JP4393130B2 - Rainwater section allocation method for one pipe - Google Patents

Description

  The present invention relates to a method for allocating rainwater compartments for one conduit suitable for use in preparing a drainage area of rainwater, that is, a rainwater compartment split for sewer pipes in a predetermined area.

  Conventionally, in order to create a division ratio that flows into a pipeline composed of rainwater pipes, merging pipes, etc. in the sewer, in the pipeline 1 along the road etc., 45 degrees from the intersection of each pipeline 1 as shown in FIG. The division is performed by dividing the intersections of the straight lines (Kamekou) into equal divisions according to the pipeline 1.

  In addition, in the conventional sewer sewer rainwater trunk, merge main trunk, etc., the main section plot is created by the designer's judgment in consideration of the terrain inclination by the contour line of the topographic map (scale, for example 1/2500). In this case as well, in the rainwater branch line (rainwater pipe line) and the merge branch line (joint pipe line), the mainstream is to create the rainwater division by equal division according to the above-described pipe line 1.

  Therefore, the inflow range (inflow area) of rainwater flowing into each pipe line is constant according to the pipe line.

  However, in the rainwater outflow, the direction of water collection is actually determined by the slope of the terrain, etc., the amount of rainwater flowing into each pipe is different, and the inflow range of rainwater flowing into each pipe is in accordance with the pipe as before. When the rainwater inflow amount is calculated to be constant, there is a possibility that inconveniences such as inundation damage may occur due to the difference in the rainwater inflow amount depending on the pipeline.

  In view of the above, an object of the present invention is to accurately determine a range (division allocation) of rainwater inflow and to accurately calculate the amount of rainwater inflow.

In order to solve the above-mentioned problems and achieve the object of the present invention, the “rainwater section allocation method for one pipe line” of the present invention first divides the three-dimensional map data into mesh-like areas and generates mesh data. A mesh data forming step , a pipeline data storage step for preliminarily storing, for each divided mesh area, pipe data relating to a pipe for draining rainwater that pours into the divided mesh area, and a divided mesh Each area includes a land use situation data storage step for preliminarily storing the land use situation data as an attribute of the mesh area.
In addition, the pipeline data related to the mesh area divided into meshes is searched, the pipeline data is obtained for each mesh area, and the pipeline data related to each mesh area is obtained as a result of the GIS analysis process. And a first grouping process is performed in which an identification number is assigned to the pipeline data for each group.

Further, the “rainwater section allocation method for one pipeline” of the present invention confirms that the identification numbers of pipeline data are allocated to all mesh areas in the first grouping process described above. In this allocation confirmation process, a set of mesh areas with the same identification number attached to the assigned pipeline data is combined as one polygon figure and assigned as a rainwater section of one pipeline. Yes.
Then , the land use situation data is retrieved to obtain the land use situation data related to each mesh area, and the remaining mesh area to which the identification number of the pipeline data is not assigned in the first grouping processing step. When the mesh area exists, the land use situation of the remaining mesh area is determined based on the land use situation data.

Further, when it is determined that the remaining mesh area is a densely populated area based on the land use status data and the GIS analysis processing result, the remaining mesh area adjacent to the mesh area assigned with the identification number is searched. The rainwater section is assigned by assigning the same identification number to the remaining mesh area adjacent to the mesh area to which the identification number is assigned. If it is determined that the remaining mesh area is not a densely populated area based on the land use status data and the GIS analysis processing results, the lowest altitude mesh area with the lowest altitude is selected from the remaining mesh areas. Then, an adjacent residual mesh area whose inclination direction is directed to the minimum altitude mesh is searched. Then, this search is sequentially repeated to perform the second grouping process.

  According to the present invention, pipe data of a predetermined area is obtained and mesh data obtained by dividing the predetermined area into a plurality of meshes having a predetermined size having information on the inclination direction is obtained based on the data obtained by superimposing the data. Since the rainwater inflow range (rainwater section) of the pipe is determined, the rainwater section for this one pipe can be determined with high accuracy, and the amount of rainwater inflow into this one pipe is calculated with high accuracy. be able to.

