A method and terminal for determining water distribution flow control points in irrigation areas

Abstract

The present invention provides a method and terminal for determining water distribution flow control points in an irrigation area, which obtain the number of initial water distribution zones in the irrigation area and the initial area of ​​the initial water distribution zones, and obtain the second irrigation area corresponding to each branch canal on the main canal; obtain the number of target water distribution zones and the branch canal identification set of the branch canals corresponding to each target water distribution zone according to the number of initial water distribution zones, the initial area and the second irrigation area; set the water distribution flow control point according to the branch canal identification set; the present invention sets the water distribution flow control point according to the branch canal identification set, refines the water distribution to the irrigation area corresponding to each branch canal, determines the setting position of the water distribution flow control point according to the irrigation area, ensures that the irrigation area corresponding to each water distribution flow control point tends to be average, ensures the water use balance of each target water distribution zone, and realizes the reasonable allocation of water resources in the irrigation area.

Description

Technical Field

[0001] The invention relates to the field of irrigation, and in particular to a method and a terminal for determining a water distribution flow control point in an irrigation area. Background Art

[0002] The current method of selecting water distribution flow control points in irrigation areas is usually for management personnel to select water distribution flow control points based on experience, mainly referring to the design flow of the continuous irrigation channel in the irrigation and drainage engineering design standard (GB 50288-2018), and not matching the channel flow with the specific actual irrigation area. Usually, it only constrains the total amount of water distribution in the irrigation area, and there is no clear guidance and enforceability for the control and scheduling time of the water distribution process, lacks scientific reference basis, and has poor enforceability.

[0003] Moreover, the total water consumption control is only a numerical requirement, which cannot be planned according to the irrigation distribution of the irrigation area; and the traditional water distribution flow control points are selected through manual experience, lack scientific basis, and cannot be used as a reference, which will cause many problems in actual application; the total water distribution amount is closely related to factors such as water distribution time and flow, which can easily cause uneven distribution of water resources. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a method and a terminal for determining a water distribution flow control point in an irrigation area, so as to realize a reasonable allocation of water resources in the irrigation area.

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is:

[0006] A method for determining a water distribution flow control point in an irrigation area comprises the following steps:

[0007] Obtain the number of initial water distribution zones of the irrigation area and the initial areas of the initial water distribution zones, and obtain the second irrigation area corresponding to each branch canal on the main canal;

[0008] According to the number of the initial water distribution zones, the initial area and the second irrigation area, the number of target water distribution zones and a set of branch channel identifiers of the branch channels corresponding to each target water distribution zone are obtained;

[0009] The water distribution flow control point is set according to the branch channel identification set.

[0010] In order to solve the above technical problems, another technical solution adopted by the present invention is:

[0011] A terminal for determining a water distribution flow control point in an irrigation area comprises a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the following steps are implemented:

[0012] Obtain the number of initial water distribution zones of the irrigation area and the initial areas of the initial water distribution zones, and obtain the second irrigation area corresponding to each branch canal on the main canal;

[0013] According to the number of the initial water distribution zones, the initial area and the second irrigation area, the number of target water distribution zones and a set of branch channel identifiers of the branch channels corresponding to each target water distribution zone are obtained;

[0014] The water distribution flow control point is set according to the branch channel identification set.

[0015] The beneficial effects of the present invention are as follows: according to the second irrigation area corresponding to each branch canal on the main canal of the irrigation area, the initial area of ​​the initial water distribution zone and the number of initial water distribution zones, the target number of water distribution zones and the branch channel identification set of the branch canals corresponding to each target water distribution zone are obtained; the water distribution flow control point is set according to the branch channel identification set, water is distributed according to the irrigation area corresponding to each branch canal, the setting position of the water distribution flow control point is determined according to the irrigation area, the irrigation area corresponding to each water distribution flow control point is ensured to be average, the water use balance of each target water distribution zone is guaranteed, and the reasonable allocation of water resources in the irrigation area is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A flowchart of a method for determining a water distribution flow control point in an irrigation area according to an embodiment of the present invention;

[0017] Figure 2 This is a structural schematic diagram of an irrigation area water distribution flow control point determination terminal according to an embodiment of the present invention;

