Well Monitoring Systems and Programs

Abstract

This well monitoring system (1) monitors three or more wells (2A, 2B, 2C). The well monitoring system (1) includes a server (4) that stores or receives position information pertaining to the wells (2A, 2B, 2C) and that receives water level information pertaining to the wells (2A, 2B, 2C). The server (4) is configured to execute, on the basis of the position information and water level information pertaining to the wells (2A, 2B, 2C), a flow direction analysis process for analyzing the flow direction state of underground water.

Description

[Technical Field]

[0001] FIELD OF THE DISCLOSURE The present disclosure relates to well monitoring systems and monitoring programs. [Background technology]

[0002] For example, Patent Document 1 proposes a remediation method for purifying soil in an underground area contaminated with harmful substances. The remediation method described in Patent Document 1 includes a transfer step in which the underground area is stirred and kneaded to transfer cyanide compounds contained in the soil in the underground area into groundwater. The remediation method also includes a pumping step in which groundwater is pumped from the underground area after the transfer step. The remediation method also includes a cyanide-decomposing step in which cyanide-decomposing microorganisms are added to the groundwater pumped in the pumping step and cultured in a tank. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-47360 Summary of the Invention [Problem to be solved by the invention]

[0004] For example, when pumping groundwater, the flow direction of the groundwater in the underground area where the pumping is performed can be controlled. In this case, the pumped groundwater needs to be treated appropriately. However, when treating pumped groundwater, there is a limit to the amount or speed of treatment. This is because the capacity of the equipment used to treat the pumped groundwater is limited. [Means for solving the problem]

[0005] A well monitoring system according to one embodiment of the present disclosure monitors three or more wells. The well monitoring system includes a server configured to store or acquire location information for each of the locations where the wells are installed and to acquire water level information for each of the wells. The server is configured to acquire the water level information for each of the wells from equipment in each of the wells, and to include a flow direction analysis process that analyzes groundwater flow directions in underground areas surrounding the wells based on the location information and water level information for the wells.

[0006] A monitoring program according to one aspect of the present disclosure is a control program executed by a computer included in the server of the well monitoring system, the monitoring program being configured to cause the computer to execute the flow direction analysis process. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a schematic diagram of a well monitoring system. [Figure 2] This is a schematic diagram showing the relationship between multiple wells and aquifers on a map. [Figure 3] FIG. 2 is a schematic diagram showing the configuration of a water pumping facility. [Figure 4] FIG. 1 is a schematic diagram showing the configuration of the observation equipment. [Figure 5] FIG. 1 is a schematic diagram showing the relationship between the relative positions of multiple wells and the flow direction of groundwater. [Figure 6] 10 is a flowchart illustrating a flow direction calculation process executed by a server of the well monitoring system. [Figure 7] 6 is a schematic diagram illustrating the flow direction calculation process of FIG. 5. FIG. [Figure 8] 10 is a flowchart illustrating the drive control process executed by the server of the well monitoring system. DETAILED DESCRIPTION OF THE INVENTION

[0008] A well monitoring system 1 according to one embodiment will be described. As shown in Figure 1, the well monitoring system 1 includes a plurality of wells 2, a plurality of facilities 3, and a server 4. Each of the facilities 3 is connected to the server 4 via a network 5 such as the Internet. For ease of explanation, the example shows a case where the well monitoring system 1 monitors three wells.

[0009] <About multiple wells 2> As shown in Figure 1, well 2 includes pumping well 2A and two observation wells 2B and 2C. Pumping well 2A is a well for pumping groundwater from an underground region. The two observation wells 2B and 2C are wells for observing the groundwater level in the underground region.

[0010] For example, as shown in FIG. 2, wells 2A, 2B, and 2C are installed above the same aquifer 11 in the underground area indicated by the dashed line in the figure. Wells 2A, 2B, and 2C are installed at a predetermined interval. The distribution range of aquifer 11 is estimated using typical techniques, such as surface geological surveys, geological surveys such as drilling surveys, electrical prospecting, and water quality surveys including ion analysis, or a combination thereof. The same applies to the installation intervals of wells 2A, 2B, and 2C. Observation wells 2B and 2C monitor the state of the groundwater level as the state of aquifer 11. The state of the groundwater level changes due to natural environmental factors such as the season and weather, as well as the influence of pumping at pumping well 2A.

