KR101102436B1 - System and method for modeling river hydraulic and water quality based on location - Google Patents

Abstract

PURPOSE: A water quality modeling and stream treatment system based on a geographical information system is provided to easily create the input material of a water quality model using the database of the geographical information system. CONSTITUTION: A database(221) stores stream information, water quality information, and geographical information. A stream and water quality modeling apparatus(220) automatically separates the simulation section of a stream into reaches and elements through the geographical information, water quality information, and the stream information. The stream and water quality modeling apparatus creates a stream and water quality model input material file by receiving the reach and element information from the stream and water quality information.

Description

System and method for modeling river hydraulic and water quality based on location}

The present invention relates to a river repair and water quality analysis method, and more specifically, to generate the Reach (Rach) and elements of the stream to be analyzed automatically using the Geographic Information System (GIS), Geographic information system-based river repair and water quality modeling system and method that analyzes repair and water quality on the basis of generated rich and element, and maps the analyzed repair information and water quality to geographic information so that the results can be checked at a glance. It is about.

In general, hydraulics is the field of water engineering, mainly civil engineering. In addition to the theory of water suspension and basic movement, the water pressure of dams, flooding of rivers, scouring of riverbeds, flow of drain pipes, pumping of wells, sedimentation of sewage, It covers a wide range of applications, including treatments, tsunamis at seaports, shoreline markings and hydraulic pressure in hydraulic pipes. Therefore, hydraulics is used as a design standard for various structures in rivers, topologies, coasts, and hydraulic engineering.

As such, the repair and water quality of each river must be modeled and analyzed for use as design criteria for various structures.

Hydraulic information for the use of hydraulic and water quality models includes flow rate, level, flow rate, and hydraulic coefficients. To generate this information, mathematical simulations based on river cross-section data and regression analysis of simulation results are required.

In general, the QUAL2E model is mainly used as a model for hydraulic and water quality modeling. The QUAL2E model makes the QUAL-II model developed by adding predicted water quality items to the QUAL-Ⅰ model developed by the US EPA, which can be used on a PC, and is the most widely used model for simulating river water quality. . The QUAL2E model includes dissolved oxygen (DO), biochemical oxygen demand (BOD), water temperature (Temp), algae as chlorophyll (Chl-a), organic nitrogen (Org-N), ammonia nitrogen (NH3-N), nitrous acid It is possible to simulate 15 kinds of water quality items such as nitrogen, nitrate nitrogen, organic phosphorus, dissolved phosphorus, E. coli, any non-conservative substance, and conservative substances I, II and III.

For such repair and water quality modeling, it is essential to distinguish the same hydraulic characteristic section, Reach, and to distinguish the reach, river hydraulic analysis should be performed. shall. In order to distinguish the rich, the repair and water quality analysis expert should use the information stored in the database or directly input the data to divide the rich and the elements. Therefore, there has been a problem that it takes a lot of effort and cost to model the water quality.

Due to this problem, it is easy to build a repair and water quality model and to build a water quality through a system that can automatically generate input data of repair and water quality models such as reach and element using a database of water quality and water quality data in the standardized watershed. It is necessary to lay the foundation for analysis and to improve the efficiency of hydraulic and water quality model application for total water pollution management.

Accordingly, an object of the present invention is to construct a database that integrates graphic data and attribute data based on various basic maps, administrative districts, and pollutant sources for the construction of river water quality and water quality models, and through calculation based on Geographic Information System (GIS). Automatically generate input data for hydraulic and water quality models to reduce the time and cost required to build hydraulic and water quality models, and to ensure consistency of water quality prediction results through standardized procedures and methods, to ensure consistent and reliable change in the watershed's situation. The present invention provides a geographic information system-based river repair and water quality modeling system and method that can provide predicted water quality.

Geographic information system based river repair and water quality modeling system of the present invention for achieving the above object; Automatically partitions the repair and water quality information, the database storing the geographic information, and the simulation section of the river for performing repair and water quality modeling using the repair and water quality information and geographic information, and the rich and element, And a repair and water quality modeling device for generating a repair and water quality model input data file required by the repair and water quality model analysis module from the repair and water quality information and the rich and element information.

The repair and water quality modeling device includes a river analysis module for generating a result information of analyzing a hydraulic characteristic of a river based on a geographic shape of the river, and a richness along a river centerline using the repair and water quality information of the simulation section of the stream. And a generation module for generating an element, and a repair and water quality model input file required by the repair and water quality model analysis module for performing the repair and water quality modeling of the generated rich and element and the repair and water quality information. It characterized in that it comprises a main module for storing in the database.

And an output module for mapping the generated rich and element and the repair and water quality model analysis module to geographic information by mapping the rich, element, repair and water quality modeling information performed by the generated repair and water quality model input data file. It is characterized by including.

The output module may further provide the user with graphic information capable of graphically mapping the information with the geographic information to which the rich, element, hydraulic and water quality modeling information is mapped.

