Water diversion engineering construction effect evaluation method based on energy value analysis

Abstract

The invention discloses a water diversion project construction effect evaluation method based on energy value analysis. The method comprises the following steps: S1, determining a water diversion project construction effect evaluation range and a target; s2, establishing a water diversion project construction effect energy value evaluation index system; s3, collecting data and analyzing input and output; s4, calculating a water supply output energy value; and S5, water supply energy value output rate calculation and construction effect evaluation. According to the invention, an energy value analysis method is adopted to comprehensively consider the ecological values of water supply of the water diversion and transfer project for supporting an ecological system, maintaining biodiversity and the like and the economic values of water supply for production, life and the like; the method makes up the limitation of quantifying the construction effect of the water diversion project from the economic perspective and quantifying the ecological construction effect by depending on the economic output value index in the prior art, fills the blank of the energy value theory in evaluating the ecological economic comprehensive construction effect of the water diversion project, and proposes to evaluate the construction effect of the water diversion project by using the engineering water supply energy value output rate.

Description

Technical Field

[0001] The present invention belongs to the technical field of water conservancy projects, and in particular relates to a method for evaluating the construction effect of a water diversion and regulation project based on energy value analysis. Background Art

[0002] Water diversion and regulation projects promote economic development and improve the ecological environment by optimizing water resource allocation. In the evaluation of project construction effects, it is necessary to comprehensively consider the comprehensive impact of water resource supply on industrial production, people's lives and the ecological environment, and provide an important basis for subsequent project management and scientific decision-making.

[0003] At present, the commonly used methods for quantifying the effects of water diversion and regulation projects from an economic perspective include the apportionment coefficient method, the water shortage loss method, the shadow price method, the alternative project method, and the willingness to pay method. However, these methods generally focus on economic effects, have subjective standards, and have limitations in applicable conditions, lacking comprehensive consideration of the effects of ecological and economic construction. Water diversion and regulation projects focus on the evaluation of economic construction effects, mainly due to the high capital investment and economic return requirements of the project, and investors usually prioritize economic growth and development goals. However, excessive attention to economic construction effects and neglect of ecological construction effects may reduce the accuracy of engineering construction effect evaluation. Therefore, it is proposed to comprehensively consider the economic and ecological construction effects of water diversion and regulation projects from the perspective of energy value. Summary of the invention

[0004] The purpose of the present invention is to provide a method for evaluating the construction effect of water diversion and regulation projects based on energy value analysis, which solves the problem that water diversion and regulation projects focus on economic construction effect evaluation and ecological construction effect evaluation methods ignore the non-economic value of ecosystems and rely too much on economic output value indicators.

[0005] In order to achieve the above object, the present invention adopts the following scheme:

[0006] A method for evaluating the construction effect of a water diversion and regulation project based on energy value analysis comprises the following steps:

[0007] Step S1, determining the scope and objectives of the evaluation of the construction effect of the water diversion project;

[0008] Step S2, establishing an energy value evaluation index system for water diversion and regulation project construction effects;

[0009] Step S3, collecting data and analyzing input and output;

[0010] Step S4, calculating the water supply output energy value;

[0011] Step S5: Calculate the water supply energy value output rate and construction effect evaluation.

[0012] Based on the energy value analysis method, the present invention effectively combines the ecosystem service value with the economic output value index, comprehensively considers the input of natural resources and engineering water supply resources as well as the ecosystem service value and economic output, converts them into energy value, avoids the difficulty of comprehensive evaluation caused by different indicator units, and evaluates the water supply energy value output rate of water diversion and regulation projects with a dimensionless number, thereby improving the objectivity and accuracy of the evaluation of engineering construction effects.

[0013] The energy value analysis method uses a unified energy value standard to comprehensively evaluate the water supply effects of engineering production, life and ecology. This method can include the production systems (such as agriculture and industry), life systems (such as towns and rural areas) and ecosystems of water diversion and regulation projects and water receiving areas into the evaluation scope from a system perspective. After determining the evaluation scope, the input-output analysis of each system is carried out, the energy value analysis table is constructed, the water supply output energy value is calculated, and the construction effect of the water diversion and regulation project is measured by the water supply energy value output rate. It attaches importance to the rational allocation of water resources in various fields, emphasizes the effective use of water supply resources and ecological protection, and has stronger comprehensiveness and scientificity.

