Real-time dynamic water distribution method and system for multi-level channel adaptive irrigation area

Abstract

The present application provides a method and system for real-time dynamic water distribution in irrigation districts with multi-level channels, which includes: obtaining basic data and water supply and demand information of the irrigation district; setting irrigation priority division strategies based on important water diversion gates; setting a dynamic water distribution method of "variable flow, variable duration" based on water balance and flow constraints; constructing a database table structure for the real-time dynamic water distribution model of the irrigation district; constructing a real-time dynamic water distribution model for multi-level channels based on basic data, water supply and demand information, irrigation priority division strategies, dynamic water distribution methods and constructed database table structures; running the real-time dynamic water distribution model to simulate the real-time dynamic water distribution process of multi-level target channels in the irrigation district. The proposal of this application can quickly and accurately simulate the water distribution time, flow and water volume of each water diversion gate on the target channel, provide technical support for the scientific and reasonable formulation of dynamic water distribution plans for canal systems at all levels in the irrigation district, and provide a scientific basis for promoting efficient water use in agriculture.

Description

Technical Field

[0001] The present application relates to the fields of dynamic water distribution technology and computational simulation technology in irrigation areas, and specifically to a real-time dynamic water distribution method and system for adaptive multi-level channels in irrigation areas. Background Art

[0002] To ensure the stable development of agriculture, we must first meet the demand for agricultural water resources and improve the efficiency of agricultural water use (especially agricultural irrigation water). Promoting efficient agricultural water use can be achieved through two measures: water saving in the field and water saving in the water distribution process. The former mainly saves water by changing irrigation methods and technologies, while the latter mainly reduces water loss in water distribution by improving and upgrading canal water distribution facilities and improving canal water distribution plans.

[0003] As the basic basis for irrigation district operation, management and water dispatch, irrigation district managers often adjust the canal water distribution time and water allocation according to factors such as crop planting structure, water demand, and canal structure, and formulate a water distribution plan that meets the crop water demand and time, so as to reduce channel leakage losses and ineffective water abandonment during water delivery. Irrigation district management presents obvious vertical management characteristics. Determining the canal water distribution plan generally requires a top-down (the General Administration prepares a water use plan, and the lower level reviews it), then a bottom-up (the management office compiles a water use plan, and the upper level approves it), and then a top-down (repeated coordination between the upper and lower levels). Moreover, in actual production, lower-level water users often combine the irrigation and water delivery plans issued by the upper-level managers to calculate the best irrigation practices and formulate water use plans that are in line with their own interests based on experience. However, once there is untimely coordination and communication or delays in this process, it often leads to unfavorable situations such as overload operation of the upper-level channels, insufficient supply in the early stage, and increased water abandonment in the later stage.

[0004] Since the design flow rates of various channels in the irrigation area are different, the connection of irrigation water volume in the channels must be considered during the water delivery process to minimize water delivery losses, abandoned water and channel water level fluctuations. In scientific research, the canal water distribution scheme can be optimized through a water distribution model based on the canal water distribution process. Such models generally adopt a "constant flow, variable duration" water distribution method, a water distribution method combining rotation irrigation and continuous irrigation, and take the difference in water diversion flow between rotation irrigation of each water diversion gate on each channel as the goal, and use the gate state and water diversion time of the lower channel as decision variables. However, since such models generally assume that the water distribution flow rates of the lower channels at all levels are equal, and most canals in actual production do not meet this requirement, it is difficult to apply and promote such models in practice. Therefore, it is an urgent problem to develop a real-time dynamic water distribution system for irrigation areas that is suitable for the actual production of irrigation areas and adapted to multi-level canal systems. Summary of the invention

[0005] The present application provides a real-time dynamic water distribution method and system for multi-level channels in irrigation areas, which can solve the technical problem that the water distribution model based on the canal water distribution process in the prior art generally assumes that the water distribution flow of each level of lower-level channels is equal, while most canals in actual production do not meet this requirement, resulting in such models being difficult to be actually applied and promoted.

[0006] In a first aspect, the present application provides a method for adaptive real-time dynamic water distribution in a multi-level channel of an irrigation area, comprising the following steps:

[0007] Obtain basic irrigation area data and water supply and demand information such as canal topology, water demand of target canal diversion gates, water source supply, etc.; set up irrigation priority classification strategies based on important diversion gates; set up a dynamic water distribution method of "variable flow, variable duration" based on water balance and flow constraints;

[0008] Construct the database table structure of the real-time dynamic water distribution model of the irrigation area;

[0009] Based on basic data, water supply and demand information, irrigation priority classification strategy, dynamic water distribution method and constructed database table structure, a multi-level channel adaptive real-time dynamic water distribution model is constructed;

[0010] Run the real-time dynamic water distribution model to simulate the real-time dynamic water distribution process of multi-level target channels in the irrigation area.

[0011] In combination with the first aspect, in one implementation, the irrigation priority classification strategy based on important water diversion gates specifically includes the following steps:

[0012] Design a method for dividing irrigation groups based on the priority of important water diversion gates, obtain the priority of important water diversion gates and the upstream and downstream spatial order of all water diversion gates;

[0013] The irrigation order of each diversion gate on the target channel is obtained by combining the priority level and the upstream and downstream spatial order.

[0014] In combination with the first aspect, in one implementation, the priority level of important water diversion gates and the upstream and downstream spatial sequence steps of all water diversion gates are obtained based on the following rules:

[0015] The irrigation order of important water diversion gates on the channel is described by priority level. The smaller the level, the earlier the water distribution order.

[0016] The priority of the channel section is divided based on the important water diversion gates on the target channel as the critical section. The water diversion gates between two critical sections are automatically aggregated into a channel section, and the priority level of this channel section is consistent with the priority level of the important water diversion gates in the lower section.

[0017] In a canal section with the same priority level, the water distribution order of the diversion gates in the canal section is determined according to the spatial order from upstream to downstream;

[0018] When there is no priority information, water is distributed in spatial order from upstream to downstream.

[0019] In combination with the first aspect, in one embodiment, in the steps of setting the dynamic water distribution method of "variable flow, variable duration" based on water balance and flow constraints, the water balance includes water source supply and demand balance, water diversion outlet supply and demand balance and channel water balance.

[0020] In combination with the first aspect, in one embodiment, in the design steps of the "variable flow, variable duration" dynamic water distribution strategy method based on water balance and flow constraints, the flow constraints include the total water volume of the channel, the channel flow and the diversion gate flow constraints.

