Methods for dividing rainwater pipe sections and their catchment areas, and storage media.

Abstract

This invention discloses a method and storage medium for dividing rainwater pipe segments and their catchment areas. The method includes: dividing the aligned rainwater pipe network according to road intersections to obtain first pipe segments; determining the first catchment area corresponding to each first pipe segment; calculating the number of divisions corresponding to each first pipe segment and the area of ​​the second catchment area corresponding to each first pipe segment; dividing the first catchment area corresponding to each first pipe segment into equal areas to obtain the second catchment areas corresponding to each first pipe segment, with the dividing lines perpendicular to the centerline of the road where the first pipe segment is located; and dividing each first pipe segment according to the intersection of the dividing lines corresponding to each first pipe segment and the centerline of the road where the first pipe segment is located to obtain second pipe segments corresponding one-to-one with each second catchment area. This invention can improve the efficiency of dividing pipe segments and their catchment areas in rainwater pipe design and ensure the rationality of the division results.

Description

Technical Field

[0001] This invention relates to the field of rainwater pipeline planning technology, and in particular to a method for dividing rainwater pipeline sections and their catchment areas, as well as a storage medium. Background Technology

[0002] In the domestic planning and design field, the commonly used method for stormwater pipe design calculations is the inference formula method. The main process of applying the inference formula method for stormwater pipe design includes the following steps: 1. Pipeline alignment; 2. Dividing the design pipe sections; 3. Dividing the catchment area corresponding to each water turbine pipe section; 4. Determining the runoff coefficient and surface water collection time for each catchment area; 5. Determining design parameters such as the design return period of the stormwater pipes; 6. Determining the storm intensity formula and performing stormwater pipe design calculations from upstream to downstream based on the inference formula method.

[0003] The inference formula method is currently the most widely used method in China for stormwater pipe design. It was first proposed by an Irish engineer in the 19th century. Within a certain catchment area, the inference formula method transforms the complex processes of rainfall and surface runoff into a simple and practical process. Its theoretical basis is the ultimate strength theory and three assumptions. The ultimate strength theory has two meanings: 1. When rainwater from the farthest point on the catchment area reaches the collection point, the entire area is converged, and the design flow rate of the stormwater pipe is maximized; 2. When the rainfall duration equals the collection time of rainwater from the farthest point on the catchment area, the amount of rainwater that the stormwater pipe needs to discharge is maximized. The three assumptions are: rainfall is uniformly distributed across the entire catchment area; rainfall intensity remains uniform throughout the collection time; and the catchment area increases at a constant rate with the collection time.

[0004] In the process of applying the inference formula method for stormwater pipeline design, the division of design pipe sections and catchment areas are two extremely important steps. They directly affect the calculated pipe diameter and slope, thus influencing the project cost. When dividing design pipe sections and catchment areas, the following two points should be emphasized: 1. The division of the catchment area should ensure that the runoff from the plot is distributed as evenly as possible across the pipe sections on both sides; 2. The calculated pipe diameter of the corresponding catchment area should be continuously changing, ensuring that the pipe size is fully and rationally utilized, reducing unnecessary waste, and guaranteeing the project's economic efficiency.

[0005] Since the division of the catchment area is based on the division of the design pipe sections, and conversely, the division of the catchment area will affect the calculation results of the design pipe sections, the division of the design pipe sections and the catchment area needs to be repeatedly adjusted through trial calculations based on the calculation results during the calculation process, resulting in a lot of complicated work. Therefore, how to quickly and efficiently divide the design pipe sections and the catchment area so that the calculation results of rainwater pipes are more economical and reasonable is the key technical issue in the design and calculation process of rainwater pipes. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a method and storage medium for dividing rainwater pipe segments and their catchment areas, which can improve the efficiency of dividing pipe segments and their catchment areas in rainwater pipe design and ensure the rationality of the division results.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a method for dividing rainwater pipe sections and their catchment areas, comprising:

[0008] Based on the road intersections, the stormwater pipe network after alignment is divided to obtain the first pipe section;

[0009] Determine the first catchment area corresponding to each first pipe section;

[0010] Based on the area of ​​the first catchment area corresponding to each first pipe segment and the preset expected catchment area, calculate the number of divisions corresponding to each first pipe segment, and based on the area of ​​the first catchment area corresponding to each first pipe segment and the number of divisions corresponding to each first pipe segment, calculate the area of ​​the second catchment area corresponding to each first pipe segment.

