CN209894806U - Groundwater recharge simulation experiment platform - Google Patents
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- CN209894806U CN209894806U CN201920437791.2U CN201920437791U CN209894806U CN 209894806 U CN209894806 U CN 209894806U CN 201920437791 U CN201920437791 U CN 201920437791U CN 209894806 U CN209894806 U CN 209894806U
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Abstract
The utility model discloses an groundwater anaplerosis simulation experiment platform, experiment platform include dynamic water level analogue means, package gas zone analogue means, rainfall irrigation analogue means and groundwater anaplerosis analogue means. Different pollution sources are added into the aeration zone simulation device, the evolution of the underground water flow field in the recharging process is simulated, various influence factors of potential polluted underground water quality in the groundwater recharging process are simulated in the pollution correlation simulation device, and various key parameters are obtained.
Description
Technical Field
The utility model relates to a groundwater quality of water safety and benefit technical field especially relate to a groundwater benefit simulation experiment platform.
Background
In hydrogeology, the aeration zone refers to the geological space between the diving surface and the ground surface. It has important function in the formation and change of underground water resource, and has the functions of storing water and transmitting surface water seepage. The aeration zone is an important barrier against groundwater contamination, but there are also a number of potential sources of contamination, including mainly: firstly, surface sewage seeps and pollutes underground water through an aeration zone, which is a very common phenomenon in cities, industrial and mining areas and farmland irrigation areas with large amount of sewage discharge; secondly, the polluted soil body with air inclusion is polluted by the groundwater caused by the atmospheric precipitation or infiltration of irrigation water, the pollution of the soil body with air inclusion can be caused due to the spraying and removing of pesticides and fertilizers in farmlands, the irrigation of sewage, the falling of polluted dust in the atmosphere and the like, and the polluted substances in the polluted soil body enter the water under the action of later-stage infiltration so as to pollute the groundwater; pollutants in the garbage disposal site, the waste tailings and the slag stacking site are carried by rainfall and other water flows and pollute the underground water through the aeration zone. However, with the implementation of the pressure recovery project and the development of the groundwater recharge project, the groundwater level continuously rises, pollutants in the aeration zone become one of important pollution sources of the groundwater, and the influence of the groundwater level rise on the aeration zone pollution sources through high-degree reduction simulation is particularly important.
The reasons for underground water quality change in the process of artificial back-up are manifold: different recharging water sources carry different solutes; the water-bearing stratum mineral and the injected water or the original groundwater generate water-rock interaction; the recharge water interacts with potential contaminants. In the super-mining areas similar to the North China plain, the shallow region is in a dry state for a long time due to continuous super-mining, and once the underground water level of the underground water recharging project is stopped falling and raised, sudden changes of the shallow underground water flow field, the chemical field and the storage capacity are caused; because the air-entrapping zone of the backfill region and the potential pollution sources in the corresponding drying layer are diverse, the migration characteristics of the pollution sources in the air-entrapping zone are different in different regions, and the risk level of the groundwater environment is not clear in the process of backfill infiltration and water level rising. Therefore, the underground water recharging simulation experiment platform based on the aeration zone-underground water pollution correlation simulation experiment platform is established, the underground water recharging process is highly reduced and simulated, real-time monitoring is carried out, various key parameters are obtained, and technical support is provided for the actual underground water recharging project.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a groundwater recharge simulation experiment platform based on aeration zone-groundwater pollution correlation simulation experiment platform to solve the problem that groundwater recharge analogue means's simulation experiment fidelity is low.
The utility model discloses a ground experiment platform includes dynamic water level analogue means, package gas zone analogue means, rainfall irrigation analogue means and groundwater anaplerosis analogue means.
The main body of the dynamic water level simulation device is a box-type shell with a rectangular cross section, the box-type shell is formed by processing organic glass, and the periphery of the box-type shell is reinforced and supported by a stainless steel bracket; two parallel porous permeable plates are arranged in the box-type shell, the two porous permeable plates are respectively close to and parallel to one wall plate of the box-type shell, and the distance between the porous permeable plates and the close wall plate is 80-120 mm; the plate surface of the porous permeable plate is densely provided with water passing holes with the aperture of 1-3 mm; the lower edge of the porous permeable plate is in sealing contact with the bottom plate of the box-type shell, the upper edge of the porous permeable plate is flush with the upper opening of the box-type shell, and the other two edges of the porous permeable plate are perpendicular to and in sealing contact with the two parallel wall plates of the box-type shell; the porous permeable plate and the parallel and close wall plate form a groundwater free diving surface, the free water surface can better simulate the groundwater head pressure difference, and the independent water dune formed by the water injection hole is avoided.
