Water pricing method based on linkage of metering accuracy correction and water saving amount

Abstract

The application discloses a water price pricing method based on metering precision correction and water saving quantity linkage, divides an irrigation area into several independent pricing units, calculates the basic water price of each pricing unit, determines a water saving quantity linkage coefficient according to the proportion of the water saving quantity of each pricing unit in the approved water consumption index, and the water saving quantity linkage coefficient is negatively correlated with the water saving quantity proportion; the measurement error of the water consumption metering facility of each pricing unit is determined, the metering precision correction coefficient is determined according to the measurement error, and the metering precision correction coefficient is negatively correlated with the measurement error; the initial water price of each pricing unit is calculated, the initial water price = the basic water price * the water saving quantity linkage coefficient * the metering precision correction coefficient; the final water price of each pricing unit is calculated in combination with the initial water price and the water consumption; each factor influencing the final water price is dynamically adjusted in the next pricing period. The metering precision correction coefficient is introduced in the process of water price pricing, so that the rationality of water price pricing is improved.

Description

Technical Field

[0001] This invention relates to the field of irrigation district water pricing technology, and in particular to an irrigation district water pricing method based on the linkage between metering accuracy correction and water saving. Background Technology

[0002] Large and medium-sized irrigation districts are the core carriers of agricultural irrigation in my country and also the main areas of water consumption. Currently, water pricing in my country's large and medium-sized irrigation districts mainly adopts traditional methods such as government pricing, negotiated pricing, or "permitted cost + reasonable profit" pricing, combined with a progressive pricing system for exceeding quotas for auxiliary regulation. However, in practice, the accuracy of water metering facilities has not been taken into consideration in pricing. In some irrigation districts, the metering facilities are incomplete and the measurement error is large, resulting in inaccurate water consumption statistics, which in turn affects the rationality of water pricing. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, the present invention provides a water pricing method for irrigation districts based on the linkage between metering accuracy correction and water saving. The metering accuracy correction coefficient is incorporated into the water pricing process to improve the rationality of water pricing.

[0004] Technical Solution: To achieve the above objectives, the present invention provides a water pricing method for irrigation districts based on metering accuracy correction and water-saving linkage, comprising the following steps: S1: Within a pricing cycle, the irrigation district is divided into several independent pricing units, basic data for each pricing unit is collected, and the basic water price for each pricing unit is calculated; S2: Based on the proportion of water saving in each pricing unit to the approved water consumption quota, a water-saving linkage coefficient is determined, which is negatively correlated with the proportion of water saving; S3: The measurement error of the water metering facilities in each pricing unit is measured, and a metering accuracy correction coefficient is determined based on the measurement error, which is negatively correlated with the measurement error; S4: The initial water price for each pricing unit is calculated: Initial water price = Basic water price × Water-saving linkage coefficient × Metering accuracy correction coefficient; Combining the initial water price and water consumption, the final water price for each pricing unit is calculated; S5: Entering the next pricing cycle, dynamic adjustments are made to various factors affecting the final water price.

[0005] Furthermore, in S3, the measurement error is... And set precise thresholds. and failure threshold ;when When the metering facility is in a precise state, no correction is made to the metering accuracy; when... When the metering facility is deemed to be in a malfunctioning state, a rectification prompt for the metering facility is triggered; when When the measurement facility is in an error state, the measurement accuracy is corrected. The measurement error and the measurement accuracy correction coefficient are divided into multiple levels, with the measurement error level from low to high corresponding to the measurement accuracy correction coefficient level from high to low.

[0006] Furthermore, in S3, when the metering facility is in an error state, and the measurement error... Belongs to the first from low to high When in the first gear, the first The upper and lower limits of the measurement error for each gear are respectively and , No. The measurement accuracy correction factor corresponding to the measurement error of each gear is: Then the measurement accuracy correction factor Simultaneously satisfy and .

