JP2017020237A - Water leakage measure support device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a support device that, when water leakage that can result in damage has occurred, is capable of early detecting the water leakage to make it possible to plan an efficient water leakage measure.SOLUTION: A water leakage measure support device comprises a storage unit and a planning unit. The storage unit stores periodic survey period information, information on a periodic survey of a water distribution pipe network installed in a water leakage occurrence area, an area in which occurrence of water leakage may be detected. The planning unit detects a water leakage occurrence area in which water leakage has occurred, and an amount of water leakage; on the basis of periodic survey period information on the water leakage occurrence area and the detected amount of water leakage, calculates the amount of water leakage that occurs until the next periodic survey and an increase rate of the amount of water leakage that occurs until the next periodic survey; and, when the increase rate is equal to or larger than a predetermined value, plans an emergency survey by the next periodic survey.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a water leakage countermeasure support device for planning countermeasures against water leakage occurring in a water distribution pipe network.

  In general, water leaks of various sizes occur in the water distribution pipe network of waterworks due to breakage of pipes, corrosion, deterioration of the packing at the connecting portion, and the like. There are two types of leaks: leaks that appear on the ground and underground leaks that flow underground. It is easy to find groundwater leakage and identify the location of leakage, but underground leakage is not obvious. It is necessary to repair.

  The following technologies have been published as technologies for efficiently conducting periodic surveys of underground leakage. For example, in the technology described in Non-Patent Document 1, the distribution flow rate (night minimum flow rate) in the midnight time zone in a distribution area (DMA, District Metered Area) capable of measuring the distribution flow rate is measured every day. For example, as shown in FIG. 2, the nighttime minimum flow rate becomes the minimum immediately after the DMA periodic water leakage survey, but thereafter gradually increases with an increase in underground water leakage. In the technique described in Non-Patent Document 1, the nighttime minimum flow rate is regarded as the sum of nighttime demand and underground leakage, and the amount of water loss due to underground leakage since the previous periodic leakage survey (the amount of leakage loss indicated by the shaded area in Fig. 2) X Periodic water leakage investigation period (for example, every 3 years) is determined so that the water leakage investigation cost for the entire DMA is equal to the DMA.

"Fantozzi M. and Lambert A. (2005). Recent advances in calculating economic intervention frequency for active leakage control, and implications for calculation of economic leakage levels, IWA International Conference on Water Economics, Statistics, and Finance, Rethymno, Greece, 8 -10 July 2005 "

  In general, underground leaks are less likely to cause damage such as road collapses and flooding due to the small amount of leaks, but growing underground leaks that are gradually expanding can lead to major damage. Therefore, it is necessary to investigate and take measures for water leakage as soon as possible. However, the technique described in Non-Patent Document 1 does not consider a temporary survey for water leakage that may cause damage. Therefore, when water leakage that could lead to damage occurred, it was not possible to detect the water leakage at an early stage and take effective measures.

  The disclosed water leakage countermeasure support device includes a storage unit for storing periodic survey time information, which is information related to the periodic survey of the water distribution network installed in the water leakage occurrence area, which is the area where the occurrence of water leakage is detected, and water leakage occurs. Detecting the water leakage occurrence area and the amount of water leakage, and the amount of water leakage occurring until the next periodic survey based on the information on the periodical survey timing of the water leakage occurrence area and the detected water leakage amount, and occurring until the next periodic survey The rate of increase in the amount of leaked water is calculated, and when the rate of increase is equal to or greater than a predetermined value, a planning unit is provided for planning a temporary survey until the next periodic survey.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to detect a water leak early and to plan an efficient water leak countermeasure.

Schematic of the whole structure of a water leak countermeasure support system. An example of the relationship between the periodic water leakage survey and the nighttime minimum flow rate. An example of a pipeline information management table. An example of a node information management table. An example of dividing the water distribution network into sub-areas. An example of a subarea management table. The flowchart which shows the process which performs generation | occurrence | production detection of water leakage, and estimation of generation | occurrence | production area and amount of water leakage. An example of the change of the distribution data and the measurement data of each pressure when a water leak occurs. The flowchart which shows the process which performs determination and a presentation of underground water leakage at the time of water leak generation | occurrence | production detection. An example of an underground leakage management table. An example of display of information on underground leakage detected and detected in each sub-area. The flowchart which shows the process which draws up and presents the water leakage investigation plan of a subarea unit. The flowchart which shows the process which draws up and presents an annual leak investigation plan. An example of a regular water leak investigation information management table.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiment described below.

