CN110940607B - Near-surface water flux measuring system and measuring method - Google Patents
Near-surface water flux measuring system and measuring method Download PDFInfo
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- CN110940607B CN110940607B CN201911361309.2A CN201911361309A CN110940607B CN 110940607 B CN110940607 B CN 110940607B CN 201911361309 A CN201911361309 A CN 201911361309A CN 110940607 B CN110940607 B CN 110940607B
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- 230000004907 flux Effects 0.000 title claims abstract description 42
- 239000002352 surface water Substances 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title abstract description 15
- 239000002689 soil Substances 0.000 claims abstract description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 238000012806 monitoring device Methods 0.000 claims abstract description 32
- 238000001514 detection method Methods 0.000 claims abstract description 31
- 238000005259 measurement Methods 0.000 claims abstract description 23
- 238000000691 measurement method Methods 0.000 claims abstract description 5
- 230000008859 change Effects 0.000 claims description 9
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 6
- 239000004917 carbon fiber Substances 0.000 claims description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 239000002041 carbon nanotube Substances 0.000 claims description 4
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 4
- 239000003973 paint Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 claims 1
- 238000009833 condensation Methods 0.000 abstract description 10
- 230000005494 condensation Effects 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 6
- 230000008020 evaporation Effects 0.000 abstract description 5
- 238000001704 evaporation Methods 0.000 abstract description 5
- 238000002474 experimental method Methods 0.000 description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/048—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance for determining moisture content of the material
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01N33/24—Earth materials
- G01N33/246—Earth materials for water content
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
- G01N5/045—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder for determining moisture content
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
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- Health & Medical Sciences (AREA)
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- Analytical Chemistry (AREA)
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- General Health & Medical Sciences (AREA)
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
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Abstract
The invention relates to the field of soil moisture measurement, and discloses a near-surface water flux measurement system and a near-surface water flux measurement method. The measurement system includes: the device comprises an inner barrel, a weight detection device, a humidity monitoring device and a data acquisition device, wherein the bottom of the inner barrel is provided with a bottom plate, and the weight detection device is arranged in an empty bin at the top of the inner barrel and is used for detecting the weight of soil inside the inner barrel in real time. Humidity monitoring devices are a plurality of, and set up along the axial equidistance of inner tube. The invention can detect the evaporation of soil and the quality of condensed water by using the weight detection device, calculate the experimental time and the cross-sectional area of the inner cylinder to obtain the near-surface water flux, and can detect the depth of the water vapor condensation of the soil by using the humidity monitoring device, thereby accurately reflecting and reproducing the occurrence process of the water vapor condensation in the soil. The near-surface water flux measuring system has reasonable structure, light weight, automatic recording and accurate observation.
Description
Technical Field
The invention relates to the field of soil moisture measurement, in particular to a near-surface water flux measurement system and a near-surface water flux measurement method.
Background
The water flux refers to the volume or mass of water per unit of pressure, per unit of time through a unit of membrane area. The near-surface water flux in the arid region is generally generated by the actions of micro-precipitation, evaporation, condensation and the like, and can be directly used for researching the vertical circulation of water in a natural state by measuring the micro-water flux, and the generation time and the generation amount of the soil condensation water can be directly estimated by combining temperature change and calculation. At present, the method for measuring the soil water flux on the near surface is divided into two methods, one is an indirect estimation method, and the method comprises a vorticity covariance system, a large-caliber scintillator and the like, and the instruments can reflect the sensible heat flux of a certain area through the measurement of microaerographic parameters, the measurement of the atmospheric refractive index structural constant and the like, so that the water flux and the like are estimated. Its advantages are overall measurement on regional scale and acquisition of multiple hydrometeorological parameters, but high cost of required equipment, and unacceptable to general research units. The other is a direct measurement method, and typically represents a high-precision lysmeter system, and changes of soil water flux are reflected through changes of the mass of the soil column. However, the system is generally heavy and expensive, and the bottom weighing mode is difficult to reflect the change of near-surface micro water flux, and cannot reflect the occurrence time and the occurrence depth range of the condensed water.
Disclosure of Invention
First, the technical problem to be solved
The embodiment of the invention aims to provide a near-surface water flux measuring system and a near-surface water flux measuring method, which are used for solving the technical problems of high price and low measuring precision of a measuring device in the prior art.
