Method, device and electronic equipment for determining the depth of drainage ditch in drought irrigation area

Abstract

The present invention discloses a method, device and electronic equipment for determining the depth of drainage ditches in arid irrigation areas. The method includes: obtaining an initial depth value of a target drainage ditch based on a preset depth range of the drainage ditch in a target irrigation area; calculating the distance between the target drainage ditch and a preset reference point based on the initial depth value of the target drainage ditch; determining a second depth value of the target drainage ditch according to the distance between the target drainage ditch and the preset reference point; judging whether the second depth value meets the preset requirements corresponding to the target drainage ditch; if the second depth value meets the preset requirements, determining the depth of the target drainage ditch based on the second depth value. The present invention provides a theoretical basis and calculation method for determining the depth of drainage ditches in arid irrigation areas, can quickly and accurately calculate the depth of drainage ditches, and make up for the shortcomings of determining the depth of drainage ditch based on experience. It is of great significance to the high-quality development of irrigation areas and groundwater resource management.

Description

Technical Field

[0001] The present invention relates to the technical field of arid area ecohydrology, and in particular to a method, a device and an electronic device for determining the depth of a drainage ditch in an arid irrigation area. Background Art

[0002] The groundwater level in arid irrigation areas is closely related to salinization and terrestrial vegetation ecology, and is related to the ecological health and agricultural production of the irrigation areas. Drainage ditches are key engineering measures to control the groundwater level in arid irrigation areas. Determining a reasonable drainage ditch depth is the key to high-quality development of irrigation areas. At present, the determination of the depth of drainage ditches in irrigation areas is mainly based on experience. However, the experience requirements are high, and unreasonable settings are prone to occur. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the disadvantage that unreasonable settings are easily caused by empirical determination, thereby providing a method, device and electronic equipment for determining the depth of drainage ditches in arid irrigation areas.

[0004] According to a first aspect, an embodiment of the present invention discloses a method for determining the depth of drainage ditches in arid irrigation areas, the method comprising: obtaining an initial depth value of a target drainage ditch based on a preset depth range of the drainage ditch in the target irrigation area, the target drainage ditch including a farm ditch, a ditch and a branch ditch; calculating the distance between the target drainage ditch and a preset reference point based on the initial depth value of the target drainage ditch; determining a second depth value of the target drainage ditch based on the distance between the target drainage ditch and the preset reference point; judging whether the second depth value meets the preset requirements corresponding to the target drainage ditch; if the second depth value meets the preset requirements, determining the depth of the target drainage ditch based on the second depth value; if the second depth value does not meet the preset requirements, repeating the steps of obtaining the initial depth value of the target drainage ditch based on the preset depth range of the drainage ditch in the target irrigation area to determining the second depth value of the target drainage ditch, until the second depth value meets the preset requirements.

[0005] Optionally, the preset depth range of the drainage ditch is obtained by the following steps: determining the minimum depth of the drainage ditch based on the change process of groundwater evaporation in the target irrigation area with the groundwater level; determining the maximum depth of the drainage ditch based on the contribution rate of groundwater to vegetation transpiration in the target irrigation area; determining the depth range of the drainage ditch based on the minimum depth and the maximum depth of the drainage ditch.

[0006] Optionally, determining the depth of the target drainage ditch based on the second depth value includes: adding a safety depth value to the second depth value to obtain a target depth value; and using the target depth value as the depth of the target drainage ditch.

[0007] Optionally, the target drainage ditch further includes: a hair ditch and a dry ditch, and the method further includes: determining the minimum depth of the drainage ditch as the depth of the hair ditch; and determining the maximum depth of the drainage ditch as the depth of the dry ditch.

[0008] Optionally, the second depth value of the target drainage ditch is determined based on the spacing of the target drainage ditches through the following steps: determining a groundwater flow curve under natural conditions based on the precipitation, temperature and soil texture of the target irrigation area; and determining the second depth value of the target drainage ditch based on the groundwater flow curve under natural conditions and the spacing of the target drainage ditches.

[0009] Optionally, the method of determining the minimum depth of the drainage ditch based on the process of change of the phreatic water evaporation with the groundwater level includes: determining the mutation point of the relationship curve between the phreatic water evaporation and the groundwater level based on the relationship curve of the target irrigation area; and taking the groundwater level depth corresponding to the mutation point of the relationship curve as the minimum depth of the drainage ditch.