  FIG. 1 shows a schematic diagram of the overall configuration of a water leakage countermeasure support system 100 including a water leakage countermeasure support apparatus 101, a water distribution device such as a pump 111 and a valve 112, a water distribution pipe network 133, a measuring instrument, a network 118, and the like.

  Water in the distribution reservoir 110 is distributed to consumers through a distribution pipe network 133 by a distribution device such as a pump 111 or a valve 112. The water distribution pipe network 113 includes a pipe line 114 and a node 115. Here, the node 115 indicates branching / merging / connection / termination of the pipeline. A water supply pipe for supplying water to each customer branches from the pipe 114 (not shown). On the distribution pipe network 113, a pressure gauge 116 for measuring the pressure of several nodes 115 and the discharge pressure of the pump 111, and a flow meter 117 for measuring the amount of water delivered from the distribution reservoir 110 are installed. It measures the pressure and flow rate at each point. The water leakage countermeasure support device 101 is connected to the pump 111, the pressure gauge 116, and the flow meter 117 via the network 118. Since there are various types of water leaks in the water distribution network 133 due to pipe breakage, corrosion, and deterioration of the packings of the connecting parts, water leakage surveys using sound bars etc. are performed regularly (eg every 3 years). The underground leak is being discovered and repaired.

  The water leakage countermeasure support device 101 is a general computer system including a CPU, a storage device (RAM, hard disk, flash memory, etc.), an input unit 120 (keyboard, mouse, etc.), and a display unit 121 (display, printer, etc.). is there. The storage device stores a data registration unit 122, a data collection unit 123, a water leakage estimation unit 124, an underground water leakage determination unit 125, and a water leakage investigation planning unit 126 as programs, and the CPU executes these programs. Further, the storage device stores the pipe line information management table 140, the node information management table 141, the subarea management table 142, the measurement data management table 143, the underground water leakage management table 144, and the periodic water leakage investigation information management table 145 as data. Therefore, it can be used when the above program is executed.

  The data registration unit 122 is a program that registers information related to the pipe network, underground water leakage, water leakage investigation plan, and the like input from the input unit 120 in a predetermined table. The data collection unit 123 is a program that collects pressure values and water distribution flow values measured by the pressure gauge 116 and the flow meter 117. The water leakage estimation unit 124 is a program that detects the occurrence of water leakage and estimates the generation area / water leakage amount. The underground water leakage determination unit 125 is a program that determines whether or not the occurrence-detected water leakage is underground water leakage. The water leakage investigation plan drafting unit 126 is a program for drafting temporary and periodic water leakage investigation plans.

  The pipe line information management table 140 is a table for managing information related to the pipe lines 114 constituting the water distribution pipe network 113. The node information management table 141 is a table for managing information regarding each node 115 constituting the water distribution network 113. The sub-area management table 142 is a table for managing information related to a sub-area (water leakage occurrence area) identified as a water leakage occurrence area when the water distribution pipe network 113 is divided into a plurality of areas. The measurement data management table 143 is a table for managing the pressure value and the water flow rate value for each time measured by the pressure gauge 116 and the flow meter 117. The underground water leakage management table 144 is a table for managing information related to underground water leakage existing in each sub-area. The regular water leak investigation management table 145 is a table for managing information related to the regular water leak investigation for the distribution pipe network 113. Here, the sub-area is an area of each small-scale pipe network when the distribution pipe network 113 is divided into a plurality of small-scale pipe networks. As will be described later, the occurrence of water leak when the occurrence of water leak is detected. An area identified as an area.

  In the embodiment of the present invention, by executing the following processes (1) to (6) in the water leakage countermeasure support device 101, an efficient water leakage countermeasure considering the state of underground water leakage can be planned. Become.

(1) Registration of information on the water distribution network (2) Collection of pressure and flow rate measurement values from the water distribution network (3) Detection of water leakage and estimation of the area and amount of water leakage (4) Underground when water leakage is detected Judgment and presentation of water leakage (5) Drafting and presentation of water leakage survey plan in sub-area units considering the state of underground water leakage (6) Regular water leakage survey of the entire distribution pipe network considering the state of underground water leakage and past water leakage investigation results Planning and Presentation of the Plan Hereinafter, a method for realizing the processes (1) to (6) will be described with reference to FIGS.