The upper part of the free diving surface is sealed by an organic glass plate, an air inlet hole and an air outlet hole are formed in the glass plate, and the diameters of the air inlet hole and the air outlet hole are 8-12 mm; the air inlet hole is connected with an air inlet pipe with the outer diameter equal to the diameter of the air inlet pipe, the air inlet pipe extends into the bottom of the box-type shell, and a hole with the diameter of 1-2 mm is formed in the pipe wall of the part, inserted into the box-type shell, of the air inlet pipe; the air inlet pipe is externally connected with a nitrogen storage device, and the exhaust holes discharge redundant gas. The air inlet hole is continuously filled with nitrogen, so that the influence of air on the underground water Eh is avoided.
A plurality of water inlets are arranged on a wall plate of the box-type shell parallel to the porous permeable plate, and a plurality of water outlets are arranged on the other side wall plate parallel to the wall plate; the water inlet and the water outlet are uniformly distributed in three layers, the aperture is 10-30 mm, the distance between the upper part and the lower part and the distance between the left part and the right part are 200-300 mm, the water inlet is connected with the water tank, a height adjustable device is arranged below the water tank, so that the free diving surface can be adjusted, and the water inlet and the water outlet are provided with a flowmeter and a valve; according to the water inlet and outlet holes corresponding to the water level switches, the design that a plurality of water inlet and outlet holes and the free water surface in the box body are uniform can simulate the runoff and drainage of underground water more effectively; meanwhile, the water inlet and the water outlet are mutually adjusted to realize the simulation and regulation of parameters such as the flow, the flow speed and the like of the underground water in the aquifer medium of the hydrogeological unit.
A plurality of sampling ports are uniformly arranged on two side wall plates of the box-type shell vertical to the porous water permeable plate, and the diameter of each sampling port is 10-20 mm; the sampling port is made of a glass tube; an in-situ monitoring instrument or a sealing film is arranged on each sampling port; the sampling port can be used for sampling or connecting an in-situ monitoring instrument; the sealing mode of the sampling port is that sealing adhesive films are pasted on two sides, quartz sand and purified water are filled in holes, and air is isolated, so that the inside of the simulation device is kept undisturbed.
Filling a water-bearing stratum medium for simulating a hydrogeological unit in the box-type shell, covering a clay layer on the top of the water-bearing stratum, simulating a water-bearing stratum top plate and playing a role in isolating air; the thickness of the clay layer is 80-120 mm.
The aeration zone simulation device comprises an organic glass column and a medium filled in the organic glass column; the organic glass column is inserted into the clay layer and is vertical to the top surface of the box-type shell; the organic glass column is connected with the main body bracket by using the stainless steel bracket, the organic glass column does not contain a clay layer, and the bottom of the organic glass column is contacted with a water-bearing layer medium; filling media simulating a gas-coated lithologic structure are filled in the organic glass column, sampling ports are uniformly distributed on the organic glass column body, the specification of the sampling ports is the same as that of the sampling ports arranged on the box-type shell, and the sampling ports can be used for arranging sampling and in-situ monitoring equipment; the diameter of each organic glass column is 280-320 mm;
a plurality of organic glass tubes are arranged in the box-type shell and parallel to the organic glass columns; the pipe diameter of the organic glass pipe is 50-80 mm, and a hole with the diameter of 1-3 mm is formed in the pipe wall; the organic glass pipe is used for simulating a monitoring well, clay layer sections above the monitoring well are free of water seepage holes, the upper end of the organic glass pipe is sealed, an air inlet hole and an air outlet hole are formed, and the lower end of the organic glass pipe is connected with the bottom of the box-type shell; the air inlet is connected with an air inlet pipe, a hole with the diameter of 1-2 mm is formed in the pipe wall of the air inlet pipe, which is positioned in the organic glass pipe, and the air inlet pipe extends into the bottom of the box-type shell; the air inlet pipe is externally connected with a nitrogen storage device; the nitrogen gas helps to maintain the redox environment of the simulation device.
