Device and method for simulating artificial refilling of underground water in aquifer

Abstract

The invention belongs to the technical field of groundwater migration research, and particularly relates to an artificial aquifer groundwater refilling simulation device and method.The artificial aquifer groundwater refilling simulation device comprises a transparent model box, a soil body model is arranged in the model box, a permeable sand layer is arranged in the soil body model, and a monitoring assembly is arranged in the soil body model; the top of the soil body model is provided with a simulated river channel, and one side of the soil body model is provided with simulated seawater; the simulated river channel is communicated with a constant-flow water supply assembly and a constant-water-level water supply assembly, and the simulated seawater is communicated with a first regulation and control box. The change process of the underground water influence range can be visually and quantitatively analyzed, meanwhile, the simulated seawater is arranged on one side of the permeable sand layer, the process that salt water is displaced along with advancing of underground water refilling can be obtained, and the change of a salt-fresh water interface is analyzed.

Description

Technical Field

[0001] The present invention belongs to the technical field of groundwater migration research, and in particular relates to a device and method for simulating artificial recharge of groundwater in an aquifer. Background Art

[0002] In areas where groundwater is overexploited, the continued decline in groundwater levels not only exacerbates the contradiction between supply and demand of freshwater resources, but also triggers many geological disasters such as ground subsidence and ground fissures.

[0003] Groundwater recharge is an effective measure to systematically solve water supply security, restore water source extraction capacity, and improve the groundwater environment.

[0004] Most existing technologies are directly based on monitoring and evaluation of groundwater recharge by releasing water from rivers and other sources in field sites, which cannot intuitively analyze the changing process of the groundwater impact range. Therefore, there is an urgent need for a device and method for simulating artificial recharge of groundwater in aquifers. Summary of the Invention

[0005] The purpose of the present invention is to provide a device and method for simulating artificial recharge of groundwater in an aquifer to solve the above-mentioned problems.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] A device for simulating artificial recharge of groundwater in an aquifer comprises: a transparent model box, a soil model disposed within the model box, a permeable sand layer disposed within the soil model, a monitoring component disposed within the soil model, a simulated river channel disposed on the top of the soil model, and simulated seawater disposed on one side of the soil model;

[0008] The simulated river channel is connected to a constant flow water supply component and a constant water level water supply component, and the simulated seawater is connected to a first control box.

[0009] Preferably, the constant flow water supply includes a constant flow pump, the water inlet end of the constant flow pump is connected to an external water source, the water outlet end of the constant flow pump is connected to a first water supply pipeline, the first water supply pipeline extends into the simulated river channel, and a first valve is provided on the first water supply pipeline.

[0010] Preferably, the fixed water level water supply assembly includes a second regulating box, the water outlet of the second regulating box is connected to a second water pipeline, the second water pipeline extends into the simulated river channel, and a second valve is provided on the second water pipeline.

[0011] Preferably, the second control box includes a water tank, the water inlet of the water tank is connected to an external water source, the water tank is connected to the second water supply pipeline, and the water tank is provided with a water level regulating mechanism and a water level measuring mechanism.

[0012] Preferably, the water level regulating mechanism includes a lifting tube vertically slidably connected to the bottom wall of the water tank, the bottom end of the lifting tube passes through the water tank and is fixedly connected to a connecting plate, the connecting plate is threadedly connected to a screw, the screw is vertically arranged, and the top end of the screw is coaxially fixed with the output shaft of the lifting motor, and the lifting motor is fixed to the bottom wall of the water tank.

[0013] Preferably, the water level measuring mechanism includes a chute fixedly connected to the inner wall of the water tank, the chute is vertically arranged, a sensing belt is fixedly connected to the bottom of the chute, the sensing belt is arranged along the length direction of the chute, a slider is vertically slidably connected in the chute, the slider is arranged to sense the sensing belt, and the sensing belt signal is connected to an external controller.

[0014] Preferably, a fixing ring is fixed to the bottom wall of the water tank, and the fixing ring is sleeved on the outside of the lifting tube. A plurality of annular mounting grooves are circumferentially opened at the inner edge of the fixing ring, and the plurality of annular mounting grooves are arranged at equal intervals from top to bottom. A fixing belt is provided in the annular mounting groove, and a plurality of sealing belts are circumferentially fixed to one side of the fixing belt facing the lifting tube, and the plurality of sealing belts are in frictional contact with the lifting tube.

[0015] Preferably, the monitoring component includes a plurality of pressure / salinity monitoring probes, and the plurality of pressure / salinity monitoring probe arrays are distributed in the soil model.

