Rice irrigation area irrigation amount simulation method and system

Abstract

The invention discloses a rice irrigation district irrigation amount simulation method and system, and the method comprises the steps: taking a region controlled by a backbone channel and a drainage main ditch as a standard for dividing sub-units based on a DEM and a digital canal system, carrying out the grid division of the sub-units, and obtaining an irrigation district sub-basin division result; constructing a dynamic irrigation triggering mechanism of each irrigation area sub-basin, and determining a multi-water-source cooperative scheduling scheme of each irrigation area sub-basin based on the division result of the irrigation area sub-basin; and when each irrigation sub-basin is irrigated according to the multi-water-source cooperative scheduling scheme, calculating the canal system leakage amount in each irrigation sub-basin, and determining a water distribution scheme of each irrigation sub-basin according to the canal system leakage amount. The method can be used for quickly and accurately simulating the irrigation amount and the runoff volume of the rice irrigation area, and provides a scientific basis for formulating agricultural management measures and screening water-saving high-yield technical modes.

Description

Technical Field

[0001] This invention belongs to the field of rice irrigation area management technology, and in particular relates to a method and system for simulating irrigation volume in rice irrigation areas. Background Technology

[0002] Rice is a crucial irrigated crop in my country, playing a vital role in the country's food and water security. Rice production accounts for 37.1% of my country's total grain output, making it a primary staple food. Its stable and high yields are essential for ensuring my country's food supply, stabilizing food prices, and meeting the basic needs of the people. Furthermore, rice cultivation covers a large proportion of my country's grain crops, reaching 442 million mu (approximately 36.8 million hectares) in 2022. This widespread rice cultivation provides a significant portion of my country's grain output, becoming a crucial pillar of food security. Irrigation water consumption for rice accounts for a high percentage of agricultural water use in my country. 85% of the country's paddy fields are located in the south, where rice irrigation accounts for over 90% of total irrigation water consumption. In some regions, such as the Huai River basin, farmland irrigation water consumption accounts for 63.4% of total water use, with rice irrigation water being a significant component.

[0003] Rice cultivation places high demands on water resource allocation. my country's water resources are unevenly distributed, with rice-growing areas often concentrated in relatively water-rich regions. However, with the influence of population growth, economic development, and climate change, the contradiction between water supply and demand is becoming increasingly prominent. Rational allocation of water resources and ensuring irrigation water for rice are crucial for maintaining regional water security and ecological balance. Hydrological models, as important scientific tools for water resource management and water conservation and emission reduction research, play an irreplaceable role in water resource regulation at the watershed scale. However, the hydrological system of rice irrigation areas exhibits highly nonlinear characteristics, and its water cycle is influenced by multiple factors. This complexity leads to poor performance of hydrological models developed for natural watersheds when applied to simulating irrigation volume and hydrological processes in rice irrigation areas, posing a challenge to the accurate assessment of water-saving effects in rice irrigation areas. Therefore, developing a simulation system suitable for irrigation volume and hydrological processes in rice irrigation areas is an urgent problem to be solved. Summary of the Invention

[0004] This invention provides a method and system for simulating irrigation volume in rice irrigation areas, which is used to solve at least one of the above-mentioned technical problems.

[0005] In a first aspect, the present invention provides a method for simulating irrigation volume in rice irrigation areas, comprising: Based on DEM and digital canal system, the area controlled by backbone canals and drainage ditches is used as the standard for dividing sub-units. The sub-units are then gridded to obtain the sub-basin division results of the irrigation area. A dynamic irrigation triggering mechanism is constructed for each irrigation district sub-basin, and based on the division results of the irrigation district sub-basins, a multi-water source collaborative scheduling scheme for each irrigation district sub-basin is determined. When irrigating each irrigation sub-basin according to the multi-water source coordinated scheduling scheme, the canal system leakage in each irrigation sub-basin is calculated, and the water allocation scheme for each irrigation sub-basin is determined based on the canal system leakage.

