Method and device for evaluating pipeline coverage rate and pipeline drainage capacity

Abstract

The invention provides a pipeline coverage rate and pipeline drainage capacity evaluation method and device, and belongs to the technical field of data processing, and the method comprises the steps: determining a first center line buffer layer according to the road network data of a drainage unit, and determining an effective road network center line length together with a pipeline data layer; determining the pipeline coverage rate according to the effective road center line length and the actual road center line length, and determining the comprehensive drainage capacity according to the theoretical drainage capacity and the physical drainage capacity of the target drainage unit. According to the method, the accuracy of coverage rate statistics is enhanced by analyzing the length of the effective road center line covered by the pipeline, the theoretical drainage capacity of the drainage unit is evaluated by adopting numerical simulation and the pipe section service area proportion, and the comprehensive drainage capacity of the drainage unit is determined after the physical drainage capacity is obtained by combining pipeline construction age limit information. The drainage capacity of the pipeline and the drainage unit can be scientifically and reasonably reflected from the two dimensions of hydraulic performance and structural attributes, and more scientific and reasonable technical support can be provided for perfection and updating of an urban drainage pipe network system.

Description

Technical Field

[0001] The present invention relates to the technical field of data processing, and in particular to a method and device for evaluating pipeline coverage and pipeline drainage capacity. Background Art

[0002] In municipal planning, construction and management, it is very important to do a good job in statistics, analysis and evaluation of the current municipal pipelines in order to formulate scientific and reasonable municipal planning results.

[0003] Common evaluation indicators for municipal pipelines include pipeline coverage rate, pipeline drainage capacity, etc. Evaluation methods include model analysis and statistical analysis. How to use scientific means to reasonably analyze the current level of municipal facility construction can provide a good working foundation for subsequent municipal planning work, and can also clarify the focus of the next stage of work for urban builders and managers, improve investment efficiency and benefits, and solve the problem of facility shortcomings in a targeted manner.

[0004] The existing technical system has established a variety of calculation methods for municipal pipeline assessment, but the rationality and scientificity of the methods need to be improved, and there is a lack of effective solutions. Summary of the invention

[0005] The present invention provides a method and device for evaluating pipeline coverage and pipeline drainage capacity, which are used to solve the defects of the prior art in calculating pipeline coverage, which is to reflect the coverage by statistically analyzing the ratio of the overall construction of pipelines to the length of implemented roads, and easily misjudge the actual pipeline coverage. In terms of pipeline drainage capacity evaluation, the pipeline drainage capacity is only evaluated from the hydraulic conditions, ignoring the influence of the pipeline's own attributes on the pipeline service level, and the problem that the analysis results are easily deviated from the actual situation.

[0006] The present invention provides a pipeline coverage evaluation method, comprising the following steps: Determine a road centerline layer according to the road network data of the drainage unit, wherein the road centerline layer is composed of geometric center lines of all roads in the drainage unit; Determine a first centerline buffer layer corresponding to the road centerline layer, wherein the first centerline buffer layer is determined according to a first buffer width corresponding to the geometric centerline of each road; Determining an effective road network centerline length based on the first centerline buffer layer and the pipeline data layer of the drainage unit; The pipe coverage rate of the drainage unit is determined according to the effective road network centerline length and the actual road centerline length that has been planned.

[0007] According to the pipeline coverage evaluation method provided by the present invention, the determining of the first centerline buffer layer corresponding to the road centerline layer includes: Determining the road grade attribute of each road in the first centerline buffer layer according to the road network data; According to the different first buffer widths corresponding to the different road grade attributes, the first buffer width corresponding to the geometric center line of each road is determined, and the first centerline buffer layer is constructed.

[0008] According to the pipeline coverage evaluation method provided by the present invention, determining the effective road network centerline length based on the first centerline buffer layer and the pipeline data layer of the drainage unit includes: Determine an intersection analysis layer between the first centerline buffer layer and the pipeline data layer of the drainage unit, wherein the intersection analysis layer is composed of a portion of the first centerline buffer layer that intersects with the pipeline data layer; The total length of the road centerline corresponding to the part of the first centerline buffer layer is counted as the effective road network centerline length.

[0009] According to the pipeline coverage evaluation method provided by the present invention, the pipeline coverage is determined based on the ratio between the effective road network centerline length and the actual road centerline length.

[0010] The present invention also provides a method for evaluating the drainage capacity of a pipeline, comprising the following steps: Determine the pipeline coverage rate in the area to be evaluated based on any of the above pipeline coverage rate evaluation methods, and set each drainage unit whose pipeline coverage rate is greater than a first preset threshold as a target drainage unit; Determining the theoretical drainage capacity of each of the target drainage units; Determining the physical drainage capacity of each target drainage unit according to the determined pipeline construction age information of each target drainage unit; Determining the comprehensive drainage capacity of each of the target drainage units according to the theoretical drainage capacity and the physical drainage capacity of each of the target drainage units; According to the comprehensive drainage capacity of all the target drainage units in the area to be evaluated, the pipeline drainage capacity evaluation information in the area to be evaluated is determined.

[0011] According to the pipeline drainage capacity evaluation method provided by the present invention, the determining of the theoretical drainage capacity of each target drainage unit includes: Obtain the drainage capacity and service area ratio of each pipe section in the target drainage unit, where the service area ratio is the ratio between the actual service area of ​​the pipe section and the total service area of ​​the target drainage unit; Sorting all pipe sections according to the order of drainage capacity from large to small to obtain a pipe section sequence of the target drainage unit; Accumulating the service area proportions of the first N pipe segments in the pipe segment sequence in sequence, and comparing the obtained service area combined proportion with a second preset threshold; If the combined service area ratio is less than the second preset threshold, set N=N+1, and obtain a new combined service area ratio again, until it is determined that the combined service area ratio is greater than or equal to the second preset threshold, where N is a positive integer; The final drainage capacity of the Nth pipe segment is set as the physical drainage capacity of the target drainage unit.

[0012] According to the pipeline drainage capacity evaluation method provided by the present invention, the pipeline construction age information of each target drainage unit is determined based on the following steps: Determine all building units within the target drainage unit, and determine the building construction age information of the building units; Acquire a second centerline buffer layer of the road centerline layer of the target drainage unit, where the second centerline buffer layer is determined according to a second buffer width corresponding to a geometric centerline of each road in the target drainage unit, and the second buffer width is greater than the first buffer width; Determine a target building unit located on the second centerline buffer layer in the target drainage unit according to an intersection analysis result of all building units in the target drainage unit and the second centerline buffer layer; Determine the road construction age information according to the building construction age information of the target building unit; The road construction age information is used as the pipeline construction age information to assign a value to the physical drainage capacity of the target drainage unit.

