Comprehensive evaluation method for operation efficiency of drainage pipe network

Abstract

The invention relates to a comprehensive evaluation method for operation efficiency of a drainage pipe network. The method comprises the steps of establishing a drainage pipe network operation efficiency evaluation index system; determining the weight of each criterion; taking the indexes of all the criteria as an index layer, and determining the index weight of each index in the index layer; multiplying the index weight of each index by the weight of the criterion to which the index belongs to obtain a comprehensive weight of each index; according to a pre-formulated scoring standard, performing evaluation score assignment on each index to obtain an initial score of each index; establishing a two-dimensional coordinate system taking the comprehensive weight as an abscissa and the initial score as an ordinate, and dividing the two-dimensional coordinate system into a plurality of risk level range areas; constructing a piecewise function to calculate a final score of the index; and adding the final scores of all the indexes to obtain a comprehensive score of the operation efficiency of the drainage pipe network. According to the invention, comprehensive, objective and accurate evaluation of the operation state of the urban drainage network is realized.

Description

Technical Field

[0001] The invention relates to the technical field of municipal water supply and drainage, and in particular to a method for comprehensively evaluating the operating efficiency of a drainage network. Background Art

[0002] At present, there are common shortcomings in urban drainage networks, which seriously restrict the water delivery capacity and pollutant collection efficiency of the network, thus affecting the treatment efficiency of sewage treatment plants, the pollutant load reduction effect and the overall operating cost, and also has an adverse impact on the improvement of urban water environment quality. However, a unified and complete research framework has not yet been established at home and abroad for the drainage network efficiency evaluation index system formed by efficient collection and transfer of urban drainage and pollutants, and fully considering the influence of multi-source clean water mixing. In addition, when the existing evaluation methods are applied in practice, the gap between the score intervals is often small, which makes it difficult to effectively reflect the actual operating characteristics of the drainage network under the index system, and it is also impossible to accurately locate the shortcomings of the network. Summary of the invention

[0003] To this end, the present invention provides a method for comprehensively evaluating the operating efficiency of a drainage network, so as to achieve a comprehensive, objective and accurate evaluation of the operating status of a town drainage network.

[0004] In order to solve the above technical problems, the present invention provides a method for comprehensively evaluating the operation efficiency of a drainage network, comprising: Based on the construction and operation status of the urban drainage network to be evaluated, a drainage network operation efficiency evaluation index system is established; wherein the evaluation index system includes four criteria, namely structural attributes, service functions, operating conditions and operation and maintenance management, each of which includes several sub-criteria, and each of which includes several indicators; The analytic hierarchy process was used to determine the weight of each of the criteria mentioned; Taking the indicators of all the criteria as an indicator layer, using the hierarchical analysis method to determine the indicator weight of each indicator in the indicator layer; Multiplying the indicator weight of each indicator by the weight of the criterion to which the indicator belongs, to obtain a comprehensive weight of each indicator; According to the pre-established scoring criteria, each of the indicators is evaluated and scored to obtain an initial score for each of the indicators; Establishing a two-dimensional coordinate system with the comprehensive weight as the abscissa and the initial score as the ordinate, and dividing the two-dimensional coordinate system into a plurality of risk level range areas; According to the indicator falling into different risk level ranges, a piecewise function is constructed to calculate the final score of the indicator, wherein the final score is jointly determined by the initial score, the comprehensive weight and a preset adjustment coefficient, and the adjustment coefficient satisfies a predetermined constraint condition; The final scores of all indicators are added together to obtain a comprehensive score of the drainage network operation efficiency; Based on the comprehensive score, the operational efficiency status of the drainage network is determined.

[0005] In one embodiment of the present invention, the sub-criteria of the structural attributes include physical state, spatial attributes, and construction parameters; Among them, the physical status indicators include the proportion of overdue service pipelines, the comprehensive score of pipeline defects, and the configuration of pipeline water volume lifting facilities; The indicators of the spatial attributes include the proportion of blank areas in the sewage network; The indicators of the construction parameters include the matching of the interception multiple and the facility capacity.

