Method and equipment for determining lateral runoff volume of underground water in irregular area

Abstract

The invention relates to the technical field of groundwater exploration, in particular to a method and equipment for determining groundwater lateral runoff in an irregular region, and the method comprises the following steps: firstly, acquiring data in a target region, and determining the gradient and the direction of the groundwater level in the target region according to the data in the target region; then, according to the gradient and the slope direction of the underground water level, the irregular boundary of the target area is segmented, finally, the lateral runoff volume of each segmented area is calculated, and the lateral runoff volume of each segmented area is added to determine the underground water lateral runoff volume of the target area. Different from an existing grid superposition mode for calculating the underground water lateral runoff based on the GIS, the method is simpler, more convenient and faster; and the problem of solving the lateral runoff of the underground water in an irregular research area is solved, and the limitation that the research area range is irregular in most underground water resource evaluation work is broken, so that the underground water resource evaluation work is better served.

Description

Technical Field

[0001] The invention relates to the technical field of groundwater survey, and in particular to a method and device for determining lateral runoff of groundwater in an irregular area. Background Art

[0002] In the evaluation of groundwater resources, lateral runoff is an important water balance item and an important component of regional groundwater. It has a great influence on the direction and speed of groundwater movement in the groundwater flow field. It will change the depth of groundwater level, which is of great significance for engineering construction. It also determines the amount of groundwater that can be exploited, which is closely related to human life. At present, Darcy's law is generally used to calculate the lateral runoff of regional groundwater, that is: This method is mostly used when the water head difference of each single width on both sides of the section is equal; there is also a method for calculating the lateral runoff of groundwater in the region based on the spatial overlay method of ArcGIS, but it is only applicable to the calculation of lateral runoff on regular boundary sections. However, the research scope of most groundwater resource evaluation is irregular. For the research on groundwater resource evaluation with irregular boundaries, there is an urgent need for a new method to calculate the lateral runoff of groundwater in the case of irregular research scope, so as to provide accurate lateral runoff recharge for groundwater resource research. Summary of the invention

[0003] In view of this, an object of the present invention is to provide a method and device for determining lateral runoff of groundwater in an irregular area, so as to overcome the problems existing in the current prior art.

[0004] To achieve the above objectives, the present invention adopts the following technical solutions: On the one hand, the present application provides a method for determining lateral groundwater runoff in an irregular area, comprising: Get data in the target area; Determine the slope and slope direction of the groundwater level in the target area based on the data in the target area; Segmenting the irregular boundary of the target area according to the slope and aspect of the groundwater level; The lateral runoff of each segmented area is calculated, and the lateral runoff of each segmented area is added together to determine the lateral runoff of groundwater in the target area.

[0005] Furthermore, in the above method, the data in the target area include: groundwater level grid data, aquifer bottom elevation and permeability coefficient grid data in the target area.

[0006] Furthermore, in the above method, segmenting the irregular boundary of the target area according to the slope and slope direction of the groundwater level includes: According to the slope direction of the groundwater level, the parts of the irregular boundary of the target area located in the same slope direction are segmented in sequence.

[0007] Furthermore, the method described above, wherein the lateral runoff of each segmented area is calculated, and the lateral runoff of each segmented area is added to determine the lateral runoff of groundwater in the target area, comprises: Calculating the average slope aspect, slope and average permeability coefficient grid data of each segmented area; wherein the average slope aspect of the segmented area is the hydraulic gradient, and the slope is the groundwater flow direction; Connecting the segmented areas end to end to form a line segment, and determining the length of the line segment and the direction in which the line segment flows into the segmented areas; Using a grid calculator to subtract the elevation of the aquifer floor from the groundwater level of the target area to obtain the water-passing section height of the target area, and using a zoning statistics tool to calculate the average height of each segmented area; Determine the lateral runoff of the segmented area by a calculation formula according to the hydraulic gradient of the segmented area, the groundwater flow direction, the average permeability grid data, the average height, the length of the line segment and the direction in which the line segment flows into each segmented area; The lateral runoff of each segmented area is added together to determine the lateral runoff of groundwater in the target area.

