KR101816184B1 - System and method for tracking flooded area, and recording medium havig computer readable program for executing the method - Google Patents

Abstract

The flooded area tracking system includes an inflow flow information obtaining unit, a neighboring cell water level determining unit, a flow rate determining unit, and a flow output unit. The inflow flow information obtaining unit obtains the preset flow rate information for the predetermined time period flowing into the submerged cell, and the adjacent cell water level determining unit determines a cell having a lower water level than the submergence cell among the adjacent cells of the submerged cell. When the flow rate of the incoming flood corresponds to a predetermined transition range, the flow outlet flows out the flow rate into the submerged cell to a lower level than the submerged cell. According to this configuration, it is possible to simulate the flood-spreading path of the urban (urban) flood due to the flood flooding with only the simple hydrological data of topographic map (DEM or DSM) and inflow flood, It is possible to predict the immersion-diffusion path quickly and accurately.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a flooded area tracking system, a method, and a computer-readable recording medium storing the computer readable program for executing the method. BACKGROUND OF THE INVENTION [0001]

Field of the Invention The present invention relates to a prediction system and method for the civil engineering construction field, and more particularly, to a system and method for flooding tracking in a flood flood season.

Recent droughts and floods from climate change have increased global water disasters, and areas currently suffering from droughts are also increasingly susceptible to flood damage. In addition, recent studies have shown that extreme precipitation increases as the climate changes, and the frequency of extreme precipitation and droughts increases.

However, the current drainage infrastructure design is based on the stationarity assumption, and it is designed to be difficult to reflect extreme climatic conditions, and the frequency of extreme precipitation is also increasing. The possibility of flood damage in urban areas is increasing. Especially, in flood flooding, the flood level is rapidly increased in urban rivers where the time to reach the urban area is short, and the risk of damage to the river facilities such as roads and bridges, and buildings and buildings is greater.

In this way, flooding due to flood flooding occurs within a few hours, but currently models for interpreting it do not accurately predict the flooding range, or because the time required for prediction is long, There is a limit to establishing a plan.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a system and method for quickly and accurately predicting a flooding-diffusion path of a flood (urban area) due to flood flooding .

In order to achieve the above object, a flooded area tracking system according to the present invention is a system for tracking a flooded path for an area that can be partitioned into a plurality of adjacent cells, comprising: an inflow flow rate information obtaining unit; A transition determining unit, and a flow outlet.

The inflow flow information obtaining unit obtains the preset flow rate information for the predetermined time period flowing into the submerged cell, and the adjacent cell water level determining unit determines a cell having a lower water level than the submergence cell among the adjacent cells of the submerged cell. When the flow rate of the incoming flood corresponds to a predetermined transition range, the flow outlet flows out the flow rate into the submerged cell to a lower level than the submerged cell.

According to this configuration, it is possible to simulate the flood-spreading path of the urban (urban) flood due to the flood flooding with only the simple hydrological data of topographic map (DEM or DSM) and inflow flood, It is possible to predict the immersion-diffusion path quickly and accurately.

The water level controller may further include a water level controller for adjusting the water level of the submerged cell in response to the flow rate of the water when the cell has a lower water level than the submerged cell, The water level of the submerged cell can be adjusted corresponding to the flow rate of the water. At this time, the predetermined transition range may be a range in which the flow velocity is larger than a value obtained by dividing the size of the immersion cell by a predetermined period.

Further, it may further include a level data storage unit for storing level data of the immersion cells in the area. According to such a configuration, it is possible to significantly reduce the amount of data to be stored or transmitted when providing immersion tracking information for an area.

In addition, when there are a plurality of adjacent cells having a water level lower than that of the submerged cells, the flow outlet portion can flow out to each adjacent cell by dividing the flow rate flowing into the submerged cells at a preset ratio according to the water level difference with the submerged cells. According to such a configuration, it is possible to simulate the submergence state closer to the actual situation by reflecting the water level difference between the cells.

Also disclosed is an invention in which the system is implemented in the form of a method and a medium on which a computer-readable program for executing the method is recorded.

According to the present invention, it is possible to simulate the flood-spreading pathway of the urban (urban) flood caused by the flood flooding only by the simple hydrological data of the topographic map (DEM or DSM) and the inflow flood amount, - The diffusion path can be predicted quickly and accurately.

In addition, the amount of stored or transmitted data can be significantly reduced when flood trace information is provided for the area.

In addition, it is possible to simulate the submergence situation closer to the actual situation by reflecting the difference in the water level between cells and the flow rate.

