Method and system for evaluating water-saving potential of irrigation area

Abstract

The invention provides a method and a system for evaluating the water-saving potential of an irrigation area. The method comprises the following steps: collecting basic information of the irrigation area; analyzing natural social characteristics of the irrigated area based on the basic information of the irrigated area; analyzing a crop water consumption process based on natural social characteristics of the irrigated area; hierarchically dividing the water-saving potential of the irrigation area based on the water consumption process of crops; and performing water-saving potential calculation on the division result of each layer. According to the three-level concept framework of the water-saving potential, the random change between the precipitation and the reference crop evapotranspiration is fully considered, and a new description basis for comprehensively considering the coupling variation condition of the precipitation and the reference crop evapotranspiration is provided for quantitative evaluation of the water-saving potential; powerful reference and technical support are provided for agricultural irrigation planning and management of the irrigated area, and the management work of the irrigated area can be more effectively carried out.

Description

Technical Field

[0001] The present invention relates to the technical field of water-saving analysis, and in particular to a method and system for evaluating water-saving potential in irrigation areas. Background Art

[0002] With the rapid development of agriculture and the national economy, and the gradual implementation of water quotas in river basins, the contradiction between water supply and demand in irrigation areas has become increasingly prominent. In order to alleviate this contradiction and improve the efficiency of water resource utilization, it is particularly necessary to conduct water-saving potential assessment in irrigation areas.

[0003] At present, although some progress has been made in water conservation work in irrigation areas, there are still problems such as weak water conservation awareness, extensive management, imperfect systems, and inadequate policies. Through water conservation potential assessment, the shortcomings and deficiencies in water conservation work can be identified, providing a scientific basis for improving management and enhancing water conservation awareness. However, existing water conservation potential assessment methods often fail to fully describe the interaction between crops and precipitation, resulting in large discrepancies between assessment results and reality, which hinders agricultural management in irrigation areas. Summary of the invention

[0004] In view of this, the present invention proposes a method and system for evaluating the water-saving potential of an irrigation area to solve the problems existing in the above-mentioned prior art.

[0005] On the one hand, to achieve the above-mentioned purpose, the present invention proposes a method for evaluating the water-saving potential of an irrigation area, comprising:

[0006] Basic information of irrigation area;

[0007] Analyze the natural and social characteristics of the irrigation area based on the basic information of the irrigation area;

[0008] Analyze the process of crop water consumption based on the natural and social characteristics of the irrigation area;

[0009] Based on the crop water consumption process, the water-saving potential of the irrigation area is divided into different levels;

[0010] The water-saving potential is calculated for each layer of division results.

[0011] Optionally, the basic information of the irrigation area includes the topography of the irrigation area, climate characteristics, soil type, crop type, water resource content, irrigation conditions, irrigation area planning and irrigation indicators.

[0012] Optionally, in the process of dividing the irrigation area water-saving potential into levels based on the crop water consumption process, the irrigation area water-saving potential is divided into a first level, a second level, and a third level;

[0013] The first level directly reduces water loss during irrigation area water use through water-saving technical engineering measures, thereby reducing direct water consumption;

[0014] The second level reduces the total demand for water resources in the irrigation area by improving water production efficiency;

[0015] The third level reduces the amount of irrigation water by structurally changing the types of water-demanding crops on the water-demand side.

[0016] Optionally, the calculation method of the first level of water saving potential is as follows:

[0017]

[0018] Among them, W SP1 is the first level of water-saving potential, the basic water requirement of the i-th crop in each irrigation area is W RBi The current irrigation water consumption T is determined by referring to the crop evapotranspiration ET0 method. QT , the current number of planting structures in the irrigation area n, the effective precipitation in the irrigation area P Ei And irrigation area planting area A i Determined through analysis of survey data.

[0019] Optionally, the second-level water-saving potential calculation method is as follows:

[0020]

[0021] Where W SP2 The second level of water saving potential, W RBi is the basic water consumption of the i-th crop; Y DPi is the current average yield of the i-th crop, obtained through current survey data; Y DTi is the potential yield value of the i-th crop, obtained through survey and research data or calculated through the light and temperature potential production value formula; p is the maximum proportion of inter-plant evaporation loss reduced by measures such as film covering and straw covering in the basic water consumption; A i is the current planting area of ​​the i-th crop, which is determined through the current survey data.