[0014] Further optimization, in step S1, the scope of the production system, living system and ecological system in the water receiving area of ​​the water diversion and regulation project is clarified; the goal of this evaluation is determined to quantify the comprehensive impact of the water supply of the water diversion and regulation project on industrial production, people's life and ecological environment, and to construct a framework diagram for evaluating the construction effect of the water diversion and regulation project based on energy value analysis.

[0015] Further optimization, in step S2, the water diversion and regulation project construction effect energy value evaluation index includes the system total input energy value evaluation index and the system total output energy value evaluation index;

[0016] The total input energy value evaluation index of the system includes the input of engineering water supply resources and other inputs;

[0017] The total output energy value of the system includes the output of production and living systems and the output of the ecosystem; among them, the output of the production and living systems is the impact of the water diversion and regulation project on the industrial and agricultural output value and the value of labor recovery, expressed in economic indicators; the output to the ecosystem is the value of the ecological service function improved by the water diversion and regulation project, including non-economic value indicators such as climate regulation, groundwater protection, water quality purification and biodiversity protection.

[0018] Further optimization, in step S3, specifically:

[0019] Step S3.1: Collect various data related to the water diversion project from the project design report, statistical yearbook and water resources bulletin, and analyze the input and output of the production system, living system and ecological system;

[0020] Step S3.2: Clarify the impact of water supply from water diversion and regulation projects on industrial and agricultural production, people's lives and the ecological environment, and calculate the contribution rate of type i water supply resources in water diversion and regulation projects;

[0021] The energy value calculation of type i water supply resources in the water diversion project is shown in formula (1):

[0022] EM Wi =Q i ×τ (1)

[0023] In the above formula: EM Wi represents the energy value of water supply resources of type i of water diversion and regulation project (sej); Q i Indicates the water supply of type i of water diversion project (m 3 ), τ represents the energy conversion rate of water resources, P represents production, D represents life, and B represents ecology;

[0024] The calculation of the contribution rate of water supply resources of type i of water diversion and regulation projects is shown in formula (2):

[0025] WCR i =EM Wi / EM Ti (2)

[0026] In the above formula: WCR i Indicates the contribution rate of water supply resources of type i of water diversion and regulation projects (%); EM Wi represents the energy value of water supply resources of type i of water diversion and regulation project (sej); EM Ti represents the total energy value of system input of type i (sej); P represents production; D represents life; B represents ecology;

[0027] Step S3.3: Calculate the total output energy value of each system in the water diversion project;

[0028] The total output energy value of the production system is converted into energy value based on the industrial and agricultural output value, and the calculation is shown in formula (3):

[0029] EM CP =M P ×EDR (3)

[0030] In the above formula: EM CP represents the total output energy value of the production system (sej); M P represents industrial and agricultural output value (yuan); EDR represents energy value / currency ratio (sej / yuan);

[0031] The total output energy value of the living system is expressed in terms of per capita disposable income based on labor recovery, and is calculated as shown in formula (4):

[0032] EM CD =M PCDI×EC×EDR×Q D / q D (4)

[0033] In the above formula: EM CD represents the total output energy value of the living system (sej); M PCDI represents per capita disposable income (yuan); EC represents the Engel coefficient of the water receiving area (%); q D Indicates annual per capita domestic water consumption (m 3 );Q D Indicates the project’s domestic water supply (m 3 );

[0034] The total output energy value of the ecosystem is based on the ecosystem service value, and the calculation is shown in formula (5):

[0035] EM CB =M S +M R +M C +M W (5)

[0036] In the above formula: EM CB represents the total energy output of the ecosystem (sej); M S represents the biodiversity conservation energy value (sej); M R represents the climate regulation energy value (sej); M C Indicates the energy value of water purification (sej); M W It represents the energy value of protecting groundwater (sej).

[0037] Further optimization, step S4, according to the water supply resource contribution rate of each system and the total output energy value of the system, calculates the water supply output energy value of the water diversion project for production, life, and ecosystem, that is, the economic return and ecological protection construction effects achieved by the project water supply. The water supply output energy value of type i of the water diversion project is calculated as shown in formula (6):

[0038] PEM i =WCR i ×EM Ci (6)

[0039] In the above formula: PEM i represents the water supply output energy value of type i water diversion project (sej); EM Ci Represents the total energy output value of type i system (sej).

