Water conservancy project carbon emission and carbon sequestration measure evaluation method

Abstract

The invention relates to a water conservancy project carbon emission and carbon sequestration measure evaluation method. The method comprises the following steps: S1, obtaining real-time engineering carbon emission and carbon sequestration factor data of a target area; s2, inputting the obtained real-time engineering carbon emission and carbon sequestration factor data into an engineering carbon emission and carbon sequestration measure evaluation model to obtain an evaluation result and carbon emission trend data; s3, formulating a carbon sequestration scheme according to the obtained evaluation result and carbon emission trend data; s4, performing a carbon sequestration test on the environment according to the formulated carbon sequestration scheme; and S5, further optimizing and adjusting the carbon sequestration scheme according to the tested stage effect until the carbon sequestration target is achieved. According to the method provided by the invention, efficient carbon sequestration of the plain depression can be realized, and the effect of the carbon sequestration measure can be evaluated.

Description

Technical Field

[0001] The present invention belongs to the technical field of carbon emission, and in particular relates to a method for evaluating carbon emission and carbon fixation measures of a water conservancy project. Background Art

[0002] Carbon emissions refer to greenhouse gases released during human activities, especially carbon dioxide, which lead to global warming.

[0003] Carbon sequestration measures refer to increasing carbon sinks through various means and reducing the concentration of carbon dioxide in the atmosphere. Carbon sequestration measures include afforestation, forest restoration, forest fire prevention, and pest and disease control to increase forest carbon sequestration and reduce carbon emissions.

[0004] Through the assessment of carbon emissions and carbon sequestration measures, the vegetation ecosystem where the water conservancy project is located can be better evaluated and protected. The assessment of carbon emissions and carbon sequestration measures has significant benefits and is of great significance for promoting the sustainable development of a low-carbon economy. However, the current assessment methods for carbon emissions and carbon sequestration measures are not scientific and systematic enough, and the final assessment data is distorted and does not meet actual needs. Summary of the invention

[0005] 1. Technical issues to be resolved In response to the existing technical problems, the present invention provides a method for evaluating carbon emissions and carbon fixation measures of water conservancy projects.

[0006] (II) Technical solution In order to achieve the above object, the main technical solutions adopted by the present invention include: A method for evaluating carbon emissions and carbon sequestration measures of water conservancy projects, comprising the following steps: S1. Obtain real-time engineering carbon emission and carbon sequestration factor data in the target area; S2. Input the obtained real-time engineering carbon emission and carbon sequestration factor data into the engineering carbon emission and carbon sequestration measures assessment model to obtain the evaluation results and carbon emission trend data; S3. Formulate a carbon sequestration plan based on the evaluation results and carbon emission trend data obtained; S4. Conduct carbon sequestration tests on the environment according to the established carbon sequestration plan; S5. Further optimize and adjust the carbon fixation plan based on the interim results of the test until the carbon fixation target is achieved.

[0007] Preferably, the real-time engineering carbon emission factor data at least includes: quality improvement and carbon sink increase data, soil conservation and carbon fixation data, and erosion and emission reduction data; The quality improvement and carbon sink increase data include: vegetation carbon sink increase data of forest and grass measures, soil carbon sink increase data of forest and grass measures, soil carbon sink increase data of engineering measures and soil carbon sink increase data of tillage measures; The soil conservation and carbon sequestration data include: soil conservation and carbon sequestration data of forest and grass measures, soil conservation and carbon sequestration data of slope engineering, soil conservation and carbon sequestration data of ditch engineering mud interception and carbon sequestration data of tillage measures; The erosion reduction and emission reduction data include: erosion reduction and emission reduction data of forestry and grassland measures, erosion reduction and emission reduction data of slope engineering, erosion reduction and emission reduction data of ditch engineering and erosion reduction and emission reduction data of tillage measures.

[0008] Preferably, the engineering carbon emission and carbon sequestration measures assessment model includes: a primary assessment unit, a secondary assessment unit, a tertiary assessment unit and a quaternary assessment unit; Wherein, the first-level assessment units are divided according to administrative regions or river basins; The secondary assessment units are divided according to the types of soil and water measures; The three-level evaluation units are divided according to the life cycle of the measures to exert their effects; The four-level evaluation units are divided according to different site conditions.

