Method for predicting net water consumption of urban water supply

Abstract

The invention provides a method for predicting the net water consumption of urban water supply. The method comprises the steps that independent metering areas are divided according to water supply pipe network data and drainage pipe network data; wherein the independent metering area is an area in which water supply and water drainage can be metered in a closed manner; calculating water supply and drainage data based on the boundary flowmeter data of the independent metering area and the user data; wherein the water supply and drainage data at least comprise one of the total water supply amount, the total pollution discharge monitoring amount, the real leakage amount, the external water invasion amount and the sewage collection rate; and determining the net water consumption of urban water supply according to the water supply and drainage data. According to the invention, independent metering areas in which water supply data and drainage data can be directly metered are established through the topological data of the water supply and drainage pipe network, and a quantitative evaluation method for the net water consumption in each urban water supply area is provided.

Description

Technical Field

[0001] The present invention relates to the technical field of water treatment, and more specifically to a method for predicting net water consumption of urban water supply. Background Art

[0002] The net water consumption of urban water supply refers to the net amount of water that cannot be recycled during the use of water resources, also known as water consumption. It is an important indicator to measure the real consumption of water resources, and it reflects the efficiency and sustainability of water resource utilization. In the urban water supply system, the calculation of water consumption includes consumption of domestic water, industrial water, agricultural irrigation, etc.

[0003] Most cities in my country are short of water to varying degrees, and water conservation is one of the important contents of the five water governance in cities. The high net water consumption of urban water supply not only causes serious waste of water resources, but also causes harm such as water quality degradation, increased economic costs and environmental impact. Although new technologies, new equipment and new regulations have been introduced in many aspects such as agricultural water conservation, industrial water conservation, and urban and rural water conservation, there are no specific measures and methods to reasonably evaluate the net water consumption in various areas of the city. Summary of the invention

[0004] In view of the above problems, the present invention provides a method for predicting the net water consumption of urban water supply for predicting the net water consumption of the city.

[0005] The present invention provides a method for predicting the net water consumption of urban water supply, comprising: dividing independent metering areas according to water supply network data and drainage network data; wherein the independent metering areas are areas where both water supply and drainage can be closed and metered; calculating water supply and drainage data based on boundary flow meter data and user data in the independent metering areas; wherein the water supply and drainage data include at least one of the total water supply, the total amount of sewage monitoring, the actual leakage, the external water intrusion and the sewage collection rate; and determining the net water consumption of urban water supply according to the water supply and drainage data.

[0006] According to an embodiment of the present invention, the water supply and drainage data are calculated, including: using the boundary flow meter data of the independent metering area to determine the total water supply, the total sewage monitoring amount, the actual leakage amount and the external water intrusion amount; using the user data of the independent metering area to determine the sewage collection rate.

[0007] According to an embodiment of the present invention, the net water consumption of urban water supply is determined based on the water supply and drainage data, including: using the mass conservation principle to obtain a water balance calculation formula; using the water balance calculation formula and the water supply and drainage data to determine the net water consumption of urban water supply; wherein the water balance calculation formula is as follows:

[0008] The water balance calculation formula is as follows: It indicates the total amount of sewage monitoring that can be collected from drainage households corresponding to water supply households in the independent metering area; Represents the total water supply to water users within the independent metering area; It indicates the total net water consumption in the independent metering area, including industry, agriculture and residents' life; Indicates the actual leakage amount caused by visible leakage, hidden leakage, background leakage, pool or tank leakage and overflow in the water supply network within the independent metering area; represents the sewage collection rate; Indicates the amount of external water intruding into the sewage network in the area.

[0009] According to an embodiment of the present invention, the total water supply, the total sewage monitoring amount, the actual leakage amount and the external water intrusion amount are determined by using the boundary flow meter data of the inflow and outflow of the independent metering area, including: using the boundary flow meter data of the inflow and outflow of the independent metering area to determine the total water supply; the total water supply is the data difference between the inflow boundary flow meter and the outflow boundary flow meter; using the total amount of the boundary flow meter data of the downstream sewage trunk flow of the independent metering area to determine the total sewage monitoring amount; using the boundary flow meter data of the independent metering area at night to determine the actual leakage amount; using the design flow and boundary flow meter data of the independent metering area to determine the external water intrusion amount.

