CN113281235B - Underground water artificial recharge seepage simulation monitoring system and method - Google Patents
Underground water artificial recharge seepage simulation monitoring system and method Download PDFInfo
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 36
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- 238000000034 method Methods 0.000 title claims abstract description 27
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 82
- 238000005070 sampling Methods 0.000 claims abstract description 42
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 41
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- 239000003673 groundwater Substances 0.000 claims abstract description 29
- 239000011148 porous material Substances 0.000 claims abstract description 12
- 230000008569 process Effects 0.000 claims abstract description 12
- 230000035699 permeability Effects 0.000 claims abstract description 10
- 244000005700 microbiome Species 0.000 claims abstract description 8
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- 230000001502 supplementing effect Effects 0.000 claims description 7
- 239000012528 membrane Substances 0.000 claims description 3
- 238000012543 microbiological analysis Methods 0.000 claims description 3
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- 230000033116 oxidation-reduction process Effects 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 4
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Abstract
The invention provides a system and a method for simulating and monitoring groundwater artificial recharge seepage, and relates to the technical field of experimental analysis instruments. The groundwater artificial recharge seepage simulation monitoring system comprises a water inlet tank, a first nitrogen bag, an anaerobic seepage column, a second nitrogen bag, a sampling probe, a sampler, a pressure sensor, a pressure data acquisition unit and a water outlet tank. The invention relates to a simulation monitoring method of groundwater artificial recharge seepage, which is characterized in that the simulation monitoring system of groundwater artificial recharge seepage is applied to simulate artificial recharge seepage in an underground anaerobic environment, the oxidation-reduction sensitive indexes and pore water pressure of aquifers in the groundwater artificial recharge process are monitored, the oxidation-reduction zonation characteristics of the aquifers of all layers are represented, meanwhile, the permeability coefficient of each aquifer is calculated, and the microorganism blocking process on the aquifers of all layers of artificial recharge is analyzed.
Description
Technical Field
The invention relates to the technical field of groundwater environment remediation, in particular to a groundwater artificial recharge seepage simulation monitoring system and a method.
Background
At present, the artificial recharge of underground water is an important way for realizing the recharge of the underground water, the groundwater resources can be increased for the recharge of the underground water, the surface water is regulated and stored, the ground settlement is prevented or controlled, the quality of the underground water is improved, the water temperature is regulated to achieve the aim of underground energy storage, the underground saline water is reformed, and the underground fresh water hydraulic barrier is established to prevent the reverse recharge of seawater or the invasion of the underground saline water and the like. The groundwater artificial recharge simulating device can provide help for scientific research engineers to analyze and research the recharge process mechanism and solve engineering technical problems. The existing underground water artificial recharge simulation device is generally an open system, cannot simulate an underground anaerobic environment, and causes difficulty in researching the microorganism blockage process and the redox zonal coupling characteristics of an artificial recharge aquifer.
Disclosure of Invention
The invention aims to provide a system and a method for simulating and monitoring artificial recharge seepage of underground water, which are used for simulating artificial recharge seepage in an underground anaerobic environment and realizing monitoring and analysis.