[0009] Preferably, the vegetation sink data of forest and grass measures are measured by the biomass method, as follows: FCS B = FCS Ba + FCS Bu In the formula, FCS B To increase the sink of vegetation for forest and grassland measures; FCS Ba To increase sinks above ground for vegetation, including trees and shrubs; FCS Bu It increases the underground sink of vegetation, including underground sink of trees and shrubs.

[0010] Preferably, the soil sequestration data of forest and grass measures are measured according to the following method: According to the change of soil organic carbon density and forest area, FCS S = SOCD f-t1,j × S f-t1,j - SOCD f-t0,i × S f-t0,i In the formula j =1,2,3…is the vegetation type in the assessment year t1; i=1,2,3…is the vegetation type in the base year t0; S f-t1,j and S f-t0,i are the measure areas in year t1 and t0, respectively; SOCD f-t1,j and SOCD f-t0,i are the soil organic carbon density in year t1 and year t0, respectively; in, SOCD f The following methods should be selected in order: 1) Use carbon pool survey and measurement results; 2) Calculated based on soil organic carbon content, soil bulk density and soil layer thickness.

[0011] Preferably, the soil conservation and carbon sequestration data of the slope engineering is measured by multiplying the soil conservation amount by the soil organic carbon content, as shown in the following formula: ECS F,t = SF t,k SOCC t,k / 1000 Where k=1,2,3…is the type of slope engineering measures; ECS F,t Provide soil conservation and carbon sequestration data for slope projects; SOCC t,k For the organic carbon content of the surface soil of the project, the survey and measurement results can be used; SF t,k To preserve the annual soil volume for slope projects.

[0012] Preferably, the carbon sequestration data of ditch engineering mud interception should be measured by multiplying the intercepted mud volume by the organic carbon content according to the following formula: In the formula, ECS F,c The data of carbon sequestration in mud caused by mud interception in channel measures; k=1,2,3…is the type of channel engineering measures; i=1,2,3…is the siltation layer; G i For the organic carbon content of the i-th layer of sediment, the survey and measurement results can be used; Q i is the amount of sediment deposited in the i-th layer.

[0013] Preferably, the soil conservation and carbon sequestration data of tillage measures should be measured as follows: TCS F = SF t,l × SOCC t,l / 1000 In the formula, TCS F Conserve soil carbon sequestration data for soil and water conservation farming practices; l Types of farming practices for soil and water conservation; SOCC t,l For soil organic carbon content, survey and measurement results can be used; SF t,l To preserve soil volume for certain soil and water conservation farming measures.

[0014] Preferably, the erosion and emission reduction data of forest and grass measures should be measured as follows: FCS E = SF f,j × SOCC f,j / 1000× P se,j In the formula, FCS E Provide erosion reduction data for forest and grassland measures; SF f,j To conserve soil for water and soil conservation forest and grass measures; SOCC f,j is the soil organic carbon content; j Vegetation types for soil and water conservation forest and grass measures; P se,j is the proportion of soil organic carbon oxidized during the loss of corresponding measures; The data of slope engineering erosion reduction and emission reduction should be measured according to the following formula: ECS E,t = SF t,k SOCC t,k / 1000× P se,k In the formula, ECSE,t Provide erosion reduction and emission reduction data for slope engineering; k =1,2,3…, is the type of slope engineering measures; SF t,k To conserve soil volume for slope engineering annually; SOCC t,k is the organic carbon content of the surface soil of the slope project; P se,k is the proportion of soil organic carbon oxidized during the loss of corresponding measures.

[0015] Preferably, the erosion and emission reduction data of trench engineering should be measured as follows: ECE E,c = × P se,k In the formula ECE E,c Provide erosion reduction and emission reduction data for channel engineering; k =1,2,3…are the types of channel engineering measures; i=1,2,3…are the siltation layers; G i is the organic carbon content of the i-th layer of sediment; Q i is the amount of sediment deposited in the i-th layer; P se,k is the proportion of soil organic carbon oxidized during the loss of corresponding measures; The data on erosion reduction and emission reduction by tillage measures should be measured as follows: TCE E = SF t,l × SOCC t,l / 1000× P se,l In the formula TCE E Erosion reduction data for tillage practices; l Types of farming practices for soil and water conservation; SOCC t,l is the soil organic carbon content; SF t,lconserve soil volume for soil and water conservation farming measures; P se,l is the proportion of soil organic carbon oxidized during the loss of corresponding measures.

