Method and device for demarcating catchment basin of small watershed in key leakage zone of karst area

Abstract

The present disclosure provides a method for delineating a catchment basin of a key leakage zone in a karst area, including: determining a small watershed through a surface water divide; interpreting a number of slope lines for each of the small watersheds; for each of the slope lines, using the inflection points of the slope line that appear near a predetermined slope of the slope line as reference control points to generate reference control points corresponding to the number of slope lines; and connecting the reference control points, and the connection lines are the boundaries of the catchment basins of the strong leakage zones. The present disclosure also provides a device, an electronic device, and a readable storage medium for delineating a catchment basin of a key leakage zone in a karst area.

Description

Technical Field

[0001] The present disclosure belongs to the technical field of ecological environment protection, and particularly relates to a method, device, electronic device and readable storage medium for delineating a small watershed catchment basin in a key leakage zone in a karst area. Background Art

[0002] The terrain of City A is high in the south and low in the north. The southern part is the remaining vein of Mount Tai, and the northern part is a plain, providing topographic conditions for the groundwater to converge and move from south to north. Its unique karst landform provides space for the groundwater to converge and flow. In the northern part of the urban area of City A, there is a weakly permeable igneous intrusion, forming the northern water-blocking boundary of a certain spring basin in City A. Moreover, the igneous rock interpenetrates and intrudes between the limestone layers, forming the top and bottom plates of the confined aquifer of the karst groundwater in the spring basin. Therefore, the spring water gushes out along the bedding structure. The southern mountainous area is the recharge area of the spring water in a certain spring basin in the city and the source of the spring water. It is precisely due to the continuous recharge of the southern mountainous area to the groundwater in the spring basin that the "Spring City" with many spring groups distributed has earned its reputation. The key leakage zone in the spring basin is a limestone area. Due to geological tectonic actions, structural types such as faults and folds are formed. The karst fissures are dense, the horizontal and vertical fractures are obvious, and karst landforms such as solution fissures, karst caves, and sinkholes are well developed, forming an area where the recharge capacity of surface water to groundwater is strong and the recharge speed is fast.

[0003] The catchment basin of the key leakage zone is based on small watersheds. Based on the topography and terrain slope, starting from the centers of the main valleys, rivers, and depressions where the strong leakage zone is located, radiating to the surrounding mountains, using the topographic slope line as the cutting line, the first point with the largest slope change from the bottom is used as the control point for delineating the protected area of the key leakage zone. Taking the control points as nodes and relying on the topographic contour lines, the catchment areas such as valleys, rivers, and depressions in the mountainous area are formed. Summary of the Invention

[0004] To solve at least one of the above technical problems, the present disclosure provides a method, device, electronic device and readable storage medium for delineating a catchment basin in a key leakage zone in a karst area.

[0005] According to one aspect of the present disclosure, a method for delineating a catchment basin in a key leakage zone in a karst area is provided, including:

[0006] Determining small watersheds through surface water divides;

[0007] Interpreting a number of slope lines for each of the small watersheds;

[0008] For each of the slope lines, using the inflection points of the slope line that appear near the predetermined slope of the slope line as reference control points to generate reference control points corresponding to the number of slope lines; and,

[0009] Connecting the reference control points, and the connection line is the boundary of the catchment basin of the strong leakage zone.

[0010] The method for delineating a catchment basin of a key leakage zone in a karst area according to at least one embodiment of the present disclosure, wherein determining a small watershed through a surface water divide includes:

[0011] Converting a topographic map with a predetermined scale into a DEM digital elevation map, and determining a small watershed based on the DEM digital elevation map.

[0012] The method for delineating a catchment basin of a key leakage zone in a karst area according to at least one embodiment of the present disclosure, wherein the inflection point is the maximum point of the second derivative of a function, and the function represents the variation relationship between the independent variable being the straight-line distance of the slope projection and the dependent variable being the ground elevation.

[0013] The method for delineating a catchment basin of a key leakage zone in a karst area according to at least one embodiment of the present disclosure, wherein the predetermined slope is at least one of different slope levels, the slope levels are determined based on the data of the DEM digital elevation map, and the DEM digital elevation map is determined by converting a topographic map with a predetermined scale.

[0014] According to another aspect of the present disclosure, there is provided a device for delineating a catchment basin of a key leakage zone in a karst area, including:

[0015] A small watershed determination module for determining a small watershed through a surface water divide;

[0016] A slope line generation module for interpreting a plurality of slope lines for each of the small watersheds;

[0017] A reference control point generation module, for each of the slope lines, taking the inflection points of the slope lines that appear near a predetermined angle of the slope line as reference control points, and generating reference control points corresponding to the number of slope lines; and,

[0018] A catchment basin boundary line generation module for connecting the reference control points, and the connection line is the boundary of the catchment basin of the strong leakage zone.

