CN103543249B - Experimental device and experimental method used for research of thin film water migration laws - Google Patents
Experimental device and experimental method used for research of thin film water migration laws Download PDFInfo
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- CN103543249B CN103543249B CN201310483018.7A CN201310483018A CN103543249B CN 103543249 B CN103543249 B CN 103543249B CN 201310483018 A CN201310483018 A CN 201310483018A CN 103543249 B CN103543249 B CN 103543249B
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Abstract
The invention discloses an experimental method used for research of thin film water migration laws. The experimental method comprises following steps: experimental soil sample is delivered into a soil column in layers; ionized water with a certain concentration is delivered into a water supply device, and a small amount of plant oil is added for oil seal of the ionized water; a certain amount of water is added into the water supply device every a period of time so as to ensure that the water level is higher than a buffer layer of the soil column; in experimental processes, data acquired by a humidity temperature sensor is sent to a data acceptance and analysis system via a wireless data sent terminal for analysis; and a certain period of time later, the soil is sampled for another time so as to measure water content and ion concentration of soil of different depth. The experimental method is capable of realizing accurate research on thin film water migration rate under different soil conditions, so that reliable experimental base is provided for research of water migration of soil in arid areas. The invention also discloses an experimental device used for the experimental method which is used for research of thin film water migration.
Description
Technical field
The present invention relates to soil-water environment experiment test field, is a kind of experimental provision and method of Study of Thin film water migration rule specifically.
Background technology
In the research of these four kinds of water of atmospheric precipitation, surface water, the holard and underground water, the research of the holard is relatively less, and pellicular water is the ingredient of the holard, and its locomotory mechanism it be unclear that, so arid soil water carrys out source problem and still there is much controversy.Existing research shows, arid biogeographic zone precipitation is difficult to be seeped into certain depth in soil, and the holard is mainly by the recharge of ground water.Underground water can only arrive certain altitude by capillary water supply and just not increase; Up walk, pellicular water migration plays a major role again.Probe into the migration rule of pellicular water under the change of moisture gradient, ion concentration gradient and temperature there is very high scientific research value and application prospect putting contrived experiment device and experimental technique before this.
Summary of the invention
Technical matters to be solved by this invention, for the defect in aforementioned background art and deficiency, a kind of experimental provision and method of Study of Thin film water migration rule are provided, it can be remained by in-house laboratory investigation academic circles at present and carry out source problem at the arid soil water of dispute, provides the pellicular water migration rule under different soils environment more intuitively.
The present invention is for solving above technical matters, and the technical scheme adopted is:
An experimental provision for Study of Thin film water migration, comprises earth pillar cylinder, water device for supplying, humidity temperature pickup, wireless data transmission terminal, data receiver and disposal system and soil sample barrel, and described earth pillar cylinder comprises experiment soil sample layer and cushion; Described water device for supplying is connected with earth pillar cylinder by conduit, device sidewall is carved with upper and lower two and determines level scale line, and the lower cushion determining level scale line and earth pillar cylinder is contour, and the distance between upper and lower scale mark is 5cm; Described humidity temperature pickup is multiple, and described multiple humidity temperature pickup is axially distributed on earth pillar cylinder inwall along earth pillar cylinder, is connected to wireless data transmission terminal by data bus; Wireless data transmission terminal comprises analog-to-digital conversion module and wireless data transmission module; In experimentation, humidity temperature pickup responds to the temperature and humidity information of each soil layer respectively, by wire, simulating signal is sent to the analog-to-digital conversion module of wireless data transmission terminal, then by wireless data transmission module, data message is sent to disposal system; Described soil sample barrel comprises by built-in bolted short tube and metal sampler groove.
As preferably, above-mentioned earth pillar cylinder adopts the plastic pipe that tensile strength is larger to make, and interface adopts sealing property and the good sealant sealing of anti-time ageing properties.
The overall length of above-mentioned soil sample barrel can be regulated by increase and decrease short tube, and easy layering soil sampling, decrease the disturbance to soil layer relative to common Luoyang Spade, sampling depth is more accurate.
The caliber of the cushion of above-mentioned earth pillar cylinder is greater than the caliber of soil sample test layer.
As preferably, described multiple humidity temperature pickup is distributed on earth pillar cylinder inwall by every 10cm mono-.