[0011] Based on the area of ​​the second catchment area corresponding to each first pipe segment, the first catchment area corresponding to each first pipe segment is divided into equal areas to obtain the second catchment area corresponding to each first pipe segment. The dividing line corresponding to each first pipe segment is perpendicular to the center line of the road where it is located.

[0012] Each first pipe segment is divided according to the intersection of the dividing line corresponding to each first pipe segment and the center line of the road where each first pipe segment is located, thus obtaining the second pipe segment that corresponds one-to-one with each second catchment area.

[0013] The present invention also proposes a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method described above.

[0014] The beneficial effects of this invention are as follows: Based on road intersections, the stormwater pipe network is initially divided, and the catchment areas of each first pipe segment are initially determined. Then, based on a preset desired catchment area, a reasonable catchment area is calculated, and the catchment areas of each first pipe segment are further divided. Finally, based on the results of this secondary division, each first pipe segment is further divided, ultimately resulting in corresponding second pipe segments and second catchment areas. This invention solves the problem of repeated adjustments during the design of pipe segments and catchment area divisions, ensuring that the calculation results for stormwater pipes are more economical and reasonable. Attached Figure Description

[0015] Figure 1 This is a flowchart illustrating a method for dividing rainwater pipe segments and their catchment areas according to the present invention.

[0016] Figure 2 This is a flowchart of the method according to Embodiment 1 of the present invention;

[0017] Figure 3 This is a schematic diagram of the division of quadrilateral plots according to Embodiment 1 of the present invention. Figure 1 ;

[0018] Figure 4 This is a schematic diagram of the division of quadrilateral plots according to Embodiment 1 of the present invention. Figure 2 ;

[0019] Figure 5 This is a schematic diagram illustrating the division of a special pentagonal plot according to Embodiment 1 of the present invention;

[0020] Figure 6 This is a schematic diagram of single-sided and double-sided pipe laying in Embodiment 1 of the present invention;

[0021] Figure 7 This is a schematic diagram of the division of the first catchment area according to Embodiment 1 of the present invention;

[0022] Figure 8 This is a schematic diagram of the breaking of the first pipe segment in Embodiment 1 of the present invention;

[0023] Figure 9 This is a schematic diagram illustrating the final pipe section and its catchment area in a certain area according to Embodiment 1 of the present invention. Detailed Implementation

[0024] To explain the technical content, objectives, and effects of the present invention in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0025] Please see Figure 1 A method for dividing rainwater pipe sections and their catchment areas, comprising:

[0026] Based on the road intersections, the stormwater pipe network after alignment is divided to obtain the first pipe section;

[0027] Determine the first catchment area corresponding to each first pipe section;

[0028] Based on the area of ​​the first catchment area corresponding to each first pipe segment and the preset expected catchment area, calculate the number of divisions corresponding to each first pipe segment, and based on the area of ​​the first catchment area corresponding to each first pipe segment and the number of divisions corresponding to each first pipe segment, calculate the area of ​​the second catchment area corresponding to each first pipe segment.

[0029] Based on the area of ​​the second catchment area corresponding to each first pipe segment, the first catchment area corresponding to each first pipe segment is divided into equal areas to obtain the second catchment area corresponding to each first pipe segment. The dividing line corresponding to each first pipe segment is perpendicular to the center line of the road where it is located.

[0030] Each first pipe segment is divided according to the intersection of the dividing line corresponding to each first pipe segment and the center line of the road where each first pipe segment is located, thus obtaining the second pipe segment that corresponds one-to-one with each second catchment area.

[0031] As can be seen from the above description, the beneficial effects of the present invention are: it can solve the problem of repeated adjustments in the design of pipe sections and the division of catchment areas, and ensure that the calculation results of rainwater pipelines are more economical and reasonable.

[0032] Furthermore, determining the first catchment area corresponding to each first pipe segment specifically involves:

[0033] Based on the angle bisectors of the interior angles of the polygonal plots on both sides of the road where each first pipe segment is located, the sub-catchment areas on both sides of the road where each first pipe segment is located are determined.

