JP5365402B2 - Water storage level information processing apparatus and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reservoir water level information processor which can properly determine the time for a change in the water level of a reservoir, and a program. <P>SOLUTION: This reservoir water level information processor includes: a reservoir water level change detection means for detecting the change of the reservoir water level on the basis of a measured value input from a water gauge for measuring the reservoir water level of the reservoir; a duration time measuring means for measuring the duration time of the change of the reservoir water level which is detected by the reservoir water level change detection means; and a reservoir water level change time determination means which sets the maximum value of the duration time until the reservoir water level is returned to the first reservoir water level again after being changed to the second reservoir water level from the first reservoir water level, in steps of changing the reservoir water level in a fixed direction from the first reservoir water level to the second reservoir water level and from the second reservoir water level to the third reservoir water level, as a reservoir water level change determination time, and which sets the time when the duration time of the third reservoir water level reaches the reservoir water level change determination time, as the time of a shift to the third reservoir water level. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a water storage level information processing apparatus and program, and more particularly to a water storage level information processing apparatus and program for performing information processing related to a water storage level in a reservoir.

  In the management of reservoirs in dams, weirs, etc., it is necessary to grasp the inflow, which is the total amount of river flow and rainfall. As a representative method for calculating the inflow of the reservoir, there is a reservoir level change method. The reservoir level change method calculates the inflow based on the change in the reservoir volume and the time required for the change in the reservoir level. The technique described in Patent Document 1 also uses the stored water level changing method.

  In using the water level change method, it is necessary to detect the change of the water level as accurately as possible. This is because the error at the time of the change in the water storage level becomes an error in the time required for the change in the water storage level, and consequently an error in the inflow amount. Specifically, if it is determined that the time required for the change of the water storage level is shorter than the actual time, the calculation result by the water storage level change method becomes a value larger than the actual inflow amount. If it is determined that the time required for the change in the reservoir level is longer than the actual time, the calculation result by the reservoir level change method becomes a value smaller than the actual inflow amount.

JP-A-8-170443

  However, the behavior of the actual reservoir water level (water surface) is not always simple, and it is difficult to appropriately determine the timing of the change in the reservoir level.

  FIG. 1 is a diagram for explaining the behavior of the water surface in the process of changing the reservoir level of the reservoir. In the figure, the horizontal axis represents time, and the vertical axis represents the measured value of the reservoir level by a water level gauge.

  As shown in the figure, when the reservoir level changes from n (cm) to n + 1 (cm), after n and n + 1 are repeatedly detected, n + 1 is continuously detected. This is because the water surface is not completely flat and has undulations (swaying).

  In the figure, the reservoir level is stable at n + 1 after t6. Therefore, when the reservoir level change time to n is t1, ideally, (t6-t1) should be the time required for the reservoir level change. However, if it is determined that the water storage level has changed to n + 1 at t2, t3, t4, or t5, the inflow amount is calculated as a larger value than the actual amount. In particular, when t2 is set when the water storage level changes, the error becomes large.

  It should be noted that the accuracy of the water level gauge also greatly affects the detection of shaking shown in FIG. That is, the accuracy of the water level gauge is generally 1 (cm), and n + 0.9 (cm) is detected as n (cm). Therefore, even 1 mm of shaking is measured as 1 cm of shaking. As a result, the number of fluctuations in units of 1 cm is detected more than the actual number of times, making it more difficult to determine when the reservoir level changes.

  On the other hand, in order to determine that t6 is when the reservoir level n + 1 changes, it is necessary to observe the stability of the reservoir level n + 2, which is not shown. If it does so, the judgment time at the time of the change of the water storage level n + 1 will be overdue greatly, As a result, there exists a problem that calculation of an inflow amount cannot be performed timely.

  This invention is made | formed in view of said point, Comprising: It aims at provision of the stored water level information processing apparatus and program which can determine appropriately the timing of the change of a stored water level.

  Therefore, in order to solve the above-mentioned problem, a water level change detecting means for detecting a change in the water level based on a measured value inputted from a water level meter for measuring the water level of the reservoir, and a water level change detecting means detected by the water level change detecting means. A duration measuring means for measuring the duration of the change in the reservoir level, and the reservoir level in a certain direction from the first reservoir level to the second reservoir level and from the second reservoir level to the third reservoir level. In the process of changing, the maximum value of the duration until the first reservoir level changes from the first reservoir level to the second reservoir level and returns to the first reservoir level is set as the reservoir level change confirmation time, And a storage level change timing determination means for setting a time when the duration of the third storage level reaches the storage level change determination time as a time of change to the third storage level.