[0011] <Regarding multiple facilities 3> The facility 3 includes a pumping facility 3A and two observation facilities 3B and 3C. The pumping well 2A is installed next to the pumping facility 3A. The observation well 2B is installed next to the observation facility 3B. The observation well 2C is installed next to the observation facility 3C.

[0012] As shown in Fig. 3, the pumping equipment 3A includes a pump 21, a tank 22, and a control device 23. The pump 21 pumps up groundwater from a pumping well 2A. The tank 22 stores the groundwater pumped up by the pump 21. The control device 23 controls the operation of the pump 21.

[0013] The pump 21 is, for example, an electric pump driven by a motor 24. The pump 21 may be a type installed on land or a type that is submerged. The pump 21 may also be a pump driven by another method, such as an engine. The pump 21 pumps groundwater from the pumping well 2A via a lifting pipe 25 and delivers the pumped groundwater to the tank 22 via a connecting pipe 26. The lifting pipe 25 extends from the pump 21 through the pumping well 2A and has its tip submerged in the water in the pumping well 2A. The groundwater stored in the tank 22 is delivered, for example, via a delivery pipe 27 to a facility such as a factory (not shown) for appropriate treatment.

[0014] The control device 23 is a circuit made up of a PLC (Programmable Logic Controller). The control device 23 includes a CPU 31, a memory 32, and a communication unit 33. The control device 23 performs various processes by having the CPU 31 execute programs stored in the memory 32. The CPU 31 and the memory 32 constitute a microcomputer, which is a processing circuit. The memory 32 includes computer-readable media such as a RAM (Random Access Memory) and a ROM (Read Only Memory). However, it is one example that various processes are realized by software. The processing circuit of the control device 23 may be configured to realize at least a part of the processes by a hardware circuit such as a logic circuit.

[0015] The communication unit 33 is a communication circuit that sends and receives signals to and from the server 4 via the network 5. The communication unit 33 transmits well information about the pumping well 2A to the server 4 at predetermined intervals, for example, every few tens of seconds to every few minutes. The communication unit 33 receives and acquires, for example, an instruction signal to drive the pump 21, a signal to stop the pump 21, and various other instruction signals from the server 4 via the network 5.

[0016] The control device 23 controls the operation of the pump 21 by supplying driving power to the motor 24 based on an instruction signal received via the communication unit 33. The control device 23 acquires information obtained from various sensors provided in the pumping equipment 3A, and transmits the information to the server 4 via the communication unit 33 as well information related to the pumping well 2A.

[0017] The various sensors include a water level sensor 41, a flow rate sensor 42, a current sensor 43, and a water storage volume sensor 44. The water level sensor 41 detects the water level Hwa of the pumping well 2A. The flow rate sensor 42 detects the flow rate Qw of the groundwater pumped by the pump 21. The control device 23 detects the groundwater pumping volume Pw per unit time based on the flow rate Qw obtained via the flow rate sensor 42. In this case, the control device 23 may take into account parameters that change in relation to the operation and / or stoppage of the pump 21, such as the operation and / or stoppage times of the pump 21. The current sensor 43 detects the current Im supplied to the motor 24. The water storage volume sensor 44 detects the water storage volume Nw in the tank 22 based on the water level of the groundwater stored in the tank 22.

[0018] The well information includes water level information, pumping volume information, and water storage volume information. The water level information is the detection result of the water level Hwa of the pumping well 2A. The pumping volume information is the detection result of the pumping volume Pw of the pumping well 2A. The water storage volume information is the detection result of the water storage volume Nw. Note that location information regarding the location where the pumping well 2A is installed is pre-stored in the memory 72 of the server 4. The location information includes the latitude and longitude of the location where the pumping well 2A is installed.