[0006] In one embodiment of the present invention, the sub-criteria of the service function include pipe network collection and pollution control; Among them, the indicators collected by the pipe network include the centralized collection rate of urban domestic sewage, the organic matter concentration of the sewage treatment plant influent, and the external water ratio; The pollution control indicators include the pollution attenuation coefficient, the number of overflow points in the sewage network on dry days, and the overflow frequency of the combined sewer network.

[0007] In one embodiment of the present invention, the sub-criteria of the operating condition include water quantity condition, water quality condition, sedimentation condition, safety condition, and carbon emission condition; The water quantity working condition indicators include the fullness of the sewage pipe and the average flow rate of sewage in the pipe on dry days; The water quality condition indicators include characteristic indicators; The indicators of the deposition conditions include the proportion of silt in the pipe network section to the pipe diameter; The indicators of safety conditions include the concentration of toxic and harmful gases; The carbon emission indicators include methane gas concentration in septic tanks, greenhouse gas concentration in dry weather pipeline pumping stations, and annual change rate of pumping station operating energy consumption.

[0008] In one embodiment of the present invention, the sub-criteria of operation and maintenance management include system management, operation and maintenance status, intelligent management, and funding guarantee; Among them, the indicators of system management include drainage permit management system and operation and maintenance management system; The operation and maintenance indicators include daily maintenance of the pipeline network, operation and maintenance of supporting equipment and instruments of the pipeline network, emergency management, dredging records, and integrated operation and maintenance scheduling of plant-network-river / lake; The indicators of intelligent management include digital archiving of drainage network system, configuration of online monitoring instruments for drainage network, intelligent management platform for drainage network, and maintenance level of online data collection and management system; The funding guarantee indicators include including pipeline construction and operation and maintenance funds in the fiscal budget, and including digital platform construction and maintenance funds in the fiscal budget.

[0009] In one embodiment of the present invention, a two-dimensional coordinate system is established with the comprehensive weight as the horizontal coordinate and the initial score as the vertical coordinate, and the two-dimensional coordinate system is divided into several risk level range areas, including: According to the relative values ​​of the comprehensive weight and the initial score, the risk level range area is divided into a contribution area, a potential area, a risk area and a general area; Among them, when When , it is determined as the contribution area; When When the area is large, it is determined as a risk area; the rest of the area is a general area; is the comprehensive weight, with a value range of (0, 1). is the initial score of the indicator, ranging from (0, 100); in, is the comprehensive weight of the ith indicator in the indicator layer; It means the top 20% of the indicators in the indicator layer after the indicators are arranged in descending order according to their comprehensive weights; It indicates the last 40% of the indicators in the indicator layer after arranging them in descending order according to their comprehensive weights.

[0010] In one embodiment of the present invention, according to the indicators falling into different risk level ranges, a piecewise function is constructed to calculate the final score of the indicator, including: Construct the following piecewise function: , In the formula, hour, Contribution area; = hour, potential area; = hour, Risk areas; = hour, General area; Indicator layer i The final score of each indicator; Indicator layer i The comprehensive weight of the indicators; Indicator layer i The initial score of each indicator; The following constraints are met: , Where α, β and γ are adjustment coefficients.

[0011] In one embodiment of the present invention, determining the operating efficiency status of the drainage network according to the comprehensive score includes: The evaluation level of drainage network operation efficiency is determined as follows: , , Among them, when When the evaluation level is excellent; when When the evaluation level is good; when When , the evaluation level is poor; A comprehensive score for the operational performance of the drainage network; Indicator layer i The final score of the indicator, n is the number of indicators in the indicator layer.

