Economic feasibility evaluation method and system for carbon sequestration and emission reduction measures

Abstract

The invention discloses a method and a system for evaluating economic feasibility of carbon sequestration and emission reduction measures, and belongs to the technical field of ecological system carbon sequestration and emission reduction. The evaluation method is carried out according to the following steps: the economic feasibility of carbon sequestration and emission reduction measures meeting the following formula I or the following formula II is realized; the REW-CTW-DPCgt is selected from the group consisting of 0 formula I; and REC-CTC + IPCgt; 0 formula II; in the formula I, REW is the economic benefit of returning to wet and clean income and expenditure, and the dimension is yuan / ha; cTW is the cost benefit of returning to humidity by returning to ploughing, and the dimension is yuan / ha; dPC is grain output reduction loss, and the dimension is yuan / ha; in the formula II, REC is the economic benefit of wetland reclamation, and the dimension is yuan / ha; cTC is reclamation economic cost, and the dimension is yuan / ha; iPC is the economic benefit of increasing the yield of the new farmland, and the dimension is Yuan / ha. A plurality of wetland field verifications prove that the evaluation method and system are reliable, effective and accurate.

Description

Technical Field

[0001] This invention belongs to the field of ecosystem carbon sequestration and emission reduction technology, specifically relating to a method and system for assessing the economic feasibility of carbon sequestration and emission reduction measures. Background Technology

[0002] Ecosystem carbon sequestration is a low-cost and effective method for carbon reduction. While a measure may have net emission reduction potential and meet technical constraints, its feasibility as a carbon sequestration measure is also limited by economic factors. To achieve the Nationally Determined Contributions (NDCs) for addressing climate change, it is increasingly urgent to transform carbon sequestration technologies from scientific concepts into practical measures, with particular emphasis placed on the feasibility of carbon sequestration effects in specific terrestrial ecosystems. When economic constraints are considered, the scope of feasible carbon sequestration measures narrows, especially since some ecosystem carbon sequestration measures with emission reduction effects are often economically infeasible. Whether wetland reclamation and conversion of farmland to wetlands can be considered economically feasible carbon sequestration measures remains unclear. In-depth exploration of the economic feasibility of carbon sequestration measures can provide practical and applied evidence for ecosystem management aimed at emission reduction and carbon sequestration enhancement.

[0003] Current research on ecosystem net carbon budget is extensive, but there is a lack of assessment methods and systems for the economic feasibility of carbon sequestration and emission reduction measures that take into account net budget. Therefore, there is an urgent need for an economic feasibility method for carbon sequestration and emission reduction measures, to study the net greenhouse gas budget of this important transformation, and to provide practical and applied guidance for implementing effective ecosystem emission reduction and carbon sequestration control measures. Summary of the Invention

[0004] To address the technical problem of lacking a method and system for assessing the economic feasibility of carbon sequestration and emission reduction measures that consider net income and expenditure, and to provide practical and application guidance for implementing effective ecosystem emission reduction and carbon sequestration control measures, this invention provides a method and system for assessing the economic feasibility of carbon sequestration and emission reduction measures.

[0005] The technical solution of the present invention is as follows: An economic feasibility assessment method for carbon sequestration and emission reduction measures, which is carried out according to the following steps: carbon sequestration and emission reduction measures that satisfy Formula I or Formula II are economically feasible; REW - CTW - DPC >0 Formula I REC - CTC + IPC >0 Formula II; In formula I, REW The net income and expenditure economic benefits of converting farmland back to wetlands are measured in yuan / ha. CTWThe cost-effectiveness of converting farmland back to wetlands is measured in yuan / ha; DPC The loss due to reduced grain production is expressed in yuan / ha. In formula II, REC The economic benefits of wetland reclamation are expressed in yuan / ha. CTC The economic cost of land reclamation is expressed in yuan / ha. IPC The economic benefits of increased production from newly converted farmland are measured in yuan / ha.

[0006] 2. The method for assessing the economic feasibility of a carbon sequestration and emission reduction measure according to claim 1, characterized in that the net economic benefits of converting farmland back to wetlands are... REW Calculate using the following formula (1): (1); In equation (1), PNGCW The carbon sequestration amount of land converted from farmland to wetland is expressed in t / ha. P C The price is for carbon credits, expressed in yuan / ton. Cost-effectiveness of converting farmland back to wetlands CTW Calculate using the following formula (2): (2); In equation (2), CW The cost of converting farmland back to wetlands is expressed in yuan per ha. CMD The amount of reduction in farmland management costs is expressed in yuan / ha. Grain production losses DPC Calculate using the following formula (3): (3) In equation (3), DP The reduction in yield per unit area of ​​farmland, expressed in t / ha; C C The price is for agricultural products, expressed in yuan / ton.

[0007] Economic benefits of wetland reclamation REC Calculate using the following formula (4): (4) In equation (4), PNGWC The net income and expenditure of land reclamation is expressed in t / ha. P C The price is for carbon credits, expressed in yuan / ton. Total cost of land reclamation CTC Calculate using the following formula (5): (5) In equation (5),CC The cost of land reclamation is expressed in yuan / ha. CM The cost of managing newly converted farmland is expressed in yuan / ha. Increased economic benefits from newly converted farmland IPC Calculate using the following formula (6): (6) In equation (6), IP The yield of grain in newly converted farmland is expressed in tons per ha (t / ha). C C The price is for agricultural products, expressed in yuan / ton.