When filling media simulating the gas-coated lithologic structure are filled in the organic glass column, various pollution sources can be placed at different depths, and related in-situ monitoring probes are embedded simultaneously, wherein the monitoring probes are one or more of a water quality monitoring probe, a water level monitoring probe, a pH monitoring probe, an oxidation-reduction potential monitoring probe, a conductivity monitoring probe, a temperature monitoring probe and a dissolved oxygen monitoring probe.
The rainfall irrigation simulation device comprises a water tank, a water pipeline, a flowmeter, a valve and a shower head. By adjusting and controlling the property of the water source in the water tank, the influence of different external water sources such as simulated acid rain, polluted irrigation and the like with different pH values and various ion contents on the aeration zone and the migration and conversion of the pollution source in the aeration zone can be realized.
The recharging simulation device comprises a water tank, a height-adjustable device, a valve, a flowmeter, a well-filling recharging simulation device or a river-channel infiltration recharging simulation device.
The well filling type recharging simulation device comprises a glass well which is vertically buried in the dynamic water level simulation device and is sealed at the top end, the diameter of the glass well is 80-120 mm, the glass well directly penetrates into the bottom of the dynamic water level simulation device, and a hole with the diameter of 1-3 mm is formed in the wall of the well where the glass well is inserted into the dynamic water level simulation device; and a stainless steel net is wound on the periphery of the glass well, so that a water-bearing layer medium is prevented from entering the well pipe.
The river course infiltrates formula benefit analogue means again and includes the cube glass cover at perpendicular to dynamic water level analogue means top, does not contain the clay layer in the glass cover, and glass cover bottom direct contact aquifer medium top, and glass cover bottom sets up the infiltration hole of diameter 1 ~ 3mm, glass cover height is 100 ~ 200 mm.
The top of the glass well or the glass cover is provided with water injection holes, and the water injection holes penetrate into the water injection pipe; the water injection pipe of the glass well extends to the bottom of the dynamic water level simulation device, and the water injection pipe of the glass cover extends to the upper part of the aquifer medium; the water injection pipe is connected with the water tank and is provided with a valve and a flowmeter.
The recharging water source in the recharging simulation device can select various water sources (regenerated water, rain flood and external water sources), a flowmeter and a valve are arranged when the recharging water source is discharged from a main pipeline, the water supply amount is controlled, and the recharging water source is injected into a simulated seepage well or a simulated river channel; closely monitoring the flow field evolution of a recharge water source after water injection, particularly the water level amplitude of a water dune fluctuation zone and the influence on aeration; along with the rising of the whole water level, the height of a water tank of an underground water source needs to be adjusted to prevent recharging; monitoring the water quality evolution of underground water along with the rising of the water level, wherein the water quality evolution is mainly influenced by the action of a replenishing water source, underground raw water and a water-bearing stratum medium; monitoring the relationship between the evolution of the whole flow field and the migration and transformation of the pollutants in the recharging process, calculating the relationship between the recharging rate and the amplitude of the water level, and avoiding the pollution of the pollutants in the aeration zone to the underground water; a series of key parameters can be obtained on the whole, and the deterioration of the groundwater quality is effectively avoided.
The utility model discloses technical scheme's excellent effect as follows:
1) the utility model forms a complete three-dimensional pollution simulation device with vertical infiltration of the aeration zone and horizontal migration of the aquifer by adding various pollution sources on the aeration zone simulation device, three-dimensionally monitoring the migration and transformation of the pollution sources in the aeration zone and the migration and transformation after entering the aquifer; different pollution sources are added into the simulated aeration zone infiltration device in the pollution correlation simulation device to simulate the evolution of the flow field of the underground water in the recharging process, and various influence factors of potential polluted underground water quality in the groundwater recharging process are simulated in the pollution correlation simulation device to obtain various key parameters
2) The utility model discloses constitute a perfect three-dimensional hydrogeological unit model of aeration zone aquifer, can simulate under groundwater anaplerosis condition, anaplerosis water source and groundwater combined action are to the influence of aeration zone pollution sources, the migration transformation process of simulation pollutant from vertical to the horizontal direction, and the collection of relevant environmental parameter, can observe the migration process of pollutant in aeration zone soil and aquifer clearly, be convenient for go deep into the solute migration and the migration transformation law of analysis pollutant in aeration zone soil and aquifer.