[0013] According to the pipeline drainage capacity evaluation method provided by the present invention, if it is determined based on the pipeline construction age information that the older the pipeline construction age in the target drainage unit is, the smaller the value assigned to the physical drainage capacity will be.

[0014] According to the pipeline drainage capacity evaluation method provided by the present invention, the comprehensive drainage capacity is determined based on the product of the theoretical drainage capacity and the physical drainage capacity.

[0015] The present invention also provides a pipeline coverage evaluation device, comprising the following modules: A road centerline determination unit, used to determine a road centerline layer according to the road network data of the drainage unit, wherein the road centerline layer is composed of geometric centerlines of all roads in the drainage unit; A centerline buffer layer determination unit, used to determine a first centerline buffer layer corresponding to the road centerline layer, wherein the first centerline buffer layer is determined according to a first buffer width corresponding to the geometric centerline of each road; A pipeline length determination unit, configured to determine an effective road network centerline length based on the first centerline buffer layer and the pipeline data layer of the drainage unit; The coverage calculation unit is used to determine the pipe coverage of the drainage unit according to the effective road network centerline length and the actual road centerline length that has been planned.

[0016] The present invention also provides a pipeline drainage capacity assessment device, comprising the following modules: A drainage unit screening unit, used for running any of the above pipeline coverage rate assessment methods to determine the pipeline coverage rate in the area to be assessed, and setting each drainage unit whose pipeline coverage rate is greater than a first preset threshold as a target drainage unit; A theoretical drainage capacity evaluation unit, used to determine the theoretical drainage capacity of each of the target drainage units; A physical drainage capacity evaluation unit, used to determine the physical drainage capacity of each target drainage unit according to the determined pipeline construction age information of each target drainage unit; a comprehensive drainage capacity determination unit, configured to determine the comprehensive drainage capacity of each of the target drainage units according to the theoretical drainage capacity and the physical drainage capacity of each of the target drainage units; The pipeline capacity comprehensive evaluation unit is used to determine the pipeline drainage capacity evaluation information in the area to be evaluated according to the comprehensive drainage capacity of all the target drainage units in the area to be evaluated.

[0017] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the method for evaluating pipeline coverage or pipeline drainage capacity as described above is implemented.

[0018] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements any of the above-mentioned methods for evaluating pipeline coverage or pipeline drainage capacity.

[0019] The present invention also provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the computer program implements any of the above-mentioned pipeline coverage or pipeline drainage capacity assessment methods.

[0020] The present invention provides a method and device for evaluating pipeline coverage and pipeline drainage capacity. The present invention enhances the accuracy of coverage statistics by analyzing the effective road centerline length covered by the pipeline, adopts numerical simulation and the proportion of service area of ​​the pipe section to evaluate the theoretical drainage capacity of the drainage unit, and after obtaining the physical drainage capacity in combination with the information of the pipeline construction years, determines the comprehensive drainage capacity of the drainage unit. The drainage capacity of the pipeline and the drainage unit can be scientifically and reasonably reflected from the two dimensions of hydraulic performance and structural properties, and can provide more scientific and reasonable technical support for the improvement and updating of the urban drainage pipe network system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is one of the flow charts of the pipeline coverage evaluation method provided by the present invention.

[0023] Figure 2 This is the second flow chart of the pipeline coverage evaluation method provided by the present invention.

[0024] Figure 3 It is one of the flow charts of the pipeline drainage capacity evaluation method provided by the present invention.

[0025] Figure 4 This is the second flow chart of the pipeline drainage capacity evaluation method provided by the present invention.

[0026] Figure 5 It is a structural schematic diagram of the pipeline coverage evaluation device provided by the present invention.

[0027] Figure 6 It is a structural schematic diagram of the pipeline drainage capacity evaluation device provided by the present invention.

[0028] Figure 7 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that, in the description of the present invention, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "include one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements. The orientation or positional relationship indicated by the terms "upper", "lower", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0031] The terms "first", "second", etc. in the present invention are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present invention can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" means at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0032] There are few studies on the method of calculating pipe coverage, but there are many results on the evaluation method of drainage network capacity, such as: The main idea of ​​the currently commonly used method for obtaining pipeline drainage capacity based on model simulation analysis is to conduct simulations under different recurrence periods by establishing a one-dimensional pipe network model such as MIKE URBAN, and then use the simulation results to evaluate the drainage capacity of the test area.

[0033] Among them, the pipe return period is mainly used to evaluate the drainage capacity of the drainage network under specific rainfall events. It helps determine whether the pipeline can effectively cope with rainfall of different frequencies, thereby preventing drainage problems such as waterlogging. The pipe return period is not a value directly obtained through calculation, but is determined through simulation analysis based on historical rainfall data and future rainfall forecasts, combined with the design standards and objectives of the drainage system. Specifically, it involves using tools such as the MIKE URBAN one-dimensional pipe network model to simulate the drainage of the pipeline under different rainfall return periods (such as once in 2 years, once in 5 years, etc.) to evaluate whether the drainage capacity of the pipeline system meets the design requirements. This process requires comprehensive consideration of multiple factors such as rainfall intensity, duration, pipe size, flow rate, etc.

[0034] The existing technology also has methods for analyzing the capacity of the existing urban rainwater drainage network and the risk of urban flooding through the urban rainwater simulation software Infoworks ICM.

[0035] In addition, there is currently a method for evaluating the drainage capacity of a pipeline by calculating the hydraulic performance index and improving it into a comprehensive hydraulic performance index. Specifically, the comprehensive hydraulic performance index is obtained by weighted calculation of the maximum global hydraulic performance index, the maximum self-hydraulic performance index and the cumulative hydraulic performance index, thereby reflecting the degree of overload of the pipeline itself and the impact of this section of the pipeline on the overload of the upstream pipeline.

[0036] At present, other methods for evaluating pipeline drainage capacity mostly use numerical model simulation, which will not be elaborated here.

[0037] However, a specific analysis shows that the method of obtaining the pipeline drainage capacity based on the model simulation analysis method and the method of analyzing the existing urban rainwater drainage network capacity and urban waterlogging risk through urban rainwater simulation software both consider obtaining the pipeline drainage capacity of urban built-up areas through numerical simulation. It is one of the most commonly used methods for estimating pipeline capacity, but does not provide a method for calculating the pipeline capacity divided into drainage units, and only analyzes the pipeline capacity from the perspective of pipeline hydraulic performance, without considering the structural and functional properties of the pipeline, which is prone to misjudgment.

