A river ecological flow control method and system based on agricultural irrigation

Abstract

The present application discloses a river ecological flow control method and system based on agricultural irrigation. The scheme obtains farmland irrigation data of the river to be controlled; simulates the hydrological process of the river to be controlled based on the farmland irrigation data to obtain a hydrological model; simulates the rent-seeking behavior of farmers in the river to be controlled to obtain a social model, and couples the social model with the hydrological model to obtain a coupling model; analyzes the flow impact of the river to be controlled based on the coupling model to obtain a first impact relationship; controls the irrigation efficiency based on the first impact relationship, thereby controlling the ecological flow of the river to be controlled. The embodiment of the present application can clarify the relationship between irrigation efficiency control and ecological flow guarantee goals, improve the efficiency of river ecological flow control, and can be widely used in the field of river environmental protection technology.

Description

Technical Field

[0001] The present application relates to the technical field of river environmental protection, and in particular to a river ecological flow control method and system based on agricultural irrigation. Background Art

[0002] Agricultural irrigation is an important part of water use for economic and social development. People improve the efficiency of river water resources by developing agricultural water-saving irrigation technology. However, a large amount of agricultural irrigation water affects the natural hydrological cycle of the basin and changes the natural ecological flow process of the river. In order to protect the ecological flow of the river, relevant technologies have proposed corresponding control measures from the perspective of strengthening agricultural water-saving irrigation. However, the existence of the irrigation efficiency paradox increases the uncertainty of ecological flow protection measures, resulting in agricultural water consumption not necessarily decreasing with the improvement of irrigation efficiency, which affects the control efficiency of ecological flow.

[0003] In summary, the technical problems existing in the relevant technologies need to be improved. Summary of the invention

[0004] The main purpose of the embodiments of the present application is to propose a river ecological flow control method and system based on agricultural irrigation, which can improve the efficiency of river ecological flow control.

[0005] To achieve the above objectives, one aspect of an embodiment of the present application proposes a river ecological flow control method based on agricultural irrigation, the method comprising:

[0006] Obtain farmland irrigation data for rivers to be controlled;

[0007] Performing hydrological process simulation processing on the river to be controlled according to the farmland irrigation data to obtain a hydrological model;

[0008] Simulating the rent-seeking behavior of farmers on the river to be controlled to obtain a social model, and coupling the social model with the hydrological model to obtain a coupled model;

[0009] Performing flow impact analysis on the river to be controlled according to the social model to obtain a first impact relationship, where the first impact relationship is a relationship between irrigation efficiency and ecological flow control ratio;

[0010] The irrigation efficiency is controlled and processed according to the ecological flow control target through the first influence relationship, so as to control the ecological flow of the river to be controlled.

[0011] In some embodiments, the hydrological process simulation processing of the river to be controlled based on the farmland irrigation data to obtain a hydrological model includes the following steps:

[0012] Performing hydrological process simulation on the river to be controlled to obtain the amount of water returned from farmland;

[0013] The water volume change rate of the farmland water withdrawal is calculated and processed according to the irrigation efficiency and the water withdrawal coefficient to obtain a hydrological model.

[0014] In some embodiments, the process of simulating the rent-seeking behavior of farmers on the river to be controlled to obtain a social model, and coupling the social model with the hydrological model to obtain a coupled model includes the following steps:

[0015] The rent-seeking behavior of farmers is simulated according to the sensitive parameters of rent-seeking behavior to obtain the social model;

[0016] The social model and the hydrological model are coupled to obtain a coupled model.

[0017] In some embodiments, performing flow impact analysis on the river to be controlled according to the coupling model to obtain a first impact relationship includes the following steps:

[0018] Performing agricultural irrigation simulation processing on the river to be controlled to obtain the river flow after the influence of agricultural irrigation;

[0019] Performing simulation analysis on the river flow after the agricultural irrigation influence according to the coupling model to obtain a second influence relationship, wherein the second influence relationship is a relationship between the irrigation efficiency and the river flow after the agricultural irrigation influence;

[0020] Determine the ecological flow control target according to the ecological flow control ratio;

[0021] The second impact relationship is jointly analyzed and processed according to the ecological flow control target to obtain the first impact relationship.

[0022] In some embodiments, simulating and analyzing the river flow affected by the agricultural irrigation according to the coupling model to obtain the second impact relationship includes the following steps:

[0023] Performing dynamic simulation processing on the drainage flow rate according to the coupling model to obtain a third influence relationship, wherein the third influence relationship is the influence relationship between the irrigation efficiency and the drainage flow rate;

[0024] The river flow affected by agricultural irrigation is analyzed and processed according to the third influence relationship to obtain a second influence relationship.

[0025] In some embodiments, determining the ecological flow control target according to the ecological flow control ratio includes the following steps:

[0026] Obtain river flow before agricultural irrigation impact and set ecological flow control ratio;

[0027] The ecological flow control ratio is multiplied by the river flow before the impact of agricultural irrigation to obtain an ecological flow control target, so that the river flow after the impact of agricultural irrigation is controlled according to the ecological flow control target.

