensation projects should be no less than 400 square meters and the area of ​​linked projects should be no less than 200 square meters, the areas with smaller areas than the minimum map area in the potential scale data of cultivated land reserve resources will be eliminated.

[0085] S32: Conduct internal analysis based on the latest remote sensing imagery and coordinate with local authorities. Select areas for planned field verification for the planned arable land reserve resource survey. These areas will be outlined on the map as arable land reserve resource areas to form a working base map for the arable land reserve resource survey. Based on the actual conditions of the region, areas such as major roads, important hydraulic construction sites, major waterways, and contiguous, difficult-to-remediate forests within the region should not be considered arable land reserve resource areas.

[0086] S33, based on the base map of the reserve cultivated land resources survey work, conduct field verification of the proposed survey plots of the reserve cultivated land resources determined by internal work, and confirm the location and scope of each plot (project) to determine the potential plots of reserve cultivated land resources.

[0087] Specifically, we will conduct field research based on discussions, interviews and on-site surveys, comprehensively consider the difficulty of project restoration and funding guarantees, and analyze and determine whether the map blocks can be used as reserve resources for arable land.

[0088] S34. Based on the actual situation of the reserve arable land resources, combined with the natural, transportation, water system and other conditions around the plots, and taking local conditions into consideration, the development and utilization direction of the potential map of the reserve arable land resources shall be reasonably determined. If the water source conditions are good, the land shall be transformed into paddy fields; if the water source conditions cannot meet the irrigation water demand, but the irrigation water demand can be met through farmland water conservancy supporting facilities such as ditches, the land shall be transformed into paddy fields first; if the conditions are not met, the land shall be transformed into irrigated land or dry land.

[0089] Based on the difficulty of implementing the reserve arable land resources, taking into account the actual conditions such as the local economic level and the wishes of the people, and after fully soliciting opinions from the group and local areas, a scientific schedule for the development and utilization of the reserve arable land resources will be formulated.

[0090] Through the evaluation and field investigation and verification of arable land reserve resources, its category, location, scope, area, planned development sequence, etc. are determined, data aggregation and analysis are carried out, and arable land reserve resource planning texts, maps, tables, databases and other results are compiled.

[0091] The above description is merely a preferred embodiment of the present invention and is intended to be illustrative rather than restrictive of the present invention. Those skilled in the art will appreciate that many changes, modifications, and even equivalents may be made to the present invention within the spirit and scope of the claims, all of which fall within the scope of protection of the present invention.

Claims

1. A method for evaluating the restoration potential of cultivated land reserve resources, characterized in that: Including steps: S1, prepare survey base map based on the annual land change survey results; S2, constructing an evaluation index system for reserve cultivated land resources to evaluate the suitability of the reserve cultivated land resources within the survey base map; S3, based on limited factors and through internal screening and external verification, determine the potential map of arable land reserve resources.

2. The method for evaluating the restoration potential of cultivated land reserve resources according to claim 1, wherein: In step S1, based on the latest annual land change survey results and combined with remote sensing images, land type patches that meet the requirements are selected as potential arable land reserve resource patches, and the survey base map is prepared.

3. The method for evaluating the restoration potential of cultivated land reserve resources according to claim 1, wherein: In step S2, the arable land reserve resource evaluation index system is established by setting 10 evaluation indicators; the evaluation indicators include ecological conditions, terrain slope, annual accumulated temperature, annual precipitation and irrigation conditions, soil texture, soil heavy metal pollution status, salinization degree, soil pH value, soil layer thickness, and farming convenience.

4. The method for evaluating the restoration potential of cultivated land reserve resources according to claim 3, wherein: The ecological conditions are divided into three levels: outside the ecological protection red line and urban development boundary, within the ecological protection red line and urban development boundary, and development that will lead to land degradation or trigger geological disasters; the terrain slope is divided into two levels: ≤25° and >25°; the annual accumulated temperature is divided into two levels: ≥1800℃ and <1800℃; the annual precipitation and irrigation conditions are divided into three levels: ≥400mm, <400mm with irrigation conditions, and <400mm without irrigation conditions. The water resource status is explained in the level of <400mm with irrigation conditions. The irrigation water source is surface water / groundwater irrigation. For surface water irrigation, the name of the water source and the annual precipitation are indicated. Water consumption; in the soil texture, it is divided into two levels: loam, clay or sand, and gravel or coarser texture; in the soil heavy metal pollution status, it is divided into two levels: green, yellow or red; in the salinization degree, it is divided into three levels: none, mild salinization and moderate salinization, severe salinization with irrigation and drainage conditions, and severe salinization without irrigation and drainage conditions; in the soil pH value, it is divided into two levels: 4.0-9.5, ≤4.0 or ≥9.5; in the soil layer thickness, it is divided into three levels: ≥60cm, <60cm with foreign soil source, and <60cm without foreign soil source; in the farming convenience, it is divided into two levels: easy to reach and inconvenient to reach.