  First, the process (1) for registering information related to the water distribution pipe network will be described with reference to FIGS. The administrator of the water leakage countermeasure support device 101 uses the input unit 120 to identify the identification information (pipe ID), the pipe length, the pipe diameter, the flow velocity coefficient (constant determined by the pipe material and age), the pipe, The identification information (node ID) of the start point / end point of the pipeline, which is the connection information of the route, is input. The data registration unit 112 registers the input information in the pipeline information management table 140 for each entry of the entered pipelines. FIG. 3 shows an example of the pipeline information management table 140 registered by the data registration unit.

  The administrator of the water leakage countermeasure support apparatus 101 inputs identification information (node ID), altitude, and position information (latitude and longitude) of each node 115 from the input unit 120. The data registration unit 112 registers the input information in the node information management table 140 for each input entry of each node. FIG. 4 shows an example of the node information management table 141 registered by the data registration unit.

  The administrator of the water leakage countermeasure support apparatus 101 inputs the identification information (pressure gauge ID) of each pressure gauge 116 and the node ID of the node 115 where the pressure gauge is installed from the input unit 120. The data registration unit 112 identifies the pressure gauge 116 that is closest to each of the pipeline 114 and the node 115, and has the same pressure gauge 116 as the water distribution pipe network 113 as shown in FIG. 5. The sub-area 501 is divided into the pipeline 114 and the nodes 115. As will be described later, the sub-area 501 is an area identified as a water leakage occurrence area when the occurrence of water leakage is detected in the water distribution pipe network 113. Then, the data registration unit 112 calculates the total extension of all the pipelines 114 included in each subarea 501. Then, for each entry in each subarea, the data registration unit 112 performs subarea management on the identification information (subarea ID) of the subarea 501, the pressure gauge ID included in the subarea 501, and the calculated total pipeline extension. Register in the table 142. Then, the data registration unit 112 registers the subarea ID to which each pipeline 114 and each pipeline 115 belong in the pipeline information management table 140 and the node information management table 141, respectively.

  Then, the administrator of the water leakage countermeasure support device 101 uses the input unit 120 as information on the periodic water leakage survey of the distribution pipe network 113 when the next scheduled water leakage survey scheduled date (for example, every 3 years) and when the periodic water leakage survey is completed. Enter the end date of periodic water leak survey. The data registration unit 112 obtains the nighttime minimum flow rate measured by the flow meter 117 from the measurement data management table 141 described later, and the scheduled leak date for each periodic leak survey is entered for each periodic leak survey entry. The end date and the night minimum flow rate on the end date are registered in the periodic water leakage investigation information management table 145. FIG. 14 shows an example of the periodic water leakage survey information management table 145 registered by the data registration unit.

  And the administrator of the water leakage countermeasure support device 101 inputs the temporary water leakage investigation end date when the temporary water leakage investigation is completed from the input unit 120 when a temporary water leakage investigation of a sub-area 501 unit described later is performed. The data registration unit 112 registers the input information in the subarea management table 142.

  As described above, the data registration unit 122 performs registration processing of information regarding the water distribution pipe network.

  Next, the process (2) for collecting measured values of pressure and flow rate from the water distribution pipe network will be described. The data collection unit 123 collects measured values of pressure and flow rate from each pressure gauge 116 and flow meter 117 via the network 118 at predetermined intervals (for example, every 5 minutes), and manages the collected measurement data as measurement data management. Register in the table 141.

  As described above, the data collection unit 123 performs collection processing of measured values of pressure and flow rate from the water distribution pipe network.

  Next, the process (3) for detecting the occurrence of water leakage and estimating and presenting the area and amount of water leakage will be described with reference to FIGS. There are various leak detection techniques, but in the present embodiment, a technique for detecting leak occurrence using a deviation from the reference pattern of the time series data of the amount of water distribution and pressure is adopted. FIG. 7 is a flowchart illustrating processing for detecting occurrence of water leakage and estimating and presenting the generation area / water leakage amount.

