JP6181301B2 - Water leakage countermeasure support device and method - Google Patents

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. These leaks not only waste valuable water resources due to delays in detection, but also cause damage such as road collapses and inundation, so it is desirable to detect them as early as possible and take effective measures.

  The following technologies are disclosed as technologies for detecting leakage in real time and planning countermeasures. For example, in Patent Document 1, the position and amount of water leakage occurring in the water distribution pipe network are estimated using measured values from a flow meter and a pressure gauge installed in the water distribution pipe network. In addition, when the amount of water leakage increases rapidly, a warning is issued and the amount of water leakage is effectively reduced by closing the valve installed in the pipeline that branches from the main line to the water distribution block (block where water leakage has increased rapidly). .

JP 2013-178207 A

  However, in the technology described in Patent Document 1, there is a possibility that the amount of damage due to water breakage that occurs when the water supply is stopped when the valve is closed exceeds the amount of damage when water leakage damage occurs without closing the valve. Since it cannot be determined whether the damage amount with or without the valve closing will be small, it is difficult to implement appropriate water leakage countermeasures.

  The water leakage countermeasure support device stores in advance the water leakage damage amount storage unit that stores in advance the amount of water leakage damage when water leaks from the pipes in the distribution pipe network, and the water leakage damage amount in the event that the pipe line is shut down. Water leakage damage in the distribution pipe network based on the information on the pipeline where the water leakage occurs and the leakage damage value stored in the leakage damage storage section when water leakage occurs in the water loss damage storage section and the distribution pipe network From the information on the amount of water leakage damage estimation that estimates the amount, and the information on the pipeline where water breakage occurs in the event of a water outage in the water distribution network, and the amount of water damage stored in the water loss damage storage unit, A water damage estimation unit that estimates the amount of water damage caused by the water leakage, and a water leakage countermeasure planning unit that plans measures against water leakage based on the estimated amount of water leakage damage and the estimated amount of water damage.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to implement the water leakage countermeasure in consideration of the damage accompanying water leakage and the cost accompanying a water leakage countermeasure.

Schematic of the whole structure of a water leak countermeasure support system. An example of a pipeline information management table. An example of a node information management table. An example of a customer information management table. An example of a water leakage damage amount management table. An example of a water outage management table. An example of a water outage damage amount management table. An example of the damage amount management table according to pipeline. The flowchart which shows the process which estimates and shows the position and amount of water leakage which generate | occur | produced in the water distribution pipe network. An example of the display screen of a water leak estimation result. The flowchart which shows the process which develops and shows the decompression water distribution plan at the time of water leak generation | occurrence | production. An example of the display screen of the decompression water distribution plan formulation result. An example of the division | segmentation of the water leak estimation area by a mesh. The flowchart which shows the process which formulates and presents the water leakage investigation plan at the time of water leakage occurrence. An example of a screen for displaying the results of a water leakage investigation plan. The flowchart which shows the process which develops and presents the valve operation personnel deployment plan at the time of water leak generation | occurrence | production. An example of a display screen of a valve operation personnel deployment plan formulation result. The flowchart which shows the process which develops and presents the valve opening / closing plan at the time of water leak occurrence. Explanatory drawing of the water supply to the water stop area which arises by valve closing, and the water stop area by valve opening etc. An example of the display screen of the valve opening / closing plan formulation result.

  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 an 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 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. The valve 112 installed on the pipe line 114 is also regarded as one of the nodes for convenience. A water supply pipe for supplying water to each customer branches from the pipe 114 (not shown). On the water distribution pipe network 113, a pressure gauge 116 that measures the pressure of several nodes 115 and a flow meter 117 that measures several pipe flow rates are installed. The pump 111 is also provided with a pressure gauge 116 and a flow meter 117 (not shown), and measures the amount of water distribution and the distribution pressure from the distribution reservoir 110 to the distribution pipe network 113. 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.

  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 includes a data registration unit 122, a data collection unit 123, a water leakage estimation unit 124, a water leakage damage estimation unit 125, a water leakage damage estimation unit 126, a pipe network analysis calculation unit 127, a decompression water distribution planning unit 128, and a water leakage investigation plan. The formulating unit 129, the personnel deployment plan formulating unit 130, and the valve opening / closing plan formulating unit 131 are stored as programs, and the CPU executes these programs. In addition, the storage device includes a pipe line information management table 140, a node information management table 141, a customer information management table 142, a water leakage damage amount management table 143, a water breakage day management table 144, a water breakage damage amount management table 145, and a damage by pipe line. A forehead management table 146 and a measurement data management table 147 are stored as data, and can be used when the program is executed.

  The data registration unit 122 is a program for registering information regarding pipes, customers, water leakage damage amounts, 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 flow values measured by the pressure gauge 116 and the flow meter 117. The water leakage estimation unit 124 is a program that estimates the position (area) of water leakage occurring on the water distribution pipe network 113 and the amount of water leakage. The water leakage damage amount estimation unit 125 is a program that estimates the amount of damage due to water leakage caused by water leakage. The water outage damage amount estimation unit 126 is a program that estimates the amount of water outage damage when water outage damage occurs in a consumer. The pipe network analysis calculation unit 127 is a program that performs pipe network analysis calculation (estimated calculation of each pipe flow rate and each node pressure) on the water distribution pipe network 113. The depressurized water distribution planning unit 128 is a program for drafting a depressurized water distribution plan as a countermeasure for water leakage. The water leakage investigation plan formulation unit 129 is a program for drafting a water leakage investigation plan for specifying the position of water leakage that has not appeared on the ground. The personnel deployment plan formulation unit 130 is a program that formulates a deployment plan for valve operation personnel for valve closing. The valve opening / closing plan formulation unit 131 is a program for drafting a valve opening / closing plan such as a valve to be opened / closed and a valve closing order.