In order to achieve the above purpose, the technical solution adopted by the invention is as follows:
an underground water manual recharge seepage simulation monitoring system comprises a water inlet tank, a first nitrogen bag, an anaerobic seepage column, a second nitrogen bag, a sampling probe, a sampler, a pressure sensor, a pressure data acquisition unit and a water outlet tank;
the anaerobic seepage column comprises a top cover, a bottom cover and a column body, wherein the column body is formed by splicing a plurality of sections of sleeves into an integral structure along the vertical direction, the sleeves of adjacent sections are detachably and hermetically connected, the uppermost sleeve is detachably and hermetically connected with the top cover, and the lowermost sleeve is detachably and hermetically connected with the bottom cover;
a plurality of layers of water-containing media are filled in the column body from bottom to top, a first upper water distribution plate is arranged above the water-containing media in the column body, a second upper water distribution plate is arranged between the uppermost sleeve and the top cover, an upper support frame is arranged between the first upper water distribution plate and the second upper water distribution plate, a first lower water distribution plate is arranged below the water-containing media in the column body, a second lower water distribution plate is arranged between the lowermost sleeve and the bottom cover, and a lower support frame is arranged between the first lower water distribution plate and the second lower water distribution plate;
a plurality of sampling holes are formed in one side of the cylindrical side surface of the column body at equal intervals, and a plurality of pressure measuring holes are formed in the other side of the cylindrical side surface of the column body at equal intervals;
the sampling probes with the same number as the sampling holes are arranged in the column body at equal intervals, the sampling probes are positioned in the water-containing medium, the sampling probes are connected with the sampler through sampling pipelines, and the sampling pipelines pass through the sampling holes;
the pressure measuring hole is connected with a pressure sensor, and the pressure sensor is connected with a pressure data acquisition unit through a signal cable;
the water inlet tank sets up to the closed box, the water inlet tank is connected with the moisturizing pipeline, be provided with first valve on the moisturizing pipeline, the top cap of anaerobism seepage flow post is connected through water inlet pipe in the bottom of water inlet tank, the bottom of anaerobism seepage flow post is through outlet pipe way connection outlet tank, first nitrogen air pocket is connected through first gas supply line in the top of water inlet tank, the top cap of anaerobism seepage flow post is connected with exhaust pipe, be provided with the second valve on the exhaust pipe way, the top cap of anaerobism seepage flow post is through second gas supply line connection second nitrogen air pocket.
Preferably, the sleeves of adjacent sections are detachably connected in a sealing manner through flanges, the uppermost sleeve is detachably connected with the top cover in a sealing manner through a flange, and the lowermost sleeve is detachably connected with the bottom cover in a sealing manner through a flange.
Preferably, the wall surface of the inner wall of the cylinder is provided with a rough surface.
Preferably, a first flow valve is arranged on the water inlet pipeline, and a second flow valve is arranged on the water outlet pipeline.
Preferably, a plurality of water permeable holes are formed in the first upper water distribution plate, the second upper water distribution plate, the first lower water distribution plate and the second lower water distribution plate.
Preferably, the bottom cover is a funnel, and the water outlet pipeline is connected with the bottom position of the funnel.
Preferably, the sampling probe is provided with a hydrophilic microporous filter membrane.
Preferably, one end of the sampling pipeline is connected with the sampling probe, and the other end of the sampling pipeline is connected with the sampler through the quick connector.
Preferably, the pressure data acquisition unit comprises a pressure data acquisition unit and a computer, the pressure sensors are connected with the pressure data acquisition unit through signal cables, and the pressure data acquisition unit is connected with the computer through the signal cables.
An underground water artificial recharge seepage simulation monitoring method, which applies the underground water artificial recharge seepage simulation monitoring system;
the method comprises the following steps:
step one, detaching a top cover of the anaerobic seepage column from a column body, sequentially filling multiple layers of water-containing media into the column body in a layered manner, tamping, and hermetically connecting a sleeve at the uppermost part of the column body with the top cover;
step two, opening a second valve on the exhaust pipeline, filling anaerobic distilled water into the anaerobic seepage column through the water outlet pipeline, evacuating air in the anaerobic seepage column through the exhaust pipeline and closing the second valve, filling anaerobic distilled water into the water inlet tank and the water inlet pipeline through the water supplementing pipeline and closing the first valve;
step three, opening a first flow valve on the water inlet pipeline, opening a second flow valve on the water outlet pipeline, adjusting the first flow valve and the second flow valve to a set flow value, enabling anaerobic distilled water in the water inlet tank to flow into an anaerobic seepage column through the water inlet pipeline and continuously flow into the water outlet tank through the water outlet pipeline, filling nitrogen into the water inlet tank by a first nitrogen bag to compensate atmospheric pressure and enable the water inlet tank to keep an anaerobic environment, and filling nitrogen into the anaerobic seepage column by a second nitrogen bag to compensate atmospheric pressure and enable the anaerobic seepage column to keep an anaerobic environment;
collecting a pore water sample by a sampler regularly, determining the redox sensitive index of the water sample, and representing the redox zonation characteristics of each layer of aqueous medium;
acquiring pore water pressure data in real time through a pressure data acquisition unit, and calculating the permeability coefficient of each layer of water-containing medium;
and step five, after a set time, disassembling the anaerobic seepage column, sealing joints at two ends of the anaerobic seepage column, continuously filling nitrogen into the anaerobic seepage column by using a second nitrogen bag, transferring the anaerobic seepage column to an anaerobic workstation under the protection of the nitrogen, collecting microbial samples on each layer of water-containing medium, performing microbiological analysis, and analyzing the microbial blockage process on each layer of water-containing medium by manually recharging according to the permeability coefficient of each layer of water-containing medium.