The rich generation module compares the stream analysis result information with a flow rate and a flow rate, and searches for candidate sections that are hydraulically equalized sections along the stream center line, and generates a rich split point based on the equalized sections. And generating and storing the rich by connecting the rich split points, and receiving the flow coefficient and the roughness coefficient data for each of the generated rich and mapping the data to the corresponding rich.

The rich generation module automatically sets the rich split point, but extracts a point in which the flow rate of the previous point and the flow rate of the subsequent point is greater than a preset value through the search of the HEC-RAS result, and divides the corresponding point. It is characterized by setting as a candidate group.

The set value is characterized in that the standard deviation of the displacement values of the point where the difference in the flow rate calculated by the following equation (2) occurs.

[Equation 2]

And a web server receiving the graphic information and the geographic information from the output module and providing the graphic information to the user through a web page.

Geographic information system based river repair and water quality modeling method of the present invention for achieving the above object; In the geographic information system-based river repair and water quality modeling method, the river analysis module sets a simulation section of a river, which is a section to be repaired and simulated, and obtains a numerical elevation model including geographic information on the curves of the river surface. The analysis environment setting process and the rich splitting module generate a rich splitting point along a river centerline based on the repair and water quality information of the river simulation section, and connect the rich splitting points to generate a rich equivalent section. An element generation process for generating an element that is divided at equal intervals for each of the generated riches, and a main module for assigning spatial and environmental information to each of the generated elements The attribute definition process, and the main module, the stream from the repair and water quality information and rich and element information Create the logical and water quality model for repairing and water quality model input data file to run the model and comprises the repair and water quality model linking the process of saving the database.

The analysis environment setting process may include setting an environment setting step for setting a spatial figure layer, inputting a target area of a water quality wool receiving a target area of a water quality hair for setting the simulation section, and receiving the input water quality simulation target area. And obtaining a digital elevation model for obtaining simulation information including the digital elevation model for the digital elevation model.

The rich generation process includes: a step of searching for a equalization section candidate for searching for a hydraulic equalization section candidate by comparing stream analysis result information with a flow rate and a flow rate, and generating rich split points based on the hydraulic equalization section. Thereafter, a rich generation step of generating and storing the rich by the rich splitting points, and the rich property information setting step of setting the rich river property information for each of the generated riches.

In the rich generating step, the rich splitting points are automatically set, and the rich splitting is performed by extracting a point where the flow rate of the previous point and the flow rate of the subsequent point are greater than the preset value through the search of the HEC-RAS result. It is characterized by being set as a candidate group.

The set value is characterized in that the standard deviation of the displacement values of the point where the difference in the flow rate calculated by the following equation (3) occurs.

&Quot; (3) "

The rich river characteristic information may include at least one of a flow coefficient and a roughness coefficient.

The element generation process may include an element generation step of automatically dividing an element at equal intervals specified by the generated riches, and an attribute setting step of grasping the number of elements for each rich and organically connecting and storing the information of the maps. Characterized in that.

The hydraulic and water quality model linkage process includes an information extraction step of extracting input data file configuration data for driving a hydraulic and water quality model model, and converting the extracted input data file configuration data into a format required by the hydraulic and water quality model. And an input data file generation step of generating a hydraulic and water quality model model input data file.

The method; The method may further include a simulation result generation process of generating and storing simulation result information of the repair and water quality models by performing repair and water quality modeling by loading the generated repair and water quality model input data file which is executed externally.

The method comprising: The method may further include an information providing process of mapping the simulation result information of the generated hydraulic and water quality models to geographic information to display at least one of a text, a table, and a graph.

The present invention utilizes a geographic information system-based modeling system for constructing hydraulic and water quality models, and a database for repair and water quality data using standardized stream watershed and water quality data through spatial and non-spatial database design and construction technology. Easily generate input data and view simulation results through a graphical user interface (GUI), making it easy to build repair and water quality models and analyze water quality even if you are not a database and modeling expert.

In addition, the present invention has the effect of reducing the time and cost required to build the repair and water quality model by automatically generating the input data of the repair and water quality model through a calculation based on the Geographic Information System (GIS).

In addition, the present invention has the effect of ensuring the consistency of the water quality prediction results through standardized procedures and methods to provide a consistent and reliable water quality prediction results for changes in the river basin.

The present invention can extract the input data required for driving the QUAL2E model based on the GIS for the water quality simulation through QUAL2E, and automatically generate the input data file to perform the model and automatically display the results. This prevents errors in the complex data construction process in which various input data are converted to the input data format, and has an effect of drastically shortening the time required to generate an input data file that requires inputting a corresponding value at an exact text position. .