  In such a stored water level information processing apparatus, it is possible to appropriately determine the time of change of the stored water level.

  According to the disclosed technology, it is possible to appropriately determine the timing of the change in the reservoir level.

It is a figure for demonstrating the behavior of the water surface in the process of the change of the reservoir level of a dam. It is a figure which shows the structural example of the dam monitoring control system in embodiment of this invention. It is a figure which shows the hardware structural example of the inflow amount calculating apparatus in embodiment of this invention. It is a figure which shows the function structural example of the inflow amount calculation apparatus in embodiment of this invention. It is a figure for demonstrating the determination method of the stored water level after the change timing of the stored water level by the stored water level change determination part. It is a figure for demonstrating determination of the stored water level after a change. It is a flowchart for demonstrating the process sequence of the calculation process of the inflow amount by an inflow amount calculation apparatus. It is a figure for demonstrating the calculation process of inflow amount. It is a flowchart for demonstrating the determination process of a water storage level change fixed time and a water storage level change.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 2 is a diagram illustrating a configuration example of the dam monitoring control system according to the embodiment of the present invention.

  In the figure, a dam monitoring and control facility 1 is a facility that monitors the state of a reservoir 3 formed by a dam 2 and controls the dam 2 as necessary, and includes an inflow amount calculation device 10. The inflow amount calculation device 10 is an information processing device (computer) that calculates the inflow amount into the reservoir 3, and is an example of a reservoir level information processing device. The inflow amount calculation device 10 is connected to the water level gauge 4 and the discharge facility 5. The water level meter 4 is a device that measures the water level of the reservoir 3. The discharge facility 5 is a device (discharge flow measuring means) that measures the discharge flow from the gate 21 of the dam 2. The measurement values obtained by the water level meter 4 and the discharge flow rate 5 are sequentially transmitted to the inflow amount calculation device 10.

  FIG. 3 is a diagram illustrating a hardware configuration example of the inflow amount calculating device according to the embodiment of the present invention. 3 includes a drive device 100, an auxiliary storage device 102, a memory device 103, a CPU 104, an interface device 105, a display device 106, and an input connected to each other via a bus B. Device 107.

  A program that realizes processing in the inflow amount calculation device 10 is provided by a recording medium 101 such as a CD-ROM. When the recording medium 101 on which the program is recorded is set in the drive device 100, the program is installed from the recording medium 101 to the auxiliary storage device 102 via the drive device 100. However, the program need not be installed from the recording medium 101 and may be downloaded from another computer via a network. The auxiliary storage device 102 stores the installed program and also stores necessary files and data.

  The memory device 103 reads the program from the auxiliary storage device 102 and stores it when there is an instruction to start the program. The CPU 104 realizes functions related to the inflow amount calculating device 10 according to a program stored in the memory device 103. The interface device 105 is used as an interface for network connection with the water level gauge 4 and the discharge facility 5. The display device 106 displays a GUI (Graphical User Interface) or the like by a program. The input device 107 is a keyboard, a mouse, or the like, and is used for inputting various operation instructions.

  FIG. 4 is a diagram illustrating a functional configuration example of the inflow amount calculating device according to the embodiment of the present invention. In the figure, an inflow amount calculation device 10 includes a data recording unit 11, a stored water level change determination unit 12, an inflow amount calculation unit 13, a measured value storage unit 14, a data storage unit 15, and the like. The functions of these units are realized by processing executed by the CPU 104 by a program installed in the inflow amount calculation device 10.

  The data recording unit 11 associates the measured value of the stored water level (stored water level data) input from the water level gauge 4 and the measured value of discharged water (discharged data) input from the discharge facility 5 with each measurement time. It records in the measured value storage unit 14.

  The reservoir level change determination unit 12 includes a reservoir level change detection unit 121, a duration measurement unit 122, a reservoir level change timing determination unit 123, and the like. The timing at which the reservoir level changes (when the reservoir level changes) and after the change The water storage level (the water storage level after change) is determined, and the determination result is recorded in the data storage unit 15.

  The inflow amount calculation unit 13 calculates the inflow amount in the reservoir 3 using the determination result by the storage level change determination unit 12 as input information, using the storage level change method defined by the equation (1), and calculates The result is recorded in the data storage unit 15 in association with the time of calculation.

