Method and device for determining lateral groundwater runoff in irregular regions

Abstract

The present invention relates to the technical field of groundwater exploration, and specifically relates to a method and device for determining the lateral runoff of groundwater in an irregular area. In this method, data within the target area is first obtained, and based on the data within the target area, the slope and aspect of the groundwater level within the target area are determined. Then, according to the slope and aspect of the groundwater level, the irregular boundary of the target area is segmented. Finally, 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. Different from the existing raster overlay method for calculating the lateral runoff of groundwater based on GIS, the present application is more simple and fast; moreover, it solves the problem of determining the lateral runoff of groundwater in an irregular study area, breaks through the limitation of the irregular range of the study area in most groundwater resource evaluation works, and thus better serves the work of groundwater resource evaluation.

Description

Technical Field

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

[0002] In the evaluation of groundwater resources, the lateral runoff is an important item of water balance, an important part of regional groundwater, and has a great influence on the direction and velocity of groundwater movement in the groundwater flow field; it will cause changes in the groundwater table depth, which is of great significance for engineering construction; it also determines the exploitable amount of groundwater and is closely related to human life. At present, to calculate the regional groundwater lateral runoff, Darcy's law is generally used, that is: , this method is mostly applied to the case where the single-width head difference on both sides of the section is equal; at present, there is also a calculation method for the lateral runoff of groundwater within the region based on the spatial superposition method of ArcGIS, but it is only applicable to the calculation of the lateral runoff on a regular boundary section. However, most of the research scopes of groundwater resources evaluation are irregular. For the research on the evaluation of groundwater resources with irregular boundaries, there is an urgent need for a new method to calculate the lateral runoff of groundwater under the condition of an irregular research scope, so as to provide an accurate lateral runoff recharge amount for the research of groundwater resources. Summary of the Invention

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

[0004] To achieve the above purpose, the present invention adopts the following technical solutions:

[0005] On the one hand, the present application provides a method for determining the lateral runoff of groundwater in an irregular area, including:

[0006] Obtain the data within the target area;

[0007] Determine the slope and aspect of the groundwater level within the target area according to the data within the target area;

[0008] Segment the irregular boundary of the target area according to the slope and aspect of the groundwater level;

[0009] 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.

[0010] Further, in the above method, the data within the target area includes: the groundwater level raster data of the target area, the elevation of the aquifer bottom plate, and the permeability coefficient raster data.

[0011] Further, for the method described above, segmenting the irregular boundary of the target area according to the slope and aspect of the groundwater level includes:

[0012] According to the aspect of the groundwater level, segment the parts of the irregular boundary of the target area that are in the same aspect in sequence.

[0013] Further, for the method described above, 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:

[0014] Calculate the average aspect, slope, and average permeability coefficient raster data of each segmented area; wherein the average aspect of the segmented area is the hydraulic gradient, and the slope is the groundwater flow direction;

[0015] Connect the head and tail of each segmented area 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;

[0016] Use a raster calculator to subtract the elevation of the aquifer bottom from the groundwater level height of the target area to obtain the cross-sectional height of the target area, and use a zonal statistics tool to calculate the average height of each segmented area;

[0017] According to the hydraulic gradient, groundwater flow direction, average permeability coefficient raster data, average height of the segmented area, and the length of the line segment and the direction in which the line segment flows into each segmented area, determine the lateral runoff of the segmented area through a calculation formula;

[0018] Add the lateral runoff of each segmented area to determine the lateral runoff of groundwater in the target area.

[0019] On the other hand, the present application provides an apparatus for determining the lateral runoff of groundwater in an irregular area, including a processor and a memory, and the processor is connected to the memory:

[0020] Wherein, the processor is configured to call and execute a program stored in the memory;

[0021] The memory is configured 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 described in any one of the above.