[0012] The present invention also provides a drainage network operation efficiency comprehensive evaluation system, which is characterized by comprising: An evaluation index system establishment module is used to establish a drainage network operation efficiency evaluation index system based on the construction and operation status of the urban drainage network to be evaluated; wherein the evaluation index system includes four criteria, namely, structural attributes, service functions, operating conditions and operation and maintenance management, each of which includes a number of sub-criteria, and each of which includes a number of indicators; A criterion layer weight determination module is used to determine the weight of each criterion using a hierarchical analysis method; An indicator weight determination module, used to take the indicators of all the criteria as an indicator layer, and use a hierarchical analysis method to determine the indicator weight of each indicator in the indicator layer; A comprehensive weight determination module, used for multiplying the indicator weight of each indicator by the weight of the criterion to which the indicator belongs, to obtain a comprehensive weight of each indicator; An initial score calculation module is used to evaluate and score each of the indicators according to a pre-established scoring standard to obtain an initial score for each of the indicators; A risk level range area division module is used to establish a two-dimensional coordinate system with the comprehensive weight as the horizontal coordinate and the initial score as the vertical coordinate, and divide the two-dimensional coordinate system into a number of risk level range areas; A final score calculation module, used to construct a piecewise function to calculate the final score of the indicator according to the indicator falling into different risk level ranges, wherein the final score is jointly determined by the initial score, the comprehensive weight and a preset adjustment coefficient, and the adjustment coefficient satisfies a predetermined constraint condition; The comprehensive score calculation module is used to add up the final scores of all indicators to obtain a comprehensive score of the drainage network operation efficiency; The drainage network operation efficiency status determination module is used to determine the drainage network operation efficiency status according to the comprehensive score.

[0013] The above technical solution of the present invention has the following advantages compared with the prior art: The method for comprehensive evaluation of the operation efficiency of a drainage network described in the present invention is based on the actual operation problems of the current urban drainage network and the demand for sewage collection and treatment, and divides the evaluation object into four major criterion layers (structural attributes, service functions, operating conditions, and operation and maintenance management). On this basis, it further subdivides several sub-criteria layers and specific indicator layers, thereby forming a multi-level, all-round comprehensive evaluation indicator system.

[0014] The present invention uses the comprehensive weight as the horizontal coordinate and the initial score as the vertical coordinate to construct a two-dimensional coordinate system and divide the risk level range area. For indicators falling into different risk intervals, a piecewise function is used to correct the final score, which greatly improves the sensitivity and recognition of abnormal conditions of key indicators, and can achieve a comprehensive, objective and accurate evaluation of the operating status of urban drainage pipe networks. It can more scientifically guide the design and construction of urban drainage pipe networks, speed up the filling of shortcomings in sewage collection and treatment facilities, and greatly improve the operation and maintenance management level of drainage pipe networks. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0016] Figure 1 It is a flow chart of the comprehensive evaluation method of the drainage network operation efficiency of the present invention.

[0017] Figure 2 It is a schematic diagram of the schematic division of the criterion layer and the sub-criterion layer of the present invention. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0019] In the present invention, if directions (up, down, left, right, front and back) are described, it is only for the convenience of describing the technical solution of the present invention, and does not indicate or imply that the technical features referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation of the present invention.