  Further, according to the present invention, since this rainwater section allocation is determined by data processing, this rainwater section allocation can be automatically and accurately determined without error due to artificial design.

  Hereinafter, an example of an embodiment of a method for assigning rainwater sections to a pipe line according to the present invention will be described with reference to the drawings.

  FIG. 1 shows functional blocks for explaining the rainwater section allocation method for one pipe according to the present example. In FIG. 1, reference numeral 10 denotes a pipe data memory in which pipe data of a predetermined area is registered.

In this example, as shown in the flowchart of FIG. 2, pipeline data for a predetermined area where the rainwater division is to be divided is created and stored in the pipeline data memory 10 (step S2). As shown in FIGS. 4A and 4B, this pipe line 1 is formed by joining pipe diameter changing points and pipe rods 2 between merging points. In this case, even if the pipe diameter is the same, this pipe rod 2 is not subject to coupling after the tube rod 2 that becomes the junction.

  For the pipe line 1 in which the pipe tub 2 is continuous, the inner diameter of the attribute of the pipe tub 2 is referred to, and if the value is the same, the pipe tub 2 is combined to form one pipe line 1. Three or more pipe rods 2 may be combined. Further, the pipes 2 from the upstream are joined together as one pipe line 1. An ID (identification number) is assigned to each of the pipelines 1.

  The pipeline data from the pipeline data memory 10 is supplied to the search processing unit 11. Reference numeral 12 denotes a land use data memory. In the land use data memory 12, whether the predetermined area is a residential area or a commercial area in a densely populated area, or there is a large change in landforms such as forest land and agricultural land. Land use data such as whether the area has no effect on rainwater runoff due to things is stored. The land use data from the land use data memory 12 is supplied to the search processing unit 11.

  In FIG. 1, reference numeral 13 denotes a 3D map data memory in which 3D map data of an altitude obtained from, for example, a stereo aerial photograph of a predetermined area and its plane position is stored. Data is supplied to the mesh processing unit 14.

  In the mesh processing unit 14, the predetermined area is inclined (arrow) as shown in FIG. 5 based on the three-dimensional map data of the predetermined area to be divided by the GIS (Geographic Information System) analysis processing unit 15 according to the instruction of the rainwater section. Are divided into a plurality of meshes 3, 3... Having a predetermined size, for example, 5 m square by actual measurement, and mesh data is obtained. In this example, as shown in the flowchart of FIG. 2, when starting the rainwater division in a predetermined area, mesh data having information on the inclination direction of the predetermined area is formed (step S1). The mesh data may be formed either before or after step S2.

  The search processing unit 11 obtains mesh data divided into a plurality of meshes 3, 3, 3,. To supply. In this search processing unit 11, as shown in FIG. 5, the mesh data divided into a plurality of meshes 3, 3,... Then, the pipeline data of a predetermined area to be divided into rainwater sections are spatially superimposed.

  The search processing unit 11 searches for the mesh 3 overlapping the pipe 1 from the superimposition data of the pipe data and the mesh data as shown in FIG. 5 according to the instruction of the GIS analysis processing unit 15, and this one pipe 1 The ID (identification number) of this one pipe line is added to the mesh 3 that overlaps with.

  In this case, the main line is excluded as the pipeline 1 to be searched. When a plurality of pipelines 1 overlap with one mesh 3, the ID of the pipeline with the lowest downstream pipe bottom height is added to the mesh (step S3).

  The processing data obtained by the search processing unit 11 is supplied to the grouped primary processing unit 16. In the grouping primary processing unit 16, the processing data from the search processing unit 11 is subjected to primary grouping processing in accordance with an instruction from the GIS analysis processing unit 15 (step S4).

  As shown in FIG. 6, the primary processing of this grouping searches for an adjacent mesh that is in contact with the mesh 3 to which the ID of one pipeline 1 that is a mesh 3 overlapping with the one pipeline 1 is added. The ID of this one pipeline 1 is added on condition that the mesh has an inclination direction in the direction in contact with the mesh 3 to which the ID of one pipeline 1 is added.