  In step S701, the water leakage estimation unit 124 calculates the average and standard deviation of the water distribution amount and each pressure measurement value registered in the measurement data management table 141 for each time in the past predetermined period, and normal time-series data for 24 hours. The reference pattern is created in advance. The reference pattern may be updated every day to improve accuracy, or a reference pattern for each weather or day of the week may be created.

  In step S <b> 702, each time the latest pressure and flow rate are measured and the data management table 141 is updated by the data collection process (2), the water leakage estimation unit 124 updates the latest water distribution amount and each pressure from the measurement data management table 141. Get the measured value.

  In step S703, the water leakage estimation unit 124 compares the measured value of the water distribution amount with the reference pattern value, and the state in which the measured water amount exceeds the allowable range of the reference pattern value (for example, three times the standard deviation) is a predetermined period. If it continues, the process proceeds to step S704. Otherwise, the process proceeds to step S702.

  In step S <b> 704, the water leakage estimation unit 124 detects the occurrence of water leakage, and estimates the amount of water distribution amount measurement value exceeding the reference pattern value as the water leakage amount. Further, each pressure measurement value at the time when it is determined that water leakage has occurred is compared with each reference pattern value, and the subarea 501 to which the pressure gauge 116 whose pressure measurement value is lower than the reference pattern belongs is defined as a water leakage occurrence area. presume. This is because the pressure measurement value of the pressure gauge 116 closer to the water leakage occurrence point decreases than usual due to the pressure loss accompanying the increase in flow rate due to water leakage. For example, in the example illustrated in FIG. 8, a state in which the water distribution measurement value exceeds the reference pattern occurs at 13:00, and the state has continued for a predetermined time (4 hours in the example of FIG. 8), so it is determined that water leakage has occurred. . The amount of water leakage is estimated to be 1 liter per second from the difference between the measured water distribution amount and the reference pattern value. Further, among the pressure measurement values of the pressure gauges in each sub-area, the pressure measurement value of the sub-area 2 is the lowest than the reference pattern, so that the sub-area 2 is estimated as the water leakage occurrence area.

  By the way, even if there are a plurality of water leaks detected at different times, if they are detected and detected in the same sub-area 501, it is difficult to identify whether they are separate water leaks or the same water leaks. . In this embodiment, as will be described later, it is determined that the same water leakage is growing when a predetermined condition is satisfied, and a water leakage countermeasure is planned.

  As described above, the water leakage estimation unit 124 detects the occurrence of water leakage and performs processing for estimating the generation area and the amount of water leakage. In the present embodiment, as a leakage detection method, a method for detecting leakage occurrence using a deviation from the reference pattern of the time series data of water distribution amount and pressure has been described. A method using a minimum flow rate or a method based on pipe network analysis calculation may be used.

  Next, the process (4) for determining and presenting underground water leakage when detecting the occurrence of water leakage will be described with reference to FIGS. This process is performed when the occurrence of water leakage is detected by the water leakage occurrence detection process (3). FIG. 9 is a flowchart showing a process of determining and presenting underground water leakage when the occurrence of water leakage is detected.

  In step S901, the underground water leakage determination unit 125 compares the water leakage amount estimated by the water leakage occurrence detection process (3) with a predetermined amount (for example, 10 liters per second). The process proceeds to step S902. Otherwise, the process proceeds to step S903.

  In step S902, the underground water leakage determination unit 125 determines that there is a possibility of damage due to the leakage of water because the amount of water leakage is large, and the display unit performs a temporary leakage investigation on the subarea 501 where the water leakage has occurred. 121 is displayed.

  In step S903, the underground water leakage determination unit 125 determines that there is little possibility of damage even if the water leakage is small and the water leaks to the ground, and causes the display unit 121 to leave the water leakage for a predetermined period (for example, 10 days). indicate.

In step S904, the administrator of the water leakage countermeasure support apparatus 101 confirms whether the water leakage has appeared on the ground after the predetermined period has elapsed, and instructs the worker to take countermeasures / repairs if it has appeared on the ground. When it does not appear on the ground, the manager inputs from the input unit 120 that the water leak did not appear on the ground. The underground water leakage determination unit 125 determines the above water leakage as underground water leakage, and for each entry of the above underground water leakage, the underground leakage identification information (leakage ID), the underground leakage occurrence date, the leakage amount, and the subarea where the leakage occurred are Register in the water leakage management table 144. Then, “unmeasured” is registered as the newly registered status of underground leakage. The status will be updated to “Countermeasured” at a later stage when measures and repairs for underground water leakage are completed.
FIG. 10 shows an example of the underground leakage management table 144 registered by the underground leakage determination unit 125.