[0019] As shown in Fig. 4, the observation facility 3B includes a communication unit 53B. Similar to the communication unit 33, the communication unit 53B is a communication circuit that transmits and receives signals to and from the server 4 via the network 5. The communication unit 53B transmits well information about the observation well 2B to the server 4 at predetermined intervals, for example, every several tens of seconds to several minutes. The communication unit 53B receives and acquires, for example, a request signal requesting the well information, etc., from the server 4 via the network 5.

[0020] The communication unit 53B acquires information obtained from various sensors installed in the observation facility 3B and transmits the information to the server 4 as well information regarding the observation well 2B. The various sensors include a water level sensor 61B. The water level sensor 61B detects the water level Hwb of the observation well 2B. The well information includes water level information. The water level information is the detection result of the water level Hwb of the observation well 2B. Note that location information regarding the point where the observation well 2B is installed is pre-stored in the memory 72 of the server 4. The location information includes the latitude and longitude of the point where the observation well 2B is installed. Since the observation facility 3C has the same configuration as the observation facility 3B, the symbols of the corresponding components are simply added as parenthesized symbols in Figure 4 and their explanation is omitted.

[0021] <About Server 4> As shown in Figures 1, 3, and 4, the server 4 is, for example, a stationary server. The server 4 may also be a cloud server virtually constructed on the network 5. The server 4 includes a CPU 71 and a memory 72. The server 4 performs various processes by having the CPU 71 execute a monitoring program, which is a control program stored in the memory 72. The server 4 exchanges signals with each of the facilities 3A, 3B, and 3C via the network 5. The server 4 receives and acquires well information about each of the wells 2A, 2B, and 2C at predetermined intervals, for example, from several tens of seconds to several minutes.

[0022] The server 4 stores the well information transmitted from the communication units 33, 53B, and 53C of each of the facilities 3A, 3B, and 3C in the memory 72. The server 4 transmits an instruction signal to the communication unit 33 to the control device 23 of the pumping facility 3A. Based on the well information stored in the memory 72, the server 4 generates and transmits an instruction signal to the control device 23 and a request signal to the communication units 53B and 53C. In other words, in this embodiment, the server 4 can remotely control each of the facilities 3A, 3B, and 3C.

[0023] The CPU 71 and memory 72 of the server 4 constitute a microcomputer, which is a processing circuit. The various processes executed by the server 4 are functional parts realized by the CPU 71 executing a monitoring program. The various processes include, for example, flow direction analysis processing and drive control processing. The memory 72 includes computer-readable media such as RAM (Random Access Memory) and ROM (Read Only Memory). However, realizing the various processes by software is one example. The processing circuit possessed by the server 4 may be configured to realize at least a part of the processes by hardware circuits such as logic circuits.

[0024] <Regarding Server 4 processing> For example, as shown in FIG. 5, wells 2A, 2B, and 2C are installed within a specific site 12, indicated by a dashed line in the figure. Site 12 is adjacent to adjacent land 13, which is separated by a boundary R in the figure, such as another site or a river. In this case, the groundwater flow direction, which indicates the direction of groundwater flow within site 12, can change in various directions in addition to the direction indicated by the arrow in the figure. For example, if the groundwater flow direction is in the direction indicated by the arrow in the figure, this indicates that there is a possibility that groundwater within site 12 will leak into adjacent land 13. Therefore, in order to prevent groundwater within site 12 from leaking into adjacent land 13, server 4 executes various processes, including a flow direction analysis process and a drive control process, for analyzing the groundwater flow direction and controlling the groundwater flow direction.

[0025] <About flow direction analysis processing> The flow direction analysis process shown in Fig. 6 is a process for analyzing the flow direction state of groundwater within the site 12. The server 4 executes the flow direction analysis process in the following order at each predetermined cycle.

[0026] In the flow direction analysis calculation process, the server 4 calculates a virtual center of gravity G of the groundwater level surface estimated from the water levels of each well 2A, 2B, 2C based on the position information and water level information for each well 2A, 2B, 2C (step S10). In step S10, the server 4 calculates the virtual center of gravity G based on the distance between the points of the wells 2A, 2B, 2C and each water level Hwa, Hwb, Hwc.

