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

Abstract

The present invention provides a method and device for evaluating pipeline coverage rate and pipeline drainage capacity, belonging to the technical field of data processing, including: determining a first median buffer layer according to the road network data of the drainage unit to determine the effective road network median length with the pipeline data layer; determining the pipeline coverage rate according to the effective road median length and the actual road median length, and determining the comprehensive drainage capacity according to the theoretical drainage capacity and physical drainage capacity of the target drainage unit. By analyzing the effective road median length covered by the pipeline, the present invention enhances the accuracy of coverage rate statistics, evaluates the theoretical drainage capacity of the drainage unit by numerical simulation and the proportion of the service area of the pipe section, and determines the physical drainage capacity by combining the pipeline construction year information, and then determines the comprehensive drainage capacity of the drainage unit, which can scientifically and reasonably reflect the drainage capacity of the pipeline and the drainage unit from two dimensions of hydraulic performance and structural attributes, and can provide more scientific and reasonable technical support for the improvement and update of the urban drainage pipe network system.

Description

Technical Field

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

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

[0003] Common evaluation indicators of municipal pipelines include pipeline coverage rate, pipeline drainage capacity, etc. Evaluation methods include model analysis method and statistical analysis method. How to reasonably analyze the current level of municipal facility construction through scientific means can provide a good working basis for subsequent municipal planning work, and can also clarify the key points of the next stage of work for urban builders and managers, improve investment efficiency and benefits, and targetedly solve the problems of facility shortboards.

[0004] The existing technical system has established various calculation methods for municipal pipeline evaluation, but there is still room for improvement in terms of the rationality and scientificity of the methods, 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 rate and pipeline drainage capacity, which are used to solve the defect that in the calculation of pipeline coverage rate in the prior art, the coverage rate is reflected by statistically calculating the ratio of the overall completed situation of pipelines to the length of the implemented roads, which is prone to misjudging the actual pipeline coverage rate. And in the evaluation of pipeline drainage capacity, only the drainage capacity of the pipeline is evaluated from the hydraulic conditions, ignoring the influence of the pipeline's own attributes on the pipeline service level, and it is easy to deviate from the actual situation in the analysis results.

[0006] The present invention provides a method for evaluating pipeline coverage rate, including the following steps:

[0007] Determine the road center line layer according to the road network data of the drainage unit, and the road center line layer is composed of the geometric center lines of all roads in the drainage unit;

[0008] Determine the first center line buffer layer corresponding to the road center line layer, and the first center line buffer layer is determined according to the first buffer width corresponding to the geometric center line of each road;

[0009] Based on the first center line buffer layer and the pipeline data layer of the drainage unit, determine the effective road network center line length;

[0010] Determine the pipeline coverage rate of the drainage unit according to the effective road network center line length and the actual road center line length of the realized plan.

[0011] According to the pipeline coverage rate evaluation method provided by the present invention, determining the first median buffer layer corresponding to the road median layer includes:

[0012] According to the road network data, determine the road grade attribute of each road in the first median buffer layer;

[0013] According to the different first buffer widths corresponding to different road grade attributes, determine the first buffer width corresponding to the geometric center line of each road, and construct the first median buffer layer.

[0014] According to the pipeline coverage rate evaluation method provided by the present invention, determining the effective road network median length based on the first median buffer layer and the pipeline data layer of the drainage unit includes:

[0015] Determine the intersection analysis layer between the first median buffer layer and the pipeline data layer of the drainage unit, and the intersection analysis layer is composed of a part of the first median buffer layer that has an intersection with the pipeline data layer;

[0016] Statistically calculate the total length of the road medians corresponding to the part of the first median buffer layer as the effective road network median length.

[0017] According to the pipeline coverage rate evaluation method provided by the present invention, the pipeline coverage rate is determined according to the ratio between the effective road network median length and the actual road median length.

[0018] The present invention also provides a pipeline drainage capacity evaluation method, including the following steps:

[0019] Based on any one of the above pipeline coverage rate evaluation methods, determine the pipeline coverage rate within the area to be evaluated, and set each drainage unit with a pipeline coverage rate greater than the first preset threshold as a target drainage unit;

[0020] Determine the theoretical drainage capacity of each target drainage unit;

[0021] According to the pipeline construction age information of each determined target drainage unit, determine the physical drainage capacity of the target drainage unit;

[0022] According to the theoretical drainage capacity and the physical drainage capacity of each target drainage unit, determine the comprehensive drainage capacity of each target drainage unit;

[0023] According to the comprehensive drainage capacity of all the target drainage units within the area to be evaluated, determine the pipeline drainage capacity evaluation information within the area to be evaluated.

[0024] According to the pipeline drainage capacity evaluation method provided by the present invention, determining the theoretical drainage capacity of each target drainage unit includes:

[0025] Obtain the drainage capacity and the proportion of the service area of each pipe section in the target drainage unit, where the proportion of the service area is the ratio between the actual service area of the pipe section and the total service area of the target drainage unit;

[0026] Sort all the pipe sections in descending order according to the drainage capacity to obtain the pipe section sequence of the target drainage unit;

[0027] Accumulate in sequence the proportion of the service area of the first N pipe sections in the pipe section sequence, and compare the combined proportion of the obtained service area with a second preset threshold;

[0028] If the combined proportion of the service area is less than the second preset threshold, then set N = N + 1, and re-obtain the new combined proportion of the service area until it is determined that the combined proportion of the service area is greater than or equal to the second preset threshold, where N is a positive integer;

[0029] Set the drainage capacity of the final Nth pipe section as the physical drainage capacity of the target drainage unit.

[0030] 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:

[0031] Determine all the building monomers in the target drainage unit, and determine the housing construction age information of the building monomers;

[0032] Obtain the second center line buffer layer of the road center line layer of the target drainage unit, where the second center line buffer layer is determined according to the second buffer width corresponding to the geometric center line of each road in the target drainage unit, and the second buffer width is greater than the first buffer width;

[0033] Determine the target building monomers in the target drainage unit that are located on the second center line buffer layer according to the intersection analysis result of all the building monomers in the target drainage unit and the second center line buffer layer;

[0034] Determine the road construction age information according to the housing construction age information of the target building monomers;

[0035] Take the road construction age information as the pipeline construction age information for assigning a value to the physical drainage capacity of the target drainage unit.

