Urban drainage system update planning scheme evaluation method and related equipment

Abstract

The invention belongs to the technical field of urban planning, and discloses an urban drainage system updating planning scheme evaluation method and related equipment, and the method comprises the steps: obtaining the current drainage system data of a target area, building a current situation and future drainage system model, building a rainstorm pattern of a plurality of recurrence periods, simulating a waterlogging condition, and comparing simulation results for evaluation. Through model establishment, waterlogging condition simulation and comparative analysis, rationality and effectiveness of the urban drainage system update planning scheme are evaluated scientifically, systematically and quantitatively, and rationality and effectiveness of the urban drainage system update planning scheme can be evaluated scientifically, systematically and quantitatively. The urban drainage system updating planning method can comprehensively consider various factors such as a current drainage system, a future planning scheme and various rainfall scenes, and provides reliable decision support for planners through model simulation and data analysis, so that the scientificity and effectiveness of urban drainage system updating planning are improved, and challenges brought by urban development and climate changes are better coped with.

Description

Technical Field

[0001] The present application relates to the field of urban planning technology, and in particular to an urban drainage system renewal planning scheme evaluation method and related equipment. Background Art

[0002] In the urban renewal planning work, the urban drainage system renewal planning is a crucial link. A good urban drainage system renewal planning can effectively reduce or even avoid the occurrence of urban waterlogging, thereby reducing the economic losses caused by urban waterlogging. The design and planning of the urban drainage system directly affects the city's flood control and drainage capacity, and is related to the safety of life and property of urban residents and the sustainable development of the city.

[0003] However, the current urban drainage system renewal planning work mainly relies on manual experience. This method has obvious limitations: the rationality of the planning results is highly dependent on the personal experience and judgment of the planners, which can easily lead to the planning scheme being unscientific and unreasonable. Due to the lack of objective and systematic evaluation standards, it is difficult to accurately evaluate the actual effect of the planning scheme. At the same time, manual planning is difficult to fully consider the mutual influence between the various elements of the complex urban drainage system, and may ignore certain key factors, resulting in the planning scheme failing to achieve the expected results after implementation.

[0004] In addition, traditional planning methods are unable to cope with the new challenges brought about by rapid urban development. With the acceleration of urbanization, the impervious area increases, the surface runoff increases, and the water supply and drainage system is under greater pressure. Climate change also leads to frequent extreme weather events, and traditional planning methods are unable to adapt to these new changes.

[0005] In view of the above problems, the existing technology needs to be improved. There is an urgent need for a scientific, systematic and quantifiable urban drainage system renewal planning scheme evaluation method to objectively evaluate the rationality and effectiveness of the planning scheme. This method should be able to comprehensively consider multiple factors such as the current drainage system, future planning schemes, and various rainfall scenarios, and provide reliable decision-making support for planners through model simulation and data analysis, thereby improving the scientificity and effectiveness of urban drainage system renewal planning and better responding to the challenges brought by urban development and climate change. Summary of the invention

[0006] The purpose of this application is to provide an urban drainage system renewal planning scheme evaluation method and related equipment, which can scientifically, systematically and quantifiably evaluate the rationality and effectiveness of urban drainage system renewal planning schemes, provide reliable decision-making support for planners, and thus improve the scientificity and effectiveness of urban drainage system renewal planning.

[0007] In a first aspect, the present application provides a method for evaluating an urban drainage system renewal planning scheme, comprising the steps of: A1. Obtaining current drainage system data of the target area to establish a current drainage system model of the target area; A2. Establish a future drainage system model for the target area based on the current drainage system model and the urban drainage system renewal plan; A3. Establishing multiple rainstorm patterns with return periods in the target area; A4. using the current drainage system model and the future drainage system model to simulate the waterlogging situation of the target area corresponding to the rainstorm type of each return period; A5. Compare the simulation results of the current drainage system model and the future drainage system model, and conduct a rationality assessment on the urban drainage system renewal plan.

[0008] By establishing models, simulating urban waterlogging conditions and conducting comparative analysis, the rationality and effectiveness of urban drainage system renewal planning schemes can be evaluated scientifically, systematically and quantifiably. It can also comprehensively consider multiple factors such as the existing drainage system, future planning schemes, and various rainfall scenarios. Through model simulation and data analysis, it can provide planners with reliable decision-making support, thereby improving the scientificity and effectiveness of urban drainage system renewal planning and better responding to the challenges brought about by urban development and climate change.

[0009] Preferably, the drainage system data includes basic geographic data, pipe network data, river data and monitoring data; The basic geographic data include remote sensing images, surface elevation data, underlying surface GIS data, land use planning maps and topographic maps; The pipe network data includes pipe network node data and drainage pipe generalization data; The river data includes river plan distribution data, river cross-sectional shape data, hydraulic structure distribution data and hydraulic structure performance parameters; The monitoring data includes rainfall monitoring data and drainage monitoring data.

[0010] These data cover geography, pipe networks, rivers, monitoring and other aspects, providing comprehensive data support for establishing accurate drainage system models.

[0011] Preferably, in step A1, the step of establishing the current drainage system model of the target area includes: Based on the basic geographic data, pipe network data and river data in the current drainage system data, the initial status quo drainage system model is constructed using hydraulic model software; According to the monitoring data in the current drainage system data, the initial status quo drainage system model is calibrated to optimize the model parameters and obtain the status quo drainage system model of the target area.

[0012] This method combines static data and dynamic data to establish a current drainage system model that reflects the physical characteristics of the actual drainage system and is consistent with the actual operating data.

