JP4186773B2 - Water supply facility management system and water supply facility management method - Google Patents

Description

  The present invention relates to a water supply facility management system and a water supply facility management method.

  Currently, there are 46 water quality standard items and 48 items that complement the water quality standards. Water utilities regularly measure these items at taps, water sources, etc., and reflect them in the management of water supply facilities. For example, in Japanese Patent Laid-Open No. 2002-11460, a central monitoring center is provided, water quality of water sources, water treatment plants, and water distribution facilities is monitored for a plurality of water supply entities, and water quality is managed based on these information. Yes. Measurement items for management include oil, turbidity, and harmful substances (bioassay) at the water source, process data at the water purification plant, turbidity, residual salt at the water distribution facility, turbidity, and chromaticity. According to this method, management is unified and the accuracy of water quality management in each business entity can be improved.

JP 2002-11460 A

  Under the current water quality standards, it is necessary to measure all items regularly, and many and many water quality measurements are under heavy load on the maintenance work in small and medium-sized water utilities. However, the current revision of water quality standards includes the possibility of omitting inspection of water quality items in consideration of differences in water sources and regional characteristics of water sources. Omission of inspection leads to rationalization of management work, but it is necessary to select items that can be omitted based on sufficient grounds. On the other hand, the factor that increases the maintenance load is the deterioration of the facilities. The number of treatment plants that have been operating for a long time since construction has increased, and the local governments that own these treatment plants will either renew facilities or consolidate with other water purification facilities. When a water purification facility is integrated and abolished, the range managed by one water supply entity widens, so the range of management from the water source to the end extends over a wide area, increasing the load.

  On the other hand, there is a demand from customers for delicious water, and advanced treatment using activated carbon, ozone, or the like is performed at water purification facilities in various places. However, the quality of the water source is on the decline, and at the same time, a certain number of water quality accidents such as oil spills and ammonia nitrogen inflows occur. For this reason, from the viewpoint of information disclosure, the water supply entity also fully understands the entire water purification facility, including the quality of the water source, the management status of each process at the water purification facility, and the occurrence of red water caused by the transmission / distribution facility. Need to be.

Applying HACCP management to analyze hazards in water purification facilities in advance and focus on monitoring, management, and recording of the process of removing the cause of harm, thereby eliminating the need for water quality inspections, widening the area to be managed, and thorough water quality It is desirable to perform management at the same time and rationally. In addition, with regard to the sterilization process, which is an important process in the water purification process, it is possible to ensure the traceability of tap water during transmission / distribution by actually measuring residual chlorine and estimating the distribution of residual chlorine in the pipe network. It would be desirable to provide a system.

Water quality data storage means for storing water quality data from an automatic residual chlorine measuring device for automatically measuring residual chlorine after injecting a chlorine agent in a water purification facility, residual chlorine in a distribution facility, and residual chlorine in at least one water tap; , A diagnostic rule storage means for storing a diagnosis rule for diagnosing whether or not residual chlorine in water is within a predetermined residual chlorine specified value for each type of harm, and a sterilization process of the water purification facility for injecting a chlorine agent and a process data storage means for storing the process data and process data measuring device which measures the process data in the water distribution facility, by the diagnostic rule, the residual chlorine was measured by the residual chlorine automatic measuring apparatus for each type of hazard diagnose whether advance in the set within the residual chlorine prescribed value, the residual chlorine specified value deviant measurement point, deviates Characterized in that it has diagnostic means for recording the distillate chlorine measurements and deviant time, the deviant measurement point, and a residual chlorine distribution storing means to said the residual chlorine measured value and then the deviation deviates date to store .

Rationalization of management in water supply facilities, can ensure the traceability of tap water transmission and distribution at the time was based on the concentration distribution.

  In order to achieve this object, the embodiment of the present invention pre-analyzes all hazards that are assumed to occur due to ingestion of tap water, and based on the pre-analysis results, a certain level or more in preventing the occurrence of the hazards. A management system having a manufacturing device having a significance in advance and having a monitoring device and a monitoring result recording device for monitoring the management status of the manufacturing process continuously or at a considerable frequency, particularly related to the important sterilization step. Measures residual chlorine after injecting chlorine in water purification facilities, residual chlorine in water distribution facilities and residual chlorine in at least one water faucet, sterilization process for injecting chlorine agents and process data in water distribution facilities Process data measuring device, process data storage means for storing this, and residual chlorine measured by a residual chlorine automatic measuring device Diagnostic means for judging whether or not it is within the predetermined residual chlorine specified value for each type of harm, diagnostic rule storage means for storing this diagnostic rule, and at least residual chlorine is prescribed by the diagnostic rule The measurement point deviates from the value, the residual chlorine measurement value, and the residual chlorine distribution storage means for storing the date and time of departure. With such a configuration, it is possible to understand the situation of the occurrence of harm due to excess or deficiency of residual chlorine as well as rationalization of management in waterworks facilities by HACCP management, and at the time of harm to customers It becomes easy to explain the management status of waterworks facilities.