[0036] According to the pipeline drainage capacity evaluation method provided by the present invention, if it is determined according to the pipeline construction age information that the older the pipeline construction years in the target drainage unit, the smaller the value assigned to the physical drainage capacity.

[0037] According to the pipeline drainage capacity evaluation method provided by the present invention, the comprehensive drainage capacity is determined based on the product between the theoretical drainage capacity and the physical drainage capacity.

[0038] The present invention also provides a pipeline coverage rate evaluation device, including the following modules:

[0039] A road center line determination unit, configured to determine a road center line layer according to the road network data of the drainage unit, and the road center line layer is composed of the geometric center lines of all roads within the drainage unit;

[0040] A center line buffer layer determination unit, configured to determine a first center line buffer layer corresponding to the road center line layer, and the first center line buffer layer is determined according to a first buffer width corresponding to the geometric center line of each road;

[0041] A pipeline length determination unit, configured to determine an effective road network center line length based on the first center line buffer layer and the pipeline data layer of the drainage unit;

[0042] A coverage rate calculation unit, configured to determine the pipeline coverage rate of the drainage unit according to the effective road network center line length and the actual road center line length of the realized plan.

[0043] The present invention also provides a pipeline drainage capacity evaluation device, including the following modules:

[0044] A drainage unit screening unit, configured to run any one of the above pipeline coverage rate evaluation methods to determine the pipeline coverage rate within the area to be evaluated, and set each drainage unit with the pipeline coverage rate greater than a first preset threshold as a target drainage unit;

[0045] A theoretical drainage capacity evaluation unit, configured to determine the theoretical drainage capacity of each target drainage unit;

[0046] A physical drainage capacity evaluation unit, configured to determine the physical drainage capacity of the target drainage unit according to the pipeline construction age information of each determined target drainage unit;

[0047] A comprehensive drainage capacity determination unit, 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;

[0048] A pipeline capacity comprehensive evaluation unit, configured to determine the pipeline drainage capacity evaluation information within the area to be evaluated according to the comprehensive drainage capacity of all the target drainage units within the area to be evaluated.

[0049] The present invention also provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, the method for evaluating the pipeline coverage rate or the pipeline drainage capacity as described in any one of the above is implemented.

[0050] The present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the method for evaluating the pipeline coverage rate or the pipeline drainage capacity as described in any one of the above is implemented.

[0051] The present invention also provides a computer program product, including a computer program. When the computer program is executed by a processor, the method for evaluating the pipeline coverage rate or the pipeline drainage capacity as described in any one of the above is implemented.

[0052] The method and device for evaluating the pipeline coverage rate and the pipeline drainage capacity provided by the present invention. By analyzing the effective road center line length covered by the pipeline, the accuracy of coverage rate statistics is enhanced. The theoretical drainage capacity of the drainage unit is evaluated by numerical simulation and the proportion of the service area of the pipe section. After obtaining the physical drainage capacity by combining the pipeline construction year information, the comprehensive drainage capacity of the drainage unit is determined, which can scientifically and reasonably reflect the drainage capacity of the pipeline and the drainage unit from two dimensions of hydraulic performance and structural attributes, and can provide more scientific and reasonable technical support for the improvement and update of the urban drainage pipe network system. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0054] Figure 1 is one of the flow schematic diagrams of the method for evaluating the pipeline coverage rate provided by the present invention.

[0055] Figure 2 is another flow schematic diagram of the method for evaluating the pipeline coverage rate provided by the present invention.

[0056] Figure 3 is one of the flow schematic diagrams of the method for evaluating the pipeline drainage capacity provided by the present invention.

[0057] Figure 4 is another flow schematic diagram of the method for evaluating the pipeline drainage capacity provided by the present invention.

[0058] Figure 5 is the structural schematic diagram of the device for evaluating the pipeline coverage rate provided by the present invention.

[0059] Figure 6 It is a schematic structural diagram of the pipeline drainage capacity evaluation device provided by the present invention.

[0060] Figure 7 It is a schematic structural diagram of the electronic device provided by the present invention. Specific embodiments

[0061] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts shall fall within the protection scope of the present invention.

[0062] It should be noted that in the description of the present invention, the terms "include", "comprise" or any other variant thereof are intended to cover a non-exclusive inclusion, such that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "including one..." does not exclude the presence of additional identical elements in the process, method, article or device including the element. The orientation or positional relationship indicated by the terms "upper", "lower", etc. is based on the orientation or positional relationship shown in the 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 thus cannot be construed as a limitation of 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 specific circumstances.

[0063] The terms "first", "second", etc. in the present invention are used to distinguish similar objects, rather than 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 do not limit the number of objects. For example, the first object can be one or more. In addition, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates an "or" relationship between the associated objects before and after.

[0064] There are few studies on the method for calculating the pipeline coverage rate at present, but there have been many research results on the evaluation method of the drainage pipe network capacity. For example:

[0065] The currently commonly used method for obtaining the drainage capacity of pipelines based on model simulation analysis mainly involves simulating through the establishment of models such as the MIKE URBAN one-dimensional pipe network model under different return periods, and using the simulation results to evaluate the drainage capacity of the area to be measured.

[0066] Among them, the pipe return period is mainly used to evaluate the drainage capacity of the drainage pipe network under specific rainfall events. It helps determine whether the pipes can effectively cope with rainfall of different frequencies, thus preventing drainage problems such as waterlogging. The pipe return period is not a directly calculated value, but is determined through simulation analysis based on historical rainfall data and future rainfall predictions, 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 conditions of the pipes under different rainfall return periods (such as once in 2 years, once in 5 years, etc.) to evaluate whether the drainage capacity of the pipe system meets the design requirements. This process requires comprehensive consideration of multiple factors such as rainfall intensity, duration, pipe size, and flow velocity.