[0038] The method of evaluating the drainage capacity of pipelines through comprehensive hydraulic performance index is actually a hydraulic performance index based on the improvement of the Bernoulli equation for non-steady flow, which uses pipeline liquid level as the evaluation standard. This index is a comprehensive evaluation indicator that takes into account the overload degree of the pipeline itself and the impact of the downstream pipeline on the overload of the upstream pipeline. From the theoretical analysis, it considers the impact of the liquid level of different pipe sections on the upstream pipe section. Its theoretical basis is relatively complete, but it is too theoretical. It has poor practicality at the engineering management level and is not convenient for management personnel to use. It has high data requirements, requires detailed pipeline information and parameters, and is not convenient for statistical analysis at the drainage unit scale.

[0039] In summary, the existing pipeline coverage rate is often evaluated by analyzing the length of the pipeline in a drainage unit and the proportion of the pipeline to the length of the implemented roads in the region. In pipeline capacity analysis, managers usually use software tools to characterize pipeline capacity and conduct simulation evaluation. Specifically, by collecting detailed land use / land cover conditions, ground elevation conditions and given rainfall scenarios, a numerical model is established to evaluate the service capacity of each pipe section. In terms of pipeline coverage calculation, the coverage rate is reflected by statistically analyzing the ratio of the overall construction of pipelines to the length of implemented roads, which is easy to misjudge the actual pipeline coverage rate. This is because the road grades are different, and some roads need to set up rainwater pipes on both sides of the road. There are often "multiple pipes on one road", so the total length of the pipeline is used to estimate the implementation rate. Errors are prone to occur. The traditional method of using numerical models to evaluate pipeline capacity can reflect the pipeline capacity of different pipe sections, but it does not give a comprehensive evaluation of the pipeline capacity within a certain management unit (such as a drainage unit). The pipeline capacity is only evaluated from the hydraulic conditions, which lacks consideration of structural factors such as the degree of pipeline aging, and ignores the impact of the pipeline's own properties on the pipeline service level. The final analysis results are easy to deviate from the actual situation.

[0040] In view of this, the present invention provides a new method and device for evaluating pipeline coverage and pipeline drainage capacity, which can overcome the above-mentioned deficiencies in the prior art to a certain extent. Figure 1-Figure 7 Give a detailed description.

[0041] Generally speaking, municipal pipelines are required to be laid below municipal roads, and can be located under motor vehicle lanes, non-motor vehicle lanes or pedestrian walkways. For special sections of roads that are limited by the tight underground space of municipal roads, pipelines will be laid in roadside green spaces at an appropriate distance. Due to the characteristics of pipelines being laid along the road, generally speaking, the general implementation of underground pipelines can be clarified by counting the length of implemented roads.

[0042] The pipeline coverage rate assessment method based on road network analysis provided by the present invention utilizes the characteristic of "pipelines following each other" to establish a pipeline network coverage rate analysis method based on statistical pipeline coverage under the road. Specifically, by determining the effective road network centerline length of the implemented municipal pipeline and comparing it with the actual road centerline length of the implemented plan, a more scientific and reasonable pipeline network coverage rate calculation can be achieved.

[0043] Figure 1 is one of the flow charts of the pipeline coverage evaluation method provided by the present invention, such as Figure 1 As shown, including but not limited to the following steps: Step 101, determining the road centerline layer according to the road network data of the drainage unit.

[0044] A drainage unit refers to a drainage system that discharges into a river through multiple pipes connected from upstream to downstream. Each pipe has a certain drainage basin range and they work together to ensure smooth drainage.

[0045] First, it is necessary to obtain the road network data of the drainage unit, for example, from the relevant national geographic census database. The road network data includes the geometric shape (such as the road centerline represented by lines) and attribute information (such as road grade, name, etc.) of all roads in the drainage unit.

[0046] These road network data usually exist in the form of Geographic Information System (GIS) data, so you can use specialized GIS software (such as ArcGIS) to open the acquired road network data.

[0047] Then, the center lines of the roads can be extracted through the tools in ArcGIS to form a road centerline layer. The road centerline layer is a collection of geometric center lines of all roads in the drainage unit, representing the geometric position of the roads, providing a basis for subsequent spatial analysis.

[0048] Step 102: determine a first centerline buffer layer corresponding to the road centerline layer, wherein the first centerline buffer layer is determined according to a first buffer width corresponding to the geometric centerline of each road.

[0049] Among them, the first buffer width refers to the width used to create a buffer zone determined according to factors such as road grade attributes. The present invention introduces the feature of the first buffer width because the road is not just a line, it also has a certain width and influence range. When calculating the pipeline coverage rate, if only the center line of the road is considered, the actual influence area on both sides of the road may be ignored. By introducing the first buffer width, the impact of the road and its surrounding areas on the pipeline coverage can be more accurately reflected. If the center line of the road is used directly to evaluate the coverage rate, errors may occur because the center line of the road cannot fully represent the actual position of the road and the coverage range of the road. By adding a spatial buffer width, this error can be reduced to a certain extent, making the calculation result closer to the actual situation.

[0050] The first buffer width can be predetermined based on factors such as road grade attributes. The principle of determination is the minimum width that should be achieved between road land boundary lines in order to meet traffic, safety and other functional requirements.

[0051] The first buffer width can be determined based on comprehensive considerations of factors such as road grade, traffic flow, and surrounding space characteristics to achieve the minimum width between road land boundaries that meets traffic, safety, and other functional requirements. For example, a larger first buffer width is required for urban trunk roads due to large traffic flow and tight surrounding space; while a relatively smaller first buffer width can be set for urban secondary trunk roads and branch roads.

[0052] Then, using the spatial analysis function of ArcGIS, a corresponding spatial buffer was created for the geometric centerline of each road according to the determined first buffer width to form the first centerline buffer layer.

[0053] Step 103, determining the effective road network centerline length based on the first centerline buffer layer and the pipeline data layer of the drainage unit.

[0054] The pipeline data layer refers to the database containing the geometric shapes and attribute information of all pipelines in the drainage unit, and the effective road network centerline length refers to the length of the road centerline covered by the pipeline located in the road buffer zone.

[0055] Specifically, the present invention first retrieves the pipeline data layer of the drainage unit, which should contain the geometric shape of the pipeline (such as the pipeline direction represented by the lines) and attribute information (such as the pipeline diameter, material, etc.), and then uses ArcGIS's spatial analysis tool to perform an intersection analysis (such as INTERSECT analysis) on the first centerline buffer layer and the pipeline data layer. The result of the intersection analysis will generate a new layer, which contains the pipeline part that intersects with the first centerline buffer layer.

[0056] The centerline lengths of all roads marked as "pipelines" are extracted from the results of the intersection analysis, which is the effective road network centerline length. The effective road network centerline length represents the centerline length of the road covered by the pipes located in the road buffer zone, which effectively reflects the coverage of the pipes of the drainage unit in the road buffer zone.

[0057] Step 104, determining the pipe coverage rate of the drainage unit according to the effective road network centerline length and the actual road centerline length that has been planned.

