Natural gas project soil function maintenance and improvement compensation value accounting method

Abstract

The application discloses a kind of natural gas project keeps and improves soil function compensation value accounting method, it is related to environmental protection engineering technical field;Including the following steps: the project characteristics of multiple natural gas construction project engineering area are classified, and undisturbed area is selected as control sample plot;Nutrient detection is carried out to the engineering area and the control sample plot;According to the detection result of the nutrient detection, the nutrient of each type engineering area is compared with the nutrient of the control plot, to obtain the recovery period that the engineering area recovers to the nutrient level of the control sample plot;The total value of soil nutrient loss in the engineering area is calculated based on the recovery period.The application can more accurately calculate the compensation value of keeping and improving soil function, lay the foundation for calculating the calculation of natural gas construction project function compensation value, and can evaluate the soil function recovery after natural gas construction damage, with the characteristics of accurate calculation result and strong operability.

Description

Technical Field

[0001] This invention relates to the field of environmental protection engineering technology, specifically to a method for calculating the compensation value of maintaining and improving soil functions in natural gas construction projects. Background Technology

[0002] In 1997, DAILY listed 13 essential functions of life support systems, including air and water purification, flood and drought mitigation, and waste detoxification and degradation. COSTANZA, in assessing global ecosystem service functions, also proposed 17 ecosystem service functions, including atmospheric regulation, climate regulation, and disturbance regulation. In 2004, Chinese scholars expanded upon previous research, classifying ecosystem service functions into 4 major categories and 23 functions. In 2007, based on the aforementioned foundations, ecosystem service functions were further classified for the soil and water conservation sector, including five functions: water source protection and conservation, soil protection and improvement, carbon sequestration and oxygen release, air purification, and windbreak and sand fixation.

[0003] Among them, the function of soil and water conservation refers to the role played or contained by soil and water conservation facilities, landforms and vegetation in protecting soil and water resources, preventing and mitigating disasters, improving the ecology, and promoting social progress.

[0004] In recent years, many scholars have conducted various studies in the field of soil and water conservation function service value. For example, from 2007 to 2008, the Shaanxi Provincial Soil and Water Conservation Bureau and Northwest A&F University conducted the "Research on Compensation Standards for Soil and Water Conservation Functions in Energy Development in Shaanxi Province"; in August 2013, the Ministry of Water Resources also conducted a "Research on Impact Assessment of Soil and Water Conservation Functions in Oil Extraction" specifically for the petroleum industry, selecting five sample oilfields in Shaanxi, Jilin, Inner Mongolia, and other provinces to calculate the value of all soil and water conservation functions per unit area. However, this field remains unexplored in the natural gas industry.

[0005] To accurately estimate the amount of capital required after a construction project is damaged, the value of the damage must first be determined. Therefore, calculating the compensation value for soil and water conservation functions can serve as a reference for the investment in soil and water conservation in construction projects, effectively achieving cost savings and control. Thus, a method for calculating the compensation value of soil and water conservation functions in natural gas construction projects is urgently needed. Furthermore, the accurate calculation of soil preservation and improvement functions, as an important sub-function of soil and water conservation, can lay the foundation for calculating the compensation value of soil and water conservation functions in natural gas construction projects. Summary of the Invention

[0006] This invention provides a method for calculating the compensation value of maintaining and improving soil function in natural gas projects. It can accurately calculate the compensation value of maintaining and improving soil function, lay the foundation for calculating the amount of functional compensation value of natural gas construction projects, and evaluate the recovery of soil function after damage caused by natural gas construction. It has the characteristics of accurate calculation results and strong operability.

[0007] This invention is achieved through the following technical solution:

[0008] This invention provides a method for calculating the compensation value of maintaining and improving soil function in natural gas projects, comprising the following steps:

[0009] S10. Classify the project characteristics of multiple natural gas construction project areas and select undisturbed areas as control sample sites;

[0010] S20. Nutrient testing is performed on the engineering area and the control plot;

[0011] S30. Based on the nutrient detection results, compare the nutrients in each type of engineering area with the nutrients in the control area to obtain the recovery period for the engineering area to recover to the nutrient level of the control area;

[0012] S40. Calculate the total value of soil nutrient loss in the project area based on the recovery period.

