Water balance calculation methods, equipment, storage media and products

Abstract

The present invention discloses a water balance calculation method, device, storage medium, and product. The method comprises calculating the daily rainfall runoff for a representative year of a polder embankment design, the daily crop water consumption for a representative year of the polder embankment design, the daily external irrigation water volume when the existing storage space is not utilized, the daily evaporation of the polder embankment water area, and the current daily external drainage volume of the polder embankment; calculating the total storage space capacity within the polder embankment; calculating the daily irrigation and reuse water volume of the storage space; calculating the daily external irrigation water volume after accounting for storage and regulation; calculating the daily external drainage volume after accounting for storage and regulation; and generating a daily change distribution diagram of the corresponding parameter within the representative year of the design. The present invention can more scientifically and accurately calculate the daily external irrigation water volume of the polder embankment through artificial water conservancy regulation of the polder embankment, quantitatively determine the optimal storage capacity within the polder embankment, reduce the daily external drainage volume of the polder embankment, and improve the utilization rate of the polder embankment water resources.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydrology and water environment, and in particular relates to a water balance calculation method, equipment, storage medium and product suitable for embankment farmland. Background Art

[0002] The commonly used water calculation formula in farmland irrigation is: water inflow + water production = water output + evaporation + seepage + water consumption; among them, water inflow refers to the amount of water flowing into the farmland, including rainfall, external water irrigation, groundwater exchange, etc.; water production refers to the amount of water generated internally, such as groundwater recharge; water output refers to the amount of water flowing out of the farmland, including farmland drainage, water area evaporation, groundwater discharge, etc.; seepage refers to the amount of water leaking into the ground; water consumption mainly refers to the water consumption of crops in agricultural production activities.

[0003] The outer perimeter of the dike is protected by a dike, separating farmland from external water. Its daily operation regulates the flow of water through irrigation and drainage channels and the operation of sluice gates on the dike. When the field elevation is lower than the external water level, making gravity irrigation and drainage difficult, water-lifting machinery is used to meet the water needs of the farmland within the dike. When rainfall is heavy and prolonged, pumping stations are also needed to prevent waterlogging that affects agricultural production.

[0004] This suggests that current traditional methods for calculating farmland irrigation water use focus on runoff and runoff, resulting in a single water inflow and outflow. However, due to the flat terrain, complex water flows, and high levels of human controllability in polder areas, which allow for the reuse of water resources, conventional irrigation water balance calculation methods are not fully applicable to calculating irrigation water use in polder areas. Furthermore, due to the low terrain, poor hydrodynamic conditions, and dense river networks common in polder farmland, groundwater levels within the polder areas are relatively high. Furthermore, water diversion and drainage within polder areas are heavily controlled by sluice gates and other artificial mechanisms, resulting in relatively weak groundwater seepage and recharge and exchange. Summary of the Invention

[0005] The purpose of the present invention is to provide a water balance calculation method, equipment, storage medium and product to solve the problem that the traditional farmland irrigation water balance calculation method is not fully applicable to the calculation of embankment farmland irrigation water volume, resulting in inaccurate calculation of embankment farmland irrigation water volume.

[0006] The present invention solves the above technical problems through the following technical solutions: a water balance calculation method applicable to embankment farmland, comprising:

[0007] Calculate the daily rainfall runoff of the representative year of the embankment design;

[0008] Obtaining the daily crop water consumption of the representative year of the embankment design, and calculating the daily external water diversion irrigation water volume when the current storage space is not utilized based on the daily crop water consumption of the representative year of the embankment design;

[0009] Calculate the daily evaporation of the dike water area based on the dike water area and the daily evaporation of the design representative year;

[0010] Calculate the current daily external drainage volume of the embankment based on the daily rainfall runoff in the representative year of the embankment design, the daily crop water consumption in the representative year of the embankment design, and the daily evaporation of the water area of ​​the embankment;

[0011] Obtain the storage depth and storage area of ​​each storage space within the dike;

[0012] Calculating the total capacity of the storage space in the embankment according to the storage depth and storage area of ​​each storage space in the embankment;

[0013] Calculate the daily remaining water volume of the storage space and the daily water inflow change of the storage space based on the daily rainfall runoff in the representative year of the design of the embankment, the daily crop water consumption in the representative year of the design of the embankment, the daily evaporation of the water area of ​​the embankment, the daily external drainage volume of the current embankment, and the total capacity of the storage space in the embankment;

