Hydraulic engineering dynamic simulation method and system based on digital twinning

Abstract

The invention relates to the related field of water conservancy projects, and discloses a water conservancy project dynamic simulation method and system based on digital twinning. Global data synchronization is carried out on a radiation irrigation area of an agricultural irrigation water conservancy project, and simulation is carried out through a twinning system; the water loss rate of different irrigation areas in the irrigation period is judged based on factors such as the environment, different irrigation supply differentiations are adopted for the different irrigation areas according to the total irrigation amount capable of being provided by the water conservancy project, and therefore the different irrigation areas have similar water content after one water supply irrigation period ends and when the next irrigation period starts. The uniformity of crop growth is effectively controlled, and the high utilization rate of irrigation water in seasons lack of water sources is guaranteed.

Description

Technical Field

[0001] The present invention relates to the field related to water conservancy projects, and specifically to a water conservancy project dynamic simulation method and system based on digital twins. Background Art

[0002] Agricultural water conservancy projects are important basic guarantee projects to ensure agricultural operations. They play an important role in agricultural development. They ensure the water supply to farmland in the dry season and the normal growth of crops, and can effectively solve the regional water shortage problem.

[0003] In the existing technology, there is a lack of effective management and scheduling strategies when calling for reservoir irrigation, and it is impossible to allocate water resources according to the actual degree of drought in different irrigation areas. This will result in some irrigation areas that are not very water-scarce having sufficient or even excess water, while some water-scarce areas cannot meet basic irrigation needs. Summary of the invention

[0004] The purpose of the present invention is to provide a water conservancy project dynamic simulation method and system based on digital twins to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A dynamic simulation method for water conservancy projects based on digital twins, comprising:

[0007] Acquire an irrigation distribution map of the water conservancy radiation area, and establish a water conservancy twin model based on the irrigation distribution map, wherein the irrigation distribution map includes the distribution of irrigation areas, the distribution of water conservancy facilities, and the distribution of terrain heights in the radiation area;

[0008] The sensor monitoring data of various places in the radiation area are synchronously updated through the water conservancy twin model, and the evaporation rate of irrigation water in the irrigation area is simulated based on the sensor monitoring data, and the evaporation quantity simulation is used to characterize the surface evaporation rate of the corresponding area;

[0009] Establishing an irrigation demand function for the target irrigation amount of the irrigation area based on the surface evaporation rate, wherein the irrigation demand function is associated with the irrigation evaluation cycle and the current drought degree of the irrigation area, the drought degree being the water content of the farmland;

[0010] The water supply cycle and cycle water supply of the current reservoir are obtained, and water allocation plans are generated for multiple irrigation areas based on the determined water supply cycle and irrigation demand function, so that the water content of farmland in each irrigation area is consistent at the end of the water supply cycle.

[0011] As a further solution of the present invention: it also includes an intelligent scheduling management step, specifically including:

[0012] Obtaining node information of several control nodes in water conservancy facilities, matching multiple irrigation areas with the control nodes, and obtaining the allocated irrigation amount of each irrigation area based on the water conservancy allocation plan, wherein the control nodes are used to control the opening and closing states of the corresponding water conservancy irrigation channels in the irrigation areas;

[0013] The flow data of the control node corresponding to the irrigation area is acquired in real time, and cumulative calculation is performed based on the flow data. When the cumulative total flow reaches the allocated irrigation amount, a termination scheduling signal is generated to control the control node to close.

[0014] As a further solution of the present invention: the sensor data includes local temperature and humidity data, airflow data and surface crop vegetation coverage, and the step of simulating the evaporation rate of irrigation water in the irrigation area based on the sensor monitoring data specifically includes:

[0015] Introducing a surface water evaporation simulation algorithm into the water conservancy twin model, and assigning values ​​to the surface water evaporation simulation algorithm based on the sensor data, wherein the temperature and humidity data and the airflow data are predicted data for a period of time in the future;

[0016] Determine the current water supply cycle, simulate surface water evaporation based on the sensor data within the water supply cycle, and obtain an evaporation fitting curve within the water supply cycle, that is, the surface evaporation rate at different time points within the cycle. The integral value of the evaporation fitting curve represents the total evaporation within the water supply cycle.