[0034] Based on the sub-catchment areas on both sides of the road where each first pipe segment is located, determine the first catchment area corresponding to each first pipe segment;

[0035] The edges of the polygonal plot include the edge corresponding to the first pipe segment and other edges, including road edges and / or river edges. The straight line where the road edge is located is the center line of the road, and the straight line where the river edge is located is the center line of the river.

[0036] As described above, the plot can be divided reasonably based on the angle bisectors of its interior angles.

[0037] Furthermore, the determination of the sub-catchment areas corresponding to each first pipe segment on both sides of the road based on the angle bisectors of the interior angles of the polygonal plots on both sides of the road where each first pipe segment is located is specifically as follows:

[0038] Obtain a polygonal plot of land on one side of the road where the first pipe segment is located;

[0039] Based on the angle bisector of the interior angle of the polygonal plot, the sub-catchment area corresponding to one side of the road for the first pipe segment is determined.

[0040] Furthermore, the polygonal plot is a quadrilateral plot;

[0041] The step of determining the sub-catchment area on one side of the road corresponding to the first pipe segment based on the angle bisector of the interior angle of the polygonal plot is as follows:

[0042] If all four sides of the quadrilateral plot are roads, then draw the angle bisectors of the interior angles of the polygon plot to obtain two sets of triangles, each set of triangles including two opposite triangles.

[0043] Select one set of triangles from the two sets of triangles, where the two triangles in the set of triangles do not overlap, and connect the vertices of the two triangles in the set of triangles to obtain the first vertex line;

[0044] Based on the angle bisectors at both ends of the first pipe segment and the line connecting the first vertex, the sub-catchment area corresponding to the first pipe segment on one side of the road is determined.

[0045] If one of the four sides of the quadrilateral plot is a riverbank and the riverbank is adjacent to the side corresponding to the first pipe segment, then the line connecting the first vertices is extended to the riverbank to obtain the line connecting the second vertices.

[0046] The sub-catchment area corresponding to the road side of the first pipe segment is determined based on the angle bisector of the end of the first pipe segment that is away from the river side and the line connecting the second vertex.

[0047] If one of the four sides of the quadrilateral plot is a river side and the river side is opposite to the side corresponding to the first pipe segment, then the sub-catchment area of ​​the first pipe segment corresponding to the road side is determined according to the angle bisectors at both ends of the side corresponding to the first pipe segment.

[0048] If two of the four sides of the quadrilateral plot are river sides and both of the river sides are adjacent to the side corresponding to the first pipe segment, then connect the vertices of the two triangles in the two sets of triangles whose bases are both river sides, and extend them to the two river sides respectively to obtain the third vertex line.

[0049] Based on the line connecting the third vertices, the sub-catchment area on one side of the road corresponding to the first pipe segment is determined;

[0050] If there are two river sides among the four sides of the quadrilateral plot, and one of the two river sides is adjacent to the side corresponding to the first pipe segment, and the other river side is opposite to the side corresponding to the first pipe segment, then the sub-catchment area corresponding to the road side of the first pipe segment is determined according to the angle bisector of the end of the side corresponding to the first pipe segment away from the river side.

[0051] If three of the four sides of the quadrilateral plot are river sides, then the quadrilateral plot is designated as the sub-catchment area of ​​the first pipe segment corresponding to the side of the road.

[0052] Furthermore, the polygonal plot is a triangular plot;

[0053] The step of determining the sub-catchment area on one side of the road corresponding to the first pipe segment based on the angle bisector of the interior angle of the polygonal plot is as follows:

[0054] If all three sides of the triangular plot are road sides, then the sub-catchment area corresponding to the road side of the first pipe segment is determined based on the angle bisectors at both ends of the side corresponding to the first pipe segment.

[0055] If one of the three sides of the triangular plot is a river, then the sub-catchment area corresponding to the road side of the first pipe segment is determined according to the angle bisector of the end of the first pipe segment that is away from the river.

[0056] If two of the three sides of the triangular plot are adjacent to waterways, then the triangular plot is designated as the sub-catchment area of ​​the first pipe segment corresponding to the side of the road.

