CN113189289B - Hydrodynamic force dispersion on-site measurement system - Google Patents
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- 239000006185 dispersion Substances 0.000 title claims abstract description 108
- 238000005259 measurement Methods 0.000 title claims abstract description 11
- 238000012360 testing method Methods 0.000 claims abstract description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 46
- 238000002347 injection Methods 0.000 claims abstract description 42
- 239000007924 injection Substances 0.000 claims abstract description 42
- 238000001514 detection method Methods 0.000 claims abstract description 40
- 239000000243 solution Substances 0.000 claims abstract description 23
- 239000000700 radioactive tracer Substances 0.000 claims abstract description 20
- 238000005553 drilling Methods 0.000 claims abstract description 16
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 6
- 239000011780 sodium chloride Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 19
- 230000008569 process Effects 0.000 abstract description 7
- 238000004458 analytical method Methods 0.000 abstract description 3
- 208000005189 Embolism Diseases 0.000 abstract description 2
- 238000012545 processing Methods 0.000 abstract description 2
- 230000035699 permeability Effects 0.000 description 49
- 230000008859 change Effects 0.000 description 15
- 238000004088 simulation Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 9
- 238000011065 in-situ storage Methods 0.000 description 3
- 239000012736 aqueous medium Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 230000003204 osmotic effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000036962 time dependent Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
- G01N33/1893—Water using flow cells
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
- G01N13/04—Investigating osmotic effects
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Abstract
The invention provides a hydrodynamic dispersion on-site measurement system, which comprises a fixing part, an injection system part, a embolism water filling part and a detection part, wherein the fixing part is connected with the injection system part; the fixing part comprises a first plug, a second plug and a third plug which sequentially penetrate into a drilling hole of a target area and longitudinally divide the drilling hole into an injection section and a detection section; the injection part comprises a water tank, a water pump, a valve, a pressure gauge and a flowmeter, and tracer solution is injected into the injection section through a drill rod connected with the water pump; the plug water filling part comprises a water tank, a water pump, a valve, a pressure gauge and a pressure release valve, and fills water into the plug through a guide pipe to expand the plug and fix the plug in a drilled hole; the detection part comprises a flowmeter, a pressure gauge, an ion sensor and an osmometer. According to the invention, the longitudinal dispersion and the transverse dispersion are determined according to two moments required for reaching the corresponding concentration by comparing with a chart, the parameter determination process is very simple, the operation is simple, and the complex data processing process is not involved; the invention has small error of test result and accurate and reliable analysis method.
Description
Technical Field
The invention relates to the field of hydrodynamic dispersion tests, in particular to a hydrodynamic dispersion on-site measurement system.
Background
The dispersion test is a hydrogeologic test for analyzing the solute transport rule in the aqueous medium and obtaining parameters such as the dispersion of the aqueous medium, is an important test in the research and application of the groundwater solute transport theory, and can be divided into an indoor test and an outdoor test.
The indoor dispersion test condition is easy to control, the test data is easy to obtain, and the success rate is high. However, the previous domestic and foreign researches show that the dispersion obtained by the test has a scale effect, namely the dispersion obtained by the field dispersion test is far greater than the value obtained by the indoor test, and the difference can be up to 4 to 5 orders of magnitude. Therefore, the data of the field dispersion test can reflect the migration characteristics of the pollutants in the actual condition, and the field dispersion test is often required for some field practical problems with high accuracy.
The existing field hydrodynamic dispersion test has long test period, needs to be provided with a plurality of holes, consumes a long time and has large engineering quantity. Meanwhile, the existing test method mainly solves the dispersion coefficient or dispersion degree by measuring the change of the concentration of the tracer in the well along with time and by an analytic method, a linear graph method, a fitting method and the like. The solving process is complicated, and the technical requirement is high.
Disclosure of Invention
According to the technical problems of large test engineering quantity, complex solving process and the like of the field hydrodynamic dispersion test, the hydrodynamic dispersion on-site measuring system is provided. The invention can be used to determine permeability coefficient, longitudinal dispersion and transverse dispersion.