[0040] Further optimization, step S5 calculates the ratio between the actual construction effect evaluation of the water diversion and regulation project and the input water resources, reflecting the construction effect and resource utilization efficiency of the project water supply; wherein, the water supply output energy value of the water diversion and regulation project is equal to the sum of the output energy values ​​of various types of water supply, and the calculation is shown in formula (7), the water supply resource energy value of the water diversion and regulation project is calculated as shown in formula (8), and the water supply energy value output rate is calculated as shown in formula (9).

[0041]

[0042] In the above formula: PEM represents the energy value of water supply output of the project, which refers to the impact of water supply on life, production and ecology of the project (sej);

[0043]

[0044] In the above formula: EM W It represents the energy value of water supply resources of the project, which refers to the energy of the resource itself (sej);

[0045]

[0046] In the above formula: R EM It represents the water supply energy value output rate of the project; when the water supply energy value output rate is greater than 1, it shows that the construction effect of the water diversion and regulation project is positive; when the water supply energy value output rate is less than 1, it means that the energy value of water supply resources is greater than the energy value produced by its influence, that is, the behavior of increasing water supply by constructing water diversion and regulation projects cannot bring expected benefits, but leads to waste of resources, which is not worth the loss; the higher the water supply energy value output rate, the higher the return on investment, the more efficient the water supply project is in water resource utilization, and the better the construction effect.

[0047] Compared with the prior art, the present invention has the following beneficial effects:

[0048] 1) The present invention adopts the energy value analysis method to comprehensively consider the ecological value of water supply of water diversion and regulation projects, such as support for the ecosystem and maintenance of biodiversity, and the economic value of water supply to production and life. Taking energy value as the standard, it avoids the comprehensive analysis difficulties caused by different units of conventional indicators and more accurately quantifies the construction effect of water diversion and regulation projects.

[0049] 2) Considering that water supply from water diversion and regulation projects can enhance the ecosystem service value of the receiving areas, the focus of the evaluation of the ecological construction effects of water diversion and regulation projects should be shifted from economic output value to ecosystem service value, reflecting the impact of water diversion and regulation projects on the natural ecological environment.

[0050] 3) Through energy flow analysis, the water supply energy output rate is calculated according to the energy value standard to measure the effect of the project construction, reflecting the relationship between the input of the water diversion project and the water supply output of the project. The dimensionless index avoids the subjective problem of the indicator weight combination, making the construction effect evaluation result clearer and more convenient for managers to quickly understand and make decisions.

[0051] 4) The evaluation method in the present invention can more comprehensively grasp the overall impact of the project. While evaluating the water diversion project to promote economic development, it also pays attention to the ecological and environmental impact of the project, thus truly achieving a win-win situation for economic development and ecological protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 This is a framework diagram for evaluating the construction effect of water diversion and regulation projects;

[0053] Figure 2 This is a schematic diagram of the energy value evaluation index system for water diversion and regulation project construction effects;

[0054] Figure 3 This is a schematic diagram of the input-output of the water diversion and regulation engineering system. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0056] The following is a further description of the quantification method of water diversion project construction effect based on energy value analysis in conjunction with the Yangtze River to Huaihe River Diversion Project (Henan Section), which specifically includes the following steps:

[0057] Step S1, determine the scope and objectives of the evaluation of the construction effect of the water diversion and regulation project. Clarify the scope of the production system, living system and ecological system in the water receiving area of ​​the water diversion and regulation project; determine that the goal of this evaluation is to quantify the comprehensive impact of the water supply of the water diversion and regulation project on industrial production, people's lives and the ecological environment, and construct a framework diagram for the evaluation of the construction effect of the water diversion and regulation project based on energy value analysis, such as Figure 1 shown.

[0058] Step S2, establish an energy value evaluation index system for the construction effect of water diversion and regulation projects. The energy value evaluation index for the construction effect of water diversion and regulation projects includes the system total input energy value evaluation index and the system total output energy value evaluation index; the system total input energy value evaluation index includes the project water supply resource input and other inputs; the system total output energy value includes the production and living system output and the ecosystem output; among them, the output of the production and living system is the impact of the water diversion and regulation project on the industrial and agricultural output value and the value of labor recovery, expressed in economic indicators; the output to the ecosystem is the value of the ecological service function improved by the water diversion and regulation project, including non-economic value indicators such as climate regulation, groundwater protection, water quality purification and biodiversity protection. The energy value evaluation index system for the construction effect of water diversion and regulation projects is as follows: Figure 2 shown.