(II) technical scheme
In order to solve the above technical problems, an embodiment of the present invention provides a near-surface water flux measurement system, including: the device comprises an inner cylinder, a weight detection device and a humidity monitoring device, wherein a bottom plate is arranged at the bottom of the inner cylinder, the weight detection device is arranged in a hollow bin at the top of the inner cylinder and used for detecting the change of soil quality inside the inner cylinder, and the humidity monitoring device is multiple and is arranged along the axial direction of the inner cylinder at intervals.
The measuring system further comprises an outer cylinder and a base, wherein the outer cylinder is sleeved on the outer periphery side of the inner cylinder, and the base is fixed at the bottom of the outer cylinder.
The measuring system further comprises a transverse ring and a plurality of first upright posts, wherein the first upright posts are vertically supported at the top and the bottom of the outer cylinder, and the transverse ring is arranged around the peripheral side of the outer cylinder and is vertical to the first upright posts so as to be connected with the first upright posts.
The measuring system further comprises a second upright post and a hollow upright post, the second upright post is axially overlapped with the outer cylinder, the hollow upright post is axially overlapped with the inner cylinder, the hollow upright post is sleeved on the outer periphery side of the second upright post, and the humidity monitoring device is arranged on the outer wall of the hollow upright post.
The measuring system further comprises a fence, wherein the diameter of the fence is 5-10 times of that of the inner cylinder, and the fence is arranged on the outer side of the inner cylinder in a surrounding mode.
The measuring system further comprises a top cover, the top cover is arranged at the top of the inner cylinder, the top cover is of a hollow structure, and a top cover edge protruding vertically upwards is formed at the edge of the top cover.
Wherein, humidity monitoring device follows the axial equidistance setting of inner tube.
Wherein, the inner cylinder and the outer cylinder are carbon fiber net cylinders, and carbon nanotube paint is sprayed on the surfaces.
The measuring system further comprises an observation window, a wire and a data collector, wherein the observation window is located between the weight detection device and the humidity monitoring device, the weight detection device and the humidity monitoring device are connected with the data collector through the wire respectively, and the wire penetrates through the observation window.
The embodiment of the invention also discloses a measuring method by using the measuring system for the near-surface water flux, which comprises the following steps:
Measuring the diameter of the inner cylinder and calculating the cross-sectional area of the inner cylinder;
Filling the inner cylinder with undisturbed soil, and lifting the inner cylinder by using the weight detection device to obtain the total mass of the inner cylinder, the bottom plate and the undisturbed soil;
Standing for a set time, lifting the inner cylinder again by using the weight detection device to obtain the total mass of the inner cylinder, the bottom plate and the undisturbed soil at the moment, and calculating to obtain the mass of the evaporated or condensed water of the soil within the set time;
And calculating the water flux through the cross section area of the inner barrel, the set time and the quality of the evaporated or condensed water of the soil, and monitoring humidity values at different depth positions in the soil through the temperature detection device.
(III) beneficial effects
According to the measuring system and the measuring method for the near-surface water flux, provided by the embodiment of the invention, the weight detection device can be used for detecting the evaporation of soil and the quality of condensed water, the near-surface water flux is obtained by observing time and calculating the cross section area of the inner cylinder, and the humidity monitoring device can be used for detecting the depth of the water vapor condensation of the soil, so that the occurrence process of the water vapor condensation in the soil can be accurately reflected and reappeared. The near-surface water flux measuring system has reasonable structure, light weight, automatic recording and accurate observation.
Drawings
Fig. 1 is a schematic structural diagram of a near-surface water flux measurement system according to an embodiment of the present invention.
Reference numerals:
1: an inner cylinder; 1-1: a hollow upright; 1-2: an observation window; 1-3: a weight detecting device; 1-4: a humidity monitoring device; 2: an outer cylinder; 2-1: a base; 2-2: a first upright; 2-3: a second upright; 2-4: a transverse ring; 3: a data collector; 3-1: a wire; 4: a top cover; 4-1: a top cover edge; 5: and (5) a fence.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1, an embodiment of the present invention discloses a near surface water flux measurement system, comprising: the device comprises an inner cylinder 1, a weight detection device 1-3 and a humidity monitoring device 1-4, wherein a bottom plate is arranged at the bottom of the inner cylinder 1, the weight detection device 1-3 is arranged in a hollow bin at the top of the inner cylinder 1 and used for detecting the change of soil quality in the inner cylinder 1, and the humidity monitoring devices 1-4 are multiple and are arranged at intervals along the axial direction of the inner cylinder 1.