  Further, in the embodiment of the present invention, a pipe network data storage means for storing a pipe network model, a pipe diameter of a water pipe, a pipe length, a material, a connection relation between pipes, a demand pattern of water, process data, Estimated residual chlorine value obtained by the flow rate and residual chlorine estimation means, comprising a flow rate and residual chlorine estimation means for estimating the flow rate and residual chlorine in the pipeline every arbitrary time using water quality data and pipe network data On the other hand, when the diagnosis rule is applied and the estimated residual chlorine value deviates from the specified value, at least the deviated pipe line, the residual chlorine distribution storage means for storing the residual chlorine and the flow time in the pipe line, water quality data and Search / display means for searching and displaying process data, and data editing means for inputting and editing residual chlorine specified values set for each diagnosis rule and hazard type A. With such a configuration, the traceability of tap water can be obtained because the occurrence of excess or low residual chlorine and its area, the sterilization process for injecting the chlorine agent, and the operation status of the reservoir are clarified. .

  Moreover, in embodiment of this invention, it is set as the structure which has piping which connects the mutual transmission and water distribution facilities of several water purification facilities. When water from different water purification facilities is interchanged, water with different water quality is mixed and the water distribution area is substantially widened. As a result, for example, the residual chlorine at the end becomes low concentration, or a stagnant part is generated due to the change in flow rate in the pipe depending on the amount of accommodation. Management experience may not be applicable. By applying this management system in such a case, it is possible to estimate not only the effects of sterilization process operation control in water purification facilities and water distribution facilities, but also the impact of water interchange on residual chlorine, and grasp the management status of the facility It is effective for.

  Moreover, in embodiment of this invention, at the time of interchange of the water sent from different water purification facilities, it is set as the structure provided with the residual chlorine automatic measuring device in the pipe | tube with which different water mixes water. As a result, an actual measurement value of residual chlorine at a position where the influence of water interchange is large is obtained, which is effective for grasping the management state of the facility.

  In the embodiment of the present invention, the measurement of at least one of the ammonia concentration, turbidity, TOC, potassium permanganate consumption, and chlorine demand of water in the process prior to the sterilization process is obtained. It is configured to include means for performing continuously. These water quality items are related to the amount of chlorine agent required in the sterilization process and the consumption of residual chlorine due to the production of disinfection by-products such as trihalomethanes in the water supply and distribution facilities.

  With such a configuration, when residual chlorine in tap water deviates from the specified range at the water supply / distribution facility or water supply facility, not only the process data of purified water treatment, transmission / distribution of the tap water is grasped, You can get information on the quality of raw water. Therefore, by using these data, it becomes easy to estimate the cause of the residual chlorine deviating from the specified range.

  In the embodiment of the present invention, water supply facility water quality data and water quality data storage means, water supply facility equipment specifications and equipment specification storage means, hazardous substance toxicity data and hazardous substance toxicity data storage means, water supply facility process Hazard assessment means to estimate the amount of hazardous substances reaching customers by tap water using the data, water supply facility water quality data and water supply facility equipment specifications, and to evaluate the degree of harm to humans from the amount of hazardous substances and hazardous substance toxicity data The apparatus has a hazard assessment means and a hazard assessment model storage means for storing hazardous substance toxicity data.

  In addition, as a data to be used for hazard assessment by hazardous substances, it has a means to estimate the water quality at the water intake facility using at least one of the agricultural chemical usage data in the watershed serving as the water source and the specific plant emission data It is said.

  Furthermore, in the embodiment of the present invention, using the hazard analysis result and the equipment specification, the important management process selecting means for selecting the priority management process, measuring the removal performance of the target hazardous substance in the important management process, and the priority management process Criteria for selecting a monitoring method for measuring or estimating the concentration of the hazardous substance later, and for selecting a monitoring method selection means and a monitoring standard value necessary for managing the priority management process by the selected monitoring method And a value selection means. With such a configuration, it becomes possible to manage the operation of the facility and measure the water quality in consideration of the amount of hazardous substances depending on the region and the water source, so that the management of the water supply facility can be rationalized.