[0016] A method for simulating artificial recharge of groundwater in an aquifer, based on the device for simulating artificial recharge of groundwater in an aquifer, comprises the following steps:

[0017] S1. Inject water mixed with tracers into the simulated river channel through a constant flow water supply component or a constant water level water supply component;

[0018] S2, monitoring the pressure and salinity in the soil model through the monitoring component, transmitting the data to the external controller, and observing the diffusion process of the tracer;

[0019] S3. Based on the obtained data analysis, the hydraulic influence range, solute influence range and changes in the salt-fresh water interface during the artificial groundwater recharge process are obtained.

[0020] Compared with the prior art, the present invention has the following advantages and technical effects:

[0021] When the present invention is in use, water mixed with a tracer is injected into a simulated river channel through a constant-flow water supply component or a constant-water-level water supply component, and the pressure changes and salinity changes in the soil model are monitored by the monitoring component. At the same time, through tracer observation, the changing process of the groundwater influence range can be intuitively and quantitatively analyzed. At the same time, simulated seawater is set on one side of the permeable sand layer, and the process of salt water being displaced as groundwater recharge advances can be obtained, thereby analyzing the changes in the salt-fresh water interface. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive work.

[0023] Figure 1 Schematic diagram of the overall structure of the device of the present invention;

[0024] Figure 2 for Figure 1 A partial enlarged view of point A in the middle;

[0025] Figure 3 Schematic diagram of the structure of the fixing ring in the present invention;

[0026] Among them, 1. Model box; 2. Soil model; 3. Simulated river channel; 4. Simulated seawater; 5. Fresh-salt water interface; 6. Water table; 7. Constant flow pump; 8. First water pipeline; 9. Second water pipeline; 10. Pressure / salinity monitoring probe; 11. First control box; 12. Second control box; 13. First valve; 14. Second valve; 15. Third valve; 16. Permeable sand layer; 1201. Water tank; 1202. Water inlet; 1203. Lifting pipe; 1204. Connecting plate; 1205. Screw; 1206. Lifting motor; 1207. Slide; 1208. Slider; 1209. Induction belt; 1210. Fixing ring; 1211. Annular mounting groove; 1212. Fixing belt; 1213. Sealing belt. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Reference Figures 1 to 3 The present invention discloses an artificial recharge simulation device for groundwater in an aquifer, comprising: a transparent model box 1, a soil model 2 disposed in the model box 1, a permeable sand layer 16 disposed in the soil model 2, a monitoring component disposed in the soil model 2, a simulated river channel 3 disposed on the top of the soil model 2, and simulated seawater 4 disposed on one side of the soil model 2;

[0030] The simulated river channel 3 is connected to a constant flow water supply component and a constant water level water supply component, and the simulated seawater 4 is connected to a first control box 11 .

[0031] To further optimize the solution, the constant flow water supply includes a constant flow pump 7, the water inlet end of the constant flow pump 7 is connected to an external water source, the water outlet end of the constant flow pump 7 is connected to a first water supply pipe 8, the first water supply pipe 8 extends into the simulated river channel 3, and a first valve 13 is provided on the first water supply pipe 8.

[0032] To further optimize the solution, the fixed water level water supply component includes a second control box 12, the water outlet of the second control box 12 is connected to a second water pipeline 9, the second water pipeline 9 extends into the simulated river channel 3, and a second valve 14 is provided on the second water pipeline 9.

[0033] To further optimize the solution, the second control box 12 includes a water tank 1201, a water inlet 1202 of the water tank 1201 is connected to an external water source, the water tank 1201 is connected to the second water supply pipeline 9, and a water level regulating mechanism and a water level measuring mechanism are provided on the water tank 1201.

[0034] A further optimized solution is that the water level regulating mechanism includes a lifting tube 1203 vertically slidably connected to the bottom wall of the water tank 1201, the bottom end of the lifting tube 1203 passes through the water tank 1201 and is fixedly connected to a connecting plate 1204, the connecting plate 1204 is threadedly connected to a screw 1205, the screw 1205 is vertically arranged, and the top end of the screw 1205 is coaxially fixed with the output shaft of the lifting motor 1206, and the lifting motor 1206 is fixedly connected to the bottom wall of the water tank 1201.

[0035] A further optimized solution is provided, in which the water level measuring mechanism includes a chute 1207 fixedly connected to the inner wall of the water tank 1201, the chute 1207 is vertically arranged, a sensing belt 1209 is fixedly connected to the bottom of the chute 1207, the sensing belt 1209 is arranged along the length direction of the chute 1207, a slider 1208 is vertically slidably connected in the chute 1207, the slider 1208 is arranged to sense with the sensing belt 1209, and the signal of the sensing belt 1209 is connected to an external controller.