[0008] The economically feasible carbon sequestration and emission reduction measure that satisfies Formula I is to convert farmland back to wetlands; The economically feasible carbon sequestration and emission reduction measure that satisfies Formula II is land reclamation.

[0009] A computer-readable storage medium, wherein the computer program, when executed by a processor, implements a method for assessing the economic feasibility of a carbon sequestration and emission reduction measure.

[0010] An economic feasibility assessment system for carbon sequestration and emission reduction measures, comprising: a computing unit; the computing unit comprising: the aforementioned computer-readable storage medium.

[0011] The data mainline is equipped with a computing unit; the computing unit includes the computer-readable storage medium as described in claim 5.

[0012] The main data path also includes a database and a data query unit located upstream of the computing unit, connected in sequence; the data query unit retrieves data from the database and outputs it to the computing unit.

[0013] The database includes: carbon credit prices. P C Database, Costs of converting farmland back to wetlands CW Database, reduction in farmland management costs CMD Database, yield reduction per unit area of ​​farmland DP Database, crop prices C C Database, reclamation costs CC Database, management costs of newly converted farmland CM Database, Grain Yield of Newly Converted Farmland IP database.

[0014] Carbon credit price P C The database stores or links to data disclosed on the "State and Trends of Carbon Pricing 2025" website; The cost of converting farmland back to wetlands CW Database, reduction in farmland management costs CMD Database, yield reduction per unit area of ​​farmland DP Database, crop prices C C Database, reclamation costs CC Database, management costs of newly converted farmland CM Database, Grain Yield of Newly Converted Farmland IP The database stores data recorded in the "Compilation of Cost and Benefit Data of Agricultural Products Nationwide".

[0015] The beneficial effects of this invention are as follows: This invention proposes for the first time a method and system for assessing the economic feasibility of carbon sequestration and emission reduction measures. It fills the gap in existing technologies by lacking methods and systems for assessing the economic feasibility of carbon sequestration and emission reduction measures that consider net income and expenditure. It provides practical and applied guidance for implementing effective ecosystem emission reduction and sequestration regulation measures, and outputs accurate and effective assessment results for evaluating the feasibility of specific carbon sequestration and emission reduction measures such as returning farmland to wetlands and land reclamation in ecological practice, as well as determining which specific carbon sequestration and emission reduction measures to implement. The method and system for assessing the economic feasibility of carbon sequestration and emission reduction measures in this invention were applied to Hengshui Lake Wetland, Sanjiang Plain Wetland, and Momoge Wetland. The assessment results obtained from these three specific wetlands yielded results on the feasibility of carbon sequestration and emission reduction measures and on which carbon sequestration and emission reduction measures could ultimately be adopted. These results are consistent with previously reported actual application results of carbon sequestration and emission reduction measures in these three wetlands, fully demonstrating the reliability, effectiveness, and accuracy of the method and system for assessing the economic feasibility of carbon sequestration and emission reduction measures in this invention. Attached Figure Description

[0016] Figure 1 This is a flowchart illustrating the economic feasibility assessment method for the carbon sequestration and emission reduction measures of the present invention. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to specific embodiments and experimental examples, but this does not limit the scope of protection of the present invention.

[0018] Group 1 Examples: Economic Feasibility Assessment Method for the Carbon Sequestration and Emission Reduction Measures of the Present Invention This set of embodiments provides a method for evaluating the economic feasibility of carbon sequestration and emission reduction measures. All embodiments in this set share the following common feature: carbon sequestration and emission reduction measures that satisfy either Formula I or Formula II are economically feasible. REW - CTW - DPC >0 Formula I REC -CTC + IPC >0 Formula II; In formula I, REW The net income and expenditure economic benefits of converting farmland back to wetlands are measured in yuan / ha. CTW The cost-effectiveness of converting farmland back to wetlands is measured in yuan / ha; DPC The loss due to reduced grain production is expressed in yuan / ha. In formula II, REC The economic benefits of wetland reclamation are expressed in yuan / ha. CTC The economic cost of land reclamation is expressed in yuan / ha. IPC The economic benefits of increased production from newly converted farmland are measured in yuan / ha.

[0019] In some embodiments, the net economic benefits of converting farmland back to wetlands REW Calculate using the following formula (1): (1); In equation (1), PNGCW The carbon sequestration amount of land converted from farmland to wetland is expressed in t / ha. P C The price is for carbon credits, expressed in yuan / ton. Cost-effectiveness of converting farmland back to wetlands CTW Calculate using the following formula (2): (2); In equation (2), CW The cost of converting farmland back to wetlands is expressed in yuan per ha. CMD The amount of reduction in farmland management costs is expressed in yuan / ha. Grain production losses DPC Calculate using the following formula (3): (3) In equation (3), ​ The reduction in yield per unit area of ​​farmland, expressed in t / ha; C C The price is for agricultural products, expressed in yuan / ton.