[0021] In combination with the first aspect, in one implementation, in the database table structure for constructing the real-time dynamic water distribution model for the irrigation area, the database table includes:

[0022] According to the channel characteristics and canal system topology, design the basic attribute table of the irrigation area water inlet gate;

[0023] Design unit water demand results table for given irrigation water demand;

[0024] Design a water distribution plan table for irrigation priority settings;

[0025] Design a dynamic water distribution results table based on the model simulation results;

[0026] In combination with the first aspect, in one implementation, the multi-level channel adaptive real-time dynamic water distribution model is constructed based on basic data, water supply and demand information, irrigation priority classification strategy, dynamic water distribution method and constructed database table structure, specifically including the following steps:

[0027] Determine the smallest water demand unit based on the canal topology of the irrigation area and the actual management scope of the irrigation area;

[0028] Combined with the topological structure of irrigation canal system, the water distribution level of each level of canal system is generated;

[0029] The maximum water distribution level is determined by the user based on the actual business application needs of the irrigation area;

[0030] Combined with the canal topology, the gross irrigation water demand of the diversion gates at all levels of channels is calculated from the fields and the last channel upward step by step;

[0031] According to the irrigation priority classification strategy and the topological structure of the irrigation canal system, determine the irrigation priority of each diversion gate on the target canal of the irrigation area;

[0032] According to the determined minimum water demand unit, the irrigation priority level of each water diversion gate on the target channel and the gross irrigation water demand, the dynamic water distribution strategy of "variable flow and variable duration" is implemented step by step from the water source to the field, and the water distribution volume and irrigation duration of each water diversion gate are counted step by step from the terminal canal system to the water source;

[0033] According to the water demand information of the irrigation area, the topological structure of the irrigation canal system, the water supply information of the given water source and the irrigation priority level of each diversion gate, the configuration of the database table structure is completed and a real-time dynamic water distribution model is constructed.

[0034] In combination with the first aspect, in one implementation, the gross irrigation water demand of the water diversion gates on each level of the channel is calculated by combining the canal topology structure from the field and the last channel upward step by step, as shown in the following formula:

[0035]

[0036] In the formula, For a single diversion gate Total irrigation water requirement for the period, For the The total irrigation water demand corresponding to the level channel is To connect to the water source The total irrigation water demand corresponding to the diversion gate, is the total water demand of the irrigation area, is the irrigation water demand of the water demand unit, For the The first level channel Irrigation water requirement for the period, For the Water diversion gate Irrigation water demand corresponding to the level canal, The number of diversion gates connected to the water source. is the total number of water distribution time periods corresponding to a single water diversion gate, is the total number of channel levels.

[0037] In a second aspect, the present application provides a multi-level channel adaptive real-time dynamic water distribution system for irrigation areas, comprising:

[0038] Basic information acquisition module, used to obtain basic information of irrigation areas and water supply and demand information;

[0039] Irrigation priority level division strategy setting module, used to set the irrigation priority level division strategy of important water diversion gates on multi-level target channels;

[0040] Dynamic water distribution strategy setting module, used to set the "variable flow, variable duration" dynamic water distribution method based on water balance and flow constraints;

[0041] Database construction module, used to construct the database table structure of the real-time dynamic water distribution model of the irrigation area;

[0042] A dynamic water distribution model construction module is connected to the basic information acquisition module, the irrigation priority classification strategy setting module and the dynamic water distribution strategy setting module, and is used to construct a multi-level channel adaptive real-time dynamic water distribution model based on basic data, water supply and demand information, irrigation priority classification strategy, dynamic water distribution method and constructed database table structure;

[0043] The dynamic water distribution model operation module is communicatively connected with the real-time dynamic water distribution model construction module, and is used to operate the real-time dynamic water distribution model to simulate the real-time dynamic water distribution process of the multi-level target channels in the irrigation area.

[0044] In conjunction with the second aspect, in one implementation, the irrigation priority level division strategy setting module includes:

[0045] The level and sequence acquisition unit is used to design a method for dividing irrigation groups based on the priority levels of important water diversion gates, and to obtain the priority levels of important water diversion gates and the upstream and downstream spatial order of all water diversion gates;

[0046] The irrigation sequence acquisition unit is in communication with the level and sequence acquisition unit, and is used to obtain the irrigation sequence of each water diversion gate on the channel by combining the priority level and the upstream and downstream spatial sequence.

[0047] The beneficial effects brought by the technical solution provided by the embodiment of the present application include at least:

[0048] The present application provides a real-time dynamic water distribution method for multi-level channel adaptation in irrigation areas, realizes real-time simulation of the dynamic water distribution process of irrigation in irrigation areas composed of complex irrigation canal networks, adopts a "constant flow, variable duration" water distribution method to meet the actual production needs of irrigation areas; adopts a multi-level channel adaptive algorithm to meet the differentiated requirements of different management levels in irrigation areas; allows users to independently set water distribution plans and give maximum water distribution levels, and can quickly and accurately simulate the water distribution time, flow and allocated water volume of each water diversion gate on the target channel, providing technical support for the scientific and reasonable formulation of dynamic water distribution plans for irrigation areas (especially large irrigation areas), and providing a scientific basis for promoting efficient water use in agriculture. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 A schematic diagram of a flow chart of a method for adaptive real-time dynamic water distribution in a multi-level channel of an irrigation area provided in an embodiment of the present application;

[0050] Figure 2 A schematic diagram of a method for dividing irrigation priority levels of each water diversion gate on an irrigation channel provided in an embodiment of the present application;

[0051] Figure 3 It is a schematic diagram of the canal water distribution level in a specific implementation case;

[0052] Figure 4 This is the topological structure diagram of the Zhanghe River canal system in the specific implementation case;

[0053] Figure 5 This is a diagram of the variable flow and variable duration water distribution process of a branch water inlet gate on the third main canal in a specific implementation case. DETAILED DESCRIPTION

[0054] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0055] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit "first", "second" and "third" to different types.

[0056] In the description of the embodiments of the present application, "exemplary", "for example" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary", "for example" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary", "for example" or "for example" is intended to present related concepts in a specific way.

[0057] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; the “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0058] In some processes described in the embodiments of the present application, multiple operations or steps that appear in a specific order are included, but it should be understood that these operations or steps may not be executed in the order in which they appear in the embodiments of the present application or in parallel, and the sequence number of the operation is only used to distinguish the different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed in sequence or in parallel, and these operations or steps may be combined.