The invention adopts the following technical means:
the hydrodynamic dispersion on-site measurement system comprises a fixing part, an injection system part, a embolism water filling part and a detection part;
the fixing part comprises a first plug, a second plug and a third plug which sequentially penetrate into a drilling hole of the target area and longitudinally divide the drilling hole into an injection section and a detection section; the first plug and the second plug are connected through a first hollow metal rod, a plurality of small holes are formed in the first hollow metal rod, and the first hollow metal rod is connected with an injection section ion sensor and an injection section osmometer through the small holes; the second plug and the third plug are connected through a second hollow metal rod, and the second hollow metal rod is provided with a sealing interface which is connected with a detection section osmometer and a detection section ion sensor;
the injection part comprises a first water tank, a first water pump and a first valve, the first water pump is connected to the drill rod, and the tracer solution in the first water tank is injected into the injection section;
the plug water filling part comprises a second water tank, a second water pump, a second valve and a pressure release valve, and fills water to each plug through a guide pipe to expand the plug and fix the plug in a drill hole, and after the test is finished, the pressure release valve is opened to shrink each plug;
the detection part comprises a first pressure gauge and a flowmeter arranged behind the first valve, a second pressure gauge, a detection section osmometer, a detection section ion sensor, an injection section ion sensor and an injection section osmometer which are arranged behind the second valve, wherein connecting wires of the detection section osmometer, the detection section ion sensor (19), the injection section ion sensor and the injection section osmometer pass through a sealing binding post, penetrate through a first plug and a second plug, and are connected with a reader on the ground.
Further, the first plug, the second plug and the third plug are all cylindrical plugs, and the radius is the same as the drilling radius.
Further, the length of the first plug, the second plug, and the third plug is 10 times the borehole diameter.
Further, the target region is a representative geological region selected based on in-situ geological and hydrographic data.
Further, the tracer solution is 4000mol/m 3 Is a solution of NaCl.
The invention also provides a hydrodynamic dispersion on-site measurement method, which is realized based on the system of any one of the above steps:
determining the change of flow and concentration with time according to the test;
establishing a numerical model by taking field conditions as a background, setting different working conditions, and obtaining the change conditions of flow and concentration under the conditions of different permeability coefficients, longitudinal dispersion and transverse dispersion to obtain a corresponding relation diagram;
and determining the permeability coefficient, the longitudinal dispersion and the transverse dispersion according to the corresponding relation diagram and the time-dependent change of the flow and the concentration determined by the test.
Further, determining the change in flow and concentration over time from the test includes:
preparing a tracer solution with a certain concentration;
injecting a tracer solution into the injection section at a constant pressure;
recording the flow and the concentration change of the detection section at intervals;
further, a numerical model is built by taking field conditions as a background, different working conditions are set, and under the conditions of different permeability coefficients, longitudinal dispersion and transverse dispersion, the change conditions of flow and concentration are obtained, and a corresponding relation diagram is obtained, wherein the method comprises the following steps:
setting a numerical simulation according to the geometric dimension of the test, wherein the pressure and the tracer concentration of the numerical simulation are consistent with the test;
setting different permeability coefficient values for numerical simulation to obtain values of flow under the condition of different permeability coefficients, and drawing a relation diagram of the permeability coefficients and the flow by taking the flow as an abscissa and the permeability coefficients as an ordinate;
the permeability coefficient is kept unchanged, different longitudinal dispersion and transverse dispersion are adjusted, and the concentration of the detection section respectively reaches 500mol/m under the combination of different longitudinal dispersion and transverse dispersion 3 And 1000mol/m 3 Time t of (2) 500 And t 1000 ；
Based on the obtained t under different permeability coefficients and longitudinal dispersion 500 Values, t, are plotted under different permeability coefficients, with time on the abscissa and longitudinal dispersion on the ordinate 500 Relationship as a function of longitudinal dispersion;
based on the obtained t under different permeability coefficients and longitudinal dispersion 1000 Values, t in the case of a longitudinal dispersion plotted on the time abscissa and on the lateral dispersion ordinate 1000 Relationship as a function of lateral dispersion.
Further, the permeation coefficient, longitudinal dispersion and transverse dispersion are determined from the corresponding relationship graphs and the time-dependent changes in flow and concentration determined by the test. Comprising the following steps:
according to the flow rate Q obtained by the test 0 In the graph of the relation between the permeability coefficient and the flow, the abscissa is determined to be Q 0 At the time, the corresponding ordinate k 0 The permeability coefficient of the test area is obtained;
in the longitudinal direction of the dispersion sum t 500 According to the permeability coefficient k 0 Determining that the abscissa is equal to t 500 When the corresponding ordinate alpha L0 The longitudinal dispersion is the required longitudinal dispersion;
lateral dispersion and t 1000 According to the longitudinal dispersion alpha L0 Selecting a curve corresponding to the longitudinal dispersion such that the abscissa is equal to t in the test 1000 Corresponding ordinate alpha T0 I.e. the required lateral dispersion.