[0019] The device for delineating a catchment basin of a key leakage zone in a karst area according to at least one embodiment of the present disclosure, wherein determining a small watershed through a surface water divide includes:

[0020] Converting a topographic map with a predetermined scale into a DEM digital elevation map, and determining a small watershed based on the DEM digital elevation map.

[0021] The device for delineating a catchment basin of a key leakage zone in a karst area according to at least one embodiment of the present disclosure, wherein the inflection point is the maximum point of the second derivative of a function, and the function represents the variation relationship between the independent variable being the straight-line distance of the slope projection and the dependent variable being the ground elevation.

[0022] The device for demarcating the catchment basin of the key leakage zone in the karst area according to at least one embodiment of the present disclosure, the predetermined slope is at least one of different slope levels, the slope levels are determined based on the data of the DEM digital elevation model, and the DEM digital elevation model is determined based on the conversion of the topographic map at a predetermined scale.

[0023] According to another aspect of the present disclosure, there is provided an electronic device, including:

[0024] A memory that stores execution instructions; and,

[0025] A processor that executes the execution instructions stored in the memory, so that the processor executes the method described in any one of the above.

[0026] According to another aspect of the present disclosure, there is provided a readable storage medium, in which execution instructions are stored, and when the execution instructions are executed by a processor, they are used to implement the method described in any one of the above. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings illustrate exemplary embodiments of the present disclosure and, together with the description thereof, are used to explain the principles of the present disclosure. These drawings are included to provide a further understanding of the present disclosure, and the drawings are included in this specification and form a part of this specification.

[0028] Figure 1 It is a schematic flowchart of the method for demarcating the catchment basin of the key leakage zone in the karst area according to one embodiment of the present disclosure.

[0029] Figure 2 It is a schematic structural diagram of the device for demarcating the catchment basin of the key leakage zone in the karst area according to one embodiment of the present disclosure.

[0030] Figure 3 It is a schematic diagram of the mountain slope line according to one embodiment of the present disclosure.

[0031] Figure 4 It is a schematic diagram of the mountain slope according to one embodiment of the present disclosure.

[0032] Figure 5 It is a schematic diagram of the mountain slope change value according to one embodiment of the present disclosure.

[0033] Explanation of Reference Numerals

[0034] 1000 Device for demarcating the catchment basin of the key leakage zone in the karst area

[0035] 1002 Small watershed determination module

[0036] 1004 Slope line generation module

[0037] 1006 Benchmark Control Point Generation Module

[0038] 1008 Catchment Basin Boundary Line Generation Module

[0039] 1100 Bus

[0040] 1200 Processor

[0041] 1300 Memory

[0042] 1400 Other Circuits Detailed Implementation Manner

[0043] The present disclosure will be further described in detail below in conjunction with the accompanying drawings and the implementation manner. It can be understood that the specific implementation manner described herein is only used to explain the relevant content and does not limit the present disclosure. Additionally, it should be noted that for the convenience of description, only the parts related to the present disclosure are shown in the accompanying drawings.

[0044] It should be noted that, without conflict, the implementation manners and the features in the implementation manners in the present disclosure may be combined with each other. The technical solutions of the present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with the implementation manner.

[0045] Unless otherwise specified, the exemplary implementation manners / embodiments shown will be understood to provide exemplary features of various details of some ways that can implement the technical concept of the present disclosure in practice. Therefore, unless otherwise specified, without departing from the technical concept of the present disclosure, the features of various implementation manners / embodiments may be additionally combined, separated, interchanged, and / or rearranged.

[0046] In the accompanying drawings, cross-hatching and / or shading are generally used to make the boundaries between adjacent components clear. Thus, unless otherwise stated, the presence or absence of cross-hatching or shading does not convey or indicate any preference or requirement for the specific material, material properties, dimensions, proportions, commonalities between the components shown, and / or any other characteristics, attributes, properties, etc. of the components. Additionally, in the accompanying drawings, for the purpose of clarity and / or description, the dimensions and relative dimensions of the components may be exaggerated. When the exemplary embodiments can be implemented differently, the specific process sequences may be performed in an order different from that described. For example, two consecutively described processes may be performed substantially simultaneously or in an order opposite to that described. Moreover, the same reference numerals denote the same components.