[0013] This invention categorizes the project characteristics of multiple natural gas construction project areas, selects undisturbed areas as control plots, and conducts nutrient testing on both the project areas and the control plots. Based on the nutrient testing results, the nutrients in each project area are compared with those in the control plots to determine the recovery period required for the project areas to return to the nutrient levels of the control plots. Finally, based on the recovery period, the total value of soil nutrient loss in the project areas is calculated. This invention can accurately calculate the compensation value for maintaining and improving soil function, laying the foundation for calculating the functional compensation value of natural gas construction projects. It can also evaluate the recovery of soil function after damage caused by natural gas construction, and features accurate calculation results and strong operability.

[0014] In this process, based on the nutrient detection results, the nutrients in various engineering areas are compared with those in the control area to obtain the recovery period for the engineering area to return to the nutrient level of the control area. Finally, based on the recovery period, the total value of soil nutrient loss in the engineering area is calculated. The calculation indicators are clear and concise, and the experimental method is simple and efficient.

[0015] Specifically, the project characteristics include topographic features, year of construction, and region.

[0016] Specifically, the landform features include mountains, hills, and plains.

[0017] Specifically, the time period for the construction period includes less than 1 year, 1 to 5 years, 5 to 10 years, and more than 10 years.

[0018] Specifically, the regional features include roads, pipelines, water tanks, and stations.

[0019] Specifically, the nutrient detection includes the detection of organic matter, available nitrogen, available phosphorus, available potassium, and total nitrogen.

[0020] Specifically, the total value of soil nutrient loss in the project area In the formula:

[0021] U s The total value of soil nutrient loss is expressed in yuan·m³. -2 ;

[0022] n represents the number of soil nutrient species;

[0023] W Δi Let i be the amount of nutrient loss of the i-th type, in kg·m -2 ;

[0024] P i Let be the unit price of the i-th nutrient, in yuan / kg. -1 .

[0025] Specifically, the calculation model for the i-th type of nutrient loss is as follows: In the formula:

[0026] W represents the soil nutrient content in the control project area;

[0027] n represents the number of years required for soil nutrients to fully recover;

[0028] k i Let be the soil nutrient loss coefficient in year i.

[0029] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0030] 1. The method for calculating the compensation value of maintaining and improving soil function in natural gas projects provided by this invention classifies the project characteristics of multiple natural gas construction project areas, selects undisturbed areas as control plots, and conducts nutrient testing on the project areas and the control plots. Then, based on the nutrient testing results, the nutrients of each type of project area are compared with the nutrients of the control plots to obtain the recovery period for the project area to recover to the nutrient level of the control plot. Finally, based on the recovery period, the total value of soil nutrient loss in the project area is calculated. This method can accurately calculate the compensation value of maintaining and improving soil function, laying the foundation for calculating the functional compensation value of natural gas construction projects, and can evaluate the recovery of soil function after damage caused by natural gas construction. It has the characteristics of accurate calculation results and strong operability.

[0031] 2. The method for calculating the compensation value of maintaining and improving soil function in natural gas projects provided by the present invention compares the nutrients in various engineering areas with the nutrients in the control area based on the nutrient detection results, obtains the recovery period for the engineering area to recover to the nutrient level of the control area, and finally calculates the total value of soil nutrient loss in the engineering area based on the recovery period. The calculation indicators are clear and concise, and the experimental method is simple and efficient. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0033] In the attached diagram:

[0034] Figure 1 This is a flowchart illustrating the method for calculating the compensation value of maintaining and improving soil function in natural gas projects according to an embodiment of the present invention. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0036] Example

[0037] Combination Figure 1 This embodiment provides a method for calculating the compensation value of maintaining and improving soil function in natural gas projects, including the following steps:

[0038] S10. Classify the project characteristics of multiple natural gas construction project areas and select undisturbed areas as control plots.

[0039] Specifically, to facilitate the demonstration of this embodiment, an investigation was conducted on natural gas construction projects in Sichuan Province with different landforms (mountains, hills, plains), different years of construction (0-1 year, 1-5 years, 5-10 years, and more than 10 years), and different regions (roads, pipelines, water tanks, and stations), totaling more than 150 survey sites.