The beneficial technical effects of the invention are as follows:
the invention relates to a simulation monitoring method of groundwater artificial recharge seepage, which is characterized in that the simulation monitoring system of groundwater artificial recharge seepage is applied to simulate artificial recharge seepage in an underground anaerobic environment, the oxidation-reduction sensitive indexes and pore water pressure of aquifers in the groundwater artificial recharge process are monitored, the oxidation-reduction zonation characteristics of the aquifers of all layers are represented, meanwhile, the permeability coefficient of each aquifer is calculated, and the microorganism blocking process on the aquifers of all layers of artificial recharge is analyzed.
Drawings
FIG. 1 is a schematic structural diagram of an underground water artificial recharge seepage simulation monitoring system according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an anaerobic seepage column in the groundwater artificial recharge seepage simulation monitoring system according to the embodiment of the invention;
FIG. 3 is a schematic structural diagram of components such as a sampler in the groundwater recharge/seepage simulation monitoring system according to the embodiment of the invention;
FIG. 4 is a schematic structural diagram of components such as a pressure data acquisition unit in the groundwater artificial recharge seepage simulation monitoring system according to the embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings in combination with the specific embodiments. Certain embodiments of the invention now will be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. Indeed, various embodiments of the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will satisfy applicable legal requirements.
In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "front", "rear", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Fig. 1 to 4 show a simulation monitoring system for artificial recharge seepage of underground water according to the present embodiment.
The utility model provides an underground water manual recharge seepage flow simulation monitoring system, includes into water tank 1, first nitrogen bag 21, second nitrogen bag 22, anaerobism seepage flow post 3, sampling probe 41, sampler 42, pressure sensor 51, pressure data acquisition unit and play water tank 6 etc..
The anaerobic seepage column 3 comprises a top cover 31, a bottom cover 32 and a column body, wherein the column body is spliced into an integral structure by three sections of sleeves 33 along the vertical direction, the sleeves 33 of adjacent sections are detachably connected in a sealing manner, the uppermost sleeve 33 is detachably connected with the top cover 31 in a sealing manner, and the lowermost sleeve 33 is detachably connected with the bottom cover 32 in a sealing manner. Specifically, the sleeves 33 of adjacent segments are detachably connected through a flange 34, the uppermost sleeve 33 is detachably connected with the top cover 31 through the flange 34, the lowermost sleeve 33 is detachably connected with the bottom cover 32 through the flange 34, and a leakage-stopping adhesive tape is attached to the flange joint of the flange 34 to realize sealing connection. Therefore, the anaerobic seepage column 3 is convenient to disassemble and assemble.
The sleeve 33 is made of organic glass, and a plurality of layers of water-containing media are filled in the column body layer by layer and tamped, so that a test operator can conveniently perform visual operation through the organic glass. During the test, the anaerobic seepage column 3 was covered with a shade cloth to simulate a dull environment of the formation. The thickness of the sleeve 33 is 10mm, the inner diameter is 150mm, and the heights of the three-section sleeve 33 are 350mm, 400mm and 350mm respectively.
The wall surface of the inner wall of the cylinder (sleeve 33) is provided with a rough surface to avoid wall effect on the wall surface of the inner wall.