  In step S905, the underground water leakage determination unit 125 acquires information on unmeasured underground water leakage from the underground water leakage management table 144, and the total water leakage amount for each sub-area 501 and the occurrence detection date of the detected individual water leakage, The amount of water leakage is displayed on the display unit 121. However, individual leaks detected and detected in the same sub-area 501 are not necessarily different leaks, but may be detected when the leak amount of one growing leak increases. There is sex. In FIG. 11, an example of the display of the information regarding the underground water leak detected in each subarea 501 is shown. This makes it possible to grasp at a glance how much underground water leakage exists in each sub-area.

  As described above, the underground water leakage determination unit 125 determines and presents the underground water leakage when the occurrence of water leakage is detected.

  Next, a process (5) for making and presenting a leakage investigation plan for each sub-area in consideration of the state of underground leakage will be described with reference to FIG. This process is performed when it is determined that a new underground leak has occurred in the underground leak determination process (4). FIG. 12 is a flowchart showing a process for making and presenting a water leakage investigation plan in units of subareas.

  In step S1201, the water leakage investigation planning unit 126 refers to the underground water leakage management table 144 and the subarea management table 142, and determines the amount of leakage of all underground water leakage existing in the subarea 501 in which new underground water leakage has occurred. The next scheduled leak inspection date for area 501 is acquired. Then, the amount of water leakage is multiplied by the unit price of water supply (for example, 100 yen / m 3) to calculate the total amount of water leakage A lost by the next scheduled date of scheduled water leakage investigation due to all underground water leakage existing in the sub-area 501.

  In step S1202, the water leakage investigation planning unit 126 obtains the total extension of the subarea 501 from the subarea management table 142, and multiplies it by the water leakage investigation unit price (for example, 100,000 yen / km) to calculate the water leakage investigation cost for the subarea 501. B is calculated.

  In step S1203, the water leakage investigation planning unit 126 compares the total water leakage loss A with the water leakage investigation cost B. If the total water leakage loss A is equal to or greater than the water leakage investigation cost B, the flow proceeds to step S1204. Otherwise, the process proceeds to step S1209.

In step S <b> 1204, the water leakage investigation plan drafting unit 126 drafts a water leakage investigation plan so as to conduct a temporary water leakage investigation in the sub-area 501 at the present time or in the near future, and displays it on the display unit 121. That is, the planning unit (leakage investigation planning unit 126) calculates the amount of loss lost until the next regular leakage survey in the leakage occurrence area (subarea 501), and the loss amount is calculated in the leakage occurrence area (subarea 501). A plan is made to conduct a temporary survey of the water leakage occurrence area (sub-area 501) when it is higher than the water leakage survey cost.
Extra leakage investigation costs will be incurred due to the temporary leakage investigation, but it is possible to reduce the amount of leakage loss due to underground leakage compared to the case where the leakage investigation is postponed until the regular leakage investigation. Will be able to do.

  However, if the frequency of occurrence of underground leakage in the sub-area 501 is high, even if it is the above case, it is better not to conduct a temporary leakage survey immediately, but to wait for the next underground leakage and perform a temporary leakage survey collectively. It may be economically advantageous. Therefore, in the case of an area where the occurrence of underground water leakage is high, the following processes of S1205 to S1208 may be added.

  In step S1205, the water leakage investigation planning unit 126 calculates the total water leakage loss B lost by all the underground water leakage existing in the sub area 501 when the temporary water leakage investigation is not performed for a certain period in the sub area 501. The predetermined period T1 is calculated when the water leakage investigation cost B of the sub-area 501 becomes equal.

  In step S1206, the water leakage investigation planning unit 126 refers to the underground water leakage management table 144 and calculates an average occurrence interval T2 of past underground water leakage in the subarea 501. Then, the fixed period T1 is compared with the average occurrence interval T2, and if the fixed period T1 is equal to or greater than the average occurrence interval T2, the process proceeds to step S1208. Otherwise, the process proceeds to step S1207.