[0047] When a component is referred to as being "on" or "above" another component, "connected to" or "coupled to" another component, the component can be directly on the other component, directly connected to or directly coupled to the other component, or there can be intermediate components. However, when a component is referred to as being "directly on" another component, "directly connected to" or "directly coupled to" another component, there are no intermediate components. For this reason, the term "connected" can refer to a physical connection, an electrical connection, etc., and can have or not have intermediate components.

[0048] The terms used herein are for the purpose of describing particular embodiments and are not intended to be limiting. As used herein, unless the context clearly dictates otherwise, the singular forms "a", "an" and "the" are also intended to include the plural forms. In addition, when the terms "comprises" and / or "comprising" and their variants are used in this specification, it is stated that there are the stated features, integers, steps, operations, components, assemblies and / or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, assemblies and / or groups thereof. It should also be noted that, as used herein, the terms "substantially", "about" and other similar terms are used as approximate terms and not as terms of degree, and thus they are used to account for the inherent deviations of measured, calculated and / or provided values that would be recognized by a person of ordinary skill in the art.

[0049] Figure 1 is a schematic flow diagram of a method for delineating catchment basins in key leakage zones in karst areas according to an embodiment of the present disclosure.

[0050] As Figure 1 shown, the method S100 for delineating catchment basins in key leakage zones in karst areas includes:

[0051] S102: Determine small watersheds through surface water divides;

[0052] S104: Interpret a number of slope lines for each small watershed;

[0053] S106: For each slope line, use the inflection points of the slope line that appear near the predetermined slope of the slope line as reference control points to generate reference control points corresponding to the number of slope lines; and,

[0054] S108: Connect the reference control points, and the connection is the boundary of the catchment basin of the strong leakage zone.

[0055] Among them, in S102, determining small watersheds through surface water divides includes:

[0056] Convert a topographic map at a predetermined scale into a DEM digital elevation map, and determine small watersheds based on the DEM digital elevation map. Preferably, the predetermined scale is 1:10000.

[0057] Among them, in S104, 4 - 6 slope lines can be determined for each small watershed.

[0058] Among them, in S106, the inflection point is the maximum point of the second derivative of the function. The function represents the variation relationship between the independent variable of the slope projection straight - line distance and the dependent variable of the ground elevation. Specifically, between the gully and the mountain body, for the slope - line inflection points that appear near 10°, 4 - 6 control points can be determined for each small watershed.

[0059] Among them, the function is represented as follows:

[0060] Slope - line function: y = f(x);

[0061] Gradient - line function is: y = f′(x);

[0062] Gradient - change - rate function is:

[0063] Among them, x represents the slope projection straight - line distance, y represents the ground elevation, and the slope control point is the maximum point of the gradient - change - rate function. Combining with on - site GPS measurement, the maximum point of the gradient change near 10° is interpreted, and this point is used as the key control point for dividing the protected area of the key leakage zone.

[0064] Among them, in S106, the predetermined slope is at least one of different slope levels. The slope levels are determined based on the data of the DEM digital elevation model, and the DEM digital elevation model is determined by converting the topographic map at a predetermined scale.

[0065] Among them, the DEM model can be used for topographic analysis. Through the DEM, the topographic situation of any point in the relevant area can be obtained, the elevation of any point can be calculated, and combined with adjacent units for analysis, slope, aspect, ground roughness, ridge line, valley line, and elevation change analysis can be carried out, and landform classification and topographic profile line drawing can be performed.

[0066] Among them, the topographic slope levels are divided into three levels, namely 0 - 10°, 10° - 20°, and 20° - 90°.

[0067] Among them, in S108, the area inside the connection line is the water - collecting basin of the strong leakage zone, and the connection line is the control line of the water - collecting basin of the strong leakage zone. Starting from the centers of the main gullies, river channels, and depressions where the strong leakage zone is located, radiating to the surrounding mountains, with the topographic slope line as the cutting line, the first inflection - point area of the slope change starting from the bottom is the water - collecting basin of the key leakage zone.

[0068] Figure 2 It is a schematic structural diagram of a device for demarcating the water - collecting basin of the key leakage zone in a karst area according to an embodiment of the present disclosure.

[0069] As Figure 2 shown, the catchment basin delineation device 1000 for the key leakage zones in the karst area includes:

[0070] A small watershed determination module 1002 that determines small watersheds through surface water divides;

[0071] A slope line generation module 1004 that interprets a number of slope lines for each small watershed;

[0072] A reference control point generation module 1006 that, for each slope line, uses the inflection points of the slope line that appear near a predetermined angle of the slope line as reference control points to generate reference control points corresponding to the number of slope lines; and,

[0073] A catchment basin boundary line generation module 1008 that connects the reference control points, and the connected line is the boundary of the catchment basin of the strong leakage zone.