[0010] Optionally, determining the maximum depth of the drainage ditch based on the contribution rate of groundwater to vegetation transpiration includes: determining the groundwater level depth corresponding to zero vegetation transpiration contribution rate based on a relationship curve between vegetation transpiration contribution rate and groundwater level depth in the target irrigation area; and taking the groundwater level depth corresponding to zero vegetation transpiration contribution rate as the maximum depth of the drainage ditch.

[0011] According to a second aspect, an embodiment of the present invention further discloses a device for determining the depth of a drainage ditch in an arid irrigation area, the device comprising: an initial depth acquisition module for acquiring an initial depth value of a target drainage ditch based on a preset depth range of the drainage ditch in the target irrigation area, the target drainage ditch comprising a farm ditch, a ditches, and a branch ditch; a spacing calculation module for calculating the spacing between the target drainage ditch and a preset reference point based on the initial depth value of the target drainage ditch; a second depth value determination module for determining a second depth value of the target drainage ditch based on the spacing between the target drainage ditch and the preset reference point; a requirement judgment module for judging whether the second depth value meets the preset requirements corresponding to the target drainage ditch; a depth determination module for determining the depth of the target drainage ditch based on the second depth value if the second depth value meets the preset requirements, and if the second depth value does not meet the preset requirements, repeating the steps of acquiring the initial depth value of the target drainage ditch based on the preset depth range of the drainage ditch in the target irrigation area to determining the second depth value of the target drainage ditch until the second depth value meets the preset requirements.

[0012] According to the third aspect, an embodiment of the present invention further discloses an electronic device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the steps of the method for determining the depth of drainage ditches in arid irrigation areas as described in the first aspect or any optional embodiment of the first aspect.

[0013] According to the fourth aspect, an embodiment of the present invention further discloses a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method for determining the depth of drainage ditches in arid irrigation areas as described in the first aspect or any optional embodiment of the first aspect.

[0014] The technical solution of the present invention has the following advantages:

[0015] The method for determining the depth of drainage ditches in arid irrigation areas provided by the present invention obtains an initial depth value of a target drainage ditch based on a preset depth range of drainage ditches in a target irrigation area, calculates the distance between the target drainage ditch and a preset reference point based on the initial depth value of the target drainage ditch, determines a second depth value of the target drainage ditch based on the distance between the target drainage ditch and the preset reference point, judges whether the second depth value meets the preset requirements corresponding to the target drainage ditch, and if the second depth value meets the preset requirements, determines the depth of the target drainage ditch based on the second depth value; if the second depth value does not meet the preset requirements, returns to re-obtain the initial depth value of the drainage ditch, and repeats the steps of obtaining the initial depth value of the target drainage ditch based on the preset depth range of the drainage ditch in the target irrigation area to determining the second depth value of the target drainage ditch until the second depth value meets the preset requirements. The present invention provides a theoretical basis and a calculation method for determining the depth of drainage ditches in arid irrigation areas, can quickly and accurately calculate the depth of drainage ditches, and make up for the shortcomings of determining the depth of drainage ditch based on experience, which is of great significance to the high-quality development of irrigation areas and groundwater resource management. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a flowchart of a specific example of a method for determining the depth of a drainage ditch in an arid irrigation area according to an embodiment of the present invention;

[0018] Figure 2 An example diagram of groundwater ecological distribution in a method for determining the depth of drainage ditches in arid irrigation areas according to an embodiment of the present invention;

[0019] Figure 3 This is an example diagram of the distribution of drainage ditches in a target irrigation area of ​​the method for determining the depth of drainage ditches in arid irrigation areas according to an embodiment of the present invention;

[0020] Figure 4 This is a principle block diagram of a specific example of a device for determining the depth of a drainage ditch in an arid irrigation area according to an embodiment of the present invention;

[0021] Figure 5 FIG. 4 is a diagram showing a specific example of an electronic device in an embodiment of the present invention. DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0025] The embodiment of the present invention discloses a method for determining the depth of drainage ditches in drought irrigation areas. Figure 1 As shown, the method includes the following steps:

[0026] Step 101: obtaining an initial depth value of a target drainage ditch based on a preset depth range of the drainage ditch in the target irrigation area.