A plurality of layers of water-containing media are filled in the column body from bottom to top, the water-containing media are made of similar materials such as sand and the like, a first upper water distribution plate 711 is arranged above the water-containing media in the column body, a second upper water distribution plate 712 is arranged at the joint of a flange 34 between the uppermost sleeve 33 and the top cover 31, an upper support frame 731 is arranged between the first upper water distribution plate 711 and the second upper water distribution plate 712, a first lower water distribution plate 721 is arranged below the water-containing media in the column body, a second lower water distribution plate 722 is arranged at the joint of the flange 34 between the lowermost sleeve and the bottom cover 32, and a lower support frame 732 is arranged between the first lower water distribution plate 721 and the second lower water distribution plate 722. The first upper water distribution plate 711, the second upper water distribution plate 712, the first lower water distribution plate 721 and the second lower water distribution plate 722 are all provided with a plurality of water permeable holes so that water can pass through the holes.
The second upper water distribution plate 712 and the second lower water distribution plate 722 are assembled on the flange 34, so that the second upper water distribution plate 712 and the second lower water distribution plate 722 are assembled firmly, the second upper water distribution plate 712 abuts the first upper water distribution plate 711 on the upper surface of the aqueous medium through the upper support frame 731, and the second lower water distribution plate 722 abuts the second upper water distribution plate 712 on the lower surface of the aqueous medium through the lower support frame 732. Therefore, the first upper water distribution plate 711 and the second upper water distribution plate 712 clamp multiple layers of water-containing media together, so that the multiple layers of water-containing media can keep shapes and are prevented from being dispersed by water flow. The second upper water distribution plate 712 can disperse the water flowing out of the water inlet pipe 82 more uniformly, and the second lower water distribution plate 722 can filter the water flowing out from the multi-layer aqueous medium, so as to prevent the water flowing out from blocking the water outlet pipeline 83 with impurities.
Ten sampling holes 331 are formed in the left side of the cylindrical side surface of the column at equal intervals. Ten sampling probes 41 are arranged in the column body at equal intervals, the sampling probes 41 are positioned in the aqueous medium, the sampling probes 41 are connected with a sampler 42 through a sampling pipeline 43, and the sampling pipeline 43 passes through the sampling hole 331. And (4) collecting water samples of the aqueous media of all layers through a sampling probe 41. Wherein, the sampling probe 41 is provided with a hydrophilic microporous filter membrane, and in the sampling process, water in the aqueous medium can enter the sampler 42 through the sampling probe 41, so that the aqueous medium is prevented from entering, and the collected water sample does not need to be filtered. One end of the sampling pipe 43 is connected to the sampling probe 41, and the other end of the sampling pipe 43 is connected to the sampler 42 via a quick connector. After the sampler 42 is sampling, the sampler 42 is detached from the quick connector, and the sampler 42 is connected to the quick connector after the sample in the sampler 42 is taken out. The sampler 42 of the present embodiment is configured as a syringe, which is low in cost and convenient for the test operation. A blocking member 44 is provided between the plunger stem 421 and the rim 422 of the sampler 42 when the sampler 42 is in the non-collection state to maintain the sampler 42 in the non-collection state.
Ten pressure measuring holes 332 are formed in the right side of the side face of the column at equal intervals, the pressure measuring holes 332 are connected with pressure sensors 51, and the pressure sensors 51 are connected with a pressure data acquisition unit through signal cables 52. The pressure data acquisition unit comprises a pressure data acquisition unit 53 and a computer 54, wherein ten pressure sensors 51 are connected with the pressure data acquisition unit 53 through a signal cable 52, and the pressure data acquisition unit 43 is connected with the computer 54 through the signal cable 52. Pore water pressure data are collected by a pressure sensor 51 and are uploaded to a pressure data collector 53, and then are continuously uploaded to a computer 54 for calculation and analysis.