[0059] Step S3: Collect data and analyze input and output, including:

[0060] Step S3.1: Collect the original data related to the water diversion project from the project design report, statistical yearbook and water resources bulletin, analyze the input and output of production, life and ecological system, and the system input-output table is as follows: Figure 3 shown.

[0061] In this embodiment, data collection and energy conversion of the Yangtze-Huaihe River Diversion Project (Henan Section) are performed. The areas involved in the Yangtze-Huaihe River Diversion Project (Henan Section) are determined, including cities, towns and ecological areas in the water receiving area, inputs and outputs are analyzed, and the construction effects of the project in terms of water resource allocation, ecological environment improvement, and economic development are evaluated. The original data of the project are collected, and the actual water supply of the Yangtze-Huaihe River Diversion Project (Henan Section) is divided into domestic water supply, industrial production water supply and ecological water supply. The water supply volume, project investment, and changes in ecological environment indicators and economic indicators after water supply are determined. Based on solar energy value, the energy conversion rate and energy / currency ratio are searched or calculated to convert different types of resources and construction effects into energy value units. After a lot of research and practice, Odum and researchers from various countries have converted the solar energy conversion rates of the main energy types in nature and human economic society. The energy conversion rate of water bodies is analyzed by referring to the energy flow conversion method of subsystems and engineering subsystems. The surface water energy conversion rate is 8.28×10 11 sej / m 3 , groundwater energy conversion rate is 8.46×10 10 sej / m 3 The energy conversion rate of tap water is calculated by selecting Luhe Water Plant, a supporting project of the Yangtze River to Huaihe River Diversion Project, as 3.35×10 13 sej / m 3 According to the applied energy value in China in 1980, it was 7.19×10 24 sej, the growth rate is 6.3×10 22sej / a, GNP is taken as China's gross national product over the years, and the energy value / currency ratio is calculated.

[0062] Step S3.2: Clarify the impact of water supply from water diversion and regulation projects on industrial and agricultural production, people's lives and the ecological environment, and calculate the contribution rate of type i water supply resources in water diversion and regulation projects;

[0063] The energy value calculation of type i water supply resources in water diversion and regulation projects is shown in formula (1):

[0064] EM Wi =Q i ×τ (1)

[0065] In the above formula: EM Wi represents the energy value of water supply resources of type i of water diversion and regulation project (sej); Q i Indicates the water supply of type i of water diversion project (m 3 ), τ represents the energy conversion rate of water resources, P represents production, D represents life, and B represents ecology;

[0066] The calculation of the contribution rate of water supply resources of type i of water diversion and regulation projects is shown in formula (2):

[0067] WCR i =EM Wi / EM Ti (2)

[0068] In the above formula: WCR i Indicates the contribution rate of water supply resources of type i of water diversion and regulation projects (%); EM Wi represents the energy value of water supply resources of type i of water diversion and regulation project (sej); EM Ti represents the total energy value of system input of type i (sej); P represents production; D represents life; B represents ecology;

[0069] Step S3.3: Calculate the total output energy value of each system in the water diversion project;

[0070] The total output energy value of the production system is converted into energy value based on the industrial and agricultural output value, and the calculation is shown in formula (3):

[0071] EM CP =M P ×EDR (3)

[0072] In the above formula: EM CP represents the total output energy value of the production system (sej); M P represents industrial and agricultural output value (yuan); EDR represents energy value / currency ratio (sej / yuan);

[0073] In this embodiment, the total output energy value of the production system of the Yangtze-Jianghuai River Diversion Project (Henan Section) is calculated based on the industrial production water supply and industrial output value, combined with the energy value conversion rate. Referring to the statistical data of Shangqiu area in 2022, the industrial output value in the statistical yearbook of the region is converted by using the ratio of the water supply of the diversion project to the industrial water consumption of that year, and the industrial output value that may be brought by the project production water supply is obtained as the total output of the production system. The energy value analysis table of the production system is shown in Table 1.

