KR20170097826A - Method for planning of constructing a dam based on a digital elevation model, apparatus, and recording medium thereof - Google Patents

Method for planning of constructing a dam based on a digital elevation model, apparatus, and recording medium thereof Download PDF

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KR20170097826A
KR20170097826A KR1020160019223A KR20160019223A KR20170097826A KR 20170097826 A KR20170097826 A KR 20170097826A KR 1020160019223 A KR1020160019223 A KR 1020160019223A KR 20160019223 A KR20160019223 A KR 20160019223A KR 20170097826 A KR20170097826 A KR 20170097826A
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dam
area
elevation model
virtual
digital elevation
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KR101782559B1 (en
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박재영
유능환
노준우
정지영
원영진
장우정
정영심
박상훈
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한국수자원공사
(주)헤르메시스
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Abstract

The present invention relates to a dam construction planning method, an apparatus therefor, and a recording medium on which the dam construction method is performed. The dam construction planning method according to the present invention is characterized in that the original numerical elevation model for the dam construction candidate area is filled with a depression in the dam construction candidate area Generating an elevation value of the grid cell corresponding to the position of the virtual dam by a height of the virtual dam in the first numerical elevation model in which the depression process is performed, and generating a second digital elevation model in which the virtual dam is simulated; Creating a third digital elevation model in which the depression process is performed to fill the depression with respect to the second digital elevation model; Comparing the first digital elevation model with the third digital elevation model to extract a change area changed due to the virtual dam; And a volume and an area of a difference area in which altitude values of grid cells of the third numerical elevation model differ from each other in the original numerical elevation model corresponding to the position of the change area, .
Through this, it is possible to minimize the approximation and improve the accuracy of the calculation of the low capacity and the storage area to support the optimum planning for dam construction.

Description

TECHNICAL FIELD [0001] The present invention relates to a dam construction method based on a numerical elevation model, a device for the dam construction method, and a recording medium on which the dam construction plan is recorded. [0002]

The present invention relates to a dam construction planning method, an apparatus therefor, and a recording medium storing the same, and more particularly, to a technique for supporting planning establishment for dam construction through simulation based on a digital elevation model.

It is important to establish an optimal dam construction plan in advance as it is a structure that is constructed by crossing valleys and rivers, and the construction of the dam, which plays a role of prevention of soil leakage, prevention of water intake, storage of water, Do.

In particular, when constructing a dam, whether or not it meets the water demand expected under the possible hydrological conditions in the future will be the main concern. Therefore, the reservoir capacity is analyzed in multiple angles by simulating the dam site, And the process of determining the size of the dam should be preceded.

Figure 1 schematically illustrates a prior art that yields a reduced scale.

1, a cross-sectional area A according to a depth z is calculated based on contour line data around a watershed to obtain a water storage area, and the volume V between each cross-section is summed up, . However, the above-described prior art has the following limitations.

According to the above conventional art, an error due to the application of both cross sectional average methods occurs in the calculation of the volume between each cross section. In addition, although the prior art assumes an ideal situation as a simple contour contour line, since the actual contour line is an exceptional case where the existence of a discontinuous point and a plurality of contour lines is included, an error due to the approximation in the sectional area and volume calculation is inevitable There is a problem that the accuracy of the estimation of the amount of water is inferior.

Since the capacity and the area of the reservoir are the main data for determining the size of the dam, the accurate estimation is very important factor for the successful construction of the dam. Therefore, there is a strong demand for a method to support optimal planning for dam construction by accurately estimating low capacity and water storage area.

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the problems of the prior art described above, and it is an object of the present invention to provide a dam construction planning method and apparatus, and a recording medium on which the dam construction planning method and apparatus can improve the accuracy of low capacity and low water area calculation based on a digital elevation model .