In equation (1), the meaning of each parameter is as follows.
Qit: Total amount of inflow [m ³ / s]
Vh [t]: Effective water storage amount [m ³ / s] when calculating the current inflow rate
Vh [t−T]: Effective water storage amount [m ³ / s] at the time of calculating the total inflow amount (before T minutes)
Qot [t−i]: Total discharge flow [m ³ / s] i minutes before the current inflow calculation
T: Time required to change the reservoir level [minutes]

  In Equation (1), the first term corresponds to the storage flow rate obtained from the amount of change in the effective water storage amount at the time of the previous inflow calculation and the current inflow calculation, and the second term is the average discharge discharged from the reservoir 3. Corresponds to the flow rate.

  The measurement value storage unit 14 is a predetermined storage area in the memory device 103 or the auxiliary storage device 102, for example. The data storage unit 15 is a predetermined storage area in the auxiliary storage device 102, for example.

  By the way, the parameters (Vh [t], Vh [t−T]) relating to the water storage amount are based on the water storage level determined by the water storage level change determination unit 12 and the water storage level determination data stored in the data storage unit 15. Is derived. The water storage level determination data is, for example, data in which the water storage amount is recorded for each water storage level every 1 m. Further, the parameter (Qot [t−i]) related to the discharge flow rate is derived based on the discharge flow data input from the discharge facility 5. Further, T is derived from the timing of the change in the storage level determined by the storage level change determination unit 12. Therefore, the accuracy of the calculation result (that is, the inflow amount) by the inflow amount calculation unit 13 greatly depends on the determination result by the reservoir level change determination unit 12. Therefore, as shown in FIG. 5, the storage level change determination unit 12 of the present embodiment determines the timing of the change of the storage level and the storage level after the change.

  FIG. 5 is a diagram for explaining the change timing of the storage level and the determination method of the storage level after the change by the storage level change determination unit. In the figure, the horizontal axis indicates the time axis (elapse of time) from the start of measurement of the inflow amount (water level change). The vertical axis indicates the measured value of the stored water level by the water level meter 4.

  In the figure, the water storage level (reference water level) at the start of measurement is N0 (cm), and thereafter, the water storage level is changed (increased) in a certain direction as N0 → N1 → N2. Note that N1 = N0 + 1 (cm). N2 = N1 + 1 (cm).

  When the reservoir level changes, the reservoir level before and after the change is empirically detected repeatedly, and then the reservoir level after the change is stabilized. In addition, the repetition cycle becomes gradually longer. For example, in the example of FIG. 5, in the process of the change from the water level N0 to the water level N1, four pulses (p1) from the water level N0 to the water level N1 until the water level becomes stable after the time t1. ~ P4) have been detected. Here, the duration of the reservoir level N1 in the pulses p1 and p2 is 1 minute, the duration of the reservoir level N1 in the pulse p3 is 2 minutes, and the duration of the reservoir level N1 in the pulse p4 is 3 minutes. The same applies when the water level N1 changes to the water level N2. Three times (p5 to p7) from the reservoir level N1 to the reservoir level N2 are detected until the reservoir level N2 is stabilized after time t2.

  In the present embodiment, the reservoir level change determination unit 12 continues the pulse detected in the process of the first reservoir level change (the process of change from the reservoir level N0 to the reservoir level N1) from the start of measurement. The duration of the pulse with the longest time is used to determine the change in the reservoir level after the next. The duration is referred to as “reservoir level change confirmation time ΔT”, and hereinafter simply referred to as “ΔT”. ΔT is determined (determined) by the water storage level change determination unit 12 and recorded in the data storage unit 15.

  Specifically, the pulse with the longest duration among the pulses p1 to p4 in FIG. 5 is the pulse p4, and the duration is 3 minutes. Therefore, 3 minutes is set as ΔT. The storage level change determination unit 12 sets the storage level N2 when the duration of the storage level N2 reaches ΔT in the next change in the storage level (that is, the change from the storage level N1 to the storage level N2 in the figure). It is determined that there is a change. In FIG. 5, when the duration of the water storage level N2 reaches ΔT, it is time (t2 + ΔT). Therefore, in the example of the figure, it is determined that it is time (t2 + ΔT) when the reservoir level N2 changes.

  Moreover, the water storage level change determination part 12 determines the water level detected most (long time) from the time t2 to the time (t2 + ΔT) as the water level after the change. This point will be described with reference to FIG.