[0022] Optionally, the third level water-saving potential calculation method is implemented by adjusting the crop types and planting areas in the first level water-saving potential calculation method, specifically by adjusting W RBI , n and Ai's values.

[0023] On the other hand, to achieve the above-mentioned purpose, the present invention proposes an evaluation system for water-saving potential in irrigation areas, comprising an information collection module, a hierarchical division module, and a water-saving potential calculation module connected in sequence;

[0024] The information collection module is used to collect basic information of the irrigation area;

[0025] The hierarchical division module is used to perform hierarchical division of irrigation area water-saving potential according to the basic information of the irrigation area;

[0026] The water-saving potential calculation module is used to calculate the water-saving potential of each layer of division results.

[0027] Optionally, the basic information of the irrigation area collected by the information collection module includes the topography, climate characteristics, soil type, crop type, water resource content, irrigation conditions, irrigation area planning and irrigation indicators of the irrigation area.

[0028] Optionally, the hierarchical division module analyzes the natural and social characteristics of the irrigation area according to the basic information of the irrigation area; and analyzes the water consumption process of crops according to the natural and social characteristics of the irrigation area; and divides the water-saving potential of the irrigation area into a first level, a second level, and a third level according to the water consumption process of crops;

[0029] The first level directly reduces water loss during irrigation area water use through water-saving technical engineering measures, thereby reducing direct water consumption;

[0030] The second level reduces the total demand for water resources in the irrigation area by improving water production efficiency;

[0031] The third level reduces the amount of irrigation water by structurally changing the types of water-demanding crops on the water-demand side.

[0032] Optionally, the water-saving potential calculation module calculates the first level of water-saving potential based on the current irrigation water consumption, the current number of planting structures in the irrigation area, the effective precipitation in the irrigation area, and the planting area in the irrigation area; calculates the second level of water-saving potential based on the basic water consumption of crops in the irrigation area, the current average yield of crops in the irrigation area, the potential yield value of crops in the irrigation area, the maximum proportion of plant evaporation losses in the basic water consumption that can be reduced through measures such as film covering and straw covering, and the crop planting area; and calculates the third level of water-saving potential by adjusting the crop types and planting areas in the first level of water-saving potential.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] The present invention follows the three-level conceptual framework of water-saving potential, fully considers the random variations between precipitation and reference crop evapotranspiration, and provides a new descriptive benchmark for the quantitative evaluation of water-saving potential by comprehensively considering the coupled variation of precipitation and reference crop evapotranspiration. It provides a powerful reference and technical support for agricultural irrigation planning and management in irrigation areas, and facilitates more effective irrigation area management. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0036] Figure 1 is a flow chart of a method for evaluating water-saving potential in an irrigation area in an embodiment of the present invention;

[0037] Figure 2 This is an architecture diagram of an irrigation area water-saving potential assessment system in an embodiment of the present invention. DETAILED DESCRIPTION

[0038] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to be able to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0039] Embodiment 1

[0040] This embodiment proposes a method for evaluating the water-saving potential of an irrigation area. Figure 1 As shown, including:

[0041] Collect basic information of irrigation districts;

[0042] Analyze the natural and social characteristics of the irrigation area based on the basic information of the irrigation area;

[0043] Analyze the process of crop water consumption based on the natural and social characteristics of the irrigation area;

[0044] Based on the crop water consumption process, the water-saving potential of the irrigation area is divided into different levels;

[0045] The water-saving potential is calculated for each layer of division results.

[0046] As a preferred embodiment, the evaluation principle for the water-saving potential of the irrigation area includes the following aspects:

[0047] (1) Highlight the role of water resources in constraining and protecting. The Haihe River Basin is short of water resources. The development of agricultural irrigation should take water resources into consideration as the primary influencing factor. It is clear that “water determines demand and water determines land”, and the red line of water resource development and utilization should be placed before the development of irrigation (water-saving irrigation) area. At the same time, for the relevant planning of water resource development, utilization and allocation in the basin, full consideration should be given to the impact of the new water resource allocation pattern in the basin formed by water diversion outside the basin such as the South-to-North Water Diversion Project and the Yellow River Diversion Project, as well as groundwater pressure extraction, on water conservation in the irrigation area.