Specifically, the inner cylinder 1 in the application is a hollow cylinder body, the inner diameter of the inner cylinder 1 is about 20 cm, and the inner diameter of the inner cylinder 1 can be changed according to actual needs. The weight detection device 1-3 can adopt a weight sensor, and slightly lifts the base 2-1 and the inner barrel 1 in the measuring process, so that the problems of large occupied area and complex structure are avoided by replacing a plurality of detection devices in the prior art and arranging the detection devices at the bottom. The humidity monitoring devices 1 to 4 may employ a resistive humidity sensor having a ring shape, which is reflected by a resistance value when a humidity change occurs at a certain depth position of the soil, specifically, when the humidity of the soil increases, the resistance value increases. The humidity monitoring devices 1-4 may be arranged one every 5-10 cm in height.
The weight detecting device 1-3 can be a steelyard, a spring balance or an electronic balance, and the humidity detecting device can be a soil humidity detector, a soil hygrometer or a soil moisture quick-measuring device.
According to the definition of water flux: the mass of water per unit of pressure per unit of time through the unit of membrane area. The measuring system of the present invention can complete the measurement of water flux, measure the weight change of soil by using the weight detecting device 1-3, and the weight change can reflect the quality of evaporated or condensed water, record the experimental time by the data collector 3 or other timing device, measure the inner diameter of the inner cylinder 1 by the ruler, and calculate the cross-sectional area of the inner cylinder 1. Since the soil is typically measured in a normal atmospheric pressure, the pressure value is typically a known condition, and if the soil is in a non-normal atmospheric pressure environment, a barometer is required to measure the local air pressure. By the above data, the mass of the evaporated or condensed water is divided by the cross-sectional area of the inner tube 1, the experimental time and the atmospheric pressure value in order, the water flux can be obtained. By means of the humidity monitoring devices 1-4 arranged at different depths, humidity transitions at different depths can be detected to reproduce the water condensation process in the soil.
According to the measuring system for the near-surface water flux, provided by the embodiment of the invention, the weight detection device can be used for detecting the evaporation of soil and the quality of condensed water, the near-surface water flux is obtained by observing time and calculating the cross section area of the inner cylinder 1, and the humidity monitoring device can be used for detecting the depth of the water vapor condensation of the soil, so that the occurrence process of the water vapor condensation in the soil can be accurately reflected and reappeared. The near-surface water flux measuring system has reasonable structure, light weight, automatic recording and accurate observation.
The measuring system of the embodiment further comprises an outer cylinder 2 and a base 2-1, wherein the outer cylinder 2 is sleeved on the outer periphery side of the inner cylinder 1, the base 2-1 is fixed to the bottom of the outer cylinder 2, and the base 2-1 is annular in shape and plays a role in fixing the outer cylinder. Preferably, the measuring system of the present embodiment further includes a transverse ring 2-4 and a plurality of first upright posts 2-2, the first upright posts 2-2 are vertically supported at the top and bottom of the outer cylinder 2, and the transverse ring 2-4 is disposed around the circumferential side of the outer cylinder 2 and is perpendicular to the first upright posts 2-2 to connect the first upright posts 2-2. Further, the inner cylinder 1 and the outer cylinder 2 are carbon fiber net cylinders, carbon nanotube paint is sprayed on the surfaces of the inner cylinder 1 and the outer cylinder 2, the carbon fiber net has certain mechanical strength, and the transverse rings 2-4 and the plurality of first upright posts 2-2 are arranged on the carbon fiber net cylinders to further strengthen the mechanical strength of the outer cylinder 2 and strengthen the structural stability of a measuring system. And the carbon fiber net can simulate the mixed structure of the soil surface layer and the dead branch fallen leaf layer to the greatest extent, and the carbon nanotube coating can ensure the entry and exit of fine sand soil substances inside and outside the cylinder, and can ensure the measurement accuracy by enabling water vapor to enter the soil of the inner cylinder 1 through the coating and the fiber layer.
If the diameter of the inner cylinder 1 is 20 cm, the diameter of the outer cylinder 2 is 21-22 cm in consideration of the wall thickness of the inner cylinder 1, and the heights of the inner cylinder 1 and the outer cylinder 2 can be 20-50 cm according to measurement requirements.