[0058] After determining the effective road network centerline length, it is necessary to obtain the actual road centerline length of the implemented plan, which represents the total length of the roads that have implemented the road network planning within the drainage unit.

[0059] The statistical function of GIS software can be used to extract the total length of all road centerlines in the road network data as the actual road centerline length.

[0060] Then, the effective road network centerline length is compared with the actual road centerline length to obtain the pipeline coverage rate, which represents the current coverage degree of the pipeline in the realized road network planning roads.

[0061] Compared with the existing pipeline coverage estimation method and pipeline capacity assessment method, the pipeline coverage assessment method provided by the present invention can effectively enhance the accuracy of coverage statistics by analyzing the effective road network centerline length covered by the pipeline, and provides a more scientific, reasonable and easy-to-operate statistical method for management decision-makers.

[0062] Based on the content of the above embodiment, as an optional embodiment, the present invention further provides a specific implementation method for determining the first centerline buffer layer corresponding to the centerline layer of the road, which mainly includes: Determining the road grade attribute of each road in the first centerline buffer layer according to the road network data; According to the different first buffer widths corresponding to the different road grade attributes, the first buffer width corresponding to the geometric center line of each road is determined, and the first centerline buffer layer is constructed.

[0063] Figure 2 This is the second flow chart of the pipeline coverage evaluation method provided by the present invention, such as Figure 2 As shown, firstly, the road network data related to the drainage unit to be analyzed is retrieved from the database related to the national geographic census, and the road centerline layer in the road network data is extracted.

[0064] Then, the road grade attributes of each road related to the drainage unit are determined based on the road network data. The road grade attributes are mainly divided according to factors such as traffic flow, design speed, and function of the road, such as urban expressways, urban trunk roads, urban secondary trunk roads, and urban branch roads.

[0065] The different first buffer widths corresponding to each road are determined according to the road grade attributes of different roads. For example, the first buffer width of urban expressways can be set to 65 meters, the first buffer width of urban trunk roads can be set to 40 meters, and the first buffer width of urban secondary roads and urban branch roads can be set to 30 meters.

[0066] After determining the first buffer width corresponding to the geometric center line of each road, the spatial analysis function of the GIS software can be used to create a corresponding spatial buffer zone for the geometric center line of each road, thereby constructing a first centerline buffer layer. For example, a centerline buffer layer is constructed from the geometric center line to both sides of the road with a width of 0.5 times the first buffer.

[0067] The pipeline coverage rate evaluation method provided by the present invention scientifically and reasonably determines the first centerline buffer layer corresponding to the road centerline layer by introducing the road grade attributes of different roads, which provides important data support for the subsequent pipeline coverage rate calculation method based on road network analysis, greatly improves the accuracy and objectivity of pipeline coverage rate calculation, and provides more scientific and reasonable technical support for municipal planning and management.

[0068] Based on the content of the above embodiment, as an optional embodiment, the above determination of the effective road network centerline length based on the first centerline buffer layer and the pipeline data layer of the drainage unit specifically includes but is not limited to: Determine an intersection analysis layer between the first centerline buffer layer and the pipeline data layer of the drainage unit, wherein the intersection analysis layer is composed of a portion of the first centerline buffer layer that intersects with the pipeline data layer; The total length of the road centerline corresponding to the part of the first centerline buffer layer is counted as the effective road network centerline length.

[0069] In the planning and management of urban drainage systems, the determination of the effective network centerline length is crucial for evaluating pipe coverage, pipe drainage capacity, optimizing pipe layout, and predicting potential drainage problems. By accurately calculating the effective network centerline length directly related to the drainage unit, the coverage of the drainage unit can be evaluated more accurately.

[0070] Continue to refer Figure 2 As shown, the spatial analysis tools of GIS software (such as INTERSECT) can be used to perform intersection analysis on the first centerline buffer layer (i.e., the buffer generated according to the road centerline, used to expand the analysis scope to include possible drainage pipes) and the pipe data layer of the drainage unit to identify those road centerline parts that are directly related to the drainage pipes, that is, those parts that are located in the first centerline buffer layer and intersect with the pipe data layer.

[0071] The INTERSECT analysis tool in the GIS software can automatically identify and extract the overlapping area between the first centerline buffer layer and the pipeline data layer. In this embodiment, the overlapping area is the intersection analysis layer, which includes all road centerline buffer portions directly related to the drainage pipeline.

[0072] Next, the total length of the road centerline corresponding to the first centerline buffer layer of all parts in the intersection analysis layer is counted and recorded as the effective road network centerline length. This step can be achieved by measuring the length of each feature in the intersection analysis layer (that is, each road centerline segment that intersects the drainage pipe) and accumulating these length values.

[0073] The pipeline coverage evaluation method provided by the present invention can not only accurately calculate the effective road network centerline length, but also intuitively show which road centerlines are directly related to the drainage system, thereby providing strong data support for subsequent drainage system optimization and planning. It has a high degree of automation and can significantly improve work efficiency and accuracy.

[0074] Based on the content of the above embodiment, as an optional embodiment, the pipeline coverage rate is determined according to the ratio between the effective road network centerline length and the actual road centerline length, that is, the final pipeline coverage rate = effective road network centerline length / actual road centerline length.

[0075] The existing technology usually obtains the pipeline recurrence period results from the theoretical level as the drainage capacity evaluation result of the pipeline. In scientific research, the pipeline drainage capacity obtained based on the model analysis method can only be used as the theoretical drainage capacity of the pipeline capacity.

[0076] The pipeline capacity assessment method based on drainage units provided by the present invention utilizes model tools, ArcGIS spatial analysis tools and Internet big data, combines the theoretical drainage capacity and physical drainage capacity of pipelines and drainage units, realizes the coupling of theory and actual situation, and improves the accuracy of pipeline drainage capacity assessment results, which is mainly reflected in the following two improved features: 1) Taking full account of the pipeline coverage results, the drainage units whose pipeline coverage is not less than the first preset threshold are selected as drainage units with basically qualified pipeline laying density, and then enter the pipeline capacity assessment stage.

[0077] 2) Combined with the information of pipeline construction age, the hidden danger degree of pipeline is analyzed, and the actual physical drainage capacity of pipeline is analyzed in a step-by-step manner according to the age of pipeline construction from new to old. The physical drainage capacity is used to correct the loss degree of theoretical drainage capacity, so as to obtain the comprehensive drainage capacity of the drainage unit.

[0078] Figure 3 This is one of the flow charts of the pipeline drainage capacity evaluation method provided by the present invention, such as Figure 3 As shown, it mainly includes but is not limited to the following steps: Step 301, using the pipeline coverage evaluation method provided by any of the above embodiments, determine the pipeline coverage of each drainage unit in the area to be evaluated, and set each drainage unit with a pipeline coverage greater than a first preset threshold as a target drainage unit.

