Reservoir project stepped water price calculation system and method

Abstract

The invention discloses a stepped water price calculation system and method for reservoir engineering, and relates to the technical field of water conservancy, and the system comprises a first obtaining module which is used for determining a reservoir capacity step corresponding to a water amount step according to the single function relation between the water supply amount and the water supply adjustment reservoir capacity of a reservoir; the second acquisition module is used for determining the cost step of the reservoir according to the single function relationship between the water supply regulation storage capacity and the engineering cost of the reservoir; the first calculation module is used for determining a fixed water rate step according to the construction cost step of the reservoir; the second calculation module is used for calculating an activity water fee and an activity water price according to the design scale and the available water supply amount of the reservoir; and the third calculation module is used for determining the stepped engineering water price according to the active water price and the stepped fixed water price. According to the technical scheme, the corresponding water price can be formulated according to the water quantity steps of the reservoir project, the economical efficiency and social benefits of water supply of the water conservancy project are scientifically reflected by constructing the multi-step water price model, and the method has high application value.

Description

Technical Field

[0001] The present invention relates to the technical field of water conservancy, and in particular to a reservoir engineering stepped water price calculation system and method. Background Art

[0002] The water supply price of a water conservancy project refers to the price of natural water sold by a water supply operator through water conservancy project facilities such as interception, storage, diversion, and lifting, also known as the project water price. As an integral part of the water conservancy public service system, water supply of water conservancy projects is a government behavior to meet the public's needs for water conservancy development or use. When calculating prices, it is necessary to take into account both social and economic benefits. With the development of the economy, the existing pricing methods can no longer meet the needs of the healthy operation of water conservancy projects and the conservation and utilization of water resources under the new situation, and the research on differentiated pricing of water supply has received further attention. As a hot topic in water price reform and research, tiered water prices have received a lot of attention. However, the existing research on tiered water prices mainly focuses on the fields of residential water prices and agricultural water prices, and lacks corresponding research on water conservancy project water supply prices. This is mainly because the water supply price of water conservancy projects is affected by a variety of complex factors, including but not limited to water resource scarcity, water supply costs, user needs, environmental protection requirements, etc. Therefore, based on this problem, this application proposes a tiered water price calculation system and method for reservoir projects. Summary of the invention

[0003] Technical Purpose In order to solve the above problems, the purpose of the present invention is to provide a reservoir project tiered water price calculation system and method, which specifically solves the problem that the water supply price of water conservancy projects is still mainly based on a single cost calculation method. It can not only formulate corresponding water prices according to the water volume tier of the reservoir project, but also scientifically and reasonably reflect the economic and social benefits of water supply of water conservancy projects by constructing a multi-tier water price model. The system and method have a wide range of application scenarios, can better guide the rational allocation and utilization of water resources, and improve the utilization rate of water resources.

[0004] Technical Solution In order to achieve the above-mentioned purpose, the present invention provides a system and method for calculating the tiered water price of a reservoir project. According to the law of diminishing marginal benefits and the principle of price demand elasticity, by analyzing the functional relationship between the water supply and water supply regulation storage capacity of the reservoir, and between the water supply regulation storage capacity of the reservoir and the project cost, the multi-tiered water price model is constructed by combining multiple factors such as water quantity tiers and project cost, fixed water charges, and floating water charges, thereby guiding the rational allocation and utilization of water resources and improving the utilization rate of water resources.

[0005] In a first aspect, the present invention provides a reservoir project tiered water price calculation system, comprising: A first acquisition module is used to determine the storage capacity ladder corresponding to the water quantity ladder according to the single function relationship between the water supply amount of the reservoir and the water supply regulation storage capacity; The second acquisition module is used to determine the cost ladder of the reservoir according to the single function relationship between the water supply regulation storage capacity of the reservoir and the engineering cost; The first calculation module is used to determine the fixed water fee ladder according to the cost ladder of the reservoir; The second calculation module is used to calculate the activity water fee and activity water price according to the design scale and water supply of the reservoir; The third calculation module is used to determine the stepped engineering water price according to the activity water price and the stepped fixed water price.