[0074] Table 1 Results of energy value analysis of industrial production system

[0075]

[0076]

[0077] The total output energy value of the living system is expressed in terms of per capita disposable income based on labor recovery, and is calculated as shown in formula (4):

[0078] EM CD =M PCDI ×EC×EDR×Q D / q D (4)

[0079] In the above formula: EM CD represents the total output energy value of the living system (sej); M PCDI represents per capita disposable income (yuan); EC represents the Engel coefficient of the water receiving area (%); q D Indicates annual per capita domestic water consumption (m 3 );Q D Indicates the project’s domestic water supply (m 3 ).

[0080] In this embodiment, the living system is divided into urban and rural areas. Based on the living water situation in the water resources bulletin and the statistical yearbook, the living water situation in the water receiving area where the Yangtze River to Huaihe River Diversion Project (Henan Section) starts to supply water is predicted. The output labor recovery of the living system is replaced by per capita disposable income to calculate the increase in per capita annual living water consumption. The energy value analysis table of the urban living system is shown in Table 2, and the energy value analysis table of the rural living system is shown in Table 3.

[0081] Table 2 Results of energy value analysis of urban living system

[0082]

[0083]

[0084] Table 3 Results of energy value analysis of rural living system

[0085]

[0086]

[0087] The total output energy value of the ecosystem is based on the ecosystem service value, and the calculation is shown in formula (5):

[0088] EM CB =M S +M R +M C +M W (5)

[0089] In the above formula: EM CB represents the total energy output of the ecosystem (sej); M S represents the biodiversity conservation energy value (sej); M R represents the climate regulation energy value (sej); M C Indicates the energy value of water purification (sej); M W It represents the energy value of protecting groundwater (sej).

[0090] In this embodiment, existing methods are used to calculate the values ​​of biodiversity protection, water purification, climate regulation, and groundwater protection, respectively, and the total output energy value of the ecosystem is calculated in combination with the energy value conversion rate.

[0091] The biodiversity conservation value, considering the impact of the project ecological water supply on the organisms in the water receiving area, and considering the regional similarity, we use the biological species of the Yellow River Ancient Channel Wetland Park as a substitute. The wetland park has a total of 308 aquatic species. When the wetland is restored and maintained at a medium level, the ecological water demand of the Yellow River Ancient Channel Wetland Park is 1×10 8 m 3 Considering the average annual water supply return in the Henan section, the ecological water consumption in the river is 1.58×10 8 m 3 , according to the ecological water supply of 1.71×10 8 m 3 It is calculated that the ecological water supply of this project protects 527 aquatic species.

[0092] Climate regulation value, the ecological water supply of the project increases the amount of water in the river. It is known that part of the rainfall replenishes the river and part evaporates. Assuming that the river is dry before the ecological water supply and there is water in the river after the water supply, the evaporation will increase after the water supply. Based on the average temperature, precipitation, and runoff of Shangqiu City from 2010 to 2022, the annual evaporation of ecological water supply is calculated to be 1.61×10 16 J.

[0093] The water purification value is based on the ecological water supply to meet the water purification target. The difference in the content of water pollutants such as ammonia nitrogen, phosphorus and total hardness between the current water quality and the water quality target is calculated based on the water quality representative sections of the receiving area of ​​the Yangtze-Huaihe River Diversion Project (Henan Section).

[0094] Protect the value of groundwater, increase the water volume in the receiving area through engineering water supply, return the ecological water volume occupied by industrial life, curb groundwater over-exploitation, stabilize the groundwater level, and protect the value of groundwater. Calculate the groundwater volume according to the pressure of groundwater extraction 2.65×10 8 m 3 .

[0095] Based on the above analysis and calculation, the ecosystem energy value analysis table is shown in Table 4.

[0096] Table 4 Results of ecosystem energy value analysis

[0097]

[0098] Step S4, calculate the water supply output energy value. According to the water supply resource contribution rate of each system and the total output energy value of the system, calculate the water supply output energy value of the water diversion project for production, life, and ecological system respectively. The water supply output energy value of project type i is calculated as shown in formula (6):

[0099] PEM i =WCR i ×EM Ci (6)

[0100] In the above formula: PEM i represents the energy value of water supply output of project type i (sej); EM Ci Represents the total energy output value of type i system (sej).