[0020] In some embodiments, "returning farmland to wetlands" has the conventional technical meaning known to those skilled in the art. For example, it can be the meaning of "returning farmland to wetlands" as recorded in the article "Trends of Wetland Changes in China from 2000 to 2020 and Area Conversion Between Wetlands and Farmland". The area of ​​farmland returned to wetlands can be calculated from data in the "China Ecosystem Assessment and Ecological Security Database".

[0021] The net income and expenditure economic benefits have the conventional technical meaning known to those skilled in the art. For example, it can be consistent with the meaning of the term "economic benefits of greenhouse gas emission reduction" recorded in the article "Study on the Soil Carbon Sequestration Potential and Feasibility of Chemical Nitrogen Fertilizer Application and Straw Return to the Field in Chinese Farmland". It can be calculated by formula (1) of the present invention.

[0022] Cost-effectiveness of converting farmland back to wetlands ​ It has the conventional technical meaning known to those skilled in the art. For example, it can be the meaning of "cost-effectiveness of returning farmland to wetlands" as recorded in the article "Research on Ecological Compensation Mechanism of Returning Farmland to Wetlands in the South Four Lakes Basin". It can be calculated by formula (2) of the present invention.

[0023] Grain production losses ​ It has the conventional technical meaning known to those skilled in the art. For example, it can mean the meaning of "grain yield reduction loss" recorded in the article "Analysis of Environmental Impact Losses from Irrigation of Farmland in Suburbs of Beijing". It can be calculated by formula (3) of the present invention.

[0024] The carbon sequestration amount of returning farmland to wetland has a conventional technical meaning known to those skilled in the art. For example, it can be consistent with the meaning of the term "carbon sequestration amount of returning farmland to lake" recorded in the Chinese invention patent 202410851237.4 "A method and system for calculating net greenhouse gas budget NGB of wetland". It can be calculated by formula (8) recorded in the article "A method and system for calculating net greenhouse gas budget NGB of wetland".

[0025] Carbon credit price P C It has a conventional technical meaning known to those skilled in the art. For example, it could mean the term "carbon credit price" as recorded in the article "Current Status and Prospects of Carbon Capture and Storage (CCS) in the International Carbon Market," which can be found on the World Bank's website "State and Trends of Carbon Pricing 2025" or in its database.

[0026] The cost of converting farmland back to wetlands ​ It has a conventional technical meaning known to those skilled in the art. For example, it could mean the "cost of returning farmland to wetlands" as recorded in the "Research on the Ecological Compensation Mechanism of the Project of Returning Farmland to Wetlands in the South Four Lakes Basin", which can be obtained by querying the data recorded in the article "Compilation of National Agricultural Product Cost and Benefit Data".

[0027] The reduction in farmland management costs ​ It has the conventional technical meaning well known to those skilled in the art; for example, it could be the "reduction of agricultural production costs by 4.562 billion yuan per year" mentioned in the article "Study on the Soil Carbon Sequestration Potential and Feasibility of Chemical Nitrogen Fertilizer Application and Straw Return to the Field in Chinese Farmland".-1 The meaning of the term "reducing agricultural production costs" in the entry is consistent and can be found by querying the data recorded in the article "Compilation of National Agricultural Product Cost and Benefit Data".

[0028] Reduced yield per unit area of ​​farmland ​ It has a conventional technical meaning known to those skilled in the art. For example, it can be consistent with the meaning of the term "decline in yield per unit area" recorded in the article "An Empirical Evidence of the Decline in Farmland Yield per Unit Area in Modern Northeast China" and can be obtained by querying the data recorded in the article "Compilation of National Agricultural Product Cost and Benefit Data".

[0029] Crop prices C C It has a conventional technical meaning known to those skilled in the art. For example, it could mean the term "crop price" as recorded in the article "A Simulation Study on the Effect of Hainan Natural Rubber Income Insurance Based on Expected Utility Theory," which can be obtained by querying data recorded in the article "Compilation of National Agricultural Product Cost and Benefit Data."

[0030] Reclamation has a conventional technical meaning known to those skilled in the art. For example, it can be the meaning of "reclamation" as recorded in the article "The Impact of Coastal Reclamation Development Intensity on Waterbird Populations and Habitat Suitability - A Case Study of Yancheng Wetland", or it can be the meaning of the word "reclamation" in the Baidu Encyclopedia entry.

[0031] Wetland reclamation has the conventional technical meaning known to those skilled in the art. For example, it can be the meaning of "wetland reclamation" as recorded in the article "Wetland Change Trends in China from 2000 to 2020 and Area Conversion between Wetlands and Farmland".

[0032] In other embodiments, the economic benefits of wetland reclamation ​ Calculate using the following formula (4): (4) In equation (4), ​ The net income and expenditure of land reclamation is expressed in t / ha. P C The price is for carbon credits, expressed in yuan / ton. Total cost of land reclamation ​ Calculate using the following formula (5): (5) In equation (5), ​ The cost of land reclamation is expressed in yuan / ha. ​ The cost of managing newly converted farmland is expressed in yuan / ha. Increased economic benefits from newly converted farmland ​ Calculate using the following formula (6): (6) In equation (6), ​ The yield of grain in newly converted farmland is expressed in tons per ha (t / ha). C C The price is for agricultural products, expressed in yuan / ton.