[0006] Furthermore, in the system: The reservoir is built with different water supply regulating storage capacities at the same site and provides corresponding water supply volumes; The functional relationship between the water supply of the reservoir and the water supply regulating storage capacity, and between the water supply regulating storage capacity of the reservoir and the project cost are all monotonically increasing functions, and within a reasonable range, the functional relationship between the water supply of the reservoir and the water supply regulating storage capacity is an upward convex function; The step water volume of the reservoir is determined according to the step storage capacity; The relationship between fixed water charges and reservoir construction costs, and between floating water charges and water supply are all directly proportional.

[0007] Furthermore, the single function relationship between the water supply of the reservoir and the water supply regulation storage capacity is determined based on the historical operation data of the reservoir and engineering design experience.

[0008] Furthermore, the water volume ladder of the reservoir is determined according to the designed water supply of the reservoir, including the first water volume ladder, the second water volume ladder and the third water volume ladder. It can reflect the changes in the market supply and demand relationship, better guide the rational allocation and utilization of water resources, and improve the utilization efficiency of water resources.

[0009] Furthermore, the water volume of the first water volume step is a certain range lower than the designed water supply of the reservoir, and the water volume within this range can guarantee basic people's livelihood water needs.

[0010] Furthermore, the water volume of the second water volume step is the designed water supply of the reservoir, which is the expected water supply target when the reservoir operates normally.

[0011] Furthermore, the water volume of the third water volume step is a certain range higher than the designed water supply of the reservoir, and the water volume in this range is intended to cope with water supply demand that exceeds design expectations.

[0012] Furthermore, the method of determining the cost ladder of a reservoir based on the single function relationship between the water supply regulation storage capacity of the reservoir and the project cost includes: establishing a single function relationship model between the water supply regulation storage capacity of the reservoir and the project cost based on historical data and engineering experience; and calculating the project cost corresponding to each ladder according to the storage capacity ladder using the established function relationship model to form a cost ladder.

[0013] Furthermore, fixed water charges include depreciation of fixed assets, amortization of intangible assets, allowed earnings and taxes.

[0014] Furthermore, the method of determining the fixed water fee ladder according to the cost ladder of the reservoir specifically includes: according to the cost ladder, according to the calculation method of the fixed water fee, calculating the fixed water fee corresponding to each ladder to form a fixed water fee ladder.

[0015] Furthermore, the activity water fee includes operation and maintenance fees, permitted income and taxes.

[0016] Furthermore, the floating water price includes: calculating the floating water fee per unit water supply based on the designed scale and designed water supply of the reservoir, that is, the floating water price.

[0017] Furthermore, the method of determining the stepped engineering water price based on the active water price and the stepped fixed water price specifically includes: adding the fixed water fee of each step to the active water price to obtain the stepped engineering water price of the step, and arranging the stepped engineering water prices of each step from low to high according to the water volume step to form a complete stepped water price system.

[0018] Furthermore, the tiered targets corresponding to the tiered project water prices include: Provide universal public services with water volume and corresponding water price lower than the designed water supply of the reservoir, and obtain part of the funds for the normal operation of the water source project and return on investment to achieve the normal operation of the water source project.

[0019] By maintaining the designed water supply capacity of the reservoir and the corresponding water price, water supply guarantee that meets the design expectations of the water source project is provided, while obtaining all funds for the normal operation of the water source project and return on investment, so as to achieve sustainable water resources development and utilization activities.

[0020] By using water volume and corresponding water prices that exceed the designed water supply of the reservoir to provide water supply guarantees that exceed the design expectations of the water source project, and at the same time obtain funds that exceed the normal operation of the water source project and the return on investment to further develop and utilize water resources.

[0021] It ensures the smooth operation of water source projects and achieves a reasonable return on investment.