[0027] For example, as shown in FIG. 7, the server 4 calculates three virtual points P1, P2, and P3 as points on a virtually defined three-dimensional coordinate system. The virtual point P1 corresponds to the pumping well 2A. The virtual point P1 is obtained by considering the water level Hwa for the coordinate Z1 corresponding to the location of the pumping well 2A on the map. The virtual point P2 corresponds to the observation well 2B. The virtual point P2 is obtained by considering the water level Hwb for the coordinate Z2 corresponding to the location of the observation well 2B on the map. The virtual point P3 corresponds to the observation well 2C. The virtual point P3 is obtained by considering the water level Hwc for the coordinate Z3 corresponding to the location of the observation well 2C on the map. Note that when the water levels Hwa, Hwb, and Hwc of the corresponding wells 2A, 2B, and 2C change, the virtual points P1, P2, and P3 change vertically, i.e., up and down in the figure, while the coordinates corresponding to the locations on the map remain unchanged. Then, the server 4 calculates a virtual center of gravity G, which is the center of gravity of the virtual points P1, P2, and P3.

[0028] Next, the server 4 calculates a water level surface Fw, which is a virtual plane obtained by connecting the virtual points P1, P2, and P3 calculated in step S10 (step S12). In step S12, the server 4 calculates a triangular portion of the plane including all of the virtual points P1, P2, and P3, which is surrounded by lines connecting the virtual points P1, P2, and P3, as the water level surface Fw.

[0029] 7, when the water levels Hwa, Hwb, and Hwc are all equal, the server 4 calculates the water level surface Fw as the horizontal plane Fh shown by the two-dot chain line in the figure. Furthermore, when the water levels Hwa, Hwb, and Hwc are different from one another, the server 4 calculates the water level surface Fw as the inclined plane Fin shown by the solid line in the figure. Note that when the virtual points P1, P2, and P3 change with the change in water level, the inclination direction of the water level surface Fw and the surface area of ​​the water level surface Fw may change.

[0030] Next, the server 4 calculates a resultant vector Vcom indicating the direction and magnitude of the gradient of the water level surface Fw based on the virtual center of gravity G and the water level surface Fw calculated in steps S10 and S12, respectively (step S14). In step S14, the server 4 calculates the resultant vector Vcom by calculating three vectors V1, V2, and V3 indicating the direction and magnitude of the gradient of the water level surface Fw between the virtual center of gravity G and each of the three virtual points P1, P2, and P3.

[0031] For example, as shown in FIG. 7, the server 4 calculates three vectors V1, V2, and V3, indicated by dashed lines in the figure, at the virtual center of gravity G of the inclined surface Fin. The directions of the vectors V1, V2, and V3 indicate the direction of the gradient of the water level surface Fw, and the magnitudes of the vectors V1, V2, and V3 indicate the magnitude, i.e., strength, of the gradient of the water level surface Fw. Vector V1 indicates the direction and magnitude of the gradient of the water level surface Fw between the virtual center of gravity G and a virtual point P1. Vector V2 indicates the direction and magnitude of the gradient of the water level surface Fw between the virtual center of gravity G and a virtual point P2. Vector V3 indicates the direction and magnitude of the gradient of the water level surface Fw between the virtual center of gravity G and a virtual point P3. The server 4 then calculates a resultant vector Vcom, indicated by a solid line in the figure, obtained by combining the vectors V1, V2, and V3. The resultant vector Vcom thus obtained indicates the direction and magnitude of the gradient of the inclined surface Fin. That is, the resultant vector Vcom indicates the water level gradient of the water level surface Fw.

[0032] Next, the server 4 analyzes the flow direction of the groundwater based on the resultant vector Vcom calculated in step S14 (step S16). In step S16, the server 4 analyzes the flow direction of the groundwater based on the direction and magnitude of the resultant vector Vcom.

[0033] For example, as shown in Fig. 7, when the server 4 calculates a resultant vector Vcom extending from the virtual center of gravity G in a direction away from the virtual point P1, it analyzes that the groundwater is flowing in the direction indicated by the arrow in Fig. 5. This indicates that there is a possibility that the groundwater within the site 12 will overflow the boundary R and flow into the adjacent land 13. The magnitude of the resultant vector Vcom indicates the strength of the groundwater flow, i.e., the flow velocity.