[0010] According to an embodiment of the present invention, the sewage collection rate is determined using user data in an independent metering area, including: confirming the number of water users in the independent metering area and the number of drainage users in the independent metering area, and expressing the sewage collection rate by the ratio of the number of sewage dischargers in the area to the total number of water users in the area.

[0011] According to an embodiment of the present invention, the actual leakage amount is determined using the boundary flow meter data of the independent metering area at night, including: using the boundary flow meter to determine the minimum flow of the area at night; determining the maximum legal water consumption at night through the legal water consumption of residents at night and the number of water users; the maximum legal water consumption at night is the product of the legal water consumption of residents at night and the number of water users; using the minimum flow of the area at night and the maximum legal water consumption at night to calculate the actual leakage amount; the actual leakage amount is the difference between the minimum flow of the area at night and the maximum legal water consumption at night.

[0012] According to an embodiment of the present invention, the design flow and boundary flow meter data of the independent metering area are used to determine the amount of external water intrusion, including: determining the amount of external water infiltration of groundwater based on the design flow and the maximum instantaneous flow of sewage in the area according to the boundary flow meter data; determining the amount of external water infiltration of surface water based on the rainy day flow and dry day flow of the main pipe node boundary flow meter data downstream of the sewage partition; adding the amount of external water infiltration of groundwater and the amount of external water infiltration of surface water to obtain the total amount of external water intrusion.

[0013] The second aspect of the present invention provides a device for predicting the net water consumption of urban water supply, which can be used to implement the above method, and the device includes: a regional division module, which is used to divide independent metering areas according to water supply network data and drainage network data; wherein the independent metering area is an area where both water supply and drainage can be closed and metered; a preliminary calculation module, which is used to calculate the water supply and drainage data based on the boundary flow meter data and user data of the independent metering area; wherein the water supply and drainage data include at least one of the total water supply, the total amount of sewage monitoring, the actual leakage, the external water intrusion and the sewage collection rate; a net water consumption module, which is used to determine the net water consumption of urban water supply based on the water supply and drainage data.

[0014] The third aspect of the present invention provides an electronic device, comprising: one or more processors; a memory for storing one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors execute the above-mentioned method for predicting the net water consumption of urban water supply.

[0015] The fourth aspect of the present invention also provides a computer-readable storage medium having executable instructions stored thereon, which, when executed by a processor, causes the processor to execute the above-mentioned method for predicting the net water consumption of urban water supply.

[0016] According to the method for predicting the net water consumption of urban water supply provided by the present invention, by establishing an independent metering area where both water supply and drainage can be closed and metered, it is possible to directly calculate the required water supply and drainage data through the boundary flow meter data. Since a quantitative evaluation method for the net water consumption in each area of ​​urban water supply using water supply and drainage data is proposed based on the conservation of mass, the technical problem of no specific measures for reasonably evaluating the net water consumption in each area of ​​the city is at least partially solved, and the technical effect of evaluating the degree of water resource waste in each area is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A flowchart schematically shows a method for predicting net water consumption of urban water supply according to an embodiment of the present invention; Figure 2 A schematic diagram showing water meter box data of a water supply network divided into households according to an embodiment of the present invention is shown schematically; Figure 3 A schematic diagram schematically shows riser data of a drainage network divided into zones and distributed to households according to an embodiment of the present invention; Figure 4 Schematically shows a detailed flow chart of the evaluation of the net water consumption of urban water supply according to an embodiment of the present invention; Figure 5 A schematic diagram shows a structural block diagram of a device for predicting net water consumption of urban water supply according to an embodiment of the present invention; Figure 6A block diagram of an electronic device suitable for implementing a method for predicting net water consumption of urban water supply according to an embodiment of the present invention is schematically shown. DETAILED DESCRIPTION

[0018] Below, embodiments of the present invention will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present invention. In the following detailed description, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of embodiments of the present invention. However, it is apparent that one or more embodiments may also be implemented without these specific details. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of concepts of the present invention.

[0019] The terms used herein are only for describing specific embodiments and are not intended to limit the present invention. The terms "comprise", "include", etc. used herein indicate the existence of the features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0020] All terms (including technical and scientific terms) used herein have the meanings commonly understood by those skilled in the art unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0021] When using expressions such as "at least one of A, B, and C, etc.", they should generally be interpreted according to the meaning of the expression commonly understood by those skilled in the art (for example, "a system having at least one of A, B, and C" should include but is not limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.).