The above-mentioned object is achieved by providing a method of designing a dam structure for a dam construction candidate area in accordance with an embodiment of the present invention in a first numerical elevation model in which a depression process for filling a depression in the dam construction candidate area is performed, Generating a second numerical elevation model in which the virtual dam is simulated by elevating the altitude value of the grid cell by the height of the virtual dam; Creating a third digital elevation model in which the depression process is performed to fill the depression with respect to the second digital elevation model; Comparing the first digital elevation model with the third digital elevation model to extract a change area changed due to the virtual dam; And a volume and an area of a difference area in which altitude values of grid cells of the third numerical elevation model differ from each other in the original numerical elevation model corresponding to the position of the change area, The dam construction planning method according to the present invention.

The step of calculating the low capacity and the water storage area of the virtual dam may be calculated as the water storage area by summing the areas of the grid cells in the difference area, The difference of the elevation values may be calculated for each grid cell corresponding to each other, and the sum of the volumes of the grid cells whose height is the height difference may be calculated as the low capacity.

In addition, the step of recommending the height of the virtual dam based on the calculated low capacity and the area of the water storage can be further included, thereby effectively guiding establishment of the dam construction plan of the user.

Further, the present invention further includes a step of providing on the map of the dam construction candidate area a screen displaying the change in the low capacity and the water storage area according to the height of the virtual dam through the user interface unit.

The above object can also be achieved by a computer-executable recording medium on which a program for executing the dam construction planning method described above is recorded.

In addition, the above-mentioned object can be achieved by providing a first numerical elevation model in which a depression in the dam construction candidate area is processed with respect to an original numerical elevation model for a dam construction candidate area, which is another embodiment of the present invention, A virtual dam simulator for generating a second digital elevation model in which the elevation of the grid cell corresponding to the elevation is elevated by the height of the virtual dam and simulated by the virtual dam; A concavity processing unit for generating a third digital elevation model by performing a concavity processing for filling the concavity with respect to the second digital elevation model; A change area extracting unit for comparing the first digital elevation model with the third digital elevation model to extract a change area changed due to the virtual dam; And a volume and an area of a difference area in which altitude values of grid cells of the third numerical elevation model differ from each other in the original numerical elevation model corresponding to the position of the change area, And a water level calculation unit for calculating the water level of the dam.

The virtual dam simulation unit simulates the virtual dam by elevating an altitude value of the grid cell based on a maximum value among a plurality of predetermined height values of the virtual dam, By calculating the low capacity and the water storage area of the virtual dam by the height based on the volume and the area of the partial area of the difference area corresponding to the height of the virtual dam, the storage capacity of various heights can be calculated by one operation corresponding to the maximum value Efficiency can be improved.

INDUSTRIAL APPLICABILITY As described above, according to the present invention, it is possible to minimize the approximation and improve the accuracy of the calculation of the low capacity and the storage area, thereby supporting the optimum planning for dam construction.

1 is a schematic view of a method for calculating a low capacity according to the prior art;
2 is a block diagram of a dam construction planning apparatus according to an embodiment of the present invention;
3 is a reference view for explaining a method of extracting a change area due to a virtual dam;
4 is a reference diagram for explaining the calculation of the storage capacity;
5 is a flowchart of a dam construction planning method according to an embodiment of the present invention;
6 is a view showing a topography according to an original digital elevation model and a topography according to a first digital elevation model;
7 is an example of a screen showing a location of a virtual dam on a map of a dam construction candidate area;
8 is a view showing a terrain according to a third numerical elevation model in which a depression after virtual dam simulation is processed;
9 is a view showing the terrain according to the calculated difference area;
10 is an example of a screen for providing information on the calculated storage capacity; And
11 is another example of a screen for providing information on the calculated water level.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

The dam construction planning apparatus according to the present invention supports planning for dam construction based on a digital elevation model (DEM). A digital elevation model is a model in which land is divided into a plurality of grid cells and the elevation of the area corresponding to each grid cell is recorded in a numerical form to represent the undulations of the terrain. The digital elevation model can be created based on the elevation of the topographic map, elevation obtained through aerial photogrammetry, LIDAR survey, etc., and relevant agencies including the Geographical Information Service have constructed a digital elevation model for the Korean peninsula.