[0034] <About drive control processing> 8 is a process for driving and controlling the pump 21 to adjust the pumping rate Pw in the pumping well 2A. The server 4 executes the drive control process in the following order at each predetermined cycle.

[0035] In the drive control process, the server 4 calculates a target water level Hwt for the water level Hwa of the pumping well 2A based on the groundwater flow direction state obtained as a result of the flow direction analysis process shown in Fig. 6 (step S20). In step S20, the server 4 calculates a target water level Hwt for changing the current water level Fw in order to change the current flow direction state.

[0036] For example, as shown in FIG. 7, when the server 4 calculates the target water level Hwt so that the inclined surface Fin becomes a plane parallel to the horizontal plane Fh, it changes the resultant vector Vcom to a zero vector. When the server 4 calculates the target water level Hwt so that the inclined surface Fin slopes downward toward the virtual point P1, it changes the resultant vector Vcom so that it extends from the virtual center of gravity G toward the virtual point P1. In other words, the server 4 changes the current groundwater flow direction so that groundwater does not flow from the site 12 across the boundary R into the adjacent land 13. The server 4 may have a map that defines the relationship between the water level Hwa and a characteristic value obtained by parameterizing the groundwater flow direction, and the target water level Hwt. In this case, the server 4 calculates the target water level Hwt using the water level Hwa and the characteristic value as inputs. The map may further include water levels Hwb and Hwc as inputs. Multiple maps may be prepared so that a map can be selected according to natural conditions such as the season or weather.

[0037] Next, the server 4 calculates the pumping rate Pw required to bring the water level Hwa of the pumping well 2A to the target water level Hwt calculated in step S20, based on the pumping rate information for the pumping well 2A (step S22).

[0038] Next, the server 4 drives and controls the pump 21 to adjust the pumping rate Pw in the pumping well 2A to the pumping rate Pw calculated in step S22 (step S24). In step S24, the server 4 instructs the pump 21 to drive or stop so as to increase or decrease the pumping rate Pw depending on the magnitude of the deviation of the current water level Hwa from the target water level Hwt. In this case, the server 4 transmits an instruction signal to the communication unit 33 for the control device 23.

[0039] <Operation of this embodiment> According to the above configuration, the server 4 can analyze the current flow direction state of the groundwater in the underground area around the wells 2A, 2B, and 2C by executing the flow direction analysis process.

[0040] For example, as shown in FIG. 5, if there is a possibility that groundwater within the site 12 will overflow over the boundary R into the adjacent land 13, the server 4 determines that it is necessary to change the current flow direction of the groundwater to control the flow direction of the groundwater. The server 4 executes a drive control process to adjust the pumping rate Pw of the pumping well 2A. In this case, the server 4 can adjust the pumping rate Pw so as to change the current flow direction of the groundwater so that the groundwater within the site 12 will not overflow over the boundary R into the adjacent land 13. In other words, the server 4 can appropriately adjust the pumping rate Pw of the pumping well 2A in order to control the flow direction of the groundwater.

[0041] <Effects of the embodiment> (1) In order to control the direction of groundwater flow, the server 4 can adjust the pumping rate Pw while monitoring the current flow direction of the groundwater. In other words, the amount of groundwater pumped from the pumping well 2A can be optimized. In this case, the limitations on the capacity of the equipment used to treat the pumped groundwater can be alleviated. Therefore, the burden of treating the pumped groundwater can be reduced.

[0042] (2) The server 4 analyzes the groundwater flow direction based on water level information obtained from the water level sensors 41, 61B, and 61C of each well 2A, 2B, and 2C. The water level sensors 41, 61B, and 61C are necessary for periodic inspection or maintenance of each well 2A, 2B, and 2C. Therefore, the configuration required to control the groundwater flow direction can be used in conjunction with configurations used for other purposes. This reduces the scale of changes required to the configuration of the well monitoring system 1 to control the groundwater flow direction.