1 is a schematic block diagram of a flooded area tracking system in accordance with an embodiment of the present invention;
2 is a schematic diagram illustrating flow distribution among cells using a multiple flow direction method;
FIGS. 3 to 5 are schematic views for explaining flow diffusion between cells using the assumption of normal. FIG.
FIG. 6 is a schematic flow chart for performing a flooded area tracking method according to an embodiment of the present invention; FIG.
Figure 7 is an example of terrain data of a numerical surface model.
Figure 8 is an input screen provided by the flooded area tracking system of Figure 1;
FIG. 9 is a graph comparing the estimated flooding areas according to different flooding area estimation methods.
FIG. 10 is a view showing the flooding area by the time of immersion area by the LEIM method; FIG.
11 is a view showing a change in flooded area with time according to a flooding area estimation method;

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

1 is a schematic block diagram of a flooded area tracking system according to an embodiment of the present invention. 1, the flooded area tracking system 100 includes an inflow flow information obtaining unit 110, a neighboring cell water level determining unit 120, a flow rate transfer determining unit 130, a flow outlet 140, 150, and a flooded cell level data storage unit 160.

In FIG. 1, each component of the flooded area tracking system 100 may be implemented only by hardware, but it may be more general to be implemented by software that operates on hardware.

The inflow flow rate information obtaining unit 110 obtains the flow rate information per predetermined period flowing into the submerged cells.

The flooded area tracking system 100 is a system for tracking a flood path for an area partitioned into a plurality of adjacent cells, and the generated flood flood flow rate can be generated in any cell over time.

The total amount of flow at a specific time interval from this root start cell is transferred to an adjacent cell, and the setting of the root start cell or the inflow flow rate by time interval to the root start cell can be performed by the information input by the user, The inflow flow rate in the cell using the information calculated by the flooded area tracking system 100 is used.

The adjacent cell level determining unit 120 determines a cell having a lower water level than the immersion cell among the adjacent cells of the submerged cell. If the adjacent cell is not a flooded cell, the altitude of the surface of the ground or the altitude of the ground structure is used according to the preset number.

The flow rate transition determining unit 130 compares the flow rate of the flood water flowing into the submerged cell with a predetermined transition range. At this time, the predetermined transition range may be a range in which the flow velocity is larger than a value obtained by dividing the size of the immersion cell by a predetermined period.

For example, when the flow velocity is 10 m / s and the flooded cells into which floods flow are 5 m in length and 5 m in length, the flow rate transition determining unit 130 can determine that the flow velocity corresponds to the transition range.

Also, the flow rate at this time can be calculated by the flow rate flowing in and the water level difference between the cells. According to such a configuration, it is possible to carry out immersion tracking closer to the actual situation by reflecting the water level difference and the flow velocity.

When the flow rate of the incoming flood falls within a predetermined transition range, the flow rate outflow portion 140 flows the flow rate into the submerged cell to a lower cell than the submerged cell.

At this time, when there are a plurality of adjacent cells having a water level lower than that of the submerged cells, the flow outlet 140 may divide the flow rate into the submerged cells at a predetermined ratio according to the water level difference with the submerged cells,

More specifically, when a flood-flood flow generated through a flood scenario determines the root cell from which the flood begins, the flood begins. When the flood starts, the total amount of flood generated is assigned to the adjacent cells, and the flow direction due to the flood flooding may appear in various directions depending on the slope.

Therefore, an efficient method of allocating cells with lower altitude than the root cell is needed. In the present invention, as a method of allocating the flood total amount to the adjacent cells lower than the root cell, a method of assigning the altitude difference of each adjacent cell to a weight is used.

In other words, the flood total amount is allocated to the adjacent cell by dividing the lowest altitude difference by 1 and the lower altitude difference by the ratio of the lowest altitude difference. This distributed flood volume continues until the altitude of the adjacent cell reaches the lowest elevation and is higher than the root cell. 2 is a schematic diagram illustrating flow distribution between cells using a multiple flow direction method; FIG. 2 shows a method of performing a differential distribution using a slope with respect to a main cell in order to perform a flood in the grid-structured cell structure.

The water level control unit 150 adjusts the level of the submerged cells in accordance with the flow rate of the submerged cells when there is no cell having a lower level than the submerged cells. More specifically, when the flood flow reaches the minimum altitude, the cell becomes the root start cell and the flood total accumulates in the root start cell.

FIGS. 3 to 5 are schematic views for explaining flow diffusion between cells using the assumption of normal. FIG. FIGS. 3 to 5 show an inter-cell flow rate transfer method using the assumption that the water level in the low-altitude cell is higher than that in the adjacent cell, and that the water level is equalized with the adjacent cells.