[0028] In some embodiments, the step of performing a joint analysis on the second impact relationship according to the ecological flow control target to obtain a first impact relationship includes the following steps:

[0029] Obtain ecological flow control targets;

[0030] The ecological flow control target is combined with the hydrological model and the second impact relationship to perform a joint derivation process to obtain a first impact relationship.

[0031] To achieve the above objectives, another aspect of the embodiment of the present application provides a river ecological flow control system based on agricultural irrigation, the system comprising:

[0032] The first module is used to obtain farmland irrigation data of the rivers to be controlled;

[0033] The second module is used to simulate the hydrological process of the river to be controlled according to the farmland irrigation data to obtain a hydrological model;

[0034] The third module is used to simulate the rent-seeking behavior of farmers in the river to be controlled to obtain a social model, and couple the social model with the hydrological model to obtain a coupled model;

[0035] The fourth module is used to perform flow impact analysis on the river to be controlled according to the coupling model to obtain a first impact relationship, where the first impact relationship is a relationship between irrigation efficiency and ecological flow control ratio;

[0036] The fifth module is used to control the irrigation efficiency through the first influencing relationship according to the ecological flow control target, so as to control the ecological flow of the river to be controlled.

[0037] To achieve the above-mentioned purpose, another aspect of an embodiment of the present application provides an electronic device, the electronic device comprising a memory and a processor, the memory storing a computer program, and the processor implementing the above-mentioned method when executing the computer program.

[0038] To achieve the above objective, another aspect of an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method described above is implemented.

[0039] The embodiments of the present application include at least the following beneficial effects: The present application provides a method and system for controlling the ecological flow of a river based on agricultural irrigation. The scheme obtains farmland irrigation data of the river to be controlled; simulates the hydrological process of the river to be controlled based on the farmland irrigation data to obtain a hydrological model; simulates the rent-seeking behavior of farmers in the river to be controlled to obtain a social model, and couples the social model with the hydrological model to obtain a coupling model, which can further consider the impact of farmers' rent-seeking behavior on the hydrological process on the basis of considering the changes in the hydrological process, and can more comprehensively describe the water cycle process. The scheme also performs flow impact analysis on the river to be controlled based on the coupling model to obtain a first impact relationship; controls the irrigation efficiency based on the first impact relationship, thereby controlling the ecological flow of the river to be controlled, and can clarify the relationship between irrigation efficiency control and ecological flow guarantee targets, thereby improving the efficiency of river ecological flow control. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a flow chart of a river ecological flow control method based on agricultural irrigation provided in an embodiment of the present application;

[0041] Figure 2 This is a schematic diagram of the impact of different rent-seeking behavior sensitive parameters on the water withdrawal flow provided by an embodiment of the present application;

[0042] Figure 3 This is a schematic diagram of the effect of different irrigation efficiencies on water return flow provided in an embodiment of the present application;

[0043] Figure 4 It is a structural schematic diagram of a river ecological flow control system based on agricultural irrigation provided in an embodiment of the present application;

[0044] Figure 5 It is a schematic diagram of the hardware structure of the electronic device provided in the embodiment of the present application. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the embodiments of the present application. They are only examples of systems and methods consistent with some aspects of the embodiments of the present application as detailed in the attached claims.

[0046] It is understood that the terms "first", "second", etc. used in this application can be used to describe various concepts in this article, but unless otherwise specified, these concepts are not limited by these terms. These terms are only used to distinguish one concept from another concept. For example, without departing from the scope of the embodiment of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the words "if" and "if" as used herein can be interpreted as "at the time of" or "when" or "in response to determination".

[0047] The terms "at least one", "multiple", "each", "any", etc. used in this application, at least one includes one, two or more, multiple includes two or more, each refers to each of the corresponding multiple, and any refers to any one of the multiple.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0049] Before describing the embodiments of the present application in detail, some nouns and terms involved in the embodiments of the present application are first described. The nouns and terms involved in the embodiments of the present application are subject to the following explanations.

[0050] Agricultural irrigation is an important part of water use for economic and social development. According to statistics, agricultural irrigation accounts for 70% of the total water use worldwide. People improve the efficiency of river water resources by developing agricultural water-saving irrigation technology. However, many studies in recent years have shown that with the improvement of irrigation efficiency, the amount of agricultural irrigation water in some rivers has not increased, but has shown a decreasing trend.

[0051] The irrigation efficiency paradox refers to the fact that the improvement of irrigation efficiency will lead to an increase in farmland water consumption. The reason is that the advancement of water-saving irrigation technology will enable farmers to use the saved water to expand the irrigation area or plant more water-consuming crops in order to obtain greater economic benefits. In the context of improved irrigation efficiency, the phenomenon of increased agricultural water consumption due to farmers' rent-seeking behavior is called the "irrigation efficiency paradox."

[0052] In related technologies, a large amount of agricultural irrigation water affects the natural hydrological cycle of the basin and changes the ecological flow process of the river. In order to protect the ecological flow of the river, a large number of studies have proposed corresponding control measures from the perspective of strengthening agricultural water-saving irrigation. However, the existence of the irrigation efficiency paradox increases the uncertainty of ecological flow protection measures. Therefore, it is necessary to reasonably control the efficiency of farmland irrigation in the river ecological flow protection measures to seek a balanced development of agricultural output and ecological flow protection.