Compared with the prior art, the invention has the following advantages:
the method for measuring the dispersity on site has the advantages of low requirement on the measuring field and small occupied area, and can shorten the test time and reduce the workload;
the invention proposes that the longitudinal dispersion and the transverse dispersion can be determined by comparing the graphs according to two moments required for reaching the corresponding concentrations. The parameter determination process is very simple, the operation is simple, and the complex data processing process is not involved;
the invention has small error of test result and accurate and reliable analysis method.
Based on the reasons, the invention can be widely popularized in the field of hydrodynamic field dispersion test.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic illustration of hydrodynamic friability measurement test in accordance with an embodiment of the present invention.
Fig. 2 is a graph of the relationship between the permeability coefficient and the flow rate in the present embodiment, which is drawn according to the flow rate data under different permeability coefficients obtained in the COMSOL numerical simulation.
FIG. 3 shows the longitudinal dispersion and t in an embodiment of the invention 500 According to the flow data under different permeability coefficients obtained in numerical simulationDrawing to obtain the final product.
FIG. 4 shows the lateral dispersion and t in an embodiment of the invention 1000 Is drawn according to the flow data under different permeability coefficients obtained in numerical simulation.
In the figure: 1. a first water tank; 2. a first water pump; 3. a first valve; 4. a first pressure gauge; 5. a flow meter; 6. a second water tank; 7. a second water pump; 8. a second valve; 9. a second pressure gauge; 10; a pressure release valve; 11. a water-filled conduit; 12. drilling holes; 13. a first plug; 14. an injection section; 15. a second plug; 16. a detection section; 17. a third plug; 18. a detection section osmometer; 19. a detection section ion sensor; 20. an injection section ion sensor; 21. an injection section osmometer; 22. a reader; 23. a drill rod; 24. and (5) drilling a machine.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
As shown in fig. 1, the present invention discloses a hydrodynamic dispersion on-site measurement system, which comprises a fixing part, an injection system part, a plug water filling part and a detection part. The fixing part comprises a first plug, a second plug and a third plug which sequentially penetrate into a drilling hole of the target area and longitudinally divide the drilling hole into an injection section and a detection section. Preferably, the first plug, the second plug and the third plug are all cylindrical plugs and have the same radius as the drilling radius. It is further preferred that the length of the first plug, the second plug and the third plug is 10 times the diameter of the borehole, ensuring that the parts of the borehole are isolated. In addition, the target region is a representative geologic region selected based on in-situ geologic and hydrographic data. The injection part comprises a drilling machine arranged on the ground, and a drill rod connected with the drilling machine through a water pumpThe tracer solution is injected into the injection section, and the preferred tracer solution is 4000mol/m 3 Is a solution of NaCl. The plug water filling part comprises a water pump, and fills water to the plug through the guide pipe so as to expand the plug and fix the plug in the drill hole. The detection part comprises a flowmeter, a pressure gauge and an ion sensor, wherein the flowmeter and the pressure gauge are arranged on a water pipe and used for measuring the flow and the pressure of the tracer solution, the ion sensor of the detection section is arranged in the detection section, and a connecting wire of the ion sensor passes through a sealing binding post, passes through a first plug and a second plug and is connected with a sensor terminal on the ground.
The invention also provides a hydrodynamic dispersion on-site measurement method, which is realized based on the system, and comprises the following steps:
s1, determining the change of flow and concentration with time according to a test. The method specifically comprises the following steps:
s101, performing numerical simulation through numerical simulation software to obtain the change rule of the concentration of the tracer in the detection section along with time. The method comprises the steps of injecting tracer solution into an injection section at a preset pressure according to the size of the corresponding device, simulating the diffusion range of the solution along with time, and obtaining the change of the concentration of the tracer in a detection section along with time. The input parameters include: osmotic coefficient, longitudinal dispersion, transverse dispersion, pressure of injection, tracer concentration. Wherein, the permeability coefficient is obtained according to the investigation report of the project pre-lapping stage.
S102, setting different permeability coefficient values for numerical simulation, obtaining the numerical value of flow under the condition of different permeability coefficients, and drawing a relation diagram of the permeability coefficients and the flow by taking the flow as an abscissa and the permeability coefficients as an ordinate;
s103, keeping the permeability coefficient unchanged, and adjusting the longitudinal dispersion and the transverse dispersion to obtain the concentration of the detection section reaching 500mol/m respectively under different combinations of the longitudinal dispersion and the transverse dispersion 3 And 1000mol/m 3 Time t of (2) 500 And t 1000 ；
S104, according to the obtained different permeability coefficient and t under the condition of longitudinal dispersion 500 Values, plotted on time abscissa and longitudinal dispersion on ordinate, are differentIn the case of permeability coefficient, t 500 Relationship as a function of longitudinal dispersion;
s105, according to the obtained different permeability coefficient and t under the condition of longitudinal dispersion 1000 Values, t in the case of a longitudinal dispersion plotted on the time abscissa and on the lateral dispersion ordinate 1000 Relationship as a function of lateral dispersion.