[0079] Specifically, the geographical information, pipeline layout and length data of all drainage units in the area to be evaluated can be collected, and the pipeline coverage rate of each drainage unit can be calculated. Then, by setting a first preset threshold, such as 60%, the drainage units with pipeline coverage rates exceeding this threshold are marked as target drainage units. These target drainage units are considered to be the key part of evaluating the drainage capacity of the entire area because of their high pipeline coverage rates.

[0080] Step 302: determine the theoretical drainage capacity of each of the target drainage units.

[0081] Generally speaking, theoretical drainage capacity refers to the maximum drainage efficiency that a pipeline system can achieve based on factors such as pipeline design standards, pipe diameter, and material, without considering actual physical limitations such as aging and blockage. For each target drainage unit, its theoretical drainage capacity can be calculated based on its pipeline design parameters using professional hydraulic calculation software or formulas.

[0082] However, when calculating the theoretical drainage capacity of the target drainage unit, the present invention may have multiple pipe sections in one target drainage unit, and each pipe section has a different drainage capacity. For example, drainage unit S is a drainage unit that discharges into a river channel and is composed of three pipes a, b, and c connected from upstream to downstream. The corresponding recurrence period of pipe a is once in 2 years, the corresponding recurrence period of pipe b is once in 3 years, and the corresponding recurrence period of pipe c is once in 5 years. At this time, it is difficult to determine the theoretical drainage capacity of the entire drainage unit using a conventional method.

[0083] In this embodiment, the theoretical drainage capacity of the entire pipeline is determined by comprehensively considering the drainage capacity and service area ratio of each pipeline.

[0084] Step 303: Determine the physical drainage capacity of the target drainage unit according to the determined pipeline construction age information of each target drainage unit.

[0085] The physical drainage capacity in the present invention fully considers the influence of factors such as aging, deposition, and damage of the pipeline in actual use on the drainage efficiency. For example, the actual operating status of the pipeline can be comprehensively evaluated by collecting the pipeline construction age information of each target drainage unit, combining historical maintenance records, on-site survey results and other information, that is, using this information to calculate.

[0086] Step 304: Determine the comprehensive drainage capacity of each of the target drainage units according to the theoretical drainage capacity and the physical drainage capacity of each of the target drainage units.

[0087] The comprehensive drainage capacity is the result of comprehensive consideration of the theoretical drainage capacity and the physical drainage capacity, which not only takes into account the ideal state of pipeline design, but also reflects the constraints in actual use. In specific implementation, the weighted average method or other appropriate mathematical models can be used to combine the theoretical drainage capacity and the physical drainage capacity to obtain the comprehensive drainage capacity value of each target drainage unit.

[0088] Step 305: Determine pipeline capacity assessment information in the area to be assessed based on the comprehensive drainage capacity of all the target drainage units in the area to be assessed.

[0089] Finally, by summarizing and analyzing the comprehensive drainage capacity of all target drainage units in the area to be evaluated, the pipeline drainage capacity evaluation information of the entire area to be evaluated is obtained. This pipeline drainage capacity evaluation information may include quantitative indicators of the overall drainage capacity of the area, relative differences between the target drainage units, identification of potential drainage bottleneck areas, and distribution of the drainage units whose pipeline coverage is less than or equal to the first preset threshold that were screened out in step 301.

[0090] The pipeline drainage capacity assessment method provided by the present invention screens the target drainage units whose coverage rate basically meets the standard, then uses numerical simulation to obtain the theoretical drainage capacity of the pipe section, and evaluates the theoretical drainage capacity of the drainage unit based on the proportion of the service area of ​​the pipe section. After further combining the physical drainage capacity with information such as the service life of the pipeline, the comprehensive drainage capacity of the drainage unit is obtained. The method can more scientifically and reasonably reflect the drainage capacity of the pipeline and the drainage unit from the two dimensions of hydraulic performance and structural properties, which is conducive to improving the scientific nature of drainage network construction decisions.

[0091] Based on the content of the above embodiment, as an optional embodiment, the determination of the theoretical drainage capacity of each target drainage unit mentioned in the above embodiment specifically includes but is not limited to the following steps: Obtain the drainage capacity and service area ratio of each pipe section in the target drainage unit, where the service area ratio is the ratio between the actual service area of ​​the pipe section and the total service area of ​​the target drainage unit; Sorting all pipe sections according to the order of drainage capacity from large to small to obtain a pipe section sequence of the target drainage unit; Accumulating the service area proportions of the first N pipe segments in the pipe segment sequence in sequence, and comparing the obtained service area combined proportion with a second preset threshold; If the combined service area ratio is less than the second preset threshold, set N=N+1, and obtain a new combined service area ratio again, until it is determined that the combined service area ratio is greater than or equal to the second preset threshold, where N is a positive integer; The final drainage capacity of the Nth pipe segment is set as the physical drainage capacity of the target drainage unit.

[0092] Figure 4 This is the second flow chart of the pipeline drainage capacity evaluation method provided by the present invention, such as Figure 4 As shown, it mainly includes the following steps: First, for each target drainage unit, detailed data of all the pipe sections within it are collected and organized, including the drainage capacity of each pipe section (i.e., the maximum water flow that the pipe section can handle under ideal conditions) and the service area (i.e., the area of ​​the geographical area directly served by the pipe section).

[0093] Subsequently, the service area ratio of each pipe segment is calculated, which is the ratio between the service area of ​​the pipe segment and the total service area of ​​the target drainage unit.

[0094] Next, each pipe segment can be sorted from largest to smallest according to its drainage capacity to form an ordered sequence of pipe segments to help identify those pipe segments with higher drainage efficiency, so that they can be given priority in subsequent analysis.

[0095] Still taking the drainage unit S in the above embodiment as an example, assuming that the basin area of ​​the drainage unit S is A, the corresponding recurrence period of pipe a is once in 2 years, and the pipe service area is 20%A; the corresponding recurrence period of pipe b is once in 3 years, and the pipe service area is 50%A; the corresponding recurrence period of pipe c is once in 5 years, and the pipe service area is 30%A.

[0096] Then the pipe section sequence after further sorting is [c, once in 5 years, 30%A; b, once in 3 years, 50%A; c, once in 2 years, 20%A].

[0097] Then, the service area ratios of the first N pipe sections in the pipe section sequence are accumulated in turn to obtain a combined service area ratio. This ratio reflects the proportion of the area served by the first N pipe sections to the total service area of ​​the target drainage unit.

[0098] Assuming that the second preset threshold is 70%, according to the above method, first set N=1 and take the first pipe c in the pipe section sequence. However, since the service area of ​​pipe c with a recurrence period of 5 years in drainage unit S accounts for only 30%, it is necessary to set N=2, and further add the service area of ​​pipe b with a recurrence period of 3 years (because pipe c with a recurrence period of 5 years can obviously also reach a recurrence period of 3 years). In this way, the service area of ​​the pipe with a recurrence period of 3 years accounts for the cumulative value of the service area proportion of pipe c and pipe b, which exceeds the requirement of the second preset threshold of 70%. It is then considered that the pipe capacity of drainage unit S is the drainage capacity of pipe b, which is once in 3 years.

