CN112577854A - Experimental device for research pollutant migration rule under river and groundwater interact - Google Patents
Experimental device for research pollutant migration rule under river and groundwater interact Download PDFInfo
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Abstract
The invention discloses an experimental device for researching migration rule of pollutants under interaction of river and underground water, relating to the technical field of research of migration rule of pollutants and comprising the following steps: the simulation water tank is used for simulating and filling the aquifer and the aeration zone; the movable water tank is used for controlling a left water head of the simulation water tank; the fixed water tank is used for controlling a right water head of the simulation water tank; the simulated riverbed is arranged in the groove at the upper part of the simulated water tank. The invention has the advantages that the quartz sand after acid washing and alkali washing with proper particle size is utilized to simulate the aquifer, the water head difference between the fixed water tank and the movable water tank on two sides is adjusted to simulate the precipitation amount through the arrangement of the simulated riverbed to change the flow field of the underground water, and the water level of the simulated water tank is changed through the water pump to change different supply relations between the underground water and the surface water, thereby influencing the flow field of the underground water; the experimental device has the characteristics of reasonable design, simple operation, repeatability and strong operability.
Description
Technical Field
The invention relates to the technical field of pollutant migration rules, in particular to an experimental device for researching the migration rules of pollutants under the interaction of rivers and underground water.
Background
The underground water and the surface water are always inseparable whole, the surface water (such as rivers and the like) enters the underground water through the actions of infiltration, leakage and the like, and the underground water enters the surface water through supplying the rivers in the drought period. Thus, as the season changes, surface water interacts with groundwater and significantly affects groundwater flow fields. The pollutants may enter surface water and pollute the groundwater along with the groundwater flow field, and the pollutants may also directly enter the surface water from the groundwater through the supply of rivers, and the migration of the pollutants is obviously influenced by the interaction between the rivers and the groundwater.
At present, most of research on groundwater flow fields by using column experiments or tank experiments is focused, interaction between groundwater and rivers is not considered in the research on migration of pollutants, and therefore, a laboratory device for researching the migration rule of pollutants in groundwater under interaction between rivers and groundwater is still in a blank stage.
Most of the existing laboratory devices for researching the migration of pollutants in underground water are under the condition of a pure underground water flow field, and Chinese patent (CN103994951B) introduces a simulation device for migration and transformation of environmental pollutants in different aquifers of underground water, which can simulate a confined water aquifer and a diving aquifer in a saturated zone, and can also simulate a capillary water zone and the like in a saturated zone, but only is the research in the underground water flow field, does not relate to the interaction between the underground water and surface water, and even cannot research the migration rule of the pollutants under the condition that the flow field changes; chinese patents (CN104483240A, CN105300843A and the like) only consider the migration of pollutants or nano materials only under the condition of an underground water flow field; chinese patents (for example, CN203148652U) describe a temperature tracing device for river water and groundwater, but only the inside of the riverbed is still water, which cannot simulate rivers well, and there is no precipitation device, so it is difficult to simulate the actual environment of supplying river water to groundwater better, and it does not relate to the research on the migration of pollutants.
Therefore, there is an urgent need to develop a laboratory device for studying the migration rule of pollutants under the interaction of rivers and underground water.
Disclosure of Invention
The invention discloses an experimental device for researching the migration rule of pollutants under the interaction between a river and underground water, aiming at solving the technical problem of lacking of researching the migration rule of the pollutants in the underground water under the interaction between the river and the underground water.
In order to achieve the purpose, the invention adopts the following technical scheme:
an experimental device for researching migration rule of pollutants under interaction of rivers and underground water comprises:
the simulation water tank is used for simulating and filling the aquifer and the aeration zone;
the movable water tank is used for controlling a left water head of the simulation water tank;
the fixed water tank is used for controlling a right water head of the simulation water tank;
the simulated riverbed is arranged in the groove at the upper part of the simulated water tank.
As a further preferable aspect of the present invention, the simulated water tank has a stepped structure, and the left side and the right side of the bottom of the simulated water tank are respectively provided with a water outlet switch.
As a further preferable mode of the present invention, the simulated water tank is provided with a groove at the top thereof for mounting the simulated riverbed, and the groove is uniformly provided with a plurality of riverbed drainage holes.