[0059] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0060] First, please refer to Figure 1 The present application provides a method for real-time dynamic water distribution in an irrigation area with multi-level channels, comprising the following steps:

[0061] Step S1, obtaining basic data of the irrigation area and water supply and demand information, wherein the basic data of the irrigation area includes the canal topology structure, etc., and the water supply and demand information includes the water demand of the canal water diversion gate, water source supply, etc.;

[0062] Step S2: setting up irrigation priority classification strategies based on important water diversion gates;

[0063] Step S3: Based on water balance and flow constraint conditions, a dynamic water distribution method of "variable flow and variable duration" is set;

[0064] Step S4, constructing a database table structure of a real-time dynamic water distribution model for an irrigation area;

[0065] Step S5: construct a multi-level channel adaptive real-time dynamic water distribution model based on basic data, water supply and demand information, irrigation priority classification strategy, dynamic water distribution method and constructed database table structure;

[0066] Step S6: Run the real-time dynamic water distribution model to simulate the dynamic water distribution process of the multi-level target channels in the irrigation area.

[0067] This application provides a real-time dynamic water distribution method for multi-level channels in irrigation areas that are adaptive, and realizes real-time simulation of the dynamic water distribution process of irrigation areas composed of complex irrigation canal networks. It provides technical support for the scientific and reasonable formulation of dynamic water distribution plans for canals at all levels in irrigation areas (especially large irrigation areas), and provides a scientific basis for promoting efficient water use in agriculture.

[0068] In one embodiment, the step S1, obtaining basic information of the irrigation area and water supply and demand information, specifically includes the following steps:

[0069] A. Obtain water demand information of the irrigation area, including total water demand and water demand time;

[0070] B. Obtain the canal topology of the complex irrigation canal network in the irrigation area. The irrigation area (especially the large irrigation area) is a complex irrigation canal network, which generally includes multiple levels of canals such as trunk, branch, bucket, farm, and main;

[0071] C. Obtain the water source water conservancy project code, and provide water distribution information such as the water distribution start time and maximum water distribution level.

[0072] In one embodiment, the irrigation district is a complex irrigation canal network, and the canal levels that irrigation district managers at different levels in the irrigation district pay attention to are often different. In the actual water scheduling process of the irrigation district, different types of irrigation districts and different levels of channels in the same irrigation district may adopt different rotation irrigation methods. For example, when water is needed at the same time, the head gates of the main canals directly connected to the water source are generally opened at the same time, the diversion gates on the main canals often use regulating gates to irrigate the diversion sections, and the diversion gates on the agricultural canals often distribute water in a spatial order from upstream to downstream. In order to describe the water distribution situation under different demands in the model, the present application proposes an irrigation priority division strategy, which performs irrigation in order based on the irrigation priority of important diversion gates, and the step S2, the irrigation priority division strategy based on important diversion gates, is set, and specifically includes the following steps:

[0073] Step S21, designing a rotation irrigation group division method based on the priority level of important water diversion gates, and obtaining the priority level of important water diversion gates and the upstream and downstream spatial order of all water diversion gates according to the designed rotation irrigation group division method;

[0074] Step S22: Acquire the irrigation sequence of each water diversion gate on the channel by combining the priority level and the upstream and downstream spatial sequence.

[0075] Based on step S2, this application jointly defines the irrigation priority of each water diversion gate on the target channel through the priority level of important water diversion gates and the upstream and downstream spatial order, so as to realize the definition of different rotation irrigation methods in various irrigation areas and channels at all levels.

[0076] In one embodiment, if Figure 2 As shown, a method for dividing irrigation groups based on the priority of important water diversion gates is designed based on the following rules to obtain the priority and upstream and downstream spatial order in step S21:

[0077] D. As there are many diversion gates on the channel, if all diversion gates are used to divide the priority level of rotation irrigation, the information will be messy and inconvenient to use. Therefore, the priority level of important diversion gates is used to describe the irrigation sequence. The smaller the level, the higher the water distribution sequence;

[0078] E. The irrigation priority level is divided based on the important water diversion gates on the target channel as the critical section. The water diversion gates between two critical sections are automatically aggregated into a group, and their priority level is consistent with the priority level of the important water diversion gates in the lower section;

[0079] F. In the canal section with the same priority level, the water distribution order of the diversion gates in the canal section shall be determined according to the spatial order from upstream to downstream;

[0080] G. When there is no priority information, water is distributed in spatial order from upstream to downstream.

[0081] In one embodiment, the existing channel water distribution model generally adopts a "constant flow, variable duration" water distribution method, which is more suitable for water distribution scheme optimization research, and is often less applicable in the actual irrigation area water scheduling process. In the actual dynamic water distribution process, the actual water distribution flow of the water diversion gate on the channel is not only limited by the design flow of the water diversion gate, but also by the total water inflow of the channel and the sum of the water distribution flow of the other water diversion gates upstream of the water diversion gate, so that the water distribution flow of the water diversion gate cannot remain unchanged. Therefore, this application is based on the principles of water source supply and demand balance, water diversion supply and demand balance and channel water balance, and the total water volume of the channel, channel flow and water diversion gate flow constraints, to form a "variable flow, variable duration" water distribution method to meet the actual dynamic water distribution needs.

[0082] In the step S3, the design of the “variable flow, variable duration” dynamic water distribution method, the “variable flow, variable duration” dynamic water distribution method satisfies the following water balance and flow constraint conditions, the water balance includes the water source supply and demand balance, the water diversion outlet supply and demand balance and the channel water balance, the flow constraint includes the channel total water constraint, the channel flow constraint and the water diversion outlet gate flow constraint, specifically:

[0083] Step S31, water supply and demand balance: when the available water volume of the water source can meet the total irrigation water demand of the irrigation area, the irrigation water demand of the water diversion gates at all levels of channels can be met; when the available water volume of the water source cannot meet the total irrigation water demand of the irrigation area, the available water volume of the water source is allocated according to the supply-demand ratio based on the principle of supply determining demand, as shown in the following formula:

[0084]

[0085] In the formula, is the total irrigation water demand of the irrigation area, in m 3 ; is the amount of water available for irrigation, in m 3 ; is the actual water supply for water source irrigation, in m 3 .