  FIG. 1 is a functional block diagram of a water supply facility management system according to the present invention.

  The management system of the water supply facility according to the present embodiment includes a measuring device and an information management system 2000, and is roughly composed of a HACCP system 1000, a pipe network calculation unit 1100, a data editing unit 30, and a display unit 31. . Among these, the HACCP system 1000 and the pipe network calculation means 1100 are divided into water quality / process data 100, data storage means 110, and estimation / diagnosis means 120.

  The water quality / process data 100 includes water quality data 2 and process data 3. Residual chlorine is sent from the automatic residual chlorine measuring devices 1A to 1C, and process data is sent from each facility. Residual chlorine automatic measuring instruments 1A, 1B, and 1C are installed in each part of the water distribution facility 52 and the water supply facility 53 after the sterilization step 51 in the water purification facility. The process data includes the amount of chlorine agent supplied in the sterilization step 51, the amount of treated water, the flow rate in the water distribution facility 52, water pressure, water temperature, and the like. These data are configured to be collected online using the communication system 3000. As the communication system 3000, in addition to a dedicated line, a public telephone line, the Internet, an optical fiber communication network, or the like can be used.

  The data storage unit 110 includes a water quality data storage unit 11, a process data storage unit 12, a pipe network data storage unit 13, a diagnostic rule storage unit 14, and a residual chlorine distribution storage unit 15. The water quality data storage means records residual chlorine and water temperature measurement results. The process data storage means 12 records process information in the sterilization process and the water distribution facility. On the other hand, the pipe network data storage means 13 contains pipe network models, pipe diameters, pipe lengths, materials, pipe connections, water pressure, and water demand patterns for pipe network calculations. It is recorded.

  The estimation / diagnosis unit 120 includes a flow rate and residual chlorine estimation unit 21 and a diagnosis unit 22. The flow rate and residual chlorine estimation means 21 calculates the flow rate, flow time and residual chlorine in the sequential pipe network from the water quality data, process data and pipe network data. The diagnosing means 22 makes a diagnosis regarding the estimated value of residual chlorine and the measured value of residual chlorine according to a rule preset in the diagnostic rule storage means 14. The result of diagnosis is stored in the residual chlorine distribution storage means 15.

  The data editing means 30 is used when correcting or changing water quality data, process data, pipe network data, and diagnostic rules, and appropriately responds to changes in the pipe network due to pipe renovation and laying. The retrieval / display means 31 retrieves necessary information from various data recorded in the water quality data storage means 11, the process data storage means 12, the pipe network data storage means 13, the diagnostic rule storage means 14 and the residual chlorine distribution storage means 15. ,indicate.

  FIG. 2 shows a flow chart in the flow rate and residual chlorine estimation means 21. In the data reading process 301, the expected demand pattern, the pipe network model, the process data, and the actual measured value of the flow rate are read to calculate the flow rate. Next, the actual value and the estimated value of the flow rate are compared, and the demand pattern is adjusted as necessary. Then, after the flow rate calculation is completed, the residual chlorine concentration is estimated.

  FIG. 3 shows a flowchart in the diagnostic means 22. In the data reading process 401, the specified values A1 and A2 (A1 <A2) of residual chlorine, measured values, estimated values, respective ranges and flow-down times are read. Here, the specified value A1 of residual chlorine relates to the possibility of acute serious health hazards to consumers due to bacteria and microorganisms. If the measured or estimated value is less than A1, there is a shortage of residual chlorine in the range of the pipe network, and there is an acute and serious health hazard to consumers due to bacterial and microbial contamination and growth in the pipe. Increased risk. On the other hand, A2 relates to generation of chlorine odor due to excessive chlorine, and this harm is designated as hazard 2. When the actual measurement value or the estimated value is larger than A2, excessive chlorine is present in the tap water. Although the possibility of harm by bacteria and microorganisms excluding chlorine-resistant pathogenic microorganisms such as Cryptosporidium is low, since the odor of chlorine is generated, the risk of acute health effects is low, but it is harmful to consumers.

Next, the date and time when each water was in the water purification process and the distribution reservoir is calculated from the position of the distribution pipe and the flow-down time in the manufacturing date calculation process 402. Next, the measured value or estimated value of residual chlorine is compared with the specified value A1. If the value is smaller than A1, the actual measurement value or the estimated value, its range, and the date and time obtained in the machining date calculation step are recorded as the possibility of occurrence of harm 1. Next, the measured value or estimated value of residual chlorine is compared with the specified value A2. If the value is larger than A2, the actual measurement value or the estimated value, its range, and the date and time obtained in the machining date calculation step are recorded as those that may cause harm 2.