[0057] Further, before calculating the number of divisions corresponding to each first pipe segment based on the area of ​​the first catchment area corresponding to each first pipe segment and the preset expected catchment area, and before calculating the area of ​​the second catchment area corresponding to each first pipe segment based on the area of ​​the first catchment area corresponding to each first pipe segment and the number of divisions corresponding to each first pipe segment, the process further includes:

[0058] Determine whether the area of ​​the first catchment area corresponding to the first pipe segment is greater than the preset expected catchment area;

[0059] If so, then the steps of calculating the number of divisions corresponding to each first pipe segment based on the area of ​​the first catchment area corresponding to each first pipe segment and the preset expected catchment area, and calculating the area of ​​the second catchment area corresponding to each first pipe segment based on the area of ​​the first catchment area corresponding to each first pipe segment and the number of divisions corresponding to each first pipe segment are executed.

[0060] As can be seen from the above description, if the area of ​​the first catchment area corresponding to a first pipe segment is less than or equal to the preset expected catchment area, then there is no need to further divide the first pipe segment and its corresponding first catchment area.

[0061] Further, the step of calculating the number of divisions corresponding to each first pipe segment based on the area of ​​the first catchment area corresponding to each first pipe segment and the preset expected catchment area, and calculating the area of ​​the second catchment area corresponding to each first pipe segment based on the area of ​​the first catchment area corresponding to each first pipe segment and the number of divisions corresponding to each first pipe segment, specifically involves:

[0062] Divide the area of ​​the first catchment area corresponding to the first pipe segment by the preset expected catchment area to obtain the quotient value, and round the quotient value to obtain the number of divisions corresponding to the first pipe segment.

[0063] Divide the area of ​​the first catchment area corresponding to the first pipe segment by the number of divisions corresponding to the first pipe segment to obtain the area of ​​the second catchment area corresponding to the first pipe segment.

[0064] The present invention also proposes a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method described above.

[0065] Example 1

[0066] Please refer to Figure 2-9 Embodiment 1 of the present invention is: a method for dividing rainwater pipe sections and their catchment areas, which can be applied to municipal engineering.

[0067] like Figure 2 As shown, it includes the following steps:

[0068] S1: Based on the road intersections, the stormwater pipe network after alignment is initially divided to obtain the first pipe section.

[0069] Since road intersections are often the junctions of major municipal stormwater pipes, inspection well nodes are added at intersections based on the distribution of intersections in the road network, and the pipeline network is initially divided into design sections after the alignment is determined.

[0070] S2: Determine the first catchment area corresponding to each first pipe segment. That is, based on the preliminary division of the design pipe segments in step S1, the catchment area of ​​each design pipe segment is preliminarily divided.

[0071] That is, based on the angle bisectors of the interior angles of the polygonal plots on both sides of the road where each first pipe segment is located, the sub-catchment areas on both sides of the road where each first pipe segment is located are determined; then, based on the sub-catchment areas on both sides of the road where each first pipe segment is located, the first catchment area corresponding to each first pipe segment is determined.

[0072] Specifically, the following steps are performed for each first pipe segment:

[0073] S201: Obtain a polygonal plot of land on one side of the road where a first pipe segment is located. The edges of the polygonal plot include the edge corresponding to the first pipe segment and other edges, including the road edge and the river edge. The straight line containing the road edge is the centerline of the road, and the straight line containing the river edge is the centerline of the river.

[0074] S202: Determine the sub-catchment area on one side of the road corresponding to the first pipe segment based on the angle bisector of the interior angle of the polygonal plot.

[0075] This embodiment uses the most common quadrilateral plot as an example for illustration.

[0076] like Figure 3As shown, since urban roads generally require the installation of stormwater pipes, when a plot of land is surrounded by urban roads, it is assumed that stormwater pipes are distributed all around it. Using the center lines of the surrounding roads as a basis, the angle bisectors of these road center lines are drawn; that is, all four sides of a quadrilateral plot are road sides. In this case, drawing the angle bisectors of the interior angles of the quadrilateral plot yields two sets of triangles, each set containing two opposite triangles. One set of triangles contains two triangles that do not overlap. Figure 3 In the leftmost diagram, connect the vertices of the two triangles to obtain the line connecting the first vertex, as shown below. Figure 3 As shown in the middle and rightmost diagrams, the quadrilateral plot with all four sides adjacent to roads can now be divided into four smaller areas. Then, based on the angle bisectors of the two ends of the first pipe segment and the line connecting the first vertex, the sub-catchment area corresponding to the road side of the first pipe segment is determined. Figure 3 In the rightmost diagram, the quadrilateral plot is divided into two trapezoids and two triangles. The left triangle represents the sub-catchment area corresponding to the first pipe segment on the left, the right triangle represents the sub-catchment area corresponding to the first pipe segment on the right, the upper trapezoid represents the sub-catchment area corresponding to the first pipe segment on the upper, and the lower trapezoid represents the sub-catchment area corresponding to the first pipe segment on the lower.