[0014] Calculating the daily irrigation reuse water volume of the storage space based on the daily crop water consumption and the daily residual water volume of the storage space in the representative year of the embankment design;

[0015] Calculate the daily external irrigation water volume after storage and regulation based on the daily crop water consumption in the representative year of the embankment design and the daily irrigation and reuse water volume of the storage space;

[0016] Calculate the daily drainage volume after storage and regulation based on the daily crop water consumption in the representative year of the embankment design, the daily rainfall runoff in the representative year of the embankment design, the daily evaporation of the embankment water area, and the daily irrigation and reuse water volume of the storage space;

[0017] Based on the daily rainfall runoff in the representative design year of the dike, the daily crop water consumption in the representative design year of the dike, the daily external irrigation water volume when the current storage space is not utilized, the daily water evaporation of the dike, the current daily external drainage volume, the daily irrigation reuse water volume of the storage space, the daily external irrigation water volume after considering storage, and the daily external drainage volume after considering storage, a daily change distribution map of the corresponding parameters in the representative design year is generated.

[0018] Furthermore, the calculation formula for the daily external discharge of the existing dike is:

[0019] Q 1i =Q 3i -Q 4i -Q 2i ;

[0020] Among them, Q 1i represents the external discharge of the existing dike on the i-th day, Q 3irepresents the rainfall runoff on the i-th day of the representative year of the embankment design, Q 4i represents the evaporation of the dike water area on day i, Q 2i represents the crop water consumption on the i-th day of the representative year of the dike design.

[0021] Furthermore, the calculation formula for the total storage capacity of the dike is:

[0022]

[0023] Where C represents the total storage capacity within the dike, unit: m 3 ;h i Indicates the storage depth of the i-th storage space, unit: m; A wi Indicates the storage area of ​​the i-th storage space, unit: m 2 ; n represents the number of storage spaces.

[0024] Furthermore, the daily remaining water volume in the storage space and the daily change in water inflow to the storage space are calculated based on the daily rainfall runoff in the representative design year of the embankment, the daily crop water consumption in the representative design year of the embankment, the daily evaporation of the water area in the embankment, the daily external drainage volume of the current embankment, and the total capacity of the storage space in the embankment, specifically including:

[0025] Determine whether the current daily external discharge of the dike is greater than or equal to 0. If so, the calculation formula for the daily change in water inflow to the storage space is:

[0026] Δ i =min(Q 3i -Q 2i -Q 4i ,C-CR i );

[0027] Otherwise, the calculation formula for the daily change in water inflow to the storage space is:

[0028] Δ i =-min(Q 2i +Q 4i -Q 3i ,CR i );

[0029] Among them, Δ i represents the change in water inflow to the storage space on day i, Q 3i represents the rainfall runoff on the i-th day of the representative year of the embankment design, Q 2i represents the crop water consumption on the i-th day of the representative year of the embankment design, Q 4i represents the evaporation of the water area on the i-th day of the dike, C represents the total storage capacity of the dike, CR i represents the remaining water volume of the storage space on day i; wherein, the calculation formula for the remaining water volume of the storage space on a daily basis is:

[0030] CR i =min(C,CR i-1 +Δ i-1 );

[0031] Among them, CR i-1 Indicates the remaining water volume in the storage space on day i-1. The initial value of the remaining water volume in the storage space on a daily basis is 0; Δ i-1 Indicates the change in water inflow to the storage space on day i-1.

[0032] Furthermore, the calculation formula for the daily irrigation reuse water volume of the storage space is:

[0033] Q 6i =min(Q 2i ,CR i );

[0034] Among them, Q 6i represents the irrigation reuse water consumption of the storage space on day i, Q 2i represents the crop water consumption on the i-th day of the representative year of the embankment design, CR i Indicates the remaining water volume in the storage space on day i.

[0035] Furthermore, the calculation formula for the daily external water diversion irrigation water volume after considering storage and regulation is:

[0036]

[0037] Among them, Q' 5i represents the amount of irrigation water diverted from outside on the i-th day after storage and regulation, η represents the water utilization coefficient, Q 6i represents the irrigation reuse water consumption of the storage space on day i, Q 2i represents the crop water consumption on the i-th day of the representative year of the dike design.