[0007] Furthermore, in S3, for the first... For each measurement error level, there exists a correction balance value. satisfy And define the corrected equilibrium ratio. for:

[0008] ;

[0009] As the measurement error level increases, the balance correction rate increases. Gradually decreasing.

[0010] Furthermore, in S5, after entering the next pricing cycle, the measurement error of the water metering facilities in each pricing unit is re-measured; within a continuous pricing cycle, if the metering facilities of a certain pricing unit are all in an error state, and the measurement error of that pricing unit has not decreased compared to the previous pricing cycle, then the metering accuracy correction coefficient of that pricing unit is increased based on the previous pricing cycle.

[0011] Furthermore, in S1, each pricing unit corresponds to a clearly defined water user, water usage index, and metering node. The collected basic data includes irrigation project operation and maintenance costs, reasonable expected returns, crop planting types and areas, water usage metering data, water saving data, water resource inflow data, water rights trading data, and water user affordability data.

[0012] Furthermore, in S1, the base water price for each pricing unit is calculated based on the crop planting type.

[0013] Furthermore, in S2, the proportion of current water saving to the approved water use index is divided into multiple levels, and the water saving linkage coefficient is also divided into multiple levels. The water saving proportion levels from high to low correspond to the water saving linkage coefficient levels from high to low.

[0014] Furthermore, in S4, a progressive pricing mechanism for exceeding the quota is established; when the water consumption of a pricing unit exceeds the approved water consumption target, a price increase is applied to the excess portion, and the final water price is calculated by combining the initial water price with the excess price increase.

[0015] Furthermore, in S5, a water rights trading revenue sharing and feedback mechanism is established; a certain percentage of the water rights trading revenue is extracted as water price adjustment funds, and the adjustment amount is allocated according to the water-saving contribution of each pricing unit; after entering the next pricing cycle, the base water price of the corresponding pricing unit is reduced according to the allocated adjustment amount.

[0016] Beneficial Effects: The irrigation district water pricing method based on metering accuracy correction and water saving linkage of the present invention has the following beneficial effects:

[0017] 1) Incorporate a metering accuracy correction coefficient into the water pricing process. The metering accuracy correction coefficient is negatively correlated with the measurement error. Therefore, when the measurement error is large, the upper limit of water users' losses will be reduced, thereby improving the rationality of water pricing.

[0018] 2) When the measurement error is large, the expected value of the initial water price will decrease accordingly. Therefore, a step-by-step escalation mechanism for the metering accuracy correction coefficient is introduced. If the measurement error of the pricing unit has not decreased compared to the previous pricing cycle, the metering accuracy correction coefficient of the pricing unit will be escalated based on the previous pricing cycle. This can encourage water users to actively upgrade and maintain water metering facilities, reduce measurement errors, and benefit the management of irrigation districts. Attached Figure Description

[0019] Appendix Figure 1 This is a schematic diagram of the pricing process of the present invention. Detailed Implementation

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] As attached Figure 1 The irrigation district water pricing method based on metering accuracy correction and water saving linkage includes the following steps.

[0022] S1: Within a pricing cycle, the irrigation district is divided into several independent pricing units, basic data of each pricing unit is collected, and the basic water price of each pricing unit is calculated.

[0023] When dividing the irrigation district into pricing units, the district is divided into several independent pricing units based on its water resource endowment, water rights allocation scheme, and tiered management scope. Water resource endowment includes annual precipitation, total water resources, and available irrigation water. The water rights allocation scheme needs to clearly define water usage quotas for rural collective economic organizations, farmer water cooperatives, and individual water users. The tiered management scope includes the main irrigation projects and the terminal canal system.

[0024] Each pricing unit corresponds to a clearly defined water user, water usage index, and metering node. The division of pricing units should be combined with the property rights demarcation points between the main irrigation projects and the terminal canal system in the irrigation district to ensure that the water usage metering of each pricing unit is traceable and the water rights responsibility can be implemented. It can be divided into pricing units for main irrigation projects, pricing units for terminal canal systems, and tiered pricing units for water users, which is in line with the reform requirements for the detailed decomposition of water rights.