[0008] On the other hand, the present application provides a device for determining lateral runoff of groundwater in an irregular area, including a processor and a memory, wherein the processor is connected to the memory: Wherein, the processor is used to call and execute the program stored in the memory; The memory is used to store the program, and the program is at least used to execute any of the above methods for determining the lateral runoff of groundwater in an irregular area.

[0009] The beneficial effects of the present invention are: This application first obtains data in the target area, determines the slope and direction of the groundwater level in the target area based on the data in the target area, then segments the irregular boundary of the target area based on the slope and direction of the groundwater level, and finally calculates the lateral runoff of each segmented area, and adds the lateral runoff of each segmented area to determine the groundwater lateral runoff of the target area. This application is different from the existing GIS-based raster overlay method for calculating groundwater lateral runoff. This application is simpler and faster; and it solves the problem of calculating groundwater lateral runoff in an irregular study area, breaking the limitations of the irregular scope of the study area in most groundwater resource evaluation work, thereby better serving the work of groundwater resource evaluation. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0011] Figure 1 It is a flow chart provided by an embodiment of a method for determining lateral runoff of groundwater in an irregular area of ​​the present invention; Figure 2 It is a structural schematic diagram provided by an embodiment of a device for determining lateral groundwater runoff in an irregular area of ​​the present invention. DETAILED DESCRIPTION

[0012] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0013] Figure 1 This is a flow chart provided by an embodiment of a method for determining lateral runoff of groundwater in an irregular area of ​​the present invention. Figure 1 , this embodiment may include the following steps: S1. Acquire data in the target area; S2. Determine the slope and slope direction of the groundwater level in the target area based on the data in the target area; S3, segmenting the irregular boundary of the target area according to the slope and aspect of the groundwater level; S4. Calculate the lateral runoff of each segmented area, and add the lateral runoff of each segmented area to determine the lateral runoff of groundwater in the target area.

[0014] It is understandable that the current calculation of groundwater lateral runoff is mostly based on two situations. The first is that the single-width flow rate is the same at each location (the head difference on the left and right sides of the section is the same everywhere). The simple Darcy formula is used to calculate the single-width flow rate at one location and then multiply it by the length; the second is that for the regular boundary range, ArcGIS spatial overlay, raster calculation and other methods are used to calculate the lateral runoff at each regular boundary. However, in reality, since the scope of the study area in most groundwater resource evaluation work is irregular (such as a river basin, etc.), for the boundary parallel to the groundwater flow direction, the actual groundwater flow into the area is zero, and the above method is not simple. This application first obtains data in the target area, determines the slope and slope direction of the groundwater level in the target area based on the data in the target area, and then divides the irregular boundary of the target area into segments according to the slope and slope direction of the groundwater level. Finally, the lateral runoff of each segmented area is calculated, and the lateral runoff of each segmented area is added to determine the groundwater lateral runoff of the target area. This application is different from the existing GIS-based raster overlay method for calculating groundwater lateral runoff. This application is simpler and faster; it solves the problem of calculating groundwater lateral runoff in an irregular study area, breaking the limitations of the irregular scope of the study area in most groundwater resource evaluation work, thereby better serving the work of groundwater resource evaluation.

[0015] Preferably, the data in the target area include: groundwater level grid data, aquifer bottom elevation and permeability coefficient grid data in the target area.

[0016] It can be understood that the groundwater level grid data of the target area can be obtained by water level interpolation.

[0017] Preferably, step S3 includes: According to the slope direction of the groundwater level, the parts of the irregular boundary of the target area with the same slope direction are segmented in sequence.

[0018] Preferably, step S4 comprises: Calculate the average aspect, slope and average permeability raster data of each segmented area; the average aspect of the segmented area is the hydraulic gradient, and the slope is the groundwater flow direction; Connect each segmented area from beginning to end into a line segment, and determine the length of the line segment and the direction in which the line segment flows into each segmented area; Use the grid calculator to subtract the groundwater level of the target area from the aquifer floor elevation to get the water-passing section height of the target area, and use the zoning statistics tool to calculate the average height of each segmented area; The lateral runoff of the segmented area is determined by a calculation formula based on the hydraulic gradient of the segmented area, the groundwater flow direction, the average permeability grid data, the average height, the length of the line segment and the direction in which the line segment flows into each segmented area; The lateral runoff of each segmented area was added together to determine the lateral groundwater runoff of the target area.