[0033] In some embodiments, the economic benefits of wetland reclamation ​ It has the conventional technical meaning known to those skilled in the art. For example, it can be consistent with the meaning of the term "economic benefits of reclamation" recorded in the article "Discussion on the Best Economic Benefits of the Pearl River Delta Reclamation Project". It can be calculated by formula (4) of the present invention.

[0034] Net income and expenditure of land reclamation ​ It has the conventional technical meaning known to those skilled in the art. For example, it can be consistent with the meaning of the term "carbon budget of reclaimed wetlands" recorded in the article "The Influence of Temperature and Water Level on Carbon Processes in Coastal Reclaimed Wetlands - A Case Study of Chongming Dongtan". It can be calculated by the calculation method of "change in greenhouse gas emissions during reclamation" recorded in the article CN118643246A "A Calculation Method and System for Net Greenhouse Gas Budget NGB of Wetlands".

[0035] Total cost of land reclamation ​ It has the conventional technical meaning known to those skilled in the art. For example, it can be the meaning of the term "total cost" recorded in the article "The Impact of Jiangsu Coastal Reclamation on the Non-use Value of Radial Sand Ridge Groups", which can be calculated by formula (5).

[0036] reclamation costs ​ It has a conventional technical meaning known to those skilled in the art. For example, it could mean the "reclamation cost" recorded in the article "Strengthening the Coordination of Farmland Occupation and Compensation to Ensure the Construction of Key Projects in Our Province - A Research Report on the Provincial Unified Farmland Occupation and Compensation Balance Work of Tidal Flat Reclamation", which can be obtained by querying the data recorded in the article "Compilation of National Agricultural Product Cost and Benefit Data".

[0037] Newly converted farmland management costs ​ It has a conventional technical meaning known to those skilled in the art. For example, it can be consistent with the meaning of the term "cost of newly added cultivated land" recorded in the article "Research on the Calculation of Standards for Cultivated Land Reclamation Fees in Heilongjiang Province", and can be obtained by querying the data recorded in the article "Compilation of National Agricultural Product Cost and Benefit Data".

[0038] Grain yield in newly converted farmland ​ It has a conventional technical meaning known to those skilled in the art. For example, it can be consistent with the meaning of the term "grain output in reclamation areas" recorded in the article "Research on the Impact of Coastal Tidal Flat Reclamation on Grain Production Capacity in Jiangsu", and can be obtained by querying the data recorded in the article "Compilation of National Agricultural Product Cost and Benefit Data".

[0039] Newly converted farmland refers to farmland that has been reclaimed from wetlands.

[0040] In a specific embodiment, the economically feasible carbon sequestration and emission reduction measure that satisfies Formula I is to convert farmland back to wetlands; The economically feasible carbon sequestration and emission reduction measure that satisfies Formula II is land reclamation.

[0041] Group 2 embodiments, computer-readable storage medium of the present invention This group of embodiments provides a computer-readable storage medium. All embodiments in this group share the following common feature: when the computer program is executed by a processor, it implements a method for assessing the economic feasibility of a carbon sequestration and emission reduction measure as described in any of the embodiments in Group 1.

[0042] Group 3 Examples: Economic Feasibility Assessment System for the Carbon Sequestration and Emission Reduction Measures of the Present Invention This set of embodiments provides an economic feasibility assessment system for carbon sequestration and emission reduction measures. All embodiments in this set share the following common feature: the economic feasibility assessment system for carbon sequestration and emission reduction measures includes a computing unit; the computing unit includes a computer-readable storage medium as described in any of the embodiments in the second set.

[0043] In some embodiments, a computing unit is provided on the data mainline; the computing unit includes the computer-readable storage medium of claim 5.

[0044] In a further embodiment, a database and a data query unit are also provided on the data main line, which are located upstream of the computing unit and connected in sequence; the data query unit queries data from the database and outputs it to the computing unit.

[0045] In a specific embodiment, the database includes: carbon credit prices. P C Database, Costs of converting farmland back to wetlands ​ Database, reduction in farmland management costs ​ Database, yield reduction per unit area of ​​farmland ​ Database, crop prices C C Database, reclamation costs ​ Database, management costs of newly converted farmland ​ Database, Grain Yield of Newly Converted Farmland ​ database.

[0046] In a more specific embodiment, carbon credit pricing P CThe database stores or links to data disclosed on the "State and Trends of Carbon Pricing 2025" website; The cost of converting farmland back to wetlands ​ Database, reduction in farmland management costs ​ Database, yield reduction per unit area of ​​farmland ​ Database, crop prices C C Database, reclamation costs ​ Database, management costs of newly converted farmland ​ Database, Grain Yield of Newly Converted Farmland ​ The database stores data recorded in the "Compilation of Cost and Benefit Data of Agricultural Products Nationwide".