[0067] There is also a method in the prior art that analyzes the capacity of the existing urban rainwater drainage pipe network and the risk of waterlogging through the urban rainwater simulation software Infoworks ICM.

[0068] In addition, there is currently a method for evaluating the drainage capacity of pipes by calculating the hydraulic performance index and improving it to 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, so as to reflect the degree of overloading of the pipe itself and the impact of this section of the pipe on the overloading of the upstream pipe.

[0069] At present, most of the other methods for evaluating the drainage capacity of pipes mainly adopt numerical model simulation, which will not be elaborated here.

[0070] However, through specific analysis, it can be seen that the method for obtaining the drainage capacity of pipes based on model simulation analysis and the method for analyzing the capacity of the existing urban rainwater drainage pipe network and the risk of waterlogging through urban rainwater simulation software both consider obtaining the drainage capacity of pipes in the urban built-up area through numerical simulation. They are one of the most commonly used methods for estimating pipe capacity, but they do not give the calculation method for the pipe capacity divided into drainage units, and only analyze the pipe capacity from the perspective of pipe hydraulic performance, without considering the structural and functional attributes of the pipes, so it is easy to form misjudgments.

[0071] The method for evaluating the drainage capacity of pipelines through the comprehensive hydraulic performance index is actually a hydraulic performance index based on the improved non-steady flow Bernoulli equation, which uses the pipeline liquid level as the evaluation criterion. This index is a comprehensive evaluation index that takes into account the overloading degree of the pipeline itself and the influence of the downstream pipeline on the upstream pipeline's overloading. Starting from theoretical analysis, it considers the influence of the liquid levels of different pipe sections on the upstream pipe section, and its theoretical basis is relatively complete. However, it is too theoretical, with poor practicality at the engineering management level, inconvenient for managers to use, has high requirements for data, requires detailed pipeline information and parameters, and is also not convenient for statistical analysis at the drainage unit scale.

[0072] In summary, the existing pipeline coverage rate is often evaluated by analyzing the pipeline length within a certain drainage unit and the proportion of the pipeline in the length of the implemented roads in the area. In the analysis of pipeline capacity, managers usually use software tools to characterize and simulate the pipeline capacity. Specifically, by collecting detailed land use / land cover conditions, ground elevation conditions, and given rainfall scenarios, etc., a numerical model is established to evaluate the service capacity of each pipe section. In terms of calculating the pipeline coverage rate, reflecting the coverage rate by statistically calculating the ratio of the total built pipeline situation to the length of the implemented roads is prone to misjudging the actual pipeline coverage rate. This is because for roads with different grades, rainwater pipelines need to be set on both sides of some roads, and there are often situations of "multiple pipelines for one road". Therefore, errors are likely to occur when estimating the implementation rate using the total pipeline length. When using the traditional method to evaluate the pipeline capacity based on a numerical model, although it can reflect the pipeline capacity of different pipe sections, it does not give a comprehensive evaluation of the pipeline capacity within a certain management unit (such as a drainage unit), and only considering the pipeline capacity from the hydraulic conditions ignores structural factors such as the old degree of the pipeline, neglecting the influence of the pipeline's own attributes on the pipeline service level, and the final analysis results are likely to deviate from the actual situation.

[0073] In view of this, the present invention provides a new method and device for evaluating the pipeline coverage rate and the pipeline drainage capacity, which can overcome the above-mentioned deficiencies of the existing technology to a certain extent. The following will be specifically described in combination with Figures 1 - 7 for specific description.

[0074] Generally speaking, municipal pipelines are required to be laid under municipal roads, and can be located under motor vehicle lanes, non-motor vehicle lanes or pedestrian walkways. For special sections limited by the tight underground space of municipal roads and other scenarios, pipeline laying will be considered in the roadside green spaces at an appropriate distance. Due to the characteristic of pipelines being laid along the road, generally speaking, by counting the length of the implemented roads, the general implementation situation of the pipelines under the road can be clarified.

[0075] The pipeline coverage rate evaluation method based on road network analysis provided by the present invention precisely utilizes the feature of "mutual following of pipelines and roads" to establish a pipeline network coverage rate analysis method based on statistically calculating the coverage degree of pipelines under roads. Specifically, by determining the effective road network center line length of the implemented municipal pipelines and comparing it with the actual road center line length of the realized plan, a more scientific and reasonable calculation of the pipeline network coverage rate can be achieved.

[0076] Figure 1 It is one of the schematic flowcharts of the pipeline coverage rate evaluation method provided by the present invention. As Figure 1 shown, it includes but is not limited to the following steps:

[0077] Step 101: Determine the road center line layer based on the road network data of the drainage unit.

[0078] A drainage unit refers to a drainage system in which multiple pipelines are connected end to end from upstream to downstream and jointly form a system that discharges into a river. Each pipeline in it undertakes a certain drainage basin range and collaborates together to ensure smooth drainage.

[0079] First, it is necessary to obtain the road network data of the drainage unit, for example, obtain the road network data from the relevant national geographical conditions census database. Among them, the road network data includes the geometric shapes (such as the road center lines represented by lines) and attribute information (such as road grades, names, etc.) of all roads within the drainage unit.

[0080] These road network data usually exist in the form of Geographic Information System (GIS) data. Therefore, specialized GIS software (such as ArcGIS) can be used to open the obtained road network data.

[0081] Then, through the tools in ArcGIS, the center lines of the roads can be extracted to form a road center line layer. The road center line layer is a set composed of the geometric center lines of all roads within the drainage unit, representing the geometric positions of the roads, and providing a basis for subsequent spatial analysis.

[0082] Step 102: Determine the first center line buffer layer corresponding to the road center line layer. The first center line buffer layer is determined according to the first buffer width corresponding to the geometric center line of each road.

[0083] Among them, the first buffer width refers to the width determined according to factors such as road grade attributes for creating a buffer zone. The present invention introduces the feature of the first buffer width because a road is not just a line, but also has a certain width and influence range. When calculating the pipeline coverage rate, if only the road center line is considered, the actual influence areas on both sides of the road may be ignored. By introducing the first buffer width, the influence of the road and its surrounding areas on pipeline coverage can be more accurately reflected. If the road center line is directly used for the evaluation of the coverage rate, errors may occur because the road center line cannot fully represent the actual position and coverage range of the road. By adding the spatial buffer width, this kind of error can be reduced to a certain extent, making the calculation result closer to the actual situation.