[0016] (III) Beneficial effects The beneficial effects of the present invention are as follows: a method for evaluating carbon emissions and carbon fixation measures for water conservancy projects provided by the present invention has the following beneficial effects: By evaluating the carbon emissions and carbon sequestration measures of the project through this assessment method, we can better evaluate and protect the vegetation ecosystem. The assessment method of carbon emissions and carbon sequestration measures has a high reference value for the next step of carbon emissions and carbon sequestration projects, and is of great significance for promoting the sustainable development of a low-carbon economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of a process for evaluating carbon emissions and carbon sequestration measures for water conservancy projects provided by the present invention; Figure 2 A schematic diagram of the model hierarchical structure in a method for evaluating carbon emissions and carbon sequestration measures for water conservancy projects provided by the present invention. DETAILED DESCRIPTION

[0018] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0019] like Figure 1 As shown: This embodiment discloses a method for evaluating carbon emissions and carbon sequestration measures of water conservancy projects, including the following steps: S1. Obtain real-time engineering carbon emission and carbon sequestration factor data in the target area; S2. Input the obtained real-time engineering carbon emission and carbon sequestration factor data into the engineering carbon emission and carbon sequestration measures assessment model to obtain the evaluation results and carbon emission trend data; S3. Formulate a carbon sequestration plan based on the evaluation results and carbon emission trend data obtained; S4. Conduct carbon sequestration tests on the environment according to the established carbon sequestration plan; S5. Further optimize and adjust the carbon fixation plan based on the interim results of the test until the carbon fixation target is achieved.

[0020] It should be noted that the real-time engineering carbon emission factor data in this embodiment at least includes: quality improvement and carbon sink increase data, soil conservation and carbon fixation data, and erosion and emission reduction data.

[0021] Among them, the quality improvement and carbon sink increase data include: vegetation carbon sink increase data from forestry and grassland measures, soil carbon sink increase data from forestry and grassland measures, soil carbon sink increase data from engineering measures and soil carbon sink increase data from tillage measures.

[0022] In detail, forest and grassland measures to enhance vegetation carbon sinks include: afforestation, closed-off management and other measures, which absorb CO2 from the atmosphere through photosynthesis and fix it in the vegetation.

[0023] Forest and grassland measures to increase soil carbon sequestration include: afforestation, grass planting, closed-off management and other measures to increase the source of soil organic matter, improve soil structure, regulate soil carbon cycle, and increase the content of organic carbon in forest and grassland soil.

[0024] Engineering measures to increase soil carbon sequestration include: after the construction of slope and ditch projects such as terraces, fish scale pits, and silt dams, the microtopography of the slope and its water, air, and heat conditions are improved, which promotes the good growth and development of crops and other plants, increases the input of soil organic matter, forms a benign soil carbon cycle, and thus increases the soil organic carbon content.

[0025] The channel engineering follows the following principles: Principles of river channel plan layout: The management plan is mainly based on river dredging and silting. The center line of the river dredging is basically arranged according to the original center line of the river channel. According to the current situation of the river channel, efforts are made to connect the upstream and downstream in a straight line. The river channel center line is used to dig on both sides, and the excavated earth is used to build embankments or abandon soil.

[0026] Principles of river dredging design: River management is basically based on widening and deepening the existing river section. The center line of the river is determined according to the following principles: (1) The center line of the river is basically determined according to the center line of the existing river; (2) Ensure smooth discharge of the river, and make appropriate adjustments to individual bends based on the demolition situation; (3) Minimize the project land occupation and house demolition to reduce investment. (4) The river dredging is controlled by the drainage water level being 0.3~0.5m lower than the ground elevation on both sides. For local areas with low terrain and lower than the water level, the micro-topography form of abandoned soil is adopted.

[0027] Principles of planar layout of main ditches: The management is mainly based on river dredging and silting. The center line of river dredging is basically arranged according to the center line of the original river channel. According to the current status of the main (branch) ditch, efforts are made to connect the upstream and downstream smoothly. Excavation is carried out on both sides from the center line of the main (branch) ditch, and the excavated earth is used to build embankments or abandon soil.