  In step S <b> 1207, the water leakage investigation plan drafting unit 126 drafts a water leakage investigation plan so as to conduct a temporary water leakage investigation in the sub-area 501 at the present time or in the near future, and displays it on the display unit 121. Since there is a low possibility that the next underground leakage will continue within the above-mentioned fixed period T1, it is possible to reduce costs by investigating and taking measures for each underground leakage individually than investigating and taking measures at once. Therefore, it becomes possible to take economical measures against water leakage.

In step S1208, the water leakage investigation planning unit 126 devises a water leakage investigation plan so that a temporary water leakage investigation is performed in the sub-area 501 when underground leakage occurs after the lapse of the predetermined period T1 or before, and the display unit 121 is displayed.
Since there is a high possibility that the next underground leak will continue within the above-mentioned fixed period T1, it is better to wait for the next underground leak to occur before investigating and taking measures for the underground leak in the sub-area 501. Costs can be reduced rather than investigating and taking measures individually, and economical water leakage measures can be taken.

  In step S1209, the water leakage investigation planning unit 126 has an underground leakage in the sub-area 501, but does not perform a temporary leakage investigation in the sub-area 501, and the water leakage is delayed until the next periodic leakage investigation. An investigation plan is drawn up and displayed on the display unit 121. Leakage loss due to underground water leakage will occur, but it will be possible to reduce the cost of water leakage investigation compared to conducting a temporary water leakage investigation, so it will be possible to take economical water leakage countermeasures.

  However, if the underground leakage existing in the sub-area 501 is a growing leakage, the amount of leakage may gradually increase, leading to significant damage. Therefore, even if the water leakage survey planning unit 126 plans not to conduct a temporary water leakage survey in the sub-area 501 from the above economic viewpoint, the underground water leakage existing in the sub-area 501 satisfies the following conditions: It is determined that there is a possibility that underground water leakage has grown, and a water leakage investigation plan is prepared so as to conduct a temporary water leakage investigation in the sub-area 501 from the viewpoint of damage risk reduction, and is displayed on the display unit 121. The planning unit (leakage investigation plan planning unit 126) is a temporary member of the leakage occurrence area (subarea 501) when the occurrence of a plurality of leakages in the leakage occurrence area (subarea 501) is detected a predetermined number of times or more within a predetermined period. Plan to conduct an investigation. In addition, when the planning section (leakage investigation planning section 126) makes a plan to conduct a temporary investigation of the leakage occurrence area (subarea 501), it is lost in the leakage occurrence area (subarea 501) for a certain period of time. Calculate a certain period when the amount of loss due to water leakage is equal to the leakage investigation cost of the leakage occurrence area, and postpone the temporary investigation of the leakage occurrence area when the certain period is longer than the average occurrence interval of leakage in the leakage occurrence area.

  (Condition 1) The increase rate of the total amount of underground leakage existing in the sub-area 501 is a predetermined value or more.

(Condition 2) A plurality of underground leaks were continuously detected in the sub-area 501 within a predetermined period (for example, one week).
This makes it possible to take effective measures in consideration of the possibility of underground leakage growth.

  After the completion of the temporary leakage survey for the sub-area 501, the administrator of the water leakage countermeasure support apparatus 101 inputs the sub-area ID of the sub-area 501 for which the temporary leakage survey has been completed from the input unit 120. The data registration unit 122 refers to the subarea management table 142 and updates the water leak investigation date of the subarea 501 to the latest date. Also, with reference to the underground water leakage management table 144, the status of all water leakages existing in the sub-area 501 is updated to “measured”.

  As described above, the leakage investigation plan drafting unit 126 drafts and presents a leakage investigation plan for each sub-area in consideration of the state of underground leakage.

  Next, a process (6) for making and presenting a periodic water leakage survey plan for the entire distribution pipe network in consideration of the state of underground water leakage and past water leakage investigation results will be described with reference to FIG. This process is carried out when conducting a regular water leakage survey of the entire distribution pipe network 113. FIG. 13 is a flowchart showing a process for making and presenting a periodic water leakage investigation plan.