[0022] The beneficial effects of the present invention are:

[0023] This application first obtains the data within the target area, determines the slope and aspect of the groundwater level within the target area based on the data within the target area, then segments the irregular boundary of the target area according to the slope and aspect of the groundwater level, and finally calculates the lateral runoff of each segmented area and adds up the lateral runoff of each segmented area to determine the lateral groundwater runoff of the target area. This application is different from the existing raster overlay method for calculating lateral groundwater runoff based on GIS, and is more simple and fast; moreover, it solves the problem of calculating the lateral groundwater runoff in an irregular study area, breaks through the limitation of the irregular range of the study area in most groundwater resource evaluation work, and thus better serves the work of groundwater resource evaluation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0025] Figure 1 is a flowchart provided by an embodiment of a method for determining the lateral groundwater runoff in an irregular area of the present invention;

[0026] Figure 2 is a schematic structural diagram provided by an embodiment of a device for determining the lateral groundwater runoff in an irregular area of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following will describe the technical solutions of the present invention in detail. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the scope protected by the present invention.

[0028] Figure 1 is a flowchart provided by an embodiment of a method for determining the lateral groundwater runoff in an irregular area of the present invention. Please refer to Figure 1 , and this embodiment may include the following steps:

[0029] S1. Obtain the data within the target area;

[0030] S2. Determine the slope and aspect of the groundwater level within the target area based on the data within the target area;

[0031] S3. Segment the irregular boundary of the target area according to the slope and aspect of the groundwater level;

[0032] S4. Calculate the lateral runoff of each segmented area, and add up the lateral runoff of each segmented area to determine the lateral groundwater runoff of the target area.

[0033] It can be understood that currently, for the calculation of lateral groundwater runoff, there are mainly two situations. First, the unit-width flow is the same everywhere (the water head difference between the left and right sides of the section is the same everywhere), and the unit-width flow at one place can be calculated using a simple Darcy formula and then multiplied by the length. Second, for a regular boundary range, methods such as ArcGIS spatial overlay and raster calculation are used to calculate the lateral runoff at each place of the regular boundary. However, in reality, since the research area in most groundwater resource evaluation work is irregular (such as a basin, etc.), for the boundary parallel to the groundwater flow direction, the actual groundwater flow into the area is zero, and the above methods are not simple. In this application, data within the target area is first obtained, and based on the data within the target area, the slope and aspect of the groundwater level within the target area are determined. Then, according to the slope and aspect of the groundwater level, the irregular boundary of the target area is segmented. Finally, the lateral runoff of each segmented area is calculated, and the lateral runoff of each segmented area is added up to determine the lateral groundwater runoff of the target area. This application is different from the existing raster overlay method for calculating lateral groundwater runoff based on GIS. This application is more simple and fast; and it solves the problem of calculating the lateral groundwater runoff in an irregular research area, breaking the limitation of the irregular research area in most groundwater resource evaluation work, so as to better serve the groundwater resource evaluation work.

[0034] Preferably, the data within the target area includes: the groundwater level raster data of the target area, the elevation of the aquifer bottom plate, and the permeability coefficient raster data.

[0035] It can be understood that the groundwater level raster data of the target area can be obtained by water level interpolation.

[0036] Preferably, step S3 includes:

[0037] According to the aspect of the groundwater level, the parts of the irregular boundary of the target area in the same aspect are segmented in sequence.

[0038] Preferably, step S4 includes:

[0039] Calculate the average aspect, slope, and average permeability coefficient raster data of each segmented area; where the average aspect of the segmented area is the hydraulic gradient, and the slope is the groundwater flow direction;

[0040] Connect the head and tail of each segmented area into a line segment, and determine the length of the line segment and the direction of the line segment flowing into each segmented area;

[0041] Use the raster calculator to subtract the elevation of the aquifer floor from the groundwater level height in the target area to obtain the cross-sectional height of the target area, and use the zonal statistics tool to calculate the average height of each segmented area;

[0042] According to the hydraulic gradient, groundwater flow direction, average permeability coefficient raster data, average height of the segmented area, as well as the length of the line segment and the direction of the line segment flowing into each segmented area, determine the lateral runoff of the segmented area through the calculation formula;

[0043] Add up the lateral runoff of each segmented area to determine the lateral groundwater runoff of the target area.