  FIG. 6 is a diagram for explaining the determination of the stored water level after the change. In the same figure, an enlarged display is made after time t2 in FIG. As shown in the drawing, during the period from time t2 to time (t2 + ΔT), the water storage level N3 (N3 = N2 + 1 cm or more) may be temporarily detected due to the fluctuation (wave) of the water surface. In such a case, the water storage level change determination unit 12 determines the water level detected most frequently during ΔT (the water storage level N2 in the example of the figure) as the water level after the change.

  5 and 6 show the case where the water storage level rises, the same applies to the case where it falls. In the case of descending, the above determination method may be applied to the graph in FIG. 5 that is axisymmetric with respect to the X axis.

  In the determination method as described above, the water storage level change detection unit 121 detects an instantaneous water storage change based on the measured value (water storage level data) of the water storage level input from the water level gauge 4. Here, the instantaneous change refers to the change from the reservoir level N1 to N2 (start of pulse) and the change from the reservoir level N2 to N1 (end of pulse) with respect to the pulses p1 to p4 in FIG. In the present embodiment, the accuracy of the water level gauge 4 is 1 cm. Therefore, the change in the water storage detected by the water storage level change detection unit 121 is also in 1 cm increments.

  The duration measuring unit 122 measures the duration of the stored water level after the change (the duration of each pulse) according to the detection of the change in the stored water level by the stored water level change detecting unit 121. The stored water level change timing determination unit 123 determines the timing at which the stored water level has changed. That is, the water storage level change timing determination unit 123 determines that the time (t2 + ΔT) in FIG. 5 has changed to the water storage level N2.

  Hereinafter, the processing procedure of the inflow amount calculation device 10 will be described. FIG. 7 is a flowchart for explaining the processing procedure of the inflow amount calculation processing by the inflow amount calculation device. FIG. 8 is a diagram for explaining the inflow amount calculation process. In FIG. 8, the same reference number is attached | subjected to the same water storage level or the same time as FIG. 5 or FIG. That is, FIG. 8 is a macro representation of changes in the reservoir level by reducing the scale of FIG. Therefore, in FIG. 8, the pulses (pulses p1 to p7, etc.) detected when the reservoir level changes are omitted.

  In response to the input of the inflow measurement start instruction, the reservoir level change determination unit 12 determines whether the value of ΔT has already been determined (S101). Since the value of ΔT is not determined immediately after the start of measurement, the process proceeds to step S102. In step S102, the water level change determination unit 12 uses the water level input from the water level meter 4 at the present time (measurement start time t0) and recorded in the measured value storage unit 14 by the data recording unit 11 as the reference water level. . The reference reservoir level means the reservoir level before the reservoir level changes. In FIG. 8, the reference water storage level is the water storage level N0.

  Subsequently, the water storage level change determination unit 12 performs a process of determining ΔT and the water level after the change (S103). Although details of step S103 will be described later, the timing of the change from the water level N1 to N2, the water level after the change (water level N2), and the value of ΔT are determined by the method described in FIG. The determined value is recorded in the data storage unit 15.

  Subsequent to step S103, the process proceeds to step S104, and the stored water level change determination unit 12 waits for a predetermined time. The waiting time here corresponds to an interval for measuring the inflow amount. Therefore, in operation, an interval for measuring the inflow amount may be applied to the predetermined time.

  After waiting for a predetermined time (Yes in S104), the water level change detection unit 121 of the water level change determination unit 12 determines whether the difference between the previous water level and the current water level is 1 cm or more (S105). Here, the previous reservoir level refers to the reservoir level determined at the time of the previous (recent) change in the reservoir level, and corresponds to the reservoir level N2 determined in step S103 in this description. On the other hand, the current water level is a water level that is input from the water level gauge 4 and recorded in the measured value storage unit 14 by the data recording unit 11 at the time of step S105. In the present embodiment, all the differences regarding the water storage level are absolute values. This is to cope with both cases where the water storage level rises and falls.

