JP2003306957A - Water distribution system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water distribution system in which an abnormality in an apparently normal water level of a water level gauge in a water distribution reservoir range is accurately judged and an abnormal position can be specified. <P>SOLUTION: Water delivery rates T, A, B from the preceding conveying pumps 5, 12A. 12B are compared with the sum quantity of the distribution flow rates a, b, c and the sum of the water delivery rates A, B to the following distribution reservoir, in the respective water delivery reservoirs 7A, 7B, 7C. When the difference is out of a specified range, as it is judged that an abnormality has been generated in the corresponding water delivery reservoir, even when such a trouble that the water level gauge signal is fixed within a normal range generates, in the water level gauges 8A, 8B, 8C of the water distribution reservoir, it can be early detected. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water distribution system capable of detecting an abnormality in a water level gauge, which is an instrumentation device of a distribution reservoir facility, or detecting an abnormality in the overall flow balance in a water supply system during water supply and distribution of water supply. Regarding the system.

[0002]

2. Description of the Related Art In a general municipal water supply system, raw water is taken from an intake well at a water source by an intake pump and sent to a water purification plant. This water purification plant produces a required amount of water that meets the water quality standards for consumers, including ordinary households.

[0003] Normally, water is supplied to consumers by pumping water from a water purification plant by a water pump through a water flow meter to a reservoir.
The water is supplied from the distribution reservoir to consumers by gravity flow.

In this case, in the water distribution system to the consumer, the life rhythm of people directly appears as a change in the water supply amount (demand water amount). That is, in general, the daily change is that the water demand is high during the day and low at night. Also,
This water demand also changes in four seasons such as spring, summer, autumn, and winter.

In order to keep the water level stable, the water level in the distribution reservoir must be kept constant to cope with this change in the demanded water amount. There were various problems.

FIG. 7 shows the relationship of the water level gauge signal with respect to the water level of the distribution reservoir. From the figure, the water level gauge of the distribution reservoir outputs an electric signal in the range of 4 to 20 mA for a water level of 0 to 12 m under normal conditions, and uses this as a signal for monitoring and control.

Among them, the monitoring function is a monitoring system that notifies the operator when an abnormally high water level HH of the distribution reservoir or an abnormally low distribution water level LL occurs and copes with the abnormality.
Further, in the control function, in order to keep the water level of the distribution reservoir within a certain range for stable supply to users, the operating water level L and the stop water level H of the water pump installed at the water purification plant are set, and the water purification pump cleans the water. By controlling the amount of water sent from the site, the water level in the reservoir is automatically maintained within a certain range.

In this case, two water level gauges are installed to cope with the water level gauge failure, and the water level difference between the two water level gauges is used to detect the failure of the water level gauge, or even if one fails, one Enables backup as a backup to improve system reliability.

If the water level gauge of the distribution reservoir is normal, the output current value range of the water level gauge is 4 to 20 mA, and the water level indicates 0 to 12 m. Normally, when the water level gauge is out of order, the electric signal in the current value range of 4 to 20 mA is 0 m.
Since the status becomes A, and the monitoring function can determine that there is an abnormality, the occurrence of a failure can be grasped at an early stage, and the failure repair can be dealt with promptly.

[0010]

However, even if the actual water level changes in the water level gauge, the water level signal is within the range of the current value of 4 to 20 mA due to the failure of the electric system, for example, A in the figure.
When an abnormality occurs in which the potential is fixed to the potential corresponding to the LM point, the water level gauge continues to output an apparently normal water level signal, which cannot be detected by the monitoring function as an abnormality.

If this abnormality occurs while the water pump is operating, the water level signal is fixed at a water level lower than the water pump stop water level, and the water pump continues to operate. Therefore, the water level in the distribution reservoir will become abnormally high, and the distribution reservoir will overflow, resulting in losses due to runoff accidents from the distribution reservoir and excessive production of water supply.

On the other hand, when this abnormality occurs when the water pump is stopped, the water level signal is fixed at a water level higher than the operating water level of the water pump, so that the operation is not performed. Therefore, the water level in the distribution reservoir will continue to drop, and eventually the water will run out and the water supply will be cut off.

An object of the present invention is to accurately judge an abnormality in an apparently normal water level range of a water level gauge in a reservoir,
Moreover, it is to provide the water distribution system which can specify the abnormal part.