[0020] In the present invention, "several" means one or more, "multiple" means more than two, "greater than", "less than", "exceed" and the like are understood to exclude the number itself; "above", "below", "within" and the like are understood to include the number itself. In the description of the present invention, if there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0021] Example 1 Reference Figure 1 As shown, a method for comprehensively evaluating the operation efficiency of a drainage network in this embodiment includes: Step S1: Based on the construction and operation status of the urban drainage network to be evaluated, a drainage network operation efficiency evaluation index system is established; wherein the evaluation index system includes four criteria, namely structural attributes, service functions, operating conditions and operation and maintenance management, each of which includes several sub-criteria, and each of which includes several indicators; Step S2, using the analytic hierarchy process to determine the weight of each criterion; Step S3, taking the indicators of all the criteria as an indicator layer, and using the hierarchical analysis method to determine the indicator weight of each indicator in the indicator layer; Step S4, multiplying the indicator weight of each indicator by the weight of the criterion to which the indicator belongs, to obtain a comprehensive weight of each indicator; Step S5: Evaluate and score each of the indicators according to a pre-established scoring standard to obtain an initial score for each indicator; Step S6, establishing a two-dimensional coordinate system with the comprehensive weight as the horizontal coordinate and the initial score as the vertical coordinate, and dividing the two-dimensional coordinate system into a plurality of risk level range areas; Step S7: construct a piecewise function to calculate the final score of the indicator according to the indicator falling into different risk level ranges, wherein the final score is determined by the initial score, the comprehensive weight and a preset adjustment coefficient, and the adjustment coefficient satisfies a predetermined constraint condition; Step S8: Add the final scores of all indicators to obtain a comprehensive score of the drainage network operation efficiency; Step S9: Determine the operating efficiency status of the drainage network according to the comprehensive score.

[0022] Specifically, refer to Figure 2 As shown, in step S1, based on the construction and operation status of China's urban drainage network, an indicator system is constructed with the goal of evaluating the operation efficiency of the drainage network, with structural attributes A1, service functions A2, operating conditions A3, and operation and maintenance management A4 as the first-level indicators (criterion layer). On the basis of the first-level indicators, it is expanded to include 14 second-level indicators (sub-criterion layer) and 32 third-level indicators (indicator layer).

[0023] The sub-criteria layer of the structural attribute A1 includes physical state B1, spatial attribute B2, and construction parameter B3; Among them, the indicators of the physical state B1 include the proportion of overdue service pipe networks C1, the comprehensive score of pipe network defects C2, and the configuration of pipe network water volume lifting facilities C3; The indicators of the spatial attribute B2 include the proportion of blank areas of the sewage network C4; The indicators of the construction parameter B3 include the matching of the interception multiple and the facility capacity C5.

[0024] Specifically, the sub-criteria of the service function A1 include pipe network collection B4 and pollution control B5; Among them, the indicators of the pipe network collection B4 include the centralized collection rate of urban domestic sewage C6, the organic matter concentration of the sewage treatment plant influent C7, and the external water ratio C8; The indicators of pollution control B5 include pollution attenuation coefficient C9, number of overflow points in sewage pipe network on dry days C10, and overflow frequency of combined sewer network C11.

[0025] Specifically, the sub-criteria of the operating condition A3 include water quantity condition B6, water quality condition B7, sedimentation condition B8, safety condition B9, and carbon emission condition B10; The indicators of the water volume condition B6 include the sewage pipe fullness C12 and the average flow rate of sewage in the pipe on dry days C13; The indicators of the water quality condition B7 include characteristic indicators C14; The indicators of the deposition condition B8 include the proportion of silt in the pipe network section to the pipe diameter C15; The indicators of the safety status B9 include the concentration of toxic and harmful gases C16; The indicators of the carbon emission situation B10 include the methane gas concentration in the septic tank C17, the greenhouse gas concentration in the pipeline pump station on dry days C18, and the annual change rate of the pump station operation energy consumption C19.

[0026] Specifically, the sub-criteria of the operation and maintenance management A4 include system management B11, operation and maintenance situation B12, intelligent management B13, and funding guarantee B14; Among them, the indicators of the system management B11 include drainage permit management system C20 and operation and maintenance management system C21; The indicators of the operation and maintenance situation B12 include daily maintenance of the pipeline network C22, operation and maintenance of supporting equipment and instruments of the pipeline network C23, emergency management C24, dredging records C25, and integrated operation and maintenance scheduling of plant-network-river / lake C26; The indicators of intelligent management B13 include digital archiving of drainage network system C27, configuration of online monitoring instruments for drainage network C28, intelligent management platform for drainage network C29, and maintenance level of online data collection and management system C30; The indicators of funding guarantee B14 include the inclusion of pipeline network construction and operation and maintenance funds into the fiscal budget C31, and the inclusion of digital platform construction and maintenance funds into the fiscal budget C32.

