Ecological restoration and carbon sink coordination evaluation method, device and system and storage medium

Abstract

The invention discloses an ecological restoration and carbon sink coordination evaluation method and device, a system and a storage medium. The method comprises the following steps: S1, identifying an ecological restoration region and starting time thereof; s2, generating NPP data according to the MODIS product data and the meteorological data; and S3, evaluating ecological restoration and carbon sink coordination according to the ecological restoration area and the starting time and NPP data thereof. By adopting the technical scheme provided by the invention, the coordination or conflict relationship between ecological restoration and carbon sink improvement can be accurately evaluated.

Description

Technical Field

[0001] The present invention belongs to the technical field of ecological restoration, and in particular relates to an ecological restoration and carbon sink coordination evaluation method and device, system, and storage medium. Background Art

[0002] The increase in greenhouse gas emissions has caused the global average surface temperature to rise by more than 1°C compared to pre-industrial levels. Climate warming has intensified ecosystem pressures, triggering a series of ecological crises such as rising sea levels, frequent extreme weather and loss of biodiversity, and posing a huge threat to human health and well-being. In order to meet the challenges of climate change, greenhouse gas concentrations need to be kept at a stable level, and this goal can be achieved through the role of carbon sinks. Natural climate solutions (NCS) as a land management strategy to address climate change provide a safe and cost-effective way to store CO in the atmosphere. 2 ; Improving carbon sequestration capacity by optimizing land use patterns has become one of the key strategies for addressing climate change.

[0003] In the context of the current complex succession of natural and social systems, it is particularly important to clarify the carbon sequestration benefits of ecological restoration projects and clarify the coordination between ecological restoration implementation and carbon sink benefits. This will not only help optimize current ecological restoration measures and future planning, but also have far-reaching significance for global climate governance and regional sustainable development.

[0004] Current ecological restoration mainly affects the carbon cycle process of terrestrial ecosystems by changing the original land cover pattern. Most existing studies focus on analyzing carbon sink changes throughout the study period, and pay less attention to the impact of the start time of restoration. In addition, the coordinated development of ecological restoration and carbon sink functions is crucial, but research on the dynamic relationship between the two is still insufficient. In the current context of complex succession of natural and social systems, it is particularly important to clarify the coordinated relationship between ecological restoration implementation and carbon sinks. This will not only help optimize current ecological restoration measures and future planning, but also have far-reaching significance for global climate governance and regional sustainable development. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a method and device, system and storage medium for evaluating the coordination between ecological restoration and carbon sink.

[0006] To achieve the above object, the present invention adopts the following technical solution:

[0007] A method for evaluating the coordination between ecological restoration and carbon sink, comprising:

[0008] Step S1, identifying the area of ​​ecological restoration and its starting time;

[0009] Step S2, generating NPP data according to MODIS product data and meteorological data;

[0010] Step S3: Evaluate the coordination between ecological restoration and carbon sink based on the ecological restoration area, its starting time and NPP data.

[0011] Preferably, in step S1, a land cover type change detector is used to identify the area and starting year of ecological restoration.

[0012] Preferably, step S3 comprises:

[0013] The slope of NPP change of each ecological restoration pixel from the beginning year of restoration to the end of the preset period was calculated, and the average value was taken at the regional scale to characterize the change characteristics of regional carbon sinks;

[0014] Based on the annual ecological land area of ​​the region, the slope of change is calculated to quantify the scale change of ecological restoration;

[0015] According to the changing characteristics of regional carbon sinks and the scale changes of ecological restoration, the coordination or conflict relationship between carbon sink enhancement and ecological land scale expansion in the process of ecological restoration is obtained.

[0016] The present invention also provides an ecological restoration and carbon sink coordination evaluation device, comprising:

[0017] Identification module, used to identify the area of ​​ecological restoration and its starting time;

[0018] A generation module is used to generate NPP data based on MODIS product data and meteorological data;

[0019] The evaluation module is used to evaluate the coordination between ecological restoration and carbon sink based on the area of ​​ecological restoration, its starting time and NPP data.