[0099] The pipeline drainage capacity evaluation method provided by the present invention not only takes into account the actual drainage capacity of the pipelines, but also takes into account the proportion of their service area and the degree to which the overall drainage demand is met when determining the theoretical drainage capacity value, and can quickly and relatively accurately evaluate the theoretical drainage capacity value.

[0100] Based on the content of the above embodiment, as an optional embodiment, the pipeline construction age information of each target drainage unit can be determined based on the following steps: Determine all building units within the target drainage unit, and determine the building construction age information of the building units; Acquire a second centerline buffer layer of the road centerline layer of the target drainage unit, where the second centerline buffer layer is determined according to a second buffer width corresponding to a geometric centerline of each road in the target drainage unit, and the second buffer width is greater than the first buffer width; Determine a target building unit located on the second centerline buffer layer in the target drainage unit according to an intersection analysis result of all building units in the target drainage unit and the second centerline buffer layer; Determine the road construction age information according to the building construction age information of the target building unit; The road construction age information is used as the pipeline construction age information to assign a value to the physical drainage capacity of the target drainage unit.

[0101] It is generally difficult to obtain the information on the age of pipeline construction of the target drainage unit directly from the pipeline census data, and it needs to be determined in combination with certain spatial analysis methods.

[0102] Specifically, firstly, based on the method provided in the above embodiment, the target drainage unit is screened out, and then all the building units in the target drainage unit are identified using GIS or relevant urban planning databases. These building units include but are not limited to residential buildings, commercial buildings, public facilities, etc.

[0103] Next, information on the construction dates of these buildings is collected, which can usually be extracted from city archives, real estate registration departments or related databases using artificial intelligence technology.

[0104] Furthermore, in the GIS software, all the geometric center lines of the roads within the target drainage unit are extracted. Based on these geometric center lines, a second buffer width that is larger than the first buffer width is created based on the first buffer width, which is used for further buffer analysis of the geometric center lines of the road network. The reason for setting the second buffer width to be larger than the first buffer width is to ensure that the determined centerline buffer area can completely cover the surrounding building units. For example, the second buffer width is set to construct a second centerline buffer layer with 0.75 times the first buffer width from the geometric center line to both sides of the road (it can be understood that the second buffer width is 1.5 times the first buffer width). For a road with a first buffer width of 40 meters, the buffer range of the second centerline buffer layer made using its geometric center line is 0.75. 40 2=60 meters, which means that the width of the second centerline buffer layer determined at this time is 10 meters wider than the width of the first centerline buffer layer, which can basically cover the building units around the road.

[0105] It is generally believed that the construction of underground municipal pipelines and the development and construction of surrounding plots are implemented in the same cycle. The road network and route pipelines mainly serve the surrounding plots. Therefore, the construction age information of the building units constructed for the development of surrounding plots can be roughly equated with the construction age information of the underground municipal pipelines.

[0106] Therefore, the present invention uses the spatial analysis function to calculate the intersection of all building units in the target drainage unit and the second centerline buffer layer. Any building unit that intersects with the second centerline buffer layer is regarded as a target building unit located on or adjacent to the road. The location information of these building units indicates that they may be associated with the drainage system construction during or after the road construction.

[0107] Then, for the target building units determined in the previous step, analyze their house construction age information. Assuming that these building units were built with consideration of coordination with roads and drainage systems, their construction age can be used as a reference for road construction age. Statistical methods (such as median, mode, etc.) or expert judgment can be used to infer the corresponding road construction age information from the house construction age information of the target building units.

[0108] Since road construction and drainage system construction are often carried out simultaneously or closely, the inferred road construction age information can be used as the approximate pipeline construction age information of the pipelines in the target drainage unit. This pipeline construction age information is then used to assign a value to the physical drainage capacity of the target drainage unit, taking into account the impact of pipeline materials, design standards and possible maintenance conditions of different ages on drainage capacity.

[0109] Generally speaking, the service life of municipal pipelines is divided into 40 years. Pipelines with a service life of more than 40 years can be considered to be old and have hidden dangers, and failures may occur at any time affecting normal operation. Pipelines with a service life of about 20 years are close to half of their service life and also need appropriate repairs to improve service capabilities. Pipelines with a service life of less than 20 years are considered to have no significant attenuation risk in their physical structure and their physical drainage capacity is at a stable and sustainable level.

[0110] The present invention takes this fact into consideration, and the principle for continuing to assign values ​​to the physical drainage capacity of the pipeline is: if it is determined based on the pipeline construction age information that the pipeline in the target drainage unit is older, the assigned value of the physical drainage capacity will be smaller.

[0111] For example, if it is determined that the pipeline construction age information of the target drainage unit is greater than 40 years, its physical drainage capacity is set to 0.1; if it is determined that the pipeline construction age information of the target drainage unit is between 20 and 40 years, its physical drainage capacity is set to 0.5; if it is determined that the pipeline construction age information of the target drainage unit is less than 20 years, its physical drainage capacity is set to 1.

[0112] Specifically, taking the current time node of 2025, the physical drainage capacity of pipelines built in 1985 or before is 0.1, the physical drainage capacity of pipelines built between 1985 and 2005 is 0.5, and the physical drainage capacity of pipelines built after 2005 is 1.

[0113] In this way, the comprehensive drainage capacity of the target drainage unit can be determined based on the product between the theoretical drainage capacity and the physical drainage capacity, which is expressed as: Comprehensive drainage capacity = theoretical drainage capacity Physical drainage capacity.

[0114] Figure 5 is a schematic diagram of the structure of the pipeline coverage evaluation device provided by the present invention, such as Figure 5 As shown, mainly including but not limited to: A road centerline determination unit 51 is used to determine a road centerline layer according to the road network data of the drainage unit, wherein the road centerline layer is composed of geometric centerlines of all roads in the drainage unit; A centerline buffer layer determination unit 52, used to determine a first centerline buffer layer corresponding to the road centerline layer, wherein the first centerline buffer layer is determined according to a first buffer width corresponding to the geometric centerline of each road; A pipeline length determination unit 53, configured to determine the effective road network centerline length based on the first centerline buffer layer and the pipeline data layer of the drainage unit; The coverage calculation unit 54 is used to determine the pipe coverage of the drainage unit according to the effective road network centerline length and the actual road centerline length that has been planned.

[0115] It should be noted that the pipeline coverage assessment device provided by the present invention can execute the pipeline coverage assessment method described in any of the above embodiments during specific operation, which will not be elaborated in this embodiment.