  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 that manages information related to the presence or absence of each node 115 and valve 112 constituting the water distribution pipe network 113. The customer information management table 142 is a table for managing information on each customer who receives water supply via the water distribution pipe network 113. The leakage damage amount management table 143 is a table that manages information necessary for calculating the leakage damage amount for each pipe diameter and customer attribute. The water cutoff days management table 144 is a table for managing the average water cutoff days for each pipe diameter. The water outage damage management table 145 is a table for managing information necessary for calculating the water outage damage by customer attribute. The damage management table for each pipeline 146 is a table for managing information on the leakage damage amount and the water breakage damage amount for each pipeline. The measurement data management table 147 is a table for managing the pressure value and the flow rate value for each time measured by the pressure gauge 116 and the flow meter 117.

  In the embodiment of the present invention, by executing the following processes (1) to (7) in the water leakage countermeasure support apparatus 101, an efficient water leakage countermeasure in consideration of damage due to water leakage and costs associated with water leakage countermeasures. Can be planned.

(1) Registration of information on water distribution pipe networks, customers, water leakage damage and water damage (Figures 2-8)
(2) Collection of measured values of pressure and flow rate from the water distribution network (3) Estimation and presentation of the position and amount of water leakage occurring in the water distribution network (Fig. 9)
(4) Formulation and presentation of decompression water distribution plan at the time of leakage (Figure 11)
(5) Formulation and presentation of a water leak investigation plan when a water leak occurs (Figure 14)
(6) Formulation and presentation of valve operation personnel deployment plan in case of water leakage (Figure 16)
(7) Formulation and presentation of valve opening / closing plan when water leakage occurs (Figs. 17 and 18)
That is, the water leakage damage amount storage unit (water leakage damage amount management table 143) of the water leakage countermeasure support device 101 stores in advance the water leakage damage amount when water leaks from a pipe line in the distribution pipe network. The water breakage damage storage unit (water breakage damage management table 145) stores in advance a water breakage damage amount when the pipe line is cut off. When the occurrence of water leakage is detected in the distribution pipe network, the water leakage damage amount estimation unit 125 uses the information on the pipeline where the water leakage has occurred and the water leakage damage amount stored in the water leakage damage storage unit to Estimate the amount. The water outage damage estimation unit 126 calculates the amount of water outage damage due to water outage from the information of the pipeline where the water outage occurs when the water outage occurs in the distribution pipe network and the amount of water outage damage stored in the water outage damage amount storage unit. presume. The water leakage countermeasure planning section (decompression water distribution plan formulation section 128, water leakage survey plan formulation section 129, personnel deployment plan formulation section 130, valve opening / closing plan formulation section 131) Based on the above, measures for water leakage are planned.
Hereinafter, a method for realizing the processes (1) to (7) will be described with reference to FIGS.

  First, the process (1) for registering information relating to a water distribution pipe network, a customer, water leakage damage and water damage 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. 2 shows an example of the pipeline information management table 140 registered by the data registration unit.

  Then, the administrator of the water leakage countermeasure support apparatus 101 inputs identification information (node ID), altitude, position information (latitude, longitude), and valve presence / absence information 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. 3 shows an example of the node information management table 141 registered by the data registration unit.

  Then, the administrator of the water leakage countermeasure support apparatus 101 inputs the customer name, address, attribute information (housing, commercial facility, industrial facility, etc.) of each customer and the pipeline ID of the connection destination pipeline from the input unit 120. . The data registration unit 112 registers the input information in the customer information management table 142 for each entered customer entry. FIG. 4 shows an example of the customer information management table 142 registered by the data registration unit.

  Then, the administrator of the water leakage countermeasure support device 101 uses the input unit 120 as information necessary for estimating the amount of damage when water leakage occurs from the pipe, and the basic unit of water leakage damage by pipe diameter / customer attribute, Enter the amount of water leakage that is the basis for the occurrence of damage. In the present embodiment, it is assumed that water leakage damage occurs only when water leakage exceeding the above-mentioned reference water leakage amount occurs, and for each customer connected to the water leakage pipe, Assume that damage of the unit amount has occurred. The data registration unit 112 registers the input information in the water leakage damage management table 143. FIG. 5 shows an example of the water leakage damage management table 143 registered by the data registration unit. In the example of FIG. 5, for example, when a water leak of 15.0 m 3 / s occurs from a 450 mm caliber pipe, the amount of water leak damage of one house connected to the water leak pipe is 100,000 yen.

  Then, the administrator of the water leakage countermeasure support apparatus 101 uses the input unit 120 as information necessary for estimating the amount of damage when water damage occurs from the pipeline, as well as the average number of days of water outage by pipe diameter and the water outage by demand family gender. Enter the basic unit of damage amount. In the present embodiment, it is assumed that each customer connected to the water shutoff pipe is damaged every day during the water shutoff period by the amount of the above water shutoff damage basic unit according to the customer attribute. The data registration unit 112 registers the above-mentioned average number of days of water outage by pipe diameter in the water outage day management table 144 and registers the unit of water outage damage by demand family sex in the water outage damage management table 145. FIG. 6 and FIG. 7 show examples of the water outage management table 144 and the water outage damage management table 145 registered by the data registration unit. In the example of FIGS. 6 and 7, for example, when water breakage of a 600 mm diameter pipe occurs, the average water breakage damage of one industrial facility connected to the leak pipe is 100,000 yen (20,000 yen × 5 days). Become.

  Then, the data registration unit 112 calculates the amount of water leakage damage for each pipeline and the amount of water damage for each pipeline as follows based on the information registered in each table.