[0020] Preferably, the identification module uses a land cover type change detector to identify the area and starting year of ecological restoration.

[0021] Preferably, the evaluation module includes:

[0022] The first calculation unit is used to calculate the NPP change slope of each ecological restoration pixel from the restoration start year to the end of the preset period, and take the average value at the regional scale to characterize the change characteristics of the regional carbon sink;

[0023] The second calculation unit is used to calculate the change slope based on the annual ecological land area in the region to quantify the scale change of ecological restoration;

[0024] The third calculation unit is used to obtain the coordination or conflict relationship between the carbon sink enhancement and the ecological land scale expansion in the process of ecological restoration according to the changing characteristics of the regional carbon sink and the scale change of ecological restoration.

[0025] The present invention also provides an ecological restoration and carbon sink coordination evaluation system, comprising: a memory and a processor, wherein the memory stores a computer program run by the processor, and the computer program executes an ecological restoration and carbon sink coordination evaluation method when run by the processor.

[0026] The present invention also provides a storage medium, on which a computer program is stored, and the computer program executes the ecological restoration and carbon sink coordination evaluation method when running.

[0027] The present invention identifies the ecological restoration area and its starting time; generates NPP data based on MODIS product data and meteorological data; and obtains the ecological restoration-carbon sink coordination index based on the ecological restoration area and its starting time and NPP data. The technical solution of the present invention can accurately evaluate the coordination or conflict relationship between ecological restoration and carbon sink enhancement. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0029] Figure 1 This is a flow chart of the method for evaluating the coordination of ecological restoration and carbon sinks according to an embodiment of the present invention;

[0030] Figure 2 Provide a schematic diagram for ecological restoration area identification;

[0031] Figure 3 This is a schematic diagram of the NPP calculation process;

[0032] Figure 4 Schematic diagram for evaluating the coordination between ecological restoration and carbon sequestration. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] Embodiment 1:

[0036] like Figure 1 As shown, an embodiment of the present invention provides a method for evaluating the coordination between ecological restoration and carbon sink, including:

[0037] Step S1, identifying the area of ​​ecological restoration and its starting time;

[0038] Step S2, generating NPP data according to MODIS product data and meteorological data;

[0039] Step S3: Evaluate the coordination between ecological restoration and carbon sink based on the ecological restoration area, its starting time and NPP data.

[0040] As an implementation of an embodiment of the present invention, in step S1, a land cover type change detector is used to identify the area and starting year of ecological restoration.

[0041] Furthermore, the expansion or addition of ecological land can be used as a direct reflection of the implementation of ecological restoration, and the ecological restoration area can be identified by monitoring the growth of ecological land. Considering that most major ecological restoration projects are aimed at increasing ecological land, agricultural land and bare land without vegetation cover are restored to land use types such as forests, grasslands, and waters that promote the sustainability of ecosystems. Therefore, the embodiment of the present invention defines ecological land as forest land, grassland, and waters, excluding agricultural land and construction land and bare land that bear production and living functions. The land cover type change detector is a practical tool for detecting stable changes in land use types within a preset period of time. The detector is based on the trajectory change detection method and uses a 5-year moving window to analyze the land use time series. The pixel codes of the types of forest land, grassland, and water in the land use time series are set to 1, 2, and 3 in sequence, and the pixel codes of non-ecological land are set to 0. Taking forest ecological restoration as an example, if a non-ecological land pixel 0 becomes a forest pixel 1, and does not change for four consecutive years, it is considered that the pixel is stably converted into a forest ecological land, and the first year of conversion to a forest pixel is defined as the starting year for implementing ecological restoration. Similarly, according to these rules, the areas converted to other types of ecological restoration and the corresponding starting periods of ecological restoration are identified, such as Figure 2 shown.

[0042] As an implementation of an embodiment of the present invention, in step S2, the calculation process of NPP data using the CASA model is shown in Table 1.