[0053] In view of this, a method and system for controlling river ecological flow based on agricultural irrigation is provided in the embodiment of the present application. The scheme obtains farmland irrigation data of the river to be controlled; simulates the hydrological process of the river to be controlled according to the farmland irrigation data to obtain a hydrological model; on the basis of the hydrological model, further simulates the rent-seeking behavior of farmers in the river to be controlled to obtain a hydrological-social coupling model, which can further consider the impact of farmers' rent-seeking behavior on the hydrological process on the basis of considering the changes in the hydrological process, and can more comprehensively describe the water cycle process. The scheme also analyzes the impact of flow on the river to be controlled according to the coupling model to obtain the first impact relationship; controls the irrigation efficiency according to the first impact relationship, thereby controlling the ecological flow of the river to be controlled, and can clarify the relationship between irrigation efficiency control and ecological flow guarantee targets, thereby improving the efficiency of river ecological flow control. This scheme analyzes the impact mechanism of farmland irrigation efficiency on river flow process by constructing a hydrological-social coupling model that couples farmland irrigation hydrological process and farmers' rent-seeking behavior, and finally proposes an ecological flow control method that considers ecological flow guarantee targets and farmland irrigation water utilization coefficients.

[0054] Figure 1 is an optional flow chart of a river ecological flow control method based on agricultural irrigation provided in an embodiment of the present application. Figure 1 The method may include but is not limited to steps S101 to S105.

[0055] Step S101, obtaining farmland irrigation data of the river to be controlled;

[0056] Step S102, performing hydrological process simulation processing on the river to be controlled according to the farmland irrigation data to obtain a hydrological model;

[0057] Step S103, simulating the rent-seeking behavior of farmers on the river to be controlled to obtain a social model, and coupling the social model with the hydrological model to obtain a coupled model;

[0058] Step S104, performing flow impact analysis on the river to be controlled according to the coupling model to obtain a first impact relationship, where the first impact relationship is a relationship between irrigation efficiency and ecological flow control ratio;

[0059] Step S105: controlling the irrigation efficiency through the first influence relationship according to the ecological flow control target, thereby controlling the ecological flow of the river to be controlled.

[0060] Steps S101 to S105 shown in the embodiment of the present application are to obtain farmland irrigation data of the river to be controlled, so as to simulate the hydrological process of the river to be controlled, and simulate the rent-seeking behavior of farmers in the river to be controlled in combination with the hydrological model to obtain a hydrological-social coupling model, so as to analyze the flow impact of the river to be controlled according to the coupling model to obtain the first impact relationship, which is the relationship between irrigation efficiency and ecological flow control ratio. Finally, the ecological flow control target is determined, and the ecological flow control target can be obtained by setting the ecological flow control ratio, so as to control the farmland irrigation efficiency within a reasonable range through the ecological flow control ratio according to the relationship between irrigation efficiency and ecological flow control ratio, and ensure that the river flow is not lower than the ecological flow control target, thereby forming an ecological flow control method for the river. The embodiment of the present application realizes the two-way coupling and co-evolution process simulation between social behavior and hydrological processes by constructing a hydrological-social coupling model that couples the farmland irrigation hydrological process with the rent-seeking behavior of farmers. On this basis, the impact mechanism of changes in farmland irrigation efficiency on river flow processes is analyzed, and finally an ecological flow control method that considers ecological flow guarantee goals and irrigation efficiency is proposed, which improves the control efficiency of river ecological flow and thus protects the ecological environment of the river.

[0061] In step S101 of some embodiments, farmland irrigation data of the river to be controlled may be obtained by field investigation, and the farmland irrigation data of the river to be controlled includes time period, water intake from the river, crop water consumption, farmland water return, deep seepage water, etc. The farmland irrigation data of the river to be controlled may also be obtained by other methods, such as crawling data from a database, but is not limited thereto.

[0062] In step S102 of some embodiments, the hydrological process simulation processing of the river to be controlled is performed according to the farmland irrigation data to obtain a hydrological model, including the following steps:

[0063] Performing hydrological process simulation on the river to be controlled to obtain the amount of water returned from farmland;

[0064] The water volume change rate of the farmland water withdrawal is calculated and processed according to the irrigation efficiency and the water withdrawal coefficient to obtain a hydrological model.

[0065] In the embodiment of the present application, the hydrological process of farmland irrigation in the basin of the river to be controlled is simulated to construct a lumped hydrological model. In a feasible embodiment, it is assumed that within a certain period of time, the farmland takes water from the river to be controlled, and the amount of water used for agricultural irrigation consists of three parts, namely, crop water consumption, farmland water withdrawal, and deep seepage water. Therefore, the calculation formula for agricultural irrigation water is as follows:

[0066] W u=W T +W r +W nr ;

[0067] Where W u Indicates the amount of agricultural irrigation water, W T Represents crop water consumption, W r represents the amount of water withdrawal from farmland, W nr Indicates the amount of deep water leakage.

