Crop irrigation quota determination method and device for water resource allocation, medium and product
By calculating soil moisture changes and applying the principle of water balance, irrigation quotas for crops before sowing and during their growth stages are calculated. This solves the problems of low accuracy and poor applicability in existing irrigation quota calculations, and enables more accurate prediction of agricultural water demand.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- ZHONGSHUIHUAIHEGUIHUA DESIGN RES CO LTD
- Filing Date
- 2026-05-25
- Publication Date
- 2026-06-19
Smart Images
Figure CN122242982A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the fields of resource planning and water-saving irrigation, and in particular to a method, equipment, medium and product for determining crop irrigation quotas for water resource allocation. Background Technology
[0002] In the issue of water resource allocation in watersheds, it is necessary to predict and allocate water demand for domestic, agricultural, ecological, and industrial use in each water resource zone for the planning year. The water demand can be calculated based on the water consumption quotas of each industry. The water demand for domestic, ecological, and industrial use can be estimated based on the unit water consumption quotas corresponding to population, greening and environmental protection, and industrial added value. Since agriculture is closely related to meteorological data, it is difficult to estimate agricultural water consumption quotas. In areas where agricultural water use is the main focus, such as farmland, it is necessary to develop a method for calculating farmland irrigation quotas suitable for the watershed.
[0003] Currently, there are two main methods for calculating farmland irrigation quotas: (1) Experience method: mainly based on past experience, for example, directly determine the current annual farmland irrigation quota based on experience.
[0004] The accuracy of farmland irrigation quotas determined by empirical methods is relatively coarse, which has a significant impact on the error of subsequent agricultural water demand forecasts.
[0005] (2) Irrigation system method: The irrigation system is determined by the water balance method, and the irrigation quotas for dryland crops are calculated using the prescribed formulas for the pre-sowing and growth periods and for rice seedling beds, paddy fields, and growth periods. The number of irrigations, irrigation time, and irrigation volume during the growth period need to be calculated through water balance calculations.
[0006] However, the irrigation system method has poor applicability and is difficult to use directly for calculating irrigation quotas for crops in actual projects; it can only serve as a principle for new calculation methods. Therefore, it is crucial to solve the problems of low accuracy and poor applicability of current farmland irrigation quota calculation methods. Summary of the Invention
[0007] The purpose of this application is to provide a method, equipment, medium, and product for determining crop irrigation quotas for water resource allocation, which can improve applicability and calculation accuracy.
[0008] To achieve the above objectives, this application provides the following solution: Firstly, this application provides a method for determining crop irrigation quotas based on water resource allocation, wherein the method is applied to a crop planting scenario; the crops include dryland crops and rice; the planting stages of dryland crops include a pre-sowing stage and a growth stage, wherein the growth stage includes multiple growth stages; the planting stages of rice include a pre-sowing stage and a post-sowing stage, wherein the post-sowing stage includes multiple sub-stages; The method for determining crop irrigation quotas based on water resource allocation includes: Determine the target planting parameters; the target planting parameters include: the target soil moisture value before sowing and the number of days for retrospective analysis; Based on the planting target parameters, soil moisture change calculations are performed to determine the soil moisture content change before sowing and the amount of irrigation water required to meet the preset soil moisture content before sowing, so as to obtain daily irrigation quota information for the pre-sowing stage. The soil moisture content at the end of the pre-sowing stage is determined based on the changes in soil moisture content before sowing; Irrigation quotas for dryland crop growth stages and rice post-sowing stages are determined based on soil moisture content at the end of the pre-sowing stage.
[0009] Secondly, this application provides a computer device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the above-described method for determining crop irrigation quotas for water resource allocation.
[0010] Thirdly, this application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-described method for determining crop irrigation quotas for water resource allocation.
[0011] Fourthly, this application provides a computer program product, including a computer program that, when executed by a processor, implements the above-described method for determining crop irrigation quotas for water resource allocation.
[0012] According to the specific embodiments provided in this application, the following technical effects are disclosed: This application provides a method, equipment, medium, and product for determining crop irrigation quotas based on water resource allocation. It calculates soil moisture changes based on planting target parameters to determine the changes in soil moisture content before sowing and the amount of irrigation water required to meet the preset soil moisture content before sowing, obtaining daily irrigation quota information for the pre-sowing stage. Based on the changes in soil moisture content before sowing, it determines the soil moisture content at the end of the pre-sowing stage. Based on the soil moisture content at the end of the pre-sowing stage, it determines the irrigation quota information corresponding to the growth stages of dryland crops and the post-sowing stage of rice. This application is based on the principle of water balance and the irrigation methods of actual watershed agriculture, formulating corresponding irrigation systems for different crops and obtaining the irrigation quota required for the entire growth cycle of the crop based on soil moisture content. Therefore, this application improves applicability and calculation accuracy. Attached Figure Description
[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0014] Figure 1 A flowchart illustrating the method for determining crop irrigation quotas based on water resource allocation; Figure 2 A schematic diagram illustrating the overall calculation process for determining crop irrigation quotas based on water resource allocation; Figure 3 A schematic diagram showing the calculation results of the daily irrigation quota for summer maize in the area south of a dam; Figure 4 A schematic diagram showing the calculation results of the daily irrigation quota for rice in the area south of a dam; Figure 5 A schematic diagram showing the calculation results of the daily irrigation quota for winter wheat in the area north of a certain dam; Figure 6 A schematic diagram showing the calculation results of the daily irrigation quota for rice in the area north of a certain dam; Figure 7 This is a schematic diagram of the structure of a computer device provided in an embodiment of this application. Detailed Implementation
[0015] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.