[0017] As a further solution of the present invention: in the step of establishing the irrigation demand function of the target irrigation amount of the irrigation area based on the evaporation rate, the function of the irrigation demand Q is characterized as:

[0018] Q = Y - x + m;

[0019] Among them, Y is used to represent the target farmland moisture content after the end of the cycle, x represents the current farmland moisture content, and m is used to represent the total evaporation based on the surface evaporation rate within the cycle, that is, Wherein t is the water supply period, and E(t') is the evaporation fitting curve within the water supply period.

[0020] As a further solution of the present invention, the water conservancy facility includes an irrigation port and a return port in the irrigation area, and the irrigation port is set at the highest terrain point in the irrigation area, and also includes an irrigation mode determination step:

[0021] The terrain of the irrigation area is determined, the inclination slope data of the irrigation area is obtained, and an irrigation rate is established based on the inclination slope data. The irrigation rate is inversely proportional to the inclination slope, and the minimum irrigation rate is the ratio of the allocated irrigation amount of the current irrigation area to the water supply cycle.

[0022] The embodiment of the present invention aims to provide a water conservancy project dynamic simulation system based on digital twin, comprising:

[0023] A twin synchronization module is used to obtain an irrigation distribution map of the water conservancy radiation area and establish a water conservancy twin model based on the irrigation distribution map, wherein the irrigation distribution map includes the distribution of irrigation areas, the distribution of water conservancy facilities, and the distribution of terrain heights in the radiation area;

[0024] An evaporation simulation module is used to synchronously update the sensor monitoring data at various locations in the radiation area through the hydraulic twin model, and simulate the evaporation rate of irrigation water in the irrigation area based on the sensor monitoring data. The evaporation quantity simulation is used to characterize the surface evaporation rate of the corresponding area;

[0025] A demand evaluation module, used for establishing an irrigation demand function of the target irrigation amount of the irrigation area based on the surface evaporation rate, wherein the irrigation demand function is associated with the irrigation evaluation period and the current drought degree of the irrigation area, the drought degree being the water content of the farmland;

[0026] The water supply allocation module is used to obtain the water supply cycle and periodic water supply of the current reservoir, and to allocate water to multiple irrigation areas based on the determined water supply cycle and irrigation demand function to generate a water distribution plan so that the water content of the farmland in each irrigation area is consistent at the end of the water supply cycle.

[0027] As a further solution of the present invention: it also includes an intelligent scheduling module, specifically including:

[0028] A node synchronization unit, used to obtain node information of several control nodes in the water conservancy facilities, match multiple irrigation areas with the control nodes, and obtain the allocated irrigation amount of each irrigation area based on the water conservancy allocation plan. The control nodes are used to control the opening and closing states of the corresponding water conservancy irrigation channels in the irrigation areas;

[0029] The node control unit is used to obtain the flow data of the control node corresponding to the irrigation area in real time, perform cumulative calculation based on the flow data, and generate a termination scheduling signal to control the control node to close when the total cumulative flow reaches the allocated irrigation amount.

[0030] As a further solution of the present invention: the sensing data includes local temperature and humidity data, airflow data and surface crop vegetation coverage, and the evaporation simulation module includes:

[0031] A simulation assignment unit, used for introducing a surface water evaporation simulation algorithm into the water conservancy twin model, and assigning a value to the surface water evaporation simulation algorithm based on the sensor data, wherein the temperature and humidity data and the airflow data are predicted data for a period of time in the future;

[0032] The evaporation simulation unit is used to determine the current water supply cycle, perform surface water evaporation simulation based on the sensor data within the water supply cycle, and obtain the evaporation fitting curve within the water supply cycle, that is, the surface evaporation rate at different time points within the cycle. The integral value of the evaporation fitting curve represents the total evaporation within the water supply cycle.

[0033] As a further solution of the present invention: in the water supply distribution module, the function of the irrigation demand Q is represented as:

[0034] Q = Y - x + m;

[0035] Among them, Y is used to represent the target farmland moisture content after the end of the cycle, x represents the current farmland moisture content, and m is used to represent the total evaporation based on the surface evaporation rate within the cycle, that is, Wherein t is the water supply period, and E(t') is the evaporation fitting curve within the water supply period.