[0038] Furthermore, the daily external discharge volume Q' after storage and regulation is considered 1i , the specific calculation formula is:

[0039] Q' 1i =Q 3i -Q 4i -Q 2i -Q 6i ;

[0040] Among them, Q' 1i represents the amount of water discharged on the ith day after storage and regulation, Q 3i represents the rainfall runoff on the i-th day of the representative year of the embankment design, Q 4i represents the evaporation of the dike water area on day i, Q 2i represents the crop water consumption on the i-th day of the representative year of the embankment design, Q 6irepresents the irrigation reuse water volume of the storage space on day i; when Q' 1i When <0, take Q' 1i =0.

[0041] Based on the same concept, the present invention also provides an electronic device, including a memory, a processor, and a computer program / instruction stored in the memory, wherein the processor executes the computer program / instruction to implement the water balance calculation method as described above.

[0042] Based on the same concept, the present invention also provides a computer-readable storage medium having a computer program / instruction stored thereon, which implements the water balance calculation method described above when the computer program / instruction is executed by a processor.

[0043] Based on the same concept, the present invention also provides a computer program product, including a computer program / instruction, which implements the water balance calculation method described above when executed by a processor.

[0044] Beneficial effects

[0045] Compared with the prior art, the advantages of the present invention are:

[0046] The present invention can more scientifically and accurately calculate the daily external irrigation water volume of the dike through artificial water conservancy scheduling of the dike, quantitatively determine the optimal storage capacity within the dike, and reduce the daily external drainage volume of the dike, thereby improving the utilization rate of the dike water resources, providing technical support for designers in subsequent dike water scheduling work, and effectively improving the irrigation water utilization coefficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only one embodiment of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0048] Figure 1 This is a flow chart of a water balance calculation method according to an embodiment of the present invention;

[0049] Figure 2 Schematic diagram of daily rainfall runoff in a representative year of the embankment design according to an embodiment of the present invention;

[0050] Figure 3 1 is a schematic diagram of daily crop water consumption in a representative year of the embankment design according to an embodiment of the present invention;

[0051] Figure 4 Schematic diagram of daily evaporation of water area in a dike according to an embodiment of the present invention;

[0052] Figure 5 Schematic diagram of the daily external discharge of the existing dike in the embodiment of the present invention;

[0053] Figure 6 Schematic diagram of daily irrigation reuse water consumption in the storage space according to an embodiment of the present invention;

[0054] Figure 7 Schematic diagram of daily external irrigation water volume after considering storage and regulation in an embodiment of the present invention;

[0055] Figure 8 This is a schematic diagram of daily external discharge volume after storage and regulation in an embodiment of the present invention. DETAILED DESCRIPTION

[0056] The following is a clear and complete description of the technical solutions of the present invention in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts are within the scope of protection of the present invention.

[0057] The following specific embodiments are used to describe the technical solution of the present application in detail. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0058] Example 1

[0059] like Figure 1 As shown, the embodiment of the present invention provides a water balance calculation method applicable to embankment farmland, comprising the following steps:

[0060] Step 1: Calculate the daily rainfall runoff Q for the representative year of the embankment design 3i .

[0061] The rainfall data of the series of rain gauges in the weir area were collected and sorted according to the frequency of occurrence, and the typical year corresponding to the frequency of 50% was selected as the design representative year.

[0062] Through on-site investigation, discussion and visit, land space data collection, etc., with reference to the "Hydrological Calculation Specification for Water Conservancy and Hydropower Projects" (SL278-2020) and the "Hydraulic Calculation Specification for Water Conservancy Projects" (SL104-2015), based on basic data such as rainfall data, underlying surface composition, and catchment area, the daily rainfall runoff Q of the representative year of the design of the embankment was calculated. 3i (i.e., the daily rainfall runoff in the representative year of the embankment design). Calculate the daily rainfall runoff Q in the representative year of the embankment design using the hydrological analogy method. 3i , the specific calculation process is the existing technology.

[0063] Step 2: Obtain the daily crop water consumption Q for the representative year of the embankment design 2i , and according to the daily crop water consumption Q of the representative year of the embankment design 2i Calculate the daily external irrigation water volume Q when the storage space is not used 5i .

[0064] Collect the main crop planting system and irrigation data of the embankment (such as long series flow data of gate operation), sort and accumulate them according to the gate operation time, and obtain the daily crop water consumption Q of the representative year of the embankment design 2i If irrigation data are not collected, the daily irrigation quota published by the local irrigation experimental station shall be used as the daily crop water consumption Q for the representative year of the embankment design. 2i .