An experimental technique for Study of Thin film water migration rule, comprises the following steps:
(A) step: load the coarse gravel that particle diameter is 6-8mm in the bottom buffer layer of earth pillar cylinder; And, water permeability good geotextile identical with earth pillar cylinder internal diameter with diameter lies on the particle of cushion, load the soil sample of certain granules grating subsequently by certain porosity layering, every layer of 10cm, is filled to specified altitude assignment;
(B) step: be communicated with earth pillar cylinder by conduit by water device for supplying, adds in water device for supplying that finite concentration ionized water is supreme determines level scale line, and then injects a small amount of vegetable oil and carry out oil sealing to water body, prevents moisture from evaporating; Whenever water device for supplying water level decreasing to close to lower determine level scale line time, determine level scale line to water filling under the oil sealing layer of water device for supplying to upper with syringe, and record the moment of each water filling and the water yield of injection;
(C) step: the temperature and humidity data every other day being recorded the different depth soil body in experimentation by the humidity temperature pickup on earth pillar cylinder inwall;
(D) step: be contrast experiment with multiple identical device, only need change ionized water concentration, other operations are identical;
(E) step: Therapy lasted is after month, respectively each device is sampled with soil sample barrel, every 10cm sampling once, measure water percentage and the ion concentration of each sample respectively, by water injection rate data and temperature humidity over time rule and soil sample ion concentration with the migration rule of the analysis of distribution pellicular water of soil layer;
Specific analytical method is as follows:
First, according to water injection rate data, the speed that water outlet enters the soil body can be obtained
,
, wherein,
the water yield entering the soil body, in ml,
for this water yield enters the time of soil body consumption,
for soil body floorage in earth pillar cylinder;
Secondly, by the weight moisture capacity data obtained, can obtain the height of pellicular water rising and the porous media of each elevation, the soil layer height that pellicular water lifting height H is 1% with weight moisture capacity is as the criterion; By the weight moisture capacity individual-layer data comparative analysis of different time, the pellicular water migration rate under different water cut gradient can be obtained
, wherein,
for the water cut of the above soil body of Z height in earth pillar cylinder,
for the soil body dry unit weight of unit height in earth pillar cylinder,
earth pillar cylinder inner height is the soil body volumetric water content of z;
Finally, by pellicular water migration rate contrast in earth pillar cylinder under varying environment temperature conditions, the impact that temperature is migrated on pellicular water is drawn; By pellicular water migration rate contrast in the earth pillar cylinder of interpolation different ions concentration water, draw the impact of ion concentration on pellicular water migration rate.
beneficial effect: the present invention has the following advantages: scientific structure design is reasonable, can temperature and humidity data in Real-time Obtaining pellicular water migration experimentation, substantially increases scientific research efficiency.By the migration rule of Study of Thin film water that the experimental provision described in this patent of invention and experimental technique can be more accurate, there is very high scientific research value and application prospect, provide experiment basis for arid soil water transport moves law study.
Accompanying drawing explanation
Fig. 1 is experimental provision structural representation of the present invention;
Wherein, 1, earth pillar cylinder; 2, water device for supplying; 3, humidity temperature pickup; 4, wireless data transmission terminal; 5, data receiver and disposal system; 6, soil sample barrel.
Embodiment
Below with reference to accompanying drawing, technical scheme of the present invention is described in detail.
As shown in Figure 1, the invention provides a kind of experimental provision of Study of Thin film water migration rule, comprise earth pillar cylinder 1, water device for supplying 2, humidity temperature pickup 3, wireless data transmission terminal 4, data receiver and disposal system 5 and soil sample barrel 6, described earth pillar cylinder 1 comprises top experiment soil sample layer and lower buffer layer, and buffer inner diameter is greater than experiment soil sample layer internal diameter; Described water device for supplying 2 is connected by the lower buffer layer of conduit with earth pillar cylinder 1, device sidewall is carved with upper and lower two and determines level scale line, and the lower cushion determining level scale line and earth pillar cylinder is contour, and the distance between upper and lower scale mark is 5cm; Described humidity temperature pickup 3 is distributed on earth pillar cylinder inwall by every 10cm mono-, is connected to wireless data transmission terminal 4 by data bus; Wireless data transmission terminal 4 comprises analog-to-digital conversion module and wireless data transmission module; In experimentation, humidity temperature pickup 3 responds to the temperature and humidity information of each soil layer in earth pillar cylinder 1 respectively, by wire, simulating signal is sent to the analog-to-digital conversion module of wireless data transmission terminal 1, then by wireless data transmission module, data message is sent to data receiver and disposal system 5; Described soil sample barrel 6 comprises by built-in bolted short tube and metal sampler groove.
The present invention also provides a kind of experimental technique of Study of Thin film water migration rule, comprises the following steps:
(A) step, in the bottom buffer layer of earth pillar cylinder 1, load the coarse gravel that particle diameter is 6-8mm; And, water permeability good geotextile identical with earth pillar cylinder 1 internal diameter with diameter lies on the particle of cushion, load the soil sample of certain granules grating subsequently by certain porosity layering, every layer of 10cm, is filled to specified altitude assignment; (herein " " porosity " " grain composition " " specified altitude assignment " can experimentally to require and the operating mode of experimental simulation carries out sets itself).