[0068] In the hydrological process of farmland irrigation, the unused water and the returned water return to the river. The calculation formula for the unused water is as follows:

[0069] W nu =W i -W u ;

[0070] Where W nu Indicates the amount of unused water, W i represents the water intake from the river, W u Indicates the amount of agricultural irrigation water.

[0071] The amount of water returned from farmland can be calculated based on the calculation formula of agricultural irrigation water volume. Assuming the agricultural irrigation efficiency is E according to the hydrological process, then:

[0072] W T =EW u ;

[0073] Among them, agricultural irrigation efficiency refers to the irrigation water utilization coefficient, which refers to the ratio of the effective water volume injected into the field to the water volume introduced at the head of the canal. In general, it can be calculated based on the net irrigation quota and the headwater intake, that is, irrigation efficiency = net irrigation quota / headwater intake. The value range of irrigation efficiency is 0 to 1, and the larger the value, the higher the irrigation water utilization efficiency. Then, according to the hydrological process, the farmland irrigation water withdrawal coefficient is set as k r ,but:

[0074] W r =(W i -W u )+k r (W u -W T )=W i -[1-k r (1-E)]W u ;

[0075] Among them, the farmland irrigation water withdrawal coefficient refers to the ratio between the irrigation withdrawal amount and the irrigation water volume, that is, the farmland irrigation water withdrawal coefficient = irrigation withdrawal amount / irrigation water volume. Among them, irrigation withdrawal, also called irrigation return water, is the amount of water that returns to rivers and lakes through both surface and underground pathways during farmland irrigation. The value range of the farmland irrigation water withdrawal coefficient is 0 to 1. The larger the value, the greater the proportion of withdrawal to irrigation water. At this time, the water volume change rate of the farmland withdrawal at time t can be calculated, which can be obtained by deriving the formula, the water volume change rate Q of the farmland withdrawal. r The calculation formula of (t) is as follows:

[0076]

[0077] Then, by substituting the irrigation efficiency and the water withdrawal coefficient into the derivative formula, we can obtain:

[0078]

[0079] Finally, the following expression is obtained:

[0080]

[0081] The embodiment of the present application simulates the hydrological process of farmland irrigation in the basin, and thus calculates the water volume change rate of farmland withdrawal according to the irrigation efficiency and the withdrawal coefficient to obtain a lumped hydrological model. This model can take into account the changes in the hydrological process of the river to be controlled under the influence of agricultural irrigation, and provides a data basis for the subsequent ecological flow control of the river to be controlled.

[0082] In step S103 of some embodiments, simulating the rent-seeking behavior of farmers on the river to be controlled to obtain a social model, and coupling the social model with the hydrological model to obtain a coupled model, includes the following steps:

[0083] The rent-seeking behavior of farmers is simulated according to the sensitive parameters of rent-seeking behavior to obtain the social model;

[0084] The social model and the hydrological model are coupled to obtain a coupled model.

[0085] In the embodiment of the present application, the reason for the existence of the agricultural irrigation efficiency paradox is that the advancement of water-saving irrigation technology will enable farmers to use the saved water to expand the irrigation area or plant more water-consuming crops in order to obtain greater economic benefits, thereby leading to an increase in crop water consumption. Therefore, the embodiment of the present application uses a dynamic model to simulate the rent-seeking behavior of farmers, and uses rent-seeking behavior sensitive parameters as model parameters to construct a social model, wherein the rent-seeking behavior sensitive parameters describe the farmer's behavioral attitude towards the further use of unused water (i.e., the amount of water other than the amount of water required to satisfy the original crop irrigation). For example, for a farmer, 100 cubic meters of water were originally required to meet the crop irrigation needs. After improving irrigation means and improving irrigation efficiency, only 80 cubic meters of water were needed to meet the crop irrigation needs, so the farmer saved 20 cubic meters of water. For this part of the extra water, farmers may tend to continue to use it, such as expanding the irrigation area or planting more water-consuming crops. This behavior of farmers is called rent-seeking behavior. The degree of this behavior tendency is described by a coefficient, which is the rent-seeking behavior sensitive parameter. The parameter value needs to be determined based on actual surveys or historical records, such as the amount of water saved due to the improvement of irrigation efficiency in recent years and the actual crop water consumption. Among them, the parameter is a dimensionless parameter with a value range of 0 to ∞. In the social model, the change in crop water consumption rate is positively correlated with the amount of unused water. By simulating the rent-seeking behavior of farmers, the expression of the social model for the rent-seeking behavior sensitive parameter is as follows:

[0086]

[0087] In the formula, γ represents the sensitive parameter of rent-seeking behavior, Q i (t) represents the rate of change of water volume in the river at time t, Q u (t) represents the rate of change of agricultural irrigation water at time t.

[0088] The embodiment of the present application further considers the impact of farmers' rent-seeking behavior on the hydrological process on the basis of considering the changes in the hydrological process, and can more comprehensively describe the natural-artificial binary water cycle process, thereby improving the comprehensiveness of the ecological flow control of the river.