[0084] The first buffer width can be pre-determined based on factors such as road grade attributes. The determination principle is the minimum width that should be achieved between the road land boundary lines to meet traffic, safety, and other functional requirements.

[0085] The determination of the first buffer width can be comprehensively considered according to factors such as road grade, traffic flow, and surrounding spatial characteristics to achieve the minimum width that should be achieved between the road land boundary lines to meet traffic, safety, and other functional requirements. For example: Since urban arterial roads have large traffic flows and tight surrounding spaces, a larger first buffer width needs to be set; while for urban sub-arterial roads and branch roads, relatively smaller first buffer widths can be set.

[0086] Then, using the spatial analysis function of ArcGIS, according to the determined first buffer width, a corresponding spatial buffer zone is created for the geometric center line of each road to form the first center line buffer layer.

[0087] Step 103, based on the first center line buffer layer and the pipeline data layer of the drainage unit, determine the effective road network center line length.

[0088] Among them, the pipeline data layer refers to a database containing all pipeline geometries and attribute information of the drainage unit, and the effective road network center line length refers to the length of the road center line covered by the pipelines located within the road buffer zone.

[0089] Specifically, the present invention first retrieves the pipeline data layer of the drainage unit. This data layer should contain the pipeline geometries (such as the pipeline alignment represented by lines) and attribute information (such as pipeline diameter, material, etc.). Then, the spatial analysis tool of ArcGIS is used to perform an intersection analysis (such as INTERSECT analysis) on the first center line buffer layer and the pipeline data layer. The result of the intersection analysis will generate a new layer, which contains the pipeline parts that intersect with the first center line buffer layer.

[0090] Extract all the lengths of the road centerlines marked as "pipeline" from the results of the intersection analysis, which is the length of the effective road network centerlines. The length of the effective road network centerlines represents the length of the road centerlines covered by the pipelines located within the road buffer zones, and it effectively reflects the coverage of the pipelines in the drainage unit within the road buffer zones.

[0091] Step 104: Determine the pipeline coverage rate of the drainage unit based on the length of the effective road network centerlines and the actual length of the road centerlines of the realized plan.

[0092] After determining the length of the effective road network centerlines, it is necessary to obtain the actual length of the road centerlines of the realized plan, which represents the total length of the roads with the realized road network plan within the drainage unit.

[0093] The statistical function of GIS software can be used to extract the total length of all the road centerlines in the road network data as the actual length of the road centerlines.

[0094] Then, compare the length of the effective road network centerlines with the actual length of the road centerlines to obtain the pipeline coverage rate. The pipeline coverage rate represents the coverage degree of the current pipelines in the roads with the realized road network plan.

[0095] Compared with the existing pipeline coverage rate estimation methods and pipeline capacity evaluation methods, the pipeline coverage rate evaluation method provided by the present invention can effectively enhance the accuracy of the coverage rate statistics by analyzing the length of the effective road network centerlines covered by the pipelines, and provides a more scientific, reasonable and easy-to-operate statistical method for the management decision-making level.

[0096] Based on the content of the above embodiments, as an alternative embodiment, the present invention also provides a specific implementation manner for determining the first centerline buffer layer corresponding to the road centerline layer, mainly including:

[0097] Determine the road grade attributes of each road in the first centerline buffer layer according to the road network data;

[0098] Determine the first buffer width corresponding to the geometric centerline of each road according to the different first buffer widths corresponding to the different road grade attributes, and construct the first centerline buffer layer.

[0099] Figure 2 It is the second flow chart of the pipeline coverage rate evaluation method provided by the present invention. As Figure 2 shown, first, retrieve the road network data related to the drainage unit to be analyzed from the database related to the national geographical conditions census, and extract the road centerline layer in the road network data.

[0100] Then, the road grade attributes of each road related to the drainage unit are determined according to the road network data, which are mainly divided according to factors such as traffic flow, design speed, and function of the road. For example, it includes urban expressways, urban arterial roads, urban sub-arterial roads, and urban branch roads, etc.

[0101] According to the road grade attributes of different roads, different first buffer widths corresponding to each road are determined. For example, the first buffer width of the urban expressway can be set to 65 meters, the first buffer width of the urban arterial road can be set to 40 meters, and the first buffer width of the urban sub-arterial road and urban branch road can be set to 30 meters.

[0102] 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 for the geometric center line of each road, thereby constructing the first center line buffer layer. For example, a center line buffer layer is constructed from the geometric center line to both sides of the road with 0.5 times the first buffer width.

[0103] The pipeline coverage rate evaluation method provided by the present invention scientifically and reasonably determines the first center line buffer layer corresponding to the road center line layer by introducing the road grade attributes of different roads, provides important data support for the subsequent pipeline coverage rate calculation method based on road network analysis, greatly improves the accuracy and objectivity of the pipeline coverage rate calculation, and provides more scientific and reasonable technical support for municipal planning and management.

[0104] Based on the content of the above embodiment, as an alternative embodiment, determining the effective road network center line length based on the first center line buffer layer and the pipeline data layer of the drainage unit specifically includes, but is not limited to:

[0105] Determine the intersection analysis layer between the first center line buffer layer and the pipeline data layer of the drainage unit, and the intersection analysis layer is composed of a part of the first center line buffer layer that intersects with the pipeline data layer;

[0106] Statistical the total length of the road center lines corresponding to the part of the first center line buffer layer as the effective road network center line length.

[0107] In the planning and management of the urban drainage system, the determination of the effective road network center line length is crucial for evaluating the pipeline coverage rate, pipeline drainage capacity, optimizing the pipeline layout, and predicting potential drainage problems. By accurately calculating the effective road network center line length directly related to the drainage unit, the coverage rate of the drainage unit can be evaluated more accurately.