[0022] The system also includes a hydrological prediction module, which is used to analyze the reservoir hydrological process according to the water balance principle, and predict the changes of reservoir hydrological variables over time through system dynamics, so as to provide hydrological data support for the stepped water price model, specifically including: collecting and cleaning historical reservoir hydrological data to ensure the accuracy of hydrological data; determining the input parameters and output results of the hydrological cycle model; calibrating the hydrological model according to historical data to ensure that the model can correctly reflect the actual hydrological changes of the reservoir; verifying the model according to the observation data set, and performing hydrological prediction through the model.

[0023] Among them, the flow prediction formula of the hydrological model is as follows:

[0024] in, Indicates the current flow rate; Indicates the current precipitation amount; Indicates the evaporation amount at the current moment; Indicates the infiltration amount at the current moment; It indicates the flow calculation method determined by the design scale and water supply of the reservoir. Accurate hydrological forecasting helps to rationally allocate and dispatch water resources, improve the utilization efficiency of water resources, consider the sustainable use of water resources, help protect and restore the water ecosystem, and provide a scientific basis for the construction of a tiered water price model.

[0025] Furthermore, the system also includes a machine learning module for analyzing the functional relationship between water consumption and water prices based on the historical operation data of the reservoir, and optimizing the setting of tiered water prices by integrating multiple key factors. It improves the forecast accuracy of medium- and long-term runoff entering the reservoir, helps the reservoir management to carry out water resources planning and management, improves water use efficiency and water-saving effects, and raises the public's awareness of water conservation through more reasonable tiered water price planning, prompting people to take more sustainable water resources management measures.

[0026] In a second aspect, the present invention further provides a method for calculating a stepped water price for a reservoir project, the method being based on the system described in the first aspect, comprising: Determine the storage capacity ladder corresponding to the water quantity ladder according to the single function relationship between the water supply of the reservoir and the water supply regulation storage capacity; Determine the cost ladder of the reservoir based on the single function relationship between the reservoir's water supply regulation storage capacity and the project cost; Determine the fixed water fee ladder according to the cost ladder of the reservoir; Calculate the activity water fee and activity water price based on the designed scale and water supply of the reservoir; The tiered project water price is determined based on the activity water price and the tiered fixed water price.

[0027] In a third aspect, the present invention also provides a computer device, comprising a processor and a memory, wherein the processor is connected to the memory, the memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory, so that the computer device executes the aforementioned method for calculating the tiered water price for reservoir projects.

[0028] In a fourth aspect, the present invention further provides a computer-readable storage medium, wherein a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the aforementioned method for calculating the tiered water price for a reservoir project is implemented.

[0029] The present invention analyzes the functional relationship between the water supply and water supply regulation storage capacity of the reservoir, and the water supply regulation storage capacity of the reservoir and the project cost according to the law of diminishing marginal benefits and the principle of price demand elasticity; combines water quantity ladder with project cost, fixed water fee, active water fee and other factors to construct a multi-step water price model; analyzes the reservoir hydrological process according to the water balance principle, and predicts the change of reservoir hydrological variables over time through system dynamics, providing hydrological data support for the step-type water price model; analyzes the functional relationship between water consumption and water price according to the historical operation data of the reservoir, and optimizes the setting of the step water price by integrating multiple key factors. The system and method have a wide range of application scenarios, can better guide the rational allocation and utilization of water resources, and improve the utilization rate of water resources.

[0030] Beneficial Effects By implementing the reservoir engineering stepped water price calculation system and method provided by the present invention, the following technical effects are achieved: (1) The present invention analyzes the functional relationship between the water supply and water supply regulation capacity of the reservoir, and the water supply regulation capacity of the reservoir and the project cost based on the law of diminishing marginal benefits and the principle of price demand elasticity; it can reflect the changes in market supply and demand, better guide the rational allocation and utilization of water resources, improve the utilization efficiency of water resources, and promote the construction of a water-saving society through differentiated pricing while ensuring basic water demand.