The measuring system further comprises a second upright post 2-3 and a hollow upright post 1-1, the second upright post 2-3 is axially overlapped with the outer barrel 2, the hollow upright post 1-1 is axially overlapped with the inner barrel 1, the hollow upright post 1-1 is sleeved on the outer peripheral side of the second upright post 2-3, and the humidity monitoring device 1-4 is arranged on the outer wall of the hollow upright post 1-1. The height of the second upright post 2-3 is 25-55 cm, and the height of the hollow upright post 1-1 is 27-57 cm. In the embodiment, the second upright post 2-3 and the hollow upright post 1-1 ensure that the axes of the inner barrel 1 and the outer barrel 2 are consistent, the humidity monitoring device 1-4 is also ensured to be positioned at the central position of the measured soil, and the measurement accuracy is improved.
The measuring system further comprises a fence 5, wherein the diameter of the fence 5 is 5-10 times of that of the inner cylinder 1, and the fence is arranged on the outer side of the inner cylinder 1 in a surrounding mode. The fence 5 in the embodiment has the function of blocking surrounding surface sand and foreign matters from entering the weighing area of the inner cylinder 1, does not influence the change of a wind field, has the diameter of 5-10 times of the diameter of the inner cylinder 1 and has the height of 20-40 cm.
The measuring system further comprises a top cover 4, the top cover 4 is arranged at the top of the inner barrel 1, the top cover 4 is of a hollow structure, a top cover edge 4-1 protruding vertically upwards is constructed at the edge of the top cover 4, the height of the outer wall is 0.3-0.5 cm, and the influence of wind power and external sand dust on measuring accuracy is avoided.
The humidity monitoring devices 1-4 are equidistantly arranged along the axial direction of the inner cylinder 1, four humidity monitoring devices 1-4 can be arranged according to experimental requirements, and the height distance between every two adjacent humidity monitoring devices 1-4 is 4-10 cm.
The measuring system of the embodiment further comprises an observation window 1-2, a lead wire 3-1 and a data collector 3, wherein the observation window 1-2 is positioned on the hollow upright column 1-1 between the weight detection device 1-3 and the humidity monitoring device 1-4, the weight detection device 1-3 and the humidity monitoring device 1-4 are respectively connected with the data collector 3 through the lead wire 3-1, and the lead wire 3-1 penetrates through the observation window 1-2. In this embodiment, the data collector 3 or other data processing devices are adopted to collect and process the weight data and the humidity data, the data collector 3 in this embodiment also has a timing function, can record the experiment time, and an operator can read and display the readings of the weight detection device 1-3 and the humidity monitoring device 1-4 and the experiment time through the data collector 3. In the embodiment, the operation lead can be led out through the observation window 1-2, and whether the circuits of the weight detection device 1-3 and the humidity monitoring device 1-4 are normal or not can be observed, so that the detection and the maintenance are convenient.
The embodiment of the invention also discloses a measurement method of the near-surface water flux measurement system by utilizing the embodiment, which comprises the following steps:
Measuring the diameter of the inner cylinder 1 and calculating the cross-sectional area S thereof;
The inner cylinder 1 is filled with undisturbed soil, and the inner cylinder 1 is lifted by utilizing the weight detection device 1-3 to obtain the total mass m 1 of the inner cylinder 1, the bottom plate and the undisturbed soil;
Standing for a set time t 1, lifting the inner cylinder 1 again by using the weight detection device 1-3 to obtain the total mass m 2 of the inner cylinder 1, the bottom plate and undisturbed soil at the moment, and obtaining the mass m of evaporation or condensation water of the soil in the time t 1 by using the difference between m 2 and m 1;
The water flux is calculated by the cross-sectional area S of the inner drum 1, the set time t 1 and the mass m of the evaporated or condensed water of the soil, and the humidity values at different depth positions in the soil are monitored by the temperature detecting means 1-4.
