Water balance calculation method and device, storage medium and product

Abstract

The invention discloses a water balance calculation method and device, a storage medium and a product. The method comprises the following steps: calculating day-by-day rainfall runoff of a polder design representative year, day-by-day crop water consumption of the polder design representative year, day-by-day water diversion irrigation water amount when a regulation and storage space is not utilized currently, day-by-day water area evaporation amount of the polder and day-by-day water discharge amount of the polder currently; calculating the total capacity of a regulation and storage space in a polder; calculating day-by-day irrigation reuse water amount of the regulation and storage space; calculating and considering day-by-day external water diversion irrigation water quantity after regulation and storage; calculating and considering day-by-day external displacement after regulation and storage; and generating a day-by-day change distribution diagram of the corresponding parameters in the design representative year according to the calculation results of the parameters. Through manual water conservancy scheduling of the polder, the day-by-day water diversion irrigation water amount of the polder can be more scientifically and accurately calculated, the optimal regulation and storage capacity in the polder is quantitatively determined, the day-by-day water discharge amount of the polder is reduced, and the water resource utilization rate of the polder is improved.

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 + leakage + 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.; leakage 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 embankment is protected by a embankment, which separates farmland from external water. Its daily operation mode is to regulate the inflow and outflow of internal and external water through irrigation and drainage canals and the operation of sluice gates on the embankment. When the field surface elevation is lower than the external water level and gravity irrigation and drainage are difficult, water-lifting machinery is used to meet the water needs of farmland in the embankment; when the rainfall is too heavy and lasts for a long time, in order to avoid waterlogging affecting agricultural production, pumping stations are also needed to pump water out.

[0004] It can be seen that the current traditional method of calculating farmland irrigation water volume focuses on the calculation of runoff, and the inflow and outflow of water are single. However, the terrain of the embankment is flat, the flow direction is complex, and the artificial controllability is high, which can realize the reuse of water resources. The ordinary method of calculating the balance of farmland irrigation water volume is not completely applicable to the calculation of farmland irrigation water volume in the embankment area. At the same time, due to the low terrain, poor hydrodynamic conditions, and dense river network of the embankment farmland, the groundwater level in the embankment is relatively high. At the same time, the water diversion and drainage of the embankment are highly controlled by the gate station, and the effects of groundwater leakage and recharge exchange are relatively weak. Summary of the invention

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

[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 according to the daily crop water consumption of the representative year of the embankment design;

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

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

[0011] Obtain the regulation depth and regulation area of ​​each regulation space in 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 residual water volume of the regulating storage space and the daily water inflow change of the regulating storage space according to the daily rainfall runoff volume of the representative year of the embankment design, the daily crop water consumption volume of the representative year of the embankment design, the daily evaporation volume of the embankment water area, the daily external drainage volume of the current embankment, and the total capacity of the regulating storage space in the embankment;

[0014] Calculate the daily irrigation reuse water consumption of the storage space according to the daily crop water consumption of the representative year of the embankment design and the daily residual water in the storage space;

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

[0016] The daily external drainage after storage and regulation is calculated 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 year of the dike design, the daily crop water consumption in the representative year of the dike design, the daily external irrigation water volume when the current storage space is not utilized, the daily evaporation of the dike water area, 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 year of the design is generated.

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

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

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

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

[0022]

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

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

[0025] Determine whether the current daily external drainage volume of the dike is greater than or equal to 0. If so, the calculation formula for the daily water inflow change in 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 the i-th day, Q 3i represents the rainfall runoff on the ith 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 of ​​the embankment on the i-th day, C represents the total storage capacity of the embankment, CR i represents the remaining water volume of the regulating and storing space on the i-th day; wherein, the calculation formula for the remaining water volume of the regulating and storing 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 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; Δ i-1 Indicates the change in water inflow to the storage space on the i-1th day.

[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 volume of the storage space on the i-th day, Q 2i represents the crop water consumption on the ith day of the representative year of the embankment design, CR i It represents the remaining water volume in the storage space on the i-th day.