[0022] First, the technical terms involved in the present invention are explained as follows: Some division principles of traditional independent metering areas (DMA partitions): Traditional DMA partitions are water supply partitions, and this time the definition is water supply and drainage partitions. Traditional DMA partitions are generally planned into three-level DMA partitions. The principle of the first-level DMA partition division mainly considers the business scope and management area of ​​the water company; the division principles of the second-level DMA partitions are convenient geographical conditions, adaptability to the water supply network structure, pump station service scope, consistent regional water use types, easy installation of flow meters and the minimum number, and boundary valves that can be permanently closed; the division principle of the third-level DMA partition is that it must be a closed metering area, and it can be divided according to a certain number of users or pipe network length in the area. The newly added water supply and drainage zoning principle of the present invention takes the third-level DMA partition as the main analysis object, and the higher-level DMA area can be calculated through the secondary DMA area within it, so it is not the focus of this time. The following new DMA areas all represent the final (third-level) DMA areas.

[0023] Figure 1 The flowchart of the method for predicting the net water consumption of urban water supply according to an embodiment of the present invention is schematically shown. Figure 1 As shown, an embodiment of the present invention provides a method for predicting the net water consumption of urban water supply, including: dividing independent metering areas according to water supply network data and drainage network data; wherein the independent metering areas are areas where both water supply and drainage can be closed and metered; based on the boundary flow meter data and user data of the independent metering areas, calculating the water supply and drainage data; wherein the water supply and drainage data include at least one of the total water supply, the total amount of sewage monitoring, the actual leakage, the external water intrusion and the sewage collection rate; and determining the net water consumption of urban water supply according to the water supply and drainage data.

[0024] In this embodiment, Figure 2 The schematic diagram of the water meter box data of the water supply network divided into households according to an embodiment of the present invention is schematically shown, which includes the whole process structure of water supply, water distribution and water use. For example, 300-cast iron, 52-17.109, 63, PE, 300 is the diameter of the pipe, cast iron is the material of the pipe, 52-17 is the number of the pipe, 63 is also the diameter, and PE is the material; blue and purple represent the water supply network data of the two censuses respectively. Through the census and mapping, the topological result data of the water supply network can be collected to provide basic data support for the division of zoning. Figure 3 A schematic diagram of riser data of a drainage network divided into zones and distributed to households according to an embodiment of the present invention is schematically shown, reflecting the topological structure of the drainage network and providing data support for dividing the zones.

[0025] In this embodiment, the following is generated by surveying and mapping or collecting and aggregating old data: Figure 2 , Figure 3The complete water supply network and drainage network data, including the complete topological data and basic information from the user to the plant, adopts a unified GIS platform to manage the water supply and drainage network in a unified manner, and can clearly view the source of water supply and the destination of sewage discharge for the same water users and drainage users. At the same time, the number of permanent residents in each area is investigated to provide data support for the water balance analysis of water supply and drainage.

[0026] In this embodiment, based on the water supply network and the drainage network, the division principle of the traditional water supply network DMA zoning is considered and extended to the new DMA area division of the water supply and drainage network. The drainage households and drainage network data in the area are also taken into account when dividing the new DMA area. The different zoning principles include the following: (1) The drainage network in the new DMA area needs to completely separate rainwater and sewage, and there is no direct discharge in the sewage network. The sewage volume can be obtained by reasonably dividing the regional boundaries and conducting centralized monitoring on the downstream trunk pipes. For pipe networks that do not have complete rainwater and sewage separation, it is necessary to permanently close the mixing points or install flow meters to identify and measure the additional flow of sewage outflow or rainwater into the sewage pipe network; (2) When demarcating new DMA areas, it is necessary to fully consider that water users and drainage users in the area are the same subject, that is, the water supply network in the area supplies water to water users in the area, and the sewage discharged by water users (drainage users) in the area after using water is the drainage network in the area, and the number of water users and drainage users should be counted; (3) The demarcated new DMA areas need to reasonably install flow meters, including all water supply and sewage flows in and out of the area, with the principle of a small number of equipment and the ability to calculate the total water supply and total sewage discharge in the area.