[0086] Step S32: The water supply and demand balance of the water diversion gate is that the total water distribution of a single water diversion gate is equal to the irrigation water volume on the water diversion gate, wherein the irrigation water volume of the water diversion gate is equal to the supply-demand weight ratio multiplied by the irrigation water demand within the irrigation range of the water diversion gate, and the water distribution volume of the water diversion gate is equal to the sum of the different water distribution flows in multiple time periods multiplied by the time period length, as shown in the following formula:

[0087]

[0088] In the formula, is the irrigation water volume of the diversion gate, in m 3 ; The water distribution volume of the water diversion gate, in m 3 ; The irrigation water demand within the irrigation range of the water diversion gate, in m 3 ; is the supply-demand weight ratio, which is equal to 1 when the water source can meet the total irrigation water demand; is the water flow rate of the kth period at the water diversion gate, in m 3 / s; is the length of the k-th water distribution period on the water diversion gate, in seconds; nk is the total number of water distribution periods corresponding to a single water diversion gate, and the water distribution period of the water diversion gate is composed of different water distribution flows.

[0089] Step S33: The water balance of the channel is that the irrigation water volume of the channel inlet gate is equal to the sum of the water distribution volume of each water diversion gate on the channel and the water loss of the channel, as shown in the following formula:

[0090]

[0091] In the formula, is the water supply of the channel inlet gate, in m 3 ; is the amount of water distributed in the channel, in m 3 ; is the water loss of the channel, in m 3 ; is the water flow rate of the channel inlet gate in the kth period, in m 3 / s; is the length of the k-th water distribution period on the water diversion gate, in seconds; nk is the total number of water distribution periods of the channel inlet gate; is the water distribution of the i-th water diversion gate on the channel, in m 3 ; ni is the total number of water diversion gates on the channel.

[0092] Step S34: The total water volume of the channel is constrained to be that the sum of the water volume of each water diversion port on each channel is not greater than the water volume of the water inlet gate of the channel, as shown in the following formula:

[0093]

[0094] In the formula, is the water supply of the channel inlet gate, in m 3 ; is the water distribution of the i-th water diversion gate on the channel, in m 3 ; ni is the total number of water diversion gates on the channel.

[0095] Step S35: The channel flow constraint is that during the water distribution process of each channel, the sum of the water distribution flow of each water diversion port on the channel is not greater than the water distribution flow of the water inlet gate of the channel, as shown in the following formula:

[0096]

[0097] In the formula, is the water distribution flow of the ith water diversion gate on the channel at a certain moment, in m 3 / s; It is the water distribution flow of the channel inlet gate at a certain moment, in m3 / s.

[0098] Step S36: The water distribution flow rate of each water distribution gate is constrained to be no greater than the design flow rate of the water distribution gate, as shown in the following formula:

[0099]

[0100] In the formula, is the design flow rate of the diversion gate, m 3 / s; is the water distribution flow rate of the water diversion gate, m 3 / s.

[0101] In one embodiment, for a complex irrigation channel network composed of multiple levels of channels such as main, branch, bucket, farm, and main (large irrigation areas may even add main, branch, and branch, etc.), a data base such as irrigation area basic data, business application data, and model input and output is constructed through a reasonable database table structure design. In the step S4, in which the database table structure of the irrigation area real-time dynamic water distribution model is constructed, the database table structure includes a basic attribute table of water inlet gates in the irrigation area, a unit water demand results table, a water distribution plan setting table, and a dynamic water distribution results table, as shown in Tables 1 to 4:

[0102] Table 1 Basic attributes of water inlet gates in irrigation areas

[0103]

[0104] The fields in the table structure of Table 1 are described as follows:

[0105] Channel Code: Channel code;

[0106] Channel name: the channel name corresponding to the channel code;

[0107] Parent channel code: the parent channel code of the channel;

[0108] Parent channel name: the channel name corresponding to the parent channel code;

[0109] Diversion port code: the diversion port code where the channel connects to the upper channel, usually the gate code of the channel inlet gate;

[0110] Water outlet name: the water outlet name corresponding to the water outlet code;

[0111] Section starting distance: the starting distance of the channel section where the water diversion outlet is located, in meters;

[0112] Design flow rate: the maximum flow capacity of the water diversion port, in m 3 / s;

[0113] Channel level: the channel level corresponding to the channel code;

[0114] Section pile number: The pile number corresponding to the starting distance of the section.

[0115] Table 2 Unit water demand results table

[0116]

[0117] The fields in the table structure of Table 2 are described as follows:

[0118] Starting time: the starting time of the current time step;

[0119] End time: the end time of the current time step;

[0120] Superior channel code: the code of the superior channel, such as the superior channel code of the first trunk canal, the west trunk canal and the main trunk canal is the Zhanghe reservoir code, and the superior channel code of the second trunk canal, the third trunk canal, the fourth trunk canal and other superior channels is the main trunk canal channel code;

[0121] Parent channel name: the channel name corresponding to the parent channel code;

[0122] Channel code: the channel code corresponding to the diversion outlet on the upper channel, such as the third main channel corresponding to the third main channel water inlet gate on the main canal;

[0123] Channel name: the channel name corresponding to the channel code;

[0124] Water diversion code: the water diversion code connecting the channel with the upper channel, for example, if the upper channel is called a main channel and the channel is called Jiangjun branch channel, the water diversion name is called Jiangjun branch channel culvert;

[0125] Water outlet name: the water outlet name corresponding to the water outlet code;

[0126] Gross irrigation water volume: The amount of irrigation water required from external water sources, in m 3 .

[0127] Table 3 Water distribution scheme setting table

[0128]

[0129] The fields in the table structure of Table 3 are described as follows:

[0130] Scheme code: The code corresponding to the set water distribution scheme is unique;

[0131] Parent channel code: consistent with SP_CHAN_CODE in the unit water demand table;

[0132] Parent channel name: the channel name corresponding to the parent channel code;

[0133] Channel code: consistent with CHAN_CODE in the unit water demand table;

[0134] Channel name: the channel name corresponding to the channel code;

[0135] Priority: 1~N, the smaller the priority data, the earlier the irrigation demand will be met;

[0136] Section pile number: the section pile number on the upper channel where the channel inlet gate is located;

[0137] Starting distance: the distance corresponding to the section pile number, in m.

[0138] Table 4 Dynamic water distribution results table

[0139]

[0140] The fields in Table 4 are described as follows:

[0141] Scheme code: The code corresponding to the set water distribution scheme is unique;

[0142] Time step: the number of steps in the calculation time;

[0143] Parent channel code: consistent with SP_CHAN_CODE in the unit water demand table;

[0144] Parent channel name: the name corresponding to the parent channel code;

[0145] Channel code: consistent with CHAN_CODE in the unit water demand table;

[0146] Channel name: the name corresponding to the channel code;

[0147] Section start distance: the distance between the water diversion section and the start section of the upper channel, in meters;

[0148] Irrigation start time: start irrigation time;

[0149] Irrigation end time: end irrigation time;

[0150] Irrigation flow: The flow at the canal outlet at the corresponding start and end time, in m 3 / s;

[0151] Remaining irrigation water requirement: The net irrigation water requirement remaining after the irrigation is completed, in m 3 .