  In step S1301, the water leakage investigation plan drafting unit 126 acquires the scheduled water leakage investigation scheduled date of the distribution pipe network 113 from the periodic water leakage investigation information management table 145, and starts making a periodic water leakage investigation plan several days before. The water leak investigation planning unit 126 calculates the total water leak amount of each sub area 501 from the sub area management table 142 and acquires the temporary water leak investigation end date of each sub area 501 from the underground water leak management table 144. Then, priorities are assigned to the sub-areas 501, and a water leakage investigation plan is created so that a periodic water leakage investigation is performed in order from the sub-area 501 with the highest priority, and is displayed on the display unit 121. Prioritization of the sub-areas 501 is performed as follows.

(Priority 1) Subarea with large total water leakage (Priority 2) Subarea where no underground leakage has been found but temporary leakage survey has not been performed (Priority 3) Old subarea where the temporary leakage survey was conducted Step In S1302, the water leak investigator of the water distribution pipe network 113 conducts a regular water leak survey for each sub-area 501 over a predetermined period in accordance with the above priority order. As a result, it is possible to perform an effective water leakage countermeasure in consideration of the state of underground water leakage and past water leakage investigation results. Each time the periodic water leakage survey for the sub area 501 is completed, the process proceeds to step S1303. The periodic water leakage survey is completed when the water leakage surveys of all the sub-areas 501 are completed.

  In step S1303, the water leak investigation planning unit 126 obtains the daily minimum daily flow F1 from the measurement data management table 141 after the start of the regular water leak investigation, and ends the previous periodic water leak investigation from the periodic water leak investigation information management table 145. The night minimum flow rate F2 of the day is acquired. Then, the two minimum night flow rates F1 and F2 are compared. If F1 is equal to or smaller than the predetermined error range of F2 (F1 ≦ F2 + α, α is a positive number indicating the predetermined error range), the process proceeds to step S1304. If not, the process proceeds to step S1302, and the periodic water leakage survey is continued.

  In step S1304, the water leakage investigation planning unit 126 determines that the nighttime minimum flow rate has decreased to the level after the previous periodic water leakage investigation and the underground water leakage has decreased to an allowable range, and the display unit 121 finishes the periodic water leakage investigation. To display. As a result, it is not necessary to investigate the entire area of the water distribution pipe network 113, and an economical water leakage countermeasure can be taken.

  As described above, the regular leakage survey plan for the entire distribution pipe network and the presentation process are performed in consideration of the state of underground leakage and past leakage survey results. In other words, it further includes a measuring unit (data collecting unit 123) that measures the nighttime minimum flow rate in the water distribution pipe network, and a display unit 121, and the planning unit (leakage investigation planning unit 126) is arranged in units of water leakage occurrence areas. A plan is made so that a regular survey of the water pipe network is performed, and the display unit 121 displays that the regular survey is ended when the measured nighttime minimum flow rate is lowered to the level after the previous regular survey. In addition, the planning section (leakage investigation planning section 126), when planning a periodic investigation plan for each leakage occurrence area, a leakage occurrence area in which underground leakage exists, a leakage occurrence area with a large total leakage, or a leakage investigation. Plan to conduct periodic surveys preferentially from the area where water leakage occurred at the time when the accident occurred.

  As described above, according to the embodiment of the present invention, it is possible to detect a water leak that may lead to a large water leak at an early stage and to plan an effective water leak countermeasure.

DESCRIPTION OF SYMBOLS 100 ... Water leak countermeasure support system, 101 ... Water leak countermeasure support apparatus, 110 ... Water distribution place, 111 ... Pump, 112 ... Valve, 113 ... Water distribution pipe network, 114 ... Pipe line, 115 ... Node, 116 ... Pressure gauge, 117 ... Flow rate Total 118, network 120, input unit 121, display unit 122, data registration unit, 123 data collection unit, 124 leak estimation unit, 125 underground leakage determination unit, 126 leak survey planning unit, 140 ... pipeline information management table, 141 ... node information management table, 142 ... subarea management table, 143 ... measurement data management table, 144 ... underground water leakage management table, 145 ... periodic water leakage investigation information management table.