[0089] In step S104 of some embodiments, performing flow impact analysis on the river to be controlled according to the coupling model to obtain a first impact relationship includes the following steps:

[0090] Performing agricultural irrigation simulation processing on the river to be controlled to obtain the river flow after the influence of agricultural irrigation;

[0091] Performing simulation analysis on the river flow after the agricultural irrigation influence according to the coupling model to obtain a second influence relationship, wherein the second influence relationship is a relationship between the irrigation efficiency and the river flow after the agricultural irrigation influence;

[0092] Determine the ecological flow control target according to the ecological flow control ratio;

[0093] The second impact relationship is jointly analyzed and processed according to the ecological flow control target to obtain the first impact relationship.

[0094] In the embodiment of the present application, the impact of agricultural irrigation on river flow is analyzed based on the hydrological-social coupling model. After the agricultural irrigation simulation is performed on the controlled river through the hydrological model, the river flow after the agricultural irrigation can be obtained. The calculation formula of the river flow after the agricultural irrigation is as follows:

[0095] Q2(t)=Q1(t)-Q i (t)+Q r (t);

[0096] In the formula, Q2(t) represents the river flow after the impact of agricultural irrigation, Q1(t) represents the flow in the river before agricultural irrigation, that is, the river flow before the impact of agricultural irrigation, Q i (t) represents the rate of change of water volume in the river at time t, Q r (t) represents the rate of change of water volume of farmland drainage at time t.

[0097] Then, according to the coupling model, the river flow after the influence of agricultural irrigation is simulated and analyzed. By coupling the process of agricultural irrigation in the river with the dynamic process of farmers' rent-seeking behavior, the influence of different rent-seeking behavior sensitive parameters and irrigation efficiency on the backflow flow is analyzed, so as to obtain the second influence relationship, which is the relationship between irrigation efficiency and river flow after agricultural irrigation. Then, the ecological flow control target is determined according to the ecological flow control ratio, and the minimum ecological flow of the river to be controlled is guaranteed according to a certain proportion of the natural flow of the river, so as to set the corresponding ecological flow control target. Finally, according to the ecological flow control target, the second influence relationship is jointly analyzed and processed to obtain the first influence relationship, that is, the relationship between irrigation efficiency and ecological flow control ratio. The embodiment of the present application analyzes the relationship between irrigation efficiency and ecological flow control ratio, so as to obtain a river ecological flow control method by controlling agricultural irrigation efficiency within a reasonable range.

[0098] In some embodiments, the steps of simulating and analyzing the river flow affected by the agricultural irrigation according to the coupling model to obtain the second impact relationship include the following steps:

[0099] Performing dynamic simulation processing on the drainage flow rate according to the coupling model to obtain a third influence relationship, wherein the third influence relationship is the influence relationship between the irrigation efficiency and the drainage flow rate;

[0100] The river flow affected by agricultural irrigation is analyzed and processed according to the third influence relationship to obtain a second influence relationship.

[0101] In the embodiment of the present application, it is necessary to simulate and analyze the river flow after the influence of agricultural irrigation through the coupling model to obtain the second influence relationship, that is, the relationship between the irrigation efficiency and the river flow after the influence of agricultural irrigation. Specifically, the coupling model is used to dynamically simulate the backflow flow, the hydrological process simulation is performed on the controlled river to obtain a hydrological model, and the rent-seeking behavior of farmers in the controlled river is simulated to obtain a social model, so as to couple the social model with the hydrological model to obtain a coupling model, which can analyze the backflow flow according to different sensitive parameters of farmers' rent-seeking behavior and different irrigation efficiencies, referring to Figure 2 , Figure 2 The dynamic changes of the retreat flow under the influence of different rent-seeking behavior sensitive parameters and the process of final convergence to a steady state are shown. Figure 3 , Figure 3 The process of dynamic changes in drainage flow under the influence of different irrigation efficiencies and final convergence to a steady state is demonstrated. It can be seen that although the sensitive parameters of farmers' rent-seeking behavior will affect the convergence rate in the process of agricultural drainage flow changes, the final steady-state flow of the river still depends on the irrigation efficiency; under the influence of the irrigation efficiency paradox mechanism, with the improvement of irrigation efficiency, the agricultural drainage flow gradually decreases, which means that the flow in the river channel, that is, the river flow after the influence of agricultural irrigation, decreases. Therefore, the third influence relationship is finally obtained, that is, the influence relationship of irrigation efficiency on drainage flow. The embodiment of the present application analyzes the impact of agricultural irrigation on river flow based on the hydrological-social coupling model, which can take into account the uncertainty of the irrigation efficiency paradox on water-saving irrigation and improve the accuracy of river ecological flow control.

[0102] In some embodiments, determining the ecological flow control target according to the ecological flow control ratio includes the following steps:

[0103] Obtain river flow before agricultural irrigation impact and set ecological flow control ratio;

[0104] The ecological flow control ratio is multiplied by the river flow before the impact of agricultural irrigation to obtain an ecological flow control target, so that the river flow after the impact of agricultural irrigation is controlled according to the ecological flow control target.