[0152] Based on step S4, this application designs a reasonable database table structure for the irrigation district basic data, business application data and model input and output data, and constructs a dynamic water distribution model data base.

[0153] In one embodiment, the step S5, constructing a multi-level channel adaptive real-time dynamic water distribution model according to basic data, water supply and demand information, irrigation priority classification strategy, dynamic water distribution method and constructed database table structure, specifically includes the following steps:

[0154] Step S51, determining the smallest water demand unit according to the canal topology of the irrigation area and the actual management scope of the irrigation area;

[0155] Step S52, combining the canal topology of the irrigation area, generating the water distribution level of the water diversion gates at each level of the canal system;

[0156] Step S53: The user determines the maximum water distribution level according to the actual business application requirements of the irrigation area;

[0157] Step S54, in combination with the canal topology, the gross irrigation water demand of the diversion gates on each level of the canal is counted from the field and the end channel step by step upward. Specifically, in the irrigation area water management system, the irrigation range of the corresponding diversion gate on the administrative area (the smallest can be at the village level) is used as the water demand unit to report the irrigation water demand, automatically read or manually enter the gross irrigation water demand of each water demand unit, and finally obtain the gross irrigation water demand of the diversion gates on each level of the canal. This application combines the canal topology of the irrigation area, and counts the gross irrigation water demand of the diversion gates on each level of the canal from the field to the water source reservoir. The specific calculation formula is as follows:

[0158]

[0159] In the formula, For a single diversion gate Total irrigation water requirement for the period, For the The total irrigation water demand corresponding to the j-th level channel (i.e. the sum of the irrigation water demand of the j-th level channel at each time period), To connect to the water source The total irrigation water demand corresponding to the diversion gate, is the total water demand of the irrigation area, is the irrigation water demand of the water demand unit, For the The first level channel Irrigation water requirement for the period, For the Water diversion gate Irrigation water demand corresponding to the level canal, The number of diversion gates connected to the water source. is the total number of water distribution time periods corresponding to a single water diversion gate, is the total number of channel levels.

[0160] Step S55: Determine the irrigation priority of each water diversion gate on the target channel of the irrigation area according to the irrigation priority classification strategy and the topological structure of the irrigation area canal system; specifically, the irrigation priority level is different from the channel level of the canal system trunk, branch, bucket, agricultural, and gross, such as Figure 3 As shown, starting from the water distribution of the water source reservoir, the water is increased step by step downwards: water distribution to the first main canal inlet gate, the second main canal inlet gate, etc. is the first level, water distribution to each diversion outlet on the first main canal and the second main canal (such as the first branch canal inlet gate, #1 main canal inlet gate) is the second level, water distribution to each diversion outlet on the first branch canal (such as the first branch canal inlet gate) is the third level, water distribution to the diversion outlet on the branch canal is the fourth level, and so on until it reaches the field.

[0161] Step S56, according to the determined minimum water demand unit, the irrigation priority level of each water diversion gate on the target channel and the gross irrigation water demand, the dynamic water distribution strategy of "variable flow, variable duration" is implemented step by step from the water source to the field, and the water distribution volume and irrigation duration of each water diversion gate are counted step by step from the last canal system to the water source; specifically, according to the required maximum water distribution level determined by the user, the irrigation water demand of the water diversion gates on the target channels at all levels is obtained from the last channel upward, specifically, the water distribution algorithm adapted to the canal systems of different levels is adopted; from the water source to the field, the dynamic water distribution strategy of "variable flow, variable duration" is implemented step by step downward (from top to bottom), and then the water distribution volume and irrigation duration are counted step by step from the last canal system to the water source (from bottom to top);

[0162] Step S57: construct a database table and complete the database configuration according to the irrigation area water demand information, the irrigation area canal topology, the given water source water supply information and the obtained irrigation priority level of each water diversion gate, and construct a multi-level channel adaptive real-time dynamic water distribution model.

[0163] This application proposes a multi-level channel adaptive water distribution algorithm, which combines the irrigation area canal topology and the given maximum water distribution level to determine the target channels at each level, and adopts a "top-down" method to achieve dynamic water distribution step by step from the water source to the field, and a "bottom-to-top" method to achieve water volume statistics step by step from the terminal canal to the water source reservoir.

[0164] An adaptive real-time dynamic water distribution model for multi-level channels in irrigation areas is constructed by determining water demand units, entering water demand data, determining water distribution levels, giving water distribution information, setting water distribution plans, and building and configuring databases.

[0165] Based on step S6, for the irrigation area to be simulated, a real-time dynamic water distribution model constructed in step S5 is constructed. By running the model, the dynamic water distribution process of the water diversion gates on the target channels at all levels in the irrigation area is simulated. The optimal channel water distribution plan can be generated by setting up comparative analysis of multiple plans.

[0166] In a specific embodiment, the present application provides a method for adaptive real-time dynamic water distribution in a multi-level channel of an irrigation area, comprising the following steps:

[0167] Step 1: Research the regional situation

[0168] The Zhanghe Irrigation District has a designed irrigation area of ​​2.6052 million mu (large irrigation district), which is the largest irrigation district in Hubei Province. It has formed an irrigation system that combines large, medium, small and micro irrigation with the Zhanghe Reservoir as the backbone, medium and small reservoirs and ponds as the basis, and electric irrigation stations as supplements, and storage, diversion and lifting are coordinated. The Zhanghe Irrigation District is located between 122°~123° east longitude and 30°~31° north latitude in the central part of Hubei Province. The irrigation district is bordered by the Han River in the east, the Ju River in the west, the Changhu Lake in the south, and Yicheng in the north. It spans 7 counties and districts in Dongbao District, Zhanghe New District, Shayang County, Duodao District, Zhongxiang City, Jingzhou District and Dangyang City in the three cities of Jingmen, Jingzhou and Yichang.

[0169] The topological structure of the canal system in Zhanghe Irrigation Area is shown in the figure below. Figure 4 As shown in the figure, the canals are divided into nine levels, namely, main trunk, trunk, branch trunk, branch trunk, branch, branch, bucket, agricultural and small canals. There are 13,990 canals in the irrigation area with a total length of 7,167.56 km. The main trunk, west trunk and first trunk are respectively diverted from the Zhanghe Reservoir by Yandun Gate, Linjiagang Gate and Xujiaxiwan Gate, the second trunk is diverted from the head of the main trunk, and the third and fourth trunks are diverted from the tail of the main trunk. There are 9 trunks in the backbone canal of the Zhanghe Irrigation Area, with a length of 420.29 km; there are 122 branch trunks, branch trunks, branch canals and reservoir pump station canals, with a total length of 1,330.176 km.