[0018] Figure 3 A schematic diagram of the steps of a specific implementation method of a method for determining a water distribution flow control point in an irrigation area according to an embodiment of the present invention;

[0019] Figure 4 A schematic diagram of an irrigation area scenario according to an embodiment of the present invention;

[0020] Description of labels:

[0021] 1. A terminal for determining a water distribution flow control point in an irrigation area; 2. A processor; 3. A memory. DETAILED DESCRIPTION

[0022] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0023] Please refer to Figure 1 , a method for determining a water distribution flow control point in an irrigation area, comprising the steps of:

[0024] Obtain the number of initial water distribution zones of the irrigation area and the initial areas of the initial water distribution zones, and obtain the second irrigation area corresponding to each branch canal on the main canal;

[0025] According to the number of the initial water distribution zones, the initial area and the second irrigation area, the number of target water distribution zones and a set of branch channel identifiers of the branch channels corresponding to each target water distribution zone are obtained;

[0026] The water distribution flow control point is set according to the branch channel identification set.

[0027] From the above description, it can be seen that the beneficial effects of the present invention are: according to the second irrigation area corresponding to each branch canal on the main canal of the irrigation area, the initial area of ​​the initial water distribution zone and the number of initial water distribution zones, the target number of water distribution zones and the branch canal identification set of each target water distribution zone are obtained, the water distribution flow control point is set according to the branch canal identification set, the water is distributed according to the irrigation area corresponding to each branch canal, the setting position of the water distribution flow control point is determined according to the irrigation area, the irrigation area corresponding to each water distribution flow control point is ensured to be average, the water use balance of each target water distribution zone is guaranteed, and the reasonable allocation of water resources in the irrigation area is realized.

[0028] Furthermore, the number of target water distribution zones and the set of branch channel identifiers of the branch channels corresponding to each target water distribution zone are obtained according to the number of the initial water distribution zones, the initial area and the second irrigation area, including:

[0029] Obtain the first irrigation area corresponding to the main canal;

[0030] Obtaining the initial area of ​​each initial water distribution zone according to the first irrigation area and the number of the initial water distribution zones, and numbering the initial water distribution zones in order of upstream and downstream positions;

[0031] The initial area is adjusted according to the second irrigation area until the second irrigation area corresponding to each branch canal is in the same initial water distribution zone, and the target water distribution zone number and the branch canal identification set of the branch canals corresponding to each target water distribution zone are obtained.

[0032] From the above description, it can be seen that the ideal initial area of ​​each initial water distribution zone is first obtained according to the total first irrigation area corresponding to the main canal and the number of initial water distribution zones. The initial areas of each initial water distribution zone are the same, that is, under ideal circumstances, the water distribution of each zone is in a balanced state. However, because the irrigation area corresponding to each branch canal is different, and it is obviously unreasonable to divide different sections of a branch canal into different water distribution zones, it is necessary to adjust the initial area according to the second irrigation area of ​​each branch canal so that the target water distribution zone finally obtained is executable.

[0033] Furthermore, the initial area of ​​each initial water distribution zone is obtained according to the first irrigation area and the number of the initial water distribution zones, including:

[0034]

[0035] Wherein, K represents the initial area of ​​the initial water distribution zone; S i represents the second irrigation area corresponding to the i-th branch canal, i represents the branch canal identifier, n represents the total number of branch canals, represents the first irrigation area; J represents the number of initial water distribution zones.

[0036] From the above description, it can be seen that the second irrigation area corresponding to each branch canal is added to obtain the first irrigation area of ​​the main canal, which is equally divided into the number of initial water distribution zones to obtain the initial area of ​​each initial water distribution zone, thereby ensuring the balance of the initial area of ​​each initial water distribution zone and providing a basis for subsequent adjustments, so that the irrigation area corresponding to each target water distribution zone is balanced.

[0037] Furthermore, before adjusting the initial area according to the second irrigation area, the method further includes:

[0038] The branch channels are numbered in order of upstream and downstream positions to obtain branch channel identifiers corresponding to each branch channel.

