Method and device for calculating total carbon sequestration amount of greening area in expressway and medium

Abstract

The invention relates to the technical field of biological carbon sequestration, in particular to a method and device for calculating the total carbon sequestration amount of a greening area on an expressway and a medium. Identifying and calculating a leaf area index of vegetation (such as arbor and shrub species) on a unit scale for determining the coverage area of the plant; calculating the annual average carbon sequestration amount of different types of vegetation based on the daily net carbon sequestration amount per unit leaf area of different vegetation; on the basis of analyzing and evaluating the carbon sequestration capability of different types of plants, the carbon sequestration capability difference of common greening vegetation types of the expressway is obtained, and reference is provided for optimizing and selecting the vegetation types of the expressway by comprehensively considering the carbon sequestration level, the natural landscape and the maintenance cost.

Description

Technical Field

[0001] The present invention relates to the technical field of biological carbon fixation, and in particular to a method, equipment and medium for calculating the total amount of carbon fixation in a greening area of ​​a highway. Background Art

[0002] At present, in the process of highway construction, the role of plant greening as a carbon emission absorber cannot be ignored. In order to absorb the carbon emitted by the highway, plants for carbon fixation need to be planted on both sides of the highway. However, there are still many problems in the planning of highway plant green belts. For example, the carbon emissions of the highway are not taken into consideration, the carbon fixation effect cannot meet the carbon emission needs, and the aesthetics are emphasized over the ecology. It also ignores the changes in carbon absorption capacity during the plant growth cycle, and only selects the currently suitable plant species and planting quantities based on human experience, which cannot meet the long-term ecological and environmental protection needs of the highway. Summary of the invention

[0003] In view of the above technical problems, the technical solution adopted by the present invention is:

[0004] A method for calculating the total amount of carbon sequestration in a green area of ​​a highway, the method comprising the following steps:

[0005] S100, obtaining a plant biomass list W corresponding to a given plant species list A = {W1, W2, ..., W i ,……,

[0006] W m}, where A={A1,A2,……,A i , ..., A m},W i = {W i1 , W i2 , ..., W ij , ..., W in}, A i For the i

[0007] Plants, W ij is the plant biomass of the i-th type of plants in the j-th year among the corresponding selected n years, i = 1, 2, ..., m, m is the given number of plant species, j = 1, 2, ..., n, n is the pre-given number of years.

[0008] S200, according to W ij , get A i The corresponding plant carbon fixation amount E in year j ij , and based on E ij and the total carbon emission of the target road section C obtained in advance, and A i The initial planting quantity corresponding to the jth year.

[0009] Among them, L ij Meet the following conditions:

[0010] Among them, L ij A i The initial planting quantity corresponding to the jth year is: is the ceiling function.

[0011] S300, according to A i The initial planting quantity corresponding to each year in n years is obtained i The corresponding target discrete value of the number of plantings and A i The vegetation coverage FVC corresponding to the jth year ij .

[0012] S400, according to A i The vegetation coverage corresponding to each year in n years is obtained i The corresponding vegetation cover change rate.

[0013] S500, according to A i The corresponding target discrete value of the number of plantings and A i The corresponding vegetation cover change rate is used to determine the target plant species from the m types of plants.

[0014] S600, based on the initial planting quantity of the target plant species corresponding to each year in n years, determine the target planting quantity corresponding to the target plant species, so that the total amount of plant carbon fixation corresponding to the target plant species in each year can be obtained based on the target planting quantity corresponding to the target plant species.

[0015] Compared with the prior art, the present invention has obvious beneficial effects. By means of the above technical scheme, the method for calculating the total amount of carbon sequestration in the greening area of ​​a highway provided by the present invention can achieve considerable technical advancement and practicality, and has wide industrial utilization value, and has at least the following beneficial effects:

[0016] The present invention provides a method for calculating the total amount of carbon sequestration in a greening area of ​​an expressway. First, the plant biomass and plant carbon sequestration corresponding to each given type of plant in each year are obtained, and the initial planting quantity required for each type of plant in each year is obtained according to the plant carbon sequestration and the total carbon emission of the target road section, and then the target discrete degree value of the planting quantity corresponding to each type of plant and the vegetation coverage change rate are obtained, and the target plant species are determined according to the target discrete degree value of the planting quantity and the vegetation coverage change rate. In this way, plants with relatively small annual planting quantity changes and relatively small vegetation coverage changes are screened out, so that after being planted according to their corresponding target planting quantities, not only can the planting quantity required in the later growth period be met, but also a higher carbon sequestration amount can be achieved in the early planting period, thereby meeting the tree planting needs of the expressway. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A flow chart of a method for calculating the total amount of carbon sequestration in a greening area of ​​a highway provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0019] 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 those skilled in the art without creative work are within the scope of protection of the present invention.