First, in FIG. 3, the water level of the cell Z1 increases until the water diffusion condition [Z1 + h1> Z2] is satisfied. As shown in FIG. 4, when the total flood amount is added, the water level must be increased to satisfy the assumption of an average [Z1 + h1 = Z2 + h2], and with such a mechanism, .

In addition, the water level control unit 150 can adjust the water level of the submerged cell according to the flow rate of the flood water when the flow rate of the flood does not correspond to the predetermined transition range, even if there is an adjacent cell having a lower water level than the submerged cell.

The immersion cell level data storage unit 160 stores the level data of immersion cells. Generally, the prediction information of the flooded area is provided together with the topographic information of the simulated area. The larger the simulation area and the more detailed the terrain information, the larger the amount of the terrain information, and the amount of data provided for storage or follow- .

The immersion cell level data storage unit 160 may store only the level data for the immersed cells rather than the entire simulation region. In this case, the amount of data required for storing and transmitting can be significantly reduced.

Hereinafter, the present invention will be described in more detail with reference to specific examples.

6 is a schematic flow chart for performing a flooded area tracking method according to an embodiment of the present invention.

6, the flooded area tracking system receives essential data set for flooded area tracking (S110), and performs a basic system initialization operation (S120). At this time, two input data can be inputted as required data, ie, influent flood amount and topographic data (DEM or DSM).

The input flood amount may be virtual data input by a user or the like, past actual data or prediction data using the data. In addition, the incoming flood volume may be input to change over time, or may be calculated to change over time in the flooded area tracking system.

The Digital Elevation Model (DEM) is used for the topographic data basically, but the digital surface model (Digital Surface Model) is applied to the elevation values of the facilities to simulate the flood - DSM) can be used. Figure 7 is an example of terrain data of a numerical surface model.

8 is an input screen provided by the flooded area tracking system of FIG. On the first line of the screen, you can read DEM or DSM files in ASCII format (American Standard Code for Information Interchange). If you use function 2, you can input the coordinate value of the screen into the root cell where the flood flow starts, or you can set the desired start cell using the mouse. If you use function 3, you can recall the total amount of flow by time in the flow file in Excel or text format.

In addition, No. 4 is used to input the moving distance per minute by the flow rate value and uses the average flow rate per hour at the banking collapse point. After inputting the data and selecting the analysis function 5 times, the model is activated. The result of the model is that when the output button is pressed by the 6th time zone, the flood - diffusion range is outputted in the time zone as in 7th. Also, the output data can be saved as an ASCII file by time zone and can be confirmed by using GIS tool.

Subsequently, a flow rate transfer process is performed for all the cells including the flow rate (S130). To do this, each cell first acquires inflow flow data by time slot (S132), and determines whether there is an area (including a water level) lower than the current location (S134). If there is no lower area, the flow rate is stored to increase the water level (S134). If there is a lower area, it is determined whether the flow rate can be suppressed to the next cell (S135). If it is determined that the flow rate can be entered into the next cell, the flow rate is transferred to the next cell to enter the next cell (S136). If the flow rate can not be entered, the flow rate is increased to increase the water level (S134).

If the set total tracking time has not been completed, the monitoring execution time is increased (S160). If the set time has not been reached, The entire tracking process is terminated when the set total tracking time is ended.

In order to analyze the suitability of the present invention, the method applied in the present invention and the prediction result of the method used to calculate the approximate flood range have been compared and analyzed.

The method 1 is a method of confirming the flooding path over time as a method of the present invention, and the method 2 is a method in which a floodgate (m ³ ) flowing in time with the inflow flood amount lowest altitude integration method is sequentially It is a method of integrating. This method is applied to the method of summation of floods.

Method 3 is a method mainly used when creating a flood hazard map by the extension of the overflow. It is a method of estimating flooded area by extending the flood elevation entering from the flood level. The results of these three methods are as shown in Fig.

FIG. 9 is a graph comparing the estimated flooded area with time according to different flooding area estimation methods. In FIG. 9, it can be seen that the method according to the present invention increases the flooding area with time relatively linearly. However, the flooding area increased significantly between 14 and 15 hours when the influent flood amount was integrated from the lowest elevation (LEIM).

This is shown more clearly in FIG. 10 because the LEIM method accumulates sequentially from low elevation values, so that the flooded area instantaneously increases when flooding occurs in the region where the elevation of the largest region is 20.1 m (El.) . Fig. 10 is a view showing flooding area by time of an immersion area by the LEIM method.