[0077] When a plot of land is not entirely surrounded by municipal roads, meaning it is not surrounded by drainage pipes on all four sides, for example, when there is a river nearby, such as when the plot is located next to a river... Figure 4 As shown, the main situations include the following:

[0078] a. such as Figure 4 As shown in (a), one side of the plot is a river, that is, one of the four sides of the quadrilateral plot is a river. In this case, the line connecting the first vertex obtained above is extended to the river, and the line connecting the second vertex is obtained. Then, based on the angle bisectors of the two ends of the side opposite to the river and the line connecting the second vertex, the plot can be divided into three small areas, namely two trapezoids and one triangle. The three small areas are the sub-catchment areas corresponding to the first pipe segment of the three road sides of the plot.

[0079] b, such as Figure 4 As shown in (b), the two sides of the opposite side of the plot are waterways, that is, there are two waterway sides among the four sides of the quadrilateral plot and the two waterway sides are opposite each other. In this case, among the two sets of triangles obtained above, select the set of triangles whose bases are both waterway sides, connect the vertices of the two triangles in this set of triangles, and extend them to the two waterway sides respectively to obtain the third vertex line; then according to the third vertex line, the plot can be divided into two small areas, which are respectively used as the sub-catchment areas corresponding to the first pipe segment of the two road sides.

[0080] c. For example Figure 4As shown in (c), the two sides of the plot are adjacent to the river, that is, there are two river sides among the four sides of the quadrilateral plot and the two river sides are adjacent. At this time, according to the angle bisector of the angle between the two road sides, the plot is divided into two small areas, which are respectively the sub-catchment areas corresponding to the first pipe segment of the two road sides.

[0081] d. For example Figure 4 As shown in (d), the plot is bordered by waterways on three sides, meaning that three of the four sides of the quadrilateral plot are bordered by waterways. In this case, the entire quadrilateral plot is directly regarded as the sub-catchment area corresponding to the first pipe segment on the remaining road side.

[0082] Furthermore, when the polygonal plots are of other shapes, the same method as for quadrilateral plots can be used, which is based on dividing the sub-catchment areas corresponding to the first pipe segment along each roadside according to the angle bisector.

[0083] For example, for a triangular plot of land, when all three sides are roads, draw the angle bisectors of the interior angles of the triangle. These three angle bisectors intersect at a single point, the incenter of the triangle. Based on the lines connecting the incenter to the three angles, the triangular plot can be divided into three smaller areas, each serving as a sub-catchment corresponding to the first segment of the pipeline along one of the three roads. When one side is a river, the triangular plot is divided into two smaller areas based on the angle bisector of the included angle between the two road sides, each serving as a sub-catchment corresponding to the first segment of the pipeline along one of the two road sides. When two sides are river sides, the entire triangular plot is directly used as the sub-catchment corresponding to the first segment of the pipeline along the remaining road.

[0084] For other polygonal plots (shapes with 5 or more sides), this is a very rare case in China. However, among pentagonal plots, there is a common situation, such as... Figure 5 As shown, although the plot has five sides, two of them lie on the same straight line, thus forming a quadrilateral. This is equivalent to a road intersection on one side of the quadrilateral plot. In this case, the plot is first divided according to the method for quadrilateral plots. Then, a perpendicular line is drawn from the line connecting the first vertex, and this perpendicular line passes through the intersection between the two sides that lie on the same straight line, thereby further dividing the plot.

[0085] S203: Determine the first catchment area corresponding to the first pipe segment based on the sub-catchment areas on both sides of the road where the first pipe segment is located.