[0043] (3) The server 4 calculates a resultant vector Vcom as a water level gradient to analyze the groundwater flow direction. Such a resultant vector Vcom can quantitatively represent the groundwater flow direction. This is effective in facilitating the analysis of the groundwater flow direction.

[0044] (4) The server 4 calculates the resultant vector Vcom using the virtual center of gravity G. In this case, it is not necessary to consider the differences in distance between the virtual center of gravity G and the three virtual points P1, P2, and P3. This is effective in simplifying the calculation.

[0045] (5) The server 4 can change the current groundwater flow direction to a desired state by adjusting the pumping rate Pw in the pumping well 2A to increase or decrease it. On the other hand, if the current groundwater flow direction can be maintained because the current groundwater flow direction is the desired state, the server 4 can adjust the pumping rate Pw in the pumping well 2A to decrease it or stop the pump 21. This makes it possible to minimize the amount of pumping required to control the groundwater flow direction in the pumping well 2A.

[0046] <Other embodiments> The above embodiment may be modified as follows: In addition, the following other embodiments may be combined with each other within the scope of technical compatibility.

[0047] For example, in the example of Figure 5, the server 4 may change the current flow direction of groundwater so that the desired state is one in which groundwater is less likely to flow from the site 12 across the boundary R to the adjacent land 13 than in the current flow direction. In this case, the server 4 may adjust the pumping rate Pw of the pumping well 2A to increase or decrease, taking into account the state of the pumping equipment 3A, such as the pumping rate information and / or the water storage amount Nw in the tank 22. This is effective in optimizing the amount of groundwater pumped from the pumping well 2A.

[0048] The server 4 may receive and acquire the location information of each of the wells 2A, 2B, and 2C from an external source. Each of the facilities 3A, 3B, and 3C may transmit its location information to the server 4. For example, each of the facilities 3A, 3B, and 3C may be equipped with a GPS sensor or the like. In this case, the server 4 may or may not store the location information of each of the wells 2A, 2B, and 2C in advance in the memory 72.

[0049] The network 5 may be substituted with a wireless communication function that uses radio waves in a frequency band of about several GHz. In the flow direction analysis process, the process of step S10 for calculating the virtual center of gravity G may be omitted. For example, instead of calculating the virtual center of gravity G, the server 4 may fix coordinates corresponding to a predetermined point on the map within the site 12 and calculate the intersection of the building line extending in the vertical direction including the coordinates and the water level surface Fw. The server 4 may also calculate multiple points as points to be calculated instead of the virtual center of gravity G. In this case, the resultant vectors obtained for each point may be further combined to calculate a final resultant vector.

[0050] In the flow direction analysis process, the method for calculating the water level surface Fw can be changed as appropriate. For example, instead of calculating the virtual points P1, P2, and P3, the server 4 may calculate a horizontal plane according to the water level of the coordinate with the lowest water level among the coordinates Z1, Z2, and Z3. Then, the server 4 may calculate the water level surface Fw by changing the inclination of the horizontal plane according to the water levels of the remaining coordinates.

[0051] The order of the steps in the flow direction analysis process can be changed as appropriate, for example, by switching the order of step S10 and step S12. In the drive control process, step S20, which calculates the target water level Hwt, may be omitted. For example, the server 4 may monitor the groundwater flow direction obtained as a result of the flow direction analysis process and adjust the pumping rate Pw so that the flow direction is the desired state. In this case, excess pumping in the pumping well 2A can be reduced compared to when the pumping rate Pw is not adjusted.

[0052] In the drive control process, when adjusting the pumping amount Pw, the server 4 may only transmit information on the required pumping amount Pw. For example, specific control of driving and stopping the pump may be mainly performed by the control device 23.

[0053] In the well monitoring system 1, the server 4 only needs to perform at least the flow direction analysis process. For example, the drive control process may be configured as a process executed by the control device 23. In this case, the control device 23 does not need to transmit pumping volume information to the server 4.

[0054] The configuration of the pumping equipment 3A can be modified as appropriate, for example, by removing the tank 22. Furthermore, in the pumping equipment 3A, for example, if the flow rate when the pump 21 is driven is fixed, the flow rate sensor 42 can be removed. In this case, the control device 23 can estimate the pumping amount Pw from the driving time and / or driving frequency of the pump 21.