[0016] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0017] Irrigation quota refers to the amount of water used for a single irrigation per unit area or the total amount of water used for all irrigations during the entire growth period of a crop.
[0018] An irrigation system refers to a systematic arrangement of the number of irrigations, the time of each irrigation, the irrigation quota, and the total irrigation quota throughout the entire growth period of a crop, in order to meet the water requirements for normal crop growth.
[0019] Water balance refers to the situation where, within a specific region and time period, the difference between the input and output of water equals the change in water storage within that region.
[0020] In an exemplary embodiment, a method for determining crop irrigation quotas based on water resource allocation is provided. This method is applied to a crop planting scenario. The crops include dryland crops and rice. The planting stages of the dryland crops include a pre-sowing stage and a growth stage, with the growth stage including multiple growth stages. The planting stages of the rice include a pre-sowing stage and a post-sowing stage, with the post-sowing stage including multiple sub-stages.
[0021] like Figure 1 As shown, the method for determining crop irrigation quotas based on water resource allocation includes: Step 100: Determine the target planting parameters. The target planting parameters include: the target soil moisture value before sowing and the number of days for backtracking.
[0022] Step 200: Calculate the soil moisture change based on the planting target parameters to determine the soil moisture content change before sowing and the amount of irrigation required to meet the preset soil moisture content before sowing, and obtain the daily irrigation quota information for the pre-sowing stage.
[0023] Among these methods, soil moisture change calculations are performed based on planting target parameters to determine the changes in soil moisture content before sowing and the amount of irrigation water required to meet the preset soil moisture content before sowing, resulting in daily irrigation quota information for the pre-sowing stage, specifically including: Based on the number of backtracking days in the planting target parameters, the formula is used. Soil moisture change calculations were performed to determine the changes in soil moisture content before sowing; among which... For the first Initial soil moisture content starting from day 1; For the first The initial soil moisture content of the day; For the first The effective rainfall per day is measured in mm. For the first The daily evaporation rate, measured in mm; The planned soil wetting depth is expressed in meters (m). for The average soil bulk density at the corresponding depth, in units of ;when hour, The corresponding initial soil moisture content is 0.
[0024] Although when hour, The initial soil moisture content is 0, but as the calculation progresses, the moisture content will be automatically corrected with natural evolution, thus getting closer to the true value.
[0025] The soil moisture content at the last time period within the retrospective period was determined based on changes in soil moisture content before sowing. Based on the pre-sowing soil moisture target value, the irrigation amount required to meet the preset soil moisture content before sowing is determined, resulting in daily irrigation quota information for the pre-sowing stage; the pre-sowing soil moisture target value includes: minimum soil moisture content. Maximum soil moisture content With saturated soil moisture content .
[0026] Among them, when At that time, water needs to be poured in all at once, if If the value is less than 0, assign it to 0; irrigate until the soil moisture content reaches the maximum soil moisture content. At this time, the irrigation quota information includes the irrigation water quota. for: .
[0027] when At this time, there is no need to fill or drain water.
[0028] when When the soil moisture content reaches saturation, it will be drained as free water. After drainage, the soil moisture content will be... Discharge for: .
[0029] Step 300: Determine the soil moisture content at the end of the pre-sowing stage based on the changes in soil moisture content before sowing.
[0030] Step 400: Determine the irrigation quota information corresponding to the growth stages of dryland crops and the post-sowing stages of rice based on the soil moisture content at the end of the pre-sowing stage.
[0031] Specifically, irrigation quotas for the dryland crop growth stages and the rice post-sowing stages are determined based on the soil moisture content at the end of the pre-sowing stage, including: For drought-resistant crops: The soil moisture content at the end of the pre-sowing stage is taken as the initial soil moisture content of the first growth stage in the growth stage; and for the growth stage, the soil moisture content at the end of each growth stage is taken as the initial soil moisture content of the next stage.
[0032] For each growth stage, water balance calculations are performed based on the initial soil moisture content during the start and end time periods of the stage to determine the daily irrigation quota information for the drought-resistant crop during its growth stage.
[0033] In one embodiment, for each growth stage, a water balance calculation is performed based on the initial soil moisture content during the start and end time periods of the stage to determine the daily irrigation quota information for the dryland crop during its growth stage, specifically including: For each growth stage, the following steps are taken daily during the start and end periods of each stage: .
[0034] For the first Soil moisture content at the end of the corresponding time period; when At that time, the first Soil moisture content at the end of the corresponding time period The value is the average soil moisture content before the start of the current growth stage. ; It is determined based on the initial soil moisture content; This represents the average daily water requirement of crops per unit area. For the first Effective rainfall per day; For the first Daily evaporation water volume; Plan the soil wetting depth; for Average soil bulk density within the corresponding depth; For the first Groundwater recharge per unit area per day.