[0027] Among them, the target drainage ditches include agricultural ditches, ditch ditches and branch ditches.

[0028] For example, in the embodiment of the present application, the target irrigation area may be an arid irrigation area, and the preset depth range of the drainage ditch may be based on the recognition of the existing characteristics of the target irrigation area and obtained in advance through human experience. Alternatively, various ecological factors of the target irrigation area, such as precipitation, may be considered, and the preset depth range of the drainage ditch in the area may be obtained through training using a machine learning method, for example only. The drainage ditches in the target irrigation area may be set up as farm ditches, bucket ditches, branch ditches, rough ditches, and dry ditches, among which the rough ditches have the smallest depth, followed by farm ditches, bucket ditches, branch ditches, and the dry ditches have the largest depth. After obtaining the preset depth range of the drainage ditch, the initial depth values ​​may be assigned in descending order according to the depth of each level of drainage ditch. For example, if the preset depth range is 1.5m-3.5m, the initial depth values ​​of 1.5m for rough ditches, 2m for farm ditches, 2.5m for bucket ditches, 3m for branch ditches, and 3.5m for dry ditches may be assigned in order, for example only.

[0029] Step 102: Calculate the distance between the target drainage ditch and a preset reference point based on the initial depth value of the target drainage ditch.

[0030] For example, there is no limitation on the setting of the preset reference point, and it can be determined according to actual conditions. In the embodiment of the present application, since the furrow is the drainage ditch with the smallest depth in the target irrigation area, that is, the "highest water level", the furrow can be used as the reference point. Based on the initial depth value of the target drainage ditch obtained above, the distance between the target drainage ditch at each level and the preset reference point can be calculated. The distance L between the target drainage ditch at each level and the furrow is calculated by the following formula:

[0031]

[0032] Wherein, L is the distance between the target drainage ditch and the ditch; k is the soil permeability coefficient of the target irrigation area in m / d; H is the working water head, that is, the difference between the water level on the field surface and the water level in the ditch, in m; q is the design leakage rate during flooding of farmland, in m / d; Φ0 is the leakage resistance coefficient, H is the initial depth of the target drainage ditch; M is the distance from the field surface to the impermeable layer; when M>5H, the aquifer can be considered to be infinitely deep, and Φ0 can be considered to be 0.5.

[0033] Step 103: Determine a second depth value of the target drainage ditch according to the distance between the target drainage ditch and a preset reference point.

[0034] For example, in the embodiment of the present application, the determination of the depth of the drainage ditch is closely related to the determination of the spacing of the drainage ditch. If the drainage ditches are sparsely arranged, the depth of each drainage ditch needs to be relatively deeper for drainage. If the spacing of the drainage ditches is small, the depth of the drainage ditch can be appropriately reduced.

[0035] As an optional embodiment of the present invention, the second depth value of the target drainage ditch is determined based on the spacing of the target drainage ditches by the following formula: a groundwater flow curve under natural conditions is determined based on the precipitation, temperature and soil texture of the target irrigation area; and the second depth value of the target drainage ditch is determined based on the groundwater flow curve under natural conditions and the spacing of the target drainage ditches.

[0036] For example, the embodiment of the present application can monitor the attribute data of precipitation, temperature and soil texture in the target irrigation area in real time, obtain the groundwater flow field distribution under the natural state, and then obtain the following through linear fitting: Figure 2 The groundwater level shown can also be a groundwater flow curve. Machine learning can also be used to train and predict the groundwater flow curve for the target irrigation area using these attribute data: y = f(x, p, T, s), where y is the groundwater depth in meters, f is the function of the groundwater depth and the distance from the river, x is the distance from the river in meters, p is the regional precipitation in millimeters, T is the regional temperature in degrees Celsius, and s is the regional soil texture.