[0028] Design principles for dredging of main (branch) ditches: The main (branch) ditch management is basically based on widening and deepening the existing main (branch) ditch cross-section, and the center line of the ditch is determined according to the following principles: (1) The center line of the main (branch) ditch is basically determined according to the center line of the existing main (branch) ditch; (2) Ensure that the main (branch) ditch discharges smoothly, and make appropriate adjustments to individual bends based on the demolition situation; (3) Minimize the project land occupation and house demolition to reduce investment. (4) The main ditch is dredged according to the control of the drainage water level being 0.3~0.5m lower than the ground elevation on both sides. For local areas with low terrain and lower than the water level, the micro-topography form of abandoned soil is adopted.

[0029] Tillage measures to increase soil carbon sinks include: contour tillage, contour ridge planting, straw mulching, stubble retention, straw return to the field, reduced tillage, no-tillage and other measures to improve the soil, increase the source of organic matter, increase the source of soil organic matter, and affect the decomposition of organic matter and soil respiration and other processes to regulate the soil carbon cycle, thereby increasing the content of organic carbon in farmland soil.

[0030] The soil conservation and carbon fixation data in this embodiment include: soil conservation and carbon fixation data of forest and grass measures, soil conservation and carbon fixation data of slope engineering, soil conservation and carbon fixation data of ditch engineering mud retention and carbon fixation data, and soil conservation and carbon fixation data of tillage measures.

[0031] Forest and grassland measures to conserve soil and fix carbon include: afforestation, grass planting, forest and grassland management and other measures, which increase ground roughness, reduce runoff and water flow velocity, reduce the dispersion effect of water flow on the soil and the sand-carrying capacity of water flow, and thus reduce soil organic carbon transfer.

[0032] Slope engineering for soil conservation and carbon fixation includes: after sloping farmland is converted into terraces, the slope of the field is greatly reduced and gentler or becomes flat, and the original slope length is cut off and shortened or completely eliminated, which greatly intercepts precipitation and reduces runoff, and is conducive to stabilizing the soil carbon pool.

[0033] Channel engineering to intercept sediment and fix carbon includes measures such as silt dams and gullies. By intercepting sediment, a large amount of soil organic carbon lost due to upstream erosion is fixed, forming deep soil carbon that is not easily mineralized to achieve carbon burial.

[0034] Tillage measures to conserve soil and fix carbon include: contour tillage, contour ridge planting, straw covering, stubble retention, straw return to the field, reduced tillage and no-tillage. These measures can effectively intercept surface runoff, or increase surface cover and reduce erosion, so as to retain the soil organic carbon of cultivated land to the greatest extent possible.

[0035] The erosion reduction and emission reduction data in this embodiment include: erosion reduction and emission reduction data of forestry and grassland measures, erosion reduction and emission reduction data of slope engineering, erosion reduction and emission reduction data of ditch engineering and erosion reduction and emission reduction data of tillage measures.

[0036] Forest and grassland measures to reduce erosion and emissions include: afforestation, grass planting, forest and grassland management and other measures to reduce surface soil erosion and prevent the mineralization of soil organic carbon from being emitted into the atmosphere in the form of CO2 or CH4 to form a carbon source.

[0037] Slope engineering erosion reduction and emission reduction include measures such as terraces and fish scale pits, which not only reduce soil loss, but also shorten the distance of soil loss migration, and prevent the mineralization of soil organic carbon from being emitted into the atmosphere in the form of CO2 or CH4 to form a carbon source.

[0038] Channel engineering for reducing erosion and emissions includes measures such as silt dams. The continuous accumulation of sediment raises the erosion base level, reduces the channel gradient, slows down the rate and distance of sediment migration, and reduces carbon emissions from soil organic carbon during erosion and migration.

[0039] Tillage measures to reduce erosion and emissions include: contour tillage, contour ridge planting, straw mulching, stubble retention, straw return to the field, reduced tillage, no-tillage and other measures, which reduce or avoid the mineralization of active organic carbon in eroded farmland soil or the degradation of soil organic matter during the migration and transportation of soil particles, thereby avoiding greenhouse gas emissions.

[0040] like Figure 2 As shown: the engineering carbon emission and carbon sequestration measures assessment model in this embodiment includes: a primary assessment unit, a secondary assessment unit, a tertiary assessment unit and a quaternary assessment unit.

[0041] Among them, the first-level assessment unit is divided according to administrative regions or river basins; the second-level assessment unit is divided according to the types of soil and water measures; the third-level assessment unit is divided according to the life cycle of the measures to take effect; and the fourth-level assessment unit is divided according to different site conditions.