[0031] (2) A multi-tier water price model is constructed by combining water volume tiers with project costs, fixed water charges, and floating water charges. This ensures the smooth operation of water source projects and achieves a reasonable return on investment. Compared with traditional pricing methods, this model is more flexible and adaptable and can be adjusted and optimized according to the actual conditions of different regions and reservoirs.

[0032] (3) The reservoir hydrological process is analyzed according to the principle of water balance, and the changes of reservoir hydrological variables over time are predicted through system dynamics, providing hydrological data support for the stepped water price model. Accurate hydrological prediction helps to rationally allocate and dispatch water resources, improve the utilization efficiency of water resources, take into account the sustainable use of water resources, help protect and restore the water ecosystem, and provide a scientific basis for the construction of the stepped water price model.

[0033] (4) The functional relationship between water consumption and water price is analyzed based on the historical operation data of the reservoir, and the setting of tiered water prices is optimized by integrating multiple key factors. This improves the forecast accuracy of medium- and long-term runoff entering the reservoir, helps reservoir managers to plan and manage water resources, improves water use efficiency and water-saving effects, and raises the public's awareness of water conservation through more reasonable tiered water price planning, prompting people to adopt more sustainable water resource management measures. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to make the above-mentioned reservoir project tiered water price calculation system and method of the present invention more obvious and easy to understand, the following is a brief introduction to the drawings required for use in the specific implementation of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying creative labor.

[0035] Figure 1 A schematic diagram showing the calculation method of the tiered water price for reservoir projects; Figure 2 A schematic diagram showing the relationship between the water supply of the reservoir and the water supply regulation storage capacity; Figure 3 Schematic diagram showing the relationship between reservoir water supply regulation capacity and average daily water supply. DETAILED DESCRIPTION

[0036] Embodiment 1: A reservoir engineering tiered water price calculation system and method are provided, and a reservoir engineering tiered water price calculation method is provided. Figure 1 As shown, the reservoir project tiered water price calculation system includes: a first acquisition module, a second acquisition module, a first calculation module, a second calculation module and a third calculation module, as described in detail below.

[0037] In the system: The reservoir is built with different water supply regulating storage capacities at the same site and provides corresponding water supply volumes; The functional relationship between the water supply of the reservoir and the water supply regulating storage capacity, and between the water supply regulating storage capacity of the reservoir and the project cost are all monotonically increasing functions, and within a reasonable range, the functional relationship between the water supply of the reservoir and the water supply regulating storage capacity is an upward convex function; The step water volume of the reservoir is determined according to the step storage capacity, such as Figure 2 As shown in the figure, W1, W2 and W3 are the reservoir water volume steps, and the corresponding step water volume increases successively. V1, V2 and V3 are the corresponding water supply regulation storage capacities. , , , it is considered that the first-step water volume W1 is provided by the first-step storage capacity V1, and the second-step water volume The second-tier storage capacity Provide, the third tier water volume The third-tier storage capacity supply; The project water fee consists of fixed water fee and floating water fee. The relationship between the fixed water fee and the reservoir cost, and the relationship between the floating water fee and the water supply are all directly proportional.

[0038] The first acquisition module is used to determine the storage capacity step corresponding to the water quantity step according to the single function relationship between the water supply of the reservoir and the water supply regulation storage capacity.

[0039] The single function relationship between the water supply of the reservoir and the water supply regulation storage capacity is determined based on the historical operation data of the reservoir and engineering design experience.

[0040] The water volume steps of the reservoir are determined according to the designed water supply of the reservoir, specifically including the first water volume step, the second water volume step and the third water volume step.

[0041] The water volume of the first water volume step is a certain range lower than the designed water supply of the reservoir, and the water volume within this range can guarantee the basic water demand for people's livelihood.

[0042] The water volume of the second water volume step is the designed water supply of the reservoir, which is the expected water supply target when the reservoir operates normally.