[0065] According to the "Irrigation and Drainage Engineering Design Standard" (GB50288-2018), the daily external water diversion irrigation water volume Q when the current storage space is not used is: 5i It is the amount of water that the dike needs to take from external water sources (such as external rivers, pumping stations, etc.) when the rainfall runoff does not meet the water needs of farmland irrigation. In this embodiment, the daily external water diversion irrigation water volume Q 5i The calculation formula is:

[0066] Q 5i =η×Q 2i (1)

[0067] Among them, Q 5i represents the amount of external irrigation water on the i-th day when the storage space is not used, η represents the water utilization coefficient, Q 2i represents the crop water consumption on the i-th day of the representative year of the dike design.

[0068] Step 3: Calculate the daily evaporation of the dike area Q based on the dike area and the daily evaporation of the design representative year. 4i .

[0069] The daily evaporation of the dike was calculated by collecting long-term daily evaporation data from the meteorological station and combining it with the land space survey data. 4i In this embodiment, the calculation formula for the daily evaporation of the dike water area is:

[0070] Q 4i =E i ×A w ×10 -3 (2)

[0071] Among them, Q 4i Indicates the evaporation of the water area of ​​the embankment on day i (such as ditches, ponds, internal rivers, etc. within the embankment), unit: m 3;E i Indicates the evaporation on the i-th day of the design representative year, unit: mm; A w Indicates the area of ​​the dike water area (such as ditches, ponds, internal rivers, etc.) in m 2 .

[0072] Step 4: Design the daily rainfall runoff Q of the representative year based on the dike 3i , Daily crop water consumption Q in a representative year of embankment design 2i and the daily evaporation of the dike water area Q 4i Calculate the daily external discharge volume Q of the existing dike 1i .

[0073] Ignoring the impact of groundwater, referring to the traditional agricultural irrigation water balance calculation method, the current daily drainage volume Q of the dike is calculated. 1i The total annual drainage volume is calculated by accumulating the water volume. In this embodiment, the calculation formula for the daily drainage volume of the existing embankment is:

[0074] Q 1i =Q 3i -Q 4i -Q 2i (3)

[0075] Among them, Q 1i Indicates the amount of water discharged from the existing dike on the i-th day, unit: m 3 ;Q 3i Indicates the rainfall runoff on the i-th day of the representative year of the design of the embankment, unit: m 3 ;Q 4i Indicates the evaporation of the water area of ​​the embankment on the i-th day, unit: m 3 ;Q 2i Indicates the crop water consumption on the i-th day of the representative year of the embankment design, unit: m 3 .

[0076] Step 5: Obtain the storage depth and storage area of ​​each storage space within the dike.

[0077] Through on-site surveys, discussions, and interviews, the layout of available storage spaces within the dikes (e.g., ditches, ponds, and internal waterways) was analyzed, combined with irrigation and drainage routes. Based on the minimum water depth requirements for each storage space and the dike's drainage requirements, the storage depth and area of ​​each storage space within the dike were determined. The storage depth is equal to the drainage depth minus the ecological water demand depth. The drainage depth is determined according to the dike's scheduling and operation plan, generally calculated from the water level in the forebay of the external drainage pumping station. The ecological water demand depth is the minimum requirement for aquatic plant growth.

[0078] Step 6: Calculate the total capacity C of the storage space within the dike based on the storage depth and storage area of ​​each storage space within the dike.

[0079] In this embodiment, the calculation formula for the total storage capacity of the dike is:

[0080]

[0081] Where C represents the total storage capacity within the dike, unit: m 3 ;h i Indicates the storage depth of the i-th storage space, unit: m; A wi Indicates the storage area of ​​the i-th storage space, unit: m 2 ; n represents the number of storage spaces.

[0082] Step 7: In order to analyze the water balance of the dike after storage and regulation, the daily rainfall runoff Q of the representative year of the dike design is calculated. 3i , Daily crop water consumption Q in a representative year of embankment design 2i , daily evaporation of dike water area Q 4i , Current daily discharge volume of dikes Q 1i And the total capacity of the storage space C in the dike is used to calculate the daily remaining water volume CR in the storage space i and the daily change in water inflow to the storage space Δ i .