[0014]

A water distribution system according to the present invention has a water purification plant and a plurality of water reservoirs configured in multiple stages. The first stage water reservoir receives water from a water purification plant by a water supply pump, and a water pump other than the last stage. Each of the reservoirs has a water pump that feeds the water from its own reservoir to the next stage reservoir, and each reservoir is equipped with water distribution facilities for consumers. Water flow meters installed in distribution reservoirs other than the terraces to measure the flow rate of water to the corresponding distribution reservoirs, and water level meters installed in each of the reservoirs to measure the water level of each reservoir and the distribution flow rate to measure each distribution flow rate. Input the total water level of each distribution reservoir and the water level of the corresponding distribution reservoir, and according to the water level of the corresponding distribution reservoir, the water supply control means that controls the operation of the water supply pump located at the upstream side of that distribution reservoir, and for each distribution reservoir at fixed time intervals. Flow rate of water pump located in front of It is equipped with means for judging each reservoir by comparing the total amount of water flow to the next stage and the total value of its own distribution flow, and if the difference is outside the specified range, it judges that there is an abnormality in the corresponding distribution reservoir. And

Further, according to the present invention, the flow rate of water supplied from the water purification plant and the total value of the flow rate of water distributed from each reservoir are compared at regular intervals, and if the difference is outside the predetermined range, it is determined that a problem has occurred. An overall judging means for judging may be added.

Further, in the present invention, the values measured by the respective measuring devices provided in the water purification plant and each distribution reservoir are transmitted from the respective terminals provided in the water purification plant and each distribution reservoir to the central monitoring system through the communication line, and the central monitoring system is provided. The monitoring system may be configured to perform integration and determination processing.

Furthermore, the present invention has a monitoring function equivalent to that of the central monitoring system, can exchange information with terminals of other water systems, and can execute monitoring control processing in place of the central monitoring system. The monitoring system may be connected to a communication line.

In each of these inventions, in each distribution reservoir, a comparison is made between the water flow rate from the water supply pump located on the front stage side and the total value of the water flow rate from its own reservoir and the water flow rate to the next stage reservoir. However, if the difference is outside the specified range, it is determined that an abnormality has occurred in the corresponding reservoir, so even if the water level gauge in the reservoir has a failure that is fixed by the water level signal within the normal range, this can be promptly detected. Can be detected.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a water distribution system according to the present invention will be described below with reference to FIGS.

FIG. 2 is an integrated graph showing a daily change pattern of the distribution flow rate from midnight to 23:00, with the horizontal axis representing time and the vertical axis representing the distribution flow rate Q1. The distribution flow rate Q1 is low from 22:00 to before 7:00 in the morning, and it is shown that after 7:00 in the morning, it peaks in the daytime from 8:00 to 11:00.

Further, the flow rate signal indicating the distribution flow rate is generally handled as two types, an instantaneous value and an integrated value. Of these, the instantaneous value is a certain point of the signal that continuously changes in time series. The distribution flow rate value of, for example, point D is shown. The integrated value indicates a value obtained by integrating (integrating) the amount of water that has flowed on an hourly or daily basis, for example, the area E.

On the other hand, the water flow rate is such that the water flow rate is as shown in FIG. 3 because water is fed only when the water pump is operating. In FIG. 3, the horizontal axis represents time t, and the vertical axis represents the water supply flow rate Q2. The rectangular portion F indicates the time when the water supply pump is operating, and the void portion G indicates when the water supply pump is stopped.

The water flow rate (produced water quantity) and the distribution water flow rate (demand water quantity) are usually almost the same in a day unit.

An embodiment of the present invention to which this principle is applied will be described with reference to FIGS. 1, 4 and 5.

In FIG. 1, the water distribution system of the present invention has a water purification plant 4 and a plurality of (three as shown by suffixes A, B, and C in the example of the drawing) water distribution reservoirs 7 configured in multiple stages.
Further, an intake pump 2 is installed in the intake well 1 for intake of raw water, and an output side of the intake pump 2 is connected to a water purification plant 4 via an intake flow meter 3. The water purification plant 4 produces a required amount of water that meets the water quality standard for consumers including general households.