[0013] Preferably, step A2 comprises: According to the urban drainage system update planning scheme, obtaining updated drainage system data; Based on the basic geographic data, pipe network data and river data in the updated drainage system data, the initial future drainage system model is constructed using hydraulic model software; According to the model parameters of the current drainage system model, the model parameters of the initial future drainage system model are adjusted to obtain the future drainage system model of the target area.

[0014] Preferably, step A3 comprises: Constructing a rainstorm intensity model for the target area in multiple return periods based on historical rainfall data of the target area; Based on the preset rain pattern type, the rainstorm intensity model of each return period is used to calculate the rainfall in each time period of the rainstorm rain pattern of the corresponding return period to obtain the rainstorm rain pattern of each return period.

[0015] Preferably, step A4 comprises: The rainstorm patterns of each return period are respectively used as rainfall parameters of the rainfall event, and the current drainage system model is used to perform operation simulation to obtain the waterlogging situation of the current drainage system model corresponding to the rainstorm patterns of each return period; The rainstorm types in each return period are respectively used as rainfall parameters of rainfall events, and the future drainage system model is used to perform operation simulation to obtain the waterlogging situation of the future drainage system model corresponding to the rainstorm types in each return period.

[0016] Preferably, step A5 comprises: Calculating the total drainage efficiency score of the current urban drainage system according to the waterlogging conditions of the torrential rain types in each of the return periods according to the current drainage system model; and calculating the total drainage efficiency score of the future urban drainage system according to the waterlogging conditions of the torrential rain types in each of the return periods according to the future drainage system model; Compare the total drainage efficiency score of the current urban drainage system with the total drainage efficiency score of the future urban drainage system to obtain the total drainage efficiency improvement score; Comparing the waterlogging conditions of the current drainage system model corresponding to the torrential rain types of each return period with the waterlogging conditions of the future drainage system model corresponding to the torrential rain types of each return period, and obtaining a single drainage efficiency improvement score corresponding to the torrential rain types of each return period; The rationality score of the urban drainage system renewal planning scheme is calculated based on the total drainage efficiency improvement score and each individual drainage efficiency improvement score.

[0017] In a second aspect, the present application provides an urban drainage system renewal planning scheme evaluation device, comprising: The first model building module is used to obtain the current drainage system data of the target area to build a current drainage system model of the target area; The second model building module is used to build a future drainage system model of the target area according to the current drainage system model and the urban drainage system update planning scheme; A rainstorm pattern establishment module, used to establish rainstorm patterns of multiple return periods in the target area; A simulation operation module, used to simulate the waterlogging situation of the target area corresponding to the rainstorm type of each return period using the current drainage system model and the future drainage system model respectively; The evaluation module is used to compare the simulation results of the current drainage system model and the future drainage system model, and to evaluate the rationality of the urban drainage system renewal planning scheme.

[0018] In a third aspect, the present application provides an electronic device comprising a processor and a memory, wherein the memory stores a computer program executable by the processor, and when the processor executes the computer program, it runs the steps in the urban drainage system renewal planning scheme evaluation method as described above.

[0019] In a fourth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, runs the steps in the urban drainage system renewal planning scheme evaluation method as described above.

[0020] Beneficial effects: The urban drainage system renewal planning scheme evaluation method and related equipment provided in this application include obtaining the current drainage system data of the target area, establishing the current and future drainage system models, establishing rainstorm patterns with multiple return periods, simulating waterlogging conditions, and comparing the simulation results for evaluation. By establishing models, simulating waterlogging conditions and conducting comparative analysis, the rationality and effectiveness of the urban drainage system renewal planning scheme are scientifically, systematically and quantifiably evaluated. The rationality and effectiveness of the urban drainage system renewal planning scheme can be scientifically, systematically and quantifiably evaluated, and multiple factors such as the current drainage system, future planning schemes, and various rainfall scenarios can be comprehensively considered. Through model simulation and data analysis, reliable decision-making support is provided to planners, thereby improving the scientificity and effectiveness of urban drainage system renewal planning and better responding to the challenges brought about by urban development and climate change. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A flowchart of a method for evaluating an urban drainage system renewal planning scheme provided in an embodiment of the present application.

[0022] Figure 2 A schematic diagram of the structure of an urban drainage system renewal planning scheme evaluation device provided in an embodiment of the present application.

[0023] Figure 3 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0024] Figure 4 This is an exemplary underlying surface distribution map.

[0025] Figure 5 An exemplary drainage pipeline distribution diagram.

[0026] Figure 6 A schematic diagram of an exemplary existing drainage system model.

[0027] Explanation of reference numerals: 1. First model building module; 2. Second model building module; 3. Rainstorm type building module; 4. Simulation operation module; 5. Evaluation module; 301. Processor; 302. Memory; 303. Communication bus. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0029] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0030] Please refer to Figure 1 , Figure 1 A method for evaluating an urban drainage system renewal planning scheme in some embodiments of the present application includes the following steps: A1. Obtain the current drainage system data of the target area to establish the current drainage system model of the target area; A2. Establish the future drainage system model of the target area based on the current drainage system model and the urban drainage system renewal plan; A3. Establish rainstorm patterns with multiple return periods in the target area; A4. Use the current drainage system model and the future drainage system model to simulate the waterlogging situation in the target area corresponding to the rainstorm types of each return period; A5. Compare the simulation results of the current drainage system model and the future drainage system model, and evaluate the rationality of the urban drainage system renewal planning scheme.