[0039] From the above description, it can be seen that since the branch canals all have the main canal as their source, the branch canals are numbered according to their upstream and downstream positions to obtain branch canal identification, which makes it easier to arrange adjacent branch canals together when calculating the target water distribution area, thereby facilitating subsequent water distribution.

[0040] Further, the initial area is adjusted according to the second irrigation area until the second irrigation area corresponding to each branch canal is in the same initial water distribution area, and the number of target water distribution areas and the branch canal identifier set of the branch canal corresponding to each target water distribution area are obtained, including:

[0041] Arrange the branch channels in the order of the branch channel identifiers to obtain a branch channel set;

[0042] The branch canal set is traversed, and when a target branch canal in the branch canal set is traversed, the second irrigation area corresponding to the target branch canal is obtained, and the sum of all the second irrigation areas currently obtained is calculated. If the sum of the second irrigation areas is greater than or equal to the initial area, the sum of the second irrigation areas is cleared to 0, and the branch canal identifier corresponding to the target branch canal is the branch canal identifier set corresponding to the target water distribution area.

[0043] From the above description, it can be seen that the sum of the second irrigation areas corresponding to the branch canals in the branch canal set is obtained in sequence and added until the sum of the second irrigation areas is greater than or equal to the initial area. The corresponding branch canals belong to the target water distribution zone, and the sum of their second irrigation areas is the area of ​​the adjusted target water distribution zone. Based on the initial area, the actual irrigation area of ​​the branch canals is taken into consideration to adjust the initial area of ​​each initial water distribution zone, thereby ensuring the practicality of the final plan.

[0044] Furthermore, if the sum of the second irrigation areas is smaller than the initial area when all the branch canals in the branch canal set are acquired, the first standard deviation of the area of ​​the current target initial water distribution zone relative to the initial area and the second standard deviation of the sum of the areas of the previous target initial water distribution zone and the current target initial water distribution zone relative to the initial area are calculated;

[0045] If the first standard deviation is less than or equal to the second standard deviation, retain the current target initial water distribution zone;

[0046] If the first standard deviation is greater than the second standard deviation, the current target initial water distribution zone is merged into the previous target initial water distribution zone.

[0047] From the above description, it can be seen that if all the branch canals in the branch canal set are acquired, but the sum of the second irrigation areas is still smaller than the initial area, the area of ​​the current target water distribution zone, that is, the sum of the second irrigation areas corresponding to the branch canals included therein and the first standard deviation of the initial area are calculated, and the second standard deviation of the sum of the area of ​​the current target water distribution zone and the area of ​​its previous target water distribution zone and the initial area are calculated. If the first standard deviation is less than or equal to the second standard deviation, it means that treating the current target water distribution zone as a separate water distribution zone is closer to the ideal equilibrium state. If the first standard deviation is greater than the second standard deviation, it means that combining the current target water distribution zone and its previous target water distribution zone into one water distribution zone is closer to the ideal equilibrium state. The calculation of the standard deviation is introduced when determining the last water distribution zone, so that the final zone is more balanced.

[0048] Furthermore, setting the water distribution flow control point according to the branch channel identifier set includes:

[0049] Get the first branch channel identifier in the branch channel identifier set of the current target water distribution area j, and get the first distance g between the branch channel A and the head of the channel corresponding to the first branch channel identifier jA ;

[0050] Obtain the last branch channel identifier in the combination of branch channel identifiers of the previous target water distribution zone j-1 of the current target water distribution zone, and obtain the second distance g between the branch channel B corresponding to the last branch channel identifier and the head of the channel (j-1)B ;

[0051] Calculate the distance C between the water distribution flow control point and the canal head j :

[0052] .

[0053] From the above description, it can be seen that a water distribution flow control point is set up in the middle position of two target water distribution zones to facilitate the control of the flow of each target water distribution zone.

[0054] Furthermore, after setting the water distribution flow control point according to the branch channel identifier set, the method further includes:

[0055] Obtain the preset water distribution cycle and total flow of the main channel;

[0056] Calculate the minimum water distribution volume corresponding to each of the water distribution flow control points and the water distribution cycle;

[0057] Obtaining the minimum flow of the main channel according to the minimum water distribution;

[0058] If the total flow of the main channel is greater than the minimum flow of the main channel, the actual water distribution volume corresponding to each water distribution flow control point is calculated according to the total flow of the main channel, and water is distributed according to the actual water distribution volume.