[0036] As a further solution of the present invention: the water conservancy facility comprises an irrigation inlet and a return inlet in the irrigation area, the irrigation inlet is arranged at the highest terrain point in the irrigation area, and also comprises an irrigation mode determination module;

[0037] The irrigation mode determination module is used to determine the terrain of the irrigation area, obtain the inclination slope data of the irrigation area, and establish an irrigation rate based on the inclination slope data. The irrigation rate is inversely proportional to the inclination slope, and the minimum irrigation rate is the ratio of the allocated irrigation amount of the current irrigation area to the water supply cycle.

[0038] Compared with the prior art, the beneficial effects of the present invention are: by synchronizing global data of the radiation irrigation areas of agricultural irrigation water conservancy projects and simulating through a twin system, the water loss rate of different irrigation areas during the irrigation cycle is judged based on environmental factors and other factors, and then the total irrigation volume that can be provided by the water conservancy project is differentiated by different irrigation supply for different irrigation areas, so that different irrigation areas have similar water content at the beginning of the next irrigation cycle after the end of one water supply irrigation cycle, effectively controlling the uniformity of crop growth and ensuring high utilization of irrigation water in seasons with water shortages. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a flowchart of a dynamic simulation method for water conservancy projects based on digital twins.

[0040] Figure 2 This is a flowchart of the intelligent scheduling management steps in a dynamic simulation method of water conservancy projects based on digital twins.

[0041] Figure 3This is a block diagram of the composition of a water conservancy project dynamic simulation system based on digital twins. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0043] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0044] like Figure 1 The present invention provides a method for dynamic simulation of a water conservancy project based on digital twins, which comprises the following steps:

[0045] S10, obtaining an irrigation distribution map of the water conservancy radiation area, and establishing a water conservancy twin model based on the irrigation distribution map, wherein the irrigation distribution map includes the distribution of irrigation areas, the distribution of water conservancy facilities, and the distribution of terrain heights in the radiation area;

[0046] S20, synchronously updating the sensor monitoring data at various locations in the radiation area through the water conservancy twin model, and simulating the evaporation rate of irrigation water in the irrigation area based on the sensor monitoring data, wherein the evaporation quantity simulation is used to characterize the surface evaporation rate of the corresponding area;

[0047] S30, establishing an irrigation demand function for the target irrigation amount of the irrigation area based on the surface evaporation rate, wherein the irrigation demand function is associated with the irrigation evaluation cycle and the current drought degree of the irrigation area, the drought degree being the water content of the farmland;

[0048] S40, obtaining the water supply cycle and cycle water supply of the current reservoir, and allocating water to multiple irrigation areas based on the determined water supply cycle and irrigation demand function to generate a water allocation plan so that the water content of farmland in each irrigation area is consistent at the end of the water supply cycle.

[0049] In this embodiment, a dynamic simulation method of water conservancy projects based on digital twins is provided. By synchronizing the global data of the radiation irrigation area of ​​the agricultural irrigation water conservancy project and simulating it through the twin system, the water loss rate of different irrigation areas in the irrigation cycle is judged based on environmental factors, and then the total irrigation amount that can be provided by the water conservancy project is differentiated by different irrigation supplies for different irrigation areas, so that different irrigation areas have similar water contents at the beginning of the next irrigation cycle after the end of a water supply irrigation cycle, effectively controlling the uniformity of crop growth and ensuring the high utilization rate of irrigation water in the season of water shortage; the purpose of this embodiment is to carry out agricultural water conservancy Management, in the dry season, the supply of available water for agricultural irrigation within a certain period of time may be limited, for example, limited by the storage capacity of the reservoir or the upper limit of the water flow per unit time of the remote water transfer related water station facilities, and in the existing technology, when calling for reservoir irrigation, there is a lack of effective management and scheduling strategies, and it is impossible to allocate water resources according to the actual degree of drought in different irrigation areas. This will result in some irrigation areas that are not very water-scarce having sufficient or even excess water, while some water-scarce areas cannot meet the basic irrigation needs. Usually, the radiation area of ​​a large-scale agricultural irrigation water conservancy facility is large, and factors such as the terrain environment in different regions will lead to There are differences in the demand for water sources. For example, the current water content of areas AB is the same, but the terrain of area A is higher, the vegetation coverage area is lower, and the daily temperature is higher. Therefore, if the amount of water irrigated for a week makes the two areas still have the same remaining water after a week, the actual irrigation amount of area A should be greater than that of area B, because the proportion of additional losses such as daily water evaporation is much greater than that of area B; therefore, this embodiment uses the twin judgment method to determine the degree of drought in different irrigation areas and the loss model based on the environment, and then perform the scheduling and allocation management of irrigation water, so that agricultural products in each area can obtain sufficient and reliable water; the main The steps include: establishing a hydraulic twin model, that is, proposing a proportional hydraulic model based on terrain data, which is used to express the distributed terrain data of different irrigation areas and the relationship with each node of the water conservancy facilities. For example, for area A, the number of the water conservancy canal for irrigation and the control code and other information such as the control gate associated with it; synchronization of environmental data, which is mainly distinguished by irrigation area, including current water volume data, vegetation coverage area data of the area, and local meteorological data. By simulating and judging the water loss efficiency curve in this environment, the irrigation demand can be quantitatively evaluated to achieve the allocation and scheduling of limited irrigation water.