[0025] The basic data to be collected includes irrigation project operation and maintenance costs, reasonable expected returns, crop planting types and areas, water usage metering data, water saving data, water resource inflow data, water rights trading data, and water user affordability data. Irrigation project operation and maintenance costs include direct costs such as canal maintenance, equipment upkeep, personnel salaries, and energy consumption. Reasonable expected returns are determined based on the operational needs of the irrigation district management unit and the water-saving project operator. Crop planting types and areas are used to distinguish between food crops, cash crops, and aquaculture. Water usage metering data can be collected through the irrigation district's online metering and monitoring system, including current actual water usage and historical average water usage. Water saving data can be calculated by the difference between the approved water usage quota and the actual water usage, and the impact of force majeure factors such as abnormal water inflow must be deducted. Water resource inflow data includes annual precipitation and canal headwater inflow. Water rights trading data comes from data filed on the water rights trading platform, including traded water volume, traded price, and traded revenue. Water user affordability data can be determined through surveys and statistics, combined with the local agricultural economic development level.

[0026] When calculating the base water price, the base water price for each pricing unit is calculated separately according to the crop planting type. For grain crops, the base water price shall not be lower than the operation and maintenance cost of the irrigation project to ensure the basic operational needs of the irrigation project. For cash crops and aquaculture, the base water price is calculated according to the principle of "permitted cost + reasonable profit," where the permitted cost is the reasonable cost of operation and maintenance of the irrigation project, and the reasonable profit is determined according to the industry average rate of return. At the same time, the base water price shall not exceed the reasonable affordability range of the water user.

[0027] S2: Determine the water-saving linkage coefficient based on the proportion of water saving in each pricing unit to the approved water consumption index. The water-saving linkage coefficient is negatively correlated with the proportion of water saving.

[0028] In S2, the proportion of current water saving to the approved water use index is divided into multiple levels, and the water saving linkage coefficient is also divided into multiple levels. The water saving proportion level from high to low corresponds to the water saving linkage coefficient level from high to low.

[0029] For example, the value range of the water-saving linkage coefficient is 0.7-1.0. The specific value standard is as follows: when the water-saving amount accounts for ≥20% of the approved water consumption quota, the linkage coefficient is 0.7, and the maximum water-saving discount is given; when the proportion is between 10% and 20%, the linkage coefficient is 0.8-0.9, and the water-saving discount is given proportionally; when the proportion is <10%, the linkage coefficient is 1.0, and no water-saving discount is given; when there is no water saving or the water consumption exceeds the quota, the linkage coefficient is 1.0-1.2, and the water price is appropriately increased to strengthen the binding effect.

[0030] S3: Measure the measurement error of the water metering facilities in each pricing unit, and determine the metering accuracy correction coefficient based on the measurement error. The metering accuracy correction coefficient is negatively correlated with the measurement error.

[0031] First, the measurement error discussed in this article refers to random error, not systematic error. Systematic error, on the other hand, would always be either too large or too small. If the measured value is consistently greater than the actual value, it indicates that the metering facility's measurement results are too high, resulting in losses for the water user, which would typically require compensation. If the measured value is consistently less than the actual value, it indicates that the metering facility's measurement results are too low, resulting in losses for the project operator. However, in this case, it would be difficult to collect water fees from the user, and the handling process would be relatively complex. The measurement error discussed in this article is random error, meaning that the error of the metering facility is random, and its fluctuations could be either too large or too small.

[0032] When measurement errors are large, it's possible for a user's actual water consumption to be less than the measured consumption. Furthermore, as the measurement error increases, the user's potential loss also increases. Therefore, directly charging the user at the original water price could easily lead to user dissatisfaction. Thus, the project operator needs to offer a certain degree of concession, which involves adjusting the initial water price using a metering accuracy correction factor, ensuring that this factor is negatively correlated with the measurement error. The larger the measurement error, the smaller the metering accuracy correction factor, resulting in a lower initial water price. This prevents the user's potential loss from increasing with the measurement error, avoiding situations where users incur huge losses in extreme circumstances.