[0043] The water volume of the third water volume step is a certain range higher than the designed water supply of the reservoir, and the water volume in this range is intended to cope with water supply demand that exceeds design expectations.

[0044] The method for determining the cost ladder of a reservoir based on the single function relationship between the water supply regulation storage capacity of the reservoir and the project cost comprises: establishing a single function relationship model between the water supply regulation storage capacity of the reservoir and the project cost based on historical data and engineering experience; and calculating the project cost corresponding to each ladder according to the storage capacity ladder using the established function relationship model to form a cost ladder.

[0045] The second acquisition module is used to determine the cost ladder of the reservoir according to the single function relationship between the water supply regulation storage capacity of the reservoir and the project cost.

[0046] The first calculation module is used to determine the fixed water fee ladder according to the cost ladder of the reservoir.

[0047] Fixed water charges include depreciation of fixed assets, amortization of intangible assets, allowed earnings and taxes.

[0048] Determining the fixed water fee ladder according to the cost ladder of the reservoir specifically includes: calculating the fixed water fee corresponding to each ladder according to the cost ladder and the calculation method of the fixed water fee to form a fixed water fee ladder.

[0049] The second calculation module is used to calculate the activity water fee and water price according to the design scale and water supply of the reservoir.

[0050] Active water charges include operation and maintenance fees, permitted revenues and taxes.

[0051] The floating water price includes: the floating water fee per unit water supply, i.e. the floating water price, is calculated based on the design scale and design water supply of the reservoir.

[0052] The third calculation module is used to determine the stepped engineering water price according to the activity water price and the stepped fixed water price.

[0053] The method of determining the stepped engineering water price based on the active water price and the stepped fixed water price specifically includes: adding the fixed water fee of each step to the active water price to obtain the stepped engineering water price of the step, and arranging the stepped engineering water prices of each step from low to high according to the water volume step to form a complete stepped water price system.

[0054] The tiered targets corresponding to the tiered project water prices include: Provide universal public services with water volume and corresponding water price lower than the designed water supply of the reservoir, and obtain part of the funds for the normal operation of the water source project and return on investment to achieve the normal operation of the water source project.

[0055] By maintaining the designed water supply capacity of the reservoir and the corresponding water price, water supply guarantee that meets the design expectations of the water source project is provided, while obtaining all funds for the normal operation of the water source project and return on investment, so as to achieve sustainable water resources development and utilization activities.

[0056] By using water volume and corresponding water prices that exceed the designed water supply of the reservoir to provide water supply guarantees that exceed the design expectations of the water source project, and at the same time obtain funds that exceed the normal operation of the water source project and the return on investment to further develop and utilize water resources.

[0057] The system also includes a hydrological prediction module, which is used to analyze the reservoir hydrological process according to the water balance principle, and predict the changes of reservoir hydrological variables over time through system dynamics, so as to provide hydrological data support for the stepped water price model, specifically including: collecting and cleaning historical reservoir hydrological data to ensure the accuracy of hydrological data; determining the input parameters and output results of the hydrological cycle model; calibrating the hydrological model according to historical data to ensure that the model can correctly reflect the actual hydrological changes of the reservoir; verifying the model according to the observation data set, and performing hydrological prediction through the model.

[0058] Among them, the flow prediction formula of the hydrological model is as follows:

[0059] in, Indicates the current flow rate; Indicates the current precipitation amount; Indicates the evaporation amount at the current moment; Indicates the infiltration amount at the current moment; It indicates the flow calculation method determined by the design scale and water supply of the reservoir.

[0060] Embodiment 2: This embodiment uses a reservoir in Zhejiang Province as a research area to provide a reservoir engineering tiered water price calculation system and method. A reservoir in Zhejiang Province, as one of the main water sources for the county, has an actual water supply that has reached the reservoir design expectation. The average inflow of the reservoir over the years is 44.9 million cubic meters. After deducting the consumption of ecological environment, irrigation, etc., it can ensure an average daily water supply of 60,000 cubic meters / d for urban and rural water supply, a water supply regulation storage capacity of 10.8 million cubic meters, and an average annual water supply of 21.696 million cubic meters.