  According to the present embodiment, by applying HACCP to the management of water supply facilities, it is possible to appropriately carry out the intensive monitoring, management and recording of the process of removing the cause of harm, thereby rationalizing the management. In addition, according to the present embodiment, the correspondence between the excessive or insufficient residual chlorine and its area and the operation status of the chlorine agent injection process becomes clear, and the traceability of tap water can be obtained. In addition, according to the present embodiment, the distribution of residual chlorine when water of different water quality is mixed is more accurately grasped by actual measurement and estimation of residual chlorine at the time of water interchange between a plurality of water purification facilities. It is possible to obtain the correspondence with the conditions, and to obtain the traceability of tap water during operation in a wide area.

  FIG. 4 shows a block diagram of another embodiment according to the present invention. This embodiment is an example in which the water supply facility management system shown in FIG. 1 is applied to a plurality of water supply facilities where water is interchanged. Residual chlorine automatic measuring devices 1A to 1F are installed in the water supply facility A50 and the water supply facility B60. Further, the water supply facility A50 and the water supply facility B60 are connected by a connecting pipe 64 after the water supply process, and the residual chlorine automatic measuring device 1G is installed in the connecting pipe 64. The measurement data by the automatic residual chlorine measuring devices 1A to 1G and the process data of the water supply facility A50 and the water supply facility B60 are all transmitted via the communication system 3000 and recorded in the water quality data storage means 11 and the process data storage means 12. It has become.

  At this time, the installation location of the automatic residual chlorine measuring device 1G installed in the connecting pipe 64 may be a pipe not only within the range of the connecting pipe 64 but also water mixed from different waterworks facilities.

  The piping for installing the residual chlorine automatic measuring device 1G may be any material, but by using a pipe with a large residual chlorine concentration reduction rate coefficient, such as a non-lining pipe or a mortar lining pipe, The degree of degradation can be evaluated in detail.

  FIG. 5 shows a block diagram of another embodiment according to the present invention. In this embodiment, a continuous water quality measuring device that continuously measures at least one of the ammonia concentration, turbidity, TOC, potassium permanganate consumption, and chlorine demand of raw water in the water supply facility management system shown in FIG. 8 and external factor storage means 16 for storing weather data such as rainfall.

FIG. 6 shows a functional block diagram of another embodiment of a waterworks facility management system according to the present invention. The water supply HACCP examination system 4000 according to the present invention is roughly composed of water quality / process data 100, data storage means 110, estimation / diagnosis means 120, data editing means 30, and display means 31.

  The water quality / process data 100 includes process data 3, specific workplace emission material data 4, agricultural chemical usage data 5, water quality data 6, meteorological data 7, and hazardous substance toxicity data. These data are stored in the external factor storage means 16, the process data storage means 12, and the water quality data storage means 11 of the data storage means 110.

  The data storage unit 110 further includes a hazard assessment model storage unit 17, a facility / equipment specification storage unit 18, and a management work storage unit 19.

  The hazard assessment model storage means 17 stores toxicity substance toxicity data and the like and hazard assessment rules that cause health damage in the water supply. The facility / equipment specification storage means 18 stores the civil engineering information of the facility, the specifications of the electrical equipment, and the processing performance in each processing step. Here, the processing performance in each processing step may be a constant value, but it is desirable to use a value according to the quality of the water source water and the operating conditions of the process. Further, the management work storage unit 19 stores information such as a business manual and work procedure manual for maintaining and managing the facility, and monitoring conditions obtained by the estimation / diagnosis unit 120.

  The estimation / diagnosis unit 120 includes a hazard assessment unit 23, a priority management process selection unit 24, a monitoring method selection unit 25, and a reference value selection unit 26.

  The data editing means 30 is used when correcting or changing various data in the data storage means 110, and is used to appropriately cope with changes such as changes in facilities and changes in raw water quality. The retrieval / display unit 31 retrieves necessary information from various data recorded in the data storage unit 110 and displays it.

  FIG. 7 shows a flowchart in the hazard assessment means 23. Here, how much harm each hazardous substance has is evaluated.