In a further preferred embodiment of the present invention, a contaminant injection hole is opened in a side wall of the simulated water tank.
As a further preferable aspect of the present invention, a shower is further installed above the simulated water tank, and the shower is connected to an external water pipe.
As a further preferred aspect of the present invention, the water shower is uniformly provided with a plurality of shower holes.
In a further preferred embodiment of the present invention, the movable water tank is installed on the left side of the simulated water tank, and the height of the movable water tank is adjustable.
As a further optimization of the invention, a porous plate or a turbulator is arranged at the position where the movable water tank, the fixed water tank and the simulation water tank are communicated.
As a further preferable mode of the present invention, the simulated riverbed is made of organic glass and has a three-piece isosceles trapezoid structure.
Preferably, a plurality of riverbed water-permeable holes are uniformly distributed on the simulated riverbed, and the pore diameter of each riverbed water-permeable hole is smaller than the particle diameter of the quartz sand of the aquifer.
In a further preferred embodiment of the present invention, a peristaltic pump for pumping water is further provided outside each of the movable water tank and the fixed water tank, and a water pump for pumping water is provided outside the simulated riverbed.
The beneficial effect of the invention is that,
1. a simulated riverbed is arranged in the simulated water tank, the depth of the water level in the simulated riverbed is changed by adjusting the water injection speed of a water pump, and the interaction relation between surface water and underground water is changed according to the water head difference and the precipitation strength at two sides, so that the flow field of the underground water is changed;
2. the influence of polluted rivers on underground water can be simulated by directly injecting pollutants from the simulated riverbed, and the migration rule of the pollutants under various interaction conditions of the rivers and the underground water can be simulated by injecting the pollutants from the pollutant injection holes on the side wall of the simulated water tank;
3. the method comprises the steps of simulating an aquifer by using acid-washed and alkali-washed quartz sand with proper particle size, regulating the water head difference between a fixed water tank and a movable water tank on two sides to simulate precipitation by arranging a simulated riverbed to change an underground water flow field, and changing different replenishment relations between underground water and surface water by changing the water level of the simulated water tank through a water pump so as to influence the underground water flow field;
4. the experimental device has the characteristics of reasonable design, simplicity in operation, repeatability and strong operability, can effectively research the migration rule of pollutants in underground water under the interaction of rivers and the underground water, and has wide application prospect.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of a simulated riverbed structure according to the present invention;
FIG. 3 is a top view of a simulated sink of the present invention
Wherein, 1, a movable water tank; 2. a perforated plate; 3. simulating a water tank; 4. a contaminant injection hole; 5. fixing a water tank; 6. a water outlet switch; 7. a peristaltic pump; 8. simulating a riverbed; 9. a water shower; 10. drainage holes of the riverbed; 11. and (4) water permeating holes of a riverbed.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 and 2, an experimental device for researching the migration rule of pollutants under the interaction of rivers and underground water comprises:
a simulation water tank 3 for simulating filling of an aquifer and an aeration zone;
the movable water tank 1 is used for controlling a left water head of the simulation water tank 3;
a fixed water tank 5 for controlling the right side water head of the analog water tank 3;
and the simulated riverbed 8 is arranged in the groove at the upper part of the simulated water tank 3.
In particular, the simulated water tank 3 has a stepped structure, and as shown in fig. 3, the left side and the right side of the bottom of the simulated water tank 3 are respectively provided with a water outlet switch 6, so that water discharged from the simulated water tank 3 can be collected and recycled.
Particularly, a groove for installing a simulated riverbed 8 is formed in the top of the simulated water tank 3, a plurality of riverbed drain holes 10 are uniformly formed in the groove, and the riverbed drain holes 10 are used for draining redundant water in the simulated water tank 3.
In particular, a pollutant injection hole 4 is formed on a side wall of the simulated water tank 3, and can be used for injecting pollutants into the simulated water tank 3.
Particularly, a water sprayer 9 is further installed above the simulation water tank 3, and the water sprayer 9 is connected with an external water pipe and used for increasing precipitation conditions and changing precipitation intensity.
Particularly, the water sprayer 9 is uniformly provided with a plurality of spray holes which are used for uniformly spraying water to the simulation water tank 3.