3) The utility model discloses changed original physical simulation device's constitution, structure and theory of operation, realized the organic combination of aeration zone, saturated area, aquifer, resupply process water dune, can satisfy aeration zone soil unsaturated seepage flow simulation, have multidimensional flow simulation, three-dimensional monitoring ability moreover, highly restore the migration transformation way that pollutant migration to groundwater and further diffusion in the aeration zone.
4) The utility model has simple structure, accurate measurement data and wide application; the migration and transformation path of the pollutants in the aeration zone-aquifer under different pollutants, different rainfall conditions and different groundwater flow field conditions can be simulated; the utility model effectively avoids air entering the inside of the simulator, and highly restores the environmental characteristics of aquifer of aeration zone; the utility model discloses can simulate the vertical migration of pollutant in the aeration zone, at the diffusion migration in water level fluctuation area, at the horizontal migration simulation of aquifer.
Drawings
FIG. 1: the utility model relates to a formula groundwater is mended again simulation experiment platform and is looked sideways at schematic diagram to well
FIG. 2: the utility model relates to a well formula groundwater recharge simulation experiment platform of irritating overlooks the sketch map
FIG. 3: the utility model relates to a river course infiltration type groundwater is mended simulation experiment platform and is looked sideways at schematic diagram
FIG. 4: the utility model relates to a river course infiltration type groundwater is mended again simulation experiment platform and is looked down the sketch map
Description of reference numerals:
1-dynamic water level simulation device, 2-aeration zone simulation device, 3-rainfall irrigation simulation device, 4-porous water permeable plate, 5-organic glass plate, 6-air inlet hole, 7-air outlet hole, 8-air inlet pipe, 9-nitrogen storage device, 10-water tank, 11-height adjustable device, 12-flowmeter, 13-valve, 14-water inlet, 15-water outlet, 16-sampling port, 17-clay layer, 18-organic glass column, 19-organic glass pipe, 20-water pipeline, 21-shower head, 22-well irrigation type recharge simulation device, 23-river channel infiltration type recharge simulation device, 24-glass well, 25-glass cover, 26-water seepage hole, 27-water injection hole
Detailed Description
The present invention will be described in detail and fully with reference to the following description and specific examples, but the present invention is not limited thereto, and the following test methods are conventional in the art unless otherwise specified.
The utility model discloses a groundwater recharge simulation experiment platform includes dynamic water level analogue means 1, package gas zone analogue means 2, rainfall irrigation analogue means 3 and groundwater recharge analogue means.
The main body of the dynamic water level simulation device 1 is a box-type shell with a rectangular cross section, the box-type shell is formed by processing organic glass, and the periphery of the box-type shell is reinforced and supported by a stainless steel bracket; two parallel porous permeable plates 4 are arranged in the box-type shell, the two porous permeable plates 4 are respectively close to and parallel to one wall plate of the box-type shell, and the distance between the porous permeable plates 4 and the close wall plate is 100 mm; the surface of the porous permeable plate 4 is densely provided with water passing holes with the aperture of 2 mm; the lower edge of the porous permeable plate 4 is in sealing contact with the bottom plate of the box-type shell, the upper edge of the porous permeable plate is flush with the upper opening of the box-type shell, and the other two edges of the porous permeable plate 4 are vertical to and in sealing contact with the two parallel wall plates of the box-type shell; the porous permeable plate 4 forms a groundwater free diving surface with the parallel and close wall plate, the free water surface can better simulate the groundwater head pressure difference, and the independent water dune formed by the water injection hole is avoided.
The upper part of the free diving surface is sealed by an organic glass plate 5, an air inlet hole 6 and an air outlet hole 7 are formed in the glass plate, and the diameters of the air inlet hole 6 and the air outlet hole 7 are both 10 mm; the air inlet hole 6 is connected with an air inlet pipe 8 with the outer diameter equal to the diameter of the air inlet pipe 8, the air inlet pipe 8 extends into the bottom of the box-type shell, and a hole with the diameter of 1mm is formed in the pipe wall of the part, inserted into the box-type shell, of the air inlet pipe 8; the air inlet pipe 8 is externally connected with a nitrogen storage device 9, and the exhaust hole 7 exhausts redundant gas. The air inlet 6 injects nitrogen continuously, so as to avoid the influence of air on the underground water Eh.