[0035] when When the soil moisture content at the end of that period is set to 0, then the soil moisture content at the end of that period is set to 0. At this time, neither watering nor drainage is required; among them, This represents the highest soil moisture content. This represents the saturated soil moisture content. This represents the minimum soil moisture content.
[0036] when At this time, drainage is required, and the corresponding drainage volume is... for: .
[0037] Plan the soil wetting depth; for Average soil bulk density within the corresponding depth.
[0038] when If the water level is 0, then no watering is needed and the watering amount is 0.
[0039] when At this time, irrigation is required, and the corresponding total irrigation quota is... for: .
[0040] like The average irrigation water volume per cycle for: .
[0041] like The average irrigation water volume per cycle for: .
[0042] First irrigate according to the average irrigation amount, and then replace it at the same time. and : .
[0043] .
[0044] like Then according to renew At the same time, according to renew When the soil moisture content increases by more than [amount] at the end of the corresponding time period If average irrigation is still in progress at this time, then irrigation should be stopped and the system updated. .
[0045] in, This represents the average number of irrigations. The minimum amount of water required for average irrigation; For the updated number Soil moisture content at the end of the corresponding time period; This is the updated total irrigation quota. For example, it is a function for rounding down; floor (1.2)=1, floor (1.9)=1, floor (2.5) = 2.
[0046] Based on the daily irrigation quota information during the pre-sowing stage and the daily irrigation quota information during the growth stage, the daily irrigation quota information for the entire life cycle of dryland crops is determined.
[0047] For rice: The soil moisture content at the end of the pre-sowing stage is used as the initial soil moisture content of the first sub-stage in the post-sowing stage; wherein, for the post-sowing stage, the soil moisture content at the end of each sub-stage is used as the initial soil moisture content of the corresponding next stage.
[0048] For the post-sowing stage: When the sub-stage is the seedbed irrigation stage or the paddy field irrigation stage, the irrigation quota information and drainage volume are determined based on the corresponding initial soil moisture content, and the field water depth at the end of the corresponding paddy field irrigation stage is obtained; when the sub-stage is the growth stage, the daily irrigation volume is calculated based on the field water depth during the beginning and end of the growth stage to determine the daily irrigation quota information and the final field water depth; when the sub-stage is the harvesting stage, the farmland is dried based on the final field water depth to ensure that the soil moisture content after drying is the saturated soil moisture content, and water balance calculation is performed to obtain the irrigation quota information for the harvesting stage.
[0049] For the post-sowing stage: when the sub-stage is the seedbed irrigation stage or the paddy field irrigation stage, the irrigation quota information and drainage volume are determined based on the corresponding initial soil moisture content, and the field water depth at the end of the corresponding paddy field irrigation stage is obtained, specifically including: When the sub-stage is the rice paddy irrigation stage, the corresponding irrigation quota information is as follows. The calculation formula is: .
[0050] in, The proportion of seedling paddy field area to total paddy field area; The depth of the plow in the paddy field; for Average soil bulk density within the depth; for Soil saturation moisture content within depth; This represents the average daily water requirement for rice seedlings. This represents the average daily seepage rate in the rice paddies. This refers to the total duration of the rice seedling stage; This refers to the total rainfall during the rice seedling stage; This represents the initial soil moisture content corresponding to the irrigation stage of the rice seedling bed.
[0051] like When the soil moisture content is less than 0, the soil is saturated and drainage is required. The drainage volume... for: .
[0052] After the irrigation stage of the rice paddy is completed, the soil moisture content is the saturated soil moisture content, which is used as the soil moisture content for the next stage and is denoted as . .
[0053] When the sub-stage is the paddy field irrigation stage, the corresponding irrigation quota information is as follows. The calculation formula is: .
[0054] in, The depth of plowing in paddy fields; for Average soil bulk density within the depth; for Soil saturation moisture content within depth; This refers to the water depth required for rice transplanting. This represents the average daily water requirement for paddy fields. This represents the average daily seepage rate of the paddy field. This represents the total duration of the soaking stage; This represents the total rainfall during the flooding phase.
[0055] like When the soil moisture content is less than 0, the soil is saturated and drainage is required. The drainage volume... for: .
[0056] Irrigation quota information based on the paddy field irrigation stage and drainage volume Determine the field water depth at the end of this stage; at this point, the field water depth is the water depth required for rice transplanting. .
[0057] When the sub-stage is the growth stage, the daily irrigation amount is calculated based on the field water depth during the beginning and end of the growth stage to determine the daily irrigation quota and the final field water depth, specifically including: For the growth stage, the final field water depth is determined based on the daily field water depth, and the daily irrigation quota is obtained based on the daily irrigation amount; the daily calculation process for the growth stage is as follows: Calculate the field water depth at the end of each day : .
[0058] in, For the first The water depth in the field at the end of the day; when hour, Values ; This refers to the water depth required for rice transplanting. For the first Effective rainfall per unit area per day; For the first Evaporation rate per unit area per day; For the first Daily field seepage rate per unit area; This represents the average daily water requirement of crops per unit area.