[0061] If reservoirs of different sizes are built at the same dam site, the water supply regulation capacity of the reservoir and daily water supply The relationship between them is shown in Table 1.

[0062] Table 1. Relationship between reservoir water supply regulation capacity and daily average water supply

[0063] The relationship between the reservoir water supply and water supply regulation storage capacity is as follows Figure 3 shown.

[0064] Depend on Figure 3 It can be seen that there is a positive single function relationship between the reservoir's water supply and the water supply regulation storage capacity. When the reservoir's water supply increases, the required additional water supply regulation storage capacity will increase accordingly. When the water supply exceeds 84,000 cubic meters / d, the water supply regulation storage capacity will expand significantly.

[0065] The first-tier water volume of the tiered water price is 70% of the designed water supply, the second-tier water volume is the part between the first-tier water volume and the designed water supply, the third-tier water volume is the part between the second-tier water volume and 1.2 times the designed water supply, the fourth-tier water volume is the part between the third-tier water volume and 1.4 times the designed water supply, and the fifth-tier water volume is the part above 1.4 times the designed water supply.

[0066] The tiered water prices calculated based on the marginal effect principle are shown in Table 2, where the activity water price is determined based on the designed water supply scenario.

[0067] Table 2: Tiered water price table calculated based on marginal effect principle

[0068] Depend on Figure 3 As shown in Table 2, if the average daily water supply exceeds 84,000 cubic meters / day, the required additional water supply regulation reservoir capacity will be significantly increased, and the fifth-tier water price will reach 3.691 yuan / cubic meter, which is significantly higher than the fourth-tier water price, indicating that the marginal effect of increasing the water supply regulation reservoir capacity has dropped sharply at this time, and it is not appropriate to further expand the reservoir's water supply capacity. Therefore, it is not appropriate to implement the fifth-tier water price, that is, the reservoir's water supply should not exceed 1.4 times the designed water supply.

[0069] Embodiment 3: Based on the aforementioned embodiment, the system adds a machine learning module to analyze the functional relationship between water consumption and water price based on the historical operation data of the reservoir, and optimizes the setting of tiered water prices by integrating multiple key factors.

[0070] Collect data related to reservoir projects and pre-process the collected data.

[0071] The collected data is trained through an artificial neural network model.

[0072] According to the output results of the artificial neural network model, combined with the cloud model, the certainty of each indicator for different levels is analyzed, and the comprehensive certainty is obtained based on the weight calculation for water price calculation. The formula for the quantitative value and certainty of cloud droplets generated by the forward cloud generator is as follows:

[0073] in, Indicates the certainty of cloud droplets; It represents the quantitative value of cloud droplets; Indicates the center position of the cloud droplet; Indicates the distribution range of cloud droplets; Represents the adjustment parameter, which is used to adjust the distribution density of cloud droplets.

[0074] The calculated weights are multiplied by the degree of certainty matrix of each evaluation factor belonging to each water quality level to obtain the comprehensive degree of certainty of each evaluation factor. The calculation formula is as follows:

[0075] in, represents weight; It represents the degree of certainty matrix, which is used to represent the degree of certainty of each evaluation factor belonging to each water quality level; Represents the adjustment factor, which is used to fine-tune the comprehensive certainty.

[0076] The water price vector is calculated based on the water consumption and economic and social conditions predicted by the machine learning model to obtain the optimized tiered water price.

[0077] For example, suppose ; ; ; ;

[0078] Assumptions ; ; ;

[0079] The effect of the machine learning module is shown in Table 3.

[0080] Table 3. Summary of machine learning module effects

[0081] As shown in Table 3, the reservoir project tiered water price calculation system optimized by the machine learning module can reduce water prices in different water use gradients and improve the water saving rate of the system.