[0020] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product, or server that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products, or devices.

[0021] The present invention provides a method for calculating the total amount of carbon sequestration in green areas of highways, such as Figure 1 As shown, the method comprises the following steps:

[0022] S100, obtaining a plant biomass list W corresponding to a given plant species list A = {W1, W2, ..., W i ,……,

[0023] W m}, where A={A1,A2,……,A i , ..., A m},W i = {W i1 , W i2 , ..., W ij , ..., W in}, A i For the i

[0024] Plants, W ij is the plant biomass of the i-th type of plants in the j-th year among the corresponding selected n years, i = 1, 2, ..., m, m is the given number of plant species, j = 1, 2, ..., n, n is the pre-given number of years.

[0025] Specifically, the given several plant species include but are not limited to poplar, arborvitae, Chinese pine, birch, and maple.

[0026] Specifically, the selected n years refer to selecting n consecutive years from the corresponding growing years for different types of plants; this can be understood as: taking the growing year most suitable for transplanting and planting as the first year.

[0027] In a specific embodiment, in step S100, W is obtained by the following steps: ij :

[0028] S101, get A i The plant diameter at breast height D corresponding to the jth year in n years ij and plant height H ij ; Among them, plant diameter at breast height D ij and plant height H ij Both with A i The tree age is positively correlated; it can be understood as: D is obtained through the corresponding table of the relationship between plant breast diameter and plant height and tree age. ij and plant height H ij ; Those skilled in the art know the corresponding relationship between the plant diameter at breast height and plant height of each plant and the tree age, and will not go into details here.

[0029] S102, according to A i The plant diameter at breast height D corresponding to the jth year in n yearsij and plant height H ij , respectively obtain A i The total aboveground biomass B corresponding to the jth year in n years ij and the total underground biomass F ij .

[0030] Specifically, the total aboveground biomass includes trunk biomass, bark biomass, branch biomass and leaf biomass.

[0031] An example is given below: For Pinus tabulaeformis, its trunk biomass U1 = 0.14187 × (D 2 H) 0.8728 , bark biomass defaults to 0, branch biomass U2=0.0147083(D 2 H) 0.9157 , leaf biomass U3=0.066901×(D 2 H) 0.8017 .

[0032] S103, according to A i The total aboveground biomass B corresponding to the jth year in n years ij and the total underground biomass F ij , get W ij .

[0033] Specifically, W ij Meet the following conditions:

[0034] W ij =B ij +F ij .

[0035] S200, according to W ij , get A i The corresponding plant carbon fixation amount E in year j ij , and based on E ij and the total carbon emission of the target road section C obtained in advance, and A i The initial planting quantity corresponding to the jth year.

[0036] Specifically, the total carbon emissions of the target section is the sum of the pre-acquired historical carbon emissions of the target section itself and the historical vehicle carbon emissions corresponding to the target section; it can be understood as: selecting the carbon emissions of the target section in the most recent year within the historical time period and the historical vehicle carbon emissions.

[0037] Concrete, E ij=NPP×1.63×0.27, where NPP is the net primary production, 1.63 is the coefficient of NPP converted into carbon dioxide, and 0.27 is the coefficient of carbon dioxide converted into carbon; the net primary production is obtained from the functional relationship of biomass, forest stand condition and tree age.

[0038] Specifically, L ij Meet the following conditions:

[0039] Among them, L ij A i The initial planting quantity corresponding to the jth year is: is the ceiling function.

[0040] As mentioned above, by obtaining plant biomass, plant carbon fixation, and combining with the total carbon emissions of the target section, the minimum number of plants required each year can be further obtained, which is conducive to grasping the number of trees required for each plant each year, while completing the absorption of carbon emitted in the target section, and reducing plant planting costs.

[0041] S300, according to A i The initial planting quantity corresponding to each year in n years is obtained i The corresponding target discrete value of the number of plantings and A i The vegetation coverage FVC corresponding to the jth year ij .

[0042] In a specific embodiment, in step S300, A is obtained by the following steps: i The corresponding target discrete value of the planting quantity is:

[0043] S301, according to A i The initial planting quantity corresponding to each year in n years is obtained i The initial discrete value S of the corresponding planting quantity 0 i .