1 is a view showing the configuration of the entire system to which the geographic information system-based river repair and water quality modeling system according to the present invention is applied.
2 is a view showing the configuration of the repair and water quality modeling device of the geographic information system-based river repair and water quality modeling system according to the present invention.
3 is a flowchart illustrating a method for modeling river repair and water quality based on a geographic information system according to the present invention.
4 is a flowchart illustrating a rich generation method of the repair and water quality modeling method according to the present invention.
5 is a view for explaining the process of setting the rich generated according to the present invention.
6 is a diagram illustrating a HEC-RAS result file and contents according to the present invention.
FIG. 7 is a diagram illustrating a split point search screen for setting a equalization section according to an embodiment of the present invention. FIG.
8 is a view showing a flow coefficient input screen according to an embodiment of the present invention.
9 is a diagram illustrating a map screen applied to geographic information after rich division is completed according to an embodiment of the present invention.
10 is a flow chart showing a river simulation section and element automatic splitting method of the repair and water quality modeling method according to the present invention.
11 is a diagram illustrating a detailed configuration of an element dividing module according to the present invention.
12 is a diagram illustrating a map screen in which element division is completed and reflected in geographic information according to an embodiment of the present invention.
13 is a diagram illustrating an element information setting screen according to an embodiment of the present invention.
14 is a view showing the procedure of the repair and water quality model input data generation method of the repair and water quality modeling method according to the present invention.
15 is a view showing the configuration of a main module for generating QUAL2E model input data according to the present invention.
16 illustrates a screen for setting a Qual2E input data file according to an embodiment of the present invention.
17 is a view showing a hydraulic and water quality model input data file created in a text format according to an embodiment of the present invention.
18 is a view showing the simulation results of the repair and water quality model of the display module according to an embodiment of the present invention.
19 is a view showing a repair and water quality model result file created in a text format according to an embodiment of the present invention.
20 is a section separation diagram for converting an actual stream into data in a form that can be used in a repair and water quality model according to an embodiment of the present invention.

Hereinafter, a geographic information system-based river repair and water quality modeling system and method will be described with reference to the accompanying drawings.

1 is a diagram showing an overall system configuration including a geographic information system-based river repair and water quality modeling system according to the present invention.

The geographic information system-based river repair and water quality management system according to the present invention includes a user terminal 101, a plurality of water quality measurement device 110 and the repair and water quality modeling system 200.

The water quality measuring device 110 is installed in various watersheds of the river, obtains various water quality information, and provides the repair and water quality modeling system 200 through the wired / wireless data communication network 120.

The user terminal 101 is a terminal such as a personal computer, a laptop, a PDA, a UMPC, a tablet PC, a smartphone used by a user such as an administrator, a person in charge, an expert, a decision maker, and a general person. The repair and water quality modeling system 200 is provided through the data communication network 120.

The wired / wireless data communication network 120 is a network capable of transmitting and receiving data such as wired / wireless internet network, 3G network, HSDPA, LTE network, etc. The user terminal 101, the water quality measuring device 110, and the repair and water quality modeling system 200 ) Allow both to send and receive data to and from each other. As described above, the water quality information may be measured by the water quality measuring devices 110 to be provided to the repair and water quality modeling system 200 through the wired / wireless data communication network 120, but the user may measure the water quality through the water quality measuring device. The various water quality information may be directly input to the repair and water quality modeling system 200. The water quality information includes flow rate, water level, flow rate, hydraulic coefficient, dissolved oxygen (DO), biochemical oxygen demand (BOD), water temperature, algae as chlorophyll (Chl-a), organic nitrogen (Org-N), ammonia nitrogen ( NH3-N), nitrite nitrogen, nitrate nitrogen, organic phosphorus, dissolved phosphorus, and the like.

The repair and water quality modeling system 200 is connected to the wired / wireless data communication network 120 and the local data communication network 210 through the local data communication network 210 or directly to the wired / wireless data communication network 120 to measure the water quality measurement apparatus ( 110 and through the user terminal 101 to obtain and manage the repair and water quality information, the rich and element automatic partition generation for map-based repair and water quality management and display the repair and water quality information for each of the automatically divided rich and elements Hydraulic and water quality modeling device 220 for controlling the overall operation for the; and the database for storing the collected hydraulic and water quality information, figure data and attribute data and GIS information. In addition, the web server 230 and the web database linked with the repair and water quality modeling device 220 so that a general user can easily access various information regarding repair and water quality of the river by accessing the wired / wireless data communication network 120 ( 231 may be further included. Configuration and operation of the repair and water quality monitoring device 220 will be described in detail with reference to FIG.

2 is a view showing the configuration of the repair and water quality modeling device of the geographic information system-based river repair and water quality modeling system according to the present invention.

Referring to FIG. 2, the repair and water quality modeling device 220 includes a main module 310, a river analysis (HEC-RAS) module 320, an input module 340, a rich generating module 360, and element generation. The generation module 350 including the module 370 and the output module 380.

The HEC-RAS (Hydrologic Engineering Center-River Analysis System) module 320 acquires, stores and manages simulation information on the curves of river water surface, and uses a digital elevation model (DEM: Digital) based on geographic information. Evaluation Model) is generated, and stream analysis (HEC-RAS) result information is generated and stored in the database 221. The HEC-RAS result information includes the flow rate, flow rate, level, and length of each point in the stream.If the rich separation point is selected by the displacement of the flow rate, flow rate, and level for each point, the split point is set at the point corresponding to the length. do.

The input module 380 receives various input information input by a user such as an administrator, a person in charge, an expert, a decision maker, and the like through a computer connected through a keyboard and a local network 210 and / or a wired or wireless data communication network 120. Provided at 310.