[0042] The practical application includes the following steps: 1. Divide a heterogeneous assessment object into N first-level assessment units according to the river basin (or administrative) divisions. Provincial administrative regions can be divided into multiple county-level administrative regions, and large and medium-sized river basins can be divided into multiple small river basins.

[0043] 2. Each first-level assessment area is divided into M second-level assessment units according to the type of measures (different types of forestry, grassland, engineering and farming measures).

[0044] 3. Each secondary assessment unit is divided into several tertiary assessment units according to the life cycle of the measures. For example, soil and water conservation forestry and grassland measures are divided according to age groups, slope protection projects such as terraces are divided according to the years of construction, and channel sand-trapping measures such as silt dams are divided according to the years of siltation.

[0045] 4. According to actual conditions, each third-level assessment unit is combined with comparative observations of different site conditions (including five major environmental factors such as topography, soil, hydrology, biology and human activities) to finally determine multiple relatively independent and homogenized map assessment units (plots).

[0046] It should be noted that the vegetation sequestration data of forest and grass measures in this embodiment is measured by the biomass method, as follows: FCS B = FCS Ba + FCS Bu In the formula, FCS B To increase the sink of vegetation for forest and grassland measures; FCS Ba To increase sinks above ground for vegetation, including trees and shrubs; FCS Bu It increases the underground sink of vegetation, including underground sink of trees and shrubs.

[0047] It should be noted that the soil carbon sequestration data of forestry and grassland measures in this embodiment is measured according to the following method: based on the change in soil organic carbon density and the forest stand area.

[0048] FCS S = SOCD f-t1,j × S f-t1,j - SOCD f-t0,i × S f-t0,i In the formula j =1,2,3…is the vegetation type in the assessment year t1; i =1,2,3…is the vegetation type in the base year t0; S f-t1,j and S f-t0,i are the measure areas in year t1 and t0, respectively; SOCD f-t1,j and SOCD f-t0,i are the soil organic carbon densities in year t1 and year t0, respectively. SOCD f The following methods should be selected in order: 1) using carbon pool survey and measurement results; 2) calculating based on soil organic carbon content, soil bulk density and soil layer thickness.

[0049] It should be noted that: in this embodiment, the soil conservation and carbon fixation data of the slope project is measured by multiplying the soil conservation amount by the soil organic carbon content, as shown in the following formula: ECS F,t = SF t,k SOCC t,k / 1000 Where k=1,2,3…is the type of slope engineering measures; ECS F,t Provide soil conservation and carbon sequestration data for slope projects; SOCC t,k For the organic carbon content of the surface soil of the project, the survey and measurement results can be used; SF t,k To preserve the annual soil volume for slope projects.

[0050] It should be noted that the carbon sequestration data of the channel engineering in this embodiment should be measured by multiplying the intercepted mud volume by the organic carbon content according to the following formula: In the formula, ECS F,c is the carbon sequestration data caused by the ditch measures; k=1,2,3…is the type of ditch engineering measures; i=1,2,3…is the siltation layer; G i For the organic carbon content of the i-th layer of sediment, the survey and measurement results can be used; Q i is the amount of sediment deposited in the i-th layer.

[0051] It should be noted that the soil conservation and carbon sequestration data of the tillage measures in this embodiment should be measured according to the following formula: TCS F = SF t,l × SOCC t,l / 1000 In the formula, TCS F Conserve soil carbon sequestration data for soil and water conservation farming practices; l Types of farming practices for soil and water conservation; SOCC t,l For soil organic carbon content, survey and measurement results can be used; SF t,l To preserve soil volume for certain soil and water conservation farming measures.

[0052] It should be noted that the erosion and emission reduction data of forest and grass measures in this embodiment should be measured according to the following formula: FCS E = SF f,j × SOCC f,j / 1000× P se,j In the formula, FCS E Provide erosion reduction data for forest and grassland measures; SF f,j To conserve soil for water and soil conservation forest and grass measures; SOCC f,j is the soil organic carbon content; j Vegetation types for soil and water conservation forest and grass measures; P se,jThe proportion of soil organic carbon oxidized during the loss process of corresponding measures; the slope erosion reduction and emission reduction data should be measured according to the following formula: ECS E,t = SF t,k SOCC t,k / 1000× P se,k In the formula, ECS E,t Provide erosion reduction and emission reduction data for slope engineering; k =1,2,3…, is the type of slope engineering measures; SF t,k To conserve soil volume for slope engineering annually; SOCC t,k is the organic carbon content of the surface soil of the slope project; P se,k is the proportion of soil organic carbon oxidized during the loss of corresponding measures.