[0031] By establishing models, simulating urban waterlogging conditions and conducting comparative analysis, the rationality and effectiveness of urban drainage system renewal planning schemes can be evaluated scientifically, systematically and quantifiably. It can also comprehensively consider multiple factors such as the existing drainage system, future planning schemes, and various rainfall scenarios. Through model simulation and data analysis, it can provide planners with reliable decision-making support, thereby improving the scientificity and effectiveness of urban drainage system renewal planning and better responding to the challenges brought about by urban development and climate change.

[0032] The evaluation method of this application has obvious advantages over traditional manual experience evaluation. By establishing a digital model and simulating a variety of rainstorm scenarios, it provides a more comprehensive and objective evaluation basis. This method not only takes into account regular rainfall, but also evaluates the system performance under extreme weather conditions, which helps to improve the city's flood control and drainage capabilities. Quantitative simulation results enable decision makers to intuitively compare the effects of different options, facilitating the optimization of design and resource allocation. In addition, this method can predict the performance of future drainage systems, which is conducive to the formulation of long-term planning strategies and improving urban resilience.

[0033] Compared with the existing technology, the method of this application is innovative: it integrates the current and future models, and through comparative analysis, it intuitively demonstrates the improvement effect of the planning scheme. Multiple current rainstorm patterns are used for simulation to comprehensively evaluate the performance of the drainage system under different rainfall intensities, improving the comprehensiveness and reliability of the evaluation. This method combines qualitative analysis with quantitative simulation, taking into account the experience and judgment of professionals, and providing objective data support, effectively balancing subjective evaluation and objective analysis.

[0034] By applying the evaluation method of this application, urban planners can evaluate drainage system renewal planning schemes in a more scientific and systematic manner, effectively identify potential problems, and optimize design schemes, thereby improving the overall performance of urban drainage systems, reducing the risk of urban waterlogging, and providing strong support for urban sustainable development.

[0035] Among them, the target area is the area corresponding to the urban drainage system renewal planning scheme to be evaluated, which can be a city, a district under the jurisdiction of a city, a county or a town or street area.

[0036] Specifically, drainage system data includes basic geographic data, pipe network data, river data and monitoring data. These data cover multiple aspects such as geography, pipe network, river and monitoring, providing comprehensive data support for establishing an accurate drainage system model.

[0037] Among them, basic geographic data include remote sensing images, surface elevation data, underlying surface GIS data, land use planning maps and topographic maps. Remote sensing images can be obtained by satellite remote sensing or aerial photography. The resolution can be selected according to needs, usually between 0.5-5 meters; remote sensing images are used to determine the current construction status of the target area. Surface elevation data can be obtained by LiDAR technology with an accuracy of up to centimeters. Surface elevation data is used to divide the watershed and extract the slope of the watershed. The underlying surface GIS data can be obtained through field surveys combined with remote sensing image interpretation, including information such as impervious surfaces, green spaces, and water bodies. The underlying surface GIS data is used to analyze the proportion of impervious areas in the watershed and the volume of depressions. Land use planning maps and topographic maps can be obtained from relevant departments, such as land use planning maps in the control planning stage. Land use planning maps and topographic maps are used to provide references for the division and parameter setting of watersheds in drainage system models (current drainage system models and future drainage system models).

[0038] Among them, the pipe network data includes pipe network node data and drainage pipe generalization data. Pipe network data can be obtained in combination with pipe network drawings and / or field surveys. Pipe network node data includes the location and elevation information of inspection wells, discharge outlets, etc. The drainage pipe generalization data includes information such as pipe diameter, pipe length, slope, etc. The pipe network data is used to construct the pipe network topology relationship and establish the flow generation and convergence relationship model of the drainage process.

[0039] Among them, the river data includes river plane distribution data, river cross-sectional shape data, hydraulic structure distribution data and hydraulic structure performance parameters. The river plane distribution data can be obtained through aerial survey or field measurement. The river cross-sectional shape data usually measures a section every 50m-100m, recording information such as water depth and riverbed elevation. The river plane distribution data and river cross-sectional shape data are used to establish a one-dimensional river model. The distribution data and performance parameters of hydraulic structures need to be obtained through field investigation and reference to relevant design data. For example, hydraulic structures include at least one of pumps, gates, and weirs. The distribution data of hydraulic structures and the performance parameters of hydraulic structures are used to construct a one-dimensional pipe network and a river coupling model.

[0040] Among them, monitoring data includes rainfall monitoring data and drainage monitoring data. Rainfall monitoring data can be obtained through automatic rain gauges. Drainage monitoring data can be obtained by installing flow meters and water level meters at key nodes, such as setting up monitoring points at major discharge outlets and important pipe network nodes. Rainfall monitoring data and drainage monitoring data are used to calibrate the drainage system model.

[0041] The comprehensive use of these data enables this application to establish a comprehensive and accurate current drainage system model. This model can not only reflect the actual drainage conditions in the target area, but also serve as a benchmark for evaluating urban drainage system renewal planning schemes. By comparing the models before and after the update, the rationality and effectiveness of the planning scheme can be objectively evaluated.

[0042] Specifically, in step A1, the steps of establishing the current drainage system model of the target area include: Based on the basic geographic data, pipe network data and river data in the current drainage system data, the initial status quo drainage system model is constructed using hydraulic model software; According to the monitoring data in the current drainage system data, the initial status quo drainage system model is calibrated to optimize the model parameters and obtain the status quo drainage system model of the target area.