A plurality of water inlets 14 are arranged on a wall plate of the box-type shell parallel to the porous permeable plate 4, and a plurality of water outlets 15 are arranged on the other wall plate parallel to the wall plate; the water inlet 14 and the water outlet 15 are divided into three layers, namely an upper layer and a lower layer, which are uniformly distributed, the aperture is 20mm, the distance between the upper layer and the lower layer and the distance between the left layer and the right layer are 250mm, the water inlet 14 is connected with the water tank 10, the height-adjustable device 11 is arranged below the water tank 10, so that the free diving surface can be adjusted, and the water inlet 14 and the water outlet 15 are both provided with a flowmeter 12 and a; according to the water inlet and outlet holes corresponding to the water level switches, the design that a plurality of water inlet and outlet holes and the free water surface in the box body are uniform can simulate the runoff and drainage of underground water more effectively; meanwhile, the water inlet 14 and the water outlet 15 are mutually adjusted to realize the simulation and regulation of parameters such as the flow, the flow speed and the like of the underground water in the aquifer medium of the hydrogeological unit.
A plurality of sampling ports 16 made of organic glass tubes 19 are uniformly arranged on two side wall plates of the box-type shell vertical to the porous water permeable plate 4, and the diameter of each organic glass tube 19 is 10 mm; an in-situ monitoring instrument or a sealing film is arranged on each sampling port 16; the sampling port 16 can be used for sampling or connecting an in-situ monitoring instrument; the sealing mode of the sampling port 16 is that sealing adhesive films are pasted on two sides, quartz sand and purified water are filled in the sampling port, air is isolated, and therefore the inside of the simulation device is kept free from interference.
Filling a water-bearing stratum medium for simulating hydrogeological units in the box-type shell, covering a clay layer 17 on the top of the water-bearing stratum, simulating a water-bearing stratum top plate and playing a role in isolating air; the thickness of the clay layer 17 is 100 mm.
The aeration zone simulation device 2 comprises an organic glass column 18 and a medium filled in the organic glass column; the organic glass column 18 is inserted into the clay layer 17 and is vertical to the top surface of the box-type shell; the organic glass column 18 is connected with the main body bracket by using a stainless steel bracket, the organic glass column 18 does not contain a clay layer 17, and the bottom of the organic glass column 18 is contacted with a water-bearing stratum medium; filling media simulating a gas-coated band lithologic structure are filled in the organic glass column 18, sampling ports are uniformly distributed on the column body of the organic glass column 18, the specification of the sampling ports is the same as that of the sampling ports arranged on the box-type shell, and the sampling ports can be used for sampling and arranging in-situ monitoring equipment; the diameters of the organic glass columns 18 are all 300 mm;
a plurality of organic glass tubes 19 are arranged in the box-type shell and parallel to the organic glass columns 18; the diameter of the organic glass tube 19 is 70mm, and a hole with the diameter of 2mm is arranged on the tube wall; the organic glass tube 19 is used for simulating a monitoring well, 17 sections of clay layers above the monitoring well are free of water seepage holes 26, the upper end of the organic glass tube is sealed, an air inlet hole 6 and an air outlet hole 7 are arranged, and the lower end of the organic glass tube is connected with the bottom of the box-type shell; the air inlet hole 6 is connected with an air inlet pipe 8, a hole with the diameter of 1mm is formed in the pipe wall of the air inlet pipe 8 positioned in the organic glass pipe 19, and the air inlet pipe 8 extends into the bottom of the box-type shell; the air inlet pipe 8 is externally connected with a nitrogen storage device 9; the nitrogen gas helps to maintain the redox environment of the simulation device.
When the organic glass column 18 is filled with a filling medium for simulating a gas-coated lithologic structure, various pollution sources can be placed at different depths, and related in-situ monitoring probes are embedded simultaneously, wherein the monitoring probes are one or more of a water quality monitoring probe, a water level monitoring probe, a pH monitoring probe, an oxidation-reduction potential monitoring probe, a conductivity monitoring probe, a temperature monitoring probe and a dissolved oxygen monitoring probe.