[0027] Through the embodiment of the present invention, a net water consumption prediction method based on water supply network data and drainage network data is proposed, wherein the water supply and drainage areas are divided into independent areas that can be closed and metered, which provides a basis for subsequent data collection and calculation; the data types that need to be calculated are clarified, including total water supply, total sewage monitoring volume, actual leakage volume, external water intrusion volume and sewage collection rate, etc., which are the key to predicting net water consumption; based on the calculated water supply and drainage data, the net water consumption of urban water supply is finally determined. The net water consumption of each metering zone in the city can be quantitatively evaluated and analyzed, and the net water consumption of each area can be ranked high and low. According to the net water consumption of different cities and the subsequent reduction targets, effective supervision, management, evaluation and guidance can be carried out.

[0028] Based on the above embodiment, the water supply and drainage data are calculated, including: using the boundary flow meter data of the independent metering area to determine the total water supply, the total sewage monitoring amount, the actual leakage amount and the external water intrusion amount; using the user data of the independent metering area to determine the sewage collection rate.

[0029] like Figure 4As shown, the calculation of water supply and drainage data includes at least: the total water supply in the area based on the new water supply and drainage DMA partition Monitoring and evaluation; within the new water supply and drainage DMA area, the total amount of sewage discharge from the downstream sewage main pipe of the drainage area corresponding to the water supply area Evaluation; The actual leakage of the water supply network based on the minimum nighttime flow of the water supply zone in the new water supply and drainage DMA area Monitoring and evaluation of the new water supply and drainage DMA area, the amount of external water intrusion that may exist in the sewage pipe network Assessment; Determine the sewage collection rate of the drainage network within the new water supply and drainage DMA area ; Based on the new water supply and drainage DMA area water supply and drainage balance analysis method, calculate the net water consumption in the area , and built-in development program to form an automated analysis and calculation system.

[0030] Through the embodiments of the present invention, a method for calculating water supply and drainage data is concretized, that is, boundary flow meter data and user data are used to determine water supply and drainage data, thereby providing a data basis for subsequent prediction of net water consumption.

[0031] On the basis of the above embodiment, the net water consumption of urban water supply is determined according to the water supply and drainage data, including: using the principle of mass conservation to obtain a water balance calculation formula; using the water balance calculation formula and the water supply and drainage data to determine the net water consumption of urban water supply; wherein the water balance calculation formula is as follows:

[0032] The water balance calculation formula is as follows: It indicates the total amount of sewage monitoring that can be collected from drainage households corresponding to water supply households in the independent metering area; Represents the total water supply to water users within the independent metering area; It indicates the total net water consumption in the independent metering area, including industry, agriculture and residents' life; Indicates the actual leakage amount caused by visible leakage, hidden leakage, background leakage, pool or tank leakage and overflow in the water supply network within the independent metering area; It represents the sewage collection rate, which here represents the ratio of the number of sewage dischargers to the number of water users in the new independent metering area; Indicates the amount of external water intruding into the sewage network in the area.

[0033] Furthermore, the calculation formula for the net water consumption in this area can be obtained as follows:

[0034] Through the embodiment of the present invention, according to the divided new water supply and drainage DMA area, the mass conservation principle is used to balance the water volume in the independent metering area, and the water balance calculation formula is obtained, that is, in the new water supply and drainage DMA partition, the product of the theoretical sewage discharge and the sewage collection rate plus the possible external water intrusion is equal to the total sewage discharge monitored by the downstream trunk pipe of the sewage discharge partition. Through the above water balance calculation formula, the net water consumption in each area can be evaluated, and the loss coefficient weight can be assigned according to the population of each partition and the population of the total area, the water consumption level in different areas can be evaluated and ranked, and water-saving publicity and mandatory rectification can be carried out for areas with serious water consumption, so as to promote the construction of a water-saving society. At the same time, since all data are directly obtained from the flow meter or system, the above algorithm and processing process can be developed into a program to form an information system that can automatically analyze and evaluate regional water consumption.

[0035] On the basis of the above embodiments, the total water supply, the total sewage monitoring amount, the actual leakage amount and the external water intrusion amount are determined by using the boundary flow meter data of the inflow and outflow of the independent metering area, including: using the boundary flow meter data of the inflow and outflow of the independent metering area to determine the total water supply; the total water supply is the data difference between the inflow boundary flow meter and the outflow boundary flow meter; using the total amount of the boundary flow meter data of the downstream sewage trunk flow of the independent metering area to determine the total sewage monitoring amount; using the boundary flow meter data of the independent metering area at night to determine the actual leakage amount; using the design flow and boundary flow meter data of the independent metering area to determine the external water intrusion amount.