[0037] As a specific embodiment of the present invention, the groundwater flow curve is applied to the layout of drainage ditches, and the ditches can be used as "natural rivers", such as Figure 3 As shown, it can be directly arranged near a natural river. Based on the distance between each level of drainage ditches and the rough ditch, the target drainage ditches of each level are arranged in sequence according to the groundwater flow curve, so that the groundwater flow can flow into the drainage ditches of each level according to the flow curve. The five-level drainage ditches can be arranged according to the groundwater flow curve, or the required drainage ditches can be arranged according to the underground flow curve according to the actual situation, and then the corresponding second depth value can be obtained. The formula for calculating the second depth value of the target drainage ditch is:

[0038] H t =f(L,p,T,s)

[0039] Wherein, Ht represents the second depth value of the target drainage ditch; L represents the distance between each level of target drainage ditch and the rough ditch.

[0040] Step 104: Determine whether the second depth value meets the preset requirement corresponding to the target drainage ditch.

[0041] Exemplarily, the preset requirements corresponding to the target drainage ditch of the embodiment of the present application may be that the second depth value of the target drainage ditch must be within the preset depth range of the drainage ditch, or the depth value of a certain level of drainage ditch needs to be within the preset depth range of the drainage ditch, and also needs to be within the depth range corresponding to the drainage ditch of that level. For example, the depth value of the branch ditch needs to be within the preset depth range of 1.5m-3.5m, and the branch ditch is a drainage ditch with a larger second depth value than the main ditch, and its depth value needs to be between 2.5m and 0.3m. For example only, after obtaining the second depth values ​​of the target drainage ditches at all levels, it is determined whether the obtained second depth value meets the corresponding preset requirements.

[0042] Step 105: If the second depth value meets the preset requirements, determine the depth of the target drainage ditch based on the second depth value; if the second depth value does not meet the preset requirements, repeat the steps of obtaining the initial depth value of the target drainage ditch based on the preset depth range of the drainage ditch in the target irrigation area to determine the second depth value of the target drainage ditch until the second depth value meets the preset requirements.

[0043] For example, after determining that the second depth value meets the preset requirements, the embodiment of the present application can directly determine the obtained second depth value as the depth of the drainage ditch and perform corresponding arrangements, which is only an example.

[0044] The method for determining the depth of drainage ditches in arid irrigation areas provided by the present invention obtains an initial depth value of a target drainage ditch based on a preset depth range of drainage ditches in a target irrigation area, calculates the distance between the target drainage ditch and a preset reference point based on the initial depth value of the target drainage ditch, determines a second depth value of the target drainage ditch based on the distance between the target drainage ditch and the preset reference point, judges whether the second depth value meets the preset requirements corresponding to the target drainage ditch, and if the second depth value meets the preset requirements, determines the depth of the target drainage ditch based on the second depth value; if the second depth value does not meet the preset requirements, returns to re-obtain the initial depth value of the drainage ditch, and repeats the steps of obtaining the initial depth value of the target drainage ditch based on the preset depth range of the drainage ditch in the target irrigation area to determining the second depth value of the target drainage ditch until the second depth value meets the preset requirements. The present invention provides a theoretical basis and a calculation method for determining the depth of drainage ditches in arid irrigation areas, can quickly and accurately calculate the depth of drainage ditches, and make up for the shortcomings of determining the depth of drainage ditch based on experience, which is of great significance to the high-quality development of irrigation areas and groundwater resource management.

[0045] As an optional embodiment of the present invention, the preset depth range of the drainage ditch is obtained by the following steps: determining the minimum depth of the drainage ditch based on the change process of the groundwater evaporation in the target irrigation area with the groundwater level; determining the maximum depth of the drainage ditch based on the contribution rate of groundwater to vegetation transpiration in the target irrigation area; determining the depth range of the drainage ditch based on the minimum depth and the maximum depth of the drainage ditch.

[0046] For example, in the embodiments of this application, agricultural ditches and minor ditches are the drainage ditches with the largest number, highest density, and smallest depth in the target irrigation area, and are directly related to salinization in the irrigation area. When the groundwater depth decreases, groundwater will come into contact with the surface under capillary forces, bringing salt to the surface and forming an aggregate. At this time, groundwater evaporation will transition from the "water vapor diffusion stage" to the "stable evaporation stage", and the subsurface evaporation rate will increase significantly, which is directly related to salinization in the target irrigation area. Therefore, the groundwater depth corresponding to the significant increase in the subsurface evaporation rate can be used as the minimum drainage ditch depth in the target irrigation area. Main ditches and branch ditches are drainage ditches with greater depth in the target irrigation area, which directly affect the maximum groundwater depth in the target irrigation area. When the groundwater depth increases, the contribution of capillary rise water to vegetation transpiration decreases or even becomes zero, which in turn affects the vegetation ecology on land. Therefore, the groundwater depth corresponding to the zero contribution to tree transpiration is used as the maximum drainage ditch depth in the target irrigation area. This can both prevent salinization in the target irrigation area and ensure the health of the vegetation ecology. This is just an example.