2 is a block diagram of a dam construction planning apparatus according to an embodiment of the present invention. 2, the dam construction planning apparatus 100 includes a user interface unit 10, a first depression processing unit 20, a virtual dam simulation unit 30, a second depression processing unit 40, A storage unit 50, a storage capacity calculation unit 60, and a planning guide unit 70.

The user interface unit 10 may be implemented by an input means for inputting information such as a mouse, a keyboard, a button, a keypad, etc., and a GUI on the screen in order to receive input from a user and display various information. A range of the height of the virtual dam to be simulated and the position of the virtual dam to be simulated are input through the user interface unit 10 and the calculated information is displayed to guide the establishment of the dam construction plan such as the estimated water level.

The first sinking processing unit 20 removes the depression by filling the sink in the dam construction candidate region through repetitive calculation based on the altitude value of the grid cell of the original numerical elevation model for the dam construction candidate region. The depression is a point where the flow of water is stopped at one place due to the altitude being lower than that of the surrounding grid cells, so that one grid cell or a set of grid cells may correspond to this.

The first depression processing unit 20 extracts depressions by analyzing altitude values of the grid cells of the numerical elevation model and removes depressions by changing altitude values of the grid cells corresponding to depressions to reflect the altitude values. Such a depression process can be performed through various well-known filling algorithms.

The virtual dam simulation unit 30 simulates the virtual dam on the first numerical elevation model subjected to the depression treatment by the first depression treatment unit 20. [ The simulation of the virtual dam is performed by changing the altitude value of the grid cell corresponding to the position where the virtual dam is to be installed in the first numerical elevation model by the height of the virtual dam. In this case, if the height of the virtual dam to be simulated is plural, the maximum value of the height values is applied to simulate the virtual dam.

Thus, the virtual dam simulation unit 30 generates a second digital elevation model in which the altitude of the grid cell corresponding to the position of the virtual dam in the first digital elevation model is artificially changed in accordance with the height of the virtual dam. According to the second numerical elevation model, a new depression is generated around the grid cell whose elevation value is upwardly simulated with virtual dam simulation.

Subsequently, the second depression processing unit 40 performs a process of removing the depressed portion with respect to the second digital elevation model in which the virtual dam is simulated by the virtual dam simulation unit 30, thereby generating the third digital elevation model. According to this, the depressions generated due to the simulation of the virtual dam are filled.

The change area extracting unit 50 compares the first numerical elevation model subjected to the first depression process by the first depression process unit 20 and the third numerical elevation model subjected to the virtual dam simulation post-depression process, Identify the area of change due to the dam. The change area is a region where altitude values of the grid cells corresponding to each other in the first numerical elevation model and the third numerical elevation model are different from each other. The area where the altitude value changes due to simulation of the virtual dam, . The change area can be obtained by performing a minus operation on the elevation values of the two numerical elevation models corresponding to each other corresponding to the lattice cells.

3 is a reference diagram for explaining a method of extracting a change area due to a virtual dam. 3, an altitude value of the grid cell 'A3' of the third digital elevation model is 5, and a grid of the first digital elevation model corresponding to the grid cell 'A3' The altitude of cell 'A1' is 3, so the difference between two altitudes is 2. In this manner, the defamation region extracting unit 50 performs minus operations on the elevation values of the lattice cells constituting the first and third digital elevation models, thereby excluding the regions irrelevant to the virtual dam simulations. Thereby obtaining the region C formed. As a result, the change area C becomes an area corresponding to the remaining lattice cells except for the lattice cell where the subtraction result is zero.

The low water quantity calculation unit 60 calculates the water quantity based on the volume and area of the difference area between the area according to the original numerical elevation model and the area corresponding to the third digital elevation model before the depression treatment is performed by the first depression processing part 20 Calculate the low capacity and water storage area of the virtual dam.

The difference region can be obtained by performing a minus operation on the elevation values for the respective lattice cells corresponding to each other of the two numerical elevation models. As a result, the change area and the difference area are the same in that they are obtained through a minus operation on the elevation values of the corresponding grid cells of the two digital elevation models, but the change area is the first numerical elevation Model and the third digital elevation model, the difference area is only the difference between the original digital elevation model and the third digital elevation model.