[0047] A more specific embodiment of the present invention provides the application and effect verification of the evaluation method. This embodiment provides an economic feasibility evaluation method for carbon sequestration and emission reduction measures. Unlike existing net carbon balance methods that only focus on the ecosystem itself, the present invention studies the economic feasibility of net balance, which can measure whether emission reduction measures can be practically applied in practice. The present invention combines the net balance per unit area of ​​farmland conversion to wetlands and wetland reclamation to clarify the net balance for 1 hectare of conversion. Taking into account economic (cost, yield, and net emission reduction gains and losses) limiting factors, an economic feasibility evaluation method for carbon sequestration and emission reduction measures is established. ​ This study explores the economic feasibility of converting farmland back to wetlands and wetland reclamation as carbon sequestration and emission reduction measures, and clarifies the ecosystem transformation management strategy for carbon sequestration and emission reduction.

[0048] Economic feasibility analysis of converting farmland back to wetlands for carbon sequestration and emission reduction: Taking into account the net income and expenditure per unit area of ​​returning farmland to wetlands, the economic benefits are significant. ​ Cost-effectiveness of converting farmland back to wetlands ​ Economic losses due to reduced farmland yield ​ The sign of the number determines the feasibility.

[0049] Net income and expenditure economic benefits of returning farmland to wetlands ​ (yuan / ha): (1) In the formula, ​ Carbon sequestration amount (t / ha) for returning farmland to wetland. P C Carbon credit price (yuan / ton) -1 ).

[0050] Cost-effectiveness of converting farmland back to wetlands ​ (yuan / ha): (2); In the formula, ​Cost of converting farmland back to wetlands (yuan / ha) ​ The amount of reduction in farmland management costs (yuan / ha).

[0051] Grain production losses ​ (yuan / ha): (3) In the formula, ​ Reduced yield per unit area of ​​farmland (t / ha). C C Price of agricultural products (yuan / t).

[0052] when ​ - ​ - ​ When the carbon sequestration rate is greater than 0, converting farmland back to wetlands is economically feasible as a carbon sequestration and emission reduction measure. Otherwise, it is not feasible.

[0053] Economic feasibility analysis of land reclamation for carbon sequestration and emission reduction: Taking into account the economic benefits of wetland reclamation ​ and economic costs ​ Economic benefits from increased production in newly converted farmland ​ The sign of the number determines the feasibility.

[0054] Economic benefits of wetland reclamation ​ (yuan / ha): (4) In the formula, ​ Net income and expenditure from land reclamation (t / ha). P C Same as formula (1).

[0055] Total cost of land reclamation ​ (yuan / ha): (5) In the formula, ​ Cost of land reclamation (yuan / ha). ​ The cost of managing newly converted farmland (yuan / ha).

[0056] Increased economic benefits from newly converted farmland ​ (yuan / ha): (6) In the formula, ​ Grain yield (t / ha) of newly converted farmland. C C Same as formula (3).

[0057] when ​ - ​ + ​When the carbon sequestration rate is greater than 0, land reclamation is economically feasible as a carbon sequestration and emission reduction measure. Otherwise, it is not feasible.

[0058] Experimental Example 1: Verification of the accuracy of the evaluation method of this invention in Hengshui Lake Wetland Hengshui Lake Wetland was chosen as the verification target. The wetland had previously adopted carbon sequestration and emission reduction measures such as returning farmland to wetlands, which have been proven to be feasible in practice (the process and results are recorded in the articles "Exploring New Directions for Environmental and Ecological Engineering of Hengshui Lake from the Perspective of Sustainable Development" and "The Return of a Lake Wetland - Hengshui Lake Enters the 2.0 Era").

[0059] The economic feasibility assessment of carbon sequestration and emission reduction measures for Hengshui Lake wetland using the evaluation method of this invention is as follows: 1. Using the method or data described in the article "A Method and System for Calculating Net Greenhouse Gas Budget (NGB) of Wetlands," the PNGCW of Hengshui Lake is obtained as 1.65 × 10⁻⁶. 2 t / ha, carbon credit prices are obtained through data from the "State and Trends of Carbon Pricing 2025" website. P C =30 yuan / t, respectively, substitute them into formula (1) to calculate the result. ​ 4.95×10 3 Yuan / ha.

[0060] 2. The cost of converting farmland back to wetlands was calculated using data recorded in the "Compilation of National Agricultural Product Cost and Benefit Data". ​ =2.80×10 3 Yuan / ha, the reduction in farmland management costs ​ =9.95×10 3 Yuan / ha, respectively, are substituted into formula (2) to calculate the results. ​ 7.15×10 3 Yuan / ha.

[0061] 3. The yield reduction per unit area of ​​farmland was calculated using data recorded in the "Compilation of National Agricultural Product Cost and Benefit Data". ​ =7.51 t / ha, crop price C C =1555.84 yuan / t, substituting it into formula (3) to calculate the grain yield reduction loss. ​ It is 1.17 × 10 4 Yuan / ha.