[0047] As a specific embodiment of the present invention, the minimum depth of the drainage ditch is determined based on the process of change of the phreatic evaporation with the groundwater level, including: determining the mutation point of the relationship curve between the phreatic evaporation and the groundwater level based on the relationship curve of the target irrigation area; and using the groundwater level depth corresponding to the mutation point of the relationship curve as the minimum depth of the drainage ditch.

[0048] For example, the embodiment of the present application can obtain the following formula by simulating the vertical one-dimensional soil moisture movement process on bare land using experimental observation data of the target irrigation area and the Hydrus-1D model:

[0049]

[0050] Where t is time; θ is the volumetric water content (cm2) of the soil profile in the target irrigation area. 3 / cm 3 ); h is the negative pressure head of the soil profile in the target irrigation area (cm); z is the vertical spatial coordinate (cm); k(h) is the unsaturated hydraulic conductivity of the soil (cm / h); q0(0,t) is the upper boundary water flux (cm / h); h(B,t) is the lower boundary negative pressure value (cm).

[0051] The relationship curve between phreatic water evaporation and groundwater level is obtained according to the above formula, and the mutation point of the relationship curve between phreatic water evaporation and groundwater level depth can be obtained. The groundwater level depth corresponding to the mutation point is recorded as the minimum depth of the drainage ditch, which is only used as an example.

[0052] As a specific embodiment of the present invention, the maximum depth of the drainage ditch is determined based on the contribution rate of groundwater to vegetation transpiration, including: determining the groundwater level depth corresponding to when the vegetation transpiration contribution rate is zero based on a relationship curve between the vegetation transpiration contribution rate and the groundwater level depth in the target irrigation area; and using the groundwater level depth corresponding to when the vegetation transpiration contribution rate is zero as the maximum depth of the drainage ditch.

[0053] For example, the embodiment of the present application may propose a vegetation transpiration contribution rate (actual transpiration / potential transpiration) indicator, and obtain the following formula by using experimental observation data of the target irrigation area and the Hydrus-1D model to simulate the vertical one-dimensional soil water movement process under vegetation conditions:

[0054]

[0055] Where t is time; θ is the volumetric water content (cm2) of the soil profile in the target irrigation area. 3 / cm 3 ); h is the negative pressure head of the soil profile (cm); z is the vertical spatial coordinate (cm); k(h) is the unsaturated hydraulic conductivity of the soil (cm / h); q0(0,t) is the upper boundary water flux (cm / h); h(B,t) is the lower boundary negative pressure value (cm); S(z,t) is the root water absorption rate (cm / h).

[0056] Based on the above model, the changes in vegetation transpiration contribution rate under different groundwater table depths are simulated to obtain the groundwater table depth when the vegetation transpiration contribution rate is 0. The corresponding groundwater table depth is the maximum depth of the drainage ditch, which is only used as an example.

[0057] This embodiment simulates the water transport process of a forestland GSPAC system based on the Hydrus-1D model and experimental station observation data. Boundary and initial conditions can be flexibly adjusted to simulate water transport under different conditions. The Van Genuchten and Brooks-Corey equations can be used to calculate soil water movement parameters. The Feddes and S-Shape root models are used to simulate plant root water absorption. Evapotranspiration is calculated using the Penman-Montheith and Hargreaves equations recommended by FAO 56.

[0058] The upper boundary condition in the embodiment of the present application can be set to a given flux boundary, that is, the evaporation of the topsoil or the rainfall / irrigation amount is used as the upper boundary; the lower boundary condition can be set to the variable head as the lower boundary, and the head value is obtained by subtracting the measured groundwater depth from the bottom of the model. The pressure membrane instrument can be used to measure the soil moisture content corresponding to different pressures of each soil layer, and the soil moisture characteristic curve parameters of the van Genuchten model can be fitted using RETC software (θs uses the measured value), and finally the basic physical properties and various hydraulic parameters of the sample soil are obtained. Based on the experimental root digging results, a suitable root system model can be selected to simulate the water absorption process of plant roots, which is only used as an example.