[0019] It can be understood that the parts of the irregular boundary with the same slope direction (the same band) are segmented in sequence according to the slope direction, and these segments are regarded as regions, and the average slope direction, slope and permeability coefficient raster data of these segments are statistically analyzed; at this time, the slope is the hydraulic gradient of this segment. ; Slope direction is the direction of groundwater flow The average permeability coefficient in the region is . Then connect the beginning and end of each segment into a line segment with a length of , direction of the inflow area (normal of the line segment) Use the grid calculator to subtract the groundwater level from the aquifer floor elevation to get the water section height; and use the zoning statistics tool to calculate the average height of the segment. . After calculating the lateral runoff of each section according to Darcy's formula, add them together to get the total lateral runoff. The calculation formula is:

[0020] The present invention also provides a device for determining the lateral runoff of groundwater in an irregular area, which is used to implement the above method embodiment. Figure 2 1 is a schematic diagram of a structure provided by an embodiment of a device for determining lateral runoff of groundwater in an irregular area of ​​the present invention. Figure 2 As shown, the device for determining the lateral runoff of groundwater in an irregular area of ​​this embodiment includes a processor 21 and a memory 22, and the processor 21 is connected to the memory 22. The processor 21 is used to call and execute the program stored in the memory 22; the memory 22 is used to store the program, and the program is at least used to execute the method for determining the lateral runoff of groundwater in an irregular area in the above embodiment.

[0021] The specific implementation scheme of the device for determining the lateral runoff of groundwater in an irregular area provided in the embodiment of the present application can refer to the implementation scheme of the method for determining the lateral runoff of groundwater in an irregular area in any of the above embodiments, and will not be repeated here.

[0022] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0023] It should be noted that, in the description of the present invention, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "plurality" refers to at least two.

[0024] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention belong.

[0025] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0026] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0027] In addition, each functional unit in each embodiment of the present invention may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0028] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0029] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0030] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A method for determining lateral runoff of groundwater in an irregular area, characterized in that: include: Get data in the target area; Determine the slope and slope direction of the groundwater level in the target area based on the data in the target area; Segmenting the irregular boundary of the target area according to the slope and aspect of the groundwater level; The lateral runoff of each segmented area is calculated, and the lateral runoff of each segmented area is added together to determine the lateral runoff of groundwater in the target area.

2. The method according to claim 1, characterized in that The data in the target area include: groundwater level grid data, aquifer bottom elevation and permeability coefficient grid data in the target area.

3. The method according to claim 2, characterized in that The step of segmenting the irregular boundary of the target area according to the slope and the slope direction of the groundwater level comprises: According to the slope direction of the groundwater level, the parts of the irregular boundary of the target area located in the same slope direction are segmented in sequence.

4. The method according to claim 3, characterized in that The step of calculating the lateral runoff of each segmented area and adding the lateral runoff of each segmented area to determine the lateral runoff of groundwater in the target area includes: Calculating the average slope aspect, slope and average permeability coefficient grid data of each segmented area; wherein the average slope aspect of the segmented area is the hydraulic gradient, and the slope is the groundwater flow direction; Connecting the segmented areas end to end to form a line segment, and determining the length of the line segment and the direction in which the line segment flows into the segmented areas; Using a grid calculator to subtract the elevation of the aquifer floor from the groundwater level of the target area to obtain the water-passing section height of the target area, and using a zoning statistics tool to calculate the average height of each segmented area; Determine the lateral runoff of the segmented area by a calculation formula according to the hydraulic gradient of the segmented area, the groundwater flow direction, the average permeability grid data, the average height, the length of the line segment and the direction in which the line segment flows into each segmented area; The lateral runoff of each segmented area is added together to determine the lateral runoff of groundwater in the target area.

5. A device for determining lateral runoff of groundwater in irregular areas, characterized in that: The invention comprises a processor and a memory, wherein the processor is connected to the memory: Wherein, the processor is used to call and execute the program stored in the memory; The memory is used to store the program, and the program is at least used to execute the method for determining the lateral runoff of groundwater in an irregular area as described in any one of claims 1-4.

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