[0048] (2) Reflect the constraints of natural, social and economic conditions on the development of water-saving irrigation. While considering the different conditions, approaches and needs of developing agricultural water-saving irrigation in different regions, we should also pay attention to the different needs of different administrative regions (economic zones) in the same water-saving region for water-saving irrigation measures due to differences in economic foundation, social needs and water-saving irrigation project foundation. Achieving coordination among these is the basis for carrying out water-saving potential assessment.

[0049] (3) Reflect the leading role of different levels of goals in the assessment of water-saving potential. The concept and connotation of agricultural water conservation are very rich, with different means of implementation and influencing factors. The water-saving potential under different conceptual definitions should reflect the level of concepts and connotations, so as to achieve a hierarchical evaluation of water-saving potential.

[0050] (4) Reflect the comprehensive impact of the main influencing factors on the water-saving potential value. The main factors affecting the theoretical water demand and actual water demand of crops are precipitation and reference crop evapotranspiration. These two factors are random variables with natural correlation. On the basis of the traditional irrigation area water-saving potential evaluation work, it is necessary to comprehensively consider the coupling effect of the two and extend the standard of irrigation area water-saving potential evaluation work from a single consideration of different frequencies of precipitation to a new evaluation benchmark that simultaneously considers different frequencies of precipitation and reference crop evapotranspiration.

[0051] The so-called potential is the difference between the current value and the expected value. After comprehensive analysis, it is believed that the water-saving potential of the irrigation area can be defined as: the amount of water that can be reduced from the existing irrigation water volume through the implementation of various water-saving measures while ensuring food security and economic benefits. According to this definition, the water-saving potential of the irrigation area consists of three parts, namely, the water-saving amount in the process of water transmission and distribution, the water-saving amount in the process of crop absorption and utilization, and the water-saving amount in the crop planting structure, which can be called the water-saving potential at the first level, the second level, and the third level respectively. The evaluation work adopts a working approach that combines empirical research with theoretical analysis. Through information collection, literature research, data analysis and indicator calculation, under the constraints of total water withdrawal control and water use efficiency indicators, the water-saving potential assessment and possible water-saving measures are closely combined. On the basis of analyzing the actual current agricultural irrigation water consumption, starting from the definition of water-saving potential, the crop water requirement and crop water use efficiency are analyzed, and the water-saving amounts at different stages on the first, second and third levels under the framework of different frequency combinations of crop water requirement and precipitation are calculated, and a scientific, reasonable and practical water-saving value system for irrigation areas is proposed.

[0052] Based on the in-depth analysis of the water consumption process of crops, the water-saving potential of irrigation areas can be divided into the following three levels:

[0053] ① Through certain water-saving technical engineering measures, water losses in the water use process are directly reduced, thereby reducing the direct consumption of water resources. This is called the first level of water conservation; ② On the basis of the first level of water conservation, other water-saving measures are applied to improve the conversion efficiency of crops in converting environmental factors into grain dry matter, so that the amount of dry matter produced per unit of water use is significantly increased, that is, the total demand for water resources is reduced by improving water production efficiency. This is called the second level of water conservation; ③ On the basis of the first level of water conservation, while ensuring food security and farmers’ income, the crop planting structure is changed to reduce irrigation water through structural changes in the types of water-demanding crops on the water-demand side. This is called the third level of water conservation.

[0054] The first level of water conservation is mainly to reduce irrigation water use. The water conservation potential also mainly or entirely comes from irrigation water. The amount of water that needs to be supplemented through irrigation during crop production is the irrigation water demand.