[0059] As an optional embodiment of the present invention, determining the depth of the target drainage ditch based on the second depth value includes: adding a safety depth value to the second depth value to obtain a target depth value; and using the target depth value as the depth of the target drainage ditch.

[0060] For example, after obtaining the second depth value Ht, in order to ensure the drainage efficiency of the drainage ditch, the embodiment of the present application can increase the safety depth value h according to the actual situation, and calculate the depth H of the drainage ditch by H=Ht+h. For example, the branch ditch H, the bucket ditch H and the rough ditch H can be obtained, which is just an example.

[0061] As an optional embodiment of the present invention, the target drainage ditch further includes: a hair ditch and a dry ditch, and the method further includes: determining the maximum depth of the drainage ditch as the depth of the hair ditch; determining the maximum depth of the drainage ditch as the depth of the dry ditch.

[0062] For example, in the embodiment of the present application, the minimum depth of the drainage ditch can be selected as the depth value of the hair groove, and the maximum depth of the drainage ditch can be determined as the depth of the dry ditch to reduce the amount of calculation.

[0063] The embodiment of the present invention also discloses a device for determining the depth of a drainage ditch in an arid irrigation area. Figure 4 As shown, the device includes:

[0064] An initial depth acquisition module 201 is configured to acquire an initial depth value of a target drainage ditch based on a preset depth range of the drainage ditch in the target irrigation area, wherein the target drainage ditch includes a farm ditch, a ditch, and a branch ditch;

[0065] a distance calculation module 202 for calculating the distance between the target drainage ditch and a preset reference point based on the initial depth value of the target drainage ditch;

[0066] A second depth value determining module 203 is configured to determine a second depth value of the target drainage ditch according to a distance between the target drainage ditch and a preset reference point;

[0067] A requirement determination module 204 is configured to determine whether the second depth value meets a preset requirement corresponding to the target drainage ditch;

[0068] The depth determination module 205 is configured to determine the depth of the target drainage ditch based on the second depth value if the second depth value meets the preset requirements; and if the second depth value does not meet the preset requirements, repeat the steps of obtaining the initial depth value of the target drainage ditch based on the preset depth range of the drainage ditch in the target irrigation area to determining the second depth value of the target drainage ditch until the second depth value meets the preset requirements.

[0069] The device for determining the depth of drainage ditches in arid irrigation areas provided by the present invention obtains an initial depth value of a target drainage ditch based on a preset depth range of drainage ditches in a target irrigation area, calculates the distance between the target drainage ditch and a preset reference point based on the initial depth value of the target drainage ditch, determines a second depth value of the target drainage ditch according to the distance between the target drainage ditch and the preset reference point, and judges whether the second depth value meets the preset requirements corresponding to the target drainage ditch; if the second depth value meets the preset requirements, determines the depth of the target drainage ditch based on the second depth value. The present invention provides a theoretical basis and calculation method for determining the depth of a drainage ditch, can quickly and accurately calculate the depth of a drainage ditch, and makes up for the deficiency of determining the depth of a drainage ditch based on experience, which is of great significance to the high-quality development of irrigation areas and groundwater resource management.

[0070] As an optional embodiment of the present invention, the device also includes: a minimum depth determination module, which is used to determine the minimum depth of the drainage ditch based on the change process of the groundwater evaporation in the target irrigation area with the groundwater level; a maximum depth determination module, which is used to determine the maximum depth of the drainage ditch based on the contribution rate of groundwater to vegetation transpiration in the target irrigation area; and a depth range determination module, which is used to determine the depth range of the drainage ditch based on the minimum depth and the maximum depth of the drainage ditch.

[0071] As an optional embodiment of the present invention, the depth determination module includes: a depth increase submodule, used to increase the safety depth value based on the second depth value to obtain a target depth value; a depth determination submodule, used to use the target depth value as the depth of the target drainage ditch.