The water inlet tank 1 is arranged on the support frame 11, the water inlet tank 1 is arranged to be a sealed tank body, the water inlet tank 1 is connected with a water supplementing pipeline 81, a first valve 911 is arranged on the water supplementing pipeline 81, and anaerobic distilled water is filled in the water inlet tank 1 and the water inlet pipeline 82 through the water supplementing pipeline 81. The bottom of the water inlet tank 1 is connected with the top cover 31 of the anaerobic seepage column 3 through a water inlet pipeline 82, and the bottom cover 32 of the anaerobic seepage column 3 is connected with the water outlet tank 6 through a water outlet pipeline 83, so that the anaerobic distilled water in the water inlet tank 1 flows into the anaerobic seepage column 3 and continues to flow to the water outlet tank 6. Wherein, the bottom cover 32 is set as a funnel, and one end of the water outlet pipeline 83 is connected with the bottom position of the funnel. The top of the water inlet tank 1 is connected with the first nitrogen bag 21 through a first gas transmission pipeline 84. When the water in the water inlet tank 1 is gradually discharged, nitrogen is filled into the water inlet tank 1 through the first nitrogen bag 21 to compensate the atmospheric pressure and keep the interior of the water inlet tank 1 in an oxygen-free environment. The top cover 31 of the anaerobic seepage column 3 is connected with an exhaust pipeline 85, and a second valve 912 is arranged on the exhaust pipeline 85. The top cover 31 of the anaerobic seepage column 3 is connected with the second nitrogen bag 22 through the second air transmission pipeline 86, and when the water quantity in the anaerobic seepage column 3 is reduced, the second nitrogen bag 22 fills nitrogen into the anaerobic seepage column 3 to compensate the atmospheric pressure and keep the anaerobic environment in the anaerobic seepage column 3.
The water inlet pipeline 82 is provided with a first flow valve 921, and the water inlet pipeline 82 is adjusted to a set flow value through the first flow valve 921 so as to adjust the water quantity entering the anaerobic seepage column 3 through the water inlet pipeline 82. The outlet pipe 83 is provided with a second flow valve 922, and the set flow value is adjusted by the second flow valve 922 to adjust the water amount discharged from the anaerobic osmotic column 3 through the outlet pipe 83.
The embodiment also provides a simulation monitoring method for groundwater artificial recharge percolation, which applies the simulation monitoring system for groundwater artificial recharge in the embodiment;
the method comprises the following steps:
step one, detaching a top cover 31 of an anaerobic seepage column 3 from a column body, sequentially filling a plurality of layers of water-containing media (used for simulating an actual underground aquifer) into the column body in a layering manner and tamping, wherein the height of the tamped water-containing media is about 1000mm, and hermetically connecting a sleeve 33 at the top of the column body with the top cover 31;
step two, opening a second valve 912 on the exhaust pipeline 85, filling anaerobic distilled water into the anaerobic seepage column 3 through the water outlet pipeline 83, emptying the air in the anaerobic seepage column 3 through the exhaust pipeline 85 and closing the second valve 912, filling anaerobic distilled water into the water inlet tank 1 and the water inlet pipeline 82 through the water replenishing pipeline 81 and closing the first valve 911;
step three, opening a first flow valve 921 on the water inlet pipeline 82, opening a second flow valve 922 on the water outlet pipeline 83, adjusting the first flow valve 921 and the second flow valve 922 to a set flow value, allowing the anaerobic distilled water in the water inlet tank 1 to flow into the anaerobic seepage column 3 through the water inlet pipeline 82 and continuously flow into the water outlet tank 6 through the water outlet pipeline 83, filling nitrogen into the water inlet tank 1 by a first nitrogen bag 21 to compensate atmospheric pressure and keep the interior of the water inlet tank 1 in an anaerobic environment, and filling nitrogen into the anaerobic seepage column 3 by a second nitrogen bag 22 to compensate atmospheric pressure and keep the interior of the anaerobic seepage column 3 in an anaerobic environment;
step four, collecting a pore water sample through a sampler 42 regularly, determining redox sensitive indexes (DO, OPR, NO3-, fe2+, mn2+ and the like) of the water sample, and representing redox zonal characteristics of each layer of aqueous medium;
acquiring pore water pressure data in real time through a pressure data acquisition unit, and calculating the permeability coefficient of each layer of water-containing medium;
and step five, after a set time, disassembling the anaerobic seepage column 3, sealing joints at two ends of the anaerobic seepage column 3, continuously filling nitrogen into the anaerobic seepage column 3 by using a second nitrogen bag 22, transferring the anaerobic seepage column 3 to an anaerobic workstation under the protection of the nitrogen, collecting a microorganism sample on each layer of water-containing medium, performing microbiological analysis, and analyzing the microorganism blockage process on each layer of water-containing medium by manually recharging by combining the permeability coefficient of each layer of water-containing medium.