[0036] In this embodiment, the water inflow and outflow of the water supply network data of the new water supply and drainage DMA area are monitored, and the total water supply is obtained by monitoring and calculating the boundary flow meters of the inflow and outflow areas, that is, the sum of the flow meters of all inflow areas minus the sum of the outflow flow meters. The total amount includes the total water consumption and the actual leakage in the area, and the total water consumption includes the total sewage discharge and the net water consumption.

[0037] In this embodiment, through field investigation, the number of permanent water users within the service area of ​​the water supply network DMA zone and the distribution of sewage network corresponding to the daily sewage discharge of this part of the permanent population are collected and analyzed. By monitoring the flow of downstream sewage trunk pipes in the area that can reflect the actual sewage discharge of this part of the permanent population, the total sewage monitoring volume in the new water supply and drainage DMA zone is obtained. , the monitoring data is the sum of the total sewage discharge in the area and the possible intrusion of water from outside the sewage pipe network. If there are multiple boundary flow meters, the total sewage monitoring volume is obtained by summing them up. It should be noted that there may be a phenomenon that some of the water is discharged to the rainwater pipe network and some is directly discharged to other areas, so the number of water users and sewage dischargers in the area may not be the same.

[0038] Through the embodiments of the present invention, it is explained in detail how to use the boundary flow meter data to determine various water supply and drainage data, including how to determine the total water supply (through the boundary flow meter data difference), the total sewage monitoring amount (through the downstream sewage main flow data), the actual leakage amount (through the night boundary flow meter data) and the external water intrusion amount (through the design flow and the boundary flow meter data).

[0039] On the basis of the above embodiment, the sewage collection rate is determined using user data in the independent metering area, including: confirming the number of water users in the independent metering area and the number of drainage users in the independent metering area, and expressing the sewage collection rate as the ratio of the number of sewage dischargers in the area to the total number of water users in the area.

[0040] In this embodiment, the sewage collection rate of the drainage network is an important indicator to measure the efficiency and effectiveness of the urban sewage treatment system. By registering, diverting, and connecting all drainage households in the area to the municipal sewage network, the sewage discharge destination of urban drainage households can be clearly viewed. By investigating and counting the number of water users and drainage households in the area, the sewage collection rate of the drainage network in the area is analyzed. It is expressed as the ratio of the number of people discharging sewage in the area to the total number of people using water in the area.

[0041] Through the embodiments of the present invention, there may be a phenomenon that part of the water is discharged to the rainwater pipe network and part of the water is directly discharged to other areas, so the number of water users and the number of sewage dischargers in the area are not necessarily the same. Therefore, it is necessary to determine the sewage collection rate by comparing the number of water users and the number of sewage dischargers to provide a basis for evaluating the sewage collection efficiency.

[0042] On the basis of the above-mentioned embodiment, the actual leakage amount is determined by using the boundary flow meter data of the independent metering area at night, including: using the boundary flow meter to determine the minimum flow of the area at night; determining the maximum legal water consumption at night through the legal water consumption of residents at night and the number of water users; the maximum legal water consumption at night is the product of the legal water consumption of residents at night and the number of water users; using the minimum flow of the area at night and the maximum legal water consumption at night to calculate the actual leakage amount; the actual leakage amount is the difference between the minimum flow of the area at night and the maximum legal water consumption at night.

[0043] In this embodiment, the actual leakage is obtained mainly based on the new type of water supply and drainage DMA partitions divided by the net night minimum flow rate. The calculation formula is as follows: = Regional minimum night flow (MNF) - maximum legal water consumption at night = Net minimum night flow (NNF) Among them, the regional minimum night flow (MNF) is calculated by the boundary flow meter of the DMA partition of the water supply network, and is expressed by the average flow in the period from 2 am to 4 am. It is the data closest to the actual leakage amount; the maximum legal water consumption at night is calculated by the empirical method, which is estimated by the legal water consumption of residents at night and the number of water users.

[0044] Through the embodiments of the present invention, the actual leakage of the water supply network It is the amount of water lost due to overt leakage, concealed leakage, background leakage, seepage and overflow of water pools or water tanks in the water supply network. The relevant water really exists and returns to nature without being utilized. This amount of water is the amount of water that the water company or water supply enterprise needs to focus on reducing. It is an important component that affects production and sales volume, but is not part of the net water consumption. The actual leakage amount is calculated by determining the minimum flow rate at night and the maximum legal water consumption at night, which improves the accuracy of the leakage calculation.