[0036] A further optimized solution is provided, wherein a fixing ring 1210 is fixedly connected to the bottom wall of the water tank 1201, and the fixing ring 1210 is sleeved on the outside of the lifting pipe 1203. A plurality of annular mounting grooves 1211 are circumferentially opened at the inner edge of the fixing ring 1210, and the plurality of annular mounting grooves 1211 are arranged at equal intervals from top to bottom. A fixing belt 1212 is arranged in the annular mounting groove 1211, and a plurality of sealing belts 1213 are circumferentially fixed to the side of the fixing belt 1212 facing the lifting pipe 1203, and the plurality of sealing belts 1213 are all in friction contact with the lifting pipe 1203.

[0037] With such arrangement, the fixing ring 1210 makes the vertical lifting of the lifting tube 1203 more stable and less prone to deflection; the connection between the lifting tube 1203 and the fixing ring 1210 is sealed circumferentially by multiple sealing belts 1213, resulting in a better sealing effect.

[0038] The first regulating box 11 and the second regulating box 12 have the same structure.

[0039] According to a further optimized solution, the monitoring component includes a plurality of pressure / salinity monitoring probes 10 , and the plurality of pressure / salinity monitoring probes 10 are distributed in an array within the soil model 2 .

[0040] The external controller is electrically connected to the lifting motor 1206 , electrically connected to the pressure / salinity monitoring probe 10 , and electrically connected to the constant flow pump 7 .

[0041] With this arrangement, the changes in pressure and salinity in the soil model 2 can be monitored more intuitively.

[0042] A method for simulating artificial recharge of groundwater in an aquifer, based on an artificial recharge simulation device for groundwater in an aquifer, comprises the following steps:

[0043] S1, injecting water mixed with a tracer into the simulated river 3 through a constant flow water supply component or a constant water level water supply component;

[0044] S2, monitoring the pressure and salinity in the soil model 2 through the monitoring component, transmitting the data to the external controller, and observing the diffusion process of the tracer;

[0045] S3. Based on the obtained data analysis, the hydraulic influence range, solute influence range and changes in the salt-fresh water interface during the artificial groundwater recharge process are obtained.

[0046] Simulation process:

[0047] Construct a disjointed river model:

[0048] Prepare a transparent model box 1, construct a soil model 2 in the model box 1, and during the construction of the soil model 2, set a permeable sand layer 16 and multiple pressure / salinity monitoring probes 10 in the soil model 2. Multiple pressure / salinity monitoring probes 10 located on the same horizontal plane are divided into a group, and multiple pressure / salinity monitoring probes 10 in the same group are arranged in an array. Several groups of pressure / salinity monitoring probes 10 are arranged at equal intervals from top to bottom in the soil model 2. A simulated river channel 3 is constructed on the top surface of the soil model 2, and simulated seawater 4 is set on one side of the permeable sand layer 16. The first control box 11 is connected to the simulated seawater 4, and a third valve 15 is provided between the first control box 11 and the simulated seawater 4. The constant flow pump 7 is connected to the simulated river channel 3 through the first water supply pipe 8, and the second control box 12 is connected to the simulated river channel 3 through the second water supply pipe 9. The first water supply pipe 8 and the second water supply pipe 9 both penetrate into the bottom of the simulated river channel 3, and the construction is completed.

[0049] Use the constant flow infiltration method:

[0050] Close the second valve 14, and use the constant flow pump 7 to transport the external water source mixed with the tracer through the first water pipeline 8 to the simulated river channel 3. The flow rate of the constant flow pump 7 is always consistent. During this process, the pressure / salinity monitoring probe 10 monitors and records the pressure changes and salinity changes in the soil model 2. At the same time, through the observation of the tracer, the hydraulic influence range (indirect influence range) and the solute influence range (direct influence range) are intuitively displayed and quantitatively analyzed. At the same time, the setting of the simulated seawater 4 can observe and analyze the process of salt water being displaced as the backfill progresses, and analyze the changes in the salt and fresh water interface.

[0051] Choose the method of fixed water level infiltration:

[0052] Water mixed with a tracer is injected into the water tank 1201. The lifting motor 1206 drives the screw 1205 to rotate, which in turn drives the lifting tube 1203 up and down, thereby adjusting the water level in the water tank 1201. Under the buoyancy of the water, the slider 1208 slides in the chute 1207. At the same time, the slider 1208 generates induction with the sensor belt 1209 and transmits the data to the controller. The controller is electrically connected to the lifting motor 1206 to automatically control the water level in the water tank 1201.