[0072] As an optional embodiment of the present invention, the target drainage ditch also includes: a hair ditch and a dry ditch, and the device also includes: a hair ditch depth determination module, used to determine the minimum depth of the drainage ditch as the depth of the hair ditch; and a dry ditch depth determination module, used to determine the maximum depth of the drainage ditch as the depth of the dry ditch.

[0073] As an optional embodiment of the present invention, the second depth value determination module includes: a curve determination submodule, which is used to determine the groundwater flow curve under natural conditions based on the precipitation, temperature and soil texture of the target irrigation area; and a second depth value determination submodule, which is used to determine the second depth value of the target drainage ditch based on the groundwater flow curve under natural conditions and the spacing of the target drainage ditch.

[0074] As an optional embodiment of the present invention, the minimum depth determination module includes: a mutation point determination submodule, which is used to determine the mutation point of the relationship curve between the phreatic evaporation amount and the groundwater level based on the relationship curve between the phreatic evaporation amount and the groundwater level in the target irrigation area; and a maximum depth determination submodule, which is used to use the groundwater level depth corresponding to the mutation point of the relationship curve as the minimum depth of the drainage ditch.

[0075] As an optional embodiment of the present invention, the minimum depth determination module includes: a water level depth determination submodule, which is used to determine the groundwater level depth corresponding to when the vegetation transpiration contribution rate is zero based on the relationship curve between the vegetation transpiration contribution rate and the groundwater level depth in the target irrigation area; and a maximum depth determination submodule, which is used to use the groundwater level depth corresponding to the vegetation transpiration contribution rate of zero as the maximum depth of the drainage ditch.

[0076] The embodiment of the present invention further provides an electronic device, such as Figure 5 As shown, the electronic device may include a processor 401 and a memory 402, wherein the processor 401 and the memory 402 may be connected via a bus or other means. Figure 3 The bus connection is taken as an example.

[0077] The processor 401 may be a central processing unit (CPU). The processor 401 may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or a combination of the above chips.

[0078] Memory 402, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs, non-transitory computer-executable programs, and modules, such as the program instructions / modules corresponding to the method for determining the depth of drainage ditches in arid irrigation areas in the embodiments of the present invention. Processor 401 executes the non-transitory software programs, instructions, and modules stored in memory 402 to perform various processor functions and data processing, thereby implementing the method for determining the depth of drainage ditches in arid irrigation areas in the aforementioned method embodiments.

[0079] The memory 402 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and applications required for at least one function; the data storage area may store data created by the processor 401, etc. In addition, the memory 402 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some embodiments, the memory 402 may optionally include a memory remotely located relative to the processor 401, and these remote memories may be connected to the processor 401 via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0080] The one or more modules are stored in the memory 402 and when executed by the processor 401, perform the following steps: Figure 1 The method for determining the depth of drainage ditches in drought irrigation areas in the illustrated embodiment.

[0081] For details of the above electronic equipment, please refer to Figure 1 The corresponding descriptions and effects in the embodiments shown can be understood and will not be repeated here.

[0082] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. The storage medium can be a magnetic disk, an optical disk, a read-only memory (ROM), a random access memory (RAM), a flash memory, a hard disk drive (HDD), or a solid-state drive (SSD). The storage medium can also include a combination of the above-mentioned types of memory.

[0083] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the defined scope.

Claims

1. A method for determining the depth of drainage ditches in drought irrigation areas, characterized in that: The method comprises: Based on a preset depth range of drainage ditches in a target irrigation area, obtaining initial depth values ​​of target drainage ditches, wherein the target drainage ditches include agricultural ditches, ditch ditches, and branch ditches. Obtaining the initial depth values ​​of the target drainage ditches includes assigning initial depth values ​​to the drainage ditches of each level in descending order of depth. Calculating the distance between the target drainage ditch and a preset reference point based on the initial depth value of the target drainage ditch; Determining a second depth value of the target drainage ditch based on a distance between the target drainage ditch and a preset reference point, wherein the second depth value of the target drainage ditch is determined based on the distance between the target drainage ditch and the preset reference point by the following steps: determining a groundwater flow curve under natural conditions based on precipitation, temperature, and soil texture in a target irrigation area; determining the second depth value of the target drainage ditch based on the groundwater flow curve under natural conditions and the distance between the target drainage ditch and the preset reference point; Determining whether the second depth value meets the preset requirement corresponding to the target drainage ditch; If the second depth value meets the preset requirements, the depth of the target drainage ditch is determined based on the second depth value; if the second depth value does not meet the preset requirements, the steps of obtaining the initial depth value of the target drainage ditch based on the preset depth range of the drainage ditch in the target irrigation area to determining the second depth value of the target drainage ditch are repeated until the second depth value meets the preset requirements.