[0059] when At that time, the water depth in the field was set to 0; when At that time, both the irrigation and drainage volumes were 0. This represents the maximum depth of the water layer in the field. This refers to the maximum depth of water layer in the field that is permissible during rainfall.
[0060] when When the water depth exceeds the maximum permissible depth for field irrigation due to rainfall, average irrigation must be stopped and drainage required. The corresponding drainage volume is... for: .
[0061] when At that time, if the average total amount of irrigation At this time, if average irrigation is not carried out, Then water needs to be poured in; Minimum water depth in the field; average irrigation volume per session : .
[0062] otherwise After determining the average irrigation amount, irrigation is required once. At this time, there is no need to fill or drain water.
[0063] like This indicates that average irrigation is in progress and the water layer depth is being updated. This will serve as the initial depth of the field water layer for the next day.
[0064] in, This is the updated field water depth.
[0065] Irrigation quota information during the harvesting stage The corresponding mathematical expression is: .
[0066] in, This represents the total water requirement during the harvesting stage; This represents the total leakage during the harvesting stage; This represents the total evaporation during the harvesting stage; This represents the total effective rainfall during the harvesting stage.
[0067] The method proposed in this application is based on the principle of water balance and the irrigation methods of actual watershed agriculture. For a certain watershed, the main crops include corn, wheat, peanuts, and rice. These can be divided into two categories: corn, wheat, and peanuts are dryland crops, and rice is a separate category. For dryland crops, it is necessary to ensure that the soil moisture reaches the target value before sowing. Therefore, a certain number of backtracking days is set to calculate the changes in soil moisture. After entering the sowing period, the irrigation system is calculated according to the growth stages of the crop (sowing-tillering, tillering-overwintering, overwintering-greening, greening-jointing, jointing-heading, heading-wintering-harvest, winter ripening-harvest). After harvest, the daily irrigation quota for the crop can be obtained. For rice, irrigation can be divided into four categories: pre-sowing, seedbed, flooding, growth period (transplanting-greening, greening-tillering, tillering-jointing, jointing-booting, booting-heading, heading-yellowing), and harvesting. Each category has a corresponding irrigation system. The growth period includes multiple sub-stages, and the calculation method for each sub-stage is the same, thus obtaining the daily irrigation quota for the crop. Based on the daily irrigation quota, the irrigation quota required for the entire growth cycle of the crop can be obtained. In addition, this method takes into account the possible differences in planting methods in different water resource areas. For example, some areas may not have a seedbed stage or may be missing a certain sub-stage in the remaining stages. Therefore, the method supports normal calculation even after deleting unnecessary growth stages of the crop. The overall calculation process is as follows: Figure 2 As shown.
[0068] Methods for calculating irrigation quotas for dryland crops: Calculations for dryland crops include the pre-sowing stage and the subsequent growth period (i.e., the growth stage). The calculation methods for the multiple sub-stages of the growth period are the same, and they can be connected according to the actual crop growth sequence. The units for water volume, depth, and weight involved in the calculation are cubic meters, meters, and tons per unit area, respectively.
[0069] (1) Pre-broadcast stage: To determine the required irrigation amount before sowing and reduce the uncertainty and error introduced by direct calculations, a period of calculations is needed up to the sowing date. The number of days for the pre-sowing stage, i.e., the number of calculation days, should be determined. Calculate the change in soil moisture content before sowing and the amount of irrigation water required to ensure the minimum soil moisture content, and set the initial soil moisture content as follows: If the initial soil moisture content is 0, the calculation begins from day one and continues until all calculated days are completed. Therefore, the initial soil moisture content during this process is: (1) After calculating the moisture content for the final period, a judgment is made: 1) This means that when the soil moisture content is lower than the minimum soil moisture content, a one-time irrigation is required, continuing until the soil moisture content reaches the maximum soil moisture content. (Irrigation quota) for: (2) After irrigation, the soil moisture content is ,like If the value is less than 0, then the value is assigned to 0.
[0070] 2) At this time, the soil moisture content is within the range required by the crop, and there is no need for irrigation or drainage.
[0071] 3) At this point, the soil moisture content reaches saturation, and the excess water will be discharged as free water. The drainage volume is: (3) After drainage, the soil moisture content is .
[0072] (2) Other reproductive stages: Soil moisture content calculated at the end of the previous stage This represents the initial soil moisture content for the current first stage (sowing-tillering). The other growth stages are, in order, sowing-tillering, tillering-overwintering, overwintering-greening, greening-jointing, jointing-heading, heading-winter ripening, and winter ripening-harvest (7 stages in total). The calculation logic for each stage is the same, and the time sequence is sequential. For each stage, the input parameters required for the calculation are: 1) Start and end times of each stage, measured in days; 2) Average soil moisture content before the start of the current stage. 3) Average daily water requirement of crops per unit area ;4) Daily effective rainfall per unit area 5) Daily evaporation per unit area 6) Daily groundwater recharge per unit area ;7) Average soil bulk density within depth ;8) Planned soil wetting depth ;9) Minimum soil moisture content ;10) Maximum soil moisture content ;11) Saturated soil moisture content ;12) Average number of irrigations ;13) Minimum average irrigation amount .