[0062] 4. Combining points 1-3 above, REW-CTW-DPC = 4.12 × 10⁻⁶ 2 Yuan / ha, which is equivalent to a net benefit of 4.12 × 10⁻⁶ yuan / ha for the conversion of farmland back to wetlands in Hengshui Lake. 2Yuan / ha is greater than 0, satisfying equation I, therefore the measure of returning farmland to wetlands in Hengshui Lake is economically feasible.

[0063] 5. The net greenhouse gas budget (NGB) of Hengshui Lake was obtained using the methods or data described in the article "A Method and System for Calculating Net Greenhouse Gas Budget (NGB) of Wetlands". ​ =-3.26×10 3 t / ha, carbon credit prices are obtained through data from the "State and Trends of Carbon Pricing 2025" website. P C =30 yuan / t, respectively, substitute them into formula (4) to calculate. ​ -9.76×10 4 Yuan / ha.

[0064] 6. The reclamation cost was calculated using data recorded in the "Compilation of National Agricultural Product Cost and Benefit Data". ​ =2.10×10 3 Yuan / ha, management cost of newly converted farmland ​ =9.95×10 3 Yuan / ha, respectively, are substituted into formula (5) to calculate the results. ​ 1.21×10 4 Yuan / ha.

[0065] 7. The grain yield of newly converted farmland was calculated using data recorded in the "Compilation of National Agricultural Product Cost and Benefit Data". ​ =7.51 t / ha, crop price C C =1555.84 yuan / t, substituting these values ​​into formula (6) yields the economic benefit of increased production from newly converted farmland. ​ It is 1.17 × 10 4 Yuan / ha 8. Combining points 5-7 above, REC - CTC + IPC = -9.80 × 10 4 Yuan / ha is less than 0, which does not satisfy Equation II, meaning the net loss from land reclamation is 9.80 × 10⁻⁶. 4 The cost per hectare (yuan / ha) makes reclamation of Hengshui Lake economically unfeasible.

[0066] The assessment results obtained using the assessment method of this invention are consistent with the results recorded in the literature and website "Exploring New Directions for Environmental and Ecological Engineering of Hengshui Lake from the Perspective of Sustainable Development" and "The Return of a Lake Wetland - Hengshui Lake Enters the 2.0 Era".

[0067] Experimental Example 2: Verification of the accuracy of the evaluation method of the present invention in the Sanjiang Plain wetland. The Sanjiang Plain wetland was chosen as the verification target. This wetland had previously adopted carbon sequestration and emission reduction measures such as returning farmland to wetland, and practice has proven that it is feasible (the process and results are recorded in the article "Effect Evaluation and Subjective Game Theory Study of Returning Farmland to Wetland in Heilongjiang - Taking the Sanjiang Plain Wetland as an Example").

[0068] The economic feasibility assessment of carbon sequestration and emission reduction measures for the Sanjiang Plain wetlands using the evaluation method of this invention is carried out in the following steps: 1. Using the method or data described in the article "A Method and System for Calculating Net Greenhouse Gas Budget (NGB) of Wetlands," the PNGCW of the Sanjiang Plain is obtained as 5.39 × 10⁻⁶. 3 t / ha, carbon credit prices are obtained through data from the "State and Trends of Carbon Pricing 2025" website. P C =30 yuan / t, respectively, substitute them into formula (1) to calculate the result. ​ 1.62×10 5 Yuan / ha.

[0069] 2. The cost of converting farmland back to wetlands was calculated using data recorded in the "Compilation of National Agricultural Product Cost and Benefit Data". ​ =2.80×10 3 Yuan / ha, the reduction in farmland management costs ​ =9.95×10 3 Yuan / ha, respectively, are substituted into formula (2) to calculate the results. ​ 7.15×10 3 Yuan / ha.

[0070] 3. The yield reduction per unit area of ​​farmland was calculated using data recorded in the "Compilation of National Agricultural Product Cost and Benefit Data". ​ =7.51 t / ha, crop price C C =1555.84 yuan / t, substituting it into formula (3) to calculate the grain yield reduction loss. ​ It is 1.17 × 10 4 Yuan / ha.

[0071] 4. Combining 1-3 above, REW-CTW-DPC = 1.57 × 10 5 Yuan / ha, greater than 0, satisfies Equation I, that is, the net benefit of converting farmland back to wetlands in the Sanjiang Plain is 1.57 × 10 5 Yuan / ha, therefore the measure of returning farmland to wetlands in the Sanjiang Plain is economically feasible.

[0072] 5. Using the methods or data described in the article "A Method and System for Calculating Net Greenhouse Gas Budget (NGB) of Wetlands," the net greenhouse gas budget (NGB) of the Sanjiang Plain was obtained.​ =-1.29×10 2 t / ha, carbon credit prices are obtained through data from the "State and Trends of CarbonPricing 2025" website. P C =30 yuan / t, respectively, substitute them into formula (4) to calculate. ​ -3.88×10 3 Yuan / ha.

[0073] 6. The reclamation cost was calculated using data recorded in the "Compilation of National Agricultural Product Cost and Benefit Data". ​ =2.10×10 3 Yuan / ha, management cost of newly converted farmland ​ =9.95×10 3 Yuan / ha, respectively, are substituted into formula (5) to calculate the results. ​ 1.21×10 4 Yuan / ha.