The water purification plant 4 is connected to the first stage distribution reservoir 7A via a water supply pump 5 and a water flow meter 6, and the purified water is supplied from the water purification plant 4 to the distribution reservoir 7A by the water supply pump 5 and the water supply is performed. The flow rate is measured by the water flow meter 6.
The outputs of the intake water flow meter 3 and the water flow meter 6 described above are sent to a terminal 9, which communicates with a communication line 10 such as an NTT line.
And is connected to the central monitoring system 11. The central monitoring system 11 has a computer / sequencer 11A, to which a CRT monitoring device 11B for plant monitoring and a printer 11C are connected.

A water level gauge 8A for measuring the water level and a water feed pump 12A are installed in the first-stage reservoir 7A. This water supply pump 12A uses the water in the reservoir 7A for the next stage reservoir 7B.
Send to. Further, the distribution reservoir 7A is provided with a distribution facility for distributing water to the consumers by natural flow. The water distribution facility is provided with a water distribution flow meter 13A, and measures the water distribution flow rate to the consumer. Further, the water supply system by the water supply pump 12A has a water supply flow meter 14A, and the next stage distribution reservoir 7B.
Measure the amount of water sent to.

Outputs of the water level meter 8A, the distribution flow meter 13A, the water flow meter 14A, etc. are sent to a terminal 15 provided corresponding to the distribution reservoir 7A. This terminal 15 is also NTT
Central monitoring system 11 via a communication line 10 such as a line
It is connected to the.

The water reservoir 7B is also provided with a water level gauge 8B for measuring its own water level and a water feed pump 12B to the next stage water reservoir 7C, and a water flow meter 14B is provided in this water feed system. In addition, we have water distribution facilities to distribute water to customers,
A water flow meter 13B is provided.

Outputs of the water level meter 8B, the water flow meter 14B, the water flow meter 13B and the like are sent to a terminal 16 provided corresponding to the water reservoir 7B. This terminal 16 is also NT
Central monitoring system 1 via a communication line 10 such as a T line
Connected to 1.

The final stage distribution reservoir 7C has a water level meter 8C and a distribution flow meter 13C provided in a facility for distributing water to consumers. The outputs of the water level meter 8C and the distribution flow meter 13C are connected to a terminal 17 provided corresponding to the distribution reservoir 7C, and the terminal 17 is connected to the central monitoring system 11 via a communication line 10 such as an NTT line. There is.

In such a system configuration, the water produced in the water purification plant 4 is pressure-fed by the water feed pump 5 and supplied to the water reservoir 7A through the water flow meter 6. At this time, the water flow rate T from the water purification plant 4 is measured by the water flow rate meter 6.

The water pump 5 of the water purification plant 4 receives the water level signal from the water level meter 8A of the water reservoir 7A, and the water level of the water reservoir 7A falls within a certain range, that is, the water pump stop water level H and the water pump operating water level L in FIG. The automatic operation is controlled to be within the range.

At the distribution reservoir 7A, water is distributed to consumers by the distribution facility, and the distribution flow rate a is measured by the distribution flow meter 13A. Further, a part of the water stored in the distribution reservoir 7A is pressure-fed and supplied to the next-stage distribution reservoir 7B by the water supply pump 12A, and the water supply flow rate A is measured by the water supply flow meter 14A.

At this time, the water pump 12A of the water reservoir 7A receives a water level signal from the water level meter 8B of the water reservoir 7B at the next stage so that the water level of the water reservoir 7B is within a certain range (the water pump stop water level H in FIG. It is automatically operated so as to be within the range of water level L).

Similarly, the next-stage distribution reservoir 7B and distribution reservoir 7C
Then, water is distributed to the consumers by each water distribution facility, and the distribution flow rates b and c are measured by the distribution flow meters 13B and 13C. Further, a part of the water stored in the distribution reservoir 7B is pressure-fed and supplied to the final-stage distribution reservoir 7C by the water supply pump 12B, and the water supply flow rate B is measured by the water supply flow meter 14B.

At this time, the water supply pump 12B of the distribution reservoir 7B
Also, by the water level signal from the water level gauge 8C of the final stage distribution reservoir 7C, the automatic operation is performed so that the water level of the distribution reservoir 7C falls within a certain range (range between the water pump stop water level H and the water pump operating water level L in FIG. 7). To be done.

The water level signals measured by the pond water level gauges 8A, 8B and 8C are transmitted to the central monitoring system 11 by the corresponding terminals 15, 16 and 17 to the water pumps 5, 12A and 12B located in the preceding stage. The automatic operation is executed by the water supply control means set in the computer / sequencer 11A of the central monitoring system 11.