[0170] Step 2: Build the model

[0171] Step 21: Determine water demand units

[0172] According to the actual situation of Zhanghe Irrigation District, the main management objects of Zhanghe Irrigation District Management Organization are: 1 main trunk (i.e., main canal) and 5 trunks (including West Main Canal, First Main Canal, Second Main Canal, Third Main Canal, Fourth Main Canal), as well as the high-efficiency water-saving demonstration field area (located within the irrigation range of the Third Main Canal, Third Main Canal, and Hongmiao Branch Canal). This example constructs a real-time dynamic water distribution model for Zhanghe Irrigation District to simulate the water distribution process of the Zhanghe Reservoir to the main canal and each water diversion gate on the five trunks and the high-efficiency water-saving demonstration field. Therefore, the water demand units corresponding to Zhanghe Reservoir include three water inlet gates, namely West Main Canal, First Main Canal, and Main Canal, 82 West Main Canal, 124 First Main Canal, 24 Main Canal, 238 Second Main Canal, 103 Third Main Canal, 100 Fourth Main Canal, 100 Third Main Canal, and Hongmiao Branch Canal, as shown in Table 5.

[0173] Table 5 Water demand unit and water distribution level results table

[0174]

[0175] Step 22: Determine water distribution level

[0176] In this example, the main water distribution process includes the water distribution process from Zhanghe Reservoir to each water diversion gate on the main canal, west canal, first canal, second canal, third canal, and fourth canal, as well as the water distribution process from Zhanghe Reservoir to the demonstration field via the main canal, third canal, third canal, Hongmiao branch canal, and minor canal. Therefore, the water distribution levels involved in this embodiment are divided into:

[0177] Level 1: water distribution process from Zhanghe Reservoir to the west main canal, the first main canal and the head gate of the main canal;

[0178] The second level: the water distribution process of the first main canal to 124 diversion outlets including Jiaodong 1# culvert (Jiaodong 1# culvert primary channel inlet gate), 1# Nongqu culvert (1# Nongqu inlet gate), Zhuchong 1# culvert (Zhuchong 1# culvert primary channel inlet gate) etc.; the water distribution process of the west main canal to 82 diversion outlets including Sanhua 1# culvert (Sanhua 1# culvert primary channel inlet gate), Guangming 1# culvert (Guangming 1# culvert primary channel inlet gate), Bajingpo 1# culvert (Bajingpo 1# culvert primary channel inlet gate) etc.; the water distribution process of the main canal to 24 diversion outlets including the Second Main Channel Inlet Gate, the Third Main Channel Inlet Gate, the Fourth Main Channel Inlet Gate, the Yizhiqu Inlet Gate etc.

[0179] Level 3: The water distribution process of the Second Main Canal to 238 water diversion outlets including the 1# culvert gate of the Sanjie section main canal (the first branch water inlet gate of the Second Main Canal), the 2# culvert gate of the Sanjie section main canal (the fifth branch water inlet gate of the Second Main Canal), and the 1# culvert gate of the Zhouji main canal (the 1# culvert gate of the Second Main Canal Maoqu water inlet gate); the water distribution process of the Third Main Canal to 103 water diversion outlets including the water inlet gate of the Third Main Canal and the 51# culvert gate of the Third Main Canal (the water inlet gate of the Dengchong branch canal); the water distribution process of the Fourth Main Canal to 19 water diversion outlets including the first branch water inlet gate of the Fourth Main Canal and the water inlet gate of the Geji branch canal;

[0180] Level 4: water distribution process from Sangan Canal Sanfen to Sangan Canal Sanfen 12# culvert (Jiulong Branch Canal water inlet), Sangan Canal Sanfen 18# culvert (Sangan Canal Hongmiao Branch Canal water inlet), Sangan Canal Sanfen 3# culvert (Sangan Canal 3# culvert Maoqu water inlet) and other 100 water diversion outlets;

[0181] Fifth level: The water distribution process from Hongmiao branch canal to 93 water diversion outlets including Hongmiao branch canal 1# culvert (Hongmiao branch canal 1# culvert main canal water inlet gate), Hongmiao branch canal 4# culvert (Hongmiao branch canal 4# culvert main canal water inlet gate), and directly reaches the fields through main canals.

[0182] Level 6: Hongmiao branch canal 1#~92# culverts and sluices directly distribute water to the fields.

[0183] Step 23: Given water distribution information

[0184] Given a water distribution plan name (such as water distribution test plan 1), the system automatically generates a plan code (the plan code is required to be unique), and at the same time, determines the water distribution start time under the given plan, the irrigation water supply of the water source (i.e., Zhanghe Reservoir) (since the water volume of Zhanghe Reservoir is relatively abundant, the default water supply is equal to the total gross irrigation water demand), the maximum water distribution level (the terminal channel is Hongmiao branch channel, so the maximum water distribution level is 6), etc.

[0185] Step 24: Enter water demand data

[0186] For the water demand units determined in the above steps, the management unit shall count the gross irrigation water demand in each water demand unit and enter it, or automatically read it from the reporting subsystem of the irrigation district management system. For details, see 6.

[0187] Table 6 Water demand unit irrigation water demand information entry table

[0188]

[0189] Note: Since there are many water demand units in the example, this table only gives a few data as a sample table.

[0190] Step 25: Set up water distribution plan

[0191] Since there are many diversion gates on each level of channels in the irrigation area, an irrigation priority division strategy is adopted. Based on the irrigation priority levels of each diversion gate on each level of target channels, irrigation is carried out in sequence to set up rotation irrigation for each diversion gate on each level of target channels. See Table 7 for details.

[0192] Table 7 Rotational irrigation setting plan for each diversion gate on each level of canal system

[0193]

[0194]

[0195] Through the setting of water distribution plan, the water distribution order of each water outlet on the three main canals determined by model calculation is shown in Table 8.

[0196] Table 8 Water distribution sequence of each water diversion gate on the three main canals

[0197]

[0198] Step 26: Run the real-time dynamic water distribution model

[0199] After confirming and inputting the above information, run the real-time dynamic water distribution model to obtain the dynamic water distribution process of the canal system under the corresponding scheme.