  Next, an adjacent mesh that is in contact with the mesh 3 to which the ID of one pipeline 1 is newly added is searched, and the inclination direction is a direction in which the adjacent mesh is touched to the mesh 3 to which the ID of one pipeline 1 is added. The ID of this one pipeline 1 is added on condition that the mesh has

  The above is repeated until there is no mesh having an inclination direction in the direction of the mesh 3 to which the ID of one pipe line 1 is added among the adjacent meshes that are in contact with the mesh to which the ID of one pipe line 1 is added. When the process is performed for all the pipelines in the predetermined area, the grouping primary process is terminated. In this case, meshes already assigned with IDs of other pipelines are excluded from search targets.

  At the end of the primary grouping process, it is determined whether all of the meshes 3 meshed from the predetermined area have been assigned any pipe ID (step S5). If the pipeline ID is added (Y), the integration unit 17 for each pipeline unit combines the meshes with the same pipeline ID added as one polygon figure as shown in FIG. Then, it is assigned as a rainwater section of one pipe line (step S6) and the mesh contour is smoothed as shown in FIG. 8 (step S7).

  In step S5, when the grouping primary processing unit 16 ends the grouping primary processing, the pipe ID is not added among the meshes 3, 3,. When there is a remaining (isolated) mesh (N), this residual mesh data is supplied to the land use determination unit 18 to determine the land use status (step S8).

  In the land use determination unit 18, in accordance with the instructions from the GIS analysis processing unit 15 based on the land use data in the land use data memory 12, whether the residual mesh is a densely-built district in a residential district or a commercial district is determined. It is judged whether the area has a large terrain change such as land and agricultural land and has no influence on rainwater runoff by buildings.

  When the land use determining unit 18 determines that the remaining mesh is a residential or commercial district building dense district, the process proceeds to step S9. In step S9, the grouping secondary processing unit 19 performs one control. An adjacent mesh in contact with the mesh to which the road ID is added is searched, the ID of this one pipe line is added to this adjacent mesh, and this is repeated until there is no remaining mesh.

  As shown in FIG. 7, the integrated processing unit 17 for each pipeline assigns the rainwater section of this one pipeline to the mesh to which the ID of this one pipeline is added (step S6). ) And smoothing the mesh contour as shown in FIG. 8 (step S7).

  When the land use determination unit 18 determines that the remaining mesh is a district having a large terrain change such as a forest or an agricultural land and has no influence on the rainwater outflow by the building or the like, the process proceeds to step S10. The grouping secondary processing unit 19 performs processing as shown in the flowchart of FIG. 3 in accordance with an instruction from the GIS analysis processing unit 15.

  First, as shown in FIG. 9, one remaining mesh area (concave) (A) surrounded by a mesh to which any pipe ID is added by the above-described primary processing is selected (step S11). The minimum altitude mesh (B) in the remaining mesh area is searched (step S12).

  Next, search for an adjacent mesh that touches the mesh (B) at the minimum elevation, search for a mesh whose inclination direction is toward the mesh (B) at the minimum elevation, and make this a group (B). Further, an adjacent mesh that is in contact with the mesh of the (B) group is searched, and among the adjacent meshes, a mesh having an inclination direction in the direction of the mesh of the (B) group is further set as the (B) group, and the above-described processing is repeated.

  It is determined whether or not there is a remaining mesh area (concave) (A) surrounded by a mesh to which any pipe ID is added by the above-described primary processing (step S14), and until this residual mesh area disappears Steps S12 and S13 are repeated for each remaining mesh area.

  When the above grouping process is completed for the remaining meshes, the process proceeds to step S15. In this step S15, the minimum altitude mesh (C) is searched from the outer circumference meshes of the grouped meshes, and then the ID of the primary processed pipe line with which the minimum altitude mesh (C) of the outer circumference of this group is in contact. Is added to all the meshes of this group (step S16).

  Next, it is determined whether or not there is a mesh group to which any pipeline ID is not added (step S17). If there is a mesh group, steps S15 and S16 are repeated, and any pipeline ID is added. When there is no mesh group, the processing in the grouping secondary processing unit 19 ends.

  When the processing in the above-described step S10 in the grouping secondary processing unit 19 is finished, the mesh unit to which the same pipeline ID is added as shown in FIG. The two polygon figures are combined and assigned as a rainwater section of one pipe line (step S6), and the mesh contour is smoothed as shown in FIG. 8 (step S7).