[0044] It can be understood that the parts of the irregular boundary located in the same slope direction (the same wave band) are segmented in sequence according to the slope direction, and these segments are used as areas. The average slope direction, slope, and permeability coefficient raster data of these segments are statistically analyzed by zone; at this time, the slope is the hydraulic gradient of this segment ; the slope direction is the groundwater flow direction ; the average permeability coefficient within the area is 。 Then connect the head and tail of each segment into a line segment, and the length of the line segment is 、 the direction of flowing into the area (the normal of the line segment) 。 Use the raster calculator to subtract the elevation of the aquifer floor from the groundwater level height to obtain the cross-sectional height; and use the zonal statistics tool to calculate the average height of the segment 。 After calculating the lateral runoff of each segment according to Darcy's formula, add them up to obtain the total lateral runoff. The calculation formula is:

[0045]

[0046] The present invention also provides an apparatus for determining the lateral groundwater runoff in an irregular area, which is used to implement the above method embodiments. Figure 2 It is a schematic structural diagram provided by an embodiment of an apparatus for determining the lateral groundwater runoff in an irregular area of the present invention. As Figure 2 shown, the apparatus for determining the lateral groundwater runoff 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. Among them, 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 groundwater runoff in an irregular area in the above embodiments.

[0047] The specific implementation scheme of the apparatus for determining the lateral groundwater runoff in an irregular area provided by the embodiments of the present application can refer to the implementation manners of the method for determining the lateral groundwater runoff in an irregular area in any of the above embodiments, and will not be elaborated here.

[0048] It is understandable that the same or similar parts in the above embodiments can be referred to each other, and the content not described in detail in some embodiments can be referred to the same or similar content in other embodiments.

[0049] 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 "a plurality of" refers to at least two.

[0050] Any process or method description in the flowchart or described in other ways herein can be understood as representing a module, segment, or part of code including one or more executable instructions for implementing a specific logical function or process. And the scope of the preferred embodiments of the present invention includes additional implementations, where the functions can be executed in a substantially simultaneous manner or in the reverse order according to the involved functions, rather than in the order shown or discussed, which should be understood by those skilled in the technical field of the embodiments of the present invention.

[0051] 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 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, any one or a combination of the following well-known technologies in the art can be used: discrete logic circuits with logic gate circuits for implementing logical functions on data signals, application-specific integrated circuits with appropriate combinational logic gate circuits, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0052] Those of ordinary skill in the technical field of the present invention can understand that all or part of the steps carried by the methods of the above embodiments can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiments.

[0053] In addition, each functional unit in the various embodiments of the present invention can be integrated into a processing module, or each unit can exist physically alone, or two or more units can be integrated into one module. The above integrated module can be implemented in the form of hardware or in the form of a software functional module. When the above integrated module is implemented in the form of a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0054] The above-mentioned storage medium can be a read-only memory, a magnetic disk, an optical disc, etc.

[0055] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do 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.

[0056] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for determining the lateral groundwater runoff in an irregular area, characterized in that, Including: Obtaining data within a target area; wherein the data within the target area includes groundwater level grid data of the target area, aquifer floor elevation, and permeability coefficient grid data; Determining the slope and aspect of the groundwater level within the target area based on the data within the target area; Segmenting in sequence the parts of the irregular boundary of the target area that are in the same aspect according to the aspect of the groundwater level; Calculating the average aspect, slope, and average permeability coefficient grid data of each segmented area; wherein the average aspect of the segmented area is the hydraulic gradient and the slope is the groundwater flow direction; Connecting the head and tail of each segmented area into a line segment, and determining the length of the line segment and the direction in which the line segment flows into each segmented area; Using a raster calculator to subtract the aquifer floor elevation from the groundwater level height of the target area to obtain the cross-sectional height of the target area through which water flows, and using a zonal statistics tool to calculate the average height of each segmented area; Determining the lateral runoff of each segmented area through a calculation formula based on the hydraulic gradient, groundwater flow direction, average permeability coefficient grid data, average height of the segmented area, and the length of the line segment and the direction in which the line segment flows into each segmented area; Adding the lateral runoff of each segmented area to determine the lateral groundwater runoff of the target area.

2. An apparatus for determining the lateral groundwater runoff in an irregular area, characterized in that, Including a processor and a memory, the processor being connected to the memory: Wherein, the processor is used to call and execute a 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 groundwater runoff of an irregular area described in claim 1.

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