[0033] In S3, let the measurement error be... And set precise thresholds. and failure threshold .

[0034] when When the metering facility is in a precise state, no correction is made to the metering accuracy. In one embodiment, the precision threshold is... The measurement error of a metering facility is set at 5%. When the measurement error of the metering facility is less than 5%, the metering facility is considered to be in a precise state, and the measurement data is considered to be accurate. Therefore, no correction is required for the measurement accuracy, or the measurement accuracy correction factor is set to 1.

[0035] when When this occurs, the metering facility is determined to be in a faulty state, triggering a rectification prompt. In one embodiment, a fault threshold is defined. The metering accuracy correction factor is set at 15%. When the measurement error of the metering facility exceeds 15%, the facility is considered ineffective, and the metering data is deemed unable to accurately represent the actual water consumption. In this case, a rectification notice will be triggered, notifying the irrigation district management unit to rectify the metering facility within a specified period to ensure the accuracy of subsequent metering data. At this point, a lower metering accuracy correction factor can be used, such as 0.9 or 0.85, to reduce the upper limit of water user losses.

[0036] when When the measurement facility is in an error state, the measurement accuracy is corrected. The measurement error and the measurement accuracy correction coefficient are divided into multiple levels, with the measurement error level from low to high corresponding to the measurement accuracy correction coefficient level from high to low.

[0037] In one embodiment, when the measurement error is between 5% and 10%, the corresponding measurement accuracy correction factor is 0.95; when the measurement error is between 10% and 15%, the corresponding measurement accuracy correction factor is 0.9.

[0038] In another embodiment, the measurement error levels can be further subdivided. When the measurement error is between 5% and 7.5%, the corresponding measurement accuracy correction factor is 0.975; when the measurement error is between 7.5% and 10%, the corresponding measurement accuracy correction factor is 0.95; when the measurement error is between 10% and 12.5%, the corresponding measurement accuracy correction factor is 0.925; and when the measurement error is between 12.5% ​​and 15%, the corresponding measurement accuracy correction factor is 0.9.

[0039] S4: Calculate the initial water price for each pricing unit. Initial water price = base water price × water saving linkage coefficient × metering accuracy correction coefficient; combine the initial water price and water consumption to calculate the final water price for each pricing unit.

[0040] Specifically, in S4, a progressive pricing mechanism for exceeding water consumption quotas is established. When the water consumption of a pricing unit exceeds its approved water consumption target, a price increase is applied to the excess portion. The final water price is calculated by combining the initial water price with the price increase for exceeding the quota. In one embodiment, the final water price is calculated as follows: the initial water price for each pricing unit is calculated using the formula "Initial Water Price = Basic Water Price × Water Saving Linkage Coefficient × Metering Accuracy Correction Coefficient" by combining the base water price, water saving linkage coefficient, and metering accuracy correction coefficient; then, the progressive price increase for exceeding the quota is added to obtain the final water price for the current period. The progressive pricing for exceeding the quota is divided into three levels, with strict control over the surcharge. Specifically: for the portion exceeding the quota by 5%-20% (inclusive), the surcharge is 50% of the basic water price; for the portion exceeding the quota by 20%-50% (inclusive), the surcharge is 100% of the basic water price; and for the portion exceeding the quota by more than 50%, the surcharge is 200% of the basic water price. The final price after the surcharge shall not exceed 300% of the current normal water price standard to avoid increasing the burden on water users.

[0041] S5: Enter the next pricing cycle and dynamically adjust the various factors affecting the final water price.

[0042] Revenue Sharing and Feedback Adjustment: A revenue sharing and feedback mechanism for water rights trading will be established, allocating 10%-20% of the revenue from water rights trading as water price adjustment funds. The specific allocation percentage will be determined based on the scale of water rights trading and the operational needs of the irrigation district. The adjustment amount will be allocated according to the proportion of water savings in each pricing unit to the total water savings in the irrigation district. The higher the proportion of water savings to total water savings, the larger the allocation will be. This will be used to lower the base water price for the corresponding pricing unit, further incentivizing water users to conserve water.