[0073] Water balance calculations are performed daily during the start and end of the time period. The calculation logic for each day is as follows: 1) First, calculate the soil moisture content at the end of the current time period to determine whether irrigation is necessary. The soil moisture content at the end of the time period is: (4) If it is the first day, then in the above formula for .
[0074] 2) Determine the soil moisture content at the end of the time period. If Then the soil moisture content at the end of the time period is set to 0, that is... ;like At this point, due to rainfall, the soil moisture content is higher than the upper limit, so neither irrigation nor drainage is needed. , At the end of the period, the soil moisture content was ;like This indicates that rainfall has caused the soil moisture content to exceed the upper limit of saturation moisture content, requiring drainage. The drainage volume is: (5) The irrigation amount was 0, and the soil moisture content at the end of the period was 0%. .like If so, proceed to the next step of judgment.
[0075] 3) Before starting the algorithm, the total irrigation quota for the required irrigation period needs to be defined. The initial value is 0. Start by checking if... If the value is zero, it indicates that irrigation is not currently in progress. This parameter is used to determine whether irrigation is currently in effect. Since irrigation requires multiple applications, this parameter effectively avoids repeated irrigation due to the misjudgment of water shortage during the irrigation process. Under the condition, further judgment if Irrigation is needed at this time. First, calculate the total irrigation volume and update. value: (6) The new Value judgment, if: (7) The average irrigation water volume per irrigation for: (8) In this formula, if the denominator is 0, it means the amount of water needed for irrigation is less than the minimum designed irrigation amount, and only one irrigation is required. In this case, the denominator is set to 1. If: (9) This indicates that the irrigation amount per instance is greater than the designed minimum irrigation amount, and the average irrigation amount per instance can be obtained directly. for: (10) Next, irrigate once using the average irrigation amount and record the results. Simultaneously update the soil moisture content: (11) And update the total irrigation quota. : (12) The above is The following calculation process, if If no water is needed, the water volume is 0. This represents the soil moisture content at the end of the current time period.
[0076] 4) If This indicates that average irrigation is currently underway, according to... Update the total irrigation quota, and simultaneously update the soil moisture content according to formula (11). It should be noted that when the soil moisture content increases by more than [amount missing] at the end of a certain period due to climatic reasons, [further details missing]. If average irrigation is still in progress at this time, then irrigation should be stopped and the system updated. .
[0077] Following the steps above, daily calculations are performed for each growth stage of the dryland crop. The final soil moisture content at the end of each stage is used as the initial soil moisture content for the next stage. By calculating in sequence, the daily irrigation quota for the entire life cycle of the dryland crop can be obtained.
[0078] Calculation method for irrigation quotas for rice crops: The calculation method for rice irrigation quotas can be divided into four categories: pre-sowing irrigation, seedbed irrigation, paddy field flooding irrigation, growth stages (transplanting-greening, greening-tillering, tillering-jointing, jointing-booting, booting-heading, heading-yellowing), and harvesting stages (yellowing-harvest). Rainfall and water volume units for this stage are uniformly expressed in mm. If m is required... 3 You can convert it directly.
[0079] (1) Pre-sowing irrigation (pre-sowing stage): The calculation logic for pre-sowing irrigation quotas for rice is the same as that for the pre-sowing stage of dryland crops. After the pre-sowing stage calculations are completed, the irrigation quota for that stage and the soil moisture content at the end of the stage can be obtained, expressed as follows: .
[0080] (2) Irrigation of seedbeds (irrigation stage of seedbeds): Irrigation quota information during the rice paddy irrigation stage Can be calculated in one go: (13) The proportion of seedling paddy fields to the total area of paddy fields. The depth of the plow in the paddy field. for Average soil bulk density within depth. for Soil saturated water content within depth, This represents the average daily water requirement for rice seedlings. This represents the average daily seepage rate in the rice paddies. This refers to the total duration of the rice seedling stage. This represents the total rainfall during the rice paddy stage. In this calculation method, if the calculated... A value less than 0 indicates heavy rainfall and the need for drainage. At this point, the soil moisture content has reached saturation, and the drainage volume is [missing information]. for: (14) Therefore, after the irrigation stage of the seedbed, the soil moisture content is the saturated moisture content, which is used as the soil moisture content for the next stage and is denoted as . .
[0081] (3) Flood irrigation (flood irrigation stage): Irrigation quota information corresponding to the paddy field irrigation stage It is also a calculation: (15) The depth of plowing in paddy fields. for Average soil bulk density within depth. for Soil saturated water content within depth, This refers to the water depth required for rice transplanting. This represents the average daily water requirement for paddy fields. This represents the average daily seepage rate of the paddy field. This represents the total duration of the soaking phase. This represents the total rainfall during the paddy field soaking stage. The irrigation system is the same as during the seedling stage. In the calculation process, if the calculated... A value less than 0 indicates heavy rainfall and the need for drainage. At this point, the soil moisture content has reached saturation, and the drainage volume is [missing information]. for: (16) After this stage of calculation is completed, the irrigation quota and drainage volume for the flooding period are obtained. The final output is the farmland water depth at the end of the stage, which is the water depth required for rice transplanting. .