[0105] In the embodiment of the present application, the river flow before the impact of agricultural irrigation is obtained, and the ecological flow control ratio is obtained according to a certain proportion of the natural flow of the river, and the value range of the ecological flow control ratio is 0 to 1. Then, the ecological flow control target is obtained by multiplying the ecological flow control ratio with the river flow before the impact of agricultural irrigation. The expression of the ecological flow control target is as follows:

[0106] Q eco (t) = ωQ1(t);

[0107] In the formula, Q eco (t) represents the ecological flow control target, ω represents the ecological flow control ratio, and Q1(t) represents the river flow before the impact of agricultural irrigation. By setting the ecological flow control ratio, the control ratio of water withdrawal outside the river can be set within (1-ω), so as to control the river flow after the impact of agricultural irrigation according to the ecological flow control target. The expression is as follows:

[0108] Q2(t)≥Q eco (t);

[0109] In the formula, the river flow after agricultural irrigation needs to be greater than or equal to the ecological flow control target. The embodiment of the present application sets an ecological flow control target to control the ecological flow of the river, which can ensure that the river flow is not lower than the ecological flow control target, thereby protecting the ecological environment of the river.

[0110] In some embodiments, the steps of performing a joint analysis on the second impact relationship according to the ecological flow control target to obtain the first impact relationship include the following steps:

[0111] Obtain ecological flow control targets;

[0112] The ecological flow control target is combined with the hydrological model and the second impact relationship to perform a joint derivation process to obtain a first impact relationship.

[0113] In the embodiment of the present application, the second influence relationship is jointly analyzed and processed according to the ecological flow control target to obtain the first influence relationship, that is, the relationship between irrigation efficiency and ecological flow control ratio. Specifically, the ecological flow control target is combined with the hydrological model and the second influence relationship for joint derivation processing, and the expression of the first influence relationship is obtained as follows:

[0114] [(1-ω)Q1(t)-k r Q T (t)]E≥(1-k r )Q T (t);

[0115] It can be seen that (1-ω)Q1(t) and k r Q T (t) determines the relationship between irrigation efficiency and ecological flow control ratio. When (1-ω)Q1(t)≥k r Q T (t), that is When:

[0116]

[0117] On the contrary, when When:

[0118]

[0119] In the embodiment of the present application, the irrigation efficiency can be controlled within a reasonable range according to the ecological flow control ratio. Among them, the ecological flow control ratio can be calculated by setting the corresponding farmland irrigation water withdrawal coefficient, so that the irrigation efficiency can be controlled according to the ecological flow control ratio. Specifically, by setting the ecological flow control target, the ecological flow control ratio is determined according to the ecological flow control target, and finally the irrigation efficiency is controlled according to the ecological flow control ratio, so that the farmland irrigation efficiency is reasonably controlled in the river ecological flow guarantee measures, the uncertainty of the irrigation efficiency paradox is taken into account, and the relationship between the irrigation efficiency control and the ecological flow guarantee target is clarified, so as to ensure that the river flow is not lower than the ecological flow control target, and form an ecological flow control method for the controlled river, which improves the efficiency of the ecological flow control of the river, and can further protect the ecological environment of the river.

[0120] In step S105 of some embodiments, the irrigation efficiency is controlled and processed through the first influence relationship according to the ecological flow control target, so as to control the ecological flow of the river to be controlled. Specifically, by setting the ecological flow control target, the ecological flow control ratio is determined according to the ecological flow control target, and finally the irrigation efficiency is controlled according to the ecological flow control ratio, so as to reasonably control the farmland irrigation efficiency in the river ecological flow guarantee measures. Due to the influence of the irrigation efficiency paradox mechanism, as the irrigation efficiency increases, the agricultural drainage flow gradually decreases, resulting in a gradual decrease in the flow affected by agricultural irrigation. Therefore, the embodiment of the present application controls the farmland irrigation water utilization coefficient within a reasonable range through the ecological flow control target to the ecological flow control ratio, thereby ensuring that the river flow is not lower than the ecological flow control target.

[0121] The following is a detailed description of the embodiments of the present invention with reference to specific application examples:

[0122] The embodiments of the present application can be applied to the scenario of river environmental protection, especially rivers with agricultural irrigation. The hydrological model is used to simulate the hydrological process of farmland irrigation in the river, so as to obtain the farmland drainage flow. Then, by considering the paradox of agricultural irrigation efficiency, a dynamic model is used to simulate the rent-seeking behavior of farmers, and a social model is constructed. And based on the hydrological-social coupling model, the impact of agricultural irrigation on river flow is analyzed, and the relationship between irrigation efficiency and ecological flow control ratio is analyzed. The corresponding ecological flow control ratio can be obtained by setting the corresponding ecological flow control target, wherein the ecological flow control target is the ecological flow of the river after agricultural irrigation, which can be set according to actual conditions. The relationship between the irrigation efficiency and the ecological flow control ratio can be calculated according to the expression of the first influencing relationship, so that the irrigation efficiency is controlled within a reasonable range according to the ecological flow control ratio, ensuring that the river flow is not lower than the ecological flow control target, and controlling the ecological flow of the controlled river.