[0050] like Figure 2 As shown, as another preferred embodiment of the present invention, it also includes an intelligent scheduling management step, specifically including:

[0051] S51, obtaining node information of several control nodes in the water conservancy facilities, matching the plurality of irrigation areas with the control nodes, and obtaining the allocated irrigation amount of each irrigation area based on the water conservancy allocation plan, wherein the control nodes are used to control the opening and closing states of the corresponding water conservancy irrigation channels of the irrigation areas;

[0052] S52, acquiring the flow data of the control node corresponding to the irrigation area in real time, performing cumulative calculation based on the flow data, and when the total cumulative flow reaches the allocated irrigation amount, generating a termination scheduling signal to control the control node to close.

[0053] In this embodiment, an intelligent scheduling management step is added, through which fully networked automated control can be achieved instead of manual control management. Based on the previous embodiment, different irrigation areas have different allocated irrigation water volumes, so it is necessary to control the water supply by opening and closing the corresponding irrigation channels (i.e., gates) associated with the water conservancy canals. Manual methods not only require a lot of manpower and involve possible operational risks, but also make it impossible for humans to accurately judge the flow rate and make effective decisions on whether the total allocated water volume has been delivered. Therefore, the water volume is measured synchronously through the Internet of Things data, and the gates are controlled to open and close automatically, which can provide better management results.

[0054] As another preferred embodiment of the present invention, the sensor data includes local temperature and humidity data, airflow data, and surface crop vegetation coverage, and the step of simulating the evaporation rate of irrigation water in the irrigation area based on the sensor monitoring data specifically includes:

[0055] Introducing a surface water evaporation simulation algorithm into the water conservancy twin model, and assigning values ​​to the surface water evaporation simulation algorithm based on the sensor data, wherein the temperature and humidity data and the airflow data are predicted data for a period of time in the future;

[0056] Determine the current water supply cycle, simulate surface water evaporation based on the sensor data within the water supply cycle, and obtain an evaporation fitting curve within the water supply cycle, that is, the surface evaporation rate at different time points within the cycle. The integral value of the evaporation fitting curve represents the total evaporation within the water supply cycle.

[0057] Furthermore, in the step of establishing an irrigation demand function of the target irrigation amount of the irrigation area based on the evaporation rate, the function of the irrigation demand Q is characterized as follows:

[0058] Q = Y - x + m;

[0059] Among them, Y is used to represent the target farmland moisture content after the end of the cycle, x represents the current farmland moisture content, and m is used to represent the total evaporation based on the surface evaporation rate within the cycle, that is, Wherein t is the water supply period, and E(t') is the evaporation fitting curve within the water supply period.

[0060] In this embodiment, the steps of simulating the evaporation rate are explained, and the main consideration here is the surface evaporation and transpiration loss, and its related parameters include the temperature and humidity of the corresponding area and the exposed area of ​​the surface, etc. Therefore, the corresponding related sensor data are supplemented; the reason why the evaporation fitting curve is a variable rather than a simple fixed value is because of the variability of the environment. The overall area of ​​the irrigation area is large. Under this large area, smaller evaporation rate changes can be amplified as a whole. Therefore, the curve function based on environmental changes can more accurately express the loss. After determining a water supply cycle, the total loss can be regarded as the integral value of this evaporation fitting curve.