[0108] Continue to refer to Figure 2As shown, the spatial analysis tool (such as INTERSECT) of GIS software can be used to perform an intersection analysis on the first median buffer layer (i.e., the buffer zone generated based on the road median to expand the analysis scope to include possible drainage pipes) and the pipe data layer of the drainage unit, so as to identify those parts of the road median that are directly related to the drainage pipes, that is, those parts that are located within the first median buffer layer and have an intersection with the pipe data layer.

[0109] The INTERSECT analysis tool in GIS software can automatically identify and extract the overlapping area between the first median buffer layer and the pipe data layer. In this embodiment, the overlapping area is the intersection analysis layer, which contains all parts of the road median buffer zone that are directly related to the drainage pipes.

[0110] Next, by statistically calculating the total length of the road median corresponding to all parts of the first median buffer layer in the intersection analysis layer, it is denoted as the effective road network median length. This step can be obtained by measuring the length of each element (i.e., each road median segment intersecting with the drainage pipe) in the intersection analysis layer and accumulating these length values.

[0111] The pipe coverage rate evaluation method provided by the present invention can not only accurately calculate the effective road network median length, but also intuitively show which road medians are directly related to the drainage system, thus providing strong data support for the subsequent optimization and planning of the drainage system, and has a high degree of automation, which can significantly improve work efficiency and accuracy.

[0112] Based on the content of the above embodiment, as an alternative embodiment, the pipe coverage rate is determined according to the ratio between the effective road network median length and the actual road median length, that is, the finally obtained pipe coverage rate = effective road network median length / actual road median length.

[0113] The prior art usually takes the result of the pipe recurrence period obtained from the theoretical level as the evaluation result of the drainage capacity of the pipe. In scientific research, the theoretical drainage capacity of the pipe obtained based on the model analysis method can only be used as the theoretical drainage capacity of the pipe.

[0114] The pipe capacity evaluation method based on the drainage unit provided by the present invention uses model tools, the spatial analysis tool of ArcGIS, and Internet big data, combines the theoretical drainage capacity and physical drainage capacity of the pipe and the drainage unit, realizes the coupling of theory and actual situation, and improves the accuracy of the pipe drainage capacity evaluation result, which is mainly reflected in two improved features:

[0115] 1) Fully consider the pipe coverage rate result, and enter the pipe capacity evaluation stage by screening the drainage units with a pipe coverage rate not lower than the first preset threshold as the drainage units with basically qualified pipe laying density.

[0116] 2) Combine the pipeline construction age information, analyze the potential hazards of the pipeline, and analyze the actual physical drainage capacity of the pipeline in a stepwise decreasing manner according to the order from new to old of the pipeline construction age. Use the physical drainage capacity to correct the loss degree of the theoretical drainage capacity, so as to obtain the comprehensive drainage capacity of the drainage unit.

[0117] Figure 3 It is one of the schematic flowcharts of the pipeline drainage capacity evaluation method provided by the present invention. As Figure 3 shown, it mainly includes but is not limited to the following steps:

[0118] Step 301, use the pipeline coverage rate evaluation method provided in any of the above embodiments to determine the pipeline coverage rate of each drainage unit in the area to be evaluated, and set each drainage unit with a pipeline coverage rate greater than the first preset threshold as the target drainage unit.

[0119] Specifically, by collecting data such as the geographical information, pipeline layout and length of all drainage units in the area to be evaluated, the pipeline coverage rate of each drainage unit can be calculated. Subsequently, by setting a first preset threshold, such as 60%, the drainage units with a pipeline coverage rate exceeding this threshold are marked as target drainage units. These target drainage units are considered to be the key parts for evaluating the drainage capacity of the entire area due to their high pipeline coverage rate.

[0120] Step 302, determine the theoretical drainage capacity of each of the target drainage units.

[0121] Generally speaking, the theoretical drainage capacity refers to the maximum drainage efficiency that the 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.

[0122] However, when calculating the theoretical drainage capacity of the target drainage unit in the present invention, since there may be multiple pipe segments in a target drainage unit, and each pipe segment has different drainage capacities. For example, drainage unit S is a drainage unit that discharges into a river and is composed of three pipes a, b, and c connected in series from upstream to downstream. The recurrence period corresponding to pipe a is once every 2 years, the recurrence period corresponding to pipe b is once every 3 years, and the recurrence period corresponding to pipe c is once every 5 years. At this time, it is difficult to determine the theoretical drainage capacity of the entire drainage unit in a conventional way.

[0123] In this embodiment, by comprehensively considering the drainage capacity and service area ratio of each pipeline, the theoretical drainage capacity of the entire pipeline is determined.

[0124] Step 303: Determine the physical drainage capacity of each target drainage unit based on the determined pipeline construction age information of each target drainage unit.

[0125] The physical drainage capacity in the present invention fully considers the influence of factors such as aging, sedimentation, and damage in the actual use of pipelines on the drainage efficiency. For example, by collecting the pipeline construction age information of each target drainage unit and combining information such as historical maintenance records and on-site inspection results, the actual operating status of the pipeline can be comprehensively evaluated, that is, calculated using this information.

[0126] Step 304: Determine the comprehensive drainage capacity of each target drainage unit based on the theoretical drainage capacity and the physical drainage capacity of each target drainage unit.

[0127] The comprehensive drainage capacity is the result obtained by comprehensively considering the theoretical drainage capacity and the physical drainage capacity, which not only considers the ideal state of pipeline design but also reflects the limiting conditions in actual use. In specific implementation, the weighted average method or other suitable 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.

[0128] Step 305: Determine the pipeline capacity assessment information within the area to be evaluated based on the comprehensive drainage capacity of all the target drainage units within the area to be evaluated.

[0129] Finally, by summarizing and analyzing the comprehensive drainage capacity of all target drainage units within the area to be evaluated, the pipeline drainage capacity assessment information for the entire area to be evaluated is obtained. This pipeline drainage capacity assessment information may include quantitative indicators of the overall drainage capacity of the area, the relative differences between each target drainage unit, the identification of potential drainage bottleneck areas, and the distribution of these drainage units with a pipeline coverage rate less than or equal to the first preset threshold that were screened out in Step 301, etc.