[0040] In other words, the project characteristics include topographic features, construction year, and region; the topographic features include mountainous areas, hills, and plains; the construction year includes periods of less than 1 year, 1 to 5 years, 5 to 10 years, and more than 10 years; the regional characteristics include roads, pipelines, water tanks, and stations; and the number of project areas is greater than 150.

[0041] S20. Nutrient testing is performed on the engineering area and the control plot.

[0042] Specifically, in this embodiment, the nutrient detection includes the detection of organic matter, available nitrogen, available phosphorus, available potassium, and total nitrogen.

[0043] S30. Based on the nutrient detection results, compare the nutrients in each type of engineering area with the nutrients in the control area to obtain the recovery period for the engineering area to return to the nutrient level of the control area.

[0044] Specifically, based on the nutrient detection results, a map is created to compare the organic matter, available nitrogen, available phosphorus, available potassium, and total nitrogen in different landforms (mountains, hills, plains), construction years, and areas (roads, pipelines, water tanks, stations) of the project area with the corresponding nutrients in the control sample, thereby determining the recovery time required for plants to return to the plot level. In this embodiment, the average recovery time for plants in the project area to return to the plot level is 4–6 years.

[0045] S40. Calculate the total value of soil nutrient loss in the project area based on the recovery period.

[0046] Specifically, the total value of soil nutrient loss in the project area In the formula:

[0047] U s The total value of soil nutrient loss is expressed in yuan·m³. -2 ;

[0048] n represents the number of soil nutrient species;

[0049] W Δi Let i be the amount of nutrient loss of the i-th type, in kg·m-2 ;

[0050] P i Let be the unit price of the i-th nutrient, in yuan / kg. -1 .

[0051] The calculation model for the i-th type of nutrient loss is as follows: In the formula:

[0052] W represents the soil nutrient content in the control project area;

[0053] n represents the number of years required for soil nutrients to fully recover;

[0054] k i Let be the soil nutrient loss coefficient in year i.

[0055] It should be noted that the increase in soil nutrients was significant in the first two years of restoration in the project area, and the increase slowed down from the third year onwards. Therefore, the loss coefficients for the first two years and the coefficients for the period from the second year to full restoration were calculated separately. Specific indicators for each nutrient are detailed in Tables 1-5.

[0056]

[0057] Table 1 - Loss Coefficients of Organic Matter at Each Stage of Recovery

[0058] In Table 1: r a r represents the loss coefficient for the two years prior to recovery. b The coefficient representing the period from 2 years to full recovery (r in Tables 2-5) a and r b (The definition is the same). "1*" indicates that due to the characteristics of mountainous terrain, the road surface needs to be hardened when constructing roads, which means that the soil nutrient value within the area occupied by the road is completely lost. The loss period is based on the longest period required for restoration of other types of projects in mountainous areas, and the same applies to other types of nutrient loss.

[0059]

[0060] Table 2 - Loss Coefficients of Available Nitrogen at Each Recovery Stage

[0061]

[0062] Table 3 - Loss Coefficients of Available Phosphorus at Each Recovery Stage

[0063]

[0064]

[0065] Table 4 Loss Coefficients of Available Potassium at Each Recovery Stage

[0066]

[0067] Table 5 Loss coefficients at each recovery stage of total nitrogen

[0068] Based on the information in Tables 1-5, the loss of each soil nutrient during the restoration process in the natural gas construction project area can be calculated, and the summarized data is shown in Table 6.

[0069]

[0070] Table 6 shows the soil bulk density distribution in each engineering area obtained by calculating the soil bulk density using the ring cutter method in this embodiment. See Table 7 for details.

[0071] Project Type Plains hills mountainous areas station 2.04 1.95 1.95 pipeline 1.93 1.90 1.87 pool 1.90 1.87 1.93 the way 2.00 1.94 1.94

[0072] Table 7

[0073] In Table 7, the units for the numbers are g·cm. -3

[0074] In addition, this embodiment uses a unit area (m²) when calculating the total nutrient value of the soil. 2 The nutrient loss in the 30cm thick soil layer can be calculated based on Tables 6 and 7, as shown in Table 8.