[0043] This method, by combining static data and dynamic data, can establish a current drainage system model that reflects the physical characteristics of the actual drainage system and is consistent with the actual operating data. When constructing the initial model, a variety of hydraulic model software can be used, such as SWMM, InfoWorks ICM or MIKE URBAN. These software can generate a preliminary drainage system model based on the input basic geographic data, pipe network data and river data. Preferably, the InfoWorks ICM hydraulic model software can be used for model construction; this hydraulic model software can fully simulate the urban rainwater circulation system, realize the integration of the urban drainage pipe network system model and the river model, and can simulate the interaction between the underground drainage pipe network system and the surface receiving water body.

[0044] The construction method of the initial status quo drainage system model (and the subsequent initial future drainage system model) is determined by the specific hydraulic model software selected, and all are existing technologies. For example, for the InfoWorks ICM hydraulic model software, the modeling process includes: 1) Importing the pipe network data, catchment area data (obtained according to the division of basic geographic data), underlying surface GIS data, and river data into the InfoWorks ICM hydraulic model software; 2) Setting rainfall data, inputting the model parameters of the target area's rainstorm intensity model (see below for related introduction) into the model rainfall event; 3) Creating a one-dimensional pipe network model, and setting boundary conditions for the discharge port at the end of the pipe network; 4) Creating a ground TIN model, importing the surface elevation data into the model ground TIN model to form an elevation TIN model; 5) Opening the one-dimensional pipe network model, adding the created elevation TIN model to the model window of the one-dimensional pipe network model, creating a 2D interval, importing blank areas into the 2D interval (taking the roof as the blank area), and then meshing the 2D interval. For example Figure 4is an exemplary underlying surface distribution map of the target area, and the drainage pipeline distribution map of the target area is as follows: Figure 5 As shown in the figure, the current drainage system model constructed in the InfoWorks ICM hydraulic model software through the above process is as follows Figure 6 shown.

[0045] In the model calibration stage, the rainfall monitoring data of the most recent historical years (for example, the past three years, but not limited to this) and the drainage monitoring data (including water level and flow, etc.) of key nodes (including waterlogged points) can be used to select several typical rainfall events (for example, 10, but not limited to this), and the initial status drainage system model is used to simulate the selected typical rainfall events. The drainage data (including water level and flow, etc.) of each key node are extracted from the simulation results, and the average error is calculated based on the drainage data of each key node and the corresponding drainage monitoring data (the corresponding average error is calculated for each water level and flow), and the model parameters of the initial status drainage system model are iteratively optimized based on the average error (a variety of optimization algorithms can be used for optimization, such as genetic algorithm, particle swarm optimization algorithm or simulated annealing algorithm, etc.) until the average error is within a preset error threshold (the average errors of water level and flow must be within the preset error threshold, and the preset error threshold can be set according to actual needs, such as 5%, but not limited to this). Among them, at least one of the model parameters such as pipeline roughness coefficient, catchment area impermeability, surface Manning coefficient, Horton infiltration model parameters, etc. can be iteratively optimized.

[0046] Compared with traditional modeling methods that only rely on static data or empirical parameters, the method proposed in this application has obvious advantages. Traditional methods are often difficult to accurately reflect the dynamic characteristics of the drainage system in actual operation, which easily leads to a large deviation rate between the model and the actual situation. The method of this application can significantly improve the accuracy and reliability of the model by introducing monitoring data for model calibration. This can not only better reflect the actual drainage conditions in the target area, but also provide more reliable basic data and model support for subsequent planning and evaluation.

[0047] Further, step A2 comprises: A201.According to the urban drainage system update plan, obtain updated drainage system data; A202. Based on the basic geographic data, pipe network data and river data in the updated drainage system data, use hydraulic model software to construct an initial future drainage system model; A203. According to the model parameters of the current drainage system model, the model parameters of the initial future drainage system model are adjusted to obtain the future drainage system model of the target area.

[0048] Among them, in step A201, when obtaining the updated drainage system data, multiple methods can be used. For example, the updated basic geographic data, pipe network data and river data can be obtained through field research, remote sensing technology or planning documents provided by relevant departments. These data may include information such as the layout of newly built or renovated drainage pipe networks, the location and capacity of newly added regulation and storage facilities, and river regulation projects.

[0049] Among them, in step A202, the process of constructing the initial future drainage system model can refer to the process of constructing the initial current drainage system model in the previous text, and will not be described in detail here.

[0050] Adjusting the parameters of the initial future drainage system model is a key step. Here, the parameter migration method can be used to apply the calibrated parameters in the current drainage system model, such as pipe roughness coefficient, watershed impermeability, surface Manning coefficient, Horton infiltration model parameters, etc., to the future drainage system model. For newly added facilities (such as pipe networks, pumping stations, storage tanks, etc.), preliminary settings can be made based on design parameters and empirical values ​​of similar facilities. In addition, the impact of future climate change, land use change and other factors on parameters can be considered and appropriate adjustments can be made.

[0051] There is a close relationship between the three steps of step A201-step A203. The updated drainage system data obtained directly determines the basic framework and structure of the initial future drainage system model. The parameters of the current drainage system model provide a reliable reference for the future model, ensuring the continuity and consistency of the model. In this way, the application not only takes into account the latest planning scheme, but also utilizes the experience of the existing model, thereby improving the accuracy and reliability of the future drainage system model.

[0052] This application can build a future drainage system model more comprehensively and accurately through systematic steps and the application of professional software. In particular, in terms of parameter adjustment, by drawing on the parameters of the current model, the reliability of the future model is greatly improved. This method not only improves modeling efficiency, but also better reflects the actual situation of the drainage system, thereby providing more reliable technical support for the evaluation of urban drainage system renewal planning schemes.