  The data registration unit 112 acquires all the consumers connected to the pipeline 114 from the customer information management table 142 for each pipeline 114, and attribute information of each customer from the customer information management table 142. The leakage damage amount for each customer is calculated based on the leakage damage basic unit of the pipe diameter / demand family gender in the leakage damage management table 143, and the leakage to all customers connected to the pipeline 114 is calculated. The sum total of the damage amount is calculated, and the amount of water leakage damage when the water leakage damage occurs in the pipeline 114 is calculated. This calculation is repeated for all the pipelines 114, and the amount of water leakage damage for each pipeline is calculated.

  The data registration unit 112 also acquires all consumers connected to the pipeline 114 from the customer information management table 142 for each of the pipelines 114, and the average number of days of water outage for each pipe diameter in the water cutoff days management table 144. And the amount of water damage for each of the above-mentioned nuclear customers based on the amount of water damage for each customer attribute in the water damage management table 145, and the sum of water damage for all customers connected to the pipeline 114 is calculated. Calculate to calculate the amount of water damage caused when the pipeline 114 is water-stopped. This calculation is repeated for all the pipelines 114, and the amount of water damage caused by each pipeline is calculated.

  The data registration unit 112 registers the calculated water leakage damage amount for each pipe line, the water leakage damage amount, and the reference water leakage amount for occurrence of water leakage damage in the pipe line damage amount management table 146. FIG. 8 shows an example of the damage management table 146 for each pipeline registered by the data registration unit.

  Here, the above-mentioned registered water leakage damage amount and water damage damage amount are only a guideline, and may differ from actual conditions depending on the water usage status and business contents of the customer. If the actual amount of water leakage damage and water damage caused when a water leakage accident actually occurs is known, the administrator of the water leakage countermeasure support device 101 can input the amount of water leakage damage and water damage on the pipeline 114 from the input unit 120. Enter. The data registration unit 112 updates the damage amount management table 146 for each pipeline based on the input information.

  As described above, the data registration unit 112 performs processing for registering information related to the water distribution pipe network, consumers, water leakage damage and water breakage damage.

  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, each flow meter 117, and the pump 111 via the network 118 every predetermined period, for example, every 5 minutes, and collects the collected measurement data. Register in the measurement data management table 147.

  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, processing (3) for estimating and presenting the position and amount of water leakage occurring in the water distribution pipe network will be described with reference to FIG. There are various leak estimation techniques, but the technique described in Patent Document 1 is adopted in this embodiment. FIG. 9 is a flowchart showing a process for estimating and presenting the position and amount of water leakage occurring in the water distribution network.

  In step S <b> 901, the water leakage estimation unit 124 performs water leakage estimation every data measurement cycle, that is, after collecting the latest measurement data. As a water leakage parameter, an appropriate amount of water leakage is set at an appropriate position on the distribution pipe network 113.

  In step S902, the pipe network analysis calculation unit 127 performs pipe network analysis calculation on the water distribution pipe network 113 based on the set water leakage parameter. Pipe network analysis calculation means identification information of pipe 114, pipe length, pipe diameter, flow velocity coefficient (varies depending on pipe material and aging), connection information (identification of demand points that are the start point and end point of the pipe) Information), and the identification information of the node 115, the position information, the flow balance equation at the node derived from the tube network model information such as the altitude, and the pressure balance equation at the pipe line, Pressure and flow rate distribution. Since an algorithm for performing pipe network analysis calculation is publicly known, for example, a pipe network analysis calculation tool such as EPANET developed by the United States Environmental Protection Agency has been released to the public. Therefore, detailed description thereof is omitted in this embodiment. The pipe network analysis calculation unit 127 acquires the pipe network model information from the pipe line information management table 140 and the node information management table 141, and the flow rate value, pressure value, and predetermined values on the water pipe network 113 at the current time. The pipe network analysis calculation is performed based on the boundary conditions such as the demand distribution and the set water leakage parameter, and the pressure distribution and the flow distribution on the distribution pipe network 113 are calculated.

  In step S <b> 903, the water leakage estimation unit 124 calculates the measured value at the pressure / flow rate measurement point registered in the measurement data management table 147 and the calculated value of the pressure / flow rate at the same point calculated by the pipe network analysis calculation unit 127. Calculate the residual sum of squares. Then, it is evaluated whether the residual sum of squares has become a predetermined value or less or has converged compared to the previous value. If the residual sum of squares is equal to or greater than the predetermined value and has not converged, the process proceeds to step S904, and if the residual sum is less than the predetermined value or has converged, the process proceeds to step S905.

  In step S904, the water leakage estimation unit 124 corrects the water leakage parameter (water leakage position / amount) so as to reduce the residual sum of squares using an optimization algorithm such as GA (Genetic Algorithm). The process proceeds to step S902. Steps S902, S903, and S904 are repeated until the residual sum of squares is equal to or less than a predetermined value or converges.

In step S905, the water leakage estimation unit 124 determines whether or not water leakage has occurred based on the calculated water leakage parameters (water leakage position / water leakage amount). If the amount of water leakage is equal to or greater than a predetermined amount, it is considered that water has leaked, and it is estimated that water has occurred in any of the pipelines 114 at the water leakage position at that time. The estimated leak location is not a pinpoint (single pipe), but is generally estimated as an area (multiple pipes) that includes a certain error range due to measurement data measurement errors and pipe network model modeling errors. In step S906, when the occurrence of water leakage is estimated, the water leakage damage amount estimation unit 125 calculates an expected value and a maximum value of the water leakage damage amount in the water leakage estimation area. That is, for all the pipelines 114 (the pipelines that may have leaked water) existing in the leakage estimation area, the pipeline diameter and the pipeline length of each pipeline 114 are acquired from the pipeline information management table 140, From the damage management table 146 for each pipeline, obtain the amount of water leakage for each pipeline and the standard amount of leakage that has occurred. For each of the pipes 114, the amount of water leakage damage is calculated assuming that water leakage damage occurs only when the estimated amount of water leakage exceeds the reference water leakage amount. The maximum value of the water leakage damage amount of each pipe 114 is set as the maximum value of the water leakage damage amount in the water leakage estimation area. The weighted average of each leakage damage amount according to the length of each pipeline 114 is set as the expected value of the leakage damage amount in the leakage estimation area.