2. The method for determining the depth of drainage ditches in drought irrigation areas according to claim 1, characterized in that: The preset depth range of the drainage ditch is obtained by the following steps: Determine the minimum depth of the drainage ditch based on the change of groundwater level with the phreatic evaporation in the target irrigation area; Determine the maximum depth of the drainage ditch based on the contribution rate of groundwater to vegetation transpiration in the target irrigation area; A depth range of the drainage ditch is determined based on the minimum depth value and the maximum depth value of the drainage ditch.

3. The method for determining the depth of drainage ditches in drought irrigation areas according to claim 1, characterized in that: The determining the depth of the target drainage ditch based on the second depth value includes: Adding the safety depth value to the second depth value to obtain a target depth value; The target depth value is used as the depth of the target drainage ditch.

4. The method for determining the depth of drainage ditches in drought irrigation areas according to claim 2, characterized in that: The target drainage ditch further comprises: a rough ditch and a dry ditch, and the method further comprises: Determine the minimum depth of the drainage ditch as the depth of the furrow; The maximum depth of the drainage ditch is determined as the depth of the dry ditch.

5. The method for determining the depth of drainage ditches in drought irrigation areas according to claim 2, characterized in that: The method of determining the minimum depth of the drainage ditch based on the phreatic evaporation comprises: Based on a curve of the relationship between the phreatic water evaporation and the groundwater level in the target irrigation area, determining a mutation point of the curve of the relationship between the phreatic water evaporation and the groundwater level depth; The groundwater level depth corresponding to the mutation point of the relationship curve is used as the minimum depth of the drainage ditch.

6. The method for determining the depth of drainage ditches in drought irrigation areas according to claim 2, characterized in that: The method of determining the maximum depth of the drainage ditch based on the contribution rate of groundwater to vegetation transpiration includes: Based on the relationship curve between vegetation transpiration contribution rate and groundwater depth in the target irrigation area, determine the groundwater depth corresponding to when vegetation transpiration contribution rate is zero; The groundwater level depth corresponding to the vegetation transpiration contribution rate being zero is taken as the maximum depth of the drainage ditch.

7. A device for determining the depth of drainage ditches in drought irrigation areas, characterized in that: The device comprises: An initial depth acquisition module is configured to acquire initial depth values ​​of target drainage ditches based on a preset depth range of drainage ditches in a target irrigation area, wherein the target drainage ditches include farm ditches, ditch ditches, and branch ditches. The module assigns initial depth values ​​to the drainage ditches of each level in descending order of depth. a distance calculation module, configured to calculate the distance between the target drainage ditch and a preset reference point based on the initial depth value of the target drainage ditch; a second depth value determining module, configured to determine a second depth value of the target drainage ditch based on a distance between the target drainage ditch and a preset reference point, wherein the second depth value of the target drainage ditch is determined based on the distance between the target drainage ditch and the preset reference point by: determining a groundwater flow curve under natural conditions based on precipitation, temperature, and soil texture in a target irrigation area; and determining the second depth value of the target drainage ditch based on the groundwater flow curve under natural conditions and the distance between the target drainage ditch and the preset reference point; a requirement determination module, configured to determine whether the second depth value meets a preset requirement corresponding to the target drainage ditch; a depth determination module, configured to determine the depth of the target drainage ditch based on the second depth value if the second depth value meets the preset requirements; and, if the second depth value does not meet the preset requirements, repeat the steps of obtaining the initial depth value of the target drainage ditch based on the preset depth range of the drainage ditch in the target irrigation area to determining the second depth value of the target drainage ditch until the second depth value meets the preset requirements.

8. An electronic device, characterized in that: include: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the steps of the method for determining the depth of drainage ditches in arid irrigation areas as described in any one of claims 1-6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for determining the depth of drainage ditches in arid irrigation areas according to any one of claims 1 to 6 are implemented.

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