In particular, the movable water tank 1 is installed at the left side of the simulated water tank 3, the height of the movable water tank 1 can be adjusted, and the height of the movable water tank can be changed upwards as a whole.
Particularly, a perforated plate or a turbulator is arranged at the communication part of the movable water tank 1 and the fixed water tank 5 and the simulation water tank 3 to ensure that the impact of the water flow on the aquifer is small.
In particular, the simulated riverbed 8 is made of organic glass and has a three-piece isosceles trapezoid structure, as shown in fig. 2.
Particularly, a plurality of riverbed permeable holes 11 are uniformly distributed on the simulated riverbed 8, and the aperture of each riverbed permeable hole 11 is smaller than the particle size of the quartz sand of the aquifer.
In particular, a peristaltic pump 7 for pumping water is respectively arranged outside the movable water tank 1 and the fixed water tank 5, and a water pump for pumping water is arranged outside the simulated riverbed 8.
The experimental process of the experimental device is as follows:
filling the quartz sand subjected to acid washing and alkali washing in a simulated water tank 3, uniformly paving the quartz sand on the bottom layer of the simulated water tank 3 to be used as a water-bearing layer with good porosity, filling sandy soil with a certain thickness above the quartz sand after filling the quartz sand with a certain thickness to finish the simulated water-bearing layer and the aeration zone, and properly shaking the quartz sand during filling to ensure uniform filling; in the sand filling process, a simulated riverbed 8 made of organic glass is placed in a groove at the top of the simulated water tank 3, and the periphery of the simulated riverbed can be wrapped and fixed by fillers such as quartz sand and the like; the peristaltic pump 7 for pumping water in the left movable water tank 1 and the peristaltic pump 7 for pumping water in the right fixed water tank 5 are started, water exceeding the interface of the water tanks can directly overflow and be discharged, the water outlet switch 6 can also be opened, the discharged water is collected and recycled, the height difference between the left movable water tank 1 and the right fixed water tank 5 can be adjusted, the water head difference reaches a certain numerical value, and after the water is continuously stabilized for 3 hours, a stable flow field is formed in the system.
If the simulation under the precipitation condition needs to be increased, the spraying amount of the water sprayer 9 can be adjusted according to the required precipitation intensity, and precipitation with certain intensity is simulated; after keeping the speed for 3 hours, the water flow field is basically stable, a water pump injected into the simulated riverbed 8 is turned on, water is injected at a certain flow rate, the flow of the simulated river is simulated, redundant water can be directly discharged from a riverbed water drainage hole 10, after 30min of stabilization, the dyed pollutant solution is directly injected into the simulated water tank 3 from the pollutant injection hole 4 or the simulated riverbed 8, the dyed pollutant migration can be qualitatively observed, the sampling detection can be carried out from the sampling hole, if only qualitative judgment is needed, the pollutant can be dyed, the flow direction of the pollutant is observed, and if quantitative judgment is needed, sampling analysis is carried out from the pollutant injection hole.
Example 1
An experimental device for researching migration rule of pollutants under interaction of rivers and underground water comprises: a simulation water tank 3 for simulating filling of an aquifer and an aeration zone; the simulation water tank 3 is of a stepped structure, and the left side and the right side of the bottom of the simulation water tank 3 are respectively provided with a water outlet switch 6 which can collect and recycle water discharged from the simulation water tank 3; the top of the simulation water tank 3 is provided with a groove for installing a simulation riverbed 8, the groove is uniformly provided with a plurality of riverbed drain holes 10, and the riverbed drain holes 10 are used for draining redundant water in the simulation water tank 3; a pollutant injection hole 4 is arranged on the side wall of the simulated water tank 3 and can be used for injecting pollutants into the simulated water tank 3; a water sprayer 9 is also arranged above the simulation water tank 3, and the water sprayer 9 is connected with an external water pipe and is used for increasing precipitation conditions and changing precipitation intensity; the water sprayer 9 is uniformly provided with a plurality of spraying holes which are used for uniformly spraying water to the simulation water tank 3.
The movable water tank 1 is used for controlling a left water head of the simulation water tank 3; the movable water tank 1 is arranged at the left side of the simulation water tank 3, the height of the movable water tank 1 can be adjusted, and the height of the movable water tank 1 can be integrally changed upwards; a perforated plate is arranged at the position where the movable water tank 1 is communicated with the simulation water tank 3.