The output module 380 provides and displays various information to the computer of the user connected through the local network 210 and / or the wired / wireless data communication network 120 or displays various information on display devices such as LCD and CRT. In addition, when the web server 230 is configured, the output module 380 may display various information generated by the repair and water quality modeling device 220, for example, rich, element, repair, and water quality modeling information. 230, the web server 230 may be provided to the user terminals 101 through a web page.

The main module 310 controls the overall operation of the repair and water quality modeling device 220. The main module 310 loads river analysis (HEC-RAS) results and displays the river analysis results on display devices or user terminals 101 directly connected through the output module 380, or the river analysis results and geographic information. Map to display the GIS map screen including the river analysis results on the output module 380. The main module 310 receives the result of the division and generation of the rich and the element from the generation module 350 and maps the result to the GIS map screen. In addition, the main module 310 configures the repair and the water quality model input data based on the spatial information through the water quality model input data generation module 311, and links the river with the repair and water quality model through the user graphical interface (GUI). A water simulation is executed, the simulation results obtained through the repair and the water quality model are analyzed through the GUI, and the output module 380 provides the results. In addition, the main module 310 automatically generates repair and water quality model input data and provides the result to the output module 380. Specifically, the main module 310 extracts the input data file configuration data for driving the repair and water quality model from the database, and generates the repair and water quality model data as the input data file according to the repair and water quality model data configuration format, The repair and water quality model analysis module 400, which is a program, is executed, and the simulation results of the repair and water quality model are loaded from the result file, and the display device or the user terminal 101 directly connected through the output module 380 in the form of text or graph. ). The repair and water quality model may be a QUAL2E model, in which case the input file configuration data includes weather, climate, topography, temperature correction coefficients, stream segment identification and location, dilution flow rate, type identification data of rich and element, and sewer Hydraulic coefficients, dissolved oxygen (DO) and biochemical oxygen demand (BOD) coefficients, N and P reaction coefficients, reaction coefficients for algae and other items, incremental inflow data for nonpoint sources, stream confluence data, and upstream data. For example, it may be the pollutant loading data of point source.

Generation module 350 is a rich generation module 360 for generating a rich by performing a rich split based on the repair and water quality information on the basis of the river center line, and an element for performing the element split for each of the divided rich Module 370. Since the river center line is generated manually or automatically as in the prior art, the detailed description thereof will be omitted.

In more detail, the rich generation module 360 sets a hydraulic equalization section as a result of the HEC-RAS to define the rich. The rich split module 360 compares the HEC-RAS results with the flow rate (QV) and the flow rate (QH) to search for candidates for hydraulic equivalence intervals, and generates rich breakpoints based on the hydraulic equivalent flow intervals. Partition and store the rich of spatial data. Here, the hydraulic equivalent section means a section in which the hydraulic information is similar or identical. In other words, if the flow rate difference between the connected previous section and the subsequent section does not exceed the range of the set value, the hydraulic equivalent section is determined. After the hydraulic equalization section is divided, the rich splitting module 360 reads the flow coefficient data from a file in the module for inputting the flow coefficient for each divided rich and collectively inputs it through a GUI in a tabular form divided into the rich. Take it and save it.

The element generation module 370 generates a plurality of elements by dividing at the same interval for each rich. In detail, the element dividing module 370 generates and stores the elements by dividing them at intervals designated for each rich, and stores information by connecting the information to the elements belonging to each rich with reference to the information of the parent rich.

3 is a flowchart illustrating a method for modeling river repair and water quality based on a geographic information system according to the present invention.

2 to 3, first, the main module 310 of the repair and water quality modeling apparatus sets up an environment for the spatial mapping layer, receives a water quality simulation target region through the input module 340, and analyzes the stream. An analysis environment setting process of obtaining simulation information including a digital elevation model, which is geographic information about curves of river water surface, is performed from 320 (S311). The spatial figure layer (layer) is a geographical layer composed of a set of objects having the same personality, and one layer has the same geometry and properties of the same points, lines, and faces. For example, the spatial topology may be a road hierarchy, a building hierarchy, a water supply hierarchy, an intellectual hierarchy, a reference point hierarchy, a spatial image hierarchy, and a digital topographic hierarchy.

The control module 310 analyzes the rich splitting point of the stream based on the river centerline by controlling the rich generating module 360, and divides the rich splitting point based on the analyzed rich splitting points to generate a plurality of riches. It performs (S315).

When the riches are generated, the main module 310 performs an element generating process of generating elements by dividing the divided rich at equal intervals for each of the divided riches through the element generating module 370 (S317).

When the rich elements are generated, the main module 310 performs an element attribute definition process for defining rich identification information, etc. to which the corresponding element belongs, for each of the rich elements.

When the attributes for each of the elements are defined, the main module 310 converts the hydraulic and water quality model input data files necessary for executing the hydraulic and water quality models such as QUAL2E, and associates the inputs with the hydraulic and water quality models. The repair and water quality model linking process (S321) for modeling the data file is performed.