[0053] Specifically, step A3 includes: A301. Based on the historical rainfall data of the target area, a rainstorm intensity model for the target area in multiple return periods is constructed; A302. Based on the preset rain pattern type, the rainstorm intensity model of each return period is used to calculate the rainfall in each time period of the rainstorm pattern of the corresponding return period to obtain the rainstorm pattern of each return period.

[0054] Through these two steps, the program can scientifically construct multiple rainstorm patterns with different return periods that meet the characteristics of the target area, providing reliable data support for the evaluation of urban drainage system renewal planning schemes.

[0055] When constructing a rainstorm intensity model, a variety of methods can be used, such as extreme value distribution method, empirical formula method or artificial neural network method. Taking the extreme value distribution method as an example, the annual maximum value sequence can be selected and fitted using the P-III distribution. The specific steps include: collecting long-term (usually not less than 30 years) rainfall observation data; extracting the annual maximum value sequence; calculating statistical parameters (mean, coefficient of variation, coefficient of skewness); fitting the P-III distribution curve; calculating the corresponding rainfall intensity according to different return periods. Alternatively, extract the historical rainfall data corresponding to each return period from the historical rainfall data of the target area, and then use the following formula to fit the rainstorm intensity model for each return period based on the historical rainfall data corresponding to each return period: ; Where P represents the return period, represents the rainfall intensity with a return period of P, t is the rainfall duration, , and are fitting parameters (obtained through fitting).

[0056] The return period can be selected according to actual needs, for example, including part or all of 2 years, 3 years, 5 years, 10 years, 20 years, 30 years, 40 years, 50 years, 60 years, 70 years, 80 years, 90 years, and 100 years. The return period of 2 years means that the corresponding rainfall situation is a rainfall situation that occurs once every 2 years, and the meanings of other return periods are similar.

[0057] Among them, the preset rain type can be selected from Chicago rain type, SCS rain type or measured rain type, etc. Taking the Chicago rain type as an example, the calculation process of its rainstorm type includes: determining the duration of the rainstorm and the time step (such as 120 minutes, 5 minutes step); using the rainstorm intensity formula to calculate the rainfall intensity corresponding to the rainstorm duration; calculating the total rainfall according to the rainstorm duration and rainfall intensity (the total rainfall is obtained by multiplying the rainstorm duration and rainfall intensity); calculating the rainfall in each time period (each time step is a time period) according to the Chicago rain type formula and the rain peak position coefficient (which can be obtained through the historical rainfall data statistics of the target area). For example, for a rainstorm that occurs once every 10 years (i.e., a return period of 10 years), the corresponding rainstorm intensity model is 22.881 / (t+9.354)^0.684, the rainstorm lasts for 120 minutes, the time step is 5 minutes, and the rain peak position coefficient is 0.29. The total rainfall calculated by the above method is 98.673 mm (substitute t=120 minutes into the rainstorm intensity model to calculate the rainstorm intensity, and then multiply the rainstorm intensity by 120 minutes to get the total rainfall). Based on the time step (5 minutes) and the rain peak position coefficient (i.e., 0.29, the rain peak position coefficient determines the period to which the maximum rainfall in a single period belongs. 0.29 multiplied by 120 minutes equals 34.8 minutes, which belongs to the 30-35 minute period. Therefore, the rainfall in the 30-35 minute period is the largest), the total rainfall is allocated to each period according to the Chicago rain type (each time step is a period), and the rainfall in each period is shown in Table 1.

[0058] Table 1 minute Rainfall / mm minute Rainfall / mm minute Rainfall / mm 0-5 1.165 40-45 8.556 80-85 1.884 5-10 1.426 45-50 6.191 85-90 1.703 10-15 1.836 50-55 4.777 90-95 1.553 15-20 2.550 55-60 3.852 95-100 1.426 20-25 4.059 60-65 3.211 100-105 1.317 25-30 8.735 65-70 2.739 105-110 1.224 30-35 20.665 70-75 2.383 110-115 1.145 35-40 13.098 75-80 2.106 115-120 1.072 Among them, the rainstorm type in each recurrence period may include a short-duration rainstorm type and a long-duration rainstorm type.

[0059] By considering both short-duration and long-duration rainstorm types, it is possible to more comprehensively evaluate the performance of the drainage system under different rainfall characteristics. Short-duration rainstorms usually have high rainfall intensity but short duration, which can test the instantaneous drainage capacity of the drainage system. Long-duration rainstorms have relatively low rainfall intensity but long duration, which can evaluate the continuous drainage capacity of the drainage system.

[0060] In specific implementation, the short-duration rainstorm type can select a rainfall process of 1 hour, 2 hours or 3 hours (i.e. the corresponding rainstorm duration is 1 hour, 2 hours or 3 hours), while the long-duration rainstorm type can select a rainfall process of 6 hours, 12 hours or 24 hours (i.e. the corresponding rainstorm duration is 6 hours, 12 hours or 24 hours). Such a combination can comprehensively cover different types of rainfall events. For example, for a specific recurrence period (such as once in 10 years), 2-hour and 24-hour rainstorm types can be established at the same time.

[0061] The short-duration rainstorm type can be constructed using the Chicago rain type method (that is, the corresponding preset rain type is the Chicago rain type), which can better reflect the characteristics of short-duration heavy rainfall. The long-duration rainstorm type can be constructed using the SCS rain type method or the Huff rain type method (that is, the corresponding preset rain type is the SCS rain type or the Huff rain type), which are more suitable for describing the characteristics of long-term rainfall. By using different rain type construction methods, the temporal distribution characteristics of different types of rainfall can be simulated more accurately.