[0043] Furthermore, upon entering the next pricing cycle, the base water price, water-saving linkage coefficient, and progressive surcharge for exceeding quotas will be adjusted periodically based on changes in water inflow, fluctuations in irrigation project operation and maintenance costs, dynamics of the water rights trading market, and changes in water users' affordability. The dynamic adjustment cycle is typically once a year, but may be shortened to once every six months in special years. After adjustment, the adjustments must be publicized to water users through irrigation district channels. Once no objections are raised during the public notice period, the adjustments will be formally implemented to ensure the rationality and adaptability of water pricing.

[0044] Specifically, when water resources fluctuate, the base water price can be appropriately increased in drought years when water inflow is reduced, and appropriately decreased in wet years when water inflow is sufficient. Fluctuations in the operation and maintenance costs of irrigation projects, including equipment upgrades and increased labor costs, can lead to corresponding adjustments to the base water price. If water rights trading market prices fluctuate significantly, the revenue extraction ratio and adjustment amount can be adjusted.

[0045] When setting specific values ​​for the metering accuracy correction factor in S3, it's important to reduce the upper limit of losses for water users in extreme cases, but it's also crucial to avoid a correction factor that's too small, preventing water users from incurring any losses at all. For example, when the measurement error is between 5% and 10%, assuming a corresponding metering accuracy correction factor of 0.9, even if the measured value is 10% larger than the true value, since 0.9 × 1.1 = 0.99, the user will not incur any losses. In this case, a larger measurement error in the water metering facility is entirely beneficial to the water user. Therefore, water users will tend to retain water metering facilities with larger measurement errors, which is detrimental to promoting the maintenance and upgrading of water metering facilities.

[0046] Therefore, in S3, when the metering facility is in an error state, and the measurement error... Belongs to the first from low to high When in the first gear, the first The upper and lower limits of the measurement error for each gear are respectively and , No. The measurement accuracy correction factor corresponding to the measurement error of each gear is: When specifying a measurement accuracy correction factor, the measurement accuracy correction factor is... Must meet simultaneously and .in, This ensures that water users may still incur losses even when measurement errors are significant. This can reduce the upper limit of losses for water users.

[0047] In S3, for the first For each measurement error level, there exists a correction balance value. satisfy And define the corrected equilibrium ratio. for:

[0048] ;

[0049] As the measurement error level increases, the balance correction rate increases. It gradually decreases. In other words, as the measurement error level increases, the correction balance value decreases. It will get closer and closer to Therefore, when the measurement error increases, the increase in the user's upper limit of loss will decrease, or the user's upper limit of loss will decrease.

[0050] However, while introducing a metering accuracy correction factor lowers the upper limit of water users' losses, it also reduces the expected value of the initial water price. For example, when the measurement error is between 5% and 10%, the corresponding metering accuracy correction factor is 0.95. When the measured value is 10% larger than the actual value, since 0.95 × 1.1 = 1.045, the upper limit of loss is equivalent to a loss of at most 4.5% compared to the actual situation, thus lowering the upper limit of loss. However, since measurement error is random, the measured value may be larger or smaller than the actual value, so the expected value of the initial water price is actually only 0.95. Furthermore, because the metering accuracy correction factor is negatively correlated with the measurement error, as the measurement error increases, the metering accuracy correction factor decreases, and the expected value of the water price for water users also decreases accordingly. Therefore, in the long run, if the measurement error of water metering facilities remains at a high level, the expected value of the initial water price for water users will actually be smaller. This will lead water users to retain water metering facilities with larger measurement errors, which is not conducive to promoting the maintenance and upgrading of water metering facilities.