[0045] On the basis of the above embodiment, the design flow and boundary flow meter data of the independent metering area are used to determine the amount of external water intrusion, including: determining the amount of external water infiltration into groundwater based on the design flow and the maximum instantaneous flow of sewage in the area according to the boundary flow meter data; determining the amount of external water infiltration into surface water based on the rainy day flow and dry day flow of the main pipe node boundary flow meter data downstream of the sewage partition; adding the amount of external water infiltration into groundwater and the amount of external water infiltration into surface water to obtain the total amount of external water intrusion.

[0046] In this embodiment, for the final drainage DMA zoning, the drainage pipe network in the area needs to complete the rainwater and sewage diversion transformation, and there is no rainwater and sewage mixing, sewage direct discharge and other phenomena. If there are such phenomena, flow meters need to be installed or complete diversion transformation is required. The external water intrusion that may exist in the sewage pipe network in the area includes the groundwater infiltration in dry days and the surface water inflow in rainy days.

[0047] Specifically, it includes: first, the assessment of the amount of external water intrusion into groundwater: the design flow of regional dry flow sewage and the maximum instantaneous flow of monitored sewage in the area are compared and analyzed. The specific method is: the design flow of dry flow sewage is the maximum theoretical flow obtained by regularly investigating the current permanent population and industrial production in the area according to the outdoor drainage design specifications, including the maximum domestic sewage design flow (domestic sewage in residential areas, domestic sewage in public buildings, domestic sewage and shower sewage in industrial enterprises) and industrial wastewater design flow obtained according to regional status data. By comparing and analyzing the maximum theoretical flow of sewage discharge and the maximum value monitored at the downstream trunk pipe node of the sewage area, it is analyzed whether there is external water intrusion. If it exists, it is approximately considered that the amount of external water intrusion into groundwater is a constant value and remains unchanged, and the amount of external water intrusion is evaluated and calculated. Second, the assessment of the amount of external water intrusion into surface water: mainly the inflow that may exist on rainy days, which is obtained by monitoring and comparing the rainy day flow and dry day flow of the trunk pipe node downstream of the sewage partition. Because the discharge of sewage on rainy days and dry days is relatively stable, the amount of surface water intrusion can be effectively identified and assessed. Water intrusion volume inside and outside the new water supply and drainage DMA partition The assessment is represented by the sum of the above-mentioned groundwater infiltration, surface water inflow, and the inflow and outflow of the mixed rainwater and sewage. If it is 0, it means that there is no external water intrusion in the sewage pipe network. It should be noted that for areas with complete rainwater and sewage separation, there is no need to consider the outflow of the mixed rainwater and sewage.

[0048] The embodiment of the present invention determines the external water intrusion amount including groundwater infiltration and surface water infiltration by using the design flow, boundary flow meter data, and rainy day and dry day flow data, so that the evaluation of the external water intrusion amount is more comprehensive and accurate.

[0049] Based on the above-mentioned method for predicting the net water consumption of urban water supply, the present invention also provides a device for predicting the net water consumption of urban water supply. Figure 5 The device is described in detail.

[0050] Figure 5 The structure block diagram of the prediction device for the net water consumption of urban water supply according to an embodiment of the present invention is schematically shown, and the device can be used to implement the above method. Figure 5 As shown, the prediction device for the net water consumption of urban water supply in this embodiment includes a region division module, a preliminary calculation module and a net water consumption module.

[0051] The area division module is used to divide the independent metering area according to the water supply network data and the drainage network data; wherein the independent metering area is an area where both water supply and drainage can be closed and metered. In one embodiment, the area division module can be used to perform the operation S1 described above, which will not be repeated here.

[0052] The preliminary calculation module is used to calculate the water supply and drainage data based on the boundary flow meter data and user data of the independent metering area; wherein the water supply and drainage data includes at least one of the total water supply, the total sewage monitoring amount, the actual leakage amount, the external water intrusion amount and the sewage collection rate. In one embodiment, the preliminary calculation module can be used to perform the operation S2 described above, which will not be repeated here.