S2, establishing a numerical model by taking field conditions as a background, setting different working conditions, and obtaining corresponding relation diagrams under the conditions of different permeability coefficients, longitudinal dispersion and transverse dispersion and under the conditions of flow and concentration change. Comprising the following steps:
s201, obtaining flow Q according to test 0 In the graph of the relation between the permeability coefficient and the flow, the abscissa is determined to be Q 0 At the time, the corresponding ordinate k 0 The permeability coefficient of the test area is obtained;
s202, longitudinal dispersion sum t 500 According to the permeability coefficient k 0 Determining that the abscissa is equal to t 500 When the corresponding ordinate alpha L0 The longitudinal dispersion is the required longitudinal dispersion;
s203, transverse dispersion sum t 1000 According to the longitudinal dispersion alpha L0 Selecting a curve corresponding to the longitudinal dispersion such that the abscissa is equal to t in the test 1000 Corresponding ordinate alpha T0 I.e. the required lateral dispersion.
The method according to the invention is further described below with reference to a specific example of application.
And firstly, determining the change of flow and concentration along with time according to the designed on-site dispersion test device test. The method comprises the following steps:
based on the in-situ geology and hydrologic data, a typical geological region is selected, and a borehole of depth, in this example 75mm in diameter and 103m in depth, is excavated.
Three plugs are placed in sequence in the drill hole to a certain depth and are used for separating underground water in the drill hole and dividing the underground water into an injection section and a detection section. Arranging an ion sensor in the detection section, the ion sensor passing through a wireThe connecting sealing binding post is finally connected with an ion sensor reading meter on the ground through a plug. The water pipe of the water pump passes through the upper plug, and a flowmeter and a pressure gauge are arranged on the water pipe. The depth of the water pipe is controlled by the winch and the pulley. Ready 4000mol/m 3 Is a solution of NaCl. In the test process, the pressure of 2MPa is kept, and the NaCl solution is continuously injected into the injection section by a water pump. Readings of the flowmeter and the ion sensor are recorded at intervals to obtain water injection flow Q0, and the concentration of the detection section reaches 500mol/m 3 Time t of (2) 500 And the concentration of the detection section reaches 1000mol/m 3 Time t of (2) 1000 。
And secondly, establishing a numerical model by taking field conditions as a background, setting different working conditions, and obtaining the change conditions of flow and concentration under the conditions of different permeability coefficients, longitudinal dispersion and transverse dispersion to obtain a corresponding relation diagram. The method comprises the following steps:
according to the dispersion coefficient on-site measuring device, numerical simulation is carried out on the measuring method through numerical simulation software. The specific content is that the size of the corresponding device is adopted, the tracer solution is injected into the injection section at corresponding pressure, the diffusion range of the solution along with time is simulated, and the change of the concentration of the tracer in the detection section along with time is obtained. The input parameters of numerical simulation by adopting the comsol software finite element method include: osmotic coefficient, longitudinal dispersion, transverse dispersion, pressure of injection, tracer concentration.
Setting different permeability coefficient values for numerical simulation, obtaining the numerical value of flow under the condition of different permeability coefficients, taking the flow as an abscissa, taking the permeability coefficient as an ordinate, and drawing a relation diagram of the permeability coefficient and the flow, wherein the permeability coefficient is respectively adjusted by an order of magnitude up and down when a range is set according to the inside of a pre-lapping stage investigation report.
The permeability coefficient is kept unchanged, different longitudinal dispersion and transverse dispersion are adjusted, and the concentration of the detection section respectively reaches 500mol/m under the combination of different longitudinal dispersion and transverse dispersion 3 And 1000mol/m 3 Time t of (2) 500 And t 1000 . Wherein the longitudinal dispersion is 100-0.01, the transverse dispersion is 10-0.001, and the intervals are 10 timesAnd (5) respectively performing numerical simulation calculation.
And according to the obtained t500 value under the conditions of different permeability coefficients and longitudinal dispersion, drawing the relation of t500 changing along with the longitudinal dispersion under the conditions of different permeability coefficients by taking time as an abscissa and longitudinal dispersion as an ordinate.
And according to the obtained t1000 values under the conditions of different permeability coefficients and longitudinal dispersion, drawing the relation of t1000 under the condition of longitudinal dispersion along with the change of the transverse dispersion by taking time as an abscissa and taking the transverse dispersion as an ordinate.