[0116] Compared with the existing devices related to pipeline coverage estimation and pipeline capacity assessment, the pipeline coverage assessment device provided by the present invention can effectively enhance the accuracy of coverage statistics by analyzing the effective road network centerline length covered by the pipeline, and provide a more scientific, reasonable and easy-to-operate statistical equipment for management decision-makers.

[0117] Figure 6 Schematic diagram of the structure of the pipeline drainage capacity evaluation device provided by the present invention. Figure 6 As shown, mainly including but not limited to: A drainage unit screening unit 61 is used to run the pipeline coverage rate assessment method provided in any of the above embodiments to determine the pipeline coverage rate in the area to be assessed, and set each drainage unit whose pipeline coverage rate is greater than a first preset threshold as a target drainage unit; A theoretical drainage capacity evaluation unit 62, used to determine the theoretical drainage capacity of each of the target drainage units; A physical drainage capacity evaluation unit 63, configured to determine the physical drainage capacity of each target drainage unit according to the determined pipeline construction age information of each target drainage unit; A comprehensive drainage capacity determination unit 64, configured to determine the comprehensive drainage capacity of each target drainage unit according to the theoretical drainage capacity and the physical drainage capacity of each target drainage unit; The pipeline capacity comprehensive evaluation unit 65 is used to determine the pipeline drainage capacity evaluation information in the area to be evaluated according to the comprehensive drainage capacity of all the target drainage units in the area to be evaluated.

[0118] It should be noted that the pipeline drainage capacity assessment device provided by the present invention can execute the pipeline drainage capacity assessment method described in any of the above embodiments during specific operation, which will not be elaborated in this embodiment.

[0119] The pipeline drainage capacity assessment device provided by the present invention screens the target drainage units whose coverage rate basically meets the standard, obtains the theoretical drainage capacity of the pipe section by numerical simulation, and assesses the theoretical drainage capacity of the drainage unit by the proportion of the service area of ​​the pipe section. After further obtaining the physical drainage capacity by combining the information such as the service life of the pipeline, the comprehensive drainage capacity of the drainage unit is obtained. The drainage capacity of the pipeline and the drainage unit can be reflected more scientifically and reasonably from the two dimensions of hydraulic performance and structural properties, which is conducive to improving the scientific nature of drainage network construction decisions.

[0120] Figure 7 is a schematic diagram of the structure of the electronic device provided by the present invention, such as Figure 7 As shown, the electronic device may include: a processor 710, a communication interface 720, a memory 730 and a communication bus 740, wherein the processor 710, the communication interface 720 and the memory 730 communicate with each other through the communication bus 740. The processor 710 may call the logic instructions in the memory 730 to execute the pipeline coverage evaluation method, which includes: determining a road centerline layer according to the road network data of the drainage unit, wherein the road centerline layer is composed of the geometric centerlines of all roads in the drainage unit; determining a first centerline buffer layer corresponding to the road centerline layer, wherein the first centerline buffer layer is determined according to a first buffer width corresponding to the geometric centerline of each road; determining an effective road network centerline length based on the first centerline buffer layer and the pipeline data layer of the drainage unit; and determining the pipeline coverage of the drainage unit according to the effective road network centerline length and the actual road centerline length that has been planned.

[0121] Alternatively, a pipeline drainage capacity assessment method is executed, the method comprising: determining the pipeline coverage rate in the area to be assessed based on any one of the pipeline coverage rate assessment methods, and setting each drainage unit whose pipeline coverage rate is greater than a first preset threshold value as a target drainage unit; determining the theoretical drainage capacity of each of the target drainage units; determining the physical drainage capacity of the target drainage unit based on the determined pipeline construction age information of each of the target drainage units; determining the comprehensive drainage capacity of each of the target drainage units based on the theoretical drainage capacity and the physical drainage capacity of each of the target drainage units; and determining the pipeline drainage capacity assessment information in the area to be assessed based on the comprehensive drainage capacity of all the target drainage units in the area to be assessed.

[0122] In addition, the logic instructions in the above-mentioned memory 730 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on this understanding, the technical solution of the present invention can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0123] On the other hand, the present invention also provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium, and the computer program includes program instructions. When the program instructions are executed by a computer, the computer can execute a pipeline coverage evaluation method, which includes: determining a road centerline layer based on the road network data of the drainage unit, wherein the road centerline layer is composed of the geometric center lines of all roads in the drainage unit; determining a first centerline buffer layer corresponding to the road centerline layer, wherein the first centerline buffer layer is determined based on a first buffer width corresponding to the geometric center line of each road; determining an effective road network centerline length based on the first centerline buffer layer and the pipeline data layer of the drainage unit; and determining the pipeline coverage of the drainage unit based on the effective road network centerline length and the actual road centerline length of the planned implementation.

[0124] Alternatively, a pipeline drainage capacity assessment method is executed, the method comprising: determining the pipeline coverage rate in the area to be assessed based on any one of the pipeline coverage rate assessment methods, and setting each drainage unit whose pipeline coverage rate is greater than a first preset threshold value as a target drainage unit; determining the theoretical drainage capacity of each of the target drainage units; determining the physical drainage capacity of the target drainage unit based on the determined pipeline construction age information of each of the target drainage units; determining the comprehensive drainage capacity of each of the target drainage units based on the theoretical drainage capacity and the physical drainage capacity of each of the target drainage units; and determining the pipeline drainage capacity assessment information in the area to be assessed based on the comprehensive drainage capacity of all the target drainage units in the area to be assessed.

[0125] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which is implemented when the processor executes a pipeline coverage evaluation method, the method comprising: determining a road centerline layer based on the road network data of the drainage unit, the road centerline layer being composed of the geometric centerlines of all roads in the drainage unit; determining a first centerline buffer layer corresponding to the road centerline layer, the first centerline buffer layer being determined based on a first buffer width corresponding to the geometric centerline of each road; determining an effective road network centerline length based on the first centerline buffer layer and the pipeline data layer of the drainage unit; determining the pipeline coverage of the drainage unit based on the effective road network centerline length and the actual road centerline length that has been planned.

[0126] Alternatively, a pipeline drainage capacity assessment method is executed, the method comprising: determining the pipeline coverage rate in the area to be assessed based on any one of the pipeline coverage rate assessment methods, and setting each drainage unit whose pipeline coverage rate is greater than a first preset threshold value as a target drainage unit; determining the theoretical drainage capacity of each of the target drainage units; determining the physical drainage capacity of the target drainage unit based on the determined pipeline construction age information of each of the target drainage units; determining the comprehensive drainage capacity of each of the target drainage units based on the theoretical drainage capacity and the physical drainage capacity of each of the target drainage units; and determining the pipeline drainage capacity assessment information in the area to be assessed based on the comprehensive drainage capacity of all the target drainage units in the area to be assessed.