[0044] Specifically, A i The initial discrete value S of the corresponding planting quantity 0 i Meet the following conditions:

[0045] S 0 i =(∑ n j＝1 (L ij -∑ n j＝1 L ij / n) 2 / n) 1 / 2 .

[0046] S302, normalize the initial discrete degree value of the planting quantity corresponding to each type of plant to obtain A i The corresponding target discrete value S of the planting quantity i .

[0047] Specifically, A i The corresponding target discrete value S of the planting quantity i Meet the following conditions:

[0048] S i =S 0 i / ∑ m i＝1 S 0 i .

[0049] As mentioned above, by obtaining the target discrete degree value of the planting quantity corresponding to each type of plant, the stability of the required quantity of each type of plant each year can be reflected. Due to the planting cost and environmental protection requirements, it is not possible to plant once a year. Therefore, when planting, plants with smaller changes in planting quantity should be selected to make the annual carbon fixation amount closer.

[0050] In a specific embodiment, in step S300, A is obtained by the following steps: i The vegetation coverage FVC corresponding to the jth year ij :

[0051] S310, according to the preset planting area of ​​the target road section and A i The initial planting quantity corresponding to the jth year is calculated as A i The corresponding average area occupied by each plant is α ij .

[0052] S320, obtaining remote sensing images of several i-th plants corresponding to the growth status of the j-th year in the area where the target road section belongs, and obtaining the first vertical projection area corresponding to each i-th plant based on the remote sensing images of the several i-th plants; it can be understood that: the growth conditions of several i-th plants in the area where the target road section belongs corresponding to the same growth year are the same.

[0053] Specifically, the first vertical projection area corresponding to the i-th type of plant is obtained by performing pixel recognition on the remote sensing image and extracting the corresponding plant features; those skilled in the art are aware of the specific implementation method for obtaining the actual area of ​​the corresponding plant through remote sensing images, which will not be repeated here.

[0054] S330, obtaining A according to the first vertical projection area corresponding to each i-th type plant i The second vertical projection area β of each plant in the jth yearij ; Among them, β ij It is the average vertical projection area obtained based on several first vertical projection areas.

[0055] S340, according to A i The corresponding average area occupied by each plant is α ij and A i The second vertical projection area β of each plant in the jth year ij , get A i The vegetation coverage FVC corresponding to the jth year ij .

[0056] Among them, A i The vegetation coverage FVC corresponding to the jth year ij Meet the following conditions:

[0057] FVC ij =β ij / α ij .

[0058] S400, according to A i The vegetation coverage corresponding to each year in n years is obtained i The corresponding vegetation cover change rate.

[0059] Specifically, A i The corresponding vegetation cover change rate meets the following conditions:

[0060] CV i =(∑ n j＝1 (FVC ij -∑ n j＝1 FVC ij / n) 2 / n) 1 / 2 / (∑ n j＝1 FVC ij / n),

[0061] Among them, CV i A i The corresponding vegetation cover change rate.

[0062] As mentioned above, by obtaining the vegetation coverage of each type of plants in each year and the corresponding vegetation coverage change rate of each type of plants, it is possible to reflect the growth status of each type of plants in each year and the vegetation coverage degree in the preset planting area. When the vegetation coverage change rate is large, it is believed that the extension area of ​​the plants changes greatly during the growth process. Therefore, in order to maintain the effective distance between the plants and the highway during planting, plants with a smaller vegetation coverage change rate should be selected to ensure carbon absorption without affecting vehicle driving.

[0063] S500, according to A i The corresponding target discrete value of the number of plantings and A i The corresponding vegetation cover change rate is used to determine the target plant species from the m types of plants.

[0064] In a specific embodiment, step S500 includes the following steps:

[0065] S501, respectively calculate the sum of the target discrete degree value of the planting quantity corresponding to each type of plant and the corresponding vegetation coverage change rate to obtain m calculation results; in a specific implementation, different weights may also be set according to the importance of the two.

[0066] S502: Determine the plant species corresponding to the minimum value among the m calculation results as the target plant species.

[0067] S600, based on the initial planting quantity corresponding to the target plant species in each of n years, determine the target planting quantity corresponding to the target plant species, so that the total plant carbon fixation amount corresponding to the target plant species in each year can be obtained according to the target planting quantity corresponding to the target plant species; it can be understood as: based on the target planting quantity and the plant carbon fixation amount corresponding to each target plant obtained in step S200, the total plant carbon fixation amount corresponding to the target plant species is obtained.

[0068] Specifically, the target planting quantity corresponding to the target plant meets the following conditions:

[0069] K=(∑ n j＝1 K j ) / n, where K is the target planting quantity corresponding to the target plant, K j is the initial planting quantity of the target plant in the jth year among n years.