[0053] Adjust the water level, open the second valve 14, close the first valve 13, and inject water into the simulated river channel 3. The water level in the simulated river channel 3 is always consistent with the water level in the water tank 1201 under the action of atmospheric pressure. During this process, the pressure / salinity monitoring probe 10 is used to monitor and record the pressure changes and salinity changes in the soil model 2. At the same time, through the observation of the tracer, the hydraulic influence range (indirect influence range) and the solute influence range (direct influence range) are intuitively displayed and quantitatively analyzed. At the same time, the setting of the simulated seawater 4 can observe and analyze the process of salt water being displaced as the backfill progresses, and analyze the changes in the salt and fresh water interface.

[0054] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0055] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A device for simulating artificial recharge of groundwater in an aquifer, characterized in that: include: A transparent model box (1) is provided with a soil model (2) in the model box (1), a permeable sand layer (16) in the soil model (2), a monitoring component in the soil model (2), a simulated river channel (3) on the top of the soil model (2), and simulated seawater (4) on one side of the soil model (2); The simulated river channel (3) is connected to a constant flow water supply component and a constant water level water supply component, and the simulated seawater (4) is connected to a first control box (11).

2. The artificial recharge simulation device for groundwater in an aquifer according to claim 1, characterized in that: The constant flow water supply comprises a constant flow pump (7), the water inlet end of the constant flow pump (7) is connected to an external water source, the water outlet end of the constant flow pump (7) is connected to a first water delivery pipe (8), the first water delivery pipe (8) extends into the simulated river channel (3), and a first valve (13) is provided on the first water delivery pipe (8).

3. The artificial recharge simulation device for groundwater in an aquifer according to claim 1, characterized in that: The fixed water level water supply assembly comprises a second regulating box (12), the water outlet end of the second regulating box (12) is connected to a second water delivery pipe (9), the second water delivery pipe (9) extends into the simulated river channel (3), and a second valve (14) is provided on the second water delivery pipe (9).

4. The artificial recharge simulation device for groundwater in an aquifer according to claim 3, characterized in that: The second regulating box (12) comprises a water tank (1201), a water inlet (1202) of the water tank (1201) is connected to an external water source, the water tank (1201) is connected to the second water supply pipeline (9), and a water level regulating mechanism and a water level measuring mechanism are provided on the water tank (1201).

5. The artificial recharge simulation device for groundwater in an aquifer according to claim 4, characterized in that: The water level regulating mechanism comprises a lifting tube (1203) vertically slidably connected to the bottom wall of the water tank (1201); the bottom end of the lifting tube (1203) passes through the water tank (1201) and is fixedly connected to a connecting plate (1204); the connecting plate (1204) is threadedly connected to a screw rod (1205); the screw rod (1205) is vertically arranged; the top end of the screw rod (1205) is coaxially fixedly connected to the output shaft of a lifting motor (1206); and the lifting motor (1206) is fixedly connected to the bottom wall of the water tank (1201).

6. The artificial recharge simulation device for groundwater in an aquifer according to claim 4, characterized in that: The water level measuring mechanism comprises a chute (1207) fixedly connected to the inner wall of the water tank (1201), the chute (1207) being vertically arranged, a sensing belt (1209) being fixedly connected to the bottom of the chute (1207), the sensing belt (1209) being arranged along the length direction of the chute (1207), a slider (1208) being vertically slidably connected in the chute (1207), the slider (1208) being arranged to sense the sensing belt (1209), and the sensing belt (1209) being signal-connected to an external controller.

7. The artificial recharge simulation device for groundwater in an aquifer according to claim 5, characterized in that: A fixing ring (1210) is fixedly connected to the bottom wall of the water tank (1201), and the fixing ring (1210) is sleeved on the outside of the lifting tube (1203). A plurality of annular mounting grooves (1211) are circumferentially opened at the inner edge of the fixing ring (1210), and the plurality of annular mounting grooves (1211) are arranged at equal intervals from top to bottom. A fixing belt (1212) is arranged in the annular mounting groove (1211), and a plurality of sealing belts (1213) are circumferentially fixed to one side of the fixing belt (1212) facing the lifting tube (1203), and the plurality of sealing belts (1213) are in frictional contact with the lifting tube (1203).

8. The artificial recharge simulation device for groundwater in an aquifer according to claim 1, characterized in that: The monitoring component comprises a plurality of pressure / salinity monitoring probes (10), and the plurality of pressure / salinity monitoring probes (10) are distributed in an array within the soil model (2).

9. A method for simulating artificial recharge of groundwater in an aquifer, based on the device for simulating artificial recharge of groundwater in an aquifer according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1, injecting water mixed with a tracer into the simulated river channel (3) through a constant flow water supply component or a constant water level water supply component; S2, monitoring the pressure and salinity in the soil model (2) through the monitoring component, transmitting the data to an external controller, and observing the diffusion process of the tracer; S3. Based on the obtained data analysis, the hydraulic influence range, solute influence range and changes in the salt-fresh water interface during the artificial groundwater recharge process are obtained.

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