[0082] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable non-transient storage media containing computer-usable program code.

[0083] The present invention can provide computer program instructions to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce means for implementing the system.

[0084] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce a product including an instruction device that implements the functions of the system.

[0085] These computer program instructions may also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, whereby the instructions executed on the computer or other programmable device provide steps for implementing the functions of the system.

Claims

1. A reservoir engineering tiered water price calculation system, characterized by: include: A first acquisition module is used to determine the storage capacity ladder corresponding to the water quantity ladder according to the single function relationship between the water supply amount of the reservoir and the water supply regulation storage capacity; The second acquisition module is used to determine the cost ladder of the reservoir according to the single function relationship between the water supply regulation storage capacity of the reservoir and the engineering cost; The first calculation module is used to determine the fixed water fee ladder according to the cost ladder of the reservoir; The second calculation module is used to calculate the activity water fee and activity water price according to the design scale and water supply of the reservoir; The third calculation module is used to determine the stepped engineering water price according to the activity water price and the stepped fixed water price.

2. The reservoir engineering stepped water price calculation system according to claim 1 is characterized in that: The reservoir is built with different water supply regulating storage capacities at the same site and provides corresponding water supply volumes; The functional relationships between the water supply capacity of the reservoir and the water supply regulating storage capacity, and between the water supply regulating storage capacity of the reservoir and the project cost are all monotonically increasing functions; The step water volume of the reservoir is determined according to the step storage capacity; The relationship between fixed water charges and reservoir construction costs, and between floating water charges and water supply are all directly proportional.

3. The reservoir engineering stepped water price calculation system according to claim 1 is characterized in that: The single function relationship between the water supply of the reservoir and the water supply regulation storage capacity is determined based on the historical operation data of the reservoir and engineering design experience.

4. The reservoir engineering stepped water price calculation system according to claim 1 is characterized in that: The water volume steps of the reservoir include a first water volume step, a second water volume step and a third water volume step, and the water volume of the second water volume step is the designed water supply of the reservoir.

5. The reservoir engineering stepped water price calculation system according to claim 1 is characterized in that: The project water fee includes depreciation of fixed assets, amortization of intangible assets, operation and maintenance expenses, permitted income and taxes.

6. The reservoir engineering stepped water price calculation system according to claim 1 is characterized in that: The system also includes a hydrological prediction module for analyzing the reservoir hydrological process according to the water balance principle, and predicting the changes of reservoir hydrological variables over time through system dynamics, so as to provide hydrological data support for the stepped water price model.

7. The reservoir engineering stepped water price calculation system according to claim 1 is characterized by: The system also includes a machine learning module for analyzing the functional relationship between water consumption and water price based on the historical operating data of the reservoir, and optimizing the setting of tiered water prices by integrating multiple key factors.

8. A reservoir project tiered water price calculation method, characterized by: The method is implemented based on the system according to any one of claims 1 to 7: The method comprises: Determine the storage capacity ladder corresponding to the water quantity ladder according to the single function relationship between the water supply of the reservoir and the water supply regulation storage capacity; Determine the cost ladder of the reservoir based on the single function relationship between the reservoir's water supply regulation storage capacity and the project cost; Determine the fixed water fee ladder according to the cost ladder of the reservoir; Calculate the activity water fee and activity water price based on the designed scale and water supply of the reservoir; The tiered project water price is determined based on the activity water price and the tiered fixed water price.

9. A computer device comprising a processor and a memory, wherein the processor is connected to the memory, and the memory is used to store a computer program, wherein: The processor is used to execute the computer program stored in the memory so that the computer device executes the reservoir project tiered water price calculation method as described in claim 8.

10. A computer-readable storage medium, wherein a computer program is stored in the computer-readable storage medium, characterized in that: When the computer program is executed, the reservoir project tiered water price calculation method of claim 8 is implemented.

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