[0086] For each section of road with underground pipes, its catchment area is determined by the number of pipes running along that section of road. For example... Figure 5As shown, when one pipeline is laid under the road, the water catchment area of ​​the pipeline section comes from the plots on both sides of the road. When two pipelines are laid, the water catchment area of ​​the pipeline section comes from one plot. The laying method of more than two pipelines is relatively rare and is often used for special road sections. This embodiment will not discuss it.

[0087] This embodiment uses the laying of one pipeline as an example for illustration. Figure 5 As shown in the diagram on the left, the first catchment area corresponding to the first pipe segment under the middle road is the shaded area in the diagram.

[0088] The catchment area defined by the above steps is often too large to be used directly for design calculations. Therefore, a second division is required.

[0089] S3: Preset desired catchment area.

[0090] The size of the catchment area directly affects the calculation results. If the area is too small, it will result in a large number of design pipe segments, and because the area is small, the calculated pipe diameter at both ends will not change, increasing unnecessary workload. If the area is too large, it will cause discontinuous changes in pipe diameter, and the calculated pipe diameter will not meet the economic requirements. In this embodiment, the expected catchment area s is set to be approximately 2 to 3 hectares.

[0091] S4: Calculate the number of divisions corresponding to each first pipe segment based on the area of ​​the first catchment area corresponding to each first pipe segment and the preset expected catchment area, and calculate the area of ​​the second catchment area corresponding to each first pipe segment based on the area of ​​the first catchment area corresponding to each first pipe segment and the number of divisions corresponding to each first pipe segment.

[0092] Specifically, if the area F of the first catchment area corresponding to a first pipe segment is greater than the expected catchment area s, then the area F of the first catchment area corresponding to the first pipe segment is divided by the expected catchment area s, and then the quotient is rounded to obtain the number of divisions corresponding to the first pipe segment, i.e., N≈F / s.

[0093] Therefore, the area of ​​the second catchment area corresponding to the first pipe section is s' = F / N, where s' is not strictly equal to s.

[0094] If the area F of the first catchment area corresponding to a first pipe segment is less than or equal to the expected catchment area s, then there is no need to further subdivide the first catchment area corresponding to the first pipe segment, and there is no need to break the first pipe segment subsequently.

[0095] S5: Based on the area of ​​the second catchment area corresponding to each first pipe segment, divide the first catchment area corresponding to each first pipe segment into equal areas to obtain the second catchment area corresponding to each first pipe segment.

[0096] That is, based on the area of ​​the second catchment area corresponding to the first pipe segment, the first catchment area corresponding to the first pipe segment is divided into equal areas to obtain each second catchment area corresponding to the first pipe segment.

[0097] Specifically, based on the number of divisions determined in step S4, the first catchment area corresponding to each first pipe segment is further divided. The principles of division are mainly as follows:

[0098] 1. Divide the first catchment area into equal parts based on the area of ​​the second catchment area calculated in step S4.

[0099] 2. The dividing line must be perpendicular to the center line of the road where the first pipe section is located.

[0100] For example, such as Figure 6 As shown, the segmentation effect is demonstrated by taking the single-sided pipe laying method as an example. After the segmentation, the area of ​​the N second catchment areas corresponding to the first pipe segment is s', and the segmentation line is perpendicular to the center line of the road.

[0101] S6: Divide each first pipe segment into two parts based on the intersection of the dividing line corresponding to each first pipe segment and the center line of the road where each first pipe segment is located, to obtain the second pipe segments that correspond one-to-one with each second catchment area.

[0102] That is, based on the intersection of the dividing line and the first pipe segment, the first pipe segment is divided a second time to obtain each second pipe segment corresponding to the first pipe segment. Each second pipe segment corresponds one-to-one with each second catchment area corresponding to each first pipe segment. For example... Figure 7 As shown, a manhole node is added at the intersection of the dividing line and the first pipe segment to break the first pipe segment and obtain the second pipe segment. The second pipe segment and the second catchment area correspond one-to-one.

[0103] Through the above steps, the desired division of the design pipe sections and catchment areas is finally obtained, with each section corresponding to a specific catchment area. The final rendering of the pipe sections and their catchment areas for a certain region is shown below. Figure 8 As shown, this model can be applied to the subsequent design of stormwater pipes in this area. Based on the successful operation of the model, further applications can be carried out, such as pipe network drainage capacity analysis, flooding analysis, and sponge city scheme evaluation.