[0083] In a specific embodiment of the present invention, the daily rainfall runoff Q of the representative year is designed according to the embankment. 3i , Daily crop water consumption Q in a representative year of embankment design 2i , daily evaporation of dike water area Q 4i , Current daily discharge volume of dikes Q 1i And the total capacity of the storage space C in the dike is used to calculate the daily remaining water volume CR in the storage space i and the daily change in water inflow to the storage space Δ i , specifically including:

[0084] When Q 1i =Q 3i -Q 4i -Q 2i When ≥0, it indicates that the rainfall runoff on that day is surplus, and part of the rainfall runoff enters the storage space through the reuse pump station and other forms of drainage. When the storage space is full, the reuse pump station is closed and the excess water is discharged. At this time, the calculation formula for the daily water inflow change in the storage space is:

[0085] Δ i =min(Q 3i -Q 2i -Q 4i ,C-CR i ) (5)

[0086] When Q 1i =Q 3i -Q4i -Q 2i When <0, it indicates that the rainfall on that day does not meet the irrigation demand, and the water in the storage space needs to be reused for irrigation. When the water level in the storage space is lower than the ecological water level, the reuse channel is closed. At this time, the calculation formula for the daily water change in the storage space is:

[0087] Δ i =-min(Q 2i +Q 4i -Q 3i ,CR i ) (6)

[0088] Among them, Δ i represents the change in water inflow to the storage space on day i, Q 3i represents the rainfall runoff on the i-th day of the representative year of the embankment design, Q 2i represents the crop water consumption on the i-th day of the representative year of the embankment design, Q 4i represents the evaporation of the water area on the i-th day of the dike, C represents the total storage capacity of the dike, CR i Represents the remaining water volume of the storage space on day i. In this embodiment, the calculation formula for the remaining water volume of the storage space on a daily basis is:

[0089] CR i =min(C,CR i-1 +Δ i-1 ) (7)

[0090] Among them, CR i-1 Indicates the remaining water volume of the storage space on the i-1th day. The initial value of the remaining water volume of the storage space on a daily basis is 0, that is, CR1 = 0; Δ i-1 Indicates the change in water inflow to the storage space on day i-1.

[0091] Step 8: Design the daily crop water consumption Q for a representative year based on the embankment design 2i and the daily remaining water volume CR of the storage space i Calculate the daily irrigation reuse water consumption Q of the storage space 6i , the specific calculation formula is:

[0092] Q 6i =min(Q 2i ,CR i ) (8)

[0093] Among them, Q 6i It represents the irrigation reuse water volume of the storage space on day i.

[0094] Step 9: Design the daily crop water consumption Q for a representative year based on the embankment design 2i And the daily irrigation reuse water volume Q of the storage space 6i Calculate the daily external irrigation water volume Q' after considering storage and regulation5i , the specific calculation formula is:

[0095]

[0096] Among them, Q' 5i represents the amount of irrigation water diverted from outside on the i-th day after storage and regulation, and η represents the water utilization coefficient.

[0097] Step 10: Design the daily crop water consumption Q for a representative year based on the embankment design 2i , Daily rainfall runoff Q in the representative year of the embankment design 3i , daily evaporation of dike water area Q 4i And the daily irrigation reuse water volume Q of the storage space 6i Calculate the daily discharge volume Q' after considering storage and regulation 1i , the specific calculation formula is:

[0098] Q' 1i =Q 3i -Q 4i -Q 2i -Q 6i (10)

[0099] Among them, Q' 1i It represents the external discharge volume on the i-th day after storage. 1i When <0, take Q' 1i =0.

[0100] Step 11: Design the daily rainfall runoff Q for a representative year based on the dike 3i , Daily crop water consumption Q in a representative year of embankment design 2i , the amount of irrigation water diverted daily when the storage space is not used Q 5i , daily evaporation of dike water area Q 4i , Current daily discharge volume of dikes Q 1i , Daily irrigation reuse water volume Q in storage space 6i , Considering the daily external irrigation water volume Q' after regulation 5i And considering the daily discharge volume Q' after storage 1i Generate a daily change distribution graph of the corresponding parameters in the design representative year.