[0006] Secondly, the present invention provides a rice irrigation area irrigation volume simulation system, comprising: The subdivision module is configured to be based on DEM and digital canal system, using the area controlled by backbone canals and drainage ditches as the standard for dividing sub-units, and performing grid division on sub-units to obtain the sub-basin division results of irrigation district; The module is configured to construct a dynamic irrigation triggering mechanism for each irrigation district sub-basin, and based on the division results of the irrigation district sub-basins, determine a multi-water source collaborative scheduling scheme for each irrigation district sub-basin. The calculation module is configured to calculate the canal leakage in each irrigation sub-basin when irrigating each irrigation sub-basin according to the multi-water source coordinated scheduling scheme, and to determine the water allocation scheme for each irrigation sub-basin based on the canal leakage.

[0007] Thirdly, an electronic device is provided, comprising: at least one processor, and a memory communicatively connected to the at least one processor, wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to perform the steps of the rice irrigation volume simulation method according to any embodiment of the present invention.

[0008] Fourthly, the present invention also provides a computer-readable storage medium having a computer program stored thereon, wherein when the program instructions are executed by a processor, the processor performs the steps of the rice irrigation area irrigation volume simulation method according to any embodiment of the present invention.

[0009] This application presents a method and system for simulating irrigation volume in rice irrigation areas. Based on DEM and digital canal systems, it uses the areas controlled by backbone canals and drainage ditches as the standard for dividing sub-units, and performs grid division on the sub-units to obtain the sub-basin division results of the irrigation area. It constructs a dynamic irrigation triggering mechanism for each sub-basin and, based on the sub-basin division results, determines a multi-source coordinated scheduling scheme for each sub-basin. When irrigating each sub-basin according to the multi-source coordinated scheduling scheme, it calculates the canal system leakage within each sub-basin and determines the water allocation scheme for each sub-basin based on the canal system leakage. This method can quickly and accurately simulate irrigation volume and runoff in rice irrigation areas, providing a scientific basis for the formulation of agricultural management measures and the selection of water-saving and high-yield technology models. Attached Figure Description

[0010] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 A flowchart illustrating a method for simulating irrigation volume in a rice irrigation area, as provided in an embodiment of the present invention; Figure 2 This is a structural block diagram of a rice irrigation area irrigation volume simulation system provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0013] Please see Figure 1 The diagram shows a flowchart of a method for simulating irrigation volume in a rice irrigation area according to this application.

[0014] like Figure 1 As shown, the method for simulating irrigation volume in rice irrigation areas specifically includes the following steps: Step S101: Based on DEM and digital canal system, the area controlled by backbone canals and drainage ditches is used as the standard for dividing sub-units. The sub-units are then divided into grids to obtain the irrigation district sub-basin division results.

[0015] In this step, based on the overlay of the DEM and the digital canal system, the areas controlled by the backbone canals and drainage ditches are used as the criteria for dividing sub-units, and the sub-units are then meshed. For artificial water conveyance and distribution channels, the DEM is processed using the principle of elevation incremental overlay algorithm. According to the spatial distribution of natural rivers and artificial drainage ditch networks in the study area, the "burn-in" algorithm is used to concaveize the DEM to reflect the actual layout of artificial canals, ditches, and river networks within the irrigation area.

[0016] Step S102: Construct a dynamic irrigation triggering mechanism for each irrigation district sub-basin, and determine a multi-water source collaborative scheduling scheme for each irrigation district sub-basin based on the division results of the irrigation district sub-basins.

[0017] In this step, the expression for the dynamic irrigation triggering mechanism is: , , , In the formula, This refers to the lower limit of the water layer depth for paddy field irrigation. The lower limit of irrigation water for paddy fields is defined as the percentage of soil saturation moisture content. This represents the soil saturation water content. For irrigation volume, This is the upper limit of the water layer depth for irrigation. This represents the current soil moisture content.

[0018] The expression for the multi-source coordinated scheduling scheme is: , , , In the formula, This represents the actual amount of water injected from external water sources. The water demand for irrigation from external water sources in the sub-basins of the irrigation district. The amount of water available for irrigation from external water sources entering the sub-basin of the irrigation district. This refers to the percentage of external water sources that can be used for irrigation out of the total water volume. This refers to the total amount of water entering the sub-basin of the irrigation area from external water sources.