So far, the present embodiment has been described in detail with reference to the accompanying drawings. Based on the above description, those skilled in the art should clearly understand the system and method for simulating and monitoring artificial recharge seepage of underground water according to the present invention. The invention relates to a simulation monitoring method of groundwater artificial recharge seepage, which is characterized in that the simulation monitoring system of groundwater artificial recharge seepage is applied to simulate artificial recharge seepage in an underground anaerobic environment, the oxidation-reduction sensitive indexes and pore water pressure of aquifers in the groundwater artificial recharge process are monitored, the oxidation-reduction zonation characteristics of the aquifers of all layers are represented, meanwhile, the permeability coefficient of each aquifer is calculated, and the microorganism blocking process on the aquifers of all layers of artificial recharge is analyzed.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides an groundwater artifical recharge seepage flow simulation monitoring system which characterized in that: the device comprises a water inlet tank, a first nitrogen bag, an anaerobic seepage column, a second nitrogen bag, a sampling probe, a sampler, a pressure sensor, a pressure data acquisition unit and a water outlet tank;
the anaerobic seepage column comprises a top cover, a bottom cover and a column body, wherein the column body is formed by splicing a plurality of sections of sleeves into an integral structure along the vertical direction, the sleeves of adjacent sections are detachably and hermetically connected, the uppermost sleeve is detachably and hermetically connected with the top cover, and the lowermost sleeve is detachably and hermetically connected with the bottom cover;
a plurality of layers of water-containing media are filled in the column body from bottom to top, a first upper water distribution plate is arranged above the water-containing media in the column body, a second upper water distribution plate is arranged between the uppermost sleeve and the top cover, an upper support frame is arranged between the first upper water distribution plate and the second upper water distribution plate, a first lower water distribution plate is arranged below the water-containing media in the column body, a second lower water distribution plate is arranged between the lowermost sleeve and the bottom cover, and a lower support frame is arranged between the first lower water distribution plate and the second lower water distribution plate;
a plurality of sampling holes are formed in one side of the cylindrical side surface of the column body at equal intervals, and a plurality of pressure measuring holes are formed in the other side of the cylindrical side surface of the column body at equal intervals;
the sampling probes with the same number as the sampling holes are arranged in the column body at equal intervals, the sampling probes are positioned in the water-containing medium and connected with the sampler through sampling pipelines, and the sampling pipelines penetrate through the sampling holes, wherein the sampler is used for collecting a pore water sample, determining the redox sensitive index of the water sample and representing the redox zonation characteristics of each layer of the water-containing medium;
the pressure measuring hole is connected with a pressure sensor, the pressure sensor is connected with a pressure data acquisition unit through a signal cable, wherein the pressure data acquisition unit is used for acquiring pore water pressure data and calculating the permeability coefficient of each layer of water-containing medium;
the water inlet tank is set as a closed tank body, the water inlet tank is connected with a water supplementing pipeline, a first valve is arranged on the water supplementing pipeline, the bottom of the water inlet tank is connected with a top cover of the anaerobic seepage column through the water inlet pipeline, the bottom cover of the anaerobic seepage column is connected with a water outlet tank through a water outlet pipeline, the top of the water inlet tank is connected with a first nitrogen bag through a first gas pipeline, the top cover of the anaerobic seepage column is connected with a gas exhaust pipeline, a second valve is arranged on the gas exhaust pipeline, and the top cover of the anaerobic seepage column is connected with a second nitrogen bag through a second gas pipeline;
the anaerobic seepage column is detachable, joints at two ends of the anaerobic seepage column are sealed, and the second nitrogen bag continuously fills nitrogen into the anaerobic seepage column.