[0062] During the assessment process, short-duration and long-duration rainstorm patterns are input into the current drainage system model and the future drainage system model for simulation. This method can comprehensively evaluate the performance of the drainage system in dealing with different types of rainfall, thereby identifying the strengths and weaknesses of the system in different situations.

[0063] For example, through the simulation of short-duration rainstorms, the performance of the drainage system in dealing with sudden heavy rainfall can be evaluated, such as the instantaneous drainage capacity of the pipe network, the rapid response of waterlogged points, etc. The simulation of long-duration rainstorms can evaluate the performance of the system under continuous rainfall, such as the regulation and storage capacity of water storage facilities and the long-term operation effect of drainage pumping stations.

[0064] This method, which comprehensively considers both short-duration and long-duration rainstorm types, can more comprehensively reflect the various rainfall conditions that the drainage system may face in actual operation. It can not only evaluate the system's ability to cope with extreme rainfall, but also evaluate the system's long-term performance under normal rainfall conditions. This comprehensive assessment provides a solid foundation for the formulation of a more reasonable and effective drainage system renewal planning scheme.

[0065] In some embodiments, step A4 comprises: A401. Take the rainstorm type of each return period as the rainfall parameter of the rainfall event, use the current drainage system model to perform operation simulation, and obtain the waterlogging situation of the current drainage system model corresponding to the rainstorm type of each return period; A402. Take the rainstorm types in each return period as rainfall parameters of rainfall events, use the future drainage system model to perform operation simulation, and obtain the waterlogging situation of the future drainage system model corresponding to the rainstorm types in each return period.

[0066] By simulating the current and future drainage system models, the waterlogging conditions under heavy rains with different return periods are compared, which provides an objective basis for evaluating the urban drainage system renewal planning scheme. By simulating the current and future drainage system models respectively, the performance difference of the drainage system before and after the renewal can be intuitively compared. Using heavy rain types with multiple return periods as input parameters, the performance of the drainage system under different rainfall intensities can be comprehensively evaluated. The waterlogging conditions obtained through simulation can be used to quantitatively analyze the improvement effect before and after the drainage system renewal.

[0067] In the specific implementation process, this application can use a variety of methods to achieve the simulation of the current and future drainage system models. For example, hydraulic model software (such as SWMM, InfoWorks ICM or MIKE URBAN, etc.) can be used to build and run the drainage system model. These software can simulate complex drainage network systems, including the operation of pipe networks, pumping stations, storage tanks and other facilities.

[0068] During the simulation process, different return periods can be set, such as 2-year, 5-year, 10-year, etc. For each return period, the corresponding rainstorm type is used as the input parameter of the rainfall event and input into the current and future drainage system models for simulation.

[0069] The simulation results can include multiple indicators, such as the network full pipe rate, node overflow at each key node, water depth and water area in each flooded area, etc. (i.e., the waterlogging situation includes these indicators). By comparing these indicators of the current and future models at various return periods, the effectiveness of the drainage system renewal planning scheme can be comprehensively evaluated.

[0070] Specifically, step A5 includes: A501. Calculate the total drainage efficiency score of the current urban drainage system based on the waterlogging conditions of the current drainage system model corresponding to the torrential rain types of each return period; and calculate the total drainage efficiency score of the future urban drainage system based on the waterlogging conditions of the future drainage system model corresponding to the torrential rain types of each return period; A502. Compare the total drainage efficiency score of the current urban drainage system with the total drainage efficiency score of the future urban drainage system to obtain the total drainage efficiency improvement score; A503. Compare the waterlogging conditions of the current drainage system model corresponding to the torrential rain types of each return period with the waterlogging conditions of the future drainage system model corresponding to the torrential rain types of each return period, and obtain the single drainage efficiency improvement score corresponding to the torrential rain types of each return period; A504. Calculate the rationality score of the urban drainage system renewal planning scheme based on the overall drainage efficiency improvement score and each individual drainage efficiency improvement score.

[0071] This evaluation method comprehensively considers the improvement effects in different aspects and can objectively reflect the rationality of the planning scheme. By converting qualitative evaluation into quantitative scores, the objectivity and comparability of the evaluation are improved. At the same time, the heavy rain conditions with different return periods are taken into account, making the evaluation results more comprehensive and reliable.

[0072] Among them, in step A501, based on the waterlogging situation of the current drainage system model corresponding to the rainstorm type in each return period, the drainage efficiency score of the single rain type corresponding to the rainstorm type in each return period can be calculated according to the full pipe rate of the pipe network, the average overflow of the throttling point (calculated by the node overflow of each key node), the average water accumulation depth (calculated by the water accumulation depth of each water accumulation area), the maximum water accumulation depth, the total water accumulation area (calculated by the water accumulation area of ​​each water accumulation area) and the average water accumulation area of ​​a single water accumulation area (calculated by the water accumulation area of ​​each water accumulation area) corresponding to the rainstorm type in each return period (for example, the weighted sum of these parameters is calculated as the drainage efficiency score of the single rain type), and then based on the preset importance weight factor of each return period (which can be set according to actual needs, generally, the shorter the return period, the larger the corresponding preset importance weight factor), the weighted sum of the drainage efficiency scores of each single rain type is calculated as the total drainage efficiency score of the current urban drainage system. Similarly, the total drainage efficiency score of the future urban drainage system is calculated.