On the other hand, when the difference area is acquired, it is not necessary to calculate the grid cells of the entire original and the third digital elevation model, and only the grid cells in the change area extracted by the changed area extraction unit 50 need be calculated. This is because the area outside the change area is a difference caused by the processing of the depression irrelevant to the simulation of the virtual dam.

As a result, the difference region is a region in which the altitude values of the grid cells corresponding to each other in the original numerical elevation model and the third numerical elevation model are different from each other in the region corresponding to the position of the change region, , The depression in the change area existing before the simulation of the virtual dam and the depression created after the simulation of the virtual dam are filled with the change of the altitude value.

The storage unit 60 calculates the storage capacity of the virtual dam based on the area and the volume of the difference area obtained through the minus operation of the elevation values of the corresponding lattice cells.

FIG. 4 shows an example of a difference area for explaining the calculation of the saving amount.

The storage capacity includes the storage area and the low capacity, and the area of the low means can be obtained as the sum of the areas of the grid cells in the difference area (R). For example, assuming that one grid cell resolution is 10 m X 10 m, the storage area in the case of FIG. 4 is 400 m 2 (100 m 2 X 4).

The low capacity is calculated as the sum of the volume of the grid cells whose height is the height of the grid cells in the difference region (R). In the case of FIG. 4, the low capacity is 1200 m 3 (200 m 3 + 300 m 3 + 500 m 3 + 200 m 3 ).

On the other hand, when the height of the virtual dam to be simulated is several, if the virtual dam is simulated by applying the maximum value as described above, since the calculated difference area includes the difference area corresponding to the height less than the maximum value, It is possible to calculate the storage capacity of the virtual dam by the height based on the volume and the area of the difference area of the height of each virtual dam corresponding to a part of the difference area according to the maximum height of the virtual dam.

The planning guide unit 50 processes the calculated various information into an information form necessary for the user and sets the height range of the virtual dam to be simulated inputted through the user interface unit 10 , And a virtual dam that is simulated on a map that visualizes the dam construction candidate area in three dimensions through a numerical elevation model, and a water reservoir according to the height of the virtual dam And generates and displays a screen showing a change in scale.

In addition, the plan guide unit 50 can recommend the optimal height of the virtual dam relative to the storage capacity based on predetermined criteria based on the low capacity and the storage area by the height of the virtual dam. Alternatively, an optimal dam construction area may be recommended by comparing the results analyzed for multiple dam construction candidate areas.

As described above, the dam construction planning apparatus 100 according to the present invention calculates the low capacity and the area of the reservoir using the area and the volume of the filled area in order to remove the depression generated due to simulation of the virtual dam, Can be improved.

5 is a flowchart of a dam construction planning method according to the dam construction planning apparatus 100 of FIG. Hereinafter, the organic operation of the dam construction planning apparatus 100 will be described with reference to FIG.

For the simulation through the dam construction planning apparatus 100, it is required to prepare a numerical elevation model for the dam construction candidate area. The digital elevation model may be directly input from the user through the user interface 10 or received from an external server such as a related institution server.

Subsequently, a depressed portion processing step for filling and removing depressions present in the area according to the original digital numerical elevation model is followed (S10). It is noted that the depression process can be performed through various depression elimination algorithms which are well known in the art. Meanwhile, since the first digital elevation model generated by performing the depression process on the original digital elevation model and the original digital elevation model from the user may be input together, step S10 may be omitted in some cases.

Fig. 6 shows the terrain (T1) according to the original digital elevation model and the terrain (T2) according to the first digital elevation model. For the sake of reference, the portion indicated by the dotted line represents the topography (T1) according to the original digital elevation model and the portion shown by the solid line represents the topography (T2) according to the first digital elevation model. Parts are indicated by solid lines.

Referring to FIG. 6, three depressions (Sink1, Sink2, Sink3) existing in the terrain (T1) are filled in the terrain (T2).

When the depression process is completed as described above, the position of the virtual dam is set (S20).