The rainfall irrigation simulation device 3 comprises a water tank 10, a water pipeline 20, a flowmeter 12, a valve 13 and a shower head 21. By regulating and controlling the water source property in the water tank 10, the influence of different external water sources such as simulated acid rain, pollution irrigation and the like with different pH values and various ion contents on the aeration zone and the migration and conversion of the pollution source in the aeration zone can be realized.
The recharging simulation device comprises a water tank 10, a height-adjustable device 11, a valve 13, a flowmeter 12, a well-filling recharging simulation device 22 or a river-channel infiltration recharging simulation device 23.
The well-filling type recharging simulation device 22 comprises a glass well 24 which is vertically embedded in the dynamic water level simulation device 1 and is sealed at the top end, the diameter of the glass well 24 is 100mm, the glass well directly penetrates into the bottom of the dynamic water level simulation device 1, and a hole with the diameter of 2mm is formed in the wall of a well of the part, inserted into the dynamic water level simulation device 1, of the glass well 24; the periphery of the glass well 24 is wound with a stainless steel net to prevent aquifer media from entering the well pipe.
River course infiltration formula is mended analogue means 23 again includes the cube glass cover 25 at 1 top of perpendicular to dynamic water level analogue means, does not contain clay layer 17 in the glass cover 25, and glass cover 25 bottom direct contact aquifer medium top, and glass cover 25 bottom sets up diameter 2 mm's infiltration hole 26, glass cover 25 height is 150 mm.
The top of the glass well 24 or the glass cover 25 is provided with a water injection hole 27, and the water injection hole 27 extends into a water injection pipe; the water injection pipe of the glass well 24 extends to the bottom of the dynamic water level simulator 1, and the water injection pipe of the glass cover 25 extends to the upper part of the aquifer medium; the water injection pipe is connected to a water tank 10 and is provided with a valve 13 and a flow meter 12.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. An underground water recharging simulation experiment platform is characterized by comprising a dynamic water level simulation device, an aeration zone simulation device, a rainfall irrigation simulation device and an underground water recharging simulation device;
the main body of the dynamic water level simulation device is a box-type shell with a rectangular section, two parallel porous permeable plates are arranged inside the box-type shell, the porous permeable plates are respectively close to and parallel to one wall plate of the box-type shell, and the distance between the porous permeable plates and the close wall plate is 80-120 mm; the surface of the porous permeable plate is provided with water passing holes with the aperture of 1-3 mm; the lower edge of the porous permeable plate is in sealing contact with the bottom plate of the box-type shell, the upper edge of the porous permeable plate is flush with the upper opening of the box-type shell, and the other two edges of the porous permeable plate are perpendicular to and in sealing contact with the two parallel wall plates of the box-type shell; a water-bearing stratum medium for simulating a hydrogeological unit is filled in the box-type shell, and a clay layer for simulating a water-bearing stratum top plate is covered at the top of the box-type shell; the thickness of the clay layer is 80-120 mm;
the aeration zone simulation device comprises an organic glass column and a medium filled in the organic glass column; the organic glass column is inserted into the clay layer and is vertical to the top surface of the box-type shell; the organic glass column does not contain a clay layer, and the bottom of the organic glass column is in contact with a water-bearing stratum medium;
the rainfall irrigation simulation device comprises a water tank, a water pipeline, a flowmeter, a valve and a shower head;
the groundwater recharge simulation device comprises a water tank, a height adjustable device, a valve, a flowmeter and a well irrigation recharge simulation device or a river channel infiltration recharge simulation device.
2. The experiment platform as claimed in claim 1, wherein a free diving surface of groundwater is formed between the porous water permeable plate and the parallel and close wall plate, the free diving surface is sealed by a plexiglass plate, and the plexiglass plate is provided with an air inlet and an air outlet; the diameters of the air inlet and the air outlet are both 8-12 mm; the air inlet is connected with an air inlet pipe with the outer diameter equal to the diameter of the air inlet pipe, and the air inlet pipe extends into the bottom of the box-type shell; a hole with the diameter of 1-2 mm is formed in the pipe wall of the part, inserted into the box-type shell, of the air inlet pipe; the air inlet pipe is externally connected with a nitrogen storage device.