[0055] The wells 2A, 2B, and 2C monitored by the well monitoring system 1 do not all have to be located on the same aquifer 11. For example, the wells 2A, 2B, and 2C may include wells located on different aquifers.

[0056] The well monitoring system 1 may monitor three or more observation wells. For example, if three observation wells are to be monitored, the server 4 may select two of the three observation wells and use the combination of the selected two observation wells and the pumping well 2A as an information source for flow direction analysis processing, etc. In this case, three combinations of a pumping well and two observation wells can be extracted. For example, the server 4 may calculate a composite vector for each of the three combinations and further combine the composite vectors obtained from the three combinations to obtain the final composite vector Vcom.

[0057] The well monitoring system 1 may monitor two or more pumping wells. For example, when two pumping wells are monitored, the server 4 may use a combination of the two pumping wells and one observation well selected from two observation wells as an information source for flow direction analysis processing, etc. In this case, the target of drive control through the drive control processing may be either one or both of the two pumping wells.

[0058] The well monitoring system 1 may monitor three or more observation wells, excluding pumping wells. For example, when three observation wells are monitored, the server 4 uses the three observation wells as information sources for flow direction analysis processing, etc.

[0059] The well monitoring system 1 only needs to include at least the server 4. For example, the well 2 or the facility 3 to be monitored may be omitted from the configuration of the well monitoring system 1.

Claims

1. A well monitoring system for monitoring a plurality of wells, the number of which is three or more, comprising: the plurality of wells includes one pumping well and two observation wells; a server configured to store or acquire location information regarding each of the locations where the plurality of wells are installed and to acquire water level information regarding the water levels of each of the plurality of wells; The server Acquire the water level information regarding the water levels of the wells from the facilities of each of the plurality of wells; a flow direction analysis process for analyzing a flow direction indicating a flow direction of groundwater in an underground area around the plurality of wells based on the position information and the water level information for the plurality of wells; The flow direction analysis process includes: A process of calculating a water level gradient, which is a gradient of the groundwater water level, from the points of the plurality of wells indicated by the position information and the water levels of the plurality of wells indicated by the water level information; and analyzing the flow direction state based on the water level gradient, The process of calculating the water level gradient includes: A process of calculating three virtual points virtually defined by the respective points of the one pumping well and the two observation wells and the respective water levels of the one pumping well and the two observation wells; and calculating the gradient of a virtual plane obtained by connecting the three virtual points as the water level gradient, The process of calculating the water level gradient includes: A process of calculating a virtual center of gravity of the three virtual points; a process of calculating three vectors indicating the direction and magnitude of the gradient of the virtual plane between the virtual center of gravity and each of the three virtual points; A well monitoring system including a process of calculating a resultant vector obtained by combining the three vectors as the water level gradient.

2. The server obtaining, from the pumping equipment, pumping volume information relating to a pumping volume, which is the volume of groundwater pumped from the pumping well by the pumping equipment; The well monitoring system described in claim 1 includes a drive control process that controls the pumping equipment to adjust the pumping volume based on the flow direction state obtained as a result of the flow direction analysis process and the acquired pumping volume information.

3. The drive control process includes: A process of calculating a target water level of the pumping well in order to change the flow direction state obtained as a result of the flow direction analysis process; The well monitoring system of claim 2, further comprising a process of adjusting the pumping rate based on the pumping rate information so that the water level in the pumping well reaches the target water level.

4. The pumping equipment that pumps groundwater from the pumping well is a pump configured to pump groundwater from the pumping well; a water level sensor configured to detect a water level in the pumping well; a communication unit configured to transmit the detection result of the water level sensor to the server as the water level information, The observation equipment for detecting the water level of the observation well is a water level sensor configured to detect the water level of the observation well; A well monitoring system as described in any one of claims 1 to 3, further comprising a communication unit configured to transmit the detection results of the water level sensor to the server as the water level information.

5. A monitoring program executed by a computer included in the server of the well monitoring system according to any one of claims 1 to 4, A monitoring program configured to cause the computer to execute the flow direction analysis process.

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