[0200] Step 3: Generate canal water distribution plan

[0201] According to the simulation results of the real-time dynamic water distribution model of the irrigation area, the water distribution results of the target channels at all levels are obtained. The water distribution results of Zhanghe Reservoir are shown in Table 9, the water distribution results of the main canal are shown in Table 10, the water distribution results of the third canal are shown in Table 11, the water distribution results of the third canal and the third branch are shown in Table 12, and the water distribution results of the third branch of the third canal and the Hongmiao branch are shown in Table 13.

[0202] like Figure 5 This is the irrigation process of the three main canals and one branch canal inlet gate, and the design flow of the inlet gate is 8.4m 3 / s constraint, and at the same time constrained by the irrigation flow of its upstream diversion outlet and the total water inflow of the three main canals, the irrigation process of the three main canals and the first branch water inlet gate presents variable flow and variable duration. For the three main canals and the first branch water inlet gate, the irrigation flow of the first stage is 3.09m 3 / s, the irrigation lasted for 3.09 hours. After the first stage of irrigation, the remaining irrigation water requirement was 10548597m 3 ; The irrigation flow rate of the second stage is 3.49m 3 / s, the irrigation lasted for 0.16 hours, and after the second stage of irrigation, the remaining irrigation water requirement was 10546572m 3 ; The irrigation flow rate of the third stage is 5.09m 3 / s, the irrigation lasted for 5.91 hours, and after the third stage of irrigation, the remaining irrigation water requirement was 10438357m 3 ; The irrigation flow rate of the fourth stage is 5.39m 3 / s, the irrigation lasted for 3.96 hours, and after the fourth stage of irrigation, the remaining irrigation water requirement was 10361486m 3 ; The irrigation flow rate of the fifth stage is 8.4m 3 / s, the irrigation lasted for 342.64 hours, and after the fifth stage of irrigation, the remaining irrigation water requirement was 0m 3 .

[0203] Table 9 Zhanghe Reservoir water distribution results

[0204]

[0205] Table 10 Main canal water distribution results

[0206]

[0207] Table 11 Water distribution results of three main canals

[0208]

[0209]

[0210] Table 12 Water distribution results of three main canals and three main branches

[0211]

[0212] Table 13 Water distribution results of three main canals, three main canals and Hongmiao branch canals

[0213]

[0214]

[0215]

[0216]

[0217] In a second aspect, the present application provides a multi-level channel adaptive real-time dynamic water distribution system for irrigation areas, comprising:

[0218] Basic information acquisition module, used to obtain basic information of irrigation areas and water supply and demand information;

[0219] Irrigation priority level division strategy setting module, used to set the irrigation priority level division strategy of important water diversion gates on multi-level target channels;

[0220] Dynamic water distribution strategy setting module, used to set the "variable flow, variable duration" dynamic water distribution method based on water balance and flow constraints;

[0221] Database construction module, used to construct database tables of real-time dynamic water distribution model of irrigation areas;

[0222] A dynamic water distribution model construction module is connected to the basic information acquisition module, the irrigation priority classification strategy setting module and the dynamic water distribution module, and is used to construct a multi-level channel adaptive real-time dynamic water distribution model based on basic data, water supply and demand information, irrigation priority classification strategy, dynamic water distribution method and constructed database table structure;

[0223] The dynamic water distribution model operation module is communicatively connected with the real-time dynamic water distribution model construction module, and is used to operate the real-time dynamic water distribution model to simulate the dynamic water distribution process of the multi-level target channels in the irrigation area.

[0224] In one embodiment, the irrigation priority classification strategy setting module includes:

[0225] The level and sequence acquisition unit is used to design a method for dividing irrigation groups based on the priority levels of important water diversion gates, and to obtain the priority levels of important water diversion gates and the upstream and downstream spatial order of all water diversion gates;

[0226] The irrigation sequence acquisition unit is in communication with the level and sequence acquisition unit, and is used to obtain the irrigation sequence of each water diversion gate on the channel by integrating the priority level and the upstream and downstream spatial sequence.

[0227] Among them, the functional implementation of each module in the above-mentioned irrigation area multi-level channel adaptive real-time dynamic water distribution system corresponds to the steps in the above-mentioned irrigation area multi-level channel adaptive real-time dynamic water distribution method embodiment, and its functions and implementation process will not be repeated here one by one.

[0228] On the third aspect, an embodiment of the present application provides a real-time dynamic water distribution device that is adaptive to multiple channels in an irrigation area. The real-time dynamic water distribution device that is adaptive to multiple channels in an irrigation area can be a personal computer (PC), a laptop computer, a server, or other device with data processing capabilities.

[0229] The communication interface includes input / output (I / O) interface, physical interface and logical interface, etc., which are used to realize the interconnection of devices inside the real-time dynamic water distribution equipment of the irrigation area multi-level channel self-adaptation, and the interface used to realize the interconnection of the real-time dynamic water distribution equipment of the irrigation area multi-level channel self-adaptation with other devices (such as other computing devices or user devices). The physical interface can be an Ethernet interface, a fiber optic interface, an ATM interface, etc.; the user device can be a display (Display), a keyboard (Keyboard), etc.

[0230] The memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0231] The processor may be a general-purpose processor, which may call the real-time dynamic water distribution program for irrigation district multi-level channel self-adaptation stored in the memory, and execute the real-time dynamic water distribution method for irrigation district multi-level channel self-adaptation provided in the embodiment of the present application. For example, the general-purpose processor may be a central processing unit (CPU). The method executed when the real-time dynamic water distribution program for irrigation district channel self-adaptation is called may refer to the various embodiments of the real-time dynamic water distribution method for irrigation district multi-level channel self-adaptation of the present application, which will not be repeated here.

[0232] In a fourth aspect, an embodiment of the present application also provides a readable storage medium.

[0233] The readable storage medium of the present application stores a real-time dynamic water distribution program for multi-level channel self-adaptation in irrigation areas, wherein when the real-time dynamic water distribution program for multi-level channel self-adaptation in irrigation areas is executed by a processor, the steps of the real-time dynamic water distribution method for multi-level channel self-adaptation in irrigation areas as described above are implemented.

[0234] Among them, the method implemented when the real-time dynamic water distribution program for multi-level channels in the irrigation area is executed can refer to the various embodiments of the real-time dynamic water distribution method for multi-level channels in the irrigation area of ​​the present application, and will not be repeated here.

[0235] It should be noted that the serial numbers of the above-mentioned embodiments of the present application are only for description and do not represent the advantages or disadvantages of the embodiments.