[0130] The pipeline drainage capacity assessment method provided by the present invention, after screening out the target drainage units with basically qualified coverage rates, uses numerical simulation to obtain the theoretical drainage capacity of the pipe sections, evaluates the theoretical drainage capacity of the drainage units based on the proportion of the service area of the pipe sections, and further combines information such as the service life of the pipelines to obtain the physical drainage capacity, and then obtains the comprehensive drainage capacity of the drainage units, which can more scientifically and reasonably reflect the drainage capacity of the pipelines and drainage units from two dimensions of hydraulic performance and structural attributes, and is conducive to improving the scientific nature of the decision-making for the construction of the drainage pipe network.

[0131] Based on the content of the above embodiments, as an alternative embodiment, the determination of the theoretical drainage capacity of each target drainage unit mentioned in the above embodiments specifically includes, but is not limited to, the following steps:

[0132] Obtain the drainage capacity and the proportion of service area of each pipe segment in the target drainage unit, where the proportion of service area is the ratio between the actual service area of the pipe segment and the total service area of the target drainage unit;

[0133] Sort all pipe segments according to the drainage capacity from large to small to obtain the pipe segment sequence of the target drainage unit;

[0134] Accumulate the proportion of service area of the first N pipe segments in the pipe segment sequence in turn, and compare the combined proportion of service area obtained with a second preset threshold;

[0135] If the combined proportion of service area is less than the second preset threshold, let N = N + 1, and re-obtain the new combined proportion of service area until it is determined that the combined proportion of service area is greater than or equal to the second preset threshold, where N is a positive integer;

[0136] Set the drainage capacity of the final Nth pipe segment as the physical drainage capacity of the target drainage unit.

[0137] Figure 4 It is the second flow chart of the pipeline drainage capacity evaluation method provided by the present invention. As Figure 4 shown, it mainly includes the following steps:

[0138] First, for each target drainage unit, collect and sort out the detailed data of all pipe segments inside it, including the drainage capacity of each pipe segment (i.e., the maximum water flow that the pipe segment can handle under ideal conditions) and the service area (i.e., the geographical area directly served by the pipe segment).

[0139] Subsequently, calculate the proportion of service area of each pipe segment, that is, the ratio between the service area of the pipe segment and the total service area of the target drainage unit.

[0140] Next, the pipe segments can be sorted from large to small according to the drainage capacity of each pipe segment to form an ordered pipe segment sequence, which helps to identify those pipe segments with higher drainage efficiency, so as to give priority to them in subsequent analysis.

[0141] Still taking the drainage unit S in the above embodiment as an example for illustration. Assume that the catchment area of drainage unit S is A, the a pipe corresponds to a recurrence period of 2 years, and the pipe service area is 20%A; the b pipe corresponds to a recurrence period of 3 years, and the pipe service area is 50%A; the c pipe corresponds to a recurrence period of 5 years, and the pipe service area is 30%A.

[0142] Then the formed pipe segment sequence after sorting is [c, 5-year recurrence period, 30%A; b, 3-year recurrence period, 50%A; c, 2-year recurrence period, 20%A].

[0143] Then, the proportion of the service areas of the first N pipe segments in the pipe segment sequence is accumulated in sequence to obtain a combined proportion of the service area. This ratio reflects the proportion of the area jointly served by the first N pipe segments in the total service area of the target drainage unit.

[0144] Assume that the second preset threshold is 70%. According to the above method, first let N = 1, and take the first pipe c in the pipe segment sequence. However, for pipe c with a recurrence period of 5-year return period in drainage unit S, the proportion of its service area is only 30%. Therefore, it is necessary to let N = 2, and further accumulate the service area of pipe b with a recurrence period of 3-year return period (because pipe c with a 5-year return period can obviously also reach a 3-year return period). In this way, the proportion of the service area of the pipes with a recurrence period of 3-year return period is the accumulated value of the service area proportions of pipe c and pipe b, which is 80%, exceeding the requirement of the second preset threshold of 70%. Then, it is considered that the pipe capacity of drainage unit S is the drainage capacity of pipe b with a 3-year return period.

[0145] The pipe drainage capacity evaluation method provided by the present invention, when determining the theoretical drainage capacity value, not only considers the actual drainage capacity of the pipes, but also considers the proportion of their service areas and the satisfaction degree of the overall drainage demand, and can quickly and relatively accurately evaluate the theoretical drainage capacity value.

[0146] Based on the content of the above embodiments, as an alternative embodiment, the pipe construction age information of each target drainage unit can be determined based on the following steps:

[0147] Determine all building monomers in the target drainage unit, and determine the housing construction age information of the building monomers;

[0148] Obtain the second center line buffer layer of the road center line layer of the target drainage unit. The second center line buffer layer is determined according to the second buffer width corresponding to the geometric center line of each road in the target drainage unit, and the second buffer width is greater than the first buffer width;

[0149] According to the intersection analysis result of all building monomers in the target drainage unit and the second center line buffer layer, determine the target building monomers located on the second center line buffer layer in the target drainage unit;

[0150] According to the housing construction age information of the target building monomers, determine the road construction age information;

[0151] Use the road construction age information as the pipe construction age information to assign a value to the physical drainage capacity of the target drainage unit.

[0152] For the acquisition of the pipeline construction age information of the target drainage unit, it is generally difficult to directly obtain from the pipeline census data and certain spatial analysis methods need to be combined to determine it.

[0153] Specifically, first, based on the method provided in the above embodiment, the target drainage unit is screened out, and then all building monomers within the target drainage unit are identified by using GIS or relevant urban planning databases. These building monomers include but are not limited to residential buildings, commercial buildings, public facilities, etc.

[0154] Next, collect the housing construction age information of these building monomers, which can usually be extracted from the urban archives, real estate registration departments or relevant databases by using artificial intelligence technology.