  When the occurrence of water leakage is estimated in step S907, the information presentation unit 132 displays the estimated water leakage amount, the water leakage estimation area, and the expected value and maximum value of the water leakage damage amount in the water leakage estimation area on the input unit 120. In FIG. 10, an example of the display screen of the water leak estimation result displayed on the display unit 121 is shown.

  As described above, the process of estimating and presenting the position and amount of water leakage occurring in the water distribution network by the water leakage estimation unit 124, the pipe network analysis calculation unit 127, the water leakage damage amount estimation unit 125, and the information presentation unit 132. Is done. The administrator of the water leakage countermeasure support apparatus 101 can grasp the occurrence of water leakage, its position (area), the amount of water leakage, and the amount of water leakage damage by checking the display content.

  That is, the water leakage damage estimation unit estimates the water leakage parameters (water leakage estimation area / amount) based on the pipe network analysis calculation, and the water leakage damage by the water leakage estimation area, the water leakage estimation amount, and the pipeline included in the area. The total amount of water leakage damage in the above area is estimated from the amount.

  Next, a process (4) for developing and presenting a decompression water distribution plan at the time of occurrence of water leakage will be described with reference to FIG. This processing is performed when it is estimated that water leakage has occurred in the water distribution pipe network 113 in the water leakage estimation processing. Depressurized water distribution lowers the water distribution pressure from the water distribution area 110 to the water distribution pipe network 113 and is effective as one of the measures against water leakage. The amount of water damage caused to the house may increase. The decompression water distribution plan determines the optimal water distribution pressure that minimizes the amount of damage due to leakage and water outage. In other words, when the amount of water leakage damage is large, the Water Leakage Countermeasures Planning Department calculates the pressure reduction rate of the reduced pressure water distribution to reduce the amount of water leakage damage. Calculate the depressurization rate of the reduced pressure water distribution that minimizes the total amount of damage due to water outage, and plan to perform the depressurized water distribution.

  FIG. 11 is a flowchart showing a process for developing and presenting a decompression water distribution plan when a water leak occurs.

  In step S1101, the pipe network analysis calculation unit 127 acquires the pipe network model information of the water distribution pipe network 113 from the pipe line information management table 140 and the node information management table 141, and the flow rate value and pressure value of the water distribution pump 111 at the present time. Then, pipe network analysis calculation is performed based on boundary conditions such as a predetermined demand distribution on the distribution pipe network 113, and pressure distribution and flow distribution on the distribution pipe network 113 are calculated. And the average pressure P1 of the said water leak estimation area is estimated by taking the average of the pressure calculation value in all the nodes 115 contained in the water leak estimation area specified by the said water leak estimation process.

  In step S1102, the reduced pressure water distribution plan formulation unit 128 sets the water distribution pressure reduction rate of the pump 111 to 5%.

  In step S1103, the pipe network analysis calculation unit 127 performs pipe network analysis calculation using the boundary condition of the pipe network analysis calculation used in step S1101 and the distribution pressure of the pump 111 reduced by the reduction rate. The pressure distribution and flow rate distribution on the water pipe network 113 are calculated. And the average of the pressure calculation value in all the nodes 115 contained in the said water leak estimation area is taken, and the average pressure P2 of the said water leak estimation area when decompressing water distribution is estimated. Here, since the amount of water leak is proportional to the power of 0.5 at the leak point, the estimated water leak calculated by the above water leak estimation process is multiplied by the power of 0.5 of (P2 / P1) to distribute the reduced pressure water. Calculate the estimated amount of water leakage. Then, based on the calculated pressure distribution, it is confirmed whether or not there is an area that does not reach the specified pressure on the distribution pipe network 113, and a water cutoff area (a pipe having a node pressure that does not reach the specified pressure) is estimated. .

  In step S <b> 1104, the water breakage damage estimation unit 126 calculates an estimated value of the water breakage damage in the water breakage estimation area. That is, the amount of water breakage for each pipe line is acquired from the damage management table for each pipe line 146, and the amount of water breakage damage for each of all the pipes 114 (the pipes that have not reached the specified pressure) existing in the water break estimation area. And the sum is taken as the estimated value of the water outage damage in the water outage estimation area.

  In step S1105, the water leakage damage estimation unit 125 calculates an expected value and a maximum value of the water leakage damage amount in the water leakage estimation area. That is, for all the pipelines 114 (the pipelines that may have leaked water) existing in the leakage estimation area, the pipeline diameter and the pipeline length of each pipeline 114 are acquired from the pipeline information management table 140, From the damage management table 146 for each pipeline, obtain the amount of water leakage for each pipeline and the standard amount of leakage that has occurred. For each of the pipes 114, the amount of water leakage damage is calculated assuming that water leakage damage occurs only when the estimated amount of water leakage when the reduced pressure water distribution is performed exceeds the reference water leakage amount. The maximum value of the water leakage damage amount of each pipe 114 is set as the maximum value of the water leakage damage amount in the water leakage estimation area. The weighted average of each leakage damage amount according to the length of each pipeline 114 is set as the expected value of the leakage damage amount in the leakage estimation area.