[0082] (4) Growth stage: This stage includes six phases: transplanting-greening, greening-tillering, tillering-jointing, jointing-booting, booting-heading, and booting-ripening. The calculation logic is the same for each phase, and the output of each phase serves as the initial state for the next phase. The calculations are performed sequentially. The input parameters required for each phase are: 1) Start and end times of each stage, measured in days; 2) Field water depth before the start of the current stage. 3) Average daily water requirement of crops per unit area ;4) Daily effective rainfall per unit area 5) Daily evaporation per unit area 6) Daily field seepage per unit area 7) Minimum depth of water layer in the field ;8) Maximum depth of water layer in the field 9) Maximum depth of field water layer allowed by rainfall ;10) The corresponding average number of irrigations at this time ;11) The minimum irrigation amount corresponding to the average irrigation at this time. .
[0083] The calculation logic for each day during the growth stage is as follows: First, calculate the field water depth at the end of each day, which is the initial water surface depth for the next day: (17) Similarly, the total amount of average irrigation needs to be initialized. Now let's make a judgment: 1) This indicates that the water depth is 0, and at this point... .
[0084] 2) At this point, the water depth is between the maximum water depth and the maximum field water depth allowed by rainfall. At this time, average irrigation should be stopped and drainage should not be carried out. Therefore, the irrigation and drainage volumes are both 0 in the current time period.
[0085] 3) At this point, the water depth exceeds the maximum permissible depth for field irrigation due to rainfall. Irrigation should be stopped, and drainage is required. The drainage volume is: (18) 4) At this point, it is necessary to determine whether the current process is in the average irrigation phase. This means that irrigation was not carried out evenly. In this case, the water depth needs to be further determined. Then irrigation is required, with an average irrigation amount of [amount missing] per session. Further assessment is needed: (19) In this formula, if the denominator is 0, it means the amount of water needed for irrigation is less than the minimum designed irrigation amount, and only one irrigation is required; in this case, the denominator is set to 1. Otherwise: (20) After determining the average irrigation amount, irrigate once and record the results. If At this point, it is within the target range and does not require irrigation or drainage.
[0086] like This indicates that average irrigation is in progress. Based on the calculated average irrigation volume, the water layer depth is updated as follows: (twenty one) This serves as the initial depth of the water layer for the next day. By calculating the daily irrigation amount for each stage according to the above process, the daily irrigation quota can be obtained. After calculating all stages, the final field water layer depth is... .
[0087] (4) Harvesting stage: During the harvesting stage, the farmland needs to be dried out, leaving only soil moisture. Therefore, before the start of this stage, excess water from the previous stage should be drained, with a drainage volume of [missing information]. The corresponding water volume, after drainage, indicates that the soil moisture has reached saturation. The total irrigation volume for the harvest stage can be calculated in one go, which can be determined by balancing water demand with rainfall, seepage, and evaporation. The irrigation quota for this stage is... for: (twenty two) This represents the total water requirement during the harvesting stage. This represents the total leakage during the harvesting stage. This represents the total evaporation during the harvesting stage. The total effective rainfall during the harvest stage is calculated for the entire growth stage of rice.
[0088] This application can determine the daily irrigation quota for major crops, and thereby estimate the total irrigation quota for each crop type over a specific time period. Using the area north and south of a certain dam in a three-level water resources zoning as examples, the calculation results of the daily irrigation quotas for various crops are presented, such as... Figures 3-6 As shown. Figures 3-6 The horizontal axis represents the time series, and the vertical axis represents the daily irrigation water volume.
[0089] This application fully considers the impact of various meteorological data, crop growth stages and irrigation systems on irrigation volume, and provides an accurate method for calculating irrigation quotas, which can support the prediction of agricultural water demand in a watershed. Currently, the scheme mentioned in this application has been applied to the watershed water resources allocation platform.
[0090] In one exemplary embodiment, a computer device is provided, which may be a server or a terminal, and its internal structure diagram may be as follows. Figure 7As shown, this computer device includes a processor, memory, input / output (I / O) interfaces, and a communication interface. The processor, memory, and I / O interfaces are connected via a system bus, and the communication interface is also connected to the system bus via the I / O interfaces. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides the environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The database stores data for determining crop irrigation quotas based on water resource allocation. The I / O interfaces are used for exchanging information between the processor and external devices. The communication interface is used for communicating with external terminals via a network. When the computer program is executed by the processor, it implements a method for determining crop irrigation quotas based on water resource allocation.
[0091] Those skilled in the art will understand that Figure 7 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.
[0092] In one exemplary embodiment, a computer device is also provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above-described method embodiments.
[0093] In one exemplary embodiment, a computer-readable storage medium is provided storing a computer program that, when executed by a processor, implements the steps in the above-described method embodiments.
[0094] In one exemplary embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the above-described method embodiments.
[0095] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.
[0096] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM).
[0097] The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, data processing logic devices, etc., and are not limited to these.
[0098] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0099] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.