[0075]

[0076] Table 8

[0077] Based on existing engineering data, the unit price of each soil nutrient component is as follows: organic matter 320 yuan / ton. -1 The conversion factor for available nitrogen to ammonium bicarbonate is 5.882; for available phosphorus to superphosphate, it is 3.373; for available potassium to potassium chloride, it is 1.667; and for total nitrogen to diammonium phosphate, it is 9.4286. The market prices for ammonium bicarbonate, superphosphate, potassium chloride, and diammonium phosphate are RMB 563, 461, 1875, and 2400 per ton, respectively. -1 Therefore, the total value of soil nutrient loss in the engineering area can be calculated using the model, as shown in Table 9.

[0078] Project Type Plains hills mountainous areas station 2.47 3.29 1.47 pipeline 2.26 1.85 1.17 pool 1.97 1.26 1.59 the way 1.92 2.54 7.51

[0079] Table 9

[0080] In Table 9, the units for the numbers are yuan·m. -2

[0081] In summary, this embodiment classifies the project characteristics of multiple natural gas construction project areas, selects undisturbed areas as control plots, and conducts nutrient testing on both the project areas and the control plots. Based on the nutrient testing results, the nutrients in each project area are compared with those in the control plots to obtain the recovery period required for the project areas to return to the nutrient levels of the control plots. Finally, based on the recovery period, the total value of soil nutrient loss in the project areas is calculated. This embodiment can accurately calculate the compensation value for maintaining and improving soil function.

[0082] The compensation value of soil and water conservation functions is a vast system, encompassing multiple functional value factors such as maintaining plant functions, preserving and conserving water resources, and maintaining and improving soil functions. This embodiment accurately calculates the compensation value for maintaining and improving soil functions, laying the foundation for the next step of calculating the functional compensation value of natural gas construction projects.

[0083] In this process, based on the nutrient detection results, the nutrients in various engineering areas are compared with those in the control area to obtain the recovery period for the engineering area to return to the nutrient level of the control area. Finally, based on the recovery period, the total value of soil nutrient loss in the engineering area is calculated. The calculation indicators are clear and concise, and the experimental method is simple and efficient.

[0084] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for calculating the compensation value of maintaining and improving soil function in natural gas projects, characterized in that, Includes the following steps: S10. Classify the project characteristics of multiple natural gas construction project areas and select undisturbed areas as control sample sites; S20. Nutrient testing is performed on the engineering area and the control plot; S30. Based on the nutrient detection results, compare the nutrients in each type of engineering area with the nutrients in the control area to obtain the recovery period for the engineering area to recover to the nutrient level of the control area; S40. Calculate the total value of soil nutrient loss in the engineering area based on the recovery period; The total value of soil nutrient loss in the project area In the formula: The total value of soil nutrient loss is expressed in yuan·m³. -2 ; n represents the number of soil nutrient species; Let i be the amount of nutrient loss of the i-th type, in kg·m -2 ; Let be the unit price of the i-th nutrient, in yuan / kg. -1 ; The calculation model for the i-th type of nutrient loss is as follows: In the formula: This serves as a reference for soil nutrient content within the control project area; n represents the number of years required for soil nutrients to fully recover; Let be the soil nutrient loss coefficient in year i.

2. The method for calculating the compensation value of maintaining and improving soil function in natural gas projects according to claim 1, characterized in that, The project features include topographic features, year of construction, and regional features.

3. The method for calculating the compensation value of maintaining and improving soil function in natural gas projects according to claim 2, characterized in that, The landform features include mountains, hills, and plains.

4. The method for calculating the compensation value of maintaining and improving soil function in natural gas projects according to claim 2, characterized in that, The time period for the construction period includes less than 1 year, 1 to 5 years, 5 to 10 years, and more than 10 years.

5. The method for calculating the compensation value of maintaining and improving soil function in natural gas projects according to claim 2, characterized in that, The area features include roads, pipelines, water tanks, and stations.

6. The method for calculating the compensation value of maintaining and improving soil function in natural gas projects according to claim 1, characterized in that, The nutrient testing includes the detection of organic matter, available nitrogen, available phosphorus, available potassium, and total nitrogen.

Images