Further, the flow rate T of the water supplied to the respective distribution reservoirs 7A, 7B and 7C measured by the water flow meters 6, 14A and 14B,
A and B are transmitted to the central monitoring system 11 by the corresponding terminals 9, 15 and 16, and further, the distribution flow meter 13A,
Reservoir 7A, 7B, 7C measured at 13B, 13C
The distribution water flow rates a, b, c from the corresponding terminals 15, 1
It is transmitted to the central monitoring system 11 by 6 and 17 and used for monitoring control.

The control procedure of the monitoring control performed by the central monitoring system 11 will be described with reference to the flowchart of FIG.

In the figure, the flow rates T, A, B of the water distributions 7A, 7B, 7C and the flow rates a, b, c of the water distribution reservoirs 7A, 7B, 7C are input in real time. Save and convert these flow rate signals to integrated values (the code is commonly used for flow rate signals and integrated values)
Save (processing step S101). As shown in FIG. 5, as the integrated value, a value obtained by integrating the flow rate for the past n hours at a predetermined cycle is used.
That is, the distribution flow rate integrated value a + the distribution flow rate integrated value b + the distribution flow rate integrated value c are calculated and stored (processing step S10).
2) It is compared whether or not the integrated value T of the water supply flow rate and the integrated value of the total distribution water flow rate are substantially equal (within a predetermined range) (processing step S103).

When the comparison results are almost the same, the flow balance of the water supply system is normal, and 7A, 7 of each reservoir
The water level gauges 8A, 8B and 8C of B and 7C are also considered to be normal. On the contrary, if different, 7A, 7B of each reservoir,
It is judged that there is an abnormality in any of the water level gauges 8A, 8B, 8C of 7C, and the state of excessive water supply or water supply stoppage has occurred. That is, the presence / absence of abnormality in the entire equipment is checked in step S103, and it functions as an overall determination means.

When it is determined that there is something wrong with the equipment, it is then determined which of the distribution reservoirs 7A, 7B, 7C the water level gauges 8A, 8B, 8C have an abnormality with. Detect every time. This detection is carried out by each distribution reservoir 7A, 7B, 7C.
Water pump 5, 12A, 12B located in the previous stage in
This is done by comparing the amount of water to be sent from the water with the amount of water flowing out to the next-stage distribution reservoirs 12B and 12C and the customers.

First, with respect to the distribution reservoir 7A, the integrated value T of the water supply flow rate of the water supply pump 5 in the preceding stage and the total value of the integrated value A of the distribution water flow rate + the integrated value A of the water supply flow rate A are compared, and the values are substantially in agreement (within the predetermined range). ) Or different (outside the predetermined range) is determined (processing step S104).

If there is a difference in this judgment, it is judged that the equipment of the distribution reservoir 7A is out of order and the processing is performed (processing step S10).
8).

On the other hand, when they are almost the same, the same judgment processing is performed for the next-stage distribution reservoir 7B. That is, the water supply flow rate integrated value A of the water supply pump 12A at the preceding stage is compared with the total value of the distribution water flow rate integrated value b + the water supply flow rate integrated value B, and it is determined whether they are substantially the same or different (processing step S105). .

If the result of this judgment is different, it is judged that the equipment of the distribution reservoir 7B is out of order and is processed (processing step S10).
9).

On the other hand, when they are almost the same, the same determination process is performed for the final stage distribution reservoir 7C. That is,
The integrated value B of the water supply flow rate of the water supply pump 12B at the preceding stage and the integrated value c of the distribution water flow rate c are compared, and it is determined whether or not they are substantially the same (process step S106).

If the result of this judgment is different, it is judged that the equipment of the distribution reservoir 7C is out of order and the processing is carried out (processing step S11).
0).

When they are almost the same, it is necessary for the human system to judge, that is, the human system investigates the cause of the difference between the cumulative value T of the water supply and the total cumulative value of the distribution water flow (processing step S107). ).

That is, the processing steps S104 to S1.
10 functions as a determination unit for each pond.

A concrete numerical data is applied to this series of routine processes and the description is as follows.

That is, the integrated value when the distribution flow rate a = 50 m ³ / h, the distribution flow rate b = 100 m ³ / h, and the distribution flow rate c = 150 m ³ / h continuously flow for n = 3 hours,
It will be as follows.