  In step S1106, the reduced pressure water distribution plan formulation unit 128 determines whether the reduction rate of the water distribution pressure of the pump 111 exceeds 50%. When the distribution pressure reduction rate is 50% or less, the process proceeds to step S1107, and when it exceeds 50%, the process proceeds to step S1108.

  In step S1107, the depressurized water distribution plan formulation unit 128 increases the water distribution pressure reduction rate of the pump 111 by 5%, and proceeds to step S1103. That is, the distribution pressure reduction rate changes until it reaches 5%, 10%,..., 50%, and steps S1103 to S1107 are repeated.

  In step S1108, the depressurized water distribution plan formulation unit 128 calculates the estimated value of the water damage and the expected value of the water leakage damage in each case of a distribution pressure reduction rate of 5%, 10%,..., 50%. Is calculated, and the reduction rate of the distribution pressure when the sum is minimized is determined as the optimum reduction rate.

  In step S1109, the information presenting unit 132 provides, as the decompression water distribution plan, the estimated leakage amount, the expected value and the maximum value of the leakage damage amount in the leakage estimation area, the estimated value of the leakage estimation area and the leakage damage amount for each decompression rate. It is displayed on the input unit 120, and further, as the optimum decompression water distribution plan, the optimum reduced water distribution rate when the sum of the expected leakage leakage amount is minimized is displayed on the input unit 120. In FIG. 12, an example of the display screen of the decompression water distribution plan formulation result displayed on the display unit 121 is shown.

  As described above, the decompression water distribution plan formulation unit 128, the pipe network analysis calculation unit 127, the water leakage damage amount estimation unit 125, the water breakage damage amount estimation unit 126, and the information presentation unit 132 formulate the decompression water distribution plan when a water leak occurs. Processing to present is performed. By confirming the display content, the administrator of the water leakage countermeasure support device 101 can perform optimal decompression water distribution that minimizes the amount of water damage and the amount of water damage. In this embodiment, the depressurization water distribution plan is formulated at a time when a water leak pipe is not specified, that is, when a water leak position is estimated as an area. At the time when is identified, the decompression water distribution plan may be formulated. In this case, the processing in steps S1101 to S1109 may be performed using the pressure in the water leakage pipe and the water leakage damage amount instead of the water leakage damage amount in the water leakage estimation area. It is not necessary to estimate the leakage area by the leakage estimation process, and it is possible to develop a more accurate decompression water distribution plan.

  Next, the process (5) for formulating and presenting the water leakage investigation plan when water leakage occurs will be described with reference to FIG. This process is performed when it is estimated that water leakage has occurred in the distribution pipe network 113 in the water leakage estimation process, and the water leakage does not appear on the ground. If there is no water leak on the ground, it is necessary to conduct a water leak survey to identify the location of the water leak. In general, a water leak investigation is conducted by a trained water leak investigator listening to the sound of a water leak using a water leak probe. As shown in FIG. 13, in the water leakage investigation plan, when the water leakage estimation area is divided into a plurality of meshes 1311 (for example, 100 m square), a leaky water researcher with a limited number of people should be dispatched and investigated preferentially. The priority of water leakage investigation for each mesh is determined. In the present embodiment, a water leakage investigation plan is drafted on the assumption that the higher the damage amount when water leakage occurs, the higher the priority for specifying the water leakage position. FIG. 14 is a flowchart showing a process for formulating and presenting a water leakage investigation plan when water leakage occurs.

  In step S1401, the water leakage investigation plan formulation unit 129 divides the water leakage estimation area identified by the water leakage estimation process into a plurality of meshes 1311. Then, the position information of each pipeline 114 is acquired from the pipeline information management table 140 and the node information management table 141, and the pipeline 114 belonging to each mesh 1311 is identified. When one pipeline 114 is included in a plurality of meshes 1311, the mesh 1311 including the largest number of the pipelines 114 is regarded as the mesh 1311 to which the pipeline 114 belongs.

  In step S1402, the leakage damage amount estimation unit 125 calculates the expected value and the maximum value of the leakage damage amount in each mesh 1311. That is, for all the pipes 114 belonging to each mesh 1311 (the pipes in which water leakage may have occurred), the pipe diameter and the pipe length of each pipe 114 are acquired from the pipe information management table 140, and the pipes From the damage management table for each road 146, the amount of water leakage for each pipe line and the standard amount of leakage for occurrence of water damage are obtained. For each of the pipelines 114, only when the estimated leakage amount calculated by the leakage estimation process or the estimated estimated leakage amount determined by the reduced pressure distribution plan formulation procedure exceeds the reference leakage amount, Calculate the amount of water leakage damage. The maximum value of the water leakage damage amount in each of the pipelines 114 is set as the maximum value of the water leakage damage amount in the mesh 1311. The weighted average of each water leakage damage amount according to the pipe length of each pipe line 114 is set as an expected value of the water leakage damage amount in the mesh 1311.

  In step S1403, the water leakage investigation plan formulation unit 129 determines the priority of the water leakage investigation in descending order of the expected value of the water leakage damage amount of each mesh 1311, and drafts the water leakage investigation plan.

  In step S <b> 1404, the information presentation unit 132 displays the expected value and maximum value of the water leakage damage amount of each mesh 1311 and the priority of water leakage investigation (leakage investigation plan) on the input unit 120. In FIG. 15, an example of the display screen of the water leak investigation plan formulation result displayed on the display unit 121 is shown.