[0019] Step S103: When irrigating each irrigation sub-basin according to the multi-water source coordinated scheduling scheme, calculate the canal system leakage in each irrigation sub-basin, and determine the water allocation scheme for each irrigation sub-basin based on the canal system leakage.

[0020] In this step, the expression for calculating the leakage of the canal system is: , , In the formula, This refers to the leakage rate of the canal system. For the gross irrigation water volume of the irrigated sub-basin, The water utilization coefficient of the water conveyance canal system. The water utilization coefficient of the water distribution canal system Area threshold The area of ​​the irrigated sub-basin.

[0021] It should be noted that determining the water allocation scheme for each irrigation sub-basin based on the canal system leakage includes: Obtain the gross irrigation water volume for each irrigation sub-basin; Determine the canal system type based on the area threshold A: When the irrigated sub-basin area When the area threshold A is greater than the area threshold A, the leakage of the canal system is calculated based on the water utilization coefficient of the water conveyance canal system and the water utilization coefficient of the water distribution canal system. When the irrigated sub-basin area When the area threshold A is not greater than the area threshold A, the leakage of the water distribution canal system is calculated only based on the water utilization coefficient of the water distribution canal system. The calculated canal leakage is subtracted from the gross irrigation water volume to obtain the net irrigation water volume. ,in, This refers to the leakage rate of the canal system. Gross irrigation water volume for irrigating sub-basins; Based on the net irrigation water volume of each irrigation sub-basin The actual irrigation water allocation for each irrigation sub-basin is dynamically adjusted based on crop water requirements and soil moisture content.

[0022] Furthermore, based on the net irrigation water volume of each irrigation sub-basin The actual irrigation water allocation for each irrigation sub-basin is dynamically adjusted based on crop water requirements and soil moisture content, including: Obtain basic hydrological parameters and real-time soil moisture content (vol) for each irrigation sub-basin; When the soil moisture content is lower than the lower limit water layer depth for paddy field irrigation, the actual irrigation water volume is dynamically allocated according to a preset allocation rule to obtain the current soil moisture content. The allocation rule is as follows: Based on the net irrigation water volume and the preset crop growth stage adjustment coefficient Calculate the actual water allocation Among them, during the greening period, the crop growth stage adjustment coefficient =1.2, Tillering stage, crop growth stage adjustment coefficient =1.0, Adjustment coefficient for crop growth stage during the booting stage. =1.1, maturity period, crop growth stage adjustment coefficient =0.8; Current soil moisture content = Soil moisture content at the previous moment + - Crop evapotranspiration.

[0023] In summary, the method of this application, Please see Figure 2 The diagram shows a structural block diagram of a rice irrigation area irrigation volume simulation system according to this application.

[0024] like Figure 2As shown, the rice irrigation area irrigation volume simulation system 200 includes a division module 210, a determination module 220, and a calculation module 230.

[0025] The partitioning module 210 is configured to perform grid partitioning on the sub-units based on DEM and digital canal system, using the areas controlled by backbone canals and drainage ditches as the standard for partitioning sub-units, to obtain the irrigation district sub-basin partitioning results; the determination module 220 is configured to construct a dynamic irrigation triggering mechanism for each irrigation district sub-basin, and determine a multi-water source coordinated scheduling scheme for each irrigation district sub-basin based on the irrigation district sub-basin partitioning results; the calculation module 230 is configured to calculate the canal system leakage in each irrigation sub-basin when irrigating each irrigation sub-basin according to the multi-water source coordinated scheduling scheme, and determine the water allocation scheme for each irrigation sub-basin based on the canal system leakage.

[0026] It should be understood that Figure 2 The modules and references described in the document Figure 1 The steps described in the text correspond to those in the method described above. Therefore, the operations, features, and corresponding technical effects described above also apply to the method described in the text. Figure 2 The various modules in the document will not be described in detail here.