[0059] From the above description, it can be seen that the minimum water distribution volume is first calculated according to the preset water distribution cycle. If it is greater than the total flow of the main canal, the water distribution cycle is adjusted to achieve stable water distribution for each target water distribution zone.

[0060] Furthermore, if the total flow of the main channel is less than the minimum flow of the main channel, the step of calculating the minimum water distribution volume corresponding to each water distribution flow control point and the water distribution cycle is re-executed after adjusting the water distribution cycle.

[0061] From the above description, it can be seen that if the minimum water distribution volume calculated according to the preset water distribution cycle cannot be met by the existing total flow of the main canal, the minimum water distribution volume will be recalculated after changing the water distribution cycle, and the water distribution cycle that adapts to the total flow of the main canal can be obtained for allocation to ensure normal water distribution in the irrigation area.

[0062] Please refer to Figure 2 , a terminal for determining an irrigation area water distribution flow control point, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps in the above-mentioned method for determining an irrigation area water distribution flow control point when executing the computer program.

[0063] Please refer to Figure 1 , Embodiment 1 of the present invention is:

[0064] A method for determining a water distribution flow control point in an irrigation area comprises the following steps:

[0065] S1. Obtain the number of initial water distribution zones of the irrigation area and the initial areas of the initial water distribution zones, and obtain the second irrigation area corresponding to each branch canal on the main canal;

[0066] S2. Obtaining the number of target water distribution zones and a set of branch channel identifiers of the branch channels corresponding to each target water distribution zone according to the number of the initial water distribution zones, the initial area and the second irrigation area, including:

[0067] S21, obtaining a first irrigation area corresponding to the main canal, obtaining an initial area of ​​each initial water distribution zone according to the first irrigation area and the number of the initial water distribution zones, and numbering the initial water distribution zones in order of upstream and downstream positions;

[0068] Among them, the initial area of ​​each initial water distribution zone is obtained according to the first irrigation area and the number of initial water distribution zones:

[0069] ;

[0070] Wherein, K represents the initial area of ​​the initial water distribution zone; S i represents the second irrigation area corresponding to the i-th branch canal, i represents the branch canal identifier, n represents the total number of branch canals, represents the first irrigation area; J represents the number of initial water distribution zones; for details, please refer to Figure 4 The second irrigation area is S1-S shown therein. i The first irrigation area corresponding to the main canal is the sum of the second irrigation areas corresponding to all branch canals on the main canal.

[0071] S22, adjusting the initial area according to the second irrigation area until the second irrigation area corresponding to each branch canal is in the same initial water distribution zone, and obtaining the number of target water distribution zones and a set of branch canal identifiers of the branch canals corresponding to each target water distribution zone;

[0072] In an optional implementation manner, the branch channel identification is to number the branch channels in order of upstream and downstream positions to obtain a branch channel identification corresponding to each branch channel;

[0073] S3. Setting a water distribution flow control point according to the branch channel identification set.

[0074] Embodiment 2 of the present invention is:

[0075] A method for determining a water distribution flow control point in an irrigation area, which differs from the first embodiment in that:

[0076] The S22 includes:

[0077] S221, arranging the branch channels in the order of the branch channel identifiers to obtain a branch channel set;

[0078] S222, traversing the branch canal set, when traversing to the target branch canal in the branch canal set, obtaining the second irrigation area corresponding to the target branch canal, and calculating the sum of all the second irrigation areas currently obtained, if the sum of the second irrigation areas is greater than or equal to the initial area, then clearing the sum of the second irrigation areas to 0, and the branch canal identifier corresponding to the target branch canal is the branch canal identifier set corresponding to the same target water distribution zone;

[0079] If the sum of the second irrigation areas is smaller than the initial area, continue to traverse the branch canal set;