[0101] The daily rainfall runoff Q of the representative year of the design of the dike 3i , Daily crop water consumption Q in a representative year of embankment design 2i , the amount of irrigation water diverted daily when the storage space is not used Q 5i , daily evaporation of dike water area Q 4i , Current daily discharge volume of dikes Q 1i , Daily irrigation reuse water volume Q in storage space 6i, Considering the daily external irrigation water volume Q' after regulation 5i And considering the daily discharge volume Q' after storage 1i By accumulating the data for the whole year, we can get the total values ​​of indicators such as the annual drainage volume, external irrigation water volume, and irrigation reuse water volume.

[0102] Example 2

[0103] This example is based on a comprehensive water environment management project in a certain area. The area is a typical weir in the Chaohu Lake area with a total area of ​​135.42 km. 2 , of which 90.33km2 of cultivated land 2 Other land use types are shown in Table 1. The external water system of the large polder in this area is primarily composed of rivers and lakes, while the internal water system is primarily composed of ditches, ponds, and internal waterways. The internal and external water systems are connected through intake gates and pumping stations. The polder area is flat, with poor water mobility and a high degree of artificial control over water exchange. Irrigation water is primarily drawn from the external water system via intake gates, and drainage is discharged to the external water system via pumping stations.

[0104] Table 1 Land use types in a certain area

[0105] Land classification unit quantity Proportion arable land <![CDATA[km 2 ]]> 90.34 66.70％ woodland <![CDATA[km 2 ]]> 0.98 0.70％ Construction land for urban and rural residential areas <![CDATA[km 2 ]]> 17.47 12.90％ Water land <![CDATA[km 2 ]]> 8.29 6.10％ Green space <![CDATA[km 2 ]]> 1.17 0.90％ Other land use <![CDATA[km 2 ]]> 17.17 12.60％ total <![CDATA[km 2 ]]> 135.42 100％

[0106] The rainfall data of the hydrological stations near Dawei from 1967 to 2020 were collected and sorted. After frequency analysis, the typical year with 50% frequency, 2011, was selected as the design representative year. With reference to the runoff data of the hydrological stations, combined with the basic data such as the annual rainfall data of the design representative year, the underlying surface composition, and the catchment area, the daily rainfall runoff Q in the design representative year (i.e., 2011) within the embankment was calculated. 3i ,like Figure 2 Shown (unit: m 3 ).

[0107] The main planting structure of the Dawei area is "one rice and one wheat". There are 49 main irrigation inlet gates in the wei area. The long series flow data and operation time of the 49 irrigation inlet gates were collected to calculate the daily crop water consumption Q of the representative year of the wei embankment design. 2i ,like Figure 3 Shown (unit: m 3 ).

[0108] Through statistical data analysis, the total area of ​​the large embankment waters in this area is 3708 mu. Based on the meteorological station data from 1967 to 2020, the daily evaporation of the embankment waters Q is calculated according to formula (2): 4i ,like Figure 4 Shown (unit: m 3 ).

[0109] Ignoring the impact of groundwater, referring to the traditional agricultural irrigation water balance calculation method, the current daily drainage volume Q of the dike is calculated. 1i ,like Figure 5 Shown (unit: m 3 ).

[0110] Through on-site investigation, discussion and visits, and in combination with irrigation and drainage routes, the layout of available storage space within the dike (ditches, ponds, internal rivers, etc.) was sorted out. Ditch area 866710m 2 , the pond area is 4533560m 2 , the internal river area is 1666675m 2 .

[0111] The storage depth of each storage space is determined based on the minimum water depth requirements of each storage space and the drainage requirements of the dike. The storage depth of the ditch is 0.48m, the storage depth of the pond is 0.36m, and the storage depth of the inland river is 0.95m. According to formula (4), the total storage capacity C of the dike is 4.5148 million m 3 .

[0112] According to the relationship between daily rainfall runoff and daily crop water consumption, and the current daily external drainage volume and external drainage conditions of the existing embankment, the daily water change in the storage space is calculated, and finally Q is calculated. 6i and Q' 5i , Q 6i and Q' 5i The calculation results are as follows Figure 6 and Figure 7 shown.

[0113] Under the design representative year operating conditions, considering the reuse of external drainage, according to the water balance calculation formula (10), the daily external drainage volume Q' after considering storage is calculated. 1i ,like Figure 8 shown.