[0236] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, disk, CD) as described above, and includes a number of instructions for a terminal device to execute the methods described in each embodiment of the present application.

[0237] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A real-time dynamic water distribution method for multi-level channels in irrigation areas, characterized in that: The following steps are involved: Obtain basic data of irrigation areas and water supply and demand information; Set up irrigation priority division strategies for important diversion gates on multi-level target channels; The irrigation priority division strategy for setting important water diversion gates on the multi-level target channel specifically includes the following steps: Design a method for dividing irrigation groups based on the priority of important water diversion gates, obtain the priority of important water diversion gates and the upstream and downstream spatial order of all water diversion gates; Combine the priority level and the upstream and downstream spatial order to obtain the irrigation order of each diversion gate on the channel; The design is based on the priority level of important water diversion gates to divide the rotation irrigation group method, obtain the priority level of important water diversion gates and the upstream and downstream spatial sequence steps of all water diversion gates, and is implemented based on the following rules: The irrigation order of important water diversion gates on the channel is described by priority level. The smaller the level, the earlier the water distribution order. The priority of the channel section is divided based on the important water diversion gates on the target channel as the critical section. The water diversion gates between two critical sections are automatically aggregated into a channel section, and the priority level of this channel section is consistent with the priority level of the important water diversion gates in the lower section. In a canal section with the same priority level, the water distribution order of the diversion gates in the canal section is determined according to the spatial order from upstream to downstream; When there is no priority information, water is distributed in spatial order from upstream to downstream; Based on water balance and flow constraints, a dynamic water distribution method of "variable flow and variable duration" is set; the database table structure of the real-time dynamic water distribution model of the irrigation area is constructed; In the step of constructing a database table structure of a real-time dynamic water distribution model for an irrigation area, the database table structure includes: According to the characteristics of the irrigation area and the canal topology, the basic attribute table of the irrigation area water inlet gate is designed; Design unit water demand results table for irrigation water demand reporting; Design a water distribution plan table for irrigation priority settings; Design a dynamic water distribution results table based on the model simulation results; Based on basic data, water supply and demand information, irrigation priority classification strategy, dynamic water distribution method and constructed database table structure, a multi-level channel adaptive real-time dynamic water distribution model is constructed; The method of constructing a multi-level channel adaptive real-time dynamic water distribution model based on basic data, water supply and demand information, irrigation priority classification strategy, dynamic water distribution method and constructed database table structure specifically includes the following steps: Determine the smallest water demand unit based on the canal topology of the irrigation area and the actual management scope of the irrigation area; Combined with the topological structure of irrigation canal system, the water distribution level of each level of canal system is generated; The maximum water distribution level is determined by the user based on the actual business application needs of the irrigation area; Combined with the canal topology, the gross irrigation water demand of the diversion gates at all levels of channels is calculated from the fields and the last channel upward step by step; According to the irrigation priority classification strategy and the topological structure of the irrigation canal system, determine the irrigation priority of each diversion gate on the target canal of the irrigation area; According to the determined minimum water demand unit, the irrigation priority level of each water diversion gate on the target channel and the gross irrigation water demand, the dynamic water distribution strategy of "variable flow and variable duration" is implemented step by step from the water source to the terminal canal system, and the water distribution volume and irrigation duration of each water diversion gate are counted step by step from the terminal canal system to the water source; According to the irrigation area water demand information, irrigation area canal topology, given water source water supply information and the obtained irrigation priority levels, complete the configuration of the database table structure and build a real-time dynamic water distribution model; Run the real-time dynamic water distribution model to simulate the real-time dynamic water distribution process of multi-level target channels in the irrigation area.

2. The method for adaptive real-time dynamic water distribution in irrigation areas according to claim 1, characterized in that: In the steps of setting the dynamic water distribution method of "variable flow, variable duration" based on water balance and flow constraints, the water balance includes water source supply and demand balance, water diversion outlet supply and demand balance and channel water balance.

3. The method for adaptive real-time dynamic water distribution in irrigation areas according to claim 1, characterized in that: In the steps of setting the "variable flow, variable duration" dynamic water distribution method based on water balance and flow constraint conditions, the flow constraint includes the total water volume of the channel, the channel flow and the water diversion gate flow constraint.

4. The method for adaptive real-time dynamic water distribution in irrigation areas with multi-level channels as claimed in claim 1, characterized in that: In combination with the canal topology, the gross irrigation water demand of the water diversion gates at each level of the canal is calculated step by step from the field to the end of the canal, as shown in the following formula: In the formula, For a single diversion gate Total irrigation water requirement for the period, For the The total irrigation water demand corresponding to the level channel is To connect to the water source The total irrigation water demand corresponding to the diversion gate, is the total water demand of the irrigation area, is the irrigation water demand of the water demand unit, For the The first level channel Irrigation water requirement for the period, For the Water diversion gate Irrigation water demand corresponding to the level channel, The number of water diversion gates connected to the water source. is the total number of water distribution time periods corresponding to a single water diversion gate, is the total number of channel levels.

5. A system using the method for adaptive real-time dynamic water distribution in irrigation areas according to any one of claims 1 to 4, characterized in that: include: Basic information acquisition module, used to obtain basic information of irrigation areas and water supply and demand information; Irrigation priority level division strategy setting module, used to set the irrigation priority level division strategy of important water diversion gates on multi-level target channels; Dynamic water distribution strategy setting module, used to set the "variable flow, variable duration" dynamic water distribution method based on water balance and flow constraints; Database construction module, used to construct the database table structure of the real-time dynamic water distribution model of the irrigation area; A dynamic water distribution model construction module is connected to the basic information acquisition module, the irrigation priority classification strategy setting module and the dynamic water distribution strategy setting module, and is used to construct a multi-level channel adaptive real-time dynamic water distribution model based on basic data, water supply and demand information, irrigation priority classification strategy, dynamic water distribution method and constructed database table structure; The dynamic water distribution model operation module is connected to the dynamic water distribution model construction module for running the real-time dynamic water distribution model to simulate the real-time dynamic water distribution process of the multi-level target channels in the irrigation area.

6. The system according to claim 5, characterized in that The irrigation priority classification strategy setting module includes: The level and sequence acquisition unit is used to design a method for dividing irrigation groups based on the priority levels of important water diversion gates, and to obtain the priority levels of important water diversion gates and the upstream and downstream spatial order of all water diversion gates; The irrigation sequence acquisition unit is in communication with the level and sequence acquisition unit, and is used to obtain the irrigation sequence of each water diversion gate on the channel by combining the priority level and the upstream and downstream spatial sequence.

Images