Integrated value of distribution flow rate a = 150 m^Three Integrated water flow rate b = 300m^Three Integrated flow rate c = 450m^Three Total water flow rate = 900m^Three At this time, for example, the integrated value T of the water supply flow rate is 1050 m^ThreeWhen
If so, the result of comparison processing in processing step S103
As a result, the next processing step is judged as “different”.
The comparison process in S104 is executed. And the water flow
Integrated value T: 1050m^Three (Distribution flow rate integrated value a: 150 m^Three) + (Integrated value of water flow rate
A: 750m^Three) = 900m^ThreeSuppose This
In the case of, the integrated value A of the water supply flow rate is
00m^Three) + (Distribution flow rate integrated value c: 450 m^Three) = 75
0m^ThreeI assume that. The comparison result is 1050
m^Three> 900m^ThreeAnd 1050m^3-900 m^Three=
150m^ThreeSince there is a flow rate difference of
Is judged to have some abnormality in the distribution reservoir 7A.
Be done.

In this case, since the integrated value of the water supply flow rate is larger, it is possible that an overflow occurs, and therefore there is a high possibility that the water level gauge is out of order.

In the judgment process on this flow chart, the judgment criterion of whether or not they substantially agree with each other allows the operator to change the setting, and by changing the set value when the conditions such as summer and winter are different, the abnormality is detected. The accuracy of can be improved.

As described above, even if the water level signal is apparently normal, if the water level change does not appear due to the occurrence of a failure in the electric system, this is immediately detected, and an unexpected overflow such as an overflow of the reservoir or a water cutoff is detected. The state of can be prevented.

As described above, in the above embodiment, the integrated value T of the water supply flow rate per day is approximately the sum of the integrated values of the distribution flow rate, that is, the integrated value of the distribution flow rate a + the integrated value of the distribution flow rate b + the integrated value of the distribution flow rate c. Paying attention to the coincidence, the integrated value T of the water supply flow rate is compared with the integrated value of the total distribution water flow rate, and when the comparison result is different, it is judged that an abnormality has occurred somewhere.
The abnormality is detected.

That is, first, it is determined in processing step S103 (overall determination means) whether an abnormality has occurred in the entire equipment, and if there is an abnormality, in which processing step S104 to S110 (wherein the abnormality has occurred). Judgment is made for each pond and the abnormal location is specified. However, the overall determination means is not always necessary, and the processing may be immediately performed by each pond determination means by omitting it.

The timing of this comparison is performed every hour as shown in FIG. 5, but the flow rate integrated value for the past n hours is also calculated every hour.

The values of the past n hours can be set and changed so that the operator can adjust how many past hours the integrated values are compared to make the optimum determination.

The cycle of real-time failure judgment is 1
Although the time is usually, it is possible to speed up the past flow rate integrated value depending on the number of data to be stored and the cycle.

Naturally, the same treatment method can be applied to a system other than the water supply system shown in FIG. Although there are various types of water level gauges, it is possible to make the same failure determination for all water level gauges used for the same purpose, for example, an electrode type water level gauge and a float type water level gauge.

Further, in the present embodiment, the description has been made under the condition that the flowmeter is normal, but the balance of the integrated value of the flowrate does not match even when the water level gauge is normal and the flowmeter becomes abnormal. , The abnormality can be detected by the same method. According to this method, the abnormality detection accuracy can be improved without installing two water level gauges.

FIG. 6 shows a system configuration of another embodiment, which has a system configuration in which an integrated monitoring system 18 for monitoring and controlling other water supply systems is added to the embodiment shown in FIG. This comprehensive monitoring system 18 has a function equivalent to that of the central monitoring system 11, collects information from other water supply systems 19 by using the communication line 10 such as the NTT circuit, and separates each water supply system nationwide. The monitoring is performed in the same manner as the function of the central monitoring system 11.

Therefore, it becomes possible to deal with the absence of operators of the respective water supply systems, unmanned response, and backup support when the central monitoring system 11 fails.

Further, since the comprehensive monitoring system 18 collects and stores information on the national flow rate and the water level signal, it supports the flow rate calculation, the flow balance, the water level monitoring, and the response in the event of an abnormality across each water supply system. -It will be possible to provide services to each local government.