A fixed water tank 5 for controlling the right side water head of the analog water tank 3; peristaltic pumps 7 for pumping water are respectively arranged outside the movable water tank 1 and the fixed water tank 5, and a water pump for pumping water is arranged outside the simulated riverbed 8.
The simulated riverbed 8 is arranged in the groove at the upper part of the simulated water tank 3; the simulated riverbed 8 is made of organic glass and has a three-piece isosceles trapezoid structure, as shown in fig. 2. A plurality of riverbed permeable holes 11 are uniformly distributed on the simulated riverbed 8, and the aperture of each riverbed permeable hole 11 is smaller than the particle size of the aquifer quartz sand.
Carrying out acid washing and alkali washing on quartz sand with the particle size of 300nm, drying after overnight, uniformly filling the quartz sand in a simulated water tank 3, filling sandy soil with a certain thickness above the quartz sand after filling the quartz sand with a certain thickness, and properly shaking during filling to ensure uniform filling; in the sand filling process, a simulated riverbed 8 made of organic glass is placed in a groove at the top of the simulated water tank 3, and the periphery of the simulated riverbed can be wrapped and fixed by fillers such as quartz sand and the like; starting the peristaltic pump 7 for pumping water of the left movable water tank 1 and the peristaltic pump 7 for pumping water of the right fixed water tank 5, adjusting the height difference of the left movable water tank 1 and the right fixed water tank 5 to enable the water head difference to be 10cm, and continuously stabilizing for 3 hours to form a stable flow field; in order to increase the simulation under the precipitation condition, the size of the water drencher 9 can be adjusted to be 10 mm/d;
and (3) opening a water pump for pumping water to the simulated riverbed 8, simulating the river at the flow speed of 0.1mL/min, keeping the speed for 30min, stabilizing the water flow field, injecting the dyed n-hexane pollutant solution into the simulated water tank 3 from the lowest pollutant injection hole 4 by using a syringe, and qualitatively observing the migration of pollutants.
Example 2
An experimental device for researching migration rule of pollutants under interaction of rivers and underground water comprises: a simulation water tank 3 for simulating filling of an aquifer and an aeration zone; the simulation water tank 3 is of a stepped structure, and the left side and the right side of the bottom of the simulation water tank 3 are respectively provided with a water outlet switch 6 which can collect and recycle water discharged from the simulation water tank 3; the top of the simulation water tank 3 is provided with a groove for installing a simulation riverbed 8, the groove is uniformly provided with a plurality of riverbed drain holes 10, and the riverbed drain holes 10 are used for draining redundant water in the simulation water tank 3; a pollutant injection hole 4 is arranged on the side wall of the simulated water tank 3 and can be used for injecting pollutants into the simulated water tank 3; a water sprayer 9 is also arranged above the simulation water tank 3, and the water sprayer 9 is connected with an external water pipe and is used for increasing precipitation conditions and changing precipitation intensity; the water sprayer 9 is uniformly provided with a plurality of spraying holes which are used for uniformly spraying water to the simulation water tank 3.
The movable water tank 1 is used for controlling a left water head of the simulation water tank 3; the movable water tank 1 is arranged at the left side of the simulation water tank 3, the height of the movable water tank 1 can be adjusted, and the height of the movable water tank 1 can be integrally changed upwards; a turbulator is arranged at the communication position of the movable water tank 1 and the simulation water tank 3.
A fixed water tank 5 for controlling the right side water head of the analog water tank 3; peristaltic pumps 7 for pumping water are respectively arranged outside the movable water tank 1 and the fixed water tank 5, and a water pump for pumping water is arranged outside the simulated riverbed 8.
The simulated riverbed 8 is arranged in the groove at the upper part of the simulated water tank 3; the simulated riverbed 8 is made of organic glass and has a three-piece isosceles trapezoid structure, as shown in fig. 2. A plurality of riverbed permeable holes 11 are uniformly distributed on the simulated riverbed 8, and the aperture of each riverbed permeable hole 11 is smaller than the particle size of the aquifer quartz sand.