[0035] Furthermore, the calculation formula for the daily external irrigation water volume after 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 regulation, η represents the water utilization coefficient, Q 6i represents the irrigation reuse water volume of the storage space on the i-th day, Q 2i It represents the crop water consumption on the i-th day in the representative year of the dike design.

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

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

[0040] Among them, Q' 1i represents the external discharge volume on the ith day after storage and regulation, Q 3i represents the rainfall runoff on the ith day of the representative year of the embankment design, Q 4i represents the evaporation of the embankment water area on the i-th day, 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 the i-th day; 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 on which a computer program / instruction is stored. When the computer program / instruction is executed by a processor, the water balance calculation method as described above is implemented.

[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 as 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 water resources in the dike, 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 drawings required for use in the description of the embodiments will be briefly introduced below. 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 creative work.

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

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

[0050] Figure 3 Schematic diagram of daily crop water consumption in a representative year of the embankment design in an embodiment of the present invention;

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

[0052] Figure 5 Schematic diagram of the daily external discharge of the existing embankment 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 regulation and storage in an embodiment of the present invention;

[0055] Figure 8 It 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 in the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] The technical solution of the present application is described in detail with specific embodiments below. 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, a water balance calculation method applicable to embankment farmland provided by an embodiment of the present invention comprises 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 rainfall stations 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 representative year for design.

[0062] Through on-site investigation, discussion and visit, land and space data collection, etc., with reference to the "Hydrological Calculation Specification for Water Conservancy and Hydropower Projects" (SL278-2020) and "Hydraulic Calculation Specification for Water Conservancy Projects" (SL104-2015), according to basic data such as rainfall data, underlying surface composition, and catchment area, the daily rainfall runoff Q of the representative year of the embankment design is calculated. 3i (i.e., the daily rainfall runoff of the representative year of the embankment design). Calculate the daily rainfall runoff Q of the representative year of the embankment design according to 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 current 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 of the representative year of the embankment design. 2i .

[0065] Referring 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 embankment needs to take from external water sources (such as external rivers, pumping stations, etc.) every day when the rainfall runoff does not meet the water needs for farmland irrigation. In this embodiment, the amount of water Q that is drawn from external sources for irrigation when the storage space is not used is 5i The calculation formula is:

[0066] Q 5i =η×Q 2i (1)

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

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

[0069] The daily evaporation of the dike is 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 the i-th day (such as ditches, ponds, internal rivers, etc. in 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 embankment waters (such as ditches, ponds, internal rivers, etc. within the embankment), unit: m 2 .

[0072] Step 4: Design the daily rainfall runoff Q of a representative year based on the embankment 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 external drainage volume Q of the dike is calculated 1i The total annual external drainage volume is accumulated and obtained. In this embodiment, the calculation formula for the daily external drainage volume of the current embankment is:

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

[0075] Among them, Q 1i Indicates the current external drainage volume of the dike on the ith day, unit: m 3 ;Q 3i Indicates the rainfall runoff on the i-th day of the representative year of the embankment design, 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 ith 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 investigation, discussion and visits, combined with irrigation and drainage routes, the layout of available storage space in the embankment (such as ditches, ponds, internal rivers, etc.) was sorted out, and the storage depth and storage area of ​​each storage space in the embankment were obtained according to the minimum water depth requirements of each storage space and the drainage requirements of the embankment. The storage depth is equal to the drainage depth minus the ecological water demand depth. The drainage depth is determined according to the embankment scheduling and operation plan, generally calculated by the water level in the forebay of the external drainage pump station, and the ecological water demand depth is the minimum requirement for the growth of aquatic plants.

[0078] Step 6: Calculate the total capacity C of the storage space in the dike according to the storage depth and storage area of ​​each storage space in the dike.