[0051] To address the aforementioned issues, this case also introduces a tiered escalation mechanism for metering accuracy correction coefficients. In S5, upon entering the next pricing cycle, the measurement error of the water metering facilities in each pricing unit is re-measured. Within consecutive pricing cycles, if all metering facilities in a pricing unit are in an error state, and the measurement error of that pricing unit has not decreased compared to the previous pricing cycle, then the metering accuracy correction coefficient for that pricing unit is escalated based on the previous pricing cycle, until the metering accuracy correction coefficient reaches the highest tier. If all metering facilities in a pricing unit are in an error state, and the measurement error of that pricing unit has decreased compared to the previous pricing cycle, then the metering accuracy correction coefficient is reset to correspond to the decreased tier.

[0052] Taking the measurement error between 5% and 7.5% as an example, the measurement accuracy correction factor is 0.975; the measurement error between 7.5% and 10% as an example, the measurement accuracy correction factor is 0.95; the measurement error between 10% and 12.5% ​​as an example, the measurement accuracy correction factor is 0.925; and the measurement error between 12.5% ​​and 15% as an example, and assuming that each positioning cycle is one year.

[0053] In the first year, the measurement error of pricing unit A is 13.8%, corresponding to a measurement accuracy correction factor of 0.9. In the second year, if the measurement error of pricing unit A decreases, for example to 9.3%, falling within the 7.5%-10% range, then the measurement accuracy correction factor will also be 0.95. In the second year, if the measurement error of pricing unit A does not decrease and remains between 12.5%-15%, for example at 13.1%, then the measurement accuracy correction factor for pricing unit A will be increased from 0.9 to 0.925. In the third year, if the measurement error of pricing unit A still does not decrease and remains between 12.5%-15%, then the measurement accuracy correction factor for pricing unit A will be increased again, from 0.925 to 0.95, and so on, increasing year by year until the measurement accuracy correction factor reaches the highest level, 0.975.

[0054] After introducing a tiered adjustment mechanism for metering accuracy correction factors, water users with larger measurement errors cannot continue using lower correction factors. Therefore, the expected initial water price for these users increases annually, as does the potential upper limit of losses. This incentivizes users to proactively upgrade and maintain their water metering facilities to reduce measurement errors. Reduced measurement errors facilitate irrigation district management. Furthermore, because the metering accuracy correction factor is increased gradually each year, sufficient time is allocated for users to upgrade their water metering facilities.

[0055] This embodiment uses a large-scale experimental irrigation area as an example to specifically implement the water pricing method of the present invention. The total area of ​​the experimental irrigation area is 500,000 mu, of which 350,000 mu are planted with grain crops and 150,000 mu are planted with cash crops. The irrigation area has completed the clarification of water rights, and water use quotas have been allocated to 20 farmer water user cooperatives. It has online metering and monitoring capabilities and has carried out water rights trading pilot projects, which meets the application conditions of the present invention. The specific implementation steps are as follows.

[0056] S1: First, the pricing units are divided. The water resource endowment of the experimental irrigation area is an annual precipitation of 800 mm, a total water resource volume of 120 million cubic meters, and an irrigation water supply of 100 million cubic meters. There are 20 farmer water user cooperatives, each with an approved water use quota of 5 million cubic meters. Based on the water resource endowment, water rights allocation scheme, and the tiered management scope of the irrigation area, the experimental irrigation area is divided into 20 independent pricing units, each corresponding to one farmer water user cooperative. The metering node is set at the outlet of the final canal system. The water rights responsibility and metering traceability path of each pricing unit are clearly defined. Among them, 14 pricing units are mainly for grain crop cultivation, and 6 pricing units are mainly for cash crop cultivation.