[0027] The specific qualitative / quantitative attributes and green attributes of the above-mentioned drainage network operation efficiency evaluation index system are shown in Table 1.

[0028] Table 1 Drainage network operation efficiency evaluation index system , Specifically, in step S5, the evaluation levels corresponding to the evaluation indicators of different criterion layers are compared. The evaluation indicators of the three criterion layers of structural attributes, service functions and operating conditions can be divided into four levels; the indicators corresponding to the operation and maintenance management criterion layer are qualitative indicators such as system and operation and maintenance, which are divided into two levels.

[0029] For example, the full score of each indicator is 100. The evaluation levels and scoring standards of the indicator layers under the four criterion layers are summarized in Table 2 below.

[0030] Table 2 Summary of evaluation levels and scoring standards corresponding to drainage network operation efficiency evaluation indicators , , , Specifically, in step S6, a two-dimensional coordinate system is established with the comprehensive weight as the horizontal coordinate and the initial score as the vertical coordinate, and the two-dimensional coordinate system is divided into several risk level range areas, including: According to the relative values ​​of the comprehensive weight and the initial score, the risk level range area is divided into a contribution area, a potential area, a risk area and a general area; Among them, when When , it is determined as the contribution area; When When the area is large, it is determined as a risk area; the rest of the area is a general area; is the comprehensive weight, with a value range of (0, 1). is the initial score of the indicator, ranging from (0, 100); in, is the comprehensive weight of the ith indicator in the indicator layer; It means the top 20% of the indicators in the indicator layer after the indicators are arranged in descending order according to their comprehensive weights; It indicates the last 40% of the indicators in the indicator layer after arranging them in descending order according to their comprehensive weights.

[0031] Specifically, in step S7, according to the indicator layer falling into different risk level ranges, a piecewise function is constructed to calculate the final score of the indicator layer, including: Construct the following piecewise function: , In the formula, hour, Contribution area; = hour, potential area; = hour, Risk areas; = hour, General area; Indicator layer i The final score of each indicator; Indicator layer i The comprehensive weight of the indicators; Indicator layer i The initial score of each indicator; The following constraints are met: , Where α, β and γ are adjustment coefficients.

[0032] Specifically, in step S9, the operation efficiency status of the drainage network is determined according to the comprehensive score, including: The evaluation level of drainage network operation efficiency is determined as follows: , , Among them, when When the evaluation level is excellent; when When the evaluation level is good; when When , the evaluation level is poor; A comprehensive score for the operational performance of the drainage network; is the final score of the i-th indicator layer, n is the number of indicator layers.

[0033] It should be noted that when using multiple weight determination methods to obtain different weight values, a multi-dimensional space definition coordinate system can be used for spatial modeling. Alternatively, the weight values ​​obtained by different methods can be adjusted first and then a weight-assignment two-dimensional space coordinate system can be established. This is a reasonable extension of this method and will not be elaborated here.

[0034] Example 2

[0035] Taking a certain area in a northern city as an example, the application of the drainage network operation efficiency evaluation method is carried out. The comprehensive weights and rankings of the performance evaluation indicators of the drainage network in this area in terms of structural attributes, service functions, operating conditions and actual operation and maintenance management are shown in Table 3, and the scores of the evaluation standards are shown in Table 4. The final score of the drainage network operation efficiency evaluation in this area is 82.5 points. The specific calculation process is introduced below.