[0068]

According to the present invention, an abnormality in an apparently normal water level range of a water level gauge in a distribution pond can be accurately detected by the flow balance of each pond, and the abnormal portion can be specified. It is possible to prevent problems such as overflow of the reservoir and water interruption.

[Brief description of drawings]

FIG. 1 is a system configuration diagram showing an embodiment of a water distribution system according to the present invention.

FIG. 2 is a daily change pattern diagram showing a general time course of water flow rate.

FIG. 3 is a daily change pattern diagram showing a time-dependent transition of a general water supply flow rate.

FIG. 4 is a flowchart showing a processing procedure in the central monitoring system in the embodiment of the present invention.

FIG. 5 is an explanatory diagram showing the relationship between the comparison timing of the integrated flow rate and the integrated flow rate for the past n hours in the embodiment.

FIG. 6 is a system configuration diagram showing another embodiment of the present invention.

FIG. 7 is an explanatory diagram showing a relationship between a water level signal of a reservoir water level gauge and a control operation.

[Explanation of symbols]

4 water purification plant 5,12A, 12B water pump 6 Water flow meter 7A, 7B, 7C Reservoir 8A, 8B, 8C Water level gauge 9, 15, 16, 17 terminals 10 NTT line 11 Central monitoring system 13A, 13B, 13C Water flow meter 14A, 14B Water flow meter 18 Comprehensive monitoring system 19 Other water supply systems

Claims (4)

[Claims] 1. A water treatment plant and a plurality of reservoirs configured in multiple stages. The first stage reservoir receives water from a water treatment plant by a water pump, and the reservoirs other than the last stage respectively have their own reservoirs. It has a water pump that sends water to the next stage distribution reservoir,
Each distribution reservoir is a distribution system equipped with water distribution equipment for customers, and is installed in the water treatment plant and distribution reservoirs other than the final stage, and a flow meter for measuring the flow rate of the water to the distribution reservoir on the latter stage side, A water level meter for measuring the water level of each pond and a water flow meter for measuring the water flow rate of each pond, and the water level of each water pond are input, and the water level of the corresponding water pond is adjusted according to the water level of the corresponding water pond. The water supply control means that controls the operation of the water supply pump located on the upstream side, and the total value of the water supply flow rate of the water supply pump located on the upstream side and the water supply flow rate to the next stage and its own water supply flow rate for each distribution reservoir at regular intervals. The water distribution system is characterized by comprising: (1) each of which is compared with each other, and when the difference is out of a predetermined range, it is determined that the corresponding water distribution reservoir has an abnormality. 2. A water treatment plant and a plurality of water reservoirs configured in multiple stages, the first stage reservoir receives water from the water treatment plant by a water pump, and the reservoirs other than the last stage each have their own reservoirs. It has a water pump that sends water to the next stage distribution reservoir,
Each distribution reservoir is a distribution system equipped with water distribution equipment to consumers, and is installed in the water treatment plant and distribution reservoirs other than the final stage, and a water flow meter for detecting the water flow rate to the corresponding distribution reservoir, A water level meter installed in each reservoir to detect the water level of each reservoir and a water flow meter to measure the water flow rate of each reservoir, and the water level of each reservoir should be input, and the preceding stage of the reservoir should be entered according to the water level of the corresponding reservoir. When the water supply control means for controlling the operation of the water supply pump located in the above is compared with the total value of the water flow rate from the water treatment plant and the water flow rate from each reservoir at regular intervals, and the difference is outside the specified range Compares the total flow rate of the water pump located in the preceding stage with the total flow rate of the water pump located in the preceding stage and the total value of the amount of water sent to the next stage and its own distribution flow rate for each distribution reservoir, for each distribution reservoir. And the difference is outside the specified range Water distribution system comprising: the respective pond each determination means for determining that abnormality occurs in the corresponding distribution reservoir, the. 3. The values measured by each measuring device provided at the water purification plant and each distribution reservoir are transmitted from each terminal provided at the water purification plant and each distribution reservoir to the central monitoring system through a communication line, and the central monitoring system 3. The water distribution system according to claim 1, wherein the water distribution system is subjected to integration and determination processing. 4. An integrated monitoring system having a monitoring function equivalent to that of a central monitoring system, capable of exchanging information from other water system terminals, and capable of executing monitoring control processing instead of the central monitoring system. The water distribution system according to claim 3, wherein the water distribution system is connected to a line.