The repair and water quality model linking process specifically generates an input data file for building the input data file required for the execution of QUAL2E in accordance with the format of the input data file with the information constructed in the previous process, and executes QUAL2E as an external program. The process of storing the database 221.

When the analysis is performed by linking the hydraulic and water quality models, the main module 310 reads the result file obtained from the database 221 and reads the value according to the result file format to express the result in a table and a graph. It performs (S323).

4 is a process diagram showing a rich generation method of the repair and water quality modeling method according to the present invention, Figure 5 is a view for explaining the process of setting the rich generated according to the present invention, Figure 6 is a HEC according to the present invention FIG. 7 is a diagram illustrating a result file and contents of a RAS, FIG. 7 is a diagram illustrating a split point search screen for setting a equalization section according to an embodiment of the present invention, and FIG. 8 is a flow coefficient according to an embodiment of the present invention. 9 is a diagram illustrating an input screen, and FIG. 9 is a diagram illustrating a map screen applied to geographic information after rich division is completed according to an embodiment of the present invention. A description with reference to FIGS. 4 to 9 is as follows.

First, the main module 310 is selected by the user as shown in FIG. 6 or automatically corresponding to the corresponding river section in order to input flow conditions for reference in the rich split required for the QUAL2E repair and water quality model driving. The RAS driving result is taken from the database 221 to derive a hydraulic coefficient of the river section (S611). Rich is a line representing the hydraulically identical areas of the hydraulic and water quality models along the stream center line. The classification of riches is essential information for water simulation through hydraulic and water quality models. Therefore, in order to divide the rich, the flow rate, flow velocity, and water level information for each point of the stream are needed, and this information can be extracted from the result of HEC-RAS.

As described above, when the hydraulic coefficient of the river section is derived, the rich generation module 360 combines the stream centerline and the HEC-RAS result generated as shown in FIG. 5 to extract displacement sharp points where the difference in the hydraulic coefficient exceeds a set value ( S613).

There are a manual method and an automatic method to extract the displacement sudden point.

First of all, if the rich split step is selected, the rich setup window appears with the flow rate and flow level relationship graphs using the flow conditions imported in the previous step. At this time, when the user examines the result shown and selects a rich setting in a section that is determined to be a mathematically equivalent section, the user is stored in the memory as a split point candidate and repeatedly registers another candidate point in the same manner. Here, the equalization section means a section between an inflection point and an inflection point in which flow velocity or flow rate change rapidly.

And the automatic method is to set the rich break point automatically through the split point search command. Through the search of the result of HEC-RAS, the flow rate of the previous point and the flow rate of the next point is extracted by extracting the point larger than the set value. It is to store the point as a rich split candidate.

Since the set value is a range of flow displacements depending on the size of the target river, the standard deviation of displacement values at the point where the flow difference occurs is calculated as in Equation 1 below and used as a default value. The calculated default value can be changed by the user.

When the displacement sudden points are extracted as described above, the rich generation module 360 sets the displacement sudden points as the split points along the stream center line and connects the two split points to the line-shaped rich (S615).

When the split point and the rich are set, the rich split screen is displayed as shown in FIG. 7, and the split point search rate and various information related to the rich split are displayed.

After the rich classification is completed, the main module 310 receives and sets the flow coefficient for each reach and the Manning roughness coefficient to be applied through the flow coefficient input screen as shown in FIG. 8 (S617). The flow coefficient and roughness coefficient are divided into a method of manually inputting and storing the data for each rich and a method of automatically inputting the file stored as a text file (.csv).

When the rich generation is completed as described above, the main module 310 or the rich generation module 360 stores the generated rich information in the database 221. The generated rich is mapped to the GIS map as shown in FIG. 9 at the time of generating the rich or when the user desires it and displayed through the output module 380.

In order to construct the rich by the conventional method, the hydraulic characteristics should be marked on the paper map including the river boundary, and the virtual river center line should be drawn to separate the sections. The input data shall be made by converting the actual distance through the scale for the separated section and displaying the flow coefficient and roughness coefficient for each reach. In addition, in order to convert the input data into the hydraulic and water quality model input data file format, the input data file structure must be identified and manually inputted to the input data file location manually. When the input data file is generated in this way, the input data may be configured differently for each worker, and a large amount of errors may occur in a complicated work process, especially a real distance conversion process. In addition, when converting the input data into the input data file, a mistake may occur in the correct text position, which may cause an error in executing the repair and water quality model.

FIG. 10 is a flowchart illustrating a river simulation section and an automatic element splitting method of the repair and water quality modeling method according to the present invention, FIG. 11 is a view showing a detailed configuration of an element splitting module according to the present invention, and FIG. FIG. 13 is a diagram illustrating a map screen in which element division is completed and reflected in geographic information. FIG. 13 is a diagram illustrating an element information setting screen according to an exemplary embodiment.

10 to 13, when the riches are generated as shown in FIG. 4, the element generation module 370 displays a GUI setting window for receiving input required for element division. When the element layer name and the division interval are input, the element generation module 370 sets a division interval to be divided into equal intervals for each rich (S711).