Claims
1. A method for determining crop irrigation quotas based on water resource allocation, characterized in that, The method for determining crop irrigation quotas based on water resource allocation is applied to crop planting scenarios; the crops include dryland crops and rice; the planting stages of dryland crops include a pre-sowing stage and a growth stage, and the growth stage includes multiple growth stages; the planting stages of rice include a pre-sowing stage and a post-sowing stage. The post-broadcast phase includes multiple sub-phases; The method for determining crop irrigation quotas based on water resource allocation includes: Determine the target planting parameters; the target planting parameters include: the target soil moisture value before sowing and the number of days for retrospective analysis; Based on the planting target parameters, soil moisture change calculations are performed to determine the soil moisture content change before sowing and the amount of irrigation water required to meet the preset soil moisture content before sowing, so as to obtain daily irrigation quota information for the pre-sowing stage. The soil moisture content at the end of the pre-sowing stage is determined based on the changes in soil moisture content before sowing; Irrigation quotas for dryland crops and rice after sowing were determined based on the soil moisture content at the end of the pre-sowing stage.
2. The method for determining crop irrigation quotas based on water resource allocation according to claim 1, characterized in that, Irrigation quotas for dryland crop growth stages and rice post-sowing stages are determined based on soil moisture content at the end of the pre-sowing stage, specifically including: For the aforementioned drought-resistant crops: The soil moisture content at the end of the pre-sowing stage is taken as the initial soil moisture content of the first growth stage in the growth stage; wherein, for the growth stage, the soil moisture content at the end of each growth stage is taken as the initial soil moisture content of the next stage. For each growth stage, a water balance calculation is performed based on the initial soil moisture content during the start and end time periods of the stage to determine the daily irrigation quota information for the dryland crop during the growth stage. Based on the daily irrigation quota information during the pre-sowing stage and the daily irrigation quota information during the growth stage, the daily irrigation quota information for the entire life cycle of the dryland crop is determined. For rice: The soil moisture content at the end of the pre-sowing stage is used as the initial soil moisture content of the first sub-stage in the post-sowing stage; wherein, for the post-sowing stage, the soil moisture content at the end of each sub-stage is used as the initial soil moisture content of the corresponding next stage. For the post-sowing stage: when the sub-stage is the seedbed irrigation stage or the paddy field irrigation stage, the irrigation quota information and drainage volume are determined based on the corresponding initial soil moisture content, and the field water depth at the end of the corresponding paddy field irrigation stage is obtained; when the sub-stage is the growth stage, the daily irrigation volume is calculated based on the field water depth during the beginning and end of the growth stage to determine the daily irrigation quota information and the final field water depth; when the sub-stage is the harvesting stage, the farmland is dried based on the final field water depth to ensure that the soil moisture content after drying is the saturated soil moisture content, and water balance calculation is performed to obtain the irrigation quota information for the harvesting stage.
3. The method for determining crop irrigation quotas based on water resource allocation according to claim 1, characterized in that, Based on the planting target parameters, soil moisture change calculations are performed to determine the changes in soil moisture content before sowing and the amount of irrigation water required to meet the preset soil moisture content before sowing, thus obtaining daily irrigation quota information for the pre-sowing stage, specifically including: Based on the number of backtracking days in the planting target parameters, the formula is used. Soil moisture change calculations were performed to determine the changes in soil moisture content before sowing; among which... For the first Initial soil moisture content starting from day 1; For the first The initial soil moisture content of the day; For the first Effective rainfall per day; For the first Daily evaporation water volume; Plan the soil wetting depth; for The average soil bulk density within the corresponding depth; when hour, The corresponding initial soil moisture content is 0; The soil moisture content at the last time period within the retrospective period was determined based on changes in soil moisture content before sowing. Based on the pre-sowing soil moisture target value, the irrigation amount required to meet the preset soil moisture content before sowing is determined, resulting in daily irrigation quota information for the pre-sowing stage; the pre-sowing soil moisture target value includes: minimum soil moisture content. Maximum soil moisture content With saturated soil moisture content ; Among them, when At that time, water needs to be poured in all at once, if If the value is less than 0, assign it to 0; irrigate until the soil moisture content reaches the maximum soil moisture content. At this time, the irrigation quota information includes the irrigation water quota. for: ； when At this time, there is no need to fill or drain water; when When the soil moisture content reaches saturation, it will be drained as free water. After drainage, the soil moisture content will be... Discharge for: 。 4. The method for determining crop irrigation quotas based on water resource allocation according to claim 2, characterized in that, For each growth stage, a water balance calculation is performed based on the initial soil moisture content during the start and end time periods of the stage to determine the daily irrigation quota information for the dryland crop during its growth stage, specifically including: For each growth stage, the following is performed daily during the start and end periods of the stage: ； For the first Soil moisture content at the end of the corresponding time period; when At that time, the first Soil moisture content at the end of the corresponding time period The value is the average soil moisture content before the start of the current growth stage. ; It is determined based on the initial soil moisture content; This represents the average daily water requirement of crops per unit area. For the first Effective rainfall per day; For the first Daily evaporation water volume; Plan the soil wetting depth; for Average soil bulk density within the corresponding depth; For the first Groundwater recharge per unit area per day; when When the soil moisture content at the end of that period is set to 0, then the soil moisture content at the end of that period is set to 0. At this time, neither watering nor drainage is required; among them, This represents the highest soil moisture content. This represents the saturated soil moisture content. The minimum soil moisture content; when At this time, drainage is required, and the corresponding drainage volume is... for: ； Plan the soil wetting depth; for Average soil bulk density within the corresponding depth; when If the water level is 0, then no watering is needed and the watering amount is 0. when At this time, irrigation is required, and the corresponding total irrigation quota is... for: ； like The average irrigation water volume per cycle for: ； like The average irrigation water volume per cycle for: ； First irrigate according to the average irrigation amount, and then replace it at the same time. and : ； ； like Then according to renew At the same time, according to renew When the soil moisture content increases by more than [amount] at the end of the corresponding time period If average irrigation is still in progress at this time, then irrigation should be stopped and the system updated. ; in, This represents the average number of irrigations. The minimum amount of water required for average irrigation; This is the floor function; For the updated number Soil moisture content at the end of the corresponding time period; This is the updated total irrigation quota.