[0055] In order to facilitate the discussion of water-saving potential and to connect the first, second and third levels of water-saving, the concept of basic water consumption is introduced. Basic water consumption can be expressed as "the actual amount of water required to meet crop yield and normal growth needs under the conditions of no groundwater recharge, no salinity damage, no pest damage, and sufficient fertilizer supply." The basic water consumption is based on the balance analysis of water supply and demand in the irrigation area from the perspective of meeting production goals. Generally speaking, the water demand and basic water consumption have the following relationship:

[0056] W RI =W RB -P E

[0057] Where W RI is the irrigation water requirement; W RB is the basic water consumption; E is the effective precipitation.

[0058] The first level of water saving potential can be expressed as:

[0059] W SP1 =T QT -W RI

[0060] Where W SP1 The first level of water saving potential; T QT It is the current irrigation water consumption; the meanings of other symbols are the same as above.

[0061] The current irrigation water consumption can be determined through literature research and field investigation, and can be regarded as a known number. Therefore, the problem of determining the first-level water-saving potential is transformed into the problem of determining the basic water consumption of the irrigation area and the irrigation water demand. Considering the purpose of irrigation, it can be considered that when taking various engineering measures to tap the first-level water-saving potential, the total water consumption of the irrigation area should not be lower than the basic water consumption, that is, the irrigation water demand should be fully met by engineering measures. The dominant factor that determines the basic water consumption is the water demand characteristics and production goals of crops with a certain planting structure, and the amount of water that needs to be supplemented through irrigation is mainly affected by the basic water consumption of crops and effective precipitation. Therefore, the first-level water-saving potential is the amount of water that can be directly reduced from the total existing irrigation water consumption by implementing various water-saving technical measures under the condition of meeting the basic water consumption of crops.

[0062] The second level of water saving potential is mainly achieved by improving crop water use efficiency. Crop water use efficiency can be expressed as the amount of dry matter produced per unit of water use, that is:

[0063] W UE =Y D / W U

[0064] Then we have:

[0065] W U =Y D / W UE

[0066] Where W UE Y is crop water use efficiency; D is the amount of crop dry matter (kg); WU is the water consumption (m 3 ).

[0067] From formula (4), it can be seen that water consumption is proportional to yield and inversely proportional to water use efficiency. Therefore, improving crop water use efficiency has a significant effect in reducing water consumption. In view of the practical effects of different measures, when conducting the second-level water-saving potential evaluation, Y D In this sense, the second level of water-saving potential is the value of the basic water consumption that can be reduced by relying on agronomic water-saving technical measures while ensuring that the total amount of dry matter on the existing irrigation area remains unchanged.

[0068] The third level of water-saving potential is based on the analysis of the first and second levels of water-saving potential. It is the crop planting structure with the minimum water demand determined in accordance with the principles of market economy, while ensuring food security and not reducing farmers' income. Its essence is the first level of water-saving potential achieved through the adjustment of the combination of different crop types. It is an optimized combination of the first level of water-saving potential.

[0069] In summary, the calculation formula for the first level of water saving potential is:

[0070]

[0071] Among them, the basic water requirement of the i-th crop in each irrigation area is W RBi (mm) can be determined by referring to the crop evapotranspiration ET0 method, the current irrigation water consumption T QT (m 3 ), the number of current planting structures in the sub-region n, the effective precipitation in the sub-region P Ei (mm) and its planting area A i (m 2 ) is determined through analysis of survey data.

[0072] The second level water saving potential calculation formula is:

[0073]

[0074] Where W RBi is the basic water consumption of the i-th crop (m 3 );Y DPi is the current average yield of the i-th crop (kg / m 2 ), which can be obtained through current situation survey data; Y DTi is the potential yield value of the i-th crop (kg / m 2), which can be obtained by investigating the research data of the agricultural department or calculated and determined by the light-temperature potential production value formula; p is the maximum proportion of the evaporation loss between plants that can be reduced by measures such as film covering and straw covering in the basic water consumption; A i is the current planting area of ​​the i-th crop (m 2 ), which can be determined through current situation survey data.

[0075] The calculation of the third level of water-saving potential can be achieved by changing the crop types and planting areas in the first level of water-saving potential calculation method. Specifically, by adjusting W RBI , n and A i value to carry out.