  In the evaluation condition input 601, the hazardous substance to be evaluated is input. This includes chemicals such as pathogenic bacteria, microorganisms, and arsenic, as well as indicators that are harmful to consumers such as turbidity and chromaticity. Next, the discharge amount of hazardous substances from specific business establishments, analytical data of agricultural chemical usage or water source water quality, weather information, amount of treated water, treatment performance of each treatment process of waterworks facilities, amount of chemicals added, amount of hazardous substances, Read information such as toxicity data. Next, the concentration of hazardous substances in water intake is calculated from the above data. Next, the concentration when the target hazardous substance is released into the water by adding chemicals, filtering, etc. in the water purification process and the sending / distributing process is evaluated. Next, if a hazardous substance reaches a consumer without being removed at a water purification facility or a transmission / distribution facility, a hazard index is calculated (W1). Hazard indicators can be simple ones that multiply the estimated risk of consumers by the degree of health damage, or reference tolerance values proposed by WHO. Next, a harm index is calculated when the removal rate in each process is taken into account (W2). You may use past water quality data to evaluate when the weather conditions, facility operating conditions, etc. are different, and use the hazard assessment on a specific day.

  FIG. 8 shows a flowchart in the priority management process selection means 24. Here, the process which needs to be managed as a particularly important process is selected from each processing process in the water supply facility using the hazard evaluation result.

The hazard index calculated by the hazard assessment means 23 is compared with the upper limit value (W0) set by the user. First, W0 is compared with W1, and if W0 is larger than W1, the health effect is small, so it is not an important management process. If W0 is smaller than W1, then W0 and W2 are compared.
If W0 is smaller than W2, a process in which the harmful substance removal efficiency takes a high value above a certain level is extracted and set as an important management process. If W0 is smaller than W2, this hazardous substance removal will exceed the acceptable range of the customer at the evaluated facility, so the process will be improved and the process will be reviewed and evaluated again. .

  FIG. 9 shows a flowchart in the monitoring method selection means 25. Here, a monitoring method for monitoring the operating state of the set priority management process selecting means 24 is selected.

  The water supply is characterized by the possibility that hazardous substances may be added to the water supply / distribution facility or water supply facility to the water with a sufficiently low concentration of the hazardous substance manufactured at the water purification facility, except for additional chlorine injection at the water distribution facility. There is no way to remove the added hazardous substances.

  First, in the priority management process selected by the priority management process selection means 24, it is determined whether or not there is a monitoring method capable of directly or indirectly measuring the removal state of the target hazardous substance. If not, consider new monitoring methods. If there is a monitoring method, determine whether it is possible to measure at the required frequency. If this is not possible, review the monitoring method. If there is, select that method as the monitoring method in the critical management process.

  Next, it is determined whether there is a change in the concentration of the target hazardous substance in a facility subsequent to the important management process, for example, a water distribution facility. If there is no change, the monitoring setting after the critical management process shall be the frequency specified by law. If there is a change, it is determined whether continuous measurement is possible with the water tap. If continuous measurement is possible, select that method as the monitoring method. On the other hand, if continuous measurement is not possible, it is determined whether or not the concentration of harmful substances in the faucet can be estimated by calculating the pipe network. If estimation is possible, manage by periodic analysis and estimation of hazardous substances in the faucet. On the other hand, if estimation is not possible, review the monitoring method or the evaluation method by calculation.

  The reference value selection means 26 calculates a reference value when managing the target important management process by the selected monitoring method, and records this reference value in the management work storage means 18. According to the present embodiment, by applying HACCP to the management of water supply facilities, it is possible to appropriately carry out the intensive monitoring, management and recording of the process of removing the cause of harm, thereby rationalizing the management. In addition, according to the present embodiment, the correspondence between the excessive or insufficient residual chlorine and its area and the operation status of the chlorine agent injection process becomes clear, and the traceability of tap water can be obtained.

  In addition, according to the present embodiment, the distribution of residual chlorine when water of different water quality is mixed is more accurately grasped by actual measurement and estimation of residual chlorine at the time of water interchange between a plurality of water purification facilities. It is possible to obtain the correspondence with the conditions, and to obtain the traceability of tap water during operation in a wide area.

  In addition to streamlining management at waterworks facilities, it is possible to ensure traceability of tap water during transmission and distribution based on estimation of concentration distribution.