Claims (12)

A storage unit for storing periodic survey time information, which is information related to a periodic survey of a water distribution pipe network installed in a water leak occurrence area, which is an area where occurrence of water leak is detected,
Detecting the water leakage occurrence area and the amount of water leakage, and the amount of water leakage occurring until the next periodic survey based on the information on the periodical inspection time of the water leakage occurrence area and the detected water leakage amount, and the next time And calculating a rate of increase in the amount of leakage occurring before the periodic survey, and, if the rate of increase is greater than or equal to a predetermined value, a planning unit for planning a temporary survey until the next periodic survey. Water leakage countermeasure support device. The planning department
Planning to conduct a temporary investigation of the water leakage occurrence area when the occurrence of a plurality of water leakages is detected a predetermined number of times or more within a predetermined period in the water leakage occurrence area,
The water leakage countermeasure support device according to claim 1. The planning department
Calculate the amount of loss lost until the next periodic survey in the leakage occurrence area, and plan to conduct a temporary survey of the leakage occurrence area when the loss amount is higher than the leakage investigation cost of the leakage occurrence area. The water leakage countermeasure support device according to claim 1. The planning department
When planning to conduct an extraordinary investigation of the leak occurrence area, calculate a fixed period when the amount of loss due to leak in the leak occurrence area during the fixed period is equal to the leak investigation cost of the leak occurrence area. , When the fixed period is larger than the average occurrence interval of leakage in the leakage occurrence area, postponement of the temporary investigation of the leakage occurrence area,
The water leakage countermeasure support device according to claim 3. A measurement unit for measuring the nighttime minimum flow rate in the water pipe network, and a display unit,
The planning section makes a plan to conduct a periodic survey of the water distribution pipe network in units of the water leakage occurrence area,
The water leakage countermeasure support device according to claim 1, wherein the display unit displays the periodic survey to be terminated when the measured nighttime minimum flow rate is lowered to a level after the previous regular survey. When planning the periodical survey for each leakage occurrence area, the planning department will develop a leakage occurrence area where there is underground leakage, a leakage occurrence area with a large total leakage, or an old leakage at the time when the leakage investigation was conducted. The water leakage countermeasure support device according to claim 5, wherein the water leakage countermeasure support device is designed so that a periodic survey is preferentially performed from an occurrence area. In the water leakage countermeasure support method in which the water leakage countermeasure support device plans water leakage countermeasures,
A step of storing a periodic survey time information that is information related to a periodic survey of a water distribution pipe network installed in a water leakage occurrence area, which is an area where the occurrence of water leakage is detected in advance,
The planning department detects the leakage occurrence area and the amount of water leakage, and the leakage that occurs until the next periodic survey based on the information on the periodical investigation timing of the leakage occurrence area and the detected amount of leakage. And calculating a rate of increase in the amount of water leakage occurring before the next periodic survey, and, if the increase rate is equal to or greater than a predetermined value, planning a temporary survey before the next periodic survey. Water leakage countermeasure support method characterized by The planning unit plans to conduct a temporary survey of the water leakage occurrence area when occurrence of a plurality of water leakages is detected more than a predetermined number of times within a predetermined period in the water leakage occurrence area,
The water leakage countermeasure support method according to claim 7. The planning unit calculates a loss amount to be lost until the next periodic survey in the leakage occurrence area, and performs a temporary survey of the leakage occurrence area when the loss amount is higher than the leakage investigation cost of the leakage occurrence area. The water leakage countermeasure support method according to claim 7, wherein planning is performed. The planning unit, when planning to conduct a temporary survey of the leakage occurrence area, when the amount of loss due to leakage lost in a certain period of time in the leakage occurrence area is equal to the leakage investigation cost of the leakage occurrence area Calculating a certain period of time, and deferring the temporary investigation of the water leakage occurrence area when the certain period is larger than the average occurrence interval of water leakage in the water leakage occurrence area,
The water leakage countermeasure support method according to claim 9. The planning section makes a plan to conduct a periodic survey of the water distribution pipe network in units of the water leakage occurrence area,
A measuring unit measuring a nighttime minimum flow rate in the distribution pipe network; and
The water leakage according to claim 7, further comprising: a step of displaying the end of the periodic survey when the measured nighttime minimum flow rate has decreased to a level after the previous periodic survey. Countermeasure support method. When planning the periodical survey for each leakage occurrence area, the planning department will develop a leakage occurrence area where there is underground leakage, a leakage occurrence area with a large total leakage, or an old leakage at the time when the leakage investigation was conducted. The method for supporting countermeasures against water leakage according to claim 11, wherein planning is performed so that a periodic survey is preferentially performed from an occurrence area.

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