[0155] Furthermore, in the GIS software, extract all the geometric centerlines of the roads within the target drainage unit. Based on these geometric centerlines, a second buffer width larger than the first buffer width is created for further buffer analysis of the geometric centerlines of the road network. The reason for setting the second buffer width to be greater than the first buffer width is to ensure that the determined median buffer area can completely cover the surrounding building monomers. For example, set the second buffer width to construct a second median buffer layer with 0.75 times the first buffer width from the geometric centerline to both sides of the road (it can be understood that the second buffer width is 1.5 times the first buffer width). Then, for a road with a first buffer width of 40 meters, the buffer range of the second median buffer layer made from its geometric centerline is 0.75 40 ×2 = 60 meters, which means that the width of the determined second median buffer layer is 10 meters wider than that of the first median buffer layer and can basically cover the building monomers around the road.

[0156] Generally, it is considered that the construction of the municipal pipelines under the road and the development and construction of the surrounding plots have the characteristic of being implemented in the same cycle. The road network and route pipelines mainly serve the surrounding plots. Therefore, the housing construction age information of the building monomers constructed in the development of the surrounding plots can be roughly equated with the pipeline construction age information of the municipal pipelines under the road.

[0157] Thus, the present invention uses the spatial analysis function to calculate the intersection of all the building monomers within the target drainage unit and the second median buffer layer. Any building monomer that intersects with the second median buffer layer is regarded as a target building monomer located on or adjacent to the road. The location information of these building monomers indicates that they may be related to the road construction or subsequent drainage system construction in the same period.

[0158] Then, for the target building units determined in the previous step, analyze the information on the construction years of their houses. Assuming that these building units considered the coordination with the road and drainage systems during construction, their construction years can be used as a reference for the road construction years. Statistical methods (such as median, mode, etc.) or expert judgment can be employed to infer the corresponding road construction year information from the house construction year information of the target building units.

[0159] Since road construction and drainage system construction often occur simultaneously or immediately afterwards, the inferred road construction year information can be used as the approximate pipe construction year information of the pipes within the target drainage unit. This pipe construction year information is subsequently used to assign a value to the physical drainage capacity of the target drainage unit, taking into account the impact of pipe materials, design standards, and possible maintenance conditions in different years on the drainage capacity.

[0160] Generally speaking, the service life of municipal pipes is divided by 40 years. Pipes with a service life exceeding 40 years can be considered as old and potentially hazardous pipes, which may malfunction at any time and affect normal operation; while pipes with a service life of about 20 years are approaching half of their service life and also require appropriate repairs to improve service capabilities. Pipes with a service life 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.

[0161] Considering this fact, the principle in continuing to assign a value to the physical drainage capacity of the pipes is: the longer the pipe construction years in the target drainage unit are determined according to the pipe construction year information, the smaller the value assigned to the physical drainage capacity.

[0162] For example, if it is determined that the pipe construction year information of the target drainage unit is greater than 40 years, set its physical drainage capacity to 0.1; if it is determined that the pipe construction year information of the target drainage unit is between 20 and 40 years, set its physical drainage capacity to 0.5; if it is determined that the pipe construction year information of the target drainage unit is less than 20 years, set its physical drainage capacity to 1.

[0163] Specifically, taking the current year 2025 as the time node, for pipes built in 1985 and before, their physical drainage capacity is 0.1; for pipes built between 1985 and 2005, their physical drainage capacity is 0.5; for pipes built after 2005, their physical drainage capacity is 1.

[0164] In this way, the comprehensive drainage capacity of the target drainage unit can be determined based on the product of the theoretical drainage capacity and the physical drainage capacity, expressed as:

[0165] Comprehensive drainage capacity = Theoretical drainage capacity × Physical drainage capacity.

[0166] Figure 5 is a schematic structural diagram of the pipeline coverage rate evaluation device provided by the present invention. As Figure 5 shown, it mainly includes but is not limited to:

[0167] A road centerline determination unit 51, configured to determine a road centerline layer according to the road network data of the drainage unit, where the road centerline layer is composed of the geometric centerlines of all roads within the drainage unit;

[0168] A centerline buffer layer determination unit 52, configured to determine a first centerline buffer layer corresponding to the road centerline layer, where the first centerline buffer layer is determined according to a first buffer width corresponding to the geometric centerline of each road;

[0169] A pipeline length determination unit 53, 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;

[0170] A coverage rate calculation unit 54, configured to determine the pipeline coverage rate of the drainage unit according to the effective road network centerline length and the actual road centerline length of the realized plan.

[0171] It should be noted that the pipeline coverage rate evaluation device provided by the present invention, when specifically operating, can execute the pipeline coverage rate evaluation method described in any of the above embodiments, and this embodiment will not be elaborated here.

[0172] Compared with the existing devices related to pipeline coverage rate estimation and pipeline capacity evaluation, the pipeline coverage rate evaluation device provided by the present invention can effectively enhance the accuracy of coverage rate statistics by analyzing the effective road network centerline length covered by the pipeline, and provides a more scientific, reasonable, and easy-to-operate statistical device for the management decision-making layer.

[0173] Figure 6 is a schematic structural diagram of the pipeline drainage capacity evaluation device provided by the present invention. As Figure 6 shown, it mainly includes but is not limited to:

[0174] A drainage unit screening unit 61, configured to run the pipeline coverage rate evaluation method provided in any of the above embodiments to determine the pipeline coverage rate within the area to be evaluated, and set each drainage unit with a pipeline coverage rate greater than a first preset threshold as a target drainage unit;

[0175] A theoretical drainage capacity evaluation unit 62, configured to determine the theoretical drainage capacity of each of the target drainage units;

[0176] A physical drainage capacity evaluation unit 63, configured to determine the physical drainage capacity of the target drainage unit according to the pipeline construction age information of each of the determined target drainage units;

[0177] 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;

[0178] A pipeline capacity comprehensive evaluation unit 65, configured to determine the pipeline drainage capacity evaluation information within the area to be evaluated according to the comprehensive drainage capacity of all the target drainage units within the area to be evaluated.

[0179] It should be noted that the pipeline drainage capacity evaluation device provided by the present invention, during specific operation, can execute the pipeline drainage capacity evaluation method described in any of the above embodiments, and details thereof are not elaborated in this embodiment.