2. The system for simulating and monitoring the groundwater artificial recharge seepage according to claim 1, wherein: the sealing connection can be dismantled through the flange between the sleeve of adjacent section, and the sealing connection top cap can be dismantled through the flange to the sleeve of top, and the sealing connection bottom can be dismantled through the flange to the sleeve of below.
3. The system for simulating and monitoring the groundwater artificial recharge seepage according to claim 1, wherein: the wall surface of the inner wall of the cylinder body is a rough surface.
4. The system for simulating and monitoring the groundwater artificial recharge seepage according to claim 1, wherein: the water inlet pipeline is provided with a first flow valve, and the water outlet pipeline is provided with a second flow valve.
5. The groundwater artificial recharge seepage simulation monitoring system according to claim 1, wherein: a plurality of water permeable holes are formed in the first upper water distribution plate, the second upper water distribution plate, the first lower water distribution plate and the second lower water distribution plate.
6. The groundwater artificial recharge seepage simulation monitoring system according to claim 1, wherein: the bottom cover is set as a funnel, and the water outlet pipeline is connected with the bottom position of the funnel.
7. The groundwater artificial recharge seepage simulation monitoring system according to claim 1, wherein: the sampling probe is provided with a hydrophilic microporous filter membrane.
8. The groundwater artificial recharge seepage simulation monitoring system according to claim 1, wherein: one end of the sampling pipeline is connected with the sampling probe, and the other end of the sampling pipeline is connected with the sampler through the quick coupling.
9. The system for simulating and monitoring the groundwater artificial recharge seepage according to claim 1, wherein: the pressure data acquisition unit comprises a pressure data acquisition unit and a computer, the pressure data acquisition unit is connected with the pressure data acquisition unit through a signal cable, and the pressure data acquisition unit is connected with the computer through a signal cable.
10. An underground water artificial recharge seepage simulation monitoring method is characterized in that the underground water artificial recharge seepage simulation monitoring system of any one of claims 1 to 9 is applied;
the method comprises the following steps:
step one, detaching a top cover of an anaerobic seepage column from a column body, sequentially filling multiple layers of water-containing media into the column body in a layering manner, tamping, and hermetically connecting a sleeve at the uppermost part of the column body with the top cover;
step two, opening a second valve on the exhaust pipeline, filling anaerobic distilled water into the anaerobic seepage column through the water outlet pipeline, evacuating air in the anaerobic seepage column through the exhaust pipeline and closing the second valve, filling anaerobic distilled water into the water inlet tank and the water inlet pipeline through the water supplementing pipeline and closing the first valve;
step three, opening a first flow valve on a water inlet pipeline, opening a second flow valve on a water outlet pipeline, adjusting the first flow valve and the second flow valve to a set flow value, enabling anaerobic distilled water in a water inlet tank to flow into an anaerobic seepage column through the water inlet pipeline and continuously flow into a water outlet tank through the water outlet pipeline, enabling a first nitrogen bag to fill nitrogen into the water inlet tank to compensate atmospheric pressure and enable the interior of the water inlet tank to keep an anaerobic environment, and enabling a second nitrogen bag to fill nitrogen into the anaerobic seepage column to compensate atmospheric pressure and enable the interior of the anaerobic seepage column to keep the anaerobic environment;
collecting a pore water sample by a sampler regularly, determining the redox sensitive index of the water sample, and representing the redox zonation characteristics of each layer of aqueous medium;
acquiring pore water pressure data in real time through a pressure data acquisition unit, and calculating the permeability coefficient of each layer of water-containing medium;
and fifthly, after a set time, disassembling the anaerobic seepage column, sealing joints at two ends of the anaerobic seepage column, continuously filling nitrogen into the anaerobic seepage column by using a second nitrogen bag, transferring the anaerobic seepage column to an anaerobic workstation under the protection of the nitrogen, collecting microorganism samples on each layer of water-containing medium, performing microbiological analysis, and analyzing the microorganism blocking process on each layer of water-containing medium by combining the permeability coefficient of each layer of water-containing medium.
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