[0070] As mentioned above, as the years of plant cultivation increase, the carbon fixation amount of each plant will increase, and the demand for the number of plants will decrease. Therefore, when planting, the average value of the required planting number is selected as the target planting number. While meeting the required planting number in the later stage, the carbon fixation amount in the early stage of planting is also higher.

[0071] In another specific embodiment, after step S400, the target plant species is determined by the following steps:

[0072] S10, respectively calculating the sum of the target discrete degree value of the planting quantity corresponding to each type of plant and the corresponding vegetation coverage change rate, and obtaining m calculation results.

[0073] S20, determining a target planting quantity corresponding to each type of plant according to the initial planting quantity corresponding to each type of plant in each of n years.

[0074] S30, according to the target planting quantity corresponding to each type of plant, select several types of plants that meet the preset planting area of ​​the target section; it can be understood as: according to the preset plant planting interval corresponding to each type of plant, select the plants whose target planting quantity meets the preset planting area.

[0075] S40, determine the minimum value in the calculation results corresponding to the screened several types of plants, and determine the plant species corresponding to the minimum value as the target plant species; in addition, based on the determined target plant species, obtain the target planting quantity corresponding to the target plant species from the target planting quantity corresponding to each type of plant obtained in step S20.

[0076] As mentioned above, after determining the target planting quantity corresponding to each type of plant, since each type of plant occupies a certain spatial area and the vertical projection area of ​​the ground when growing, a certain planting interval should be maintained during planting. Under the requirements of the corresponding planting interval, the plants whose planting quantity meets the preset planting area are screened out, and the plant species corresponding to the minimum value of the calculated result in the screening result is determined as the target plant species, so that the plants can have a higher carbon fixation amount while also ensuring the normal growth of the plants.

[0077] An embodiment of the present invention further provides an electronic device, including a memory and a processor, wherein the memory stores a computer program, and the processor implements the above-mentioned method for calculating the total amount of carbon sequestration in green areas of highways when executing the computer program.

[0078] An embodiment of the present invention further provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the above-mentioned method for calculating the total amount of carbon sequestration in green areas of highways.

[0079] Although some specific embodiments of the present invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It will also be appreciated by those skilled in the art that various modifications may be made to the embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A method for calculating the total amount of carbon sequestration in green areas of highways, characterized in that: The method comprises the following steps: S100, obtaining a plant biomass list W corresponding to a given plant species list A = {W1, W2, ..., W i , ..., W m }, where A={A1,A2,……,A i , ..., A m },W i = {W i1 , W i2 , ..., W ij , ..., W in }, A i is the i-th type of plant, W ij is the plant biomass of the i-th type of plants in the j-th year among the corresponding n selected years, i = 1, 2, ..., m, m is the number of given plant species, j = 1, 2, ..., n, n is the number of years given in advance; S200, according to W ij , get A i The corresponding plant carbon fixation amount E in year j ij , and based on E ij and the total carbon emission of the target road section C obtained in advance, and A i The initial planting quantity corresponding to the jth year; Among them, L ij Meet the following conditions: Among them, L ij A i The initial planting quantity corresponding to the jth year is, is the ceiling rounding function; S300, according to A i The initial planting quantity corresponding to each year in n years is obtained i The corresponding target discrete value of the number of plantings and A i The vegetation coverage FVC corresponding to the jth year ij ; S400, according to A i The vegetation coverage corresponding to each year in n years is obtained i The corresponding vegetation cover change rate; S500, according to A i The corresponding target discrete value of the number of plantings and A i The corresponding vegetation cover change rate determines the target plant species from the m types of plants; S600, based on the initial planting quantity of the target plant species corresponding to each year in n years, determine the target planting quantity corresponding to the target plant species, so that the total amount of plant carbon fixation corresponding to the target plant species in each year can be obtained based on the target planting quantity corresponding to the target plant species.

2. The method for calculating the total amount of carbon sequestration in green areas of highways according to claim 1 is characterized in that: In step S100, W is obtained by the following steps: ij : S101, get A i The plant diameter at breast height D corresponding to the jth year in n years ij and plant height H ij ; Among them, plant diameter at breast height D ij and plant height H ij Both with A i There is a positive correlation between the tree age; S102, according to A i The plant diameter at breast height D corresponding to the jth year in n years ij and plant height H ij , respectively obtain A i The total aboveground biomass B corresponding to the jth year in n years ij and the total underground biomass F ij ; S103, according to A i The total aboveground biomass B corresponding to the jth year in n years ij and the total underground biomass F ij , get W ij ; Among them, W ij Meet the following conditions: W ij =B ij +F ij 。 3. The method for calculating the total amount of carbon sequestration in green areas of highways according to claim 1 is characterized in that: The total carbon emission of the target road section is the sum of the pre-acquired historical carbon emission of the target road section itself and the historical carbon emission of vehicles corresponding to the target road section.