[0053] It should be noted that the erosion reduction and emission reduction data of the trench engineering in this embodiment should be measured according to the following formula: ECE E,c = × P se,k In the formula ECE E,c Provide erosion reduction and emission reduction data for channel engineering; k =1,2,3…are the types of channel engineering measures; i=1,2,3…are the siltation layers; G i is the organic carbon content of the i-th layer of sediment; Q i is the amount of sediment deposited in the i-th layer; P se,k is the proportion of soil organic carbon oxidized during the loss of corresponding measures.

[0054] The data on erosion reduction and emission reduction by tillage measures should be measured as follows: TCE E = SF t,l × SOCC t,l / 1000× P se,l In the formula TCE E Erosion reduction data for tillage practices;l Types of farming practices for soil and water conservation; SOCC t,l is the soil organic carbon content; SF t,l conserve soil volume for soil and water conservation farming measures; P se,l is the proportion of soil organic carbon oxidized during the loss of corresponding measures.

[0055] By evaluating the carbon emissions and carbon fixation measures of the project through the evaluation method in this embodiment, the vegetation ecosystem can be better evaluated and protected. The evaluation method of carbon emissions and carbon fixation measures has a high reference value for the next step of carbon emissions and carbon fixation projects, and is of great significance for promoting the sustainable development of a low-carbon economy.

[0056] The technical principles of the present invention are described in conjunction with specific embodiments. These descriptions are only for explaining the principles of the present invention and cannot be interpreted in any way as limiting the scope of protection of the present invention. Based on the explanations here, those skilled in the art can associate other specific implementations of the present invention without creative work, and these methods will fall within the scope of protection of the present invention.

Claims

1. A method for evaluating carbon emissions and carbon sequestration measures of water conservancy projects, characterized in that: The steps include: S1. Obtain real-time engineering carbon emission and carbon sequestration factor data in the target area; S2. Input the obtained real-time engineering carbon emission and carbon sequestration factor data into the engineering carbon emission and carbon sequestration measures assessment model to obtain the evaluation results and carbon emission trend data; S3. Formulate a carbon sequestration plan based on the evaluation results and carbon emission trend data obtained; S4. Conduct carbon sequestration tests on the environment according to the established carbon sequestration plan; S5. Further optimize and adjust the carbon fixation plan based on the interim results of the test until the carbon fixation target is achieved.

2. The method according to claim 1, characterized in that: The real-time engineering carbon emission factor data at least include: quality improvement and carbon sink increase data, soil conservation and carbon fixation data, and erosion and emission reduction data; The quality improvement and carbon sink increase data include: vegetation carbon sink increase data of forest and grass measures, soil carbon sink increase data of forest and grass measures, soil carbon sink increase data of engineering measures and soil carbon sink increase data of tillage measures; The soil conservation and carbon sequestration data include: soil conservation and carbon sequestration data of forest and grass measures, soil conservation and carbon sequestration data of slope engineering, soil conservation and carbon sequestration data of ditch engineering mud interception and carbon sequestration data of tillage measures; The erosion reduction and emission reduction data include: erosion reduction and emission reduction data of forestry and grassland measures, erosion reduction and emission reduction data of slope engineering, erosion reduction and emission reduction data of ditch engineering and erosion reduction and emission reduction data of tillage measures.

3. The method according to claim 1, characterized in that The engineering carbon emission and carbon sequestration measures assessment model includes: a primary assessment unit, a secondary assessment unit, a tertiary assessment unit and a quaternary assessment unit; Wherein, the first-level assessment units are divided according to administrative regions or river basins; The secondary assessment units are divided according to the types of soil and water measures; The three-level evaluation units are divided according to the life cycle of the measures to exert their effects; The four-level evaluation units are divided according to different site conditions.

4. The method according to claim 2, It is characterized in that Among them, the vegetation sink data of forest and grass measures are measured by biomass method, as follows: FCS B = FCS Ba + FCS Bu In the formula, FCS B To increase the sink of vegetation for forest and grassland measures; FCS Ba To increase sinks above ground for vegetation, including trees and shrubs; FCS Bu It increases the underground sink of vegetation, including underground sink of trees and shrubs.