When the division interval is set, the element generation module 370 verifies an element generation condition for each river rich (S713) and determines whether the division interval is appropriate (S715).

If it is not suitable, after resetting the element division interval of the corresponding rich (S717), the suitability determination is performed by verifying the element generation condition for the corresponding rich. The element generation condition indicates a constraint of QUAL2E. For example, if the allowable number of elements in the QUAL2E constraint is set to 500 or 20 per rich, the division interval when the number of elements exceeds 500 or 20 per rich. Is set to larger to reduce the maximum number of elements.

  When it is determined in the suitability determination (S715) that the division interval is suitable, the element generation module 370 generates a schematic diagram (S719), and stores the divided element division result for each rich in the database 221 (S721). The schematic diagram is a diagram of a complex river according to the hierarchy of rivers located in the same basin.

As in the above example, the number of elements per rich in the simulation target section of the river is limited to 20, and the total number of elements in the simulation section is preferably limited to 500. This is to match the constraints of the QUAL2E model for compatibility with the QUAL2E model.

The result of automatic element splitting performed on the basis of the GIS system is stored in the database 221 so that it can be used as input data for river repair and water quality modeling configuration as needed, and in the QUAL2E repair and water quality model analysis module 400 It is configured to call the result of element splitting.

When the element division is completed, the element generation module 370 must specify the attribute of each element for each rich through the main module 310. The attribute designation of the element is performed through the element attribute GUI window screen as shown in FIG. 13 (S723). In the initial screen, the element ID information and the rich ID information of the corresponding element can be checked.

In order to construct the element by the conventional method, as in the case of constructing the rich by the conventional method above, the rich must be marked on the paper map including the river boundary and the division points are drawn by drawing the split points at the same interval. The input data should be created by converting the actual distance through the scale for the separated sections and displaying the attributes for each element. In addition, in order to convert the input data into the hydraulic and water quality model input data file format, the input data file structure must be identified and manually inputted to the input data file location manually. When the input data file is generated in this way, the input data may be configured differently for each worker, and a large amount of errors may occur in a complicated work process, especially a real distance conversion process. In addition, when converting the input data into the input data file, a mistake may occur in the correct text position, which may cause an error in executing the repair and water quality model.

14 is a view showing a procedure of the repair and water quality model input data generation method of the repair and water quality modeling method according to the present invention, Figure 15 is a view showing the configuration of the main module for generating a QUAL2E model input data according to the present invention 16 is a view showing a Qual2E input data file setting screen according to an embodiment of the present invention, Figure 17 is a view showing a repair and water quality model input data file created in a text format according to an embodiment of the present invention. FIG. 18 is a diagram illustrating a simulation of a repair and water quality model of a display module according to an embodiment of the present invention on a screen, and FIG. 19 is a repair and water quality model result file created in a text format according to an embodiment of the present invention. Is a view showing.

14 to 19, the QUAL2E hydraulic and water quality model input data generation module 311 included in the main module 310 includes GIS data and analysis such as hydraulic coefficient calculation data, rich and element attribute data, and river data. It extracts the data necessary for generating model input data from the data, and generates input data of QUAL2E model by receiving general information constituting the model input data and main parameters of the model from the user.

In detail, the repair and water quality model input data generation module 311 extracts data such as hydraulic coefficient, rich, element, water quality, and pollution source stored in the database 221, and converts the model input data through the input data window as shown in FIG. 17. The general information to be configured and the main parameters of the model are received from the user (S811 and S813).

When general information and parameters are input from the user, the repair and water quality model input data generation module 311 utilizes information such as the hydraulic coefficient, rich, element, water quality, and pollutant extracted in the above-described process to determine the input data of the QUAL2E model. Model rich / element information creation (S815), hydraulic characteristic information creation per richness (S817), model initial value setting (S819), pollution source information creation (S821), and other model parameter creation (S823) are created and modeled to correspond to the format. The input data is generated and stored in the database 221 (S825). The hydraulic and water quality model input data file may be created in a text format as shown in FIG. 18. The model initial water quality factors include dissolved oxygen, biochemical oxygen demand, temperature, chlorophyll a, organic nitrogen, ammonia nitrogen, nitrite nitrogen, organic phosphorus, dissolved phosphorus, and coliform bacterium. Coliform), arbitrary non-conservative substances, three kinds of preservative substances, and 13 kinds. The parameter may include weather data including solar radiation, air pressure, wind speed, and the like, algae precipitation rate, E. coli killing coefficient, and the like, and coefficient data.

The model input data generation module 311 may be configured to perform repair and water quality modeling, such as the external repair and water quality model analysis module 400, and the output of the modeling result through the output module 380 when the repair and water quality modeling is executed. It extends to display function.

18 shows the result generated after driving the model. Click the Import QUAL2E Result button to load the result file of the QUAL2E model, select the mock item and press the Set button to display the results of Response Factor and Result View I and Result View II.

The accuracy of the simulation results can be confirmed by comparing them with the results of the water quality simulations, if any.