[0180] The pipeline drainage capacity evaluation device provided by the present invention, after screening out the target drainage units with basically qualified coverage rates, obtains the theoretical drainage capacity of the pipe segments through numerical simulation, and evaluates the theoretical drainage capacity of the drainage units based on the proportion of the service area of the pipe segments. Further, after combining information such as the service life of the pipeline to obtain the physical drainage capacity, the comprehensive drainage capacity of the drainage units is obtained, which can more scientifically and reasonably reflect the drainage capacity of the pipeline and the drainage units from two dimensions of hydraulic performance and structural attributes, and is beneficial to improving the scientificity of the decision-making for the construction of the drainage pipe network.

[0181] Figure 7 is a schematic structural diagram of an electronic device provided by the present invention. As Figure 7 shown, the electronic device may include: a processor 710, a communication interface 720, a memory 730, and a communication bus 740. Among them, the processor 710, the communication interface 720, and the memory 730 communicate with each other through the communication bus 740. The processor 710 can call the logical instructions in the memory 730 to execute the pipeline coverage rate evaluation method, and the method includes: determining a road center line layer according to the road network data of the drainage unit, where the road center line layer is composed of the geometric center lines of all roads within the drainage unit; determining a first center line buffer layer corresponding to the road center line layer, where the first center line buffer layer is determined according to the first buffer width corresponding to the geometric center line of each road; determining the effective road network center line length based on the first center line buffer layer and the pipeline data layer of the drainage unit; and determining the pipeline coverage rate of the drainage unit according to the effective road network center line length and the actual road center line length that has been implemented in the plan.

[0182] Alternatively, a pipeline drainage capacity evaluation method is executed, which includes: determining the pipeline coverage rate within the area to be evaluated based on any of the pipeline coverage rate evaluation methods described above, and setting each drainage unit with a pipeline coverage rate 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 the target drainage units according to the pipeline construction age information of each of the target drainage units; 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; and determining the pipeline drainage capacity evaluation information within the area to be evaluated according to the comprehensive drainage capacity of all the target drainage units within the area to be evaluated.

[0183] In addition, when the logical instructions in the above-mentioned memory 730 are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or a part of this technical solution can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0184] On the other hand, the present invention also provides a computer program product. The computer program product includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by a computer, the computer can execute the pipeline coverage rate evaluation method, which includes: determining a road centerline layer according to the road network data of the drainage unit, where the road centerline layer is composed of the geometric centerlines of all roads within the drainage unit; determining a first centerline buffer layer corresponding to the road centerline layer, where the first centerline buffer layer is determined according to the first buffer width corresponding to the geometric centerline of each road; determining the 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 rate of the drainage unit according to the effective road network centerline length and the actual road centerline length that has been implemented in the plan.

[0185] Alternatively, execute a pipeline drainage capacity evaluation method, which includes: determining the pipeline coverage rate in the area to be evaluated based on any of the pipeline coverage rate evaluation methods described above, and setting each drainage unit with a pipeline coverage rate greater than a first preset threshold as a target drainage unit; determining the theoretical drainage capacity of each target drainage unit; determining the physical drainage capacity of the target drainage unit according to the pipeline construction age information of each determined target drainage unit; determining 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; and determining 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.

[0186] In another aspect, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it implements a method for evaluating the pipeline coverage rate, which includes: determining a road center line layer according to the road network data of the drainage unit, where the road center line layer is composed of the geometric center lines of all roads in the drainage unit; determining a first center line buffer layer corresponding to the road center line layer, where the first center line buffer layer is determined according to the first buffer width corresponding to the geometric center line of each road; determining the effective road network center line length based on the first center line buffer layer and the pipeline data layer of the drainage unit; and determining the pipeline coverage rate of the drainage unit according to the effective road network center line length and the actual road center line length of the realized plan.

[0187] Alternatively, execute a pipeline drainage capacity evaluation method, which includes: determining the pipeline coverage rate in the area to be evaluated based on any of the pipeline coverage rate evaluation methods described above, and setting each drainage unit with a pipeline coverage rate greater than a first preset threshold as a target drainage unit; determining the theoretical drainage capacity of each target drainage unit; determining the physical drainage capacity of the target drainage unit according to the pipeline construction age information of each determined target drainage unit; determining 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; and determining 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.

[0188] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. A person of ordinary skill in the art can understand and implement it without creative work.

[0189] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on such an understanding, the essence of the above technical solution, or the part that contributes to the prior art, can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to enable 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.

[0190] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for evaluating pipeline drainage capacity, characterized in that: include: Determine the pipeline coverage rate in the area to be evaluated, 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; Determining pipeline drainage capacity assessment information within the area to be assessed based on the comprehensive drainage capacity of all the target drainage units within the area to be assessed; 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 to the theoretical drainage capacity of the target drainage unit; The pipeline coverage is evaluated based on 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.

2. The pipeline drainage capacity evaluation method according to claim 1, 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.

3. The pipeline drainage capacity evaluation method according to claim 2, 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.

4. The pipeline drainage capacity evaluation method according to claim 1, characterized in that: The comprehensive drainage capacity is determined based on the product between the theoretical drainage capacity and the physical drainage capacity.

5. The pipeline drainage capacity 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.

6. The pipeline drainage capacity 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.

7. The pipeline drainage capacity evaluation method according to claim 1, characterized in that: The pipeline coverage rate is based on the effective road network centerline length and the actual road centerline length.

8. A pipeline drainage capacity assessment device, characterized in that: include: A drainage unit screening unit, used to determine the pipeline coverage rate in the area to be evaluated, 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, used to determine the theoretical drainage capacity of each of the target drainage units; Wherein, determining 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 to the theoretical drainage capacity of the target drainage unit; 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; A pipeline capacity comprehensive evaluation unit, 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; The drainage unit screening unit determines the pipeline coverage rate based on 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.

9. 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 drainage capacity evaluation method according to any one of claims 1 to 7 is implemented.

10. 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 drainage capacity evaluation method according to any one of claims 1 to 7 is implemented.

11. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the pipeline drainage capacity evaluation method according to any one of claims 1 to 7 is implemented.

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