[0057] Then, basic data for each pricing unit was collected, as follows: the average operation and maintenance cost of irrigation projects is 0.3 yuan / cubic meter; the reasonable expected return is the industry average return rate of 8%; the planting area of ​​grain crops (wheat and rice) is 350,000 mu, and the planting area of ​​cash crops (fruits, vegetables, and cotton) is 150,000 mu; water metering data is collected through the irrigation district's online metering and monitoring system, and the actual water consumption in the current period is an average of 4.5 million cubic meters / pricing unit; water saving data is the difference between the approved water consumption target of 5 million cubic meters and the actual water consumption, averaging 500,000 cubic meters / pricing unit, with no force majeure impact; water resource inflow data is the current inflow of 105 million cubic meters from the canal head, which meets irrigation needs; water rights trading data is the current total water rights trading volume in the irrigation district is 8 million cubic meters, with a trading revenue of 4 million yuan; a survey of water users' affordability shows that the maximum affordability of water prices for grain crops is 0.4 yuan / cubic meter, and the maximum affordability of water prices for cash crops is 0.6 yuan / cubic meter.

[0058] The basic water price is then calculated based on the crop planting type: Basic water price for grain crops = irrigation project operation and maintenance cost = 0.3 yuan / cubic meter, which does not exceed the user's affordability of 0.4 yuan / cubic meter; Basic water price for cash crops = permitted cost + reasonable profit = 0.3 yuan / cubic meter + 0.3 yuan / cubic meter × 8% = 0.324 yuan / cubic meter, which does not exceed the user's affordability of 0.6 yuan / cubic meter.

[0059] S2: Determination of water-saving linkage coefficient. The proportion of water saving in each pricing unit to the approved water consumption quota in the current period = 500,000 cubic meters ÷ 5,000,000 cubic meters = 10%. According to the value standard, the proportion of water saving is between 10% and 20%, and the linkage coefficient is taken as 0.85.

[0060] S3: Determination of Measurement Accuracy Correction Factor. All metering facilities in the experimental irrigation area are online monitoring devices, with measurement errors all ≤5%. Based on the established standards, the measurement accuracy correction factor is set to 1.0.

[0061] S4: Initial water price = base water price × water-saving linkage coefficient × metering accuracy correction coefficient, where the initial water price for grain crops = 0.3 yuan / cubic meter × 0.85 × 1.0 = 0.255 yuan / cubic meter; the initial water price for cash crops = 0.324 yuan / cubic meter × 0.85 × 1.0 = 0.2754 yuan / cubic meter. Since none of the pricing units exceeded their water quotas, there is no need to add progressive surcharges for exceeding quotas. Therefore, the final water prices are 0.255 yuan / cubic meter for grain crops and 0.2754 yuan / cubic meter for cash crops.

[0062] S5: Revenue Sharing and Feedback Adjustment: 15% of the water rights trading revenue is allocated as water price adjustment funds, with a total adjustment fund of 4 million yuan × 15% = 600,000 yuan. Each pricing unit has the same water-saving contribution (5%), and each pricing unit is allocated an adjustment quota of 600,000 yuan ÷ 20 = 30,000 yuan. Based on the adjustment quota, the base water price is lowered. After the reduction, the base water price for grain crops = 0.3 yuan / cubic meter - (30,000 yuan ÷ 5 million cubic meters) = 0.294 yuan / cubic meter, and the base water price for cash crops = 0.324 yuan / cubic meter - (30,000 yuan ÷ 5 million cubic meters) = 0.318 yuan / cubic meter, which will be used for the next cycle's water price calculation.

[0063] Upon entering the next cycle, dynamic adjustments and optimizations will be implemented. The current period is a normal year, with no abnormalities in water inflow, costs, or transaction activity. The dynamic adjustment cycle is set to one year as usual. In the next cycle, water price-related parameters will be further optimized based on the current base water price reduction, water inflow forecast data, and cost changes.

[0064] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A water pricing method for irrigation districts based on the linkage between metering accuracy correction and water saving, characterized in that: Includes the following steps: S1: Within a pricing cycle, the irrigation district is divided into several independent pricing units, basic data of each pricing unit is collected, and the basic water price of each pricing unit is calculated. S2: Determine the water-saving linkage coefficient based on the proportion of water-saving in the current period to the approved water consumption index for each pricing unit. The water-saving linkage coefficient is negatively correlated with the proportion of water-saving. S3: Measure the measurement error of the water metering facilities in each pricing unit, and determine the metering accuracy correction coefficient based on the measurement error. The metering accuracy correction coefficient is negatively correlated with the measurement error. S4: Calculate the initial water price for each pricing unit. Initial water price = base water price × water saving linkage coefficient × metering accuracy correction coefficient; combine the initial water price and water consumption to calculate the final water price for each pricing unit. S5: Enter the next pricing cycle and dynamically adjust the various factors affecting the final water price.