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

[0080]

[0081] Where C represents the total storage capacity of the dike, unit: m 3 ;h i Indicates the storage depth of the i-th storage space, unit: m; A wi Represents 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 embankment after regulation, the daily rainfall runoff Q of the representative year of the embankment 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 、The 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 residual water volume CR of 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, according to the daily rainfall runoff Q of the representative year of the embankment design, 3i , Daily crop water consumption Q in a representative year of embankment design 2i , Daily evaporation of dike water area Q 4i 、The current daily external discharge volume of the dike Q 1i And the total capacity of the storage space C in the dike is used to calculate the daily residual water volume CR of the storage space i and the daily change in water inflow to the storage space Δ i , including:

[0084] When Q 1i =Q 3i -Q 4i -Q 2i When ≥0, it indicates that the rainfall runoff volume is surplus on that day, 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 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 the i-th day, Q 3i represents the rainfall runoff on the ith 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 of ​​the embankment on the i-th day, C represents the total storage capacity of the embankment, CR i In this embodiment, the calculation formula for the daily remaining water volume in the regulating and storing space 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 the i-1th day.

[0091] Step 8: Design daily crop water consumption Q for a representative year based on the embankment 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 the i-th day.

[0094] Step 9: Design 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 irrigation water volume Q' after considering regulation and storage5i , 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 regulation and storage, and η represents the water utilization coefficient.

[0097] Step 10: Design 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 external discharge Q' after considering regulation and storage 1i , the specific calculation formula is:

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

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

[0100] Step 11: Design the daily rainfall runoff Q of a representative year based on the embankment 3i , Daily crop water consumption Q in a representative year of embankment design 2i , the current daily external irrigation water volume Q when the storage space is not used 5i , Daily evaporation of dike water area Q 4i 、The 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 external discharge after regulation Q' 1i Generate a distribution graph of daily changes 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 current daily external irrigation water volume Q when the storage space is not used 5i , Daily evaporation of dike water area Q 4i 、The 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 external discharge after regulation Q' 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 90.33km is cultivated land 2 , and other land use types are shown in Table 1. The external water system of the large embankment in this area is mainly composed of rivers and lakes, and the internal water system is mainly composed of ditches, ponds and internal rivers. The internal water system is connected to the external water system through water intake gates and pumping stations. The embankment area has a flat terrain, poor water mobility, and a high degree of artificial control over water exchange. Irrigation water is mainly diverted through water intake gates to divert water from the external water system for irrigation, and drainage is discharged to the external water system through 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 area <![CDATA[km 2 ]]> 8.29 6.10％ Green space <![CDATA[km 2 ]]> 1.17 0.90％ Other land <![CDATA[km 2 ]]> 17.17 12.60％ total <![CDATA[km 2 ]]> 135.42 100％

[0106] The rainfall data of 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. The daily rainfall runoff Q of the design representative year (i.e. 2011) in the embankment was calculated by referring to the runoff data of the hydrological station and combining the basic data such as the annual rainfall data, underlying surface composition, and catchment area of ​​the design representative year. 3i ,like Figure 2 Shown (Unit: m 3 ).

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

[0108] Through statistical data analysis, the total area of ​​the large embankment waters in the region 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 external drainage volume Q of the dike is calculated 1i ,like Figure 5 Shown (Unit: m 3 ).

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

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

[0112] According to the relationship between daily rainfall runoff and daily crop water consumption, the daily external drainage volume and external drainage conditions of the existing embankment are judged, 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 condition, considering the reuse of external drainage, according to the water balance calculation formula (10), the daily external drainage volume Q' after considering regulation is calculated. 1i ,like Figure 8 shown.

[0114] Table 2 Water resource balance analysis table for a representative year of Dawei 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 balance condition of the reuse working conditions) and the balanced conditions of the irrigation reuse working conditions, the annual cumulative values ​​of the external irrigation water volume and the external drainage volume are shown in Table 2. After considering the irrigation reuse working conditions, 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 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, which includes: a memory, a processor, and a computer program / instructions stored in the memory, and 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, which can perform various appropriate operations and processes according to the program and / or data stored in the read-only memory (ROM) or the program and / or data loaded from the storage portion into the random access memory (RAM). The processor can be a multi-core processor, or it can include multiple processors. In some embodiments, the processor can include a general 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. In RAM, various programs and data required for device operation are also stored. The processor, ROM and RAM are connected to each other via a bus. The 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 on which a computer program / instruction is stored. 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 implemented by any method or technology to store information. 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 disk read-only memory (CD-ROM), digital versatile disk (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] 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. 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 disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, 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 temporary computer-readable media (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] What is disclosed above is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or modifications within the technical scope disclosed in the present invention, which should be covered within the protection scope of the present invention.