5. The method according to claim 2, characterized in that: in, The soil sequestration data of forest and grassland measures are measured according to the following method: According to the change of soil organic carbon density and forest area, FCS S = SOCD f-t1,j × S f-t1,j - SOCD f-t0,i × S f-t0,i In the formula j =1,2,3…is the vegetation type in the assessment year t1; i =1,2,3…is the vegetation type in the base year t0; S f-t1,j and S f-t0,i are the measure areas in year t1 and t0, respectively; SOCD f-t1,j and SOCD f-t0,i are the soil organic carbon density in year t1 and year t0, respectively; in, SOCD f The following methods should be selected in order: 1) Use carbon pool survey and measurement results; 2) Calculated based on soil organic carbon content, soil bulk density and soil layer thickness.

6. The method according to claim 2, characterized in that in, The soil conservation and carbon sequestration data of slope engineering is calculated by multiplying the soil conservation amount by the soil organic carbon content, as follows: ECS F,t = SF t,k SOCC t,k / 1000 In the formula k =1,2,3…are the types of slope engineering measures; ECS F,t Provide soil conservation and carbon sequestration data for slope projects; SOCC t,k The organic carbon content of the surface soil of the project; SF t,k To preserve the annual soil volume for slope projects.

7. The method according to claim 2, characterized in that: The carbon sequestration data of ditch engineering mud interception should be measured by multiplying the intercepted mud volume by the organic carbon content according to the following formula: ； In the formula, ECS F,c The data of carbon sequestration in mud caused by mud interception in channel measures; k=1,2,3…is the type of channel engineering measures; i=1,2,3…is the siltation layer; G i is the organic carbon content of the i-th layer of sediment; Q i is the amount of sediment deposited in the i-th layer.

8. The method according to claim 2, characterized in that: The soil conservation and carbon sequestration data of tillage measures should be measured according to the following formula: TCS F = SF t,l × SOCC t,l / 1000 In the formula, TCS F Conserve soil carbon sequestration data for soil and water conservation farming practices; l Types of farming practices for soil and water conservation; SOCC t,l is the soil organic carbon content; SF t,l To preserve soil volume for certain soil and water conservation farming measures.

9. The method according to claim 2, characterized in that: The data on erosion reduction and emission reduction of forest and grass measures should be measured according to the following formula: FCS E = SF f,j × SOCC f,j / 1000× P se,j In the formula, FCS E Provide erosion reduction data for forest and grassland measures; SF f,j To conserve soil for water and soil conservation forest and grass measures; SOCC f,j is the soil organic carbon content; j Vegetation types for soil and water conservation forest and grass measures; P se,j is the proportion of soil organic carbon oxidized during the loss of corresponding measures; The data of slope engineering erosion reduction and emission reduction should be measured according to the following formula: ECS E,t = SF t,k SOCC t,k / 1000× P se,k In the formula, ECS E,t Provide erosion reduction and emission reduction data for slope engineering; k =1,2,3…, is the type of slope engineering measures; SF t,k To conserve soil volume for slope engineering annually; SOCC t,k is the organic carbon content of the surface soil of the slope project; P se,k is the proportion of soil organic carbon oxidized during the loss of corresponding measures.

10. The method according to claim 2, characterized in that The erosion reduction and emission reduction data of trench engineering should be measured according to the following formula: ECE E,c = × P se,k In the formula ECE E,c Provide erosion reduction and emission reduction data for channel engineering; k =1,2,3…are the types of channel engineering measures; i=1,2,3…are the siltation layers; G i is the organic carbon content of the i-th layer of sediment; Q i is the amount of sediment deposited in the i-th layer; P se,k is the proportion of soil organic carbon oxidized during the loss of corresponding measures; The data on erosion reduction and emission reduction by tillage measures should be measured as follows: TCE E = SF t,l × SOCC t,l / 1000× P se,l In the formula TCE E Erosion reduction data for tillage practices; l Types of farming practices for soil and water conservation; SOCC t,l is the soil organic carbon content; SF t,l conserve soil volume for soil and water conservation farming measures; P se,l is the proportion of soil organic carbon oxidized during the loss of corresponding measures.

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