2. The irrigation district water pricing method based on metering accuracy correction and water saving linkage as described in claim 1, characterized in that: In S3, the measurement error is And set precise thresholds. and failure threshold ; when When the metering facility is in a precise state, no correction is made to the metering accuracy. when When the metering facility is deemed to be in a malfunctioning state, a rectification prompt for the metering facility is triggered. when When the measurement facility is in an error state, the measurement accuracy is corrected. The measurement error and the measurement accuracy correction coefficient are divided into multiple levels, with the measurement error level from low to high corresponding to the measurement accuracy correction coefficient level from high to low.

3. The irrigation district water pricing method based on metering accuracy correction and water saving linkage as described in claim 2, characterized in that: In S3, when the metering facility is in an error state, and the measurement error... Belongs to the first from low to high When in the first gear, the first The upper and lower limits of the measurement error for each gear are respectively and , No. The measurement accuracy correction factor corresponding to the measurement error of each gear is: Then the measurement accuracy correction factor Simultaneously satisfy and .

4. The irrigation district water pricing method based on metering accuracy correction and water saving linkage as described in claim 3, characterized in that: In S3, for the first For each measurement error level, there exists a correction balance value. satisfy And define the corrected equilibrium ratio. for: ； As the measurement error level increases, the balance correction rate increases. Gradually decreasing.

5. The irrigation district water price pricing method based on metering accuracy correction and water saving linkage as described in claim 4, characterized in that: In S5, after entering the next pricing cycle, the measurement error of the water metering facilities in each pricing unit is re-measured; within a continuous pricing cycle, if the metering facilities of a certain pricing unit are all in an error state, and the measurement error of that pricing unit has not decreased compared to the previous pricing cycle, then the metering accuracy correction coefficient of that pricing unit is increased based on the previous pricing cycle.

6. The irrigation district water pricing method based on metering accuracy correction and water saving linkage as described in claim 1, characterized in that: In S1, each pricing unit corresponds to a specific water user, water usage index, and metering node. The basic data collected includes irrigation project operation and maintenance costs, reasonable expected returns, crop planting types and areas, water usage metering data, water saving data, water resource inflow data, water rights trading data, and water user affordability data.

7. The irrigation district water pricing method based on metering accuracy correction and water saving linkage as described in claim 6, characterized in that: In S1, the base water price for each pricing unit is calculated based on the crop planting type.

8. The irrigation district water pricing method based on metering accuracy correction and water saving linkage as described in claim 1, characterized in that: In S2, the proportion of current water saving to the approved water use index is divided into multiple levels, and the water saving linkage coefficient is also divided into multiple levels. The water saving proportion level from high to low corresponds to the water saving linkage coefficient level from high to low.

9. The irrigation district water pricing method based on metering accuracy correction and water saving linkage as described in claim 1, characterized in that: In S4, a progressive pricing mechanism for exceeding the quota is established; when the water consumption of a pricing unit exceeds the approved water consumption target, a price increase is applied to the excess portion, and the final water price is calculated by combining the initial water price with the excess price increase.

10. The irrigation district water price pricing method based on metering accuracy correction and water saving linkage as described in claim 1, characterized in that: In S5, a water rights trading revenue sharing and feedback mechanism is established; a certain percentage of the water rights trading revenue is extracted as water price adjustment funds, and the adjustment amount is allocated according to the water saving contribution of each pricing unit; after entering the next pricing cycle, the base water price of the corresponding pricing unit is reduced according to the allocated adjustment amount.

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