[0061] As another preferred embodiment of the present invention, the water conservancy facility comprises an irrigation inlet and a return inlet in the irrigation area, and the irrigation inlet is arranged at the highest terrain point in the irrigation area, and further comprises an irrigation mode determination step:

[0062] The terrain of the irrigation area is determined, the inclination slope data of the irrigation area is obtained, and an irrigation rate is established based on the inclination slope data. The irrigation rate is inversely proportional to the inclination slope, and the minimum irrigation rate is the ratio of the allocated irrigation amount of the current irrigation area to the water supply cycle.

[0063] In this embodiment, the irrigation mode is further supplemented, that is, the irrigation water flow rate (flow rate per unit time) during irrigation is set according to the flatness and inclination of the irrigation area, under the premise of ensuring that the irrigation task can be completed within one irrigation water supply cycle. For example, when an irrigation area has a large inclination, if the irrigation water flow rate is too fast and the irrigation water is poured in a short time, the water will quickly flow to the low-lying areas, which will cause the higher areas to be unable to be penetrated by the irrigation water, affecting the irrigation effect. Therefore, in this case, a slow irrigation method is adopted to fully ensure the irrigation effect of the high-lying areas during the irrigation process.

[0064] like Figure 3 As shown, the present invention also provides a method and system for dynamic simulation of water conservancy projects based on digital twins, which comprises:

[0065] The twin synchronization module 100 is used to obtain an irrigation distribution map of the water conservancy radiation area and establish a water conservancy twin model based on the irrigation distribution map, wherein the irrigation distribution map includes the distribution of irrigation areas, the distribution of water conservancy facilities and the distribution of terrain heights in the radiation area;

[0066] The evaporation simulation module 200 is used to synchronously update the sensor monitoring data at various locations in the radiation area through the hydraulic twin model, and simulate the evaporation rate of irrigation water in the irrigation area based on the sensor monitoring data. The evaporation quantity simulation is used to characterize the surface evaporation rate of the corresponding area;

[0067] A demand evaluation module 300 is used to establish an irrigation demand function of the target irrigation amount of the irrigation area based on the surface evaporation rate, wherein the irrigation demand function is associated with the irrigation evaluation period and the current drought degree of the irrigation area, and the drought degree is the water content of the farmland;

[0068] The water supply allocation module 400 is used to obtain the water supply cycle and periodic water supply of the current reservoir, and to allocate water to multiple irrigation areas based on the determined water supply cycle and irrigation demand function to generate a water distribution plan so that the water content of the farmland in each irrigation area is consistent at the end of the water supply cycle.

[0069] As another preferred embodiment of the present invention, it also includes an intelligent scheduling module, specifically including:

[0070] A node synchronization unit, used to obtain node information of several control nodes in the water conservancy facilities, match multiple irrigation areas with the control nodes, and obtain the allocated irrigation amount of each irrigation area based on the water conservancy allocation plan. The control nodes are used to control the opening and closing states of the corresponding water conservancy irrigation channels in the irrigation areas;

[0071] The node control unit is used to obtain the flow data of the control node corresponding to the irrigation area in real time, perform cumulative calculation based on the flow data, and generate a termination scheduling signal to control the control node to close when the total cumulative flow reaches the allocated irrigation amount.

[0072] As another preferred embodiment of the present invention, the sensor data includes local temperature and humidity data, airflow data and surface crop vegetation coverage, and the evaporation simulation module includes:

[0073] A simulation assignment unit, used for introducing a surface water evaporation simulation algorithm into the water conservancy twin model, and assigning a value to the surface water evaporation simulation algorithm based on the sensor data, wherein the temperature and humidity data and the airflow data are predicted data for a period of time in the future;

[0074] The evaporation simulation unit is used to determine the current water supply cycle, perform surface water evaporation simulation based on the sensor data within the water supply cycle, and obtain the evaporation fitting curve within the water supply cycle, that is, the surface evaporation rate at different time points within the cycle. The integral value of the evaporation fitting curve represents the total evaporation within the water supply cycle.