  As described above, the leakage detection plan formulation unit 129, the leakage damage amount estimation unit 125, and the information presentation unit 132 perform the process of formulating and presenting the leakage survey plan when a leakage occurs. By confirming the display content, the administrator of the water leakage countermeasure support apparatus 101 can implement a water leakage investigation plan that preferentially investigates from a location (mesh) where water leakage damage is large.

  That is, the water leakage damage estimation part divides the estimated water leakage position into a plurality of areas (mesh), estimates the water leakage damage for each area, and the water leakage countermeasure planning part determines the water leakage damage for each estimated area. Based on the forehead and the amount of water damage, plan countermeasures for water leakage for each area and determine the priority of water leakage countermeasures for each area.

  Next, a process (6) for developing and presenting a valve operation personnel deployment plan when water leakage occurs will be described with reference to FIG. This process is performed when it is estimated that water leakage has occurred in the distribution pipe network 113 in the water leakage estimation process, and the water leakage does not appear on the ground. As one of the measures against water leakage, there is a method of stopping water leakage by stopping (stopping water) supply of water to the pipeline where water leakage has occurred by closing the valve 112 on the water distribution pipe network 113. Generally, since the valve 112 is often manually operated, it is necessary to dispatch an operator to the site in order to close the valve. If water leakage does not appear on the ground, it is necessary to have an operator stand near the appropriate valve so that the necessary valve can be closed immediately after the water leakage pipe has been identified. As shown in FIG. 13, in the valve operation personnel deployment plan, when the water leakage estimation area is divided into a plurality of meshes 1311 (for example, 500 m square), to which mesh a limited number of valve operators should be dispatched preferentially The priority of personnel deployment for each mesh is determined. In the present embodiment, the personnel deployment plan is formulated on the assumption that the mesh with a higher damage amount when a water leakage occurs and the mesh with a larger number of valves to be closed has a higher priority for personnel deployment. FIG. 16 is a flowchart showing a process for developing and presenting a valve operation personnel deployment plan when water leakage occurs.

  In step S <b> 1601, the personnel deployment plan formulation unit 130 divides the water leak estimation area specified by the water leak estimation process into a plurality of meshes 1311. The mesh 1311 at this time may be divided differently from the mesh divided for the water leakage investigation. Then, the position information of each pipeline 114 is acquired from the pipeline information management table 140 and the node information management table 141, and the pipeline 114 belonging to each mesh 1311 is identified. When one pipeline 114 is included in a plurality of meshes 1311, the mesh 1311 including the largest number of the pipelines 114 is regarded as the mesh 1311 to which the pipeline 114 belongs.

  In step S1602, the valve opening / closing plan formulation unit 131 calculates an expected value and a maximum value of the number of closed valves in each mesh 1311. That is, the connection information of each pipeline 114 and the installation position information of the valve 112 are acquired from the pipeline information management table 140 and the node information management table 141, and all the pipelines 114 belonging to each mesh 1311 (the possibility of occurrence of water leakage) The valve to be closed in order to shut off the pipe 114 by searching the pipe network based on the pipe connection information until the valve 112 or the pipe end is detected from each of the pipes having a characteristic. 112 is determined and the number of valves to be closed is calculated. The maximum value of the number of closing valves in each pipeline 114 is set as the maximum value of the number of closing valves in the mesh 1311. The average value of the number of closing valves in each pipe line 114 is set as the average value of the number of closing valves in the mesh 1311.

  In step S1603, the water leakage damage amount estimation unit 125 calculates an expected value and a maximum value of the water leakage damage amount in each mesh 1311. That is, for all the pipes 114 belonging to each mesh 1311 (the pipes in which water leakage may have occurred), the pipe diameter and the pipe length of each pipe 114 are acquired from the pipe information management table 140, and the pipes From the damage management table for each road 146, the amount of water leakage for each pipe line and the standard amount of leakage for occurrence of water damage are obtained. For each of the pipelines 114, only when the estimated leakage amount calculated by the leakage estimation process or the estimated estimated leakage amount determined by the reduced pressure distribution plan formulation procedure exceeds the reference leakage amount, Calculate the amount of water leakage damage. The maximum value of the water leakage damage amount in each of the pipelines 114 is set as the maximum value of the water leakage damage amount in the mesh 1311. The weighted average of each water leakage damage amount according to the pipe length of each pipe line 114 is set as an expected value of the water leakage damage amount in the mesh 1311.

  In step S1604, the personnel deployment plan formulation unit 130 takes a weighted average of the expected value of the water leakage damage amount of each mesh 1311 and the expected value of the number of closed valves (for example, converted to 100,000 yen per number of closed valves). The priority of personnel deployment is determined in descending order of the weighted average value, and a valve operation personnel deployment plan is drawn up.

  In step S1605, the information presentation unit 132 inputs the expected value, maximum value, average value of the number of closed valves, maximum value, and priority of personnel deployment (valve operation personnel deployment plan) of each mesh 1311. 120. In FIG. 17, an example of the display screen of the valve operation personnel deployment plan formulation result displayed on the display unit 121 is shown.

  As described above, the personnel deployment plan formulation unit 130, the valve opening / closing plan formulation unit 131, the water leakage damage estimation unit 125, and the information presentation unit 132 perform the process of formulating and presenting the valve operation personnel deployment plan when a water leak occurs. Done. The administrator of the water leakage countermeasure support apparatus 101 confirms the above display contents to preferentially deploy personnel to a place (mesh) where there is a large amount of water leakage damage and a place where there are many valves to be closed (mesh). It will be possible to implement a valve operation personnel deployment plan.

  In other words, the water leakage countermeasure planning department deploys personnel to operate the valves in the water distribution network based on the amount of water leakage estimated for each area when opening and closing the valves in the water distribution network. Decide the order of priority.