[0104] This embodiment can improve the efficiency of engineers in dividing the catchment area and the economic rationality of the calculation results when performing rainwater pipe design calculations. It avoids repeated operations when engineers divide the catchment area and design pipe section, and reduces the workload of dividing the catchment area and design pipe section.

[0105] Example 2

[0106] This embodiment is a computer-readable storage medium corresponding to the above embodiments, on which a computer program is stored. When the program is executed by a processor, it implements the various steps of the method for dividing rainwater pipe segments and their catchment areas as described in the above embodiments, and can achieve the same technical effect, which will not be repeated here.

[0107] In summary, the present invention provides a method and storage medium for dividing rainwater pipe segments and their catchment areas, which can solve the problem of repeated adjustments during the design of pipe segments and catchment area division, ensuring that the calculation results of rainwater pipes are more economical and reasonable. It can improve the efficiency of engineers in dividing catchment areas and the economic rationality of calculation results in rainwater pipe design calculations, avoid repeated operations by engineers when dividing catchment areas and design pipe segments, and reduce the workload of dividing catchment areas and design pipe segments.

[0108] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention's specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A method for dividing rainwater pipe sections and their catchment areas, characterized in that, include: Based on the road intersections, the stormwater pipe network after alignment is divided to obtain the first pipe section; Determine the first catchment area corresponding to each first pipe section; Based on the area of ​​the first catchment area corresponding to each first pipe segment and the preset expected catchment area, calculate the number of divisions corresponding to each first pipe segment, and based on the area of ​​the first catchment area corresponding to each first pipe segment and the number of divisions corresponding to each first pipe segment, calculate the area of ​​the second catchment area corresponding to each first pipe segment. Based on the area of ​​the second catchment area corresponding to each first pipe segment, the first catchment area corresponding to each first pipe segment is divided into equal areas to obtain the second catchment area corresponding to each first pipe segment. The dividing line corresponding to each first pipe segment is perpendicular to the center line of the road where it is located, and the straight line where the road edge is located is the center line of the road. Each first pipe segment is divided according to the intersection of the dividing line corresponding to each first pipe segment and the center line of the road where each first pipe segment is located, thus obtaining the second pipe segment that corresponds one-to-one with each second catchment area.

2. The method for dividing rainwater pipe sections and their catchment areas according to claim 1, characterized in that, The determination of the first catchment area corresponding to each first pipe segment specifically involves: Based on the angle bisectors of the interior angles of the polygonal plots on both sides of the road where each first pipe segment is located, the sub-catchment areas on both sides of the road where each first pipe segment is located are determined. Based on the sub-catchment areas on both sides of the road where each first pipe segment is located, determine the first catchment area corresponding to each first pipe segment; The edges of the polygonal plot include the edge corresponding to the first pipe segment and other edges, including road edges and / or river edges, and the straight line containing the river edge is the center line of the river.

3. The method for dividing rainwater pipe sections and their catchment areas according to claim 2, characterized in that, The sub-catchment areas corresponding to each first pipe segment are determined based on the angle bisectors of the interior angles of the polygonal plots on both sides of the road where each first pipe segment is located. Specifically: Obtain a polygonal plot of land on one side of the road where the first pipe segment is located; Based on the angle bisector of the interior angle of the polygonal plot, the sub-catchment area corresponding to one side of the road for the first pipe segment is determined.