In addition, the result generated after driving the model may be provided in a text form as shown in FIG. 19.

The existing method that can be confirmed through the result file is difficult to grasp the overall status at a glance because the results of the water quality hair are displayed in text. The hydraulic and water quality model result output module extracts the water quality simulation results required by the user and displays them through tables and graphs, making it easy to grasp the current status and trends of the overall simulation results, and comparing the actual data to the accuracy of the simulation results. And improve the reliability.

20 is a section separation diagram for converting an actual stream into data in a form that can be used in a repair and water quality model according to an embodiment of the present invention.

A rich and an element will be described with reference to FIG. 20.

In order to simulate the QUAL2E model for the water quality prediction of the river, the boundary area is set in the river to predict the water quality, and the elements with specific calculations are set by dividing the sections with similar hydraulic characteristics into the rich and dividing the rich into the same length again. The length of an element must be divided into equal lengths in all riches, with one rich being split up to 20 elements.

The sections with similar hydraulic characteristics of the stream to be simulated are defined as the same cod, ie, rich, and the method is divided using the HEC-RAS hydraulic and water quality models. When the rich is divided by the same length and a specific calculation is performed, the length of the small section, that is, the length of the element is equally applied. In FIG. 20, elements are numbered 1 to 25.

① Headwater Element: Element located at the uppermost part of main stream and tributary-Element 1, 9

② Standard Element: Element which is the most general element element and not included in other range-No. 2, 4 ~ 7, 10 ~ 13, 15 ~ 17, 19 ~ 20, 22 ~ 24

③ Element Just Upstream from a Junction: The main stream section just above the junction and the junction-No. 8

④ Junction Element Element: The mainstream element element at the point where it is joined with the tributary.

⑤ Last Element Stream: The lowest element element of the stream.

⑥ Contaminant Load Element Element (Input Element): Element element where point source exists as mainstream element.

⑦ Withdrawal Element: Element element that drains water from mainstream section through intake, etc.-No. 21

The number of sections that can be specified when driving the model is as follows.

① Number of large sections: Maximum 50

② Number of elements: 20 per section or 500 in total

③ Headwater Element: Maximum 10

④ Junction Element: Max 9

⑤ Point pollutant inflow or intake section: maximum 50

Table 1 below lists the input data required for model construction.

division Input Description QUAL2E datatype title River name, simulation date, target water quality factor, and unit of factor Title Data Control Classify normal or dynamic state,
Status of simulated rivers, physical and meteorological conditions of simulated rivers Data Type1 Compartment
And compartment length The number, unique name, and length of each compartment Data Type2 Flow increase data Data required for increasing flow
Target dissolved oxygen concentration value Data Type3 Small compartment data The number of subcompartments in each compartment and the form of the subcompartments; Data Type 4 Repair materials · Mathematical and hydrological characteristic coefficients and Manning roughness coefficients Data Type 5 Ratios and coefficients BOD removal rate, ratio of chlorophyll-a to algae, algae precipitation rate, coefficient for ammonia oxidation, coefficient for NO2-N oxidation, E. coli killing coefficient, decomposition coefficient of non-conservative substances Data type
6, 6A, 6B Initial condition Initial condition of each compartment, 13 water quality factors Data type
7, 7A Incremental inflow Groundwater inflow data, 13 water quality factors Data type
8, 8A River Confluence Branch Small compartment composition of tributaries and main streams at the confluence of rivers Data Type 9 Incremental inflow Groundwater inflow data, 13 water quality factors Data type
8, 8A River Confluence Branch Small compartment composition of tributaries and main streams at the confluence of rivers Data Type 9 Suwon Flow rate and concentration of 13 water quality factors upstream of the compartment Data type
10, 10A Point source and water intake Flow rate and concentration of 13 water quality factors taking into consideration the load of the stream and water intake Data type
11, 11A Weather data Weather data necessary to simulate temperature or algae behavior
Solar radiation, cloud cover, wet and dry bulb temperature, air pressure, wind speed, etc. Climatological
Data Other Simulation coefficient of Algae, nitrogen, phosphorus
Dam reaeration data, river boundary conditions Data type
1A, 1B,
12, 13, 13A

On the other hand, the present invention is not limited to the above-described typical preferred embodiment, it can be carried out in various ways without departing from the gist of the present invention various modifications, changes, substitutions or additions in the art Anyone who has this can easily understand it. If the implementation by such improvement, change, replacement or addition falls within the scope of the appended claims, the technical idea should also be regarded as belonging to the present invention.