  When the difference between the previous storage level and the current storage level is 1 cm or more (Yes in S105), the duration measurement unit 122 measures the duration of the state where the difference between the previous storage level and the current storage level is 1 cm or more. To do. Specifically, the duration of the water level N3 or higher (N3 = N2 + 1 cm) in FIG. 8 is measured. When the duration continues for ΔT or more (Yes in S106), the reservoir level change timing determination unit 123 determines that the duration has reached ΔT as the current reservoir level change, and detects the most during the duration. The stored water level is determined as the current water level (S107). The water storage level change timing determination unit 123 records data indicating the determined current water storage level change and the current water storage level in the data storage unit 15. The water level detected most frequently during the duration is determined based on the water level data input from the water level gauge 4 during the duration and recorded in the measured value storage unit 14 together with the measurement time by the data recording unit. do it.

  In this description, step S107 is executed at time t3 + ΔT in FIG. Therefore, the storage water level change timing determination unit 123 determines the time t3 + ΔT as the current storage water level change time. Further, the water level N3 detected most frequently between time t3 and time t3 + ΔT is determined as the current water level.

  Subsequently, the inflow amount calculation unit 13 performs the previous storage level change (t2 + ΔT), the previous storage level (N2), the current storage level change (t3 + ΔT), the current storage level (N3), the storage level determination data, and the discharge facility 5. The inflow amount is calculated on the basis of the measured value (discharge data) of the discharge flow rate input from the data recording unit 11 and recorded in the measurement value storage unit 14 by the data recording unit 11 and the equation (1) (S108). More specifically, based on the previous storage level (N2), current storage level (N3), and storage level determination data, the effective storage amount (Vh [t−T]) at the time of the previous storage level change, at the time of the current storage level change The effective water storage amount (Vh [t]) at the time of calculating the current inflow amount is obtained. Further, the difference between the current water level change (t3 + ΔT) and the previous water level change (t2 + ΔT) is the time (T) required for the water level change (see FIG. 8). Further, the total discharge flow (Qot [t−i]) i minutes before the current inflow calculation is calculated based on the discharge flow data. The inflow amount calculation unit 13 calculates the inflow amount (the total inflow amount Qit) by applying these values to the equation (1). Therefore, the inflow amount from time t2 + ΔT to time t3 + ΔT is calculated here. The inflow amount calculation unit 13 records the inflow amount of the calculation result in the data storage unit 15 in association with the current time (as the inflow amount at the current time).

  Subsequently, the storage level change determination unit 12 updates ΔT based on the pulse detected in the process of changing from the previous storage level (N2) to the current storage level (N3) (S109). Specifically, the maximum duration among the pulses detected in the process of changing from the reservoir level N2 to the reservoir level N3 is set as a new ΔT. Note that step S109 may not be executed. That is, ΔT determined first may be used for subsequent determination of the stored water level change. However, by executing step S109, the value of ΔT can be made appropriate according to the change in the state of the reservoir 3.

  On the other hand, when it is determined in step S105 that the difference between the previous water storage level and the current water storage level is less than 1 cm (No in S105), the inflow amount calculation unit 13 calculates the next from the difference between the inflow amount and the discharge flow rate. The water storage level change time is calculated (S110). Here, the inflow amount is the inflow amount recorded in the data storage unit 15 at the time of the previous inflow amount calculation (when the previous step S108 is executed). Further, the discharge flow rate is a discharge flow rate that is input from the discharge facility 5 at the present time and recorded in the measured value storage unit 14 by the data recording unit 11. The next reservoir level change time is the time required for the change from the current reservoir level to the reservoir level of ± 1 cm. More specifically, when the inflow amount is greater than the discharge flow rate, it is the time for the storage level to change by +1 cm from the current storage level, and when the inflow amount is less than the discharge flow rate, it is the time for the storage level to change by -1 cm from the current storage level. .

  Specifically, the inflow amount calculation unit 13 obtains the water storage amount with respect to the current water storage level and the water storage amount with respect to the current water storage level ± 1 cm based on the water storage level determination data. Subsequently, the inflow amount calculation unit 13 calculates (predicts) the next storage water change time by dividing the difference between the two obtained water storage amounts by the difference between the inflow amount and the discharge flow rate.