[0036] 1. Index system assignment The correlation analysis between the same criterion layers comprehensively evaluates the operation efficiency of the drainage network, and analyzes the correlation between the drainage network structure attributes, service functions, operating conditions, operation and maintenance management and the network operation efficiency. Among them, the service function has the strongest correlation with the operation efficiency of the drainage network, followed by the operating conditions and operation and maintenance management. The weight coefficients of the four criterion layers were calculated using the normalization method, and the weight coefficients of the structural attribute A1, service function A2, operating condition A3, and operation and maintenance management A4 were 0.1875, 0.3125, 0.25, and 0.25, respectively.

[0037] 2. Analyze the correlation of indicators and construct a judgment matrix For the evaluation criteria A under the evaluation target, the evaluation index set is C={c1, c2,…, cn}, and the judgment matrix P(AC) is constructed. In the formula, cij represents the relative importance of factor ci to cj (i=1, 2,…, n; j=1, 2,…, n), and the value of bij is usually scaled from 1 to 9.

[0038] 3. Determination of the comprehensive weight of each indicator Multiply the weight of each indicator by the weight of the criterion layer to which the indicator belongs to obtain the comprehensive weight of the evaluation indicator, see Table 3.

[0039] Table 3 Comprehensive weights and rankings of drainage network performance evaluation indicators , .

[0040] IV. Evaluation and scoring of indicator system According to the impact of different indicator values, degree of perfection of measures on the operation efficiency of drainage pipe network, and in combination with relevant standards and specifications, test simulation, engineering and literature research, different indicator evaluation levels and corresponding scoring standards are divided to make an overall evaluation of the operation efficiency of urban drainage pipe network and give the evaluation results, see Table 4.

[0041] Table 4 Application and score calculation table of comprehensive evaluation method for operation efficiency of drainage network in a district of Tianjin , .

[0042] According to the drainage network indicator weights and evaluation index scores within the area, α=0.2, β=0.1 and γ=0.3 were set, and the final score of the comprehensive operation efficiency evaluation of the drainage network within the area was calculated to be 82.5 points.

[0043] In addition, in the process of assigning values ​​to individual indicators using the analytic hierarchy process in this embodiment, since it is only for demonstrating the calculation ideas and does not involve the weight division of the sub-criteria layer, it does not mean that the weight calculation of the sub-criteria layer cannot and does not need to be performed.

[0044] Example 3 Based on the same inventive concept, this embodiment provides a drainage network operation efficiency comprehensive evaluation system, and its principle of solving the problem is similar to the drainage network operation efficiency comprehensive evaluation method, and the repeated parts are not repeated here.

[0045] This embodiment provides a drainage network operation efficiency comprehensive evaluation system, including: An evaluation index system establishment module is used to establish a drainage network operation efficiency evaluation index system based on the construction and operation status of the urban drainage network to be evaluated; wherein the evaluation index system includes four criteria, namely, structural attributes, service functions, operating conditions and operation and maintenance management, each of which includes a number of sub-criteria, and each of which includes a number of indicators; A criterion layer weight determination module is used to determine the weight of each criterion using a hierarchical analysis method; An indicator weight determination module, used to take the indicators of all the criteria as an indicator layer, and use a hierarchical analysis method to determine the indicator weight of each indicator in the indicator layer; A comprehensive weight determination module, used for multiplying the indicator weight of each indicator by the weight of the criterion to which the indicator belongs, to obtain a comprehensive weight of each indicator; An initial score calculation module is used to evaluate and score each of the indicators according to a pre-established scoring standard to obtain an initial score for each of the indicators; A risk level range area division module is used to establish a two-dimensional coordinate system with the comprehensive weight as the horizontal coordinate and the initial score as the vertical coordinate, and divide the two-dimensional coordinate system into a number of risk level range areas; A final score calculation module, used to construct a piecewise function to calculate the final score of the indicator according to the indicator falling into different risk level ranges, wherein the final score is jointly determined by the initial score, the comprehensive weight and a preset adjustment coefficient, and the adjustment coefficient satisfies a predetermined constraint condition; The comprehensive score calculation module is used to add up the final scores of all indicators to obtain a comprehensive score of the drainage network operation efficiency; The drainage network operation efficiency status determination module is used to determine the drainage network operation efficiency status according to the comprehensive score.