  Next, a process (7) for developing and presenting a valve opening / closing plan when water leakage occurs will be described with reference to FIGS. This process is carried out when it is estimated that water leakage has occurred in the distribution pipe network 113 in the above-described water leakage estimation process, and the water leakage pipeline is identified by the appearance of water leakage or the water leakage investigation. The bubble open / close plan determines the valves that should be closed and the order of closing to stop the water supply by shutting down the water supply to the pipeline where the water leaks (stopping water), and further closing the valve to the downstream side. The valve which should be opened to be able to supply water to the water cutoff area when another water cutoff area occurs is determined.

  FIG. 18 is a flowchart showing a process for developing and presenting a valve opening / closing plan when water leakage occurs. FIG. 19 is an explanatory diagram of a water shutoff area generated by closing the valve and water supply to the water shutoff area by opening the valve.

  In step S1801, the leakage damage amount estimation unit 125 identifies the leakage pipeline 114a on the distribution pipe network 113 based on the appearance of leakage on the ground estimated by the leakage estimation process or the leakage investigation result. Then, the amount of water leakage damage of the water leakage pipeline 114a and the reference amount of water leakage occurrence are acquired from the damage amount management table 146 for each pipeline. Only when the estimated amount of water leak calculated by the above water leak estimation process exceeds the above-mentioned reference water leak amount, the amount of water leak damage from the water leak pipe 114a (when water leakage countermeasures such as valve closing are not taken) Calculate the amount of water leakage).

  In step S1802, the valve opening / closing plan formulation unit 131 acquires the connection information of each pipeline 114 and the installation position information of the valve 112 from the pipeline information management table 140 and the node information management table 141, and from the leakage pipe 114a. By searching the pipe network based on the pipe connection information until the valve 112 or the pipe end is detected, the valve 112a to be closed to shut off the water leakage pipe 114a is determined. Then, the water cutoff area 10a including the water leakage conduit 114a when all the valves 112a are closed is estimated.

  In step S1803, the valve opening / closing plan formulation unit 131 determines the order in which the closing valves 112a are closed. As the valve is connected to a pipe having a flow direction flowing into the water cut area 10a and a valve connected to a pipe having a large flow rate or a pipe having a large diameter, the water can be cut off more quickly. Therefore, the valve opening / closing plan formulating unit 131 has a pipe line having a flow direction flowing into the water shutoff area 10a and a pipe having a large flow rate based on the pipe network analysis calculation result performed in step S1101 of the decompression water distribution plan formulating process. The closing order of the closing valves 112a is determined so as to close from the closing valve connected to the passage or the pipe having a large diameter.

  In step S1804, the valve opening / closing plan formulating unit 131 is based on the connection information of each pipeline 114 and the installation position information of the valve 112, and the water cutoff areas 10b, 10c (which are separated from the distribution reservoir 110 by the occurrence of the water cutoff area 10a). The water cutoff area located downstream of the water cutoff area 10a) is estimated.

  In step S1805, the valve opening / closing plan formulation unit 131 opens the valve 112b (a valve that is normally closed) that should be opened to supply water from another water distribution block to the divided water cutoff areas 10b and 10c. decide. In the example of FIG. 9, it is assumed that water can be supplied to the water cutoff area 10c by the communication valve 12b installed in the communication pipe from another water distribution block 113a. It is assumed that the water cut-off area 10c in which water supply is possible is not regarded as a water cut-off area.

  In step S1806, the water damage estimation unit 126 calculates an estimated value of the water damage for each of the water shutoff areas 10a and 10b. That is, the amount of water breakage for each pipe line is obtained from the damage amount management table 146 for each pipe, the amount of water breakage is calculated for each of all the pipes 114 in each water break area, and the sum total is calculated as the above-mentioned water break estimation. Estimated amount of water damage in the area.

  In step S1807, the valve opening / closing plan formulation unit 131 generates a water leakage area 10a in which the amount of water leakage from the water leakage conduit 114a (the amount of water leakage due to leakage prevention measures such as valve closing) occurs due to the valve opening / closing. It is determined whether or not the total amount of water damage for 10b is exceeded. If it exceeds the maximum value, the valve opening / closing is less likely to cause damage due to water leakage or water breakage. Therefore, it is determined that the valve opening / closing is effective, and vice versa. Then, the valve opening / closing plan formulating unit 131 formulates a valve opening / closing plan composed of the determined valve 112a to be closed and its closing order, the valve 112b to be opened, and the effectiveness of valve opening / closing.

  In step S <b> 1808, the information presentation unit 132 provides the input unit 120 with the leaked pipeline 114 a, the estimated amount of leaked water, and the amount of damage due to water leakage (the amount of water leaked when no leakage measures such as valve closing) are performed. In addition, as a valve opening / closing plan, the valve 112a to be closed and its closing order, the valve 112b to be opened, the effectiveness of the valve opening / closing, and the water cutoff areas 10a and 10b and the amount of water damage caused by the valve opening / closing are displayed. It is displayed on the input unit 120. FIG. 20 shows an example of a display screen of a valve opening / closing plan formulation result displayed on the display unit 121.

  As described above, the valve opening / closing plan formulation unit 131, the water leakage damage estimation unit 125, the water leakage damage estimation unit 126, and the information presentation unit 132 perform processing for formulating and presenting the valve opening / closing plan. By confirming the display content, the administrator of the water leakage countermeasure support apparatus 101 can execute a valve opening / closing plan for water leakage of the water leakage pipe line in consideration of costs such as the water leakage damage amount and the water leakage damage amount.