[0053] The net water consumption module is used to determine the net water consumption of the city water supply according to the water supply and drainage data. In one embodiment, the net water consumption module can be used to perform the operation S3 described above, which will not be described in detail here.

[0054] Figure 6 The block diagram of an electronic device suitable for implementing a method for predicting net water consumption of urban water supply according to an embodiment of the present invention is schematically shown.

[0055] like Figure 6 As shown, the electronic device 600 according to an embodiment of the present invention includes a processor 601, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 602 or a program loaded from a storage part 608 to a random access memory (RAM) 603. The processor 601 may include, for example, a general-purpose microprocessor (e.g., a CPU), an instruction set processor and / or a related chipset and / or a special-purpose microprocessor (e.g., an application-specific integrated circuit (ASIC)), etc. The processor 601 may also include an onboard memory for caching purposes. The processor 601 may include a single processing unit or multiple processing units for performing different actions of the method flow according to an embodiment of the present invention.

[0056] In RAM 603, various programs and data required for the operation of electronic device 600 are stored. Processor 601, ROM 602 and RAM 603 are connected to each other via bus 604. Processor 601 performs various operations of the method flow according to the embodiment of the present invention by executing the program in ROM 602 and / or RAM 603. It should be noted that the program can also be stored in one or more memories other than ROM 602 and RAM 603. Processor 601 can also perform various operations of the method flow according to the embodiment of the present invention by executing the program stored in the one or more memories.

[0057] According to an embodiment of the present invention, the electronic device 600 may further include an input / output (I / O) interface 605, which is also connected to the bus 604. The electronic device 600 may further include one or more of the following components connected to the I / O interface 605: an input portion 606 including a keyboard, a mouse, etc.; an output portion 607 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker, etc.; a storage portion 608 including a hard disk, etc.; and a communication portion 609 including a network interface card such as a LAN card, a modem, etc. The communication portion 609 performs communication processing via a network such as the Internet. A drive 610 is also connected to the I / O interface 605 as needed. A removable medium 611, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 610 as needed, so that a computer program read therefrom is installed into the storage portion 608 as needed.

[0058] The present invention also provides a computer-readable storage medium, which may be included in the device / apparatus / system described in the above embodiment; or may exist independently without being assembled into the device / apparatus / system. The above computer-readable storage medium carries one or more programs, and when the above one or more programs are executed, the method according to the embodiment of the present invention is implemented.

[0059] The embodiment of the present invention also includes a computer program product, which includes a computer program, and the computer program contains program code for executing the method shown in the flowchart. When the computer program product is run in a computer system, the program code is used to enable the computer system to implement the method provided by the embodiment of the present invention.

[0060] According to an embodiment of the present invention, the program code for executing the computer program provided by the embodiment of the present invention can be written in any combination of one or more programming languages. Specifically, these computing programs can be implemented using high-level process and / or object-oriented programming languages, and / or assembly / machine languages. Programming languages ​​include, but are not limited to, Java, C++, python, "C" language or similar programming languages. The program code can be executed entirely on the user computing device, partially on the user device, partially on the remote computing device, or entirely on the remote computing device or server. In the case of a remote computing device, the remote computing device can be connected to the user computing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computing device (e.g., using an Internet service provider to connect through the Internet).

[0061] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present invention. In this regard, each box in the flow chart or block diagram can represent a module, a program segment, or a part of a code, and the above-mentioned module, program segment, or a part of a code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flow chart, and the combination of the boxes in the block diagram or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0062] It will be appreciated by those skilled in the art that the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways, even if such combinations and / or combinations are not explicitly described in the present invention. In particular, the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways without departing from the spirit and teachings of the present invention. All of these combinations and / or combinations fall within the scope of the present invention.

[0063] The embodiments of the present invention are described above. However, these embodiments are only for the purpose of illustration, and are not intended to limit the scope of the present invention. Although each embodiment is described above, it does not mean that the measures in each embodiment cannot be used in combination. The scope of the present invention is defined by the attached claims and their equivalents. Without departing from the scope of the present invention, those skilled in the art may make various substitutions and modifications, which should all fall within the scope of the present invention.