[0101] In this embodiment, the output tables of water diversion and regulation project production, urban life, rural life, and ecological water supply energy are shown in Table 5, Table 6, Table 7, and Table 8;

[0102] Table 5 Water supply output energy value of water diversion project

[0103] project Formula or letter data <![CDATA[Engineering industrial production water supply / (m 3 )]]> <![CDATA[Q P ]]> <![CDATA[2.72×10 8 ]]> Energy value of water supply resources for project production / (sej) <![CDATA[EM WP ]]> <![CDATA[2.25×10 20 ]]> Total energy value of industrial production system input / (sej) <![CDATA[EM TP ]]> <![CDATA[4.48×10 22 ]]> Total energy value of industrial production system output / (sej) <![CDATA[EM CP ]]> <![CDATA[6.31×10 22 ]]> Water supply resource contribution rate / (%) <![CDATA[WCR P =EM WP / IN TP ]]> 0.50％ Energy value of water supply production / (sej) <![CDATA[PEM P =WCR P ×EM CP ]]> <![CDATA[3.17×10 20 ]]>

[0104] Table 6 Energy value of urban domestic water supply output from water diversion projects

[0105] project Formula or letter town Water supply resource contribution rate / (%) <![CDATA[WCR D =EM WD / IN TD ]]> 3.66％ Engel coefficient / (%) EC 27.20％ Energy value equivalent to per capita disposable income / (sej / person) <![CDATA[EM PCDI ]]> <![CDATA[3.14×10 15 ]]> <![CDATA[Per capita annual domestic water consumption / (m 3 / person)]]> <![CDATA[q D ]]> 29.93 <![CDATA[Engineering urban domestic water supply volume / (m 3 )]]> <![CDATA[Q D ]]> <![CDATA[1.49×10 8 ]]> Total energy value of urban living system output / (sej) <![CDATA[EM CD ]]> <![CDATA[4.26×10 21 ]]> Energy value of urban domestic water supply output of the project / (sej) <![CDATA[PEM D =WCR D ×EM CD ]]> <![CDATA[1.55×10 20 ]]>

[0106] Table 7 Energy value of rural domestic water supply output from water diversion projects

[0107] project Formula or letter Rural Water supply resource contribution rate / (%) <![CDATA[WCR D =EM WD / IN TD ]]> 3.75％ Engel coefficient / (%) EC 36.00％ Disposable income equivalent energy value / (sej / person) <![CDATA[EM PCDI ]]> <![CDATA[1.33×10 15 ]]> <![CDATA[Per capita annual domestic water consumption / (m 3 / person)]]> <![CDATA[q D ]]> 23.73 <![CDATA[Engineering rural domestic water supply volume / (m 3 )]]> <![CDATA[Q D ]]> <![CDATA[6.70×10 7 ]]> Total energy value of rural living system output / (sej) <![CDATA[EM CD ]]> <![CDATA[1.35×10 21 ]]> Energy value of rural domestic water supply output of the project / (sej) <![CDATA[PEM D =WCR D ×EM CD ]]> <![CDATA[5.09×10 19 ]]>

[0108] Table 8 Ecological water supply output energy value of water diversion project

[0109]

[0110]

[0111] Step S5, calculate the water supply energy value output rate and construction effect evaluation. Calculate the ratio between the actual construction effect evaluation generated by the water diversion and regulation project and the input water resources to reflect the construction effect and resource utilization efficiency of the project water supply; among which, the water supply output energy value of the water diversion and regulation project is equal to the sum of the output energy values ​​of various types of water supply, and the calculation is shown in formula (7), the water supply resource energy value of the water diversion and regulation project is calculated as shown in formula (8), and the water supply energy value output rate is calculated as shown in formula (9).

[0112]

[0113] In the above formula: PEM represents the energy value of water supply output of the project, which refers to the impact of water supply on life, production and ecology of the project (sej);

[0114]

[0115] In the above formula: EM W It represents the energy value of water supply resources of the project, which refers to the energy of the resource itself (sej);

[0116]

[0117] In the above formula: R EM It represents the water supply energy value output rate of the project; when the water supply energy value output rate is greater than 1, it shows that the construction effect of the water diversion and regulation project is positive; when the water supply energy value output rate is less than 1, it means that the energy value of water supply resources is greater than the energy value produced by its influence, that is, the behavior of increasing water supply by constructing water diversion and regulation projects cannot bring expected benefits, but leads to waste of resources, which is not worth the loss; the higher the water supply energy value output rate, the higher the return on investment, the more efficient the water supply project is in water resource utilization, and the better the construction effect.