[0043] Table 1

[0044]

[0045] Among them, NDVI data is obtained through format conversion, image stitching, projection conversion, mask extraction and other preprocessing of MODIS data product MOD13A3 provided by NASA (http: / / lpdaac.usgs.gov), with a temporal resolution of 1 month and a spatial resolution of 1 km. Vegetation type data uses MODIS MCD12Q1 products with a resolution of 500 meters per year from 2001 to 2022, resampled to 1 km; this vegetation type data is based on the classification of the International Geosphere-Biosphere Program (IGBP), covering 17 major vegetation types, such as Figure 3 shown.

[0046] As an implementation method of an embodiment of the present invention, in step S3, an Ecological Restoration Carbon Sequestration Coordination Index (ECCI) is constructed in combination with the scale expansion and service improvement effects of ecological restoration to systematically evaluate the coordination between ecological restoration and its carbon sink dynamics. Specifically, the NPP change slope of each ecological restoration pixel from the start year of restoration to the end of the preset period is first calculated, and the average value is taken on a regional scale to characterize the change characteristics of the regional carbon sink. Secondly, based on the annual ecological land area of ​​the region, its change slope is calculated to quantify the scale change of ecological restoration. In order to ensure the consistency and comparability of the dimensions between different indicators, the two types of change slopes are normalized to retain the positive and negative signs. Finally, the ratio relationship between the two is constructed to reveal the coordination or conflict relationship between the carbon sink improvement and the expansion of the scale of ecological land in the process of ecological restoration. Here, we use the Theil-Sen trend analysis method to calculate the change slope. This method is widely used in trend detection due to its robustness to outliers and its applicability to non-normal distribution data. The specific calculation formula is as follows:

[0047]

[0048] Among them, βNPP i is the NPP change slope of ecological restoration pixel i in the region, NPP i,k and NPP i,j are the NPP values ​​of pixel i at time k and j, respectively, and t ec is the restoration start year, t 0 and t 1 are the preset start and end time periods, βNPP is the mean slope of NPP change of ecological restoration pixels in the region, n is the total number of ecological restoration pixels in the region, βER represents the slope of change of regional ecological land area from time k to time j, and ER k and ER j are the ecological land areas of the region at time k and j respectively. The normalized βNPP and βER are expressed as β* NPP and β * ER represents. In the present invention, LCTCD monitoring uses a 5-year time window. When the monitoring result in the first year is non-ecological land, and the monitoring result in the second year is converted to a certain type of ecological land, the monitoring results in the subsequent third to fifth years must all be this type of ecological land to determine that ecological restoration has occurred stably. Among them, the occurrence time of ecological restoration is defined as the second year, so t 2 = Default period end year - 3 years.

[0049] Based on the ECCI calculation results, the relationship between ecological restoration and carbon sink can be divided into strong coordination, weak coordination, equilibrium, weak conflict and strong conflict. If the growth of the ecological restoration area is accompanied by the growth of NPP, the ecological restoration-carbon sink system is considered to be in a coordinated state, otherwise it is in a conflict state. When the growth rate of the ecological restoration area triggers a higher positive or negative change rate of NPP, that is, |ECCI|≥1, it is judged to be a strong relationship; otherwise, it is a weak relationship. In addition, if |ECCI|<0.05, it is considered that the impact of ecological restoration on NPP is not significant, or the positive and negative effects offset each other. At this time, the system is in equilibrium, such as Figure 4 shown.

[0050] Embodiment 2:

[0051] The embodiment of the present invention also provides an ecological restoration and carbon sink coordination evaluation device, comprising:

[0052] Identification module, used to identify the area of ​​ecological restoration and its starting time;

[0053] A generation module is used to generate NPP data based on MODIS product data and meteorological data;

[0054] The evaluation module is used to evaluate the coordination between ecological restoration and carbon sink based on the area of ​​ecological restoration, its starting time and NPP data.

[0055] As an implementation method of the embodiment of the present invention, the identification module uses a land cover type change detector to identify the area and starting year of ecological restoration.