[0075] As another preferred embodiment of the present invention, in the water supply distribution module, the function of the irrigation demand Q is represented by:

[0076] Q = Y - x + m;

[0077] Among them, Y is used to represent the target farmland moisture content after the end of the cycle, x represents the current farmland moisture content, and m is used to represent the total evaporation based on the surface evaporation rate within the cycle, that is, Wherein t is the water supply period, and E(t') is the evaporation fitting curve within the water supply period.

[0078] As another preferred embodiment of the present invention, the water conservancy facility comprises an irrigation inlet and a return inlet in the irrigation area, the irrigation inlet is arranged at the highest terrain point in the irrigation area, and further comprises an irrigation mode determination module;

[0079] The irrigation mode determination module is used to determine the terrain of the irrigation area, obtain the inclination slope data of the irrigation area, and establish an irrigation rate based on the inclination slope data. The irrigation rate is inversely proportional to the inclination slope, and the minimum irrigation rate is the ratio of the allocated irrigation amount of the current irrigation area to the water supply cycle.

[0080] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the program can be stored in a non-volatile computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0081] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the disclosure in the specification and examples. This application is intended to cover any variations, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the claims.

[0082] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A dynamic simulation method for water conservancy projects based on digital twins, characterized in that: Include: Acquire an irrigation distribution map of the water conservancy radiation area, and establish a water conservancy twin model based on the irrigation distribution map, wherein the irrigation distribution map includes the distribution of irrigation areas, the distribution of water conservancy facilities, and the distribution of terrain heights in the radiation area; The sensor monitoring data of various places in the radiation area are synchronously updated through the water conservancy twin model, and the evaporation rate of irrigation water in the irrigation area is simulated based on the sensor monitoring data, and the evaporation quantity simulation is used to characterize the surface evaporation rate of the corresponding area; Establishing an irrigation demand function for the target irrigation amount of the irrigation area based on the surface evaporation rate, wherein the irrigation demand function is associated with the irrigation evaluation cycle and the current drought degree of the irrigation area, the drought degree being the water content of the farmland; The water supply cycle and cycle water supply of the current reservoir are obtained, and water allocation plans are generated for multiple irrigation areas based on the determined water supply cycle and irrigation demand function, so that the water content of farmland in each irrigation area is consistent at the end of the water supply cycle.

2. A water conservancy project dynamic simulation method based on digital twin according to claim 1, characterized in that: It also includes intelligent scheduling management steps, including: Obtaining node information of several control nodes in water conservancy facilities, matching multiple irrigation areas with the control nodes, and obtaining the allocated irrigation amount of each irrigation area based on the water conservancy allocation plan, wherein the control nodes are used to control the opening and closing states of the corresponding water conservancy irrigation channels in the irrigation areas; The flow data of the control node corresponding to the irrigation area is acquired in real time, and cumulative calculation is performed based on the flow data. When the cumulative total flow reaches the allocated irrigation amount, a termination scheduling signal is generated to control the control node to close.

3. A water conservancy project dynamic simulation method based on digital twin according to claim 2, characterized in that: The sensor data includes local temperature and humidity data, airflow data, and surface crop vegetation coverage. The step of simulating the evaporation rate of irrigation water in the irrigation area based on the sensor monitoring data specifically includes: Introducing a surface water evaporation simulation algorithm into the water conservancy twin model, and assigning values ​​to the surface water evaporation simulation algorithm based on the sensor data, wherein the temperature and humidity data and the airflow data are predicted data for a period of time in the future; Determine the current water supply cycle, simulate surface water evaporation based on the sensor data within the water supply cycle, and obtain an evaporation fitting curve within the water supply cycle, that is, the surface evaporation rate at different time points within the cycle. The integral value of the evaporation fitting curve represents the total evaporation within the water supply cycle.

4. A water conservancy project dynamic simulation method based on digital twin according to claim 3, characterized in that: In the step of establishing the irrigation demand function of the target irrigation amount of the irrigation area based on the evaporation rate, the function of the irrigation demand Q is characterized as: Q = Y - x + m; Among them, Y is used to represent the target farmland moisture content after the end of the cycle, x represents the current farmland moisture content, and m is used to represent the total evaporation based on the surface evaporation rate within the cycle, that is, Wherein t is the water supply period, and E(t') is the evaporation fitting curve within the water supply period.