101: user terminal 110: water quality measurement device
120: wired and wireless data communication network 200: repair and water quality modeling system
210: local data communication network 220: repair and water quality modeling device
230: web server 310: main module
320: river analysis (HEC-RAS) module 330: river center line extraction module
340: input module 350: generation module
360: rich generating module 370: element generating module
380: output module 400: repair and water model analysis module

Claims (18)

Database for storing repair and water quality information, geographic information,
Using the repair and water quality information and geographic information, the simulation section of the river for performing repair and water quality modeling is automatically divided into rich and element, and the repair and water quality model analysis module from the repair and water quality information and the rich and element information. A geographic information system-based river repair and water quality modeling system comprising a repair and water quality modeling device for generating a repair and water quality model input data file required by.
The method of claim 1,
The repair and water quality modeling device,
A river analysis module for generating information on the result of analyzing the hydraulic characteristics of the river based on the geographic shape of the river;
A generation module for generating a rich and an element along a river centerline using repair and water quality information of the simulation section of the river;
A main module for generating a repair and water quality model input data file required by the repair and water quality model analysis module for performing the repair and water quality modeling of the generated rich and element and the repair and water quality information; Geographic information system based river repair and water quality modeling system comprising a.
The method of claim 2,
And an output module for mapping the generated rich and element and the repair and water quality model analysis module to geographic information by mapping the rich, element, repair and water quality modeling information performed by the generated repair and water quality model input data file. Geographic information system based river repair and water quality modeling system comprising a.
The method of claim 3,
The output module,
The geographic information system-based river repair and water quality modeling system further comprises a graphic information that can graphically map the information into a graphical form with the geographic information to which the rich, element, hydraulic and water quality modeling information is mapped. .

The method of claim 2,
The rich generation module,
The candidate analysis section is searched hydraulically equally along the river center line by comparing the stream analysis result information with the flow rate and the flow rate.
Create a rich split point based on the equalization section, generate and store the rich by connecting the rich split points,
The geographic information system-based river repair and water quality modeling system, characterized in that for receiving the flow coefficient and roughness coefficient data for each of the generated rich and mapped to the corresponding rich and stored.
The method of claim 5,
The rich generation module automatically sets the rich split point, but extracts a point in which the flow rate of the previous point and the flow rate of the subsequent point is greater than a preset value through the search of the HEC-RAS result, and divides the corresponding point. Geographic information system-based river repair and water quality modeling system, characterized in that the set as a candidate group.
The method of claim 6,
The set value is a geographic information system-based river repair and water quality modeling system, characterized in that the standard deviation of the displacement values of the point where the difference in the flow rate calculated by the following equation (2).
[Equation 2]

The method of claim 4, wherein
And a web server receiving the graphic information and the geographic information from the output module and providing the graphic information to the user through a web page.
In the geographic information system-based river repair and water quality modeling method,
The river analysis module sets up a river simulation section, which is a section for repair and water simulation, and obtains a numerical elevation model including geographic information about the curves of the river surface;
A rich generation process of generating, by the rich splitting module, a rich splitting point along a river centerline based on the repair and water quality information of the stream simulation section, and connecting the rich splitting points to generate a richly equalized section;
An element generation process of generating, by the segment division module, elements that are divided at equal intervals for each of the generated riches;
A process of defining an element attribute by the main module to specify spatial and environmental information for each of the generated elements;
The main module includes a repair and water quality model linking process of generating a repair and water quality model input data file necessary for the execution of the river repair and water quality model model from the repair and water quality information and the rich and element information, and storing them in a database. How to.
10. The method of claim 9,
The analysis environment setting process,
An environment setting step for setting up the spatial geometry layer,
A step of inputting a target area of a hydrophilic wool receiving a target area of a hydrophilic wool for setting the simulation section;
And obtaining a digital elevation model for obtaining simulation information including the numerical elevation model for the received water quality simulation target area.
10. The method of claim 9,
The rich generation process,
A constant flow section candidate search step of searching for a hydraulically equalizing section candidate by comparing stream analysis result information with a flow rate and a flow rate level,
Generating rich split points based on the hydraulic equivalence interval, and generating and storing the rich by the rich split points;
And setting the rich river characteristic information for each of the generated rich streams.
The method of claim 11,
In the rich generating step, the rich splitting points are automatically set, and the rich splitting is performed by extracting a point where the flow rate of the previous point and the flow rate of the subsequent point are greater than the preset value through the search of the HEC-RAS result. And the candidate group is set.
The method of claim 12,
The set value is characterized in that the standard deviation of the displacement values of the point where the difference in the flow rate calculated by the following equation (3) occurs.
[Equation 3]

The method of claim 11,
The rich river characteristic information includes at least one of a flow coefficient and a roughness coefficient.
10. The method of claim 9,
The element generation process,
An element generation step of automatically dividing an element at equal intervals specified for each of the generated riches;
And a property setting step of grasping the number of elements for each rich and organically connecting and storing the information of the lower road.
10. The method of claim 9,
The repair and water quality model linkage process,
An information extraction step of extracting an input data file configuration data for driving a hydraulic and water quality model;
And an input data file generating step of converting the extracted input data file configuration data into a format required by the hydraulic and water quality models to generate a hydraulic and water quality model model input data file.
10. The method of claim 9,
The method may further include a simulation result generating process of generating and storing simulation result information of the repair and water quality models by performing repair and water quality modeling by loading the generated repair and water quality model input data file which is executed externally. .
The method of claim 17,
And mapping the simulation result information of the generated hydraulic and water quality models to geographic information to display at least one of text, tables, and graphs.

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