[0118] In this embodiment, the water supply energy value generated by each unit of water resource energy value input is as shown in Table 9.

[0119] Table 9 Water supply resource energy value output rate of water diversion project

[0120]

[0121] Here is a further analysis of the results:

[0122] (1) Analysis on the rationality of water supply output energy value

[0123] The output energy value of water supply and the energy value of water supply resources are related to the amount of water supply. In the output energy value of water supply, industry>urban life>ecology>rural life. This ranking is consistent with the actual situation to a certain extent. Industry usually has a large demand for water resources and high requirements for water supply stability. The output energy value of industrial water supply accounts for 47.31%. Urban life water supply involves the daily needs of many residents and is closely related to economic activities. Its importance and output energy value are also high, accounting for 23.13%. Ecological water supply is mainly used to maintain ecological balance. Its non-economic value measurement output energy value may be lower than the first two, accounting for 21.64%. Rural life water supply has a relatively low output energy value due to its relatively small scale and demand and low economic level, accounting for 7.60%. The large proportion of ecological output energy value in the total output energy value shows that the value of ecological water supply cannot be ignored, which verifies the importance of comprehensive evaluation of construction effects. (2) Evaluation of the construction effect of water diversion and regulation projects

[0124] The water supply energy value output rate of the Yangtze-Huaihe River Diversion Project (Henan Section) is 1.23>1, which clearly shows that the project has achieved positive results in the utilization of water supply resources. An energy value output rate greater than 1 means that the output energy value of the project is higher than the input energy value, indicating that the project is more efficient in resource allocation, operation and management, and converts water supply resources into higher value.

[0125] The Yangtze-Huaihe River Diversion Project (Henan Section) was selected as the research area to evaluate the construction effect of the project after it was put into operation. The contribution rate of water supply resources and the water supply output energy value of the project were calculated in combination with the project data. The water supply energy output rate showed the relationship between the energy contained in the water supply resources and the actual value generated by the water supply activities, reflecting the effective utilization of the project's water diversion resources. Energy value analysis was used to quantify the construction effect of the project, in order to provide a reference for the evaluation of the construction effect of other water diversion projects. It provides a basis for the reasonable allocation of water resources, optimization of water supply structure and other project operation decisions of the water diversion project.

[0126] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A method for evaluating the construction effect of water diversion and regulation projects based on energy value analysis, characterized in that: The following steps are involved: Step S1, determining the scope and objectives of the water diversion project construction effect evaluation; Step S2, establishing an energy value evaluation index system for water diversion and regulation project construction effects; Step S3, collecting data and analyzing input and output; Step S4, calculating the water supply output energy value; Step S5: Calculate the water supply energy value output rate and construction effect evaluation.

2. The water diversion and regulation engineering construction effect evaluation method based on energy value analysis according to claim 1 is characterized in that: In step S1, the scope of the production system, living system and ecological system in the water receiving area of ​​the water diversion and regulation project is clarified; the goal of this evaluation is determined to quantify the comprehensive impact of the water supply of the water diversion and regulation project on industrial production, people's life and ecological environment, and to construct a framework diagram for evaluating the construction effect of the water diversion and regulation project based on energy value analysis.

3. The water diversion and regulation engineering construction effect evaluation method based on energy value analysis according to claim 1 is characterized in that: In step S2, the water diversion and regulation project construction effect energy value evaluation index includes the system total input energy value evaluation index and the system total output energy value evaluation index; The total input energy value evaluation index of the system includes the input of engineering water supply resources and other inputs; The total output energy value of the system includes the output of production and living systems and the output of the ecosystem; among them, the output of the production and living systems is the impact of the water diversion and regulation project on the industrial and agricultural output value and the value of labor recovery, expressed in economic indicators; the output to the ecosystem is the value of the ecological service function improved by the water diversion and regulation project, including non-economic value indicators such as climate regulation, groundwater protection, water quality purification and biodiversity protection.