Claims

1. A method for predicting net water consumption of urban water supply, characterized in that: include: Divide the independent metering area according to the water supply network data and the drainage network data; wherein the independent metering area is an area where both water supply and drainage can be closed and metered; Calculate water supply and drainage data based on the boundary flow meter data and user data of the independent metering area; wherein the water supply and drainage data includes at least one of the total water supply, the total sewage monitoring amount, the actual leakage amount, the external water intrusion amount and the sewage collection rate; Determine the net water consumption of the city water supply based on the water supply and drainage data; Among them, the calculation of water supply and drainage data includes: Using the boundary flow meter data of the independent metering area, the total water supply, the total sewage monitoring amount, the actual leakage amount and the external water intrusion amount are determined; Determining sewage collection rates using customer data in the independently metered areas; Wherein, the net water consumption of urban water supply is determined according to the water supply and drainage data, including: Using the principle of conservation of mass, the water balance calculation formula is obtained; Determine the net water consumption of the city water supply by using the water balance calculation formula and the water supply and drainage data; The water balance calculation formula is as follows: ； In the formula, the water balance calculation formula is as follows: It indicates the total amount of sewage monitoring that can be collected from drainage households corresponding to water supply households in the independent metering area; Represents the total water supply to water users within the independent metering area; It indicates the total net water consumption in the independent metering area, including industry, agriculture and residents' life; Indicates the actual leakage amount caused by visible leakage, hidden leakage, background leakage, pool or tank leakage and overflow in the water supply network within the independent metering area; represents the sewage collection rate; Indicates the amount of external water intruding into the sewage network in the area.

2. The method according to claim 1, wherein: The total water supply, the total sewage monitoring amount, the actual leakage amount and the external water intrusion amount are determined by using the boundary flow meter data of the independent metering area, including: Determine the total water supply by using the inflow and outflow boundary flow meter data of the independent metering area; the total water supply is the data difference between the inflow boundary flow meter and the outflow boundary flow meter; Determine the total amount of sewage monitoring using the total amount of boundary flow meter data of the downstream sewage trunk flow in the independent metering area; Determine the actual leakage amount by using the boundary flow meter data of the independent metering area at night; The external water intrusion amount is determined by using the design flow of the independent metering area and the boundary flow meter data.

3. The method according to claim 1, wherein: Using customer data from the independently metered area, determine the sewer collection rate, including: The number of water users and the number of sewage users in the independent metering area are determined, and the sewage collection rate is expressed as the ratio of the number of sewage dischargers in the area to the total number of water users in the area.

4. The method according to claim 2, wherein: Determining the actual leakage amount by using the boundary flow meter data of the independent metering area at night, including: Use boundary flow meters to determine the minimum nighttime flow in the area; The maximum legal water consumption at night is determined by the legal water consumption of residents at night and the number of water users; the maximum legal water consumption at night is the product of the legal water consumption of residents at night and the number of water users; The actual leakage amount is calculated using the minimum flow rate at night in the area and the maximum legal water consumption at night; the actual leakage amount is the difference between the minimum flow rate at night in the area and the maximum legal water consumption at night.

5. The method according to claim 2, wherein: The external water intrusion amount is determined by using the design flow of the independent metering area and the boundary flow meter data, including: Determine the amount of external water intrusion into groundwater based on the design flow and the maximum instantaneous flow of sewage in the area according to the boundary flow meter data; Determine the external water intrusion of surface water based on the rainy day flow and dry day flow data from the boundary flow meter of the main pipe node downstream of the sewage partition; The external water intrusion amount of the groundwater infiltration and the external water intrusion amount of the surface water infiltration are added together to obtain the total external water intrusion amount.

6. A device for predicting net water consumption of urban water supply, characterized in that: The device can be used to implement the method as claimed in any one of claims 1 to 5, and the device comprises: A region division module is used to divide independent metering areas according to water supply network data and drainage network data; wherein the independent metering area is an area where both water supply and drainage can be closed and metered; A preliminary calculation module, used to calculate water supply and drainage data based on the boundary flow meter data and user data of the independent metering area; wherein the water supply and drainage data includes at least one of the total water supply, the total sewage monitoring amount, the actual leakage amount, the external water intrusion amount and the sewage collection rate; The net water consumption module is used to determine the net water consumption of the urban water supply according to the water supply and drainage data.

7. An electronic device comprising: one or more processors; a storage device for storing one or more programs, When the one or more programs are executed by the one or more processors, the one or more processors execute the method according to any one of claims 1 to 5.

8. A computer-readable storage medium having executable instructions stored thereon, which, when executed by a processor, causes the processor to execute the method according to any one of claims 1 to 5.

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