3. The experiment platform as claimed in claim 1 or 2, wherein a plurality of water inlets are arranged on a wall plate of the box-type shell parallel to the porous water permeable plate, and a plurality of water outlets are arranged on the other wall plate parallel to the wall plate; the water inlet is connected with the water tank, the height-adjustable device is arranged below the water tank, and the water inlet and the water outlet are both provided with a flowmeter and a valve.
4. The experiment platform as claimed in claim 3, wherein a plurality of sampling ports are uniformly arranged on two wall plates of the box-type shell vertical to the porous water permeable plate, and the diameter of each sampling port is 10-20 mm; a sealing film is arranged on each sampling port, and quartz sand and purified water are filled in the sampling ports.
5. The experimental platform of claim 4, wherein the internal packing medium of the plexiglas column is a packing medium that simulates an aeration zone lithologic structure; sampling ports are uniformly distributed on the organic glass column body; the diameter of the organic glass column is 280-320 mm.
6. The laboratory platform according to claim 5, wherein a plexiglas tube is provided in said box-like housing parallel to the plexiglas column; the pipe diameter of the organic glass pipe is 50-80 mm, and holes with the diameter of 1-3 mm are formed in the pipe wall; the upper end of the organic glass tube is sealed, an air inlet hole and an air outlet hole are arranged, and the lower end of the organic glass tube is connected with the bottom of the box-type shell; the air inlet is connected with an air inlet pipe, a hole with the diameter of 1-2 mm is formed in the pipe wall of the air inlet pipe, which is positioned in the organic glass pipe, and the air inlet pipe extends into the bottom of the box-type shell; the air inlet pipe is externally connected with a nitrogen storage device.
7. The laboratory platform of claim 6, wherein different depths of the packing medium inside said plexiglass column are provided with contamination sources and in-situ probes.
8. The experiment platform as claimed in claim 7, wherein the well-filling type recharging simulation device comprises a glass well which is vertically embedded in the dynamic water level simulation device and is sealed at the top end, the diameter of the glass well is 80-120 mm, the glass well directly penetrates into the bottom of the dynamic water level simulation device, and a hole with the diameter of 1-3 mm is arranged on a well wall of a part, inserted into the dynamic water level simulation device, of the glass well.
9. The experimental platform of claim 8, wherein said channel infiltration type anaplerosis simulation device comprises a cubic glass cover perpendicular to the top of the dynamic water level simulation device; the glass cover does not contain a clay layer, and the bottom of the glass cover is directly contacted with the upper part of the aquifer medium; the bottom of the glass cover is provided with a water seepage hole with the diameter of 1-3 mm; the height of the glass cover is 100-200 mm.
10. The experiment platform as claimed in claim 9, wherein the top of the glass well or the glass cover is provided with a water injection hole, and the water injection hole penetrates into the water injection pipe; the water injection pipe of the glass well extends into the bottom of the dynamic water level simulation device; the water injection pipe of the glass cover extends to the upper part of the aquifer medium; the water injection pipe is connected with the water tank and is provided with a valve and a flowmeter.
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| CN201920437791.2U CN209894806U (en) | 2019-04-02 | 2019-04-02 | Groundwater recharge simulation experiment platform |
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| CN201920437791.2U CN209894806U (en) | 2019-04-02 | 2019-04-02 | Groundwater recharge simulation experiment platform |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111289419A (en) * | 2020-03-24 | 2020-06-16 | 中南大学 | Measuring device for engineering barrier membrane effect in heavy metal pollution site |
| CN111665180A (en) * | 2020-06-03 | 2020-09-15 | 中国地质大学（武汉） | Experimental system and method for slowly leaching aquifer rock samples of bedrock in multiple batches |
-
2019
- 2019-04-02 CN CN201920437791.2U patent/CN209894806U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111289419A (en) * | 2020-03-24 | 2020-06-16 | 中南大学 | Measuring device for engineering barrier membrane effect in heavy metal pollution site |
| CN111665180A (en) * | 2020-06-03 | 2020-09-15 | 中国地质大学（武汉） | Experimental system and method for slowly leaching aquifer rock samples of bedrock in multiple batches |
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