[0074] 7. The grain yield of newly converted farmland was calculated using data recorded in the "Compilation of National Agricultural Product Cost and Benefit Data". ​ =7.51 t / ha, crop price C C =1555.84 yuan / t, substituting these values ​​into formula (6) yields the economic benefit of increased production from newly converted farmland. ​ It is 1.17 × 10 4 Yuan / ha.

[0075] 8. Combining points 5-7 above, REC - CTC + IPC = -4.25 × 10⁻⁶ 3 Yuan / ha, less than 0, does not satisfy Equation II, i.e., the net loss from reclamation in the Sanjiang Plain is 4.25 × 10⁻⁶. 3 The land reclamation measures in the Sanjiang Plain are not economically feasible due to the cost of RMB per ha.

[0076] The evaluation results obtained using the evaluation method of this invention are consistent with the results recorded in the literature "Effect Evaluation and Subjective Game Theory Study of Returning Farmland to Wetlands in Heilongjiang Province - A Case Study of Wetlands in the Sanjiang Plain".

[0077] Experimental Example 3: Verification of the accuracy of the evaluation method of the present invention in the Momoge Wetland The Momoge Wetland was chosen as the verification target. The wetland had previously adopted carbon sequestration and emission reduction measures such as returning farmland to wetlands, which have been proven to be feasible in practice (the process and results are recorded in "A Chronicle of Wetland Protection and Restoration Project in Jilin Province" and "Ecological Momoge Reappears with the Beautiful Scenery of Ten Thousand Birds Flying").

[0078] The economic feasibility assessment of carbon sequestration and emission reduction measures for the Momoge Wetland using the evaluation method of this invention is as follows: 1. Using the method or data described in the article "A Method and System for Calculating Net Greenhouse Gas Budget (NGB) of Wetlands," the PNGCW of Momoge is obtained as 1.21 × 10⁻⁶. 4 t / ha, carbon credit prices are obtained through data from the "State and Trends of Carbon Pricing 2025" website. P C =30 yuan / t, respectively, substitute them into formula (1) to calculate. ​ 3.63×10 5 Yuan / ha.

[0079] 2. The cost of converting farmland back to wetlands was calculated using data recorded in the "Compilation of National Agricultural Product Cost and Benefit Data". ​ =2.80×10 3 Yuan / ha, the reduction in farmland management costs ​ =9.95×10 3 Yuan / ha, respectively, are substituted into formula (2) to calculate the results. ​ 7.15×10 3 Yuan / ha.

[0080] 3. The yield reduction per unit area of ​​farmland was calculated using data recorded in the "Compilation of National Agricultural Product Cost and Benefit Data". ​ =7.51 t / ha, crop price C C =1555.84 yuan / t, substituting it into formula (3) to calculate the grain yield reduction loss. ​ It is 1.17 × 10 4 Yuan / ha.

[0081] 4. Combining points 1-3 above, REW-CTW-DPC = 3.58 × 10⁻⁶ 5 Yuan / ha, greater than 0, satisfies Equation I, that is, the net benefit of returning farmland to wetlands in Momoge is 3.58 × 10 5 Yuan / ha, therefore the Momoge farmland conversion to wetland is economically feasible.

[0082] 5. Obtain the net greenhouse gas budget (NGB) of Momoge using the methods or data described in the article "A Method and System for Calculating Net Greenhouse Gas Budget (NGB) of Wetlands". ​ =-7.56×10 2 t / ha, carbon credit prices are obtained through data from the "State and Trends of Carbon Pricing 2025" website. P C=30 yuan / t, respectively, substitute them into formula (4) to calculate. ​ -2.27×10 4 Yuan / ha.

[0083] 6. The reclamation cost was calculated using data recorded in the "Compilation of National Agricultural Product Cost and Benefit Data". ​ =2.10×10 3 Yuan / ha, management cost of newly converted farmland ​ =9.95×10 3 Yuan / ha, respectively, are substituted into formula (5) to calculate the results. ​ 1.21×10 4 Yuan / ha.

[0084] 7. The grain yield of newly converted farmland was calculated using data recorded in the "Compilation of National Agricultural Product Cost and Benefit Data". ​ =7.51 t / ha, crop price C C =1555.84 yuan / t, substituting these values ​​into formula (6) yields the economic benefit of increased production from newly converted farmland. ​ It is 1.17 × 10 4 Yuan / ha.

[0085] 8. Combining points 5-7 above, REC - CTC + IPC = -2.30 × 10 4 Yuan / ha is less than 0, which does not satisfy Equation II, meaning the net loss from the Momoge reclamation is 2.30 × 10⁻⁶. 4 The cost per hectare (yuan / ha) makes the Momoge reclamation project economically unfeasible.

[0086] The evaluation results obtained using the evaluation method of this invention are consistent with the results recorded on the websites "A Chronicle of Wetland Protection and Restoration Projects in Jilin Province" and "Ecological Momoge Restores the Beautiful Scenery of Ten Thousand Birds Flying".