7 is an example of a screen showing a location of a virtual dam on a map of a dam construction candidate area. A method of setting the position of the virtual dam will be described with reference to FIG.

The position of the virtual dam D, which is shown linearly as shown in FIG. 7, may be determined through input through the user interface 10. For example, the position of the virtual dam D may be designated from the user linearly, or the user may input the end points at which the virtual dam D is to be placed at points p1 and p2, The positions of the virtual dam D can be set by connecting the points p1 and p2. In addition, considering that the location of the dam should be determined by taking into consideration the surrounding topography and the flow of water, it may be difficult for the user to judge. Therefore, only one point is input from both end points (p1, p2) And the position of another point may be determined according to the flow topography information of the water, so that the linear position of the virtual dam D is determined.

Alternatively, the installation standard of the dam, for example, the dam is typically installed across the valley or the river so as to be perpendicular to the flow of the water, irrespective of the user's input, installed at a point where there is a canyon and the length of the dam body is not long The location of the virtual dam D can be automatically and completely set using the information of the surrounding terrain and the flow of the water based on the criterion,

At this time, information for analyzing the water flow can be provided together with a numerical digital elevation model for easy input and correction of the user's position. In FIG. 7, it can be confirmed that the flow direction 701 of water is indicated by blue color. The water flow information is based on various algorithms and flow direction analysis to calculate the flow direction and slope of each grid constituting the digital elevation model, including the 'D-8' algorithm which utilizes eight flow direction grids And a flow accumulation process of accumulating the contribution drainage area of the river based on the flow vector allocated to each grid cell.

Thereafter, in step S30, the virtual dam is simulated by elevating the altitude of the grid cell corresponding to the position of the virtual dam set by the above-described steps in the first numerical elevation model subjected to the depression processing, by the height of the virtual dam.

At this time, the reason why the altitude value is raised is to obtain the same effect as that of the virtual dam, so that the water flow through the simulated virtual dam should not occur. However, when the elevation value of the grid cell passing through the virtual dam is raised upward and the water flow information is analyzed, a flow passing through the virtual dam may occur. In this regard, the 'D-8' algorithm for analyzing flow information using eight flow direction gratings, for example, assumes that when the elevation value is raised only for the grid cells passing through the virtual dam, the diagonal flow It can be analyzed that the water flows through the virtual dam. In order to prevent such a situation, the altitude of the lattice cells in the vicinity of the linearly set virtual dam, as well as the adjacent grid cells, can be raised together to completely block the flow of water.

Next, through the above-described steps, a depression process is performed to fill the depression with respect to the simulated second digital elevation model (S40). In step S10, depressions are removed by the same method as in the case of the target model in which the depressed portion is processed.

Fig. 8 shows the topography T3 according to the third numerical elevation model in which the depressions after the virtual dam simulation are processed. Referring to FIG. 8, the terrain T3 according to the third digital elevation model includes a sink 4 generated due to simulation of the virtual dam D as compared with the terrain T2 according to the first digital elevation model of FIG. ) Is filled.

Subsequently, the elevation values of the grid cells corresponding to the first numerical elevation model subjected to the first depression process and the third numerical elevation model subjected to the virtual dam simulation post-depression process are minus computed to extract the change area having the altitude value changed (S50). According to Fig. 8, the left area is calculated as the changing area C on the basis of L. Fig.

Subsequently, a minus operation is performed on the elevation values of the grid cells corresponding to the areas of the original numerical elevation model and the third numerical elevation model corresponding to the position of the changed area to extract the difference area (S60). In this way, when extracting the difference region, the range is limited to the grid cells in the change region. At this time, the grid cells corresponding to the position of the change region are extracted from the original numerical elevation model and the third numerical elevation model Or may perform a calculation on the entire grid cell, and then extract the grid cell corresponding to the position of the change area.

9 shows the calculated difference area. Referring to FIG. 9, the R area shown by the hatched area is calculated as a difference area. According to this, the depression (Sink3, part of Sink2) existing before the virtual dam simulation is removed It can be confirmed that the sum of the areas filled in and the areas filled in in step S40 to remove the depression Sink4 after the virtual dam simulation is calculated as the difference area.