From the known local atmospheric pressure P and the measured data, it is possible to obtain:
Before the experiment starts, holes are dug on the ground vertically by the diameter and the height of the outer cylinder 2 at preset positions, the outer cylinder 2 is placed in the holes, so that the holes are kept horizontally consistent with the outer cylinder 2, and then the outer cylinder 2, the base 2-1, the inner cylinder 1 and the like are placed, and the base 2-1 is ensured to be horizontal.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (7)
1. A near surface water flux measurement system, comprising: the device comprises an inner cylinder, a weight detection device and a humidity monitoring device, wherein the bottom of the inner cylinder is provided with a bottom plate, the weight detection device is arranged in a blank room at the top of the inner cylinder and is used for detecting the change of soil quality in the inner cylinder, and the humidity monitoring devices are multiple and are arranged at intervals along the axial direction of the inner cylinder;
The measuring system further comprises an outer cylinder and a base, wherein the outer cylinder is sleeved on the outer periphery side of the inner cylinder, and the base is fixed at the bottom of the outer cylinder;
The measuring system further comprises a transverse ring and a plurality of first upright posts, wherein the first upright posts are vertically supported at the top and the bottom of the outer cylinder, and the transverse ring is arranged around the periphery of the outer cylinder and is vertical to the first upright posts so as to connect the first upright posts;
the measuring system further comprises a second upright post and a hollow upright post, the second upright post is axially overlapped with the outer cylinder, the hollow upright post is axially overlapped with the inner cylinder, the hollow upright post is sleeved on the outer periphery side of the second upright post, and the humidity monitoring device is arranged on the outer wall of the hollow upright post.
2. The near-surface water flux measurement system of claim 1, further comprising a fence having a diameter 5-10 times the diameter of the inner barrel and surrounding the outer side of the inner barrel.
3. The near-surface water flux measurement system of claim 1, further comprising a top cover disposed on top of the inner barrel, the top cover being of hollow construction and having a vertically upwardly projecting top cover rim configured at an edge of the top cover.
4. The near-surface water flux measurement system of claim 1, wherein the wetness monitoring devices are equally spaced along the axial direction of the inner barrel.
5. The near-surface water flux measurement system of claim 1, wherein the inner and outer cylinders are carbon fiber mesh cylinders and carbon nanotube paint is sprayed on the surfaces.
6. The near-surface water flux measurement system of claim 1, further comprising a viewing window, a wire, and a data collector, the viewing window being located on the hollow upright between the weight detection device and the humidity monitoring device, the weight detection device and the humidity monitoring device being connected to the data collector by the wire, respectively, and the wire passing through the viewing window.
7. A measurement method using the near surface water flux measurement system according to any one of claims 1 to 6, comprising:
Measuring the diameter of the inner cylinder and calculating the cross-sectional area of the inner cylinder;
Filling the inner cylinder with undisturbed soil, and lifting the inner cylinder by using the weight detection device to obtain the total mass of the inner cylinder, the bottom plate and the undisturbed soil;
Standing for a set time, lifting the inner cylinder again by using the weight detection device to obtain the total mass of the inner cylinder, the bottom plate and the undisturbed soil at the moment, and calculating to obtain the mass of the evaporated or condensed water of the soil within the set time;
And calculating the water flux through the cross section area of the inner barrel, the set time and the quality of the evaporated or condensed water of the soil, and monitoring humidity values at different depth positions in the soil through a temperature detection device.
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| CN201911361309.2A CN110940607B (en) | 2019-12-25 | 2019-12-25 | Near-surface water flux measuring system and measuring method |
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| CN113109378B (en) * | 2021-04-06 | 2022-09-27 | 山东省鲁南地质工程勘察院(山东省地勘局第二地质大队) | Steep rock surface water vapor condensation monitoring method |
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| CN102478476A (en) * | 2010-11-25 | 2012-05-30 | 中国林业科学研究院林业研究所 | Device and method for acquiring soil evaporation information |
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| CN104596882A (en) * | 2014-12-29 | 2015-05-06 | 北京林业大学 | Device for determining atmospheric condensed water |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6957573B2 (en) * | 2002-01-29 | 2005-10-25 | The Regents Of The University Of California | Vadose zone water fluxmeter |
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| CN102478476A (en) * | 2010-11-25 | 2012-05-30 | 中国林业科学研究院林业研究所 | Device and method for acquiring soil evaporation information |
| CN103091197A (en) * | 2013-01-15 | 2013-05-08 | 甘肃省气象局 | Weighing steam infiltration meter |
| CN104266926A (en) * | 2014-09-19 | 2015-01-07 | 西北农林科技大学 | Vaporous soil water acquisition measurement system |
| CN104596882A (en) * | 2014-12-29 | 2015-05-06 | 北京林业大学 | Device for determining atmospheric condensed water |
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| Title |
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