5. The method for determining crop irrigation quotas based on water resource allocation according to claim 2, characterized in that, For the post-sowing stage: when the sub-stage is the seedbed irrigation stage or the paddy field irrigation stage, the irrigation quota information and drainage volume are determined based on the corresponding initial soil moisture content, and the field water depth at the end of the corresponding paddy field irrigation stage is obtained, specifically including: When the sub-stage is the rice paddy irrigation stage, the corresponding irrigation quota information is... The calculation formula is: ； in, The proportion of seedling paddy field area to total paddy field area; The depth of the plow in the paddy field; for Average soil bulk density within the depth; for Soil saturation moisture content within depth; This represents the average daily water requirement for rice seedlings. This represents the average daily seepage rate in the rice paddies. This refers to the total duration of the rice seedling stage; This refers to the total rainfall during the rice seedling stage; This refers to the initial soil moisture content corresponding to the irrigation stage of the rice seedling bed. like When the soil moisture content is less than 0, the soil is saturated and drainage is required. The drainage volume... for: ； After the irrigation stage of the rice paddy is completed, the soil moisture content is the saturated soil moisture content, which is used as the soil moisture content for the next stage and is denoted as . ; When the sub-stage is the paddy field irrigation stage, the corresponding irrigation quota information is... The calculation formula is: ； in, The depth of plowing in paddy fields; for Average soil bulk density within the depth; for Soil saturation moisture content within depth; This refers to the water depth required for rice transplanting. This represents the average daily water requirement for paddy fields; This represents the average daily seepage rate of the paddy field. This represents the total duration of the soaking stage; This represents the total rainfall during the flooding phase. like When the soil moisture content is less than 0, the soil is saturated and drainage is required. The drainage volume... for: ； Irrigation quota information based on the paddy field irrigation stage and drainage volume Determine the field water depth at the end of this stage; at this point, the field water depth is the water depth required for rice transplanting. .
6. The method for determining crop irrigation quotas based on water resource allocation according to claim 2, characterized in that, When the sub-stage is the growth stage, the daily irrigation amount is calculated based on the field water depth during the start and end periods of the growth stage to determine the daily irrigation quota and the final field water depth, specifically including: For the growth stage, the final field water depth is determined based on the daily field water depth, and the daily irrigation quota is obtained based on the daily irrigation amount; the daily calculation process for the growth stage is as follows: Calculate the field water depth at the end of each day : ； in, For the first The water depth in the field at the end of the day; when hour, Values ; This refers to the water depth required for rice transplanting. For the first Effective rainfall per unit area per day; For the first Evaporation rate per unit area per day; For the first Daily field seepage rate per unit area; This represents the average daily water requirement of crops per unit area. when At that time, the water depth in the field was set to 0; when At that time, both the irrigation and drainage volumes were 0. This represents the maximum depth of the water layer in the field. This refers to the maximum depth of water layer in the field allowed by rainfall; when When the water depth exceeds the maximum permissible depth for field irrigation due to rainfall, average irrigation must be stopped and drainage required. The corresponding drainage volume is... for: ； when At that time, if the average total amount of irrigation At this time, if average irrigation is not carried out, Then water needs to be poured in; Minimum water depth in the field; average irrigation volume per session : ； otherwise After determining the average irrigation amount, irrigation is required once. At this time, there is no need to fill or drain water; like This indicates that average irrigation is in progress, and the water layer depth is being updated. And as the initial depth of the field water layer for the next day; in, This is the updated field water depth.
7. The method for determining crop irrigation quotas based on water resource allocation according to claim 2, characterized in that, Irrigation quota information during the harvesting stage The corresponding mathematical expression is: ； in, This represents the total water requirement during the harvesting stage; This represents the total leakage during the harvesting stage; This represents the total evaporation during the harvesting stage; This represents the total effective rainfall during the harvesting stage.
8. A computer device, comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor executes the computer program to implement the crop irrigation quota determination method for water resource allocation as described in any one of claims 1-7.
9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the computer program implements the crop irrigation quota determination method for water resource allocation as described in any one of claims 1-7.
10. A computer program product, comprising a computer program, characterized in that, When executed by a processor, the computer program implements the crop irrigation quota determination method for water resource allocation as described in any one of claims 1-7.