And (2) carrying out acid washing and alkali washing on quartz sand with the particle size of 200nm, drying after the overnight, uniformly filling the quartz sand into the simulated water tank 3, filling sandy soil with a certain thickness above the quartz sand after filling the quartz sand with a certain thickness, and properly shaking during filling to ensure uniform filling.
In the sand filling process, a simulated riverbed 8 made of organic glass is placed in a groove at the top of the simulated water tank 3, and the periphery of the simulated riverbed can be wrapped and fixed by fillers such as quartz sand and the like; starting a peristaltic pump 7 for pumping water in the left movable water tank 1 and a peristaltic pump 7 for pumping water in the right fixed water tank 5, adjusting the height difference between the left movable water tank 1 and the right fixed water tank 5 to enable the water head difference to be 10cm, and after the water head difference is continuously stabilized for 3 hours, forming a stable flow field by the system and forming a stable water flow field by the system; to increase the simulation under precipitation conditions, the size of the sprinkler 9 can be adjusted to 10 mm/d.
And (3) opening a water pump for pumping water to the simulated riverbed 8, simulating the river at the flow speed of 0.2mL/min, keeping the speed for 30min, stabilizing the water flow field, injecting the dyed n-hexane pollutant solution into the simulated water tank 3 from the upper part of the simulated riverbed 8, sampling from a pollutant injection opening at the lower part every 20min, and finally detecting by using a gas phase.
Example 3
An experimental device for researching migration rule of pollutants under interaction of rivers and underground water comprises: a simulation water tank 3 for simulating filling of an aquifer and an aeration zone; the simulation water tank 3 is of a stepped structure, and the left side and the right side of the bottom of the simulation water tank 3 are respectively provided with a water outlet switch 6 which can collect and recycle water discharged from the simulation water tank 3; the top of the simulation water tank 3 is provided with a groove for installing a simulation riverbed 8, the groove is uniformly provided with a plurality of riverbed drain holes 10, and the riverbed drain holes 10 are used for draining redundant water in the simulation water tank 3; a pollutant injection hole 4 is arranged on the side wall of the simulated water tank 3 and can be used for injecting pollutants into the simulated water tank 3; a water sprayer 9 is also arranged above the simulation water tank 3, and the water sprayer 9 is connected with an external water pipe and is used for increasing precipitation conditions and changing precipitation intensity; the water sprayer 9 is uniformly provided with a plurality of spraying holes which are used for uniformly spraying water to the simulation water tank 3.
The movable water tank 1 is used for controlling a left water head of the simulation water tank 3; the movable water tank 1 is arranged at the left side of the simulation water tank 3, the height of the movable water tank 1 can be adjusted, and the height of the movable water tank 1 can be integrally changed upwards; a perforated plate is arranged at the position where the movable water tank 1 is communicated with the simulation water tank 3.
A fixed water tank 5 for controlling the right side water head of the analog water tank 3; peristaltic pumps 7 for pumping water are respectively arranged outside the movable water tank 1 and the fixed water tank 5, and a water pump for pumping water is arranged outside the simulated riverbed 8.
The simulated riverbed 8 is arranged in the groove at the upper part of the simulated water tank 3; the simulated riverbed 8 is made of organic glass and has a three-piece isosceles trapezoid structure, as shown in fig. 2. A plurality of riverbed permeable holes 11 are uniformly distributed on the simulated riverbed 8, and the aperture of each riverbed permeable hole 11 is smaller than the particle size of the quartz sand of the aquifer; carrying out acid washing and alkali washing on quartz sand with the particle size of 300nm, drying after overnight, uniformly filling the quartz sand in a simulated water tank 3, filling sandy soil with a certain thickness above the quartz sand after filling the quartz sand with a certain thickness, and properly shaking during filling to ensure uniform filling; in the sand filling process, a simulated riverbed 8 made of organic glass is placed in a groove at the top of the simulated water tank 3, and the periphery of the simulated riverbed can be wrapped and fixed by fillers such as quartz sand and the like; starting the peristaltic pump 7 for pumping water of the left movable water tank 1 and the peristaltic pump 7 for pumping water of the right fixed water tank 5, adjusting the height difference of the left movable water tank 1 and the right fixed water tank 5 to enable the water head difference to be 10cm, and continuously stabilizing for 3 hours to form a stable flow field; to increase the simulation under precipitation conditions, the size of the sprinkler 9 can be adjusted to 15 mm/d.