  According to this example, pipeline data for a predetermined area is obtained and mesh data divided into a plurality of meshes of a predetermined size having information on the inclination direction of the predetermined area is obtained. Since the range of rainwater flowing into the pipeline (rainwater compartment) is determined, the rainwater compartment for this one pipeline can be determined with high accuracy, and the amount of rainwater inflow into this one pipeline can be calculated accurately. Can do.

  Further, according to this example, since this rainwater section allocation is determined by data processing, this rainwater section allocation can be determined automatically and accurately without any error due to artificial design.

  In addition, according to this example, among the mesh data divided into a plurality of meshes, the allocation of the remaining mesh whose allocation pipeline is not determined is performed by referring to the land use situation. The use situation can be determined optimally depending on whether it is a residential area or a commercial area where buildings are densely populated, or where there is a significant change in topography, such as forest land or agricultural land, and where there is no impact on rainwater runoff due to buildings.

  Of course, the present invention is not limited to the above-described examples, and various other configurations can be adopted without departing from the gist of the present invention.

It is a functional block diagram with which it uses for description of the example of embodiment of the rainwater division allocation method with respect to the 1 pipe line of this invention. It is a flowchart with which it uses for description of the example of embodiment of the rainwater division allocation method with respect to the pipe line of this invention. It is a flowchart with which it uses for description of the example of the principal part of this invention. It is a diagram with which it uses for description of this invention. It is a diagram with which it uses for description of this invention. It is a diagram with which it uses for description of this invention. It is a diagram with which it uses for description of this invention. It is a diagram with which it uses for description of this invention. It is a diagram with which it uses for description of this invention. It is a diagram with which it uses for description of the example of the rainwater division allocation method with respect to one conventional pipe line.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Pipe line, 2 ... Pipe pipe, 3 ... Mesh, 10 ... Pipe line data memory, 11 ... Search processing part, 12 ... Land use data memory, 13 ... 3D map data memory, 14 ············································································································································································· Grouping 2 Next processing section

Claims (1)

Mesh data forming step of obtaining mesh data by dividing three-dimensional map data into mesh-like regions ;
A pipeline data storage step for preliminarily storing pipeline data relating to pipelines for draining rainwater that pours into the divided mesh regions, for each of the divided mesh regions ;
For each of the divided mesh areas, a land use situation data storage step for storing the land use situation data in advance as an attribute of the mesh area;
A pipeline data search step for retrieving the pipeline data related to the mesh area divided into meshes and obtaining the pipeline data for each mesh area ;
A first grouping step of grouping the pipeline data related to each mesh region based on a GIS analysis processing result, and assigning an identification number to the pipeline data for each group;
An assignment confirmation step for confirming that the identification numbers of the pipeline data are assigned to all mesh areas in the first grouping process ;
In the allocation confirmation step, a set of mesh areas with the same identification number assigned to the assigned pipeline data is combined as one polygon figure, and a stormwater division assignment step for assigning as a rainwater section of one pipeline ;
Searching the land use status data, and obtaining land use status data related to each mesh area, a land use status data search step;
In the first grouping processing step, when there is a remaining mesh area that is a mesh area to which no identification number of the pipeline data is given, the land use of the remaining mesh area is based on the land use situation data. Land use status judgment step to judge the situation,
Based on the land use situation data and the GIS analysis processing result, when it is determined that the remaining mesh area is a densely populated area, the remaining mesh area adjacent to the mesh area assigned with the identification number A rainwater compartment assignment step for assigning the rainwater compartment by assigning the identification number to the remaining mesh region adjacent to the mesh region to which the identification number is assigned;
Based on the land use situation data and the GIS analysis processing result, if it is determined that the remaining mesh area is not a densely populated area, the minimum elevation mesh area having the lowest elevation in the remaining mesh area is selected. A second grouping process step of performing a second grouping process by selecting and searching for the residual mesh area adjacent to the minimum altitude mesh that has an inclination direction, and repeating this search sequentially;
A method for allocating rainwater compartments for one pipe line.

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