[0074] Among them, determining small watersheds through surface water divides includes:

[0075] Converting a topographic map at a predetermined ratio into a DEM digital elevation map, and determining small watersheds based on the DEM digital elevation map.

[0076] Among them, the inflection point is the maximum point of the second derivative of the function, and the function represents the variation relationship between the independent variable as the straight-line distance of the slope projection and the dependent variable as the ground elevation.

[0077] Among them, the predetermined slope is at least one of different slope levels, the slope levels are determined based on the data of the DEM digital elevation map, and the DEM digital elevation map is determined based on the conversion of a topographic map at a predetermined ratio.

[0078] The method and device for delineating the catchment basin of the key leakage zones in the karst area provided by the present disclosure determine the main catchment and groundwater infiltration recharge areas of small watersheds through the interpretation of slope lines of topographic slopes. This method and device can quickly and accurately interpret and calculate inflection points and form vector data by connecting the inflection points with contour lines, which is of great significance for the protection of the key recharge areas of karst water in mountainous areas.

[0079] Figure 3 It is a schematic diagram of a mountain slope line according to an embodiment of the present disclosure.

[0080] Figure 4 It is a schematic diagram of a mountain slope according to an embodiment of the present disclosure.

[0081] Figure 5 It is a schematic diagram of the change value of the mountain slope according to an embodiment of the present disclosure.

[0082] According to another aspect of the present disclosure, there is provided an electronic device, including:

[0083] A memory that stores execution instructions; and,

[0084] A processor that executes the execution instructions stored in the memory, such that the processor executes the method of any one of the above.

[0085] According to another aspect of the present disclosure, there is provided a readable storage medium storing execution instructions that, when executed by a processor, are used to implement the method of any one of the above.

[0086] Figure 2 An example diagram of a device adopting a hardware implementation manner of a processing system is shown. The device may include corresponding modules that execute each or several steps in the above flowchart. Therefore, each step or several steps in the above flowchart may be executed by the corresponding modules, and the device may include one or more of these modules. The modules may be one or more hardware modules specifically configured to execute the corresponding steps, or implemented by a processor configured to execute the corresponding steps, or stored in a computer-readable medium for implementation by a processor, or implemented through a certain combination.

[0087] This hardware structure may be implemented using a bus architecture. The bus architecture may include any number of interconnecting buses and bridges, depending on the specific application of the hardware and overall design constraints. The bus 1100 connects various circuits including one or more processors 1200, a memory 1300, and / or hardware modules together. The bus 1100 may also connect various other circuits 1400 such as peripheral devices, voltage regulators, power management circuits, external antennas, etc.

[0088] The bus 1100 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Component (EISA) bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, only one connecting line is shown in this figure, but it does not mean that there is only one bus or one type of bus.

[0089] Any process or method description represented in a flowchart or otherwise described herein can be understood to represent a module, segment, or portion of code including one or more executable instructions for implementing a specific logical function or process. The scope of the preferred embodiments of the present disclosure includes additional implementations, where functions may be performed in an order not shown or discussed, including in a substantially simultaneous manner or in a reverse order according to the functions involved, which should be understood by those skilled in the art to which the embodiments of the present disclosure pertain. A processor executes the various methods and processes described above. For example, the method embodiments in the present disclosure can be implemented as a software program, which is tangibly contained in a machine-readable medium, such as a memory. In some embodiments, part or all of the software program can be loaded and / or installed via the memory and / or communication interface. When the software program is loaded into the memory and executed by the processor, one or more steps of the methods described above can be performed. Alternatively, in other embodiments, the processor can be configured to execute one of the above methods in any other suitable manner (e.g., by means of firmware).

[0090] The logic and / or steps represented in a flowchart or otherwise described herein can be embodied in any readable storage medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, a system including a processor, or other systems that can fetch instructions from and execute instructions.

[0091] As used in this specification, a "readable storage medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the readable storage medium include the following: an electrical connection portion having one or more wirings (electronic device), a portable computer diskette (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable read-only memory (CDROM). Additionally, the readable storage medium can even be paper or other suitable medium on which a program can be printed, as the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpretation, or otherwise processing as appropriate, and then storing it in a memory.