[0087] The results of previous reports on the wetlands where the above three experimental examples are located are completely consistent with the results of the evaluation by this method. The evaluation method and system of the present invention are comparable, indicating that the feasibility of carbon sequestration and emission reduction measures needs to be considered from an economic perspective. Therefore, the evaluation method and system of the present invention for assessing the economic feasibility of carbon sequestration and emission reduction measures are reliable.

Claims

1. A method for assessing the economic feasibility of carbon sequestration and emission reduction measures, characterized in that, Proceed with the following steps: The carbon sequestration and emission reduction measures that satisfy either Formula I or Formula II are economically feasible; REW - CTW - DPC >0 Equation I REC - CTC + IPC >0 Formula II; In formula I, REW The net income and expenditure economic benefits of converting farmland back to wetlands are measured in yuan / ha. CTW The cost-effectiveness of converting farmland back to wetlands is measured in yuan / ha; DPC The loss due to reduced grain production is expressed in yuan / ha. In formula II, REC The economic benefits of wetland reclamation are expressed in yuan / ha. CTC The economic cost of land reclamation is expressed in yuan / ha. IPC The economic benefits of increased production from newly converted farmland are measured in yuan / ha.

2. The method for assessing the economic feasibility of a carbon sequestration and emission reduction measure according to claim 1, characterized in that, Net income and expenditure economic benefits of returning farmland to wetlands REW Calculate using the following formula (1): （1）； In equation (1), PNGCW The carbon sequestration amount of land converted from farmland to wetland is expressed in t / ha. P C The price is for carbon credits, expressed in yuan / ton. Cost-effectiveness of converting farmland back to wetlands CTW Calculate using the following formula (2): （2）； In equation (2), CW The cost of converting farmland back to wetlands is expressed in yuan per ha. CMD The amount of reduction in farmland management costs is expressed in yuan / ha. Grain production losses DPC Calculate using the following formula (3): （3） In equation (3), DP The reduction in yield per unit area of ​​farmland, expressed in t / ha; C C The price is for agricultural products, expressed in yuan / ton.

3. The method for assessing the economic feasibility of a carbon sequestration and emission reduction measure according to claim 1, characterized in that, Economic benefits of wetland reclamation REC Calculate using the following formula (4): （4） In equation (4), PNGWC The net income and expenditure of land reclamation is expressed in t / ha. P C The price is for carbon credits, expressed in yuan / ton. Total cost of land reclamation CTC Calculate using the following formula (5): （5） In equation (5), CC The cost of land reclamation is expressed in yuan / ha. CM The cost of managing newly converted farmland is expressed in yuan / ha. Increased economic benefits from newly converted farmland IPC Calculate using the following formula (6): （6） In equation (6), IP The yield of grain in newly converted farmland is expressed in tons per ha (t / ha). C C The price is for agricultural products, expressed in yuan / ton.

4. The method for assessing the economic feasibility of a carbon sequestration and emission reduction measure according to claim 1, characterized in that, The economically feasible carbon sequestration and emission reduction measure that satisfies Formula I is to convert farmland back to wetlands; The economically feasible carbon sequestration and emission reduction measure that satisfies Formula II is land reclamation.

5. A computer-readable storage medium, characterized in that, When the computer program is executed by the processor, it implements a method for assessing the economic feasibility of a carbon sequestration and emission reduction measure as described in any one of claims 1-4.

6. A system for evaluating the economic feasibility of carbon sequestration and emission reduction measures, characterized in that, include: Computational unit; The computing unit includes the computer-readable storage medium of claim 5.

7. The economic feasibility assessment system for carbon sequestration and emission reduction measures according to claim 6, characterized in that, The data mainline is equipped with a computing unit; the computing unit includes the computer-readable storage medium as described in claim 5.

8. The economic feasibility assessment system for carbon sequestration and emission reduction measures according to claim 7, characterized in that, The main data path also includes a database and a data query unit located upstream of the computing unit and connected in sequence; the data query unit retrieves data from the database and outputs it to the computing unit.

9. The economic feasibility assessment system for carbon sequestration and emission reduction measures according to claim 8, characterized in that, The database includes: carbon credit prices. P C Database, Costs of converting farmland back to wetlands CW Database, reduction in farmland management costs CMD Database, yield reduction per unit area of ​​farmland DP Database, crop prices C C Database, reclamation costs CC Database, management costs of newly converted farmland CM Database, Grain Yield of Newly Converted Farmland IP database.

10. The economic feasibility assessment system for carbon sequestration and emission reduction measures according to claim 9, characterized in that, Carbon credit price P C The database stores or links to data disclosed on the "State and Trends of Carbon Pricing 2025" website; The cost of converting farmland back to wetlands CW Database, reduction in farmland management costs CMD Database, yield reduction per unit area of ​​farmland DP Database, crop prices C C Database, reclamation costs CC Database, management costs of newly converted farmland CM Database, Grain Yield of Newly Converted Farmland IP The database stores data recorded in the "Compilation of Cost and Benefit Data of Agricultural Products Nationwide".

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