The functional block diagram which shows one Example of the management system of the waterworks facility by this invention. Explanatory drawing which shows an example of the processing flow performed in a flow volume and a residual chlorine estimation means. Explanatory drawing which shows an example of the processing flow performed in a diagnostic means. The functional block diagram which shows the other Example of the management system of the waterworks facility by this invention. The functional block diagram which shows the other Example of the management system of the waterworks facility by this invention. The functional block diagram which shows the other Example of the management system of the waterworks facility by this invention. Explanatory drawing which shows an example of the processing flow performed in a hazard evaluation means. Explanatory drawing which shows an example of the processing flow performed in a priority management process selection means. Explanatory drawing which shows an example of the processing flow performed in the monitoring method selection means. Explanatory drawing which shows an example of the processing flow performed in a reference value selection means.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1A-1G ... Residual chlorine automatic measuring device, 8 ... Continuous water quality measuring device, 10A-10D ... Process data measuring device, 100 ... Water quality / process data, 110 ... Data storage means, 120 ... Estimation / diagnosis means, 1000 ... HACCP system DESCRIPTION OF SYMBOLS 1100 ... Pipe network calculation means, 2000 ... Information management system, 3000 ... Communication system, 4000 ... Water supply HACCP examination system.

Claims (5)

An automatic residual chlorine measuring device that automatically measures residual chlorine after injecting a chlorine agent in a water purification facility, an automatic residual chlorine measuring device that automatically measures residual chlorine in a water distribution facility arranged downstream of the water purification facility, and the above Water quality data storage means for storing water quality data from an automatic residual chlorine measuring device that automatically measures residual chlorine at at least one water tap located downstream of the water distribution facility, and residual chlorine in the water are harmful to consumers Diagnose whether the specified value of residual chlorine is within the specified value of residual chlorine for each type of hazard as the specified value of residual chlorine, and use at least the measured value or estimated value of residual chlorine at the faucet used by consumers Diagnostic rule storage means for storing diagnostic rules for diagnosing the hazard of residual chlorine concentration, process data in the sterilization process of the water purification facility for injecting chlorine agent, and the above Process data storage means for storing the process data obtained by a process data measuring device for measuring process data in a water facility, water quality data stored in the water quality data storage means, and processes stored in the process data storage means with the flow rate and residual chlorine estimating means for estimating a residual chlorine from the data, by the diagnostic rule storage means stored in the said diagnostic rule, measured by the residual chlorine automatic measuring device after implantation of pesticides in water treatment facility wherein Residual chlorine measurement values in water purification facilities, distribution facilities, and faucets, or estimated residual chlorine values estimated by the flow rate and residual chlorine estimation means are pre- defined for each type of hazard as a specified value of residual chlorine that would harm consumers. compared to the set residual chlorine specified value to diagnose whether in residual chlorine prescribed value, The measurement point that deviated from the specified residual chlorine value, the diagnostic means for recording the deviated residual chlorine measurement value and the date and time of departure, the deviated measurement point diagnosed by the diagnostic means, the deviated residual chlorine measurement value or the residual chlorine A water supply facility management system comprising: a residual chlorine distribution storage means for storing an estimated value and the date and time of departure. In the management system of water supply facilities according to claim 1, the tube network model of a tube network hydrant from distribution water facilities, pipe diameter of water pipes, pipe length, connection relationship between the tubes, and demand pattern of water The pipe network data storage means for storing the pipe network data, the search / display means for searching and displaying the water quality data and the process data, and the residual chlorine specified value set for each type of diagnosis rule and hazard Data editing means for editing, using the process data, the water quality data and the pipe network data, the flow rate and residual chlorine in the pipeline every arbitrary time by the flow rate and residual chlorine estimation means The diagnosis means determines whether the flow rate and the estimated residual chlorine value obtained by the residual chlorine estimation means are within the specified value by the diagnosis means, Record the pipe line where the estimated residual chlorine value deviates from the residual chlorine specified value, the residual chlorine value in the pipe line and the flow down time in the pipe network, and the pipe line where the residual chlorine distribution storage means deviates from the specified value, A water supply facility management system that stores residual chlorine in the pipe and the flow-down time.   2. The water supply facility management system according to claim 1, wherein the water distribution facility includes pipes that allow accommodation of water treated in a plurality of water purification facilities. 3.   2. The water supply facility management system according to claim 1, wherein the water distribution facility includes a pipe that allows accommodation of water treated in a plurality of water purification facilities, and an automatic residual chlorine measuring instrument is provided in the pipe. 3. A management system for waterworks facilities, comprising:   The water supply facility management system according to claim 1, wherein the installation location of the automatic measuring device for residual chlorine in the water distribution facility is a non-lining pipe or a mortar lining pipe having a large residual chlorine concentration reduction rate coefficient. Management system.

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