Claims

1. A water balance calculation method suitable for 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 according to the daily crop water consumption of the representative year of the embankment design; Calculate the daily evaporation of the embankment water area based on the embankment water area and the daily evaporation of the design representative year; Calculate the current daily external drainage volume of the embankment according to the daily rainfall runoff volume of the representative year of the embankment design, the daily crop water consumption of the representative year of the embankment design, and the daily evaporation of the embankment water area; Obtain the regulation depth and regulation area of ​​each regulation space in 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 residual water volume of the regulating storage space and the daily water inflow change of the regulating storage space according to the daily rainfall runoff volume of the representative year of the embankment design, the daily crop water consumption volume of the representative year of the embankment design, the daily evaporation volume of the embankment water area, the daily external drainage volume of the current embankment, and the total capacity of the regulating storage space in the embankment; Calculate the daily irrigation reuse water consumption of the storage space according to the daily crop water consumption of the representative year of the embankment design and the daily residual water in the storage space; Calculate the daily irrigation water volume after storage and diversion based on the daily crop water consumption in the representative year of the embankment design and the daily irrigation water volume of the storage space; The daily external drainage after storage and regulation is calculated 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 year of the dike design, the daily crop water consumption in the representative year of the dike design, the daily external irrigation water volume when the current storage space is not utilized, the daily evaporation of the dike water area, 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 year of the design 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 current dike is: Q 1i =Q 3i -Q 4i -Q 2i ; Among them, Q 1i represents the current external discharge of the dike on the i-th day, Q 3i represents the rainfall runoff on the ith day of the representative year of the embankment design, Q 4i represents the evaporation of the embankment water area on the i-th day, Q 2i It represents the crop water consumption on the i-th day in 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 capacity of the storage space in the dike is: Where C represents the total storage capacity of the dike, unit: m 3 ;h i Indicates the storage depth of the i-th storage space, unit: m; A wi Represents 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 regulating and storing space and the daily water inflow change of the regulating and storing space are calculated according to the daily rainfall runoff volume of the representative year of the embankment design, the daily crop water consumption volume of the representative year of the embankment design, the daily evaporation volume of the embankment, the daily external drainage volume of the current embankment, and the total capacity of the regulating and storing space in the embankment, specifically including: Determine whether the current daily external drainage volume of the dike is greater than or equal to 0. If so, the calculation formula for the daily water inflow change in 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 the i-th day, Q 3i represents the rainfall runoff on the ith day of the representative year of the embankment design, Q 2i represents the crop water consumption on the ith day of the representative year of the embankment design, Q 4i represents the evaporation of the water area of ​​the embankment on the i-th day, C represents the total storage capacity of the embankment, CR i represents the remaining water volume of the regulating and storing space on the i-th day; wherein, the calculation formula for the remaining water volume of the regulating and storing 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 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; Δ i-1 Indicates the change in water inflow to the storage space on the i-1th day.

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

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 regulation and storage is: Among them, Q' 5i represents the amount of irrigation water diverted from outside on the i-th day after regulation, η represents the water utilization coefficient, Q 6i represents the irrigation reuse water volume of the storage space on the i-th day, Q 2i It represents the crop water consumption on the i-th day in 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 regulation 1i , the specific calculation formula is: Q' 1i =Q 3i -Q 4i -Q 2i -Q 6i ; Among them, Q' 1i represents the external discharge volume on the ith day after storage and regulation, Q 3i represents the rainfall runoff on the ith day of the representative year of the embankment design, Q 4i represents the evaporation of the embankment water area on the i-th day, Q 2i represents the crop water consumption on the ith day of the representative year of the embankment design, Q 6i represents the irrigation reuse water volume of the storage space on the i-th day; 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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