[0092] It should be understood that various parts of the present disclosure can be implemented by hardware, software, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented by software 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 techniques well known 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.

[0093] Those of ordinary skill in the art of this technology can understand that all or part of the steps for implementing the above embodiments can be completed by a program instructing relevant hardware. The program can be stored in a readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiments.

[0094] In addition, in each of the various embodiments of the present disclosure, the functional units can be integrated into one 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 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 readable storage medium. The storage medium can be a read-only memory, a magnetic disk, an optical disk, etc.

[0095] In the description of this specification, the description with reference to terms such as "one embodiment / way", "some embodiments / ways", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with that embodiment / way or example are included in at least one embodiment / way or example of the present application. In this specification, the schematic representations of the above terms are not necessarily the same embodiment / way or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments / ways or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments / ways or examples described in this specification and the features of different embodiments / ways or examples.

[0096] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0097] Those skilled in the art should understand that the above embodiments are only for clearly explaining the present disclosure and are not intended to limit the scope of the present disclosure. For those skilled in the art, other changes or modifications can be made based on the above disclosure, and these changes or modifications are still within the scope of the present disclosure.

Claims

1. A method for demarcating a catchment basin in a key leakage zone in a karst area, characterized in that Comprising: Determining small watersheds through surface water divides; wherein, determining small watersheds through surface water divides includes converting a topographic map with a predetermined scale into a DEM digital elevation model, and determining small watersheds based on the DEM digital elevation model; wherein, the predetermined scale is 1:10,000; Interpreting a number of slope lines for each of the small watersheds; wherein, the number of slope lines is 4 - 6 slope lines; For each of the slope lines, using the inflection points of the slope line that appear near the predetermined slope of the slope line as reference control points to generate reference control points corresponding to the number of slope lines, wherein, the inflection point is the maximum point of the second derivative of a function, and the function represents the variation relationship between the independent variable of the projected straight-line distance of the slope and the dependent variable of the ground elevation; and Connecting the reference control points, and this connection is the boundary of the strong leakage zone catchment basin, and the internal area of the connection is the strong leakage zone catchment basin; starting from the center of the main gully, river, and depression where the strong leakage zone catchment basin is located, radiating towards the surrounding mountains, using the topographic slope line as the cutting line, the first inflection point area of the slope change starting from the bottom is the key leakage zone catchment basin.

2. The method for delineating the water collection basin of the key leakage zone in the karst area according to claim 1, characterized in that, The predetermined slope is at least one of different slope levels, and the slope levels are determined based on the data of the DEM digital elevation model, and the DEM digital elevation model is determined based on the conversion of a topographic map with a predetermined scale.

3. A device for demarcating a catchment basin in a key leakage zone in a karst area, characterized in that, Comprising: A small watershed determination module that determines small watersheds through surface water divides; wherein, determining small watersheds through surface water divides includes converting a topographic map with a predetermined scale into a DEM digital elevation model, and determining small watersheds based on the DEM digital elevation model; wherein, the predetermined scale is 1:10,000; A slope line generation module that interprets a number of slope lines for each of the small watersheds; wherein, the number of slope lines is 4 - 6 slope lines; A reference control point generation module that, for each of the slope lines, uses the inflection points of the slope line that appear near the predetermined slope of the slope line as reference control points to generate reference control points corresponding to the number of slope lines, wherein, the inflection point is the maximum point of the second derivative of a function, and the function represents the variation relationship between the independent variable of the projected straight-line distance of the slope and the dependent variable of the ground elevation; and A catchment basin boundary line generation module that connects the reference control points, and this connection is the boundary of the strong leakage zone catchment basin, and the internal area of the connection is the strong leakage zone catchment basin; starting from the center of the main gully, river, and depression where the strong leakage zone catchment basin is located, radiating towards the surrounding mountains, using the topographic slope line as the cutting line, the first inflection point area of the slope change starting from the bottom is the key leakage zone catchment basin.

4. The water-collecting basin delineation device for key leakage zones in karst areas according to claim 3, characterized in that, The predetermined slope is at least one of different slope levels, and the slope levels are determined based on the data of the DEM digital elevation model, and the DEM digital elevation model is determined based on the conversion of a topographic map with a predetermined scale.

5. An electronic device, characterized in that, Comprising: A memory that stores execution instructions; And A processor that executes the execution instructions stored in the memory, such that the processor executes the method according to any one of claims 1 to 2.

6. A readable storage medium, characterized in that, The readable storage medium stores execution instructions, which are used to implement the method according to any one of claims 1 to 2 when executed by a processor.

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