[0080] For example, please refer to Figure 4 ,by Figure 4 As an example, a finite number of branch canals is taken for further explanation; if the branch canal set is (branch canal 1, branch canal 2, branch canal 3, branch canal 4, branch canal 5), the corresponding second irrigation areas are 30,000 mu, 10,000 mu, 15,000 mu, 20,000 mu and 25,000 mu respectively, and the number of initial water distribution zones is 2, then the arithmetic mean is calculated to obtain an initial area of ​​50,000 mu; traverse the branch canal set, such as traversing to branch canal 1, obtain its corresponding second irrigation area of ​​30,000 mu < 50,000 mu, continue to traverse the branch canal set to obtain branch canal 2, and its corresponding second irrigation area is 10,000 mu. At this time, the sum of the second irrigation areas is 40,000 mu. If the sum of the second irrigation area is less than 50,000 mu, continue to traverse the branch canal set to obtain branch canal 3. At this time, the sum of the second irrigation area is 60,000 mu> 50,000 mu, then the sum of the second irrigation area is cleared, and the branch canal identifiers (branch canal 1, branch canal 2, branch canal 3) are the branch canal identifier sets corresponding to the same target water distribution area. Therefore, the sum of the second irrigation area of ​​branch canals 4 and 5 is 45,000 mu, which is less than 50,000 mu, and there are no subsequent branch canals. Therefore, branch canals 4 and 5 are the branch canal identifier sets corresponding to another target water distribution area. If there are other branch canals in the future, repeat the above process of calculating branch canals 1-branch canal 3;

[0081] Furthermore, S222 further includes: if the sum of the second irrigation areas is smaller than the initial area when all the branch canals in the branch canal set are acquired, then calculating a first standard deviation of the area of ​​the current target water distribution zone relative to the initial area and a second standard deviation of the sum of the areas of the previous target water distribution zone and the current target water distribution zone relative to the initial area;

[0082] If the first standard deviation is less than or equal to the second standard deviation, retain the current target initial water distribution zone;

[0083] If the first standard deviation is greater than the second standard deviation, merging the current target water distribution zone into the previous target water distribution zone;

[0084] In an optional implementation, if the first standard deviation is greater than the second standard deviation, the number of the initial water distribution zones is reduced by 1 and the process returns to the step of obtaining the initial area of ​​each initial water distribution zone based on the first irrigation area and the number of the initial water distribution zones;

[0085] Among them, calculate the first standard deviation SD j Specifically: ; At this time, the current target water distribution zone is taken as an independent water distribution zone, and the first standard deviation of all the target water distribution zones obtained so far and K is calculated;

[0086] The calculation of the second standard deviation SDj-1 is specifically as follows: ; At this time, the current target water distribution zone and its previous target water distribution zone are taken as independent water distribution zones, and then the first standard deviation of all the target water distribution zones obtained so far and K is calculated;

[0087] Where J represents the number of initial water distribution zones, and j represents the jth initial water distribution zone;

[0088] If the sum of the second irrigation areas of branch canal 4 and branch canal 5 is 45 < 50, then calculate the first standard deviation of 45 and 50 and the second standard deviation of 60 + 45 and 50. Obviously, the first standard deviation is less than the second standard deviation, so the current target initial water distribution zone is retained, that is, (branch canal 1, branch canal 2, branch canal 3) and (branch canal 4, branch canal 5);

[0089] S222 also includes: if all the branch canals in the branch canal set are acquired, and the number of the current target water distribution partitions is less than the number of the initial water distribution partitions, then reducing the number of the initial water distribution partitions and re-executing S2;

[0090] S3 includes:

[0091] Get the first branch channel identifier in the branch channel identifier set of the current target water distribution area j, and get the first distance g between the branch channel A and the head of the channel corresponding to the first branch channel identifier jA ;

[0092] Obtain the last branch channel identifier in the combination of branch channel identifiers of the previous target water distribution zone j-1 of the current target water distribution zone, and obtain the second distance g between the branch channel B corresponding to the last branch channel identifier and the head of the channel (j-1)B ;

[0093] In an optional embodiment, g jA That is the pile number corresponding to branch channel A; g (j-1)B This is the pile number corresponding to branch channel B;

[0094] It can be seen that if the current target water distribution zone is the last target water distribution zone, that is, there is no next target water distribution zone, then there is no need to set the water distribution flow control point;

[0095] Calculate the distance C between the water distribution flow control point and the canal head corresponding to the current target water distribution zone j j :

[0096] .