  That is, when the leakage damage amount estimation unit estimates leakage damage, the closing valve determination unit (valve opening / closing plan formulation unit 131) determines a valve to be closed from a plurality of valves installed in the distribution pipe network. The open valve determination unit (valve opening / closing plan formulation unit 131) determines a valve to be opened from among the plurality of valves so as to supply water to a water shut-off area generated by closing the valve. Further, the valve closing order determination unit valve opening / closing plan formulation unit 131) closes the valve to be closed based on the flow rate, the diameter or the flow direction of the pipe line in which the valve to be closed determined by the closing valve determination unit is installed. Determine the order.

  As described above, according to the embodiment of the present invention, efficient decompression water distribution, leakage investigation, valve operation personnel deployment, valve opening and closing, taking into account costs such as the amount of damage due to water leakage and the amount of damage due to water leakage due to measures against leakage It is possible to implement measures such as water leakage.

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 118 ... Network, 120 ... Input unit, 121 ... Display unit, 122 ... Data registration unit, 123 ... Data collection unit, 124 ... Water leakage estimation unit, 125 ... Water leakage damage estimation unit, 126 ... Water leakage damage estimation unit, 127 ... Pipe network analysis calculation unit, 128 ... Decompression water distribution plan formulation unit, 129 ... Leakage investigation plan formulation unit, 130 ... Personnel deployment plan formulation unit, 131 ... Valve opening / closing plan formulation unit, 140 ... Pipe line information management table, 141 ... Node information management table, 142 ... Customer information management table, 143 ... Water leakage damage amount management table, 144 ... Water outage day management table, 145 ... Water outage damage amount management Buru, 146 ... conduit by damage amount management table, 147 ... measurement data management table.

Claims (9)

A leakage damage amount storage unit for preliminarily storing a leakage amount when leakage occurs from a pipeline in the distribution pipe network;
A water damage data storage unit for preliminarily storing the amount of water damage caused when the pipe line is shut down;
When water leakage occurs in the water distribution pipe network, the amount of water leakage damage in the water distribution pipe network is estimated from the information on the pipeline where the water leakage occurs and the water leakage damage amount stored in the water leakage damage amount storage unit. A leakage damage amount estimation unit,
Estimate the amount of water breakage in the distribution pipe network from information on the pipeline where the water break occurs and the amount of water damage stored in the water loss damage storage unit when water break occurs in the water distribution pipe network A water damage estimation part
A water leakage countermeasure support device, comprising: a water leakage countermeasure planning unit that plans countermeasures against water leakage based on the estimated water leakage damage amount and the estimated water leakage damage amount. In the water leakage countermeasure support device according to claim 1,
The water leakage countermeasure planning unit opens and closes a valve in the water distribution pipe network so as to cut off the pipe where the water leakage has occurred, based on a comparison between the amount of water leakage damage and the amount of water damage. Water leakage countermeasure support device characterized by planning. In the water leakage countermeasure support device according to claim 1,
The water leakage countermeasure planning section shall calculate the pressure reduction rate of the reduced pressure water distribution in order to reduce the amount of water leakage so as to reduce the sum of the water damage value and the water damage value, and plan to perform the pressure reduction water distribution. Water leakage countermeasure support device characterized by. In the water leakage countermeasure support device according to claim 1,
The water leakage damage amount estimation unit divides the estimated water leakage position into a plurality of areas, estimates the water leakage damage amount for each area,
The water leakage countermeasure planning unit plans water leakage countermeasures for each area based on the estimated amount of water leakage damage for each area, and determines the priority of water leakage countermeasures for each area. Support device. In the water leakage countermeasure support device according to claim 4,
When the water leakage countermeasure planning unit opens and closes the valve in the water distribution pipe network, based on the amount of water leakage estimated for each area, the water leakage countermeasure planning unit assigns a person who operates the valve in the water distribution pipe network to the area. A water leakage countermeasure support device characterized by determining the priority of deployment. In the water leakage countermeasure support device according to claim 2,
When the water leakage countermeasure planning unit plans to open and close the valve,
A closing valve determining unit for determining a valve to be closed from a plurality of valves installed in the water distribution pipe network;
An open valve determination unit that determines a valve to be opened from among the plurality of valves so as to supply water to a water cutoff area generated by the closing of the valve. In the water leakage countermeasure support device according to claim 6,
When the water leakage countermeasure planning unit plans to open and close the valve,
A valve closing order determining unit that determines a closing order of the valves to be closed based on a flow rate, a caliber, or a flow direction of a pipe line in which the valve to be closed determined by the closing valve determining unit is installed; Water leakage countermeasure support device. In the water leakage countermeasure support device,
Store the amount of damage caused by leakage when water leaks from the pipeline in the water distribution pipe network in advance,
Store the amount of water damage when the pipe line is cut off in advance in the amount of water damage storage unit,
In the case where water leakage occurs in the water distribution pipe network, the water leakage damage amount estimation unit calculates the water distribution pipe network from the information on the pipeline in which water leakage occurs and the water leakage damage amount stored in the water leakage damage amount storage unit. Estimating the amount of water leakage in the
When the water breakage amount estimation unit generates water breakage in the water distribution pipe network, the distribution pipe network is obtained from the information on the pipeline where the water breakage occurs and the water breakage damage amount stored in the water breakage damage storage unit. Estimating the amount of water damage caused by
A leakage countermeasure support method comprising: a leakage leakage planning section planning a countermeasure against leakage based on the estimated leakage damage amount and the estimated leakage damage amount. In the water leakage countermeasure support method according to claim 8,
The water leakage countermeasure planning unit of the water leakage countermeasure support device includes a valve in the distribution pipe network so as to cut off the pipeline in which water leakage has occurred, based on a comparison between the amount of water leakage damage and the amount of water damage. A method for supporting countermeasures against water leakage, comprising a step of planning to open and close the door.

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