[0123] See also Figure 4 The embodiment of the present application also provides a river ecological flow control system based on agricultural irrigation, which can implement the above-mentioned river ecological flow control method based on agricultural irrigation. The system includes:

[0124] The first module 401 is used to obtain farmland irrigation data of the river to be controlled;

[0125] The second module 402 is used to simulate the hydrological process of the river to be controlled according to the farmland irrigation data to obtain a hydrological model;

[0126] The third module 403 is used to simulate the rent-seeking behavior of farmers on the river to be controlled to obtain a social model, and couple the social model with the hydrological model to obtain a coupled model;

[0127] The fourth module 404 is used to perform flow impact analysis on the river to be controlled according to the coupling model to obtain a first impact relationship, where the first impact relationship is a relationship between irrigation efficiency and ecological flow control ratio;

[0128] The fifth module 405 is used to control the irrigation efficiency through the first influence relationship according to the ecological flow control target, so as to control the ecological flow of the river to be controlled.

[0129] It can be understood that the contents of the above method embodiments are all applicable to the present system embodiments, the functions specifically implemented by the present system embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0130] The embodiment of the present application also provides an electronic device, the electronic device includes a memory and a processor, the memory stores a computer program, and the processor implements the above-mentioned river ecological flow control method based on agricultural irrigation when executing the computer program. The electronic device can be any smart terminal including a tablet computer, a car computer, etc.

[0131] It can be understood that the contents of the above method embodiments are all applicable to the present device embodiments, the functions specifically implemented by the present device embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0132] See also Figure 5 , Figure 5 The hardware structure of an electronic device of another embodiment is illustrated, and the electronic device includes:

[0133] The processor 501 may be implemented by a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of the present application;

[0134] The memory 502 can be implemented in the form of a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 502 can store an operating system and other application programs. When the technical solution provided in the embodiment of this specification is implemented by software or firmware, the relevant program code is stored in the memory 502, and the processor 501 calls and executes a river ecological flow control method based on agricultural irrigation in the embodiment of this application;

[0135] Input / output interface 503, used to implement information input and output;

[0136] Communication interface 504, used to realize communication interaction between the device and other devices, which can be realized by wired mode (such as USB, network cable, etc.) or wireless mode (such as mobile network, WIFI, Bluetooth, etc.);

[0137] A bus 505 that transmits information between the various components of the device (e.g., the processor 501, the memory 502, the input / output interface 503, and the communication interface 504);

[0138] The processor 501 , the memory 502 , the input / output interface 503 and the communication interface 504 are connected to each other in communication within the device via the bus 505 .

[0139] An embodiment of the present application also provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, it implements the above-mentioned river ecological flow control method based on agricultural irrigation.

[0140] It can be understood that the contents of the above method embodiments are all applicable to the present storage medium embodiments, the functions specifically implemented by the present storage medium embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0141] The memory, as a non-transient computer-readable storage medium, can be used to store non-transient software programs and non-transient computer executable programs. In addition, the memory may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some embodiments, the memory may optionally include a memory remotely disposed relative to the processor, and these remote memories may be connected to the processor via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0142] The embodiment of the present application provides a river ecological flow control method and system based on agricultural irrigation. The scheme obtains farmland irrigation data of the river to be controlled; simulates the hydrological process of the river to be controlled based on the farmland irrigation data to obtain a hydrological model; simulates the rent-seeking behavior of farmers in the river to be controlled to obtain a social model, and couples the social model with the hydrological model to obtain a coupling model. On the basis of considering the changes in the hydrological process, it can further consider the impact of farmers' rent-seeking behavior on the hydrological process, and can more comprehensively describe the water cycle process. The scheme also performs flow impact analysis on the river to be controlled based on the coupling model to obtain a first impact relationship; controls the irrigation efficiency based on the first impact relationship, thereby controlling the ecological flow of the river to be controlled, and can clarify the relationship between irrigation efficiency control and ecological flow guarantee goals, thereby improving the efficiency of river ecological flow control.

[0143] The embodiments described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Those skilled in the art will appreciate that with the evolution of technology and the emergence of new application scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0144] Those skilled in the art will appreciate that the technical solutions shown in the figures do not constitute a limitation on the embodiments of the present application, and may include more or fewer steps than shown in the figures, or a combination of certain steps, or different steps.

[0145] The system embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separated, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment.

[0146] Those skilled in the art will appreciate that all or some of the steps in the methods disclosed above, and the functional modules / units in the systems and devices may be implemented as software, firmware, hardware, or a suitable combination thereof.

[0147] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0148] It should be understood that in the present application, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0149] In the several embodiments provided in the present application, it should be understood that the disclosed systems and methods can be implemented in other ways. For example, the system embodiments described above are only schematic. For example, the division of the above units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of systems or units, which can be electrical, mechanical or other forms.

[0150] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0151] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0152] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including multiple instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, referred to as ROM), random access memory (Random Access Memory, referred to as RAM), disk or optical disk and other media that can store programs.

[0153] The preferred embodiments of the present invention are described above with reference to the accompanying drawings, but the scope of the rights of the present invention is not limited thereto. Any modification, equivalent substitution and improvement made by a person skilled in the art without departing from the scope and essence of the present invention should be within the scope of the rights of the present invention.