[0046] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0047] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0048] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0049] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0050] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A comprehensive evaluation method for the operation efficiency of a drainage network, characterized in that: include: Based on the construction and operation status of the urban drainage network to be evaluated, a drainage network operation efficiency evaluation index system is established; wherein the evaluation index system includes four criteria, namely structural attributes, service functions, operating conditions and operation and maintenance management, each of which includes several sub-criteria, and each of which includes several indicators; The analytic hierarchy process was used to determine the weight of each of the criteria mentioned; Taking the indicators of all the criteria as an indicator layer, using the hierarchical analysis method to determine the indicator weight of each indicator in the indicator layer; Multiplying the indicator weight of each indicator by the weight of the criterion to which the indicator belongs, to obtain a comprehensive weight of each indicator; According to the pre-established scoring criteria, each of the indicators is evaluated and scored to obtain an initial score for each of the indicators; Establishing a two-dimensional coordinate system with the comprehensive weight as the abscissa and the initial score as the ordinate, and dividing the two-dimensional coordinate system into a plurality of risk level range areas; According to the indicator falling into different risk level ranges, a piecewise function is constructed to calculate the final score of the indicator, wherein the final score is jointly determined by the initial score, the comprehensive weight and a preset adjustment coefficient, and the adjustment coefficient satisfies a predetermined constraint condition; The final scores of all indicators are added together to obtain a comprehensive score of the drainage network operation efficiency; Based on the comprehensive score, the operational efficiency status of the drainage network is determined.

2. A method for comprehensive evaluation of drainage network operation efficiency according to claim 1, characterized in that: The sub-criteria of the structural properties include physical state, spatial properties, and construction parameters; Among them, the physical status indicators include the proportion of overdue service pipelines, the comprehensive score of pipeline defects, and the configuration of pipeline water volume lifting facilities; The indicators of the spatial attributes include the proportion of blank areas in the sewage network; The indicators of the construction parameters include the matching of the interception multiple and the facility capacity.

3. A method for comprehensive evaluation of drainage network operation efficiency according to claim 1, characterized in that: The sub-criteria of the service functions include pipe network collection, pollution control; Among them, the indicators collected by the pipe network include the centralized collection rate of urban domestic sewage, the organic matter concentration of the sewage treatment plant influent, and the external water ratio; The pollution control indicators include the pollution attenuation coefficient, the number of overflow points in the sewage network on dry days, and the overflow frequency of the combined sewer network.

4. A method for comprehensive evaluation of drainage network operation efficiency according to claim 1, characterized in that: The sub-criteria of the operating conditions include water quantity conditions, water quality conditions, sedimentation conditions, safety conditions, and carbon emissions conditions; The water quantity working condition indicators include the fullness of the sewage pipe and the average flow rate of sewage in the pipe on dry days; The water quality condition indicators include characteristic indicators; The indicators of the deposition conditions include the proportion of silt in the pipe network section to the pipe diameter; The indicators of safety conditions include the concentration of toxic and harmful gases; The carbon emission indicators include methane gas concentration in septic tanks, greenhouse gas concentration in dry weather pipeline pumping stations, and annual change rate of pumping station operating energy consumption.

5. A method for comprehensive evaluation of drainage network operation efficiency according to claim 1, characterized in that: The sub-criteria of operation and maintenance management include system management, operation and maintenance status, intelligent management, and funding guarantee; Among them, the indicators of system management include drainage permit management system and operation and maintenance management system; The operation and maintenance indicators include daily maintenance of the pipeline network, operation and maintenance of supporting equipment and instruments of the pipeline network, emergency management, dredging records, and integrated operation and maintenance scheduling of plant-network-river / lake; The indicators of intelligent management include digital archiving of drainage network system, configuration of online monitoring instruments for drainage network, intelligent management platform for drainage network, and maintenance level of online data collection and management system; The funding guarantee indicators include including pipeline construction and operation and maintenance funds in the fiscal budget, and including digital platform construction and maintenance funds in the fiscal budget.