[0076] Under different precipitation frequency conditions, the effective precipitation that can be used by the same crop is different. Therefore, under different precipitation frequency conditions, the irrigation water demand of the same crop is also different, and the corresponding water-saving potential is also different. As another aspect of the same problem, under the same precipitation frequency, the reference crop evapotranspiration, which is the basic reference value for calculating crop water demand, is also different, that is, under the same precipitation frequency, under the assumption that the effective precipitation utilization value is the same, the water demand of the same crop is also different. Therefore, it is necessary to consider the random variation between precipitation and reference crop evapotranspiration at the same time, and provide a new descriptive benchmark for the quantitative evaluation of water-saving potential that comprehensively considers the coupled variation of precipitation and reference crop evapotranspiration, which is the connotation of the different frequency combinations proposed in this embodiment.

[0077] The total amount control indicators and water use efficiency control indicators for water resources development and utilization determined by the most stringent water resources management system are binding and guiding for the development of water-saving irrigation in various irrigation areas. The evaluation of water-saving potential in irrigation areas should calculate the potential value under the constraints of total amount and efficiency indicators.

[0078] To sum up, the content of this embodiment is mainly to calculate the water-saving potential of the first, second and third levels on the basis of clarifying the total amount control and irrigation water utilization coefficient control indicators of the planning level year, and then propose a planning level year water-saving value system for each irrigation area under the framework of evaluation factors such as different frequency combinations and different water-saving potential levels.

[0079] In addition, this embodiment also provides a system for applying the above irrigation area water-saving potential assessment method, such as Figure 2 As shown, it includes an information collection module, a level division module, and a water-saving potential calculation module connected in sequence;

[0080] The information collection module is used to collect basic information of the irrigation area;

[0081] The hierarchical division module is used to perform hierarchical division of irrigation area water-saving potential according to the basic information of the irrigation area;

[0082] The water-saving potential calculation module is used to calculate the water-saving potential of each layer of division results.

[0083] As a preferred embodiment, the basic information of the irrigation area collected by the information collection module includes the topography, climate characteristics, soil type, crop type, water resource content, irrigation conditions, irrigation area planning and irrigation indicators of the irrigation area.

[0084] As a preferred embodiment, the hierarchical division module analyzes the natural and social characteristics of the irrigation area according to the basic information of the irrigation area; and analyzes the water consumption process of crops according to the natural and social characteristics of the irrigation area; and divides the water-saving potential of the irrigation area into the first level, the second level, and the third level according to the water consumption process of crops;

[0085] The first level directly reduces water loss during irrigation area water use through water-saving technical engineering measures, thereby reducing direct water consumption;

[0086] The second level reduces the total demand for water resources in the irrigation area by improving water production efficiency;

[0087] The third level reduces the amount of irrigation water by structurally changing the types of water-demanding crops on the water-demand side.

[0088] As a preferred embodiment, the water-saving potential calculation module calculates the first-level water-saving potential based on the current irrigation water consumption, the current number of planting structures in the irrigation area, the effective precipitation in the irrigation area, and the planting area in the irrigation area; calculates the second-level water-saving potential based on the basic water consumption of crops in the irrigation area, the current average yield of crops in the irrigation area, the potential yield value of crops in the irrigation area, the maximum proportion of plant evaporation losses reduced by measures such as film covering and straw covering in the basic water consumption, and the crop planting area; and calculates the third-level water-saving potential by adjusting the crop types and planting areas in the first-level water-saving potential.

[0089] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-described embodiments, those skilled in the art should understand that any person skilled in the art can still modify the technical solutions described in the above-described embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or perform equivalent replacements on some of the technical features thereof; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. They should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method for evaluating water-saving potential in irrigation areas, characterized in that: The following steps are involved: Collect basic information of irrigation districts; Analyze the natural and social characteristics of the irrigation area based on the basic information of the irrigation area; Analyze the process of crop water consumption based on the natural and social characteristics of the irrigation area; Based on the crop water consumption process, the water-saving potential of the irrigation area is divided into different levels; The water-saving potential is calculated for each layer of division results.

2. The method for evaluating water-saving potential in irrigation areas according to claim 1, characterized in that: The basic information of the irrigation area includes the topography and landforms of the irrigation area, climate characteristics, soil type, crop type, water resource content, irrigation conditions, irrigation area planning and irrigation indicators.