[0056] As an implementation of the embodiment of the present invention, the evaluation module includes:

[0057] The first calculation unit is used to calculate the NPP change slope of each ecological restoration pixel from the restoration start year to the end of the preset period, and take the average value at the regional scale to characterize the change characteristics of the regional carbon sink;

[0058] The second calculation unit is used to calculate the change slope based on the annual ecological land area in the region to quantify the scale change of ecological restoration;

[0059] The third calculation unit is used to obtain the coordination or conflict relationship between the carbon sink enhancement and the ecological land scale expansion in the process of ecological restoration according to the changing characteristics of the regional carbon sink and the scale change of ecological restoration.

[0060] Embodiment 3:

[0061] An embodiment of the present invention also provides an ecological restoration and carbon sink coordination evaluation system, comprising: a memory and a processor, wherein the memory stores a computer program run by the processor, and the computer program executes an ecological restoration and carbon sink coordination evaluation method when run by the processor.

[0062] Embodiment 4:

[0063] An embodiment of the present invention further provides a storage medium having a computer program stored thereon, and the computer program executes the method for evaluating the coordination between ecological restoration and carbon sink when running.

[0064] The embodiments described above are only descriptions of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A method for evaluating the coordination between ecological restoration and carbon sink, characterized in that: include: Step S1, identifying the area of ​​ecological restoration and its starting time; Step S2, generating NPP data according to MODIS product data and meteorological data; Step S3: Evaluate the coordination between ecological restoration and carbon sink based on the ecological restoration area, its starting time and NPP data.

2. The method for evaluating the coordination of ecological restoration and carbon sink according to claim 1, characterized in that: In step S1, a land cover type change detector is used to identify the area and starting year of ecological restoration.

3. The method for evaluating the coordination of ecological restoration and carbon sink according to claim 2, characterized in that: Step S3 includes: The slope of NPP change of each ecological restoration pixel from the beginning year of restoration to the end of the preset period was calculated, and the average value was taken at the regional scale to characterize the change characteristics of regional carbon sinks; Based on the annual ecological land area of ​​the region, the slope of change is calculated to quantify the scale change of ecological restoration; According to the changing characteristics of regional carbon sinks and the scale changes of ecological restoration, the coordination or conflict relationship between carbon sink enhancement and ecological land scale expansion in the process of ecological restoration is obtained.

4. An ecological restoration and carbon sink coordination evaluation device, characterized in that: include: Identification module, used to identify the area of ​​ecological restoration and its starting time; A generation module is used to generate NPP data based on MODIS product data and meteorological data; The evaluation module is used to evaluate the coordination between ecological restoration and carbon sink based on the area of ​​ecological restoration, its starting time and NPP data.

5. The ecological restoration and carbon sink coordination evaluation device according to claim 4, characterized in that: The recognition module uses a land cover type change detector to identify the area and starting year of ecological restoration.

6. The ecological restoration and carbon sink coordination evaluation device according to claim 5, characterized in that: The assessment modules include: The first calculation unit is used to calculate the NPP change slope of each ecological restoration pixel from the restoration start year to the end of the preset period, and take the average value at the regional scale to characterize the change characteristics of the regional carbon sink; The second calculation unit is used to calculate the change slope based on the annual ecological land area in the region to quantify the scale change of ecological restoration; The third calculation unit is used to obtain the coordination or conflict relationship between the carbon sink enhancement and the ecological land scale expansion in the process of ecological restoration according to the changing characteristics of the regional carbon sink and the scale change of ecological restoration.

7. An ecological restoration and carbon sink coordination evaluation system, characterized in that: include: A memory and a processor, wherein the memory stores a computer program executed by the processor, and when the computer program is executed by the processor, the method for evaluating the coordination between ecological restoration and carbon sink as described in any one of claims 1 to 3 is executed.

8. A storage medium, characterized in that: The storage medium stores a computer program, which, when running, executes the method for evaluating the coordination between ecological restoration and carbon sink as described in any one of claims 1 to 3.

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