[0114] Table 2 Water resource balance analysis table for a representative year of large-scale design in a certain area

[0115]

[0116] according to Figures 2 to 8 The calculation results are summarized and compared under the current working conditions (i.e., without considering the reuse working condition balance condition) and the irrigation reuse working condition balance condition, the annual cumulative values ​​of the external irrigation water volume and the external drainage water volume are shown in Table 2. After considering the irrigation reuse working condition, the design representative annual drainage volume is reduced by 16.4596 million m 3 , a decrease of 35.10%; the design represents a reduction of 21.7398 million m3 of external water diversion irrigation water per year. 3 , a decrease of 58.53%.

[0117] Example 3

[0118] An embodiment of the present invention further provides an electronic device comprising: a memory, a processor, and a computer program / instructions stored in the memory, wherein the processor executes the computer program / instructions to implement the water balance calculation method in the embodiment of the present application.

[0119] Although not shown, the electronic device includes a processor that can perform various appropriate operations and processes based on programs and / or data stored in a read-only memory (ROM) or programs and / or data loaded from a storage portion into a random access memory (RAM). The processor can be a multi-core processor or can include multiple processors. In some embodiments, the processor can include a general-purpose main processor and one or more special coprocessors, such as a central processing unit, a graphics processing unit (GPU), a neural network processor (NPU), a digital signal processor (DSP), etc. Various programs and data required for device operation are also stored in RAM. The processor, ROM, and RAM are connected to each other via a bus. An input / output (I / O) interface is also connected to the bus.

[0120] The processor and memory are used together to execute the program / instructions stored in the memory. When the program / instructions are executed by the computer, the methods, steps or functions described in the above embodiments can be implemented.

[0121] Although not shown, an embodiment of the present invention further provides a computer-readable storage medium having a computer program / instruction stored thereon. When the computer program / instruction is executed by a processor, the water balance calculation method in the embodiment of the present application is implemented.

[0122] Storage media in embodiments of the present invention include permanent and non-permanent, removable and non-removable items that can be used to store information using any method or technology. Examples of storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device.

[0123] Computer-readable storage media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. The information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, magnetic disk storage or other magnetic storage devices, or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include transitory media such as modulated data signals and carrier waves.

[0124] Although not shown, an embodiment of the present invention further provides a computer program product, including: a computer program / instruction, which, when executed by a processor, implements the water balance calculation method in the embodiment of the present application.

[0125] The above disclosure is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field can easily think of changes or modifications within the technical scope disclosed in the present invention, and they should all be covered by the scope of protection of the present invention.

Claims

1. A water balance calculation method applicable to embankment farmland, characterized in that: The calculation method includes: Calculate the daily rainfall runoff of the representative year of the embankment design; Obtaining the daily crop water consumption of the representative year of the embankment design, and calculating the daily external water diversion irrigation water volume when the current storage space is not utilized based on the daily crop water consumption of the representative year of the embankment design; Calculate the daily evaporation of the dike water area based on the dike water area and the daily evaporation of the design representative year; Calculate the current daily external drainage volume of the embankment based on the daily rainfall runoff in the representative year of the embankment design, the daily crop water consumption in the representative year of the embankment design, and the daily evaporation of the water area of ​​the embankment; Obtain the storage depth and storage area of ​​each storage space within the dike; Calculating the total capacity of the storage space in the embankment according to the storage depth and storage area of ​​each storage space in the embankment; Calculate the daily remaining water volume of the storage space and the daily water inflow change of the storage space based on the daily rainfall runoff in the representative year of the design of the embankment, the daily crop water consumption in the representative year of the design of the embankment, the daily evaporation of the water area of ​​the embankment, the daily external drainage volume of the current embankment, and the total capacity of the storage space in the embankment; Calculating the daily irrigation reuse water volume of the storage space based on the daily crop water consumption and the daily residual water volume of the storage space in the representative year of the embankment design; Calculate the daily external irrigation water volume after storage and regulation based on the daily crop water consumption in the representative year of the embankment design and the daily irrigation and reuse water volume of the storage space; Calculate the daily drainage volume after storage and regulation based on the daily crop water consumption in the representative year of the embankment design, the daily rainfall runoff in the representative year of the embankment design, the daily evaporation of the embankment water area, and the daily irrigation and reuse water volume of the storage space; Based on the daily rainfall runoff in the representative design year of the dike, the daily crop water consumption in the representative design year of the dike, the daily external irrigation water volume when the current storage space is not utilized, the daily water evaporation of the dike, the current daily external drainage volume, the daily irrigation reuse water volume of the storage space, the daily external irrigation water volume after considering storage, and the daily external drainage volume after considering storage, a daily change distribution map of the corresponding parameters in the representative design year is generated.