[0027] In other embodiments, the present invention also provides a computer-readable storage medium having a computer program stored thereon, wherein when the program instructions are executed by a processor, the processor performs the rice irrigation water volume simulation method in any of the above method embodiments. In one embodiment, the computer-readable storage medium of the present invention stores computer-executable instructions, which are configured as follows: Based on DEM and digital canal system, the area controlled by backbone canals and drainage ditches is used as the standard for dividing sub-units. The sub-units are then gridded to obtain the sub-basin division results of the irrigation area. A dynamic irrigation triggering mechanism is constructed for each irrigation district sub-basin, and based on the division results of the irrigation district sub-basins, a multi-water source collaborative scheduling scheme for each irrigation district sub-basin is determined. When irrigating each irrigation sub-basin according to the multi-water source coordinated scheduling scheme, the canal system leakage in each irrigation sub-basin is calculated, and the water allocation scheme for each irrigation sub-basin is determined based on the canal system leakage.

[0028] Computer-readable storage media may include a stored program area and a stored data area, wherein the stored program area may store an operating system and an application program required for at least one function; the stored data area may store data created based on the use of the rice irrigation district irrigation volume simulation system, etc. Furthermore, the computer-readable storage medium may include high-speed random access memory, and may also include memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, the computer-readable storage medium may optionally include memory remotely configured relative to a processor, which can be connected to the rice irrigation district irrigation volume simulation system via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0029] Figure 3 This is a schematic diagram of the structure of the electronic device provided in the embodiment of the present invention, such as... Figure 3 As shown, the device includes a processor 310 and a memory 320. The electronic device may also include an input device 330 and an output device 340. The processor 310, memory 320, input device 330, and output device 340 can be connected via a bus or other means. Figure 3 Taking a bus connection as an example, the memory 320 is the computer-readable storage medium described above. The processor 310 executes various server functions and data processing by running non-volatile software programs, instructions, and modules stored in the memory 320, thereby implementing the rice irrigation area water volume simulation method described in the above embodiment. The input device 330 can receive input digital or character information and generate key signal inputs related to user settings and function control of the rice irrigation area water volume simulation system. The output device 340 may include a display screen or other display device.

[0030] The aforementioned electronic device can execute the method provided in the embodiments of the present invention, and has the corresponding functional modules and beneficial effects for executing the method. Technical details not described in detail in this embodiment can be found in the method provided in the embodiments of the present invention.

[0031] In one implementation, the above-described electronic device is applied to a rice irrigation area irrigation volume simulation system for a client, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to: Based on DEM and digital canal system, the area controlled by backbone canals and drainage ditches is used as the standard for dividing sub-units. The sub-units are then gridded to obtain the sub-basin division results of the irrigation area. A dynamic irrigation triggering mechanism is constructed for each irrigation district sub-basin, and based on the division results of the irrigation district sub-basins, a multi-water source collaborative scheduling scheme for each irrigation district sub-basin is determined. When irrigating each irrigation sub-basin according to the multi-water source coordinated scheduling scheme, the canal system leakage in each irrigation sub-basin is calculated, and the water allocation scheme for each irrigation sub-basin is determined based on the canal system leakage.

[0032] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods of various embodiments or some parts of embodiments.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for simulating irrigation volume in rice irrigation areas, characterized in that, include: Based on DEM and digital canal system, the area controlled by backbone canals and drainage ditches is used as the standard for dividing sub-units. The sub-units are then gridded to obtain the sub-basin division results of the irrigation area. A dynamic irrigation triggering mechanism is constructed for each irrigation district sub-basin, and based on the division results of the irrigation district sub-basins, a multi-water source collaborative scheduling scheme for each irrigation district sub-basin is determined. When irrigating each irrigation sub-basin according to the multi-water source coordinated scheduling scheme, the canal system leakage in each irrigation sub-basin is calculated, and the water allocation scheme for each irrigation sub-basin is determined based on the canal system leakage.

2. The method for simulating irrigation volume in a rice irrigation area according to claim 1, characterized in that, The expression for the dynamic irrigation triggering mechanism is: ， ， ， In the formula, This refers to the lower limit of the water layer depth for paddy field irrigation. The lower limit of irrigation water for paddy fields is defined as the percentage of soil saturation moisture content. This represents the soil saturation water content. For irrigation volume, This is the upper limit of the water layer depth for irrigation. This represents the current soil moisture content.