6. A method for comprehensive evaluation of drainage network operation efficiency according to claim 1, characterized in that: A two-dimensional coordinate system is established with the comprehensive weight as the horizontal coordinate and the initial score as the vertical coordinate, and the two-dimensional coordinate system is divided into several risk level range areas, including: According to the relative values ​​of the comprehensive weight and the initial score, the risk level range area is divided into a contribution area, a potential area, a risk area and a general area; Among them, when When , it is determined as the contribution area; When When the area is large, it is determined as a risk area; the rest of the area is a general area; is the comprehensive weight, with a value range of (0, 1). is the initial score of the indicator, ranging from (0, 100); in, is the comprehensive weight of the ith indicator in the indicator layer; It means the top 20% of the indicators in the indicator layer after the indicators are arranged in descending order according to their comprehensive weights; It indicates the last 40% of the indicators in the indicator layer after arranging them in descending order according to their comprehensive weights.

7. A method for comprehensive evaluation of drainage network operation efficiency according to claim 1, characterized in that: According to the indicators falling into different risk level ranges, a piecewise function is constructed to calculate the final score of the indicator, including: Construct the following piecewise function: ， In the formula, hour, Contribution area; = hour, potential area; = hour, Risk areas; = hour, General area; In the indicator layer i The final score of each indicator; Indicator layer i The comprehensive weight of the indicators; Indicator layer i The initial score of each indicator; The following constraints are met: ， Where α, β and γ are adjustment coefficients.

8. A method for comprehensive evaluation of drainage network operation efficiency according to claim 1, characterized in that: Based on the comprehensive score, the operational performance status of the drainage network is determined, including: The evaluation level of drainage network operation efficiency is determined as follows: ， ， Among them, when When the evaluation level is excellent; when When the evaluation level is good; when When , the evaluation level is poor; A comprehensive score for the operational performance of the drainage network; Indicator layer i The final score of the indicator, n is the number of indicators in the indicator layer.

9. A comprehensive evaluation system for the operation efficiency of a drainage network, characterized in that: include: An evaluation index system establishment module is used to establish a drainage network operation efficiency evaluation index system based on the construction and operation status of the urban drainage network to be evaluated; wherein the evaluation index system includes four criteria, namely, structural attributes, service functions, operating conditions and operation and maintenance management, each of which includes a number of sub-criteria, and each of which includes a number of indicators; A criterion layer weight determination module is used to determine the weight of each criterion using a hierarchical analysis method; An indicator weight determination module, used to take the indicators of all the criteria as an indicator layer, and use a hierarchical analysis method to determine the indicator weight of each indicator in the indicator layer; A comprehensive weight determination module, used for multiplying the indicator weight of each indicator by the weight of the criterion to which the indicator belongs, to obtain a comprehensive weight of each indicator; An initial score calculation module is used to evaluate and score each of the indicators according to a pre-established scoring standard to obtain an initial score for each of the indicators; A risk level range area division module is used to establish a two-dimensional coordinate system with the comprehensive weight as the horizontal coordinate and the initial score as the vertical coordinate, and divide the two-dimensional coordinate system into a number of risk level range areas; A final score calculation module, used to construct a piecewise function to calculate the final score of the indicator according to the indicator falling into different risk level ranges, wherein the final score is jointly determined by the initial score, the comprehensive weight and a preset adjustment coefficient, and the adjustment coefficient satisfies a predetermined constraint condition; The comprehensive score calculation module is used to add up the final scores of all indicators to obtain a comprehensive score of the drainage network operation efficiency; The drainage network operation efficiency status determination module is used to determine the drainage network operation efficiency status according to the comprehensive score.

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