  Subsequently, the inflow amount calculation unit 13 determines whether or not the difference between the current water level and the previous water level is 1 cm or more before the next water level change time elapses from the previous water level change ( S111, S112). That is, it is determined whether or not a change in the reservoir level of 1 cm or more has occurred as predicted or earlier than predicted. When the change in the water storage level of 1 cm or more occurs (Yes in S112), the processes after Step S101 are repeatedly executed. On the other hand, if there is no change in the reservoir level of 1 cm or more before the next reservoir level change time has elapsed since the previous reservoir level change (Yes in S111), the inflow amount calculation unit 13 The amount is determined to be the same value as the discharge flow rate, and the value of the discharge flow rate is recorded in the data storage unit 15 as the value of the inflow amount with respect to the current time (S113). That is, the inflow amount calculation unit 13 treats the amount as the same as the discharge flow rate when the water storage level does not change within the predicted time. Subsequently, the inflow amount calculation unit 13 deletes ΔT recorded in the data storage unit 15 (S114). This is to cause ΔT to be re-executed by the reservoir level change determination unit 12 because the value of ΔT may not be appropriate when the reservoir level does not change as predicted.

  Next, details of step S103 will be described. FIG. 9 is a flowchart for explaining the determination process of the storage level change confirmation time and the storage level change. This figure will be described with reference to FIG.

  In step S201, the water storage level change determination unit 12 initializes the value of ΔT to 0. Subsequently, the water level change detection unit 121 has a difference between the reference water level (N0) and the current water level input from the water level meter 4 and recorded in the measured value storage unit 14 by the data recording unit 11 is 1 cm or more. It is determined whether or not there is (S202). That is, it is determined whether or not the current water storage level is N1 cm or more. Step S202 is repeatedly executed until a state where the difference between the reference water storage level and the current water storage level is 1 cm or more is detected.

  When the water level change detecting unit 121 detects that the difference between the reference water level and the current water level is 1 cm (Yes in S202), the duration measuring unit 122 stores the water level (reference water level +1 cm or more) ( The measurement of the duration time of the water storage level of N1 or higher is started (S203). While the duration is measured by the duration measuring unit 122, the reservoir level change detecting unit 121 determines whether or not the current reservoir level has returned to the reference reservoir level (S204). When the water storage level change detection unit 121 detects that the current water storage level has returned to the reference water storage level (Yes in S204), the duration measurement unit 122 ends the measurement of the duration, and calculates the measured duration. Substitute for ΔT (S205). The phenomenon that the difference between the reference reservoir level and the current reservoir level is 1 cm (Yes in S202) and the current reservoir level is the same as the reference reservoir level (Yes in S204) is the occurrence of pulses p1 to p4 in FIG. It is a phenomenon observed by Therefore, when step S205 is first executed, the duration (1 minute) of the pulse p1 is substituted into ΔT.

  Subsequently, similarly to step S202, the water storage level change detection unit 121 continues to observe the current water storage level until the difference between the reference water storage level and the current water storage level becomes 1 cm or more (S206). When the water level change detecting unit 121 detects that the difference between the reference water level and the current water level is 1 cm (Yes in S206), the duration measuring unit 122 stores the water level (reference water level +1 cm or more) ( The measurement of the duration time of the water storage level of N1 or higher is started (S207). While the duration measurement is being performed by the duration measurement unit 122, the reservoir level change detection unit 121 determines whether the current reservoir level has returned to the reference reservoir level (S208), or the difference between the reference reservoir level and the current reservoir level. It is determined whether the difference is 2 cm or more (S209), or whether the difference is 2 cm or more continues for ΔT (minutes) (S210). Here, the case where the difference between the reference water level and the current water level is 2 cm or more means, for example, the case where the water level does not return from the water level N1 to N0 but changes to the water level N2. FIG. 5 shows a case where the start of the pulse p5 is detected.

  When the water storage level change detection unit 121 detects that the current water storage level has returned to the reference water storage level (Yes in S208), the duration measurement unit 122 ends the measurement of the duration, and the duration and ΔT Are compared (S211). When the duration is larger than ΔT (Yes in S211), the duration measurement unit 122 substitutes the duration for ΔT (S205). If the duration is less than ΔT (No in S211), ΔT is not updated. Thereafter, the processing after step S206 is repeated. Accordingly, the durations of the pulses p2, p3, and p4 in FIG. 5 are measured by the processes of S206 to S211. Further, ΔT is in a state where the duration of the pulse P4 is substituted.

  Even when the duration measurement unit 122 is measuring the duration, the reservoir level change detection unit 121 detects that the difference between the reference reservoir level and the current reservoir level is 2 cm or more (Yes in S209). ), When the difference is 2 cm or more does not continue for ΔT (No in S210 and No in S209), the loop of steps S208 to S210 is repeated. Therefore, the pulses p5, p6, and p7 are ignored by the processing in steps S208 to S210.