The storage area and the low capacity are calculated based on the volume and area of the difference area obtained as described above (S70). The calculated water storage area and low capacity information can be provided to users and utilized to establish the dam construction plan.

In this case, assuming that the total height of the virtual dam is stored, it is possible to calculate the storage capacity based on the maximum water level stored up to the dam floor height. However, it is assumed that the predetermined height is set in the height of the virtual dam, It is of course possible to calculate the storage capacity on the basis of the cross-sectional area and the volume of a partial area of the calculated difference area. For example, the upper limit of water level that can be stored in the non-flood season, the flood level which is the limitation standard when flood control is performed, the flood limit water level to secure the flood control capacity, the low water level which is the lowest water level of the normally available reservoir, Such as water level, which is a high ceiling where the water storage function is lost. Since the difference area according to the highest water level corresponding to the dam floor height includes the difference area according to the water level lower than the highest water level, it is possible to calculate the water level according to various kinds of water level by one operation.

FIG. 10 is an example of a screen on which the calculated low-water-scale information is provided.

10, the area 901 is an area for receiving the original numerical elevation model and the first numerical elevation model together as a user input, and the area 903 is an area for receiving the position coordinates of the both ends of the virtual dam to be simulated Area. In FIG. 10, 780 is the maximum height value, 761 is the minimum height value, and the simulation height interval is 1 in FIG. 10, which is an area where the height range of the simulated virtual dam is inputted.

On the other hand, the area 907 in FIG. 10 is a list area in which the storage area and the low capacity calculated for each height according to the input range are listed and displayed. In addition, it is possible to provide information such as an area, a who, a volume, and the number of grid cells included in the difference area together with height.

FIG. 11 is another example of a screen on which the low-scale information is provided. 11, by visualizing the low capacity and the storage area of the virtual dam at different heights on the three-dimensional map of the dam construction candidate area with different colors, saturation, brightness, and the like, the low capacity and the storage area Can be easily understood by the user. On the other hand, it is also possible to recommend the optimum height of the virtual dam compared to the storage capacity in accordance with a predetermined standard, further from a simple visualization.

As described above, according to the dam construction planning apparatus 100 and method of the present invention, in order to remove the depressions generated through virtual dam simulations in estimating the storage capacity, the storage capacity by height is predicted based on the volume and cross- The prediction accuracy can be improved and the user can effectively guide the construction of the dam construction plan.

The above-described dam construction planning apparatus of the present invention may be implemented as an apparatus having at least one programmable processor coupled to a memory device including at least one type of memory such as RAM, ROM, and the like. The processor may be a general purpose or special purpose processor, and the dam construction planning apparatus and method according to one embodiment of the present invention may be implemented in digital electronic circuitry, or in computer hardware, firmware, software, or a combination thereof. The present invention can also be implemented as a computer program product that when executed on a computer provides a dam construction planning method according to the present invention. Such a computer program product is embodied in a storage medium including machine readable code for execution by a programmable processor. Accordingly, the present invention may be embodied in a machine-readable storage medium including a computer program product that, when executed on a computer, provides instructions for executing a dam construction planning method as described above.

Furthermore, the terms "comprises", "comprising", or "having" described above mean that a component can be implanted unless otherwise specifically stated, But should be construed as including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention.

For example, when the height of a plurality of virtual dams is inputted, a virtual dam is simulated by applying a maximum value among the height values as described above, and a storage capacity according to another height is calculated based on a partial area of the difference area However, the height may be applied to simulate the virtual dam, and the difference area may be separately calculated for each height.

Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

10: user interface unit 20: first depression processing unit
30: virtual dam simulation unit 40: second depression processing unit
50: Change area extracting unit 60:
70: Planning Guide Department

Claims (8)

In the first numerical elevation model in which a depression process for filling a sink in the dam construction candidate area is performed with respect to the original digital elevation model (DEM) for the dam construction candidate area, it corresponds to the position of the virtual dam Generating a second numerical elevation model in which the virtual dam is simulated by elevating the altitude value of the grid cell by the height of the virtual dam;
Creating a third digital elevation model in which the depression process is performed to fill the depression with respect to the second digital elevation model;
Comparing the first digital elevation model with the third digital elevation model to extract a change area changed due to the virtual dam; And
The low capacity and the storage area of the virtual dam are calculated based on the volume and area of the difference area in which the altitude values of the grid numerical elevation models of the original digital numerical elevation model and the third digital elevation model corresponding to the position of the change area differ from each other And calculating the dam construction plan.
The method according to claim 1,
The step of calculating the low capacity and the water storage area of the virtual dam may include:
The area of the grid cells in the difference area is calculated as the water storage area.
The method according to claim 1,
The step of calculating the low capacity and the water storage area of the virtual dam may include:
Calculating a difference between elevation values for each of the lattice cells corresponding to the original numerical elevation model and the third numerical elevation model and calculating the sum of the volumes of the lattice cells having the elevation difference as a height as the low capacity A dam construction planning method.
The method according to claim 1,
And recommending the height of the virtual dam on the basis of the calculated low capacity and the area of water storage.
The method according to claim 1,
Further comprising providing on a map of the dam construction candidate area a screen showing the change in the low capacity and the water storage area according to the height of the virtual dam through a user interface unit.
A computer-executable recording medium on which a program for executing a dam construction planning method according to any one of claims 1 to 5 is recorded.
The elevation value of the grid cell corresponding to the position of the virtual dam in the first numerical elevation model in which the depression process for filling the depression in the dam construction candidate area is performed with respect to the original numerical elevation model for the dam construction candidate area, A virtual dam simulation unit for generating a second digital elevation model in which the virtual dam is simulated upward by a predetermined height;
A concavity processing unit for generating a third digital elevation model by performing a concavity processing for filling the concavity with respect to the second digital elevation model;
A change area extracting unit for comparing the first digital elevation model with the third digital elevation model to extract a change area changed due to the virtual dam; And
The low capacity and the storage area of the virtual dam are calculated based on the volume and area of the difference area in which the altitude values of the grid numerical elevation models of the original digital numerical elevation model and the third digital elevation model corresponding to the position of the change area differ from each other A dam construction planning apparatus including a low-water-volume calculation unit for calculating a low-
8. The method of claim 7,
The virtual dam simulation unit simulates the virtual dam by elevating an altitude value of the grid cell based on a maximum value among a plurality of predetermined height values of the virtual dam,
Wherein the low water quantity calculation unit calculates the low capacity and the water storage area of the virtual dam by the height based on the volume and the area of the partial area of the difference area corresponding to the maximum height value of the virtual dam.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020034705A (en) * 2018-08-29 2020-03-05 株式会社パスコ Check dam planning support apparatus and control program
KR20200069848A (en) * 2018-12-07 2020-06-17 (주)헤르메시스 Method for computing watershed boundary based on digital elevation model, apparatus, and recording medium thereof
KR20200082611A (en) 2018-12-31 2020-07-08 한국전자통신연구원 System for authoring 3d virtual environment using digital elevation model and operating method thereof
CN117131810A (en) * 2023-10-26 2023-11-28 长沙市规划勘测设计研究院 Rain and flood regulation and storage simulation system and method based on system dynamics

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020034705A (en) * 2018-08-29 2020-03-05 株式会社パスコ Check dam planning support apparatus and control program
KR20200069848A (en) * 2018-12-07 2020-06-17 (주)헤르메시스 Method for computing watershed boundary based on digital elevation model, apparatus, and recording medium thereof
KR20200082611A (en) 2018-12-31 2020-07-08 한국전자통신연구원 System for authoring 3d virtual environment using digital elevation model and operating method thereof
CN117131810A (en) * 2023-10-26 2023-11-28 长沙市规划勘测设计研究院 Rain and flood regulation and storage simulation system and method based on system dynamics
CN117131810B (en) * 2023-10-26 2024-01-26 长沙市规划勘测设计研究院 Rain and flood regulation and storage simulation system and method based on system dynamics

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