Thirdly, the permeability coefficient, the longitudinal dispersion and the transverse dispersion are reversely pushed according to the flow obtained by the test and the time required for reaching 2 specific concentrations and the corresponding relation diagram. The permeability coefficient and the flow are in a linear relation, different permeability coefficients are set for numerical simulation, different flows are obtained, corresponding straight lines are drawn, and the permeability coefficient is reversely deduced according to the flow obtained through the test, and the method specifically comprises the following steps:
according to the flow rate Q0 obtained by the test, in fig. 2, let the abscissa equal to Q0, and the corresponding ordinate k0 is the permeability coefficient of the test zone.
Based on the permeability coefficient k0 obtained, a curve corresponding to the permeability coefficient is selected in FIG. 3, such that the abscissa is equal to t500 in the test, and the corresponding ordinate α L0 I.e. the longitudinal dispersion that is sought.
Based on the obtained longitudinal dispersion alpha L0 In FIG. 4, a curve corresponding to the longitudinal dispersion is selected such that the abscissa is equal to t in the test 1000 Corresponding ordinate alpha T0 The required lateral dispersion is obtained.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (4)
1. The hydrodynamic dispersion on-site measurement system is characterized by comprising a fixing part, an injection part, a plug water filling part and a detection part;
the fixing part comprises a first plug (13), a second plug (15) and a third plug (17) which sequentially penetrate into a target area and longitudinally divide the drill hole (12) into an injection section (14) and a detection section (16); the first plug (13) and the second plug (15) are connected through a first hollow metal rod, a plurality of small holes are formed in the first hollow metal rod, and the first hollow metal rod is connected with an injection section ion sensor (20) and an injection section osmometer (21) through the small holes; the second plug (15) and the third plug (17) are connected through a second hollow metal rod, and the second hollow metal rod is provided with a sealing interface which is connected with a detection section osmometer (18) and a detection section ion sensor (19);
the injection part comprises a first water tank (1), a first water pump (2) and a first valve (3), the first water pump (2) is connected to a drill rod (23) and the tracer solution in the first water tank (1) is injected into the injection section (14), the injection part also comprises a drilling machine arranged on the ground, and the tracer solution is injected into the injection section through the drill rod connected with the drilling machine by the first water pump (2);
the plug water filling part comprises a second water tank (6), a second water pump (7), a second valve (8) and a pressure relief valve (10), water is filled into each plug through a guide pipe, the plug is expanded and fixed in a drilling hole (12), and after the test is finished, the pressure relief valve (10) is opened to enable each plug to be contracted;
the detection part comprises a first pressure gauge (4) and a flow meter (5) which are arranged behind the first valve (3), a second pressure gauge (9) which is arranged behind the second valve (8), a detection section osmometer (18), a detection section ion sensor (19), an injection section ion sensor (20) and an injection section osmometer (21), wherein the connection lines of the detection section osmometer (18), the detection section ion sensor (19), the injection section ion sensor (20) and the injection section osmometer (21) pass through a first plug and a second plug through a sealing binding post, and are connected with a reader on the ground;
the first plug (13), the second plug (15) and the third plug (17) are all cylindrical plugs, and the radius is the same as the drilling radius.
2. Hydrodynamic dispersion field measurement system according to claim 1, wherein the length of the first plug (13), the second plug (15) and the third plug (17) is 10 times the borehole diameter.
3. The hydrodynamic dispersion field measurement system of claim 1, wherein the target area is a representative geologic area selected based on field geology and hydrographic data.
4. The hydrodynamic dispersion on-site measurement system according to claim 1, wherein the tracer solution is 4000mol/m 3 Is a solution of NaCl.
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| JP3065208B2 (en) * | 1994-02-22 | 2000-07-17 | 応用地質株式会社 | On-site permeability test equipment |
| CN103091229B (en) * | 2013-01-31 | 2014-12-31 | 河海大学 | Variable water head sectional permeation coefficient measuring equipment and measuring method |
| CN107328909B (en) * | 2017-06-22 | 2019-11-08 | 武汉大学 | Structural differences unsaturated soil hydrodynamic dispersion coefficient on-site measurement method |
| CN109958434B (en) * | 2017-12-25 | 2022-11-22 | 核工业北京地质研究院 | Drilling hydrogeological test method for drilling hole under constant pressure and unsteady flow |
| CN108444868A (en) * | 2018-04-07 | 2018-08-24 | 四川省地质工程勘察院 | Artesian aquifer Dispersion Test device and its test method |
| CN108756853A (en) * | 2018-06-04 | 2018-11-06 | 安徽理工大学 | A kind of across the hole groundwater velocity and direction of deep-well and geologic parameter measurement device and method |
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