[0097] Embodiment 3 of the present invention is:

[0098] A method for determining a water distribution flow control point in an irrigation area, which differs from the other embodiments in that:

[0099] S3 and later also include:

[0100] S41, obtaining a preset water distribution cycle and a total flow of the main channel;

[0101] S42, calculating the minimum water distribution volume corresponding to each of the water distribution flow control points and the water distribution cycle;

[0102] S43, obtaining the minimum flow of the main channel according to the minimum water distribution volume; if the total flow of the main channel is greater than the minimum flow of the main channel, calculating the actual water distribution volume corresponding to each water distribution flow control point according to the total flow of the main channel, and distributing water according to the actual water distribution volume;

[0103] If the total flow of the main channel is less than the minimum flow of the main channel, then adjust the water distribution cycle and re-execute S42;

[0104] Specifically, the water distribution flow control point (q0) is started from the last water distribution flow control point (q J ) flow calculation:

[0105] Here, set C j is the distance between the water distribution flow control point corresponding to the j-th target water distribution zone and the canal head, and the water distribution flow control point is the water distribution flow control point closest to the j-th target water distribution zone and located upstream of the target water distribution zone;

[0106] Flow rate q at the water distribution flow control point j =(B (j-1)g -C jg ) +P j / T;

[0107] q j-1 =q j +(B (j-2)g -C (j-1)g ) +P j-1 / T;

[0108] in, represents the flow loss per kilometer on the main canal, B jg represents the distance between the first branch canal (the most upstream branch canal) of the jth target water distribution zone and the canal head; C jg represents the distance between the water distribution flow control point corresponding to the jth target water distribution area and the canal head; P j represents the second irrigation area corresponding to the j-th branch canal; 0≤j≤J, J corresponds to the number of target water distribution zones;

[0109] Then the first q0 is the minimum flow rate of the main canal to meet the time water distribution cycle T;

[0110] In an optional implementation, according to the water distribution cycle requirements, the control flow of each water distribution flow control point C is calculated to obtain the control flow of each water distribution flow control point, and a water distribution flow control table as shown in Table 1 is generated;

[0111] Table 1

[0112]

[0113] The water distribution flow results are visualized, and water distribution can be implemented directly according to the table in the future, which is clear and concise.

[0114] Please refer to Figure 2 , Embodiment 4 of the present invention is:

[0115] An irrigation area water distribution flow control point determination terminal 1 includes a processor 2, a memory 3, and a computer program stored in the memory 3 and executable on the processor 2. When the processor 2 executes the computer program, each step in the first, second or third embodiment is implemented.

[0116] In summary, the present invention provides a method and terminal for determining water distribution flow control points in an irrigation area. The method first determines the initial area according to the preset number of initial water distribution zones in the irrigation area and the first irrigation area of ​​the main canal, and then adjusts the initial area according to the second irrigation area of ​​each branch canal to formulate irrigation zones. The original specification that only considers channel hydraulic calculation is changed, and the flow of each control point is determined through a zoning algorithm to ensure balanced water use in each zone. The setting of water distribution flow control points of the main canal of the irrigation area is achieved through the irrigation area and the zoning algorithm, which is more scientific than relying on manual experience to select. The flow of each water distribution flow control point can be quickly calculated in combination with the channel flow loss, and a water distribution plan is formulated in combination with the water distribution cycle to ensure balanced water distribution. The channel hydraulic calculation method starting from the main canal is changed to avoid managers selecting flow control points through manual experience. And the water from the main canal will eventually flow into the fields of the branch canal. Therefore, irrigation zoning is carried out based on the irrigation area of ​​the branch canal, so that the selected water distribution flow control points can more scientifically determine the flow control points and assist management personnel in formulating water distribution scheduling plans. This method can scientifically select water distribution flow control points to ensure that farmland in different zones can obtain sufficient water distribution, effectively assist irrigation area management personnel in formulating water distribution plans, and at the same time, ensure that water resources are distributed evenly within the water distribution cycle, effectively reducing secondary water distribution caused by insufficient local water distribution.