[0073] In step A502, the difference between the total drainage efficiency score of the future urban drainage system and the total drainage efficiency score of the current urban drainage system can be calculated, and then the difference can be used as the total drainage efficiency improvement score, or the corresponding first reference score can be obtained as the total drainage efficiency improvement score based on the difference range to which the difference belongs (for example, multiple difference ranges are set in advance, and a corresponding first reference score is assigned to each difference range, and the corresponding first reference score is obtained as the total drainage efficiency improvement score based on the difference range to which the actual difference belongs).

[0074] In step A503, the single rain type drainage efficiency score of the current drainage system model corresponding to the torrential rain type of each return period and the single rain type drainage efficiency score of the future drainage system model corresponding to the torrential rain type of each return period can be obtained (refer to step A501 for the specific process), which are respectively recorded as the first single rain type drainage efficiency score and the second single rain type drainage efficiency score, and the deviation rate between each first single rain type drainage efficiency score and the corresponding second single rain type drainage efficiency score is calculated, and then the corresponding second reference score is obtained according to the deviation rate range to which the deviation rate belongs as the single drainage efficiency improvement score of the torrential rain type of the corresponding return period (for example, multiple deviation rate ranges are set in advance, and a corresponding second reference score is assigned to each deviation rate range, and the corresponding second reference score is obtained according to the deviation rate range to which the actually obtained deviation rate belongs as the single drainage efficiency improvement score of the torrential rain type of the corresponding return period).

[0075] In step A504, the final rationality score can be calculated by weighted average method. For example, the total drainage efficiency improvement score can be assigned a weight of a first proportion (for example, 50%, but not limited thereto), and the individual drainage efficiency improvement score of each return period can be assigned a weight of a second proportion, wherein the sum of the first proportion and the second proportion is 1. The setting of weights can be adjusted according to the specific situation and evaluation objectives of the city. For example, if the city pays more attention to the improvement of the overall drainage efficiency, a higher weight can be given to the total drainage efficiency improvement score; if special attention is paid to the ability to cope with heavy rains in certain specific return periods, the weights of the individual drainage efficiency improvement scores corresponding to these return periods can be increased accordingly.

[0076] In addition, in step A504, a nonlinear weighted method may also be used to calculate the final rationality score. This method may better reflect the characteristics of decreasing or increasing marginal utility of certain indicators. For example, an exponential function or a logarithmic function may be used to transform each score and then perform a weighted sum.

[0077] Compared with traditional qualitative evaluation methods, the method of this application provides more objective and quantifiable evaluation results. Traditional methods often rely on expert experience, are easily affected by subjective factors, and it is difficult to accurately compare different planning schemes. The method of this application, by introducing specific numerical calculations and scoring mechanisms, can not only more accurately reflect the improvement effect of the planning scheme, but also facilitate horizontal comparison of multiple planning schemes, thereby providing stronger support for decision makers. In addition, the method of this application takes into account rainstorms with different recurrence periods, which is more comprehensive than the method that only considers a single design rainstorm. It can evaluate the performance of the planning scheme in dealing with rainstorms of different intensities, thereby better reflecting the comprehensive effect of the planning scheme. This comprehensive evaluation method helps to design a more robust and adaptable drainage system renewal planning scheme.

[0078] refer to Figure 2 The present application provides an urban drainage system renewal planning scheme evaluation device, comprising: The first model building module 1 is used to obtain the current drainage system data of the target area to build a current drainage system model of the target area (refer to step A1 above for details); The second model building module 2 is used to build a future drainage system model of the target area based on the current drainage system model and the urban drainage system update planning scheme (refer to step A2 above for details); The rainstorm pattern establishment module 3 is used to establish the rainstorm patterns of multiple return periods in the target area (refer to step A3 above for details); The simulation operation module 4 is used to simulate the waterlogging situation of the target area corresponding to the rainstorm type of each return period using the current drainage system model and the future drainage system model respectively (refer to the previous step A4 for details); Evaluation module 5 is used to compare the simulation results of the current drainage system model and the future drainage system model, and to evaluate the rationality of the urban drainage system renewal planning scheme (refer to step A5 above for details).

[0079] Please refer to Figure 3 , Figure 3 The present application provides a structural schematic diagram of an electronic device provided in an embodiment of the present application. The present application provides an electronic device, including: a processor 301 and a memory 302. The processor 301 and the memory 302 are interconnected and communicate with each other through a communication bus 303 and / or other forms of connection mechanisms (not shown). The memory 302 stores a computer program executable by the processor 301. When the electronic device is running, the processor 301 executes the computer program to execute the urban drainage system renewal planning scheme evaluation method in any optional implementation of the above-mentioned embodiment to achieve the following functions: obtaining the current drainage system data of the target area to establish a current drainage system model of the target area; establishing a future drainage system model of the target area according to the current drainage system model and the urban drainage system renewal planning scheme; establishing rainstorm types of multiple return periods in the target area; simulating the waterlogging situation of the target area corresponding to the rainstorm types of each return period using the current drainage system model and the future drainage system model respectively; comparing the simulation results of the current drainage system model and the future drainage system model, and evaluating the rationality of the urban drainage system renewal planning scheme.

[0080] An embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the urban drainage system renewal planning scheme evaluation method in any optional implementation of the above-mentioned embodiment is executed to achieve the following functions: obtaining the current drainage system data of the target area to establish a current drainage system model of the target area; establishing a future drainage system model of the target area according to the current drainage system model and the urban drainage system renewal planning scheme; establishing rainstorm types with multiple return periods in the target area; simulating the waterlogging situation of the target area corresponding to the rainstorm types with each return period using the current drainage system model and the future drainage system model respectively; and comparing the simulation results of the current drainage system model and the future drainage system model to evaluate the rationality of the urban drainage system renewal planning scheme.