5. The method for dynamic simulation of water conservancy projects based on digital twins according to claim 2 is characterized in that: The water conservancy facility comprises an irrigation inlet and a return inlet in the irrigation area, wherein the irrigation inlet is arranged at the highest terrain point in the irrigation area, and further comprises an irrigation mode determination step: The terrain of the irrigation area is determined, the inclination slope data of the irrigation area is obtained, and an irrigation rate is established based on the inclination slope data. The irrigation rate is inversely proportional to the inclination slope, and the minimum irrigation rate is the ratio of the allocated irrigation amount of the current irrigation area to the water supply cycle.

6. A dynamic simulation system for water conservancy projects based on digital twins, characterized in that: Include: A twin synchronization module is used to obtain an irrigation distribution map of the water conservancy radiation area and establish a water conservancy twin model based on the irrigation distribution map, wherein the irrigation distribution map includes the distribution of irrigation areas, the distribution of water conservancy facilities, and the distribution of terrain heights in the radiation area; An evaporation simulation module is used to synchronously update the sensor monitoring data at various locations in the radiation area through the hydraulic twin model, and simulate the evaporation rate of irrigation water in the irrigation area based on the sensor monitoring data. The evaporation quantity simulation is used to characterize the surface evaporation rate of the corresponding area; A demand evaluation module, used for establishing an irrigation demand function of the target irrigation amount of the irrigation area based on the surface evaporation rate, wherein the irrigation demand function is associated with the irrigation evaluation period and the current drought degree of the irrigation area, the drought degree being the water content of the farmland; The water supply allocation module is used to obtain the water supply cycle and periodic water supply of the current reservoir, and to allocate water to multiple irrigation areas based on the determined water supply cycle and irrigation demand function to generate a water distribution plan so that the water content of the farmland in each irrigation area is consistent at the end of the water supply cycle.

7. A water conservancy project dynamic simulation system based on digital twin according to claim 6, characterized in that: It also includes an intelligent scheduling module, including: A node synchronization unit, used to obtain node information of several control nodes in the water conservancy facilities, match multiple irrigation areas with the control nodes, and obtain the allocated irrigation amount of each irrigation area based on the water conservancy allocation plan. The control nodes are used to control the opening and closing states of the corresponding water conservancy irrigation channels in the irrigation areas; The node control unit is used to obtain the flow data of the control node corresponding to the irrigation area in real time, perform cumulative calculation based on the flow data, and generate a termination scheduling signal to control the control node to close when the total cumulative flow reaches the allocated irrigation amount.

8. A water conservancy project dynamic simulation system based on digital twin according to claim 7, characterized in that: The sensor data includes local temperature and humidity data, airflow data and surface crop vegetation coverage, and the evaporation simulation module includes: A simulation assignment unit, used for introducing a surface water evaporation simulation algorithm into the water conservancy twin model, and assigning a value to the surface water evaporation simulation algorithm based on the sensor data, wherein the temperature and humidity data and the airflow data are predicted data for a period of time in the future; The evaporation simulation unit is used to determine the current water supply cycle, perform surface water evaporation simulation based on the sensor data within the water supply cycle, and obtain the evaporation fitting curve within the water supply cycle, that is, the surface evaporation rate at different time points within the cycle. The integral value of the evaporation fitting curve represents the total evaporation within the water supply cycle.

9. A water conservancy project dynamic simulation system based on digital twin according to claim 8, characterized in that: In the water supply distribution module, the function of the irrigation demand Q is represented as: Q = Y - x + m; Among them, Y is used to represent the target farmland moisture content after the end of the cycle, x represents the current farmland moisture content, and m is used to represent the total evaporation based on the surface evaporation rate within the cycle, that is, Wherein t is the water supply period, and E(t') is the evaporation fitting curve within the water supply period.

10. A water conservancy project dynamic simulation system based on digital twin according to claim 6, characterized in that: The water conservancy facility comprises an irrigation inlet and a return inlet in the irrigation area, wherein the irrigation inlet is arranged at the highest terrain point in the irrigation area, and further comprises an irrigation mode determination module; The irrigation mode determination module is used to determine the terrain of the irrigation area, obtain the inclination slope data of the irrigation area, and establish an irrigation rate based on the inclination slope data. The irrigation rate is inversely proportional to the inclination slope, and the minimum irrigation rate is the ratio of the allocated irrigation amount of the current irrigation area to the water supply cycle.

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