And (3) opening a water pump for pumping water to the simulated riverbed 8, simulating the river at the flow speed of 0.3mL/min, keeping the speed for 30min, stabilizing the water flow field, injecting the dyed n-hexane pollutant solution into the simulated water tank 3 from the lowest pollutant injection hole 4 by using a syringe, and qualitatively observing the migration of pollutants.
The invention installs the simulation riverbed 8 in the simulation flume 3, changes the depth of the water level in the simulation riverbed 8 by adjusting the water injection speed of the water pump, and changes the interaction relation between the surface water and the underground water according to the water head difference and the precipitation intensity at two sides, thereby changing the underground water flow field; the influence of polluted rivers on underground water can be simulated by directly injecting pollutants from the simulated riverbed 8, and the migration rule of pollutants under various interaction conditions of the rivers and the underground water can be simulated by injecting the pollutants from the pollutant injection holes 4 on the side wall of the simulated water tank 3; the experimental device has the characteristics of repeatability and strong operability, and has a wide application prospect.
The invention is suitable for researching the migration rule of pollutants in the groundwater under the condition that the surface runoff is very rich or the river and the groundwater are mutually supplemented under the condition of long-term drought and water shortage.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (11)
1. The utility model provides an experimental apparatus for research pollutant migration rule under river and groundwater interact which characterized in that includes: the simulation water tank is used for simulating and filling the aquifer and the aeration zone;
the movable water tank is used for controlling a left water head of the simulation water tank;
the fixed water tank is used for controlling a right water head of the simulation water tank;
the simulated riverbed is arranged in the groove at the upper part of the simulated water tank.
2. The experimental device for researching migration rule of pollutants under interaction of river and underground water as claimed in claim 1, wherein the simulated water tank is of a stepped structure, and the left side and the right side of the bottom of the simulated water tank are respectively provided with a water outlet switch.
3. The experimental device for researching the transport rule of pollutants under the interaction of rivers and underground water as claimed in claim 2, wherein the top of the simulated water tank is provided with a groove for installing a simulated riverbed, and the groove is uniformly provided with a plurality of riverbed drainage holes.
4. The experimental device for researching migration rule of pollutants under interaction of river and underground water as claimed in claim 3, wherein pollutant injection holes are formed on the side wall of the simulated water tank.
5. The experimental device for researching migration rule of pollutants under interaction of river and underground water as claimed in claim 4, wherein a water sprayer is further installed above the simulated water tank, and the water sprayer is connected with an external water pipe.
6. The experimental device for researching migration rule of pollutants under interaction of river and underground water as claimed in claim 4, wherein a plurality of spraying holes are uniformly formed on the water sprayer.
7. The experimental facility for researching the migration rule of pollutants under the interaction of rivers and underground water as claimed in claim 1, wherein the movable water tank is installed at the left side of the simulated water tank, and the height of the movable water tank is adjustable.
8. The experimental device for researching the migration rule of pollutants under the interaction of rivers and underground water as claimed in claim 7, wherein a porous plate or a turbulator is arranged at the communication part of the movable water tank, the fixed water tank and the simulation water tank.
9. The experimental device for researching migration rule of pollutants under interaction of river and underground water as claimed in claim 1, wherein the simulated riverbed is made of organic glass and is in the form of three-piece isosceles trapezoid structure.
10. The experimental device for researching the transport rule of pollutants under the interaction of rivers and underground water as claimed in claim 9, wherein a plurality of riverbed water permeable holes are uniformly distributed on the simulated riverbed, and the pore diameter of the riverbed water permeable holes is smaller than the particle diameter of the aquifer quartz sand.
11. The experimental device for researching the transport rule of pollutants under the interaction of rivers and underground water as claimed in claim 1, wherein peristaltic pumps for pumping water are respectively arranged outside the movable water tank and the fixed water tank, and a water pump for pumping water is arranged outside the simulated riverbed.
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| CN113447400A (en) * | 2021-05-31 | 2021-09-28 | 长江大学 | Device and method for simulating phosphorus migration and conversion of groundwater in riparian zone |
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