(B) step, water device for supplying 2 is communicated with by the lower buffer layer of conduit with earth pillar cylinder 1, in water device for supplying 2, add that ionized water is supreme determines level scale line, then at injection a small amount of vegetable oil, oil sealing carried out to water body, prevent moisture from evaporating; Whenever water device for supplying water level decreasing to close to lower determine level scale line time, determine level scale line to water filling under the oil sealing layer of water device for supplying to upper with syringe, and record the moment of each water filling and the water yield of injection;
(C) the temperature and humidity data of the different depth soil body are every other day recorded in step, experimentation by the humidity temperature pickup 3 on earth pillar cylinder 1 inwall;
(D) step, be contrast experiment with multiple identical device, only need change ionized water concentration, other operations are identical;
(E) step, Therapy lasted are about after one month, respectively each device is sampled with soil sample barrel 6, every 10cm sampling once, measure water percentage and the ion concentration of each sample respectively, by water injection rate data and temperature humidity over time rule and soil sample ion concentration with the migration rule of the analysis of distribution pellicular water of soil layer;
Specific analytical method is as follows:
First, according to water injection rate data, the speed that water outlet enters the soil body can be obtained
,
, wherein,
the water yield entering the soil body, in ml,
for this water yield enters the time of soil body consumption,
for soil body floorage in earth pillar cylinder;
Secondly, by the weight moisture capacity data obtained, can obtain the height of pellicular water rising and the porous media of each elevation, the soil layer height that pellicular water lifting height H is 1% with weight moisture capacity is as the criterion; By the weight moisture capacity individual-layer data comparative analysis of different time, the pellicular water migration rate under different water cut gradient can be obtained
, wherein,
for the water cut of the above soil body of Z height in earth pillar cylinder,
for the soil body dry unit weight of unit height in earth pillar cylinder,
earth pillar cylinder inner height is the soil body volumetric water content of z;
Finally, by pellicular water migration rate contrast in earth pillar cylinder under varying environment temperature conditions, the impact that temperature is migrated on pellicular water is drawn; By pellicular water migration rate contrast in the earth pillar cylinder of interpolation different ions concentration water, draw the impact of ion concentration on pellicular water migration rate.
By this method, the migration rule of Study of Thin film water that can be more scientific and reasonable, simultaneously can be more accurate determine under the impact of different water cut gradient, ion concentration and environment temperature, the migration rate of pellicular water in the soil body.
Claims (5)
1. the experimental technique based on Study of Thin film water migration rule experimental provision, this experimental provision comprises earth pillar cylinder, water device for supplying, humidity temperature pickup, wireless data transmission terminal, data receiver and disposal system and soil sample barrel, wherein, described earth pillar cylinder comprises experiment soil sample layer and cushion; Described water device for supplying is connected with earth pillar cylinder by conduit, device sidewall is carved with upper and lower two and determines level scale line, and the lower cushion determining level scale line and earth pillar cylinder is contour, and the distance between upper and lower scale mark is 5cm; Described humidity temperature pickup is multiple, and described multiple humidity temperature pickup is axially distributed on earth pillar cylinder inwall along earth pillar cylinder, is connected to wireless data transmission terminal by data bus; Wireless data transmission terminal comprises analog-to-digital conversion module and wireless data transmission module; In experimentation, humidity temperature pickup responds to the temperature and humidity information of each soil layer respectively, by wire, simulating signal is sent to the analog-to-digital conversion module of wireless data transmission terminal, then by wireless data transmission module, data message is sent to disposal system; Described soil sample barrel comprises by built-in bolted short tube and metal sampler groove;
It is characterized in that comprising the following steps:
(A) step: load the coarse gravel that particle diameter is 6-8mm in the bottom buffer layer of earth pillar cylinder; And, water permeability good geotextile identical with earth pillar cylinder internal diameter with diameter lies on the particle of cushion, load the soil sample of certain granules grating subsequently by certain porosity layering, every layer of 10cm, is filled to specified altitude assignment;
(B) step: be communicated with earth pillar cylinder by conduit by water device for supplying, adds in water device for supplying that finite concentration ionized water is supreme determines level scale line, and then injects a small amount of vegetable oil and carry out oil sealing to water body, prevents moisture from evaporating; Whenever water device for supplying water level decreasing to close to lower determine level scale line time, determine level scale line to water filling under the oil sealing layer of water device for supplying to upper with syringe, and record the moment of each water filling and the water yield of injection;