4. The method for calculating the total amount of carbon sequestration in green areas of highways according to claim 1 is characterized in that: In step S300, A is obtained by the following steps: i The corresponding target discrete value of the planting quantity is: S301, according to A i The initial planting quantity corresponding to each year in n years is obtained i The initial discrete value S of the corresponding planting quantity 0 i ; Among them, A i The initial discrete value S of the corresponding planting quantity 0 i Meet the following conditions: S 0 i =(∑ n j＝1 (L ij -∑ n j＝1 L ij / n) 2 / n) 1 / 2 ; S302, normalize the initial discrete degree value of the planting quantity corresponding to each type of plant to obtain A i The corresponding target discrete value S of the planting quantity i ; Among them, A i The corresponding target discrete value S of the planting quantity i Meet the following conditions: S i =S 0 i / ∑ m i＝1 S 0 i 。 5. The method for calculating the total amount of carbon sequestration in green areas of highways according to claim 1 is characterized in that: In step S300, A is obtained by the following steps: i The vegetation coverage FVC corresponding to the jth year ij : S310, according to the preset planting area of ​​the target road section and A i The initial planting quantity corresponding to the jth year is calculated as A i The corresponding average area occupied by each plant is α ij ; S320, acquiring remote sensing images of a plurality of i-th type plants corresponding to the growth state of the j-th year from the region to which the target road section belongs, and acquiring a first vertical projection area corresponding to each i-th type plant based on the remote sensing images of the plurality of i-th type plants; S330, obtaining A according to the first vertical projection area corresponding to each i-th type plant i The second vertical projection area β of each plant in the jth year ij ; Among them, β ij is the average vertical projection area obtained from a number of first vertical projection areas; S340, according to A i The corresponding average area occupied by each plant is α ij and A i The second vertical projection area β of each plant in the jth year ij , get A i The vegetation coverage FVC corresponding to the jth year ij ; Among them, A i The vegetation coverage FVC corresponding to the jth year ij Meet the following conditions: FVC ij =b ij / a ij 。 6. The method for calculating the total amount of carbon sequestration in green areas of highways according to claim 1 is characterized in that: A i The corresponding vegetation cover change rate meets the following conditions: CV i =(∑ n j＝1 (FVC ij -∑ n j＝1 FVC ij / n) 2 / n) 1 / 2 / (∑ n j＝1 FVC ij / n), Among them, CV i A i The corresponding vegetation cover change rate.

7. The method for calculating the total amount of carbon sequestration in green areas of highways according to claim 1 is characterized in that: Step S500 includes the following steps: S501, respectively calculating the sum of the target discrete degree value of the planting quantity corresponding to each type of plant and the corresponding vegetation coverage change rate, and obtaining m calculation results; S502: Determine the plant species corresponding to the minimum value among the m calculation results as the target plant species.

8. The method for calculating the total amount of carbon sequestration in green areas of highways according to claim 1 is characterized in that: The target planting quantity corresponding to the target plant meets the following conditions: K=(∑ n j＝1 K j ) / n, where K is the target planting quantity corresponding to the target plant, K j is the initial planting quantity of the target plant in the jth year among n years.

9. The method for calculating the total amount of carbon sequestration in green areas of highways according to claim 1, characterized in that: After step S400, the target plant species is determined by the following steps: S10, respectively calculating the sum of the target discrete degree value of the planting quantity corresponding to each type of plant and the corresponding vegetation coverage change rate, and obtaining m calculation results; S20, determining a target planting quantity corresponding to each type of plant according to the initial planting quantity corresponding to each type of plant in each year in n years; S30, screening out several types of plants that meet the preset planting area of ​​the target road section according to the target planting quantity corresponding to each type of plant; S40, determining the minimum value among the calculation results corresponding to the selected plant types, and determining the plant type corresponding to the minimum value as the target plant type.

10. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the method for calculating the total amount of carbon sequestration in the greening area of ​​the highway as described in any one of claims 1-9 is implemented.

11. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method for calculating the total amount of carbon sequestration in green areas of highways as described in any one of claims 1 to 9 is implemented.

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