5. The method for evaluating the restoration potential of cultivated land reserve resources according to claim 4, wherein: In the step S2, the steps are included: S21, collect and organize data; Collecting arable land reserve resource evaluation index data related to the evaluation index; S22, evaluation index vectorization; Integrating and vectorizing the acquired arable land reserve resource evaluation index data to establish evaluation index vector data; S23, supplementary field survey; Supplement the evaluation index vector data by conducting additional field surveys and carrying out vectorization work for the additional surveys; S24, carry out arable land suitability evaluation; The evaluation index vector data is superimposed on the survey base map, and the index value attributes of the map blocks in the survey base map are marked one by one. According to the requirements of the arable land reserve resource evaluation index system and the unsuitable for cultivation evaluation index table, the restrictive factor evaluation method is used to evaluate the suitability of the map blocks in the survey base map one by one.

6. The method for evaluating the restoration potential of cultivated land reserve resources according to claim 5, wherein: In the evaluation index table of unsuitable cultivation, in the ecological conditions, if the land is located within the ecological protection red line and the urban development boundary, and the development will lead to land degradation or cause geological disasters, it is evaluated as unsuitable cultivation; in the terrain slope, if it is located within the level of >25°, it is evaluated as unsuitable cultivation; in the annual accumulated temperature, if it is located within the level of <1800℃, it is evaluated as unsuitable cultivation; in the annual precipitation and irrigation conditions, if it is located within the level of precipitation <400mm and no irrigation conditions, it is evaluated as unsuitable cultivation; in the soil texture, if it is located within the level of gravel soil or coarser texture, it is evaluated as unsuitable cultivation; in the soil heavy metal pollution, if it is located within the level of gravel soil or coarser texture, it is evaluated as unsuitable cultivation. In the conditions, if it is at the yellow or red level, it is evaluated as unsuitable for cultivation; in the salinization degree, if it is at the level of severe or above and there is no irrigation and drainage conditions, it is evaluated as unsuitable for cultivation; in the soil pH value, if it is at the level of pH ≥ 9.5 or ≤ 4.0, it is evaluated as unsuitable for cultivation; in the soil layer thickness, if it is at the level of < 60 cm and there is no foreign soil source, it is evaluated as unsuitable for cultivation; in the farming convenience, if it is at the level of inconvenient to reach, it is evaluated as unsuitable for cultivation; if any of the evaluation indicators in the indicator value attributes of the map spots in the survey base map reaches the unsuitable for cultivation conditions, it is divided into unsuitable for cultivation areas, and the rest are suitable for cultivation areas.

7. The method for evaluating the restoration potential of cultivated land reserve resources according to claim 6, wherein: In the step S3, the steps are included: S31, after deducting the unsuitable arable land areas from the potential arable land reserve resource spots in the survey base map, to generate arable land reserve resource potential scale data, based on the limiting factors, determine the potential arable land reserve resource spots that are not suitable for being arable land reserve resources, and in combination with the remote sensing image, eliminate spots that are not suitable for being classified as arable land reserve resources, and preliminarily determine spots to be included in the field verification; S32, performing an internal analysis in combination with the remote sensing image, selecting the areas to be surveyed for the cultivated land reserve resources from the areas to be included in the field verification, and outlining the areas on the map in the form of cultivated land reserve resource areas to form a base map for the cultivated land reserve resource survey; S33, based on the cultivated land reserve resource survey working base map, conducting field verification of the cultivated land reserve resource survey plots determined internally, confirming the location and scope of each plot, so as to determine the cultivated land reserve resource potential plots; S34. Based on the actual situation of the reserve arable land resources and the surrounding conditions of the land parcels, the development and utilization direction of the potential map of the reserve arable land resources shall be reasonably determined. If the water source conditions are good, the land shall be transformed into paddy fields; if the water source conditions cannot meet the irrigation water demand, but the irrigation water demand can be met through the supporting farmland water conservancy facilities, the land shall be transformed into paddy fields first; if the conditions are not met, the land shall be transformed into irrigated land or dry land.

8. The method for evaluating the restoration potential of cultivated land reserve resources according to claim 7, wherein: In step S31, the limiting factors are the results of the second land survey, the highest flood level, the data on construction land approval in previous years, the plan for mapping the pre-paid spatial scale indicators, the land consolidation projects implemented in previous years, and the minimum mapping requirements. The determination process is as follows: The data on the potential scale of cultivated land reserve resources should be linked to the results of the second national land survey. Land that was included in the second national land survey in the data on the potential scale of cultivated land reserve resources should not be considered as cultivated land reserve resources. By connecting with the highest flood level line, the data on the potential scale of arable land reserve resources involving the highest flood level line should not be used as arable land reserve resources; Through overlay analysis with the construction land approval data of previous years, the data on the potential scale of arable land reserve resources located in the layers of previous years' approval should not be regarded as arable land reserve resources; By connecting with the plan for mapping the advance spatial scale indicators, the data on the potential scale of arable land reserve resources involving areas where construction is permitted should not be used as arable land reserve resources; Through overlay analysis with the layers of land consolidation projects implemented in previous years, the land consolidation projects implemented in the potential scale data of cultivated land reserve resources should not be regarded as cultivated land reserve resources; Eliminate the areas in the data on the potential scale of cultivated land reserve resources that are smaller than the minimum upper map area.

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