4. The water diversion and regulation engineering construction effect evaluation method based on energy value analysis according to claim 3 is characterized in that: In the step S3, specifically: Step S3.1: Collect various data related to the water diversion project from the project design report, statistical yearbook and water resources bulletin, and analyze the input and output of the production system, living system and ecological system; Step S3.2: Clarify the impact of water supply from water diversion and regulation projects on industrial and agricultural production, people's lives and the ecological environment, and calculate the contribution rate of type i water supply resources in water diversion and regulation projects; The energy value calculation of type i water supply resources in the water diversion project is shown in formula (1): IN Wi =Q i ×τ (1) In the above formula: EM Wi represents the energy value of water supply resources of type i of water diversion and regulation project (sej); Q i Indicates the water supply of type i of water diversion project (m 3 ), τ represents the energy conversion rate of water resources, P represents production, D represents life, and B represents ecology; The calculation of the contribution rate of water supply resources of type i of water diversion and regulation projects is shown in formula (2): WCR i =EM Wi / EM Ti (2) In the above formula: WCR i Indicates the contribution rate of water supply resources of type i of water diversion and regulation projects (%); EM Wi represents the energy value of water supply resources of type i of water diversion and regulation project (sej); EM Ti represents the total energy value of system input of type i (sej); P represents production; D represents life; B represents ecology; Step S3.3: Calculate the total output energy value of each system in the water diversion project; The total output energy value of the production system is converted into energy value based on the industrial and agricultural output value, and the calculation is shown in formula (3): EM CP =M P ×EDR (3) In the above formula: EM CP represents the total output energy value of the production system (sej); M P represents industrial and agricultural output value (yuan); EDR represents energy value / currency ratio (sej / yuan); The total output energy value of the living system is expressed in terms of per capita disposable income based on labor recovery, and is calculated as shown in formula (4): EM CD =M PCDI ×EC×EDR×Q D / q D (4) In the above formula: EM CD represents the total output energy value of the living system (sej); M PCDI represents per capita disposable income (yuan); EC represents the Engel coefficient of the water receiving area (%); q D Indicates annual per capita domestic water consumption (m 3 );Q D Indicates the project’s domestic water supply (m 3 ); The total output energy value of the ecosystem is based on the ecosystem service value, and the calculation is shown in formula (5): EM CB =M S +M R +M C +M W (5) In the above formula: EM CB represents the total energy output of the ecosystem (sej); M S represents the energy value of biodiversity conservation (sej); M R represents the climate regulation energy value (sej); M C Indicates the energy value of water purification (sej); M W It represents the energy value of protecting groundwater (sej).

5. The water diversion and regulation engineering construction effect evaluation method based on energy value analysis according to claim 4 is characterized in that: In step S4, the water supply output energy value of the water diversion project to the production system, the living system and the ecological system is calculated according to the water supply resource contribution rate of each system and the total output energy value of the system, that is, the economic return and ecological protection construction effects achieved by the water supply project. The water supply output energy value of type i of the water diversion project is calculated as shown in formula (6): PEM i =WCR i ×EM Ci (6) In the above formula: PEM i represents the output energy value of water supply of type i water diversion project (sej); EM Ci Represents the total energy output value of type i system (sej).

6. The water diversion and regulation engineering construction effect evaluation method based on energy value analysis according to claim 5 is characterized in that: The step S5 calculates the ratio between the actual construction effect evaluation of the water diversion and regulation project and the input water resources, reflecting the construction effect and resource utilization efficiency of the water supply project; wherein, the water supply output energy value of the water diversion and regulation project is equal to the sum of the output energy values ​​of various types of water supply, and the calculation is shown in formula (7), the water supply resource energy value of the water diversion and regulation project is calculated as shown in formula (8), and the water supply energy value output rate is calculated as shown in formula (9). In the above formula: PEM represents the energy value of water supply output of the project, which refers to the impact of water supply on life, production and ecology of the project (sej); In the above formula: EM W It represents the energy value of water supply resources of the project, which refers to the energy of the resource itself (sej); In the above formula: R EM It represents the water supply energy value output rate of the project; when the water supply energy value output rate is greater than 1, it shows that the construction effect of the water diversion and regulation project is positive; when the water supply energy value output rate is less than 1, it means that the energy value of water supply resources is greater than the energy value produced by its influence, that is, the behavior of increasing water supply by constructing water diversion and regulation projects cannot bring expected benefits, but leads to waste of resources, which is not worth the loss; the higher the water supply energy value output rate, the higher the return on investment, the more efficient the water supply project is in water resource utilization, and the better the construction effect.

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