4. The method for dividing rainwater pipe sections and their catchment areas according to claim 3, characterized in that, The polygonal plot of land is a quadrilateral plot of land; The step of determining the sub-catchment area on one side of the road corresponding to the first pipe segment based on the angle bisector of the interior angle of the polygonal plot is as follows: If all four sides of the quadrilateral plot are roads, then draw the angle bisectors of the interior angles of the polygon plot to obtain two sets of triangles, each set of triangles including two opposite triangles. Select one set of triangles from the two sets of triangles, where the two triangles in the set of triangles do not overlap, and connect the vertices of the two triangles in the set of triangles to obtain the first vertex line; Based on the angle bisectors at both ends of the first pipe segment and the line connecting the first vertex, the sub-catchment area corresponding to the first pipe segment on one side of the road is determined. If one of the four sides of the quadrilateral plot is a riverbank and the riverbank is adjacent to the side corresponding to the first pipe segment, then the line connecting the first vertices is extended to the riverbank to obtain the line connecting the second vertices. The sub-catchment area corresponding to the road side of the first pipe segment is determined based on the angle bisector of the end of the first pipe segment that is away from the river side and the line connecting the second vertex. If one of the four sides of the quadrilateral plot is a river side and the river side is opposite to the side corresponding to the first pipe segment, then the sub-catchment area of ​​the first pipe segment corresponding to the road side is determined according to the angle bisectors at both ends of the side corresponding to the first pipe segment. If two of the four sides of the quadrilateral plot are river sides and both of the river sides are adjacent to the side corresponding to the first pipe segment, then connect the vertices of the two triangles in the two sets of triangles whose bases are both river sides, and extend them to the two river sides respectively to obtain the third vertex line. Based on the line connecting the third vertices, the sub-catchment area on one side of the road corresponding to the first pipe segment is determined; If there are two river sides among the four sides of the quadrilateral plot, and one of the two river sides is adjacent to the side corresponding to the first pipe segment, and the other river side is opposite to the side corresponding to the first pipe segment, then the sub-catchment area corresponding to the road side of the first pipe segment is determined according to the angle bisector of the end of the side corresponding to the first pipe segment away from the river side. If three of the four sides of the quadrilateral plot are river sides, then the quadrilateral plot is designated as the sub-catchment area of ​​the first pipe segment corresponding to the side of the road.

5. The method for dividing rainwater pipe sections and their catchment areas according to claim 3, characterized in that, The polygonal plot of land is a triangular plot of land; The step of determining the sub-catchment area on one side of the road corresponding to the first pipe segment based on the angle bisector of the interior angle of the polygonal plot is as follows: If all three sides of the triangular plot are road sides, then the sub-catchment area corresponding to the road side of the first pipe segment is determined based on the angle bisectors at both ends of the side corresponding to the first pipe segment. If one of the three sides of the triangular plot is a river, then the sub-catchment area corresponding to the road side of the first pipe segment is determined according to the angle bisector of the end of the first pipe segment that is away from the river. If two of the three sides of the triangular plot are adjacent to waterways, then the triangular plot is designated as the sub-catchment area of ​​the first pipe segment corresponding to the side of the road.

6. The method for dividing rainwater pipe sections and their catchment areas according to claim 1, characterized in that, Before calculating the number of divisions corresponding to each first pipe segment based on the area of ​​the first catchment area corresponding to each first pipe segment and the preset expected catchment area, and before calculating the area of ​​the second catchment area corresponding to each first pipe segment based on the area of ​​the first catchment area corresponding to each first pipe segment and the number of divisions corresponding to each first pipe segment, the method further includes: Determine whether the area of ​​the first catchment area corresponding to the first pipe segment is greater than the preset expected catchment area; If so, then the steps of calculating the number of divisions corresponding to each first pipe segment based on the area of ​​the first catchment area corresponding to each first pipe segment and the preset expected catchment area, and calculating the area of ​​the second catchment area corresponding to each first pipe segment based on the area of ​​the first catchment area corresponding to each first pipe segment and the number of divisions corresponding to each first pipe segment are executed.

7. The method for dividing rainwater pipe sections and their catchment areas according to claim 1, characterized in that, The process involves calculating the number of divisions corresponding to each first pipe segment based on the area of ​​the first catchment area corresponding to each first pipe segment and the preset desired catchment area, and then calculating the area of ​​the second catchment area corresponding to each first pipe segment based on the area of ​​the first catchment area corresponding to each first pipe segment and the number of divisions corresponding to each first pipe segment. Specifically: Divide the area of ​​the first catchment area corresponding to the first pipe segment by the preset expected catchment area to obtain the quotient value, and round the quotient value to obtain the number of divisions corresponding to the first pipe segment. Divide the area of ​​the first catchment area corresponding to the first pipe segment by the number of divisions corresponding to the first pipe segment to obtain the area of ​​the second catchment area corresponding to the first pipe segment.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the method as described in any one of claims 1-7.

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