Claims

1. A river ecological flow control method based on agricultural irrigation, characterized in that: The method comprises the following steps: Obtain farmland irrigation data for rivers to be controlled; Performing hydrological process simulation processing on the river to be controlled according to the farmland irrigation data to obtain a hydrological model; The rent-seeking behavior of farmers is simulated on the river to be controlled to obtain a social model, and the social model is coupled with the hydrological model to obtain a coupled model; the rent-seeking behavior of farmers is used to represent the behavior of farmers to further use the unused water; Performing flow impact analysis on the river to be controlled according to the coupling model to obtain a first impact relationship, where the first impact relationship is a relationship between irrigation efficiency and ecological flow control ratio; According to the ecological flow control target, the irrigation efficiency is controlled through the first influence relationship, so as to control the ecological flow of the river to be controlled; The step of performing flow impact analysis on the river to be controlled according to the coupling model to obtain a first impact relationship comprises the following steps: Performing agricultural irrigation simulation processing on the river to be controlled to obtain the river flow after the influence of agricultural irrigation; Performing simulation analysis on the river flow after the agricultural irrigation influence according to the coupling model to obtain a second influence relationship, wherein the second influence relationship is a relationship between the irrigation efficiency and the river flow after the agricultural irrigation influence; Determine the ecological flow control target according to the ecological flow control ratio; The second impact relationship is jointly analyzed and processed according to the ecological flow control target to obtain the first impact relationship.

2. The method according to claim 1, characterized in that The step of simulating the hydrological process of the river to be controlled according to the farmland irrigation data to obtain a hydrological model includes the following steps: Performing hydrological process simulation on the river to be controlled to obtain the amount of water returned from farmland; The water volume change rate of the farmland water withdrawal is calculated and processed according to the irrigation efficiency and the water withdrawal coefficient to obtain a hydrological model.

3. The method according to claim 1, characterized in that The step of simulating the rent-seeking behavior of farmers on the river to be controlled to obtain a social model, and coupling the social model with the hydrological model to obtain a coupled model includes the following steps: The rent-seeking behavior of farmers is simulated according to the sensitive parameters of rent-seeking behavior to obtain the social model; The social model and the hydrological model are coupled to obtain a coupled model.

4. The method according to claim 1, characterized in that: The method of simulating and analyzing the river flow affected by the agricultural irrigation according to the coupling model to obtain a second impact relationship includes the following steps: Performing dynamic simulation processing on the drainage flow rate according to the coupling model to obtain a third influence relationship, wherein the third influence relationship is the influence relationship between the irrigation efficiency and the drainage flow rate; The river flow affected by agricultural irrigation is analyzed and processed according to the third influence relationship to obtain a second influence relationship.

5. The method according to claim 1, characterized in that: Determining the ecological flow control target according to the ecological flow control ratio includes the following steps: Obtain river flow before agricultural irrigation impact and set ecological flow control ratio; The ecological flow control ratio is multiplied by the river flow before the impact of agricultural irrigation to obtain an ecological flow control target, so that the river flow after the impact of agricultural irrigation is controlled according to the ecological flow control target.

6. The method according to claim 1, characterized in that The step of performing joint analysis on the second impact relationship according to the ecological flow control target to obtain the first impact relationship includes the following steps: Obtain ecological flow control targets; The ecological flow control target is combined with the hydrological model and the second impact relationship to perform a joint derivation process to obtain a first impact relationship.

7. A river ecological flow control system based on agricultural irrigation, characterized in that: The system includes the following modules: The first module is used to obtain farmland irrigation data of the rivers to be controlled; The second module is used to simulate the hydrological process of the river to be controlled according to the farmland irrigation data to obtain a hydrological model; The third module is used to simulate the rent-seeking behavior of farmers in the river to be controlled to obtain a social model, and couple the social model with the hydrological model to obtain a coupled model; the rent-seeking behavior of farmers is used to represent the behavior of farmers to further use the unused water; The fourth module is used to perform flow impact analysis on the river to be controlled according to the coupling model to obtain a first impact relationship, where the first impact relationship is a relationship between irrigation efficiency and ecological flow control ratio; A fifth module is used to control the irrigation efficiency through the first influence relationship according to the ecological flow control target, so as to control the ecological flow of the river to be controlled; The fourth module is used to perform flow impact analysis on the river to be controlled according to the coupling model to obtain a first impact relationship, including: Performing agricultural irrigation simulation processing on the river to be controlled to obtain the river flow after the influence of agricultural irrigation; Performing simulation analysis on the river flow after the agricultural irrigation influence according to the coupling model to obtain a second influence relationship, wherein the second influence relationship is a relationship between the irrigation efficiency and the river flow after the agricultural irrigation influence; Determine the ecological flow control target according to the ecological flow control ratio; The second impact relationship is jointly analyzed and processed according to the ecological flow control target to obtain the first impact relationship.

8. An electronic device, characterized in that: The electronic device comprises a memory and a processor, the memory stores a computer program, and the processor implements the method according to any one of claims 1 to 6 when executing the computer program.

9. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 6 is implemented.

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