[0081] Among them, the computer-readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable red-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk.

[0082] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0083] In addition, 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, and may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0084] Furthermore, the functional modules in the various embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

[0085] In this document, relational terms such as first and second, etc. are used merely to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0086] The above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for evaluating urban drainage system renewal planning scheme, characterized in that: Includes steps: A1. Obtaining current drainage system data of the target area to establish a current drainage system model of the target area; A2. Establish a future drainage system model for the target area based on the current drainage system model and the urban drainage system renewal plan; A3. Establishing multiple rainstorm patterns with return periods in the target area; A4. using the current drainage system model and the future drainage system model to simulate the waterlogging situation of the target area corresponding to the rainstorm type of each return period; A5. Compare the simulation results of the current drainage system model and the future drainage system model, and conduct a rationality assessment on the urban drainage system renewal plan.

2. The urban drainage system renewal planning scheme evaluation method according to claim 1 is characterized in that: The drainage system data includes basic geographic data, pipe network data, river data and monitoring data; The basic geographic data include remote sensing images, surface elevation data, underlying surface GIS data, land use planning maps and topographic maps; The pipe network data includes pipe network node data and drainage pipe generalization data; The river data includes river plan distribution data, river cross-sectional shape data, hydraulic structure distribution data and hydraulic structure performance parameters; The monitoring data includes rainfall monitoring data and drainage monitoring data.

3. The urban drainage system renewal planning scheme evaluation method according to claim 2 is characterized in that: In step A1, the step of establishing the current drainage system model of the target area includes: Based on the basic geographic data, pipe network data and river data in the current drainage system data, the initial status quo drainage system model is constructed using hydraulic model software; According to the monitoring data in the current drainage system data, the initial status quo drainage system model is calibrated to optimize the model parameters and obtain the status quo drainage system model of the target area.

4. The urban drainage system renewal planning scheme evaluation method according to claim 2 is characterized in that: Step A2 includes: According to the urban drainage system update planning scheme, obtaining updated drainage system data; Based on the basic geographic data, pipe network data and river data in the updated drainage system data, the initial future drainage system model is constructed using hydraulic model software; According to the model parameters of the current drainage system model, the model parameters of the initial future drainage system model are adjusted to obtain the future drainage system model of the target area.

5. The urban drainage system renewal planning scheme evaluation method according to claim 1 is characterized in that: Step A3 includes: Constructing a rainstorm intensity model for the target area in multiple return periods based on historical rainfall data of the target area; Based on the preset rain pattern type, the rainstorm intensity model of each return period is used to calculate the rainfall in each time period of the rainstorm rain pattern of the corresponding return period to obtain the rainstorm rain pattern of each return period.

6. The urban drainage system renewal planning scheme evaluation method according to claim 1 is characterized in that: Step A4 includes: The rainstorm patterns of each return period are respectively used as rainfall parameters of the rainfall event, and the current drainage system model is used to perform operation simulation to obtain the waterlogging situation of the current drainage system model corresponding to the rainstorm patterns of each return period; The rainstorm types in each return period are respectively used as rainfall parameters of rainfall events, and the future drainage system model is used to perform operation simulation to obtain the waterlogging situation of the future drainage system model corresponding to the rainstorm types in each return period.

7. The urban drainage system renewal planning scheme evaluation method according to claim 6 is characterized in that: Step A5 includes: Calculating the total drainage efficiency score of the current urban drainage system according to the waterlogging conditions of the torrential rain types in each of the return periods according to the current drainage system model; and calculating the total drainage efficiency score of the future urban drainage system according to the waterlogging conditions of the torrential rain types in each of the return periods according to the future drainage system model; Compare the total drainage efficiency score of the current urban drainage system with the total drainage efficiency score of the future urban drainage system to obtain the total drainage efficiency improvement score; Comparing the waterlogging conditions of the current drainage system model corresponding to the torrential rain types of each return period with the waterlogging conditions of the future drainage system model corresponding to the torrential rain types of each return period, and obtaining a single drainage efficiency improvement score corresponding to the torrential rain types of each return period; The rationality score of the urban drainage system renewal planning scheme is calculated based on the total drainage efficiency improvement score and each individual drainage efficiency improvement score.

8. An urban drainage system renewal planning scheme evaluation device, characterized in that: include: The first model building module is used to obtain the current drainage system data of the target area to build a current drainage system model of the target area; The second model building module is used to build a future drainage system model of the target area according to the current drainage system model and the urban drainage system update planning scheme; A rainstorm pattern establishment module, used to establish rainstorm patterns of multiple return periods in the target area; A simulation operation module, used to simulate the waterlogging situation of the target area corresponding to the rainstorm type of each return period using the current drainage system model and the future drainage system model respectively; The evaluation module is used to compare the simulation results of the current drainage system model and the future drainage system model, and to evaluate the rationality of the urban drainage system renewal planning scheme.

9. An electronic device, characterized in that: It comprises a processor and a memory, wherein the memory stores a computer program executable by the processor, and when the processor executes the computer program, it runs the steps in the urban drainage system renewal planning scheme evaluation method as described in any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by the processor, the steps of the urban drainage system renewal planning scheme evaluation method as described in any one of claims 1 to 7 are executed.

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