[0117] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for determining water distribution flow control points in an irrigation area, characterized in that: Includes steps: Obtain the number of initial water distribution zones in the irrigation area, and obtain the second irrigation area corresponding to each branch canal on the main canal; Acquire a first irrigation area corresponding to the main canal; the first irrigation area corresponding to the main canal is the sum of the second irrigation areas corresponding to all branch canals on the main canal; Obtaining an initial area of ​​each initial water distribution zone according to the first irrigation area and the number of the initial water distribution zones; The branch channels are numbered in order of upstream and downstream positions to obtain branch channel identifiers corresponding to each branch channel; Arrange the branch channels in the order of the branch channel identifiers to obtain a branch channel set; Traversing the branch canal set, when traversing to the target branch canal in the branch canal set, obtaining the second irrigation area corresponding to the target branch canal, and calculating the sum of all the second irrigation areas currently obtained, if the sum of the second irrigation areas is greater than or equal to the initial area, clearing the sum of the second irrigation areas to 0, and the branch canal identifier corresponding to the target branch canal is the branch canal identifier set corresponding to the target water distribution zone; The water distribution flow control point is set according to the branch channel identification set.

2. A method for determining irrigation area water distribution flow control points according to claim 1, characterized in that: The initial area of ​​each initial water distribution zone obtained according to the first irrigation area and the number of the initial water distribution zones comprises: Wherein, K represents the initial area of ​​the initial water distribution zone; Si represents the second irrigation area corresponding to the i-th branch canal, i represents the branch canal identifier, and n represents the total number of branch canals. represents the first irrigation area; J represents the number of initial water distribution zones.

3. A method for determining irrigation area water distribution flow control points according to claim 1, characterized in that: If all the branch canals in the branch canal set have been acquired, and the sum of the second irrigation areas is smaller than the initial area, then the first standard deviation of the area of ​​the current target water distribution zone relative to the initial area and the second standard deviation of the sum of the areas of the previous target water distribution zone and the current target water distribution zone relative to the initial area are calculated; If the first standard deviation is less than or equal to the second standard deviation, retain the current target initial water distribution zone; If the first standard deviation is greater than the second standard deviation, the current target initial water distribution zone is merged into the previous target initial water distribution zone.

4. A method for determining irrigation area water distribution flow control points according to claim 1, characterized in that: The step of setting the water distribution flow control point according to the branch channel identifier set comprises: Obtain the first branch channel identifier in the branch channel identifier set of the current target water distribution zone j, and obtain the first distance gjA between the branch channel A corresponding to the first branch channel identifier and the channel head; Obtain the last branch channel identifier in the combination of branch channel identifiers of the previous target water distribution zone j-1 of the current target water distribution zone, and obtain the second distance g(j-1)B between the branch channel B corresponding to the last branch channel identifier and the channel head; Calculate the distance Cj between the water distribution flow control point and the canal head: 。 5. The method for determining the irrigation area water distribution flow control point according to claim 1, characterized in that: After setting the water distribution flow control point according to the branch channel identifier set, the following step further comprises: Obtain the preset water distribution cycle and total flow of the main channel; Calculate the minimum water distribution volume corresponding to each of the water distribution flow control points and the water distribution cycle; Obtaining the minimum flow of the main channel according to the minimum water distribution; If the total flow of the main channel is greater than the minimum flow of the main channel, the actual water distribution volume corresponding to each water distribution flow control point is calculated according to the total flow of the main channel, and water is distributed according to the actual water distribution volume.

6. A method for determining irrigation area water distribution flow control points according to claim 5, characterized in that: If the total flow of the main channel is less than the minimum flow of the main channel, the step of calculating the minimum water distribution volume corresponding to each water distribution flow control point and the water distribution cycle is re-executed after adjusting the water distribution cycle.

7. A terminal for determining a water distribution flow control point in an irrigation area, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method for determining the irrigation area water distribution flow control point according to any one of claims 1-6 are implemented.

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