FIG. 11 is a view showing a change in the flooded area with time according to the flooding area estimation method. FIG. As can be seen in FIG. 11, all of the three methods described above can show the change in flood area over time, but the LEIM method has a discontinuity over time, and the FLEM method has a drawback that the damage area is overestimated. However, the results of the SIMOD (Simplified Inundation Model) model according to the present invention show the succession of flood path and flood area results over time.

In the present invention, SIMOD (Simplified Inundation Model), which is a simplified flood flood model, is provided to track the flood inundation path due to the river bank collapse. We used the Multi Direction method to create the flood path and the Flat-Water Assumption method to accumulate the flood at the lowest altitude. As a result, it was confirmed that the flood was spread continuously from the point where the flood was introduced to the time.

In addition, since the present invention can be model driven by inflow amount and topography data, simulation time can be remarkably shortened according to the present invention. In addition, if the flood volume can be grasped only through the rainfall-runoff model or the levee collapse model, it can be used to establish the evacuation plan such as the EAP (Emergency Action Plan) because the result can be predicted within a few minutes.

Although the present invention has been described in terms of some preferred embodiments, the scope of the present invention should not be limited thereby but should be limited to the variations and improvements of the above-described embodiments supported by the claims.

100: flood area tracking system
110: Inflow flow rate information obtaining unit
120: adjacent cell level judging unit
130:
140: flow outlet
150:
160: flooded cell level data storage unit

Claims (13)

A system for tracking an immersion path for an area that can be partitioned into a plurality of adjacent cells,
An inflow flow rate information acquisition unit for acquiring flow rate information of a predetermined period flowing into the immersion cell;
A neighboring cell level determining unit for determining a cell having a level lower than that of the submerged cell among adjacent cells of the submerged cell;
A flow rate transition determining unit for comparing the flow rate of the flood water flowing into the immersion cell with a predetermined transition range; And
And a flow outlet for discharging the entire flow rate to the submerged cell to a cell having a lower level than the submerged cell when the flow rate of the incoming flood corresponds to a predetermined transition range,
And controls the water level of the submerged cell in accordance with the flow rate of the inflowing water if the cell having a lower water level than the submerged cell is not present and if the flow rate of the flood cell does not fall within the preset transition range, Further comprising a water level adjusting unit for adjusting a water level of the immersion cell,
Wherein when the adjacent cell is not a flooded cell, the level of the adjacent cell is an elevation of the ground surface or the ground structure of the adjacent cell set in advance.
delete delete The method according to claim 1,
And a flooded cell level data storage unit for storing the level data of the flooded cells in the area.
5. The apparatus of claim 4, wherein the flow outlet
When there are a plurality of adjacent cells having a lower water level than the immersion cell,
Dividing the flow rate into the submerged cells at a predetermined ratio in accordance with a difference in level between the submerged cells and flowing out to each adjacent cell.
The method of claim 5,
Wherein the predetermined transition range is a range in which the flow velocity is larger than a value obtained by dividing the size of the immersion cell by the predetermined period.
There is provided a method for tracking a flood route for an area that can be partitioned into a plurality of adjacent cells by a flood area tracking system including an inflow flow information acquiring unit, an adjacent cell water level determining unit, a flow rate transfer determining unit,
Obtaining the inflow flow rate information acquiring unit flow rate information for a predetermined period flowing into the flooding cell;
The adjacent cell level determination unit may determine a cell having a lower level than the immersion cell among adjacent cells of the immersion cell;
Comparing the flow rate of the flood entering the immersion cell with a predetermined transition range; And
And a flow outflow step of flowing out all of the flow amount flowing into the submerged cell to a cell whose level is lower than that of the submerged cell when the flow outflow section has a flow rate of the incoming flood within a predetermined transition range,
Wherein the water level adjustment unit further includes a water level control unit for adjusting the water level of the immersion cell corresponding to all of the inflow water flow rate when there is no cell having a lower water level than the immersion water cell, And adjusting the water level of the immersion cell corresponding to all of the inflowing flow amount,
Wherein when the adjacent cell is not a flooded cell, the level of the adjacent cell is an altitude of a ground surface or a ground structure of the adjacent cell set in advance.
delete delete The method of claim 7,
Wherein the flooded cell level data storage unit further included in the flooded area tracking system further comprises storing the level data of immersed cells in the area.
11. The method of claim 10,
When there are a plurality of cells having a lower water level than the submerged cells,
Dividing the flow rate into the submerged cells according to a difference in the water level between the submerged cells and flowing out into the adjacent cells.
The method of claim 11,
Wherein the predetermined transition range is a range in which the flow velocity is larger than a value obtained by dividing the size of the immersion cell by the predetermined period.
A recording medium on which a computer-readable program for executing the method according to any one of claims 7 and 10 to 12 is recorded.

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