  On the other hand, when the difference is 2 cm or more continues for ΔT (Yes in S210), the water storage level change timing determination unit 123 determines ΔT and records it in the data storage unit 15 (S212). Subsequently, the water storage level change timing determination unit 123 determines the water level detected most during the period of ΔT as the water level after the change, and stores the data indicating the water level (water storage level data) as the data storage unit 15. (S213). Subsequently, the water storage level change determination unit records the current time in the data storage unit 15 as the water storage level change (S214).

  In the case of FIG. 5, steps S212 to S214 are executed at time t2 + ΔT.

  As described above, the inflow amount calculating device 10 according to the present embodiment determines the reservoir level change confirmation time (ΔT), and determines when the reservoir level changes using ΔT. Therefore, it is possible to increase the possibility that a pulse (water surface fluctuation) generated in the process of changing the reservoir level will not be determined as a change in the reservoir level used for calculating the inflow amount. That is, the time when the stored water level after the change is stable can be determined as the time when the stored water level changes. As a result, it becomes possible to appropriately measure the time required for the change in the water storage level, and it is possible to expect a reduction in inflow error.

  Further, by using ΔT, it is possible to determine the time when the water storage level changes at an early stage. In other words, in order to accurately determine the start time of the stable period of the stored water level after the change, the historical data of the measured value of the stored water level must be referred to. However, when using historical data, it takes time to determine when the reservoir level changes. As a result, the calculation of the inflow amount is not timely. According to this embodiment, since ΔT is used to determine the time when the reservoir level changes in a timely manner, such inconvenience can be appropriately eliminated.

  Further, since the most frequently detected water level in the period of ΔT is determined as the water level after the change, it is possible to eliminate the influence on the determination value of the water level due to the sudden generation of waves in the period of ΔT. .

  In addition, the inflow amount calculation device 10 of the present embodiment predicts the change time of the reservoir level based on the difference between the inflow amount and the discharge flow rate, and if the reservoir level does not change during the change time, the inflow amount is released. It is determined that the flow rate is the same. Therefore, the time when the inflow amount becomes the same as the discharge flow rate can be appropriately determined.

  Further, when the water storage level does not change during the change time, the determination of ΔT is forcibly re-executed. Accordingly, it is possible to appropriately correct the deterioration of the validity of ΔT due to a sudden change in the weather condition or the like.

  In addition, by appropriately calculating the amount of inflow, it is possible to grasp in advance the time for the monitoring staff to be alert.

  As mentioned above, although the Example of this invention was explained in full detail, this invention is not limited to such specific embodiment, In the range of the summary of this invention described in the claim, various deformation | transformation・ Change is possible.

Regarding the above description, the following items are further disclosed.
(Appendix 1)
A water level change detecting means for detecting a change in the water level based on a measured value input from a water level meter that measures the water level of the reservoir;
A duration measuring means for measuring a duration of the change in the reservoir level detected by the reservoir level change detecting means;
In the process of changing the reservoir level in a certain direction from the first reservoir level to the second reservoir level and from the second reservoir level to the third reservoir level, the first reservoir level to the second reservoir level. The maximum value of the duration time until the water level changes to the first reservoir level again is set as the reservoir level change confirmation time, and the duration of the third reservoir level reaches the reservoir level change confirmation time. A storage water level information processing device comprising: a storage water level change timing determination means for setting the time when the change has been made to the third water storage level.
(Appendix 2)
The storage water level information according to supplementary note 1, wherein the storage water level change timing determination means updates the storage water level change fixed time with the maximum value of the duration of the water storage level that changes after the change to the third water storage level. Processing equipment.
(Appendix 3)
The storage water level information processing apparatus according to appendix 1 or 2, wherein the storage water level change timing determination means determines the water storage level detected for the longest time within the water level change fixed time as the stored water level after the change.
(Appendix 4)
The reservoir based on the change of the reservoir level determined by the reservoir level change timing determination unit, the reservoir level measured at the time of the change, and the discharge flow rate of the reservoir input from the discharge rate measurement unit. An inflow amount calculating means for calculating the inflow amount to
The inflow amount calculating means calculates a change time of the reservoir level based on a difference between the inflow amount and the discharge flow rate,
The storage water level information processing unit according to any one of appendices 1 to 3, wherein the storage water level change timing determination unit resets the storage water level change determination time when a change in the water storage level is not detected within the change time. apparatus.
(Appendix 5)
On the computer,
A water level change detection procedure for detecting a change in the water level based on a measurement value input from a water level meter that measures the water level of the reservoir;
A duration measurement procedure for measuring a duration of change in the reservoir level detected in the reservoir level change detection procedure;
In the process of changing the reservoir level in a certain direction from the first reservoir level to the second reservoir level and from the second reservoir level to the third reservoir level, the first reservoir level to the second reservoir level. The maximum value of the duration until the first water level is returned to the first reservoir level is set as the reservoir level change confirmation time, and the duration of the third reservoir level is set to the reservoir level change confirmation time. A program for executing a water level change timing determination procedure in which the reached time is the time of change to the third water level.
(Appendix 6)
The program according to appendix 5, wherein the water level change timing determination procedure updates the water level change confirmation time with the maximum value of the duration of the water level that changes after the change to the third water level.
(Appendix 7)
The program according to appendix 5 or 6, wherein the water level change timing determination procedure determines the water level detected for the longest time within the water level change fixed time as the water level after change.
(Appendix 8)
The reservoir based on the change of the reservoir level determined by the reservoir level change timing determination unit, the reservoir level measured at the time of the change, and the discharge flow rate of the reservoir input from the discharge rate measurement unit. Has an inflow calculation procedure to calculate the inflow to
The inflow amount calculation procedure calculates a change time of the reservoir level based on a difference between the inflow amount and the discharge flow rate,
The program according to any one of appendices 5 to 7, wherein the water level change timing determination procedure sets the water level change confirmation time again when a change in the water level is not detected within the change time.