(C) step: the temperature and humidity data every other day being recorded the different depth soil body in experimentation by the humidity temperature pickup on earth pillar cylinder inwall;
(D) step: be contrast experiment with multiple identical device, only need change ionized water concentration, other operations are identical;
(E) step: Therapy lasted is after month, respectively each device is sampled with soil sample barrel, every 10cm sampling once, measure water percentage and the ion concentration of each sample respectively, by water injection rate data and temperature humidity over time rule and soil sample ion concentration with the migration rule of the analysis of distribution pellicular water of soil layer;
Specific analytical method is as follows:
First, according to water injection rate data, the speed that water outlet enters the soil body can be obtained
,
, wherein,
the water yield entering the soil body, in ml,
for this water yield enters the time of soil body consumption,
for soil body floorage in earth pillar cylinder;
Secondly, by the weight moisture capacity data obtained, can obtain the height of pellicular water rising and the porous media of each elevation, the soil layer height that pellicular water lifting height H is 1% with weight moisture capacity is as the criterion; By the weight moisture capacity individual-layer data comparative analysis of different time, the pellicular water migration rate under different water cut gradient can be obtained
, wherein,
for the water cut of the above soil body of Z height in earth pillar cylinder,
for the soil body dry unit weight of unit height in earth pillar cylinder,
earth pillar cylinder inner height is the soil body volumetric water content of z;
Finally, by pellicular water migration rate contrast in earth pillar cylinder under varying environment temperature conditions, the impact that temperature is migrated on pellicular water is drawn; By pellicular water migration rate contrast in the earth pillar cylinder of interpolation different ions concentration water, draw the impact of ion concentration on pellicular water migration rate.
2. according to claim 1 based on the experimental technique of Study of Thin film water migration rule experimental provision, it is characterized in that adopting the plastic pipe that tensile strength is larger to make in earth pillar cylinder, interface adopts sealing property and the good sealant sealing of anti-time ageing properties.
3., according to claim 2 based on the experimental technique of Study of Thin film water migration rule experimental provision, it is characterized in that the overall length of soil sample barrel is regulated by increase and decrease short tube.
4., according to claim 3 based on the experimental technique of Study of Thin film water migration rule experimental provision, it is characterized in that the caliber of the cushion of earth pillar cylinder is greater than the caliber of soil sample test layer.
5., according to claim 4 based on the experimental technique of Study of Thin film water migration rule experimental provision, it is characterized in that described multiple humidity temperature pickup is distributed on earth pillar cylinder inwall by every 10cm mono-.
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| CN105510553A (en) * | 2015-12-22 | 2016-04-20 | 江西理工大学 | Testing device and method for researching migration and transformation rule of nitrogen in ion-absorbed rare earth mine |
| CN106123964B (en) * | 2016-08-05 | 2018-06-26 | 浙江陆特能源科技股份有限公司 | Ground source rock soil layer vertical temperature distribution test and underground water level measurement device |
| CN107462506B (en) * | 2017-07-19 | 2018-11-30 | 中国水利水电科学研究院 | Frozen soil interflow water source type detection method based on tracer technique |
| CN111830235B (en) * | 2020-06-17 | 2022-07-12 | 安徽理工大学 | Frozen soil model and method for constructing frozen soil moisture migration model |
| CN112834564B (en) * | 2021-03-02 | 2024-10-15 | 中国海洋大学 | Test method for adjusting soil temperature |
| CN112858639B (en) * | 2021-03-07 | 2024-03-01 | 昆明理工大学 | Device for simulating longitudinal migration of heavy metals in actual soil environment |
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| CN202281773U (en) * | 2011-11-07 | 2012-06-20 | 中国科学院地理科学与资源研究所 | Unsaturation water supply device for simulating underground water |
| CN202502646U (en) * | 2012-03-20 | 2012-10-24 | 河海大学 | Seepage failure phenomenon experimental device |
| CN103091473A (en) * | 2013-02-01 | 2013-05-08 | 中国农业科学院农业资源与农业区划研究所 | Earth pillar simulation device based on soil water and salt transport rule |
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| CN202281773U (en) * | 2011-11-07 | 2012-06-20 | 中国科学院地理科学与资源研究所 | Unsaturation water supply device for simulating underground water |
| CN202502646U (en) * | 2012-03-20 | 2012-10-24 | 河海大学 | Seepage failure phenomenon experimental device |
| CN103091473A (en) * | 2013-02-01 | 2013-05-08 | 中国农业科学院农业资源与农业区划研究所 | Earth pillar simulation device based on soil water and salt transport rule |
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