[0127] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0128] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0129] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pipeline coverage assessment method, characterized in that: include: Determine a road centerline layer according to the road network data of the drainage unit, wherein the road centerline layer is composed of geometric center lines of all roads in the drainage unit; Determine a first centerline buffer layer corresponding to the road centerline layer, wherein the first centerline buffer layer is determined according to a first buffer width corresponding to the geometric centerline of each road; Determining an effective road network centerline length based on the first centerline buffer layer and the pipeline data layer of the drainage unit; The pipe coverage rate of the drainage unit is determined according to the effective road network centerline length and the actual road centerline length that has been planned.

2. The pipeline coverage evaluation method according to claim 1, characterized in that: The determining of the first centerline buffer layer corresponding to the road centerline layer includes: Determining the road grade attribute of each road in the first centerline buffer layer according to the road network data; According to the different first buffer widths corresponding to the different road grade attributes, the first buffer width corresponding to the geometric center line of each road is determined, and the first centerline buffer layer is constructed.

3. The pipeline coverage evaluation method according to claim 1, characterized in that: The determining of the effective road network centerline length based on the first centerline buffer layer and the pipeline data layer of the drainage unit includes: Determine an intersection analysis layer between the first centerline buffer layer and the pipeline data layer of the drainage unit, wherein the intersection analysis layer is composed of a portion of the first centerline buffer layer that intersects with the pipeline data layer; The total length of the road centerline corresponding to the part of the first centerline buffer layer is counted as the effective road network centerline length.

4. The pipeline coverage evaluation method according to claim 1, characterized in that: The pipeline coverage rate is determined based on the ratio between the effective road network centerline length and the actual road centerline length.

5. A method for evaluating pipeline drainage capacity, characterized in that: include: Determine the pipeline coverage rate in the area to be evaluated based on the pipeline coverage rate evaluation method according to any one of claims 1 to 4, and set each drainage unit whose pipeline coverage rate is greater than a first preset threshold as a target drainage unit; Determining the theoretical drainage capacity of each of the target drainage units; Determining the physical drainage capacity of each target drainage unit according to the determined pipeline construction age information of each target drainage unit; Determining the comprehensive drainage capacity of each of the target drainage units according to the theoretical drainage capacity and the physical drainage capacity of each of the target drainage units; According to the comprehensive drainage capacity of all the target drainage units in the area to be evaluated, the pipeline drainage capacity evaluation information in the area to be evaluated is determined.

6. The pipeline drainage capacity evaluation method according to claim 5, characterized in that: The determining of the theoretical drainage capacity of each target drainage unit comprises: Obtain the drainage capacity and service area ratio of each pipe section in the target drainage unit, where the service area ratio is the ratio between the actual service area of ​​the pipe section and the total service area of ​​the target drainage unit; Sorting all pipe sections according to the order of drainage capacity from large to small to obtain a pipe section sequence of the target drainage unit; Accumulating the service area proportions of the first N pipe segments in the pipe segment sequence in sequence, and comparing the obtained service area combined proportion with a second preset threshold; If the combined service area ratio is less than the second preset threshold, set N=N+1, and obtain a new combined service area ratio again, until it is determined that the combined service area ratio is greater than or equal to the second preset threshold, where N is a positive integer; The final drainage capacity of the Nth pipe segment is set as the physical drainage capacity of the target drainage unit.

7. The pipeline drainage capacity evaluation method according to claim 5, characterized in that: The pipeline construction age information of each target drainage unit is determined based on the following steps: Determine all building units within the target drainage unit, and determine the building construction age information of the building units; Acquire a second centerline buffer layer of the road centerline layer of the target drainage unit, where the second centerline buffer layer is determined according to a second buffer width corresponding to a geometric centerline of each road in the target drainage unit, and the second buffer width is greater than the first buffer width; Determine a target building unit located on the second centerline buffer layer in the target drainage unit according to an intersection analysis result of all building units in the target drainage unit and the second centerline buffer layer; Determine the road construction age information according to the building construction age information of the target building unit; The road construction age information is used as the pipeline construction age information to assign a value to the physical drainage capacity of the target drainage unit.

8. The pipeline drainage capacity evaluation method according to claim 7, characterized in that: If it is determined based on the pipeline construction age information that the older the pipeline construction age in the target drainage unit is, the smaller the value assigned to the physical drainage capacity will be.

9. The pipeline drainage capacity evaluation method according to claim 5, characterized in that: The comprehensive drainage capacity is determined based on the product between the theoretical drainage capacity and the physical drainage capacity.

10. A pipeline coverage assessment device, characterized in that: include: A road centerline determination unit, used to determine a road centerline layer according to the road network data of the drainage unit, wherein the road centerline layer is composed of geometric centerlines of all roads in the drainage unit; A centerline buffer layer determination unit, used to determine a first centerline buffer layer corresponding to the road centerline layer, wherein the first centerline buffer layer is determined according to a first buffer width corresponding to the geometric centerline of each road; A pipeline length determination unit, configured to determine an effective road network centerline length based on the first centerline buffer layer and the pipeline data layer of the drainage unit; The coverage calculation unit is used to determine the pipe coverage of the drainage unit according to the effective road network centerline length and the actual road centerline length that has been planned.

11. A pipeline drainage capacity assessment device, characterized in that: include: A drainage unit screening unit, used for running the pipeline coverage evaluation method according to any one of claims 1 to 4 to determine the pipeline coverage in the area to be evaluated, and setting each drainage unit whose pipeline coverage is greater than a first preset threshold as a target drainage unit; A theoretical drainage capacity evaluation unit, used to determine the theoretical drainage capacity of each of the target drainage units; A physical drainage capacity evaluation unit, used to determine the physical drainage capacity of each target drainage unit according to the determined pipeline construction age information of each target drainage unit; a comprehensive drainage capacity determination unit, configured to determine the comprehensive drainage capacity of each of the target drainage units according to the theoretical drainage capacity and the physical drainage capacity of each of the target drainage units; The pipeline capacity comprehensive evaluation unit is used to determine the pipeline drainage capacity evaluation information in the area to be evaluated according to the comprehensive drainage capacity of all the target drainage units in the area to be evaluated.

12. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the pipeline coverage evaluation method as described in any one of claims 1 to 4 is implemented, or the pipeline drainage capacity evaluation method as described in any one of claims 5 to 9 is implemented.

13. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the pipeline coverage evaluation method according to any one of claims 1 to 4 is implemented, or the pipeline drainage capacity evaluation method according to any one of claims 5 to 9 is implemented.

14. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the pipeline coverage evaluation method according to any one of claims 1 to 4 is implemented, or the pipeline drainage capacity evaluation method according to any one of claims 5 to 9 is implemented.

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