DESCRIPTION OF SYMBOLS 1 Dam monitoring and control equipment 2 Dam 3 Reservoir 4 Water level meter 5 Discharge equipment 10 Inflow amount calculation device 11 Data recording unit 12 Reservoir level change determination unit 13 Inflow amount calculation unit 14 Measurement value storage unit 15 and data storage unit 100 Drive device 101 Recording Medium 102 Auxiliary storage device 103 Memory device 104 CPU
105 Interface Device 106 Display Device 107 Input Device 121 Reservoir Level Change Detection Unit 122 Duration Measurement Unit 123 Reservoir Level Change Timing Determination Unit B Bus

Claims (5)

A water level change detecting means for detecting a change in the water level based on a measured value input from a water level meter that measures the water level of the reservoir;
A duration measuring means for measuring a duration of the change in the reservoir level detected by the reservoir level change detecting means;
In the process of changing the reservoir level in a certain direction from the first reservoir level to the second reservoir level and from the second reservoir level to the third reservoir level, the first reservoir level to the second reservoir level. The maximum value of the duration time until the water level changes to the first reservoir level again is set as the reservoir level change confirmation time, and the duration of the third reservoir level reaches the reservoir level change confirmation time. A storage water level information processing device comprising: a storage water level change timing determination means for setting the time when the change has been made to the third water storage level.   2. The storage water level according to claim 1, wherein the storage water level change timing determination means updates the storage water level change determination time with a maximum value of the duration of the water storage level that changes after the change to the third water storage level. Information processing device.   The reservoir level information processing apparatus according to claim 1 or 2, wherein the reservoir level change timing determination means determines the reservoir level detected for the longest time within the water level change confirmation time as the reservoir level after change. The reservoir based on the change of the reservoir level determined by the reservoir level change timing determination unit, the reservoir level measured at the time of the change, and the discharge flow rate of the reservoir input from the discharge rate measurement unit. An inflow amount calculating means for calculating the inflow amount to
The inflow amount calculating means calculates a change time of the reservoir level based on a difference between the inflow amount and the discharge flow rate,
The storage water level information according to any one of claims 1 to 3, wherein the storage water level change timing determination means sets the storage water level change confirmation time again when no change in the water storage level is detected within the change time. Processing equipment. On the computer,
A water level change detection procedure for detecting a change in the water level based on a measurement value input from a water level meter that measures the water level of the reservoir;
A duration measurement procedure for measuring a duration of change in the reservoir level detected in the reservoir level change detection procedure;
In the process of changing the reservoir level in a certain direction from the first reservoir level to the second reservoir level and from the second reservoir level to the third reservoir level, the first reservoir level to the second reservoir level. The maximum value of the duration until the first water level is returned to the first reservoir level is set as the reservoir level change confirmation time, and the duration of the third reservoir level is set to the reservoir level change confirmation time. A program for executing a water level change timing determination procedure in which the reached time is the time of change to the third water level.

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