3. The method for simulating irrigation volume in a rice irrigation area according to claim 1, characterized in that, The expression for the multi-source coordinated scheduling scheme is: ， ， ， In the formula, This represents the actual amount of water injected from external water sources. The water demand for irrigation from external water sources in the sub-basins of the irrigation district. The amount of water available for irrigation from external water sources entering the sub-basin of the irrigation district. This refers to the percentage of external water sources that can be used for irrigation out of the total water volume. This refers to the total amount of water entering the sub-basin of the irrigation area from external water sources.

4. The method for simulating irrigation volume in a rice irrigation area according to claim 1, characterized in that, The expression for calculating the leakage of the canal system is as follows: ， ， In the formula, This refers to the leakage rate of the canal system. For the gross irrigation water volume of the irrigated sub-basin, The water utilization coefficient of the water conveyance canal system. The water utilization coefficient of the water distribution canal system Area threshold The area of ​​the irrigated sub-basin.

5. The method for simulating irrigation volume in a rice irrigation area according to claim 1, characterized in that, The step of determining the water allocation scheme for each irrigation sub-basin based on the canal system leakage includes: Obtain the gross irrigation water volume for each irrigation sub-basin; Determine the canal system type based on the area threshold A: When the irrigated sub-basin area When the area threshold A is greater than the area threshold A, the leakage of the canal system is calculated based on the water utilization coefficient of the water conveyance canal system and the water utilization coefficient of the water distribution canal system. When the irrigated sub-basin area When the area threshold A is not greater than the area threshold A, the leakage of the water distribution canal system is calculated only based on the water utilization coefficient of the water distribution canal system. The calculated canal leakage is subtracted from the gross irrigation water volume to obtain the net irrigation water volume. ,in, This refers to the leakage rate of the canal system. Gross irrigation water volume for irrigating sub-basins; Based on the net irrigation water volume of each irrigation sub-basin The actual irrigation water allocation for each irrigation sub-basin is dynamically adjusted based on crop water requirements and soil moisture content.

6. The method for simulating irrigation volume in a rice irrigation area according to claim 5, characterized in that, The net irrigation water volume of each irrigation sub-basin is used as a basis. The actual irrigation water allocation for each irrigation sub-basin is dynamically adjusted based on crop water requirements and soil moisture content, including: Obtain basic hydrological parameters and real-time soil moisture content (vol) for each irrigation sub-basin; When the soil moisture content is lower than the lower limit water layer depth for paddy field irrigation, the actual irrigation water volume is dynamically allocated according to a preset allocation rule to obtain the current soil moisture content. The allocation rule is as follows: Based on the net irrigation water volume and the preset crop growth stage adjustment coefficient Calculate the actual water allocation Among them, during the greening period, the crop growth stage adjustment coefficient =1.2, Tillering stage, crop growth stage adjustment coefficient =1.0, Adjustment coefficient for crop growth stage during the booting stage. =1.1, maturity period, crop growth stage adjustment coefficient =0.8; Current soil moisture content = Soil moisture content at the previous moment + - Crop evapotranspiration.

7. A rice irrigation area irrigation volume simulation system, characterized in that, include: The subdivision module is configured to be based on DEM and digital canal system, using the area controlled by backbone canals and drainage ditches as the standard for dividing sub-units, and performing grid division on sub-units to obtain the sub-basin division results of irrigation district; The module is configured to construct a dynamic irrigation triggering mechanism for each irrigation district sub-basin, and based on the division results of the irrigation district sub-basins, determine a multi-water source collaborative scheduling scheme for each irrigation district sub-basin. The calculation module is configured to calculate the canal leakage in each irrigation sub-basin when irrigating each irrigation sub-basin according to the multi-water source coordinated scheduling scheme, and to determine the water allocation scheme for each irrigation sub-basin based on the canal leakage.

8. An electronic device, characterized in that, include: At least one processor, and a memory communicatively connected to the at least one processor, wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method according to any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by a processor, it implements the method described in any one of claims 1 to 6.

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