3. The method for evaluating water-saving potential in irrigation areas according to claim 1, characterized in that: In the process of dividing the water-saving potential of the irrigation area into levels based on the water consumption process of the crops, the water-saving potential of the irrigation area is divided into a first level, a second level, and a third level; The first level directly reduces water loss during irrigation area water use through water-saving technical engineering measures, thereby reducing direct water consumption; The second level reduces the total demand for water resources in the irrigation area by improving water production efficiency; The third level reduces the amount of irrigation water by structurally changing the types of water-demanding crops on the water-demand side.

4. The method for evaluating water-saving potential in irrigation areas according to claim 3, characterized in that: The calculation method of the first level of water saving potential is as follows: Among them, W SP1 is the first level of water-saving potential, the basic water requirement of the i-th crop in each irrigation area is W RBi The current irrigation water consumption T is determined by referring to the crop evapotranspiration ET0 method. QT , the current number of planting structures in the irrigation area n, the effective precipitation in the irrigation area P Ei And irrigation area planting area A i Determined through analysis of survey data.

5. The method for evaluating water-saving potential in irrigation areas according to claim 3, characterized in that: The calculation method of the second level of water saving potential is as follows: Where W SP2 The second level of water saving potential, W RBi is the basic water consumption of the i-th crop; Y DPi is the current average yield of the i-th crop, obtained through current survey data; Y DTi is the potential yield value of the i-th crop, obtained through survey and research data or calculated through the light and temperature potential production value formula; p is the maximum proportion of inter-plant evaporation loss reduced by measures such as film covering and straw covering in the basic water consumption; A i is the current planting area of ​​the i-th crop, which is determined through the current survey data.

6. The method for evaluating water-saving potential in irrigation areas according to claim 3, characterized in that: The third level of water-saving potential calculation method is achieved by adjusting the crop types and planting areas in the first level of water-saving potential calculation method, specifically by adjusting W RBI , n and A i value to be used.

7. A system for evaluating water-saving potential in irrigation areas, characterized in that: It includes an information collection module, a level division module, and a water-saving potential calculation module which are connected in sequence; The information collection module is used to collect basic information of the irrigation area; The hierarchical division module is used to perform hierarchical division of irrigation area water-saving potential according to the basic information of the irrigation area; The water-saving potential calculation module is used to calculate the water-saving potential of each layer of division results.

8. The system for evaluating water-saving potential in irrigation areas according to claim 7, characterized in that: The basic information of the irrigation area collected by the information collection module includes the topography, climate characteristics, soil type, crop type, water resource content, irrigation conditions, irrigation area planning and irrigation indicators of the irrigation area.

9. The system for evaluating water-saving potential in irrigation areas according to claim 7, characterized in that: The hierarchical division module analyzes the natural and social characteristics of the irrigation area according to the basic information of the irrigation area; analyzes the water consumption process of crops according to the natural and social characteristics of the irrigation area; and divides the water-saving potential of the irrigation area into the first level, the second level, and the third level according to the water consumption process of crops; The first level directly reduces water loss during irrigation area water use through water-saving technical engineering measures, thereby reducing direct water consumption; The second level reduces the total demand for water resources in the irrigation area by improving water production efficiency; The third level reduces the amount of irrigation water by structurally changing the types of water-demanding crops on the water-demand side.

10. The system for evaluating water-saving potential in irrigation areas according to claim 9, characterized in that: The water-saving potential calculation module calculates the first-level water-saving potential according to the current irrigation water consumption, the current number of planting structures in the irrigation area, the effective precipitation in the irrigation area, and the planting area in the irrigation area; calculates the second-level water-saving potential according to the basic water consumption of crops in the irrigation area, the current average yield of crops in the irrigation area, the potential yield value of crops in the irrigation area, the maximum proportion of inter-plant evaporation losses in the basic water consumption that can be reduced through measures such as film covering and straw covering, and the crop planting area; and calculates the third-level water-saving potential by adjusting the crop types and planting areas in the first-level water-saving potential.

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