2. The water balance calculation method according to claim 1, characterized in that: The calculation formula for the daily external discharge of the existing dike is: Q 1i =Q 3i -Q 4i -Q 2i ; Among them, Q 1i represents the external discharge of the existing dike on the i-th day, Q 3i represents the rainfall runoff on the i-th day of the representative year of the embankment design, Q 4i represents the evaporation of the dike water area on day i, Q 2i represents the crop water consumption on the i-th day of the representative year of the dike design.

3. The water balance calculation method according to claim 1, characterized in that: The calculation formula for the total storage capacity of the dike is: Where C represents the total storage capacity within the dike, unit: m 3 ;h i Indicates the storage depth of the i-th storage space, unit: m; A wi Indicates the storage area of ​​the i-th storage space, unit: m 2 ; n represents the number of storage spaces.

4. The water balance calculation method according to claim 1, characterized in that: The daily residual water volume of the storage space and the daily water inflow change of the storage space are calculated based on the daily rainfall runoff in the representative year of the design of the embankment, the daily crop water consumption in the representative year of the design of the embankment, the daily evaporation of the water area of ​​the embankment, the daily external drainage volume of the current embankment, and the total capacity of the storage space in the embankment, specifically including: Determine whether the current daily external discharge of the dike is greater than or equal to 0. If so, the calculation formula for the daily change in water inflow to the storage space is: Δ i =min(Q 3i -Q 2i -Q 4i ,C-CR i ); Otherwise, the calculation formula for the daily change in water inflow to the storage space is: Δ i =-min(Q 2i +Q 4i -Q 3i ,CR i ); Among them, Δ i represents the change in water inflow to the storage space on day i, Q 3i represents the rainfall runoff on the i-th day of the representative year of the embankment design, Q 2i represents the crop water consumption on the i-th day of the representative year of the embankment design, Q 4i represents the evaporation of the water area on the i-th day of the dike, C represents the total storage capacity of the dike, CR i represents the remaining water volume of the storage space on day i; wherein, the calculation formula for the remaining water volume of the storage space on a daily basis is: CR i =min(C,CR i-1 +Δ i-1 ); Among them, CR i-1 Indicates the remaining water volume in the storage space on day i-1. The initial value of the remaining water volume in the storage space on a daily basis is 0; Δ i-1 Indicates the change in water inflow to the storage space on day i-1.

5. The water balance calculation method according to claim 1, characterized in that: The calculation formula for the daily irrigation and reuse water volume of the storage space is: Q 6i =min(Q 2i ,CR i ); Among them, Q 6i represents the irrigation reuse water consumption of the storage space on day i, Q 2i represents the crop water consumption on the i-th day of the representative year of the embankment design, CR i Indicates the remaining water volume in the storage space on day i.

6. The water balance calculation method according to claim 1, characterized in that: The calculation formula for the daily external irrigation water volume after considering storage and regulation is: Among them, Q' 5i represents the amount of irrigation water diverted from outside on the i-th day after storage and regulation, η represents the water utilization coefficient, Q 6i represents the irrigation reuse water consumption of the storage space on day i, Q 2i represents the crop water consumption on the i-th day of the representative year of the dike design.

7. The water balance calculation method according to any one of claims 1 to 6, characterized in that: The daily external discharge volume Q' after considering storage 1i , the specific calculation formula is: Q' 1i =Q 3i -Q 4i -Q 2i -Q 6i ; Among them, Q' 1i represents the amount of water discharged on the ith day after storage and regulation, Q 3i represents the rainfall runoff on the i-th day of the representative year of the embankment design, Q 4i represents the evaporation of the dike water area on day i, Q 2i represents the crop water consumption on the i-th day of the representative year of the embankment design, Q 6i represents the irrigation reuse water volume of the storage space on day i; when Q' 1i When <0, take Q' 1i =0.

8. An electronic device comprising a memory, a processor, and a computer program / instruction stored in the memory, characterized in that: The processor executes the computer program / instructions to implement the water balance calculation method according to any one of claims 1 to 7.

9. A computer-readable storage medium having a computer program / instruction stored thereon, characterized in that: When the computer program / instructions are executed by a processor, the water balance calculation method according to any one of claims 1 to 7 is implemented.

10. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instructions are executed by a processor, the water balance calculation method according to any one of claims 1 to 7 is implemented.

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