CN105158110A - Small size lysimeter suitable for different groundwater depths - Google Patents

Small size lysimeter suitable for different groundwater depths Download PDF

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Publication number
CN105158110A
CN105158110A CN201510561949.3A CN201510561949A CN105158110A CN 105158110 A CN105158110 A CN 105158110A CN 201510561949 A CN201510561949 A CN 201510561949A CN 105158110 A CN105158110 A CN 105158110A
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China
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water
core
measurement
groundwater
load cells
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CN201510561949.3A
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Chinese (zh)
Inventor
鞠琴
郝振纯
余钟波
堵同柱
付晓雷
谷黄河
徐海卿
孙爱立
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Hohai University HHU
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Hohai University HHU
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Priority to CN201510561949.3A priority Critical patent/CN105158110A/en
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Abstract

The invention discloses a small size lysimeter suitable for different groundwater depths. The small size lysimeter comprises a measuring inner barrel, a measuring outer barrel, a weighing sensor, a data acquisition unit, a sensor support device, a lithium battery, a water supplying meter, a water supplying pipe, a fixed bolt, a positioning bolt, a handle of a barrelhead, a sealed barrelhead, and a water level control barrel of groundwater. The small size lysimeter has the advantages that the weighing sensor replaces a traditional electronic balance scale, the continuous working of an apparatus is possible, the soil evaporation and the plant evaporation in any period can be automatically monitored, and the measurement accuracy is high; a tipping-bucket rain gauge purchased by a businesslike approach is taken as the water supplying meter, the cost is low, the water supplying meter and a water level control barrel of the groundwater are integrated as a whole, the evapotranspiration research on different groundwater depths is realized, the convenience is provided for the field operation and the construction cost is greatly lowered; the structure is simple, the measurement accuracy is effectively improved due to the fact that a fixed apparatus is used for continuously monitoring data, and the outside interference is avoided, meanwhile the usage and the maintenance are convenient, and can be completed by an ordinary worker.

Description

A kind of small precast unit being applicable to different bury of groundwater
Technical field
The present invention relates to a kind of small-sized automatic weighing lysimeter measuring soil evaporation and plant transpiration water consumption, be especially applicable to the long-term automatic Observation under different underground water Conditions of Buried Depth, belong to hydrometeorological test field.
Background technology
To evapotranspire soil evaporation and the transpiration sum of bristling with anger, which control soil to the steam of propagation in atmosphere and affect vegetation growth, soil moisture content, under ooze and runoff process etc., in water globe circulation and climatic revolution, have important effect, be the key link of water circulation.The water resources management of the accurate measurements watershed of evapotranspiration, river basin planning and the Study on Sustainable Development are most important.
At present, the evapotranspiration of soil and plant is generally measured by methods such as lysimeter, ripple ratio method and Chamber technique.Ripple ratio method and Chamber technique are mainly based on domestic and international imported product, expensive, drop into huge, are difficult to popularize.Lysimeter is mainly divided into Large-scale lysimeter and miniature evaporator two kinds.Large-scale lysimeter due to installation and maintenance difficulty comparatively large, and immovability, have certain limitation, and miniature evaporator is installed relative with principle simple, and reliability is high, is widely used in therefore testing in the wild.But in the soil column evapotranspiration experiment under the different underground water Conditions of Buried Depth of monitoring, miniature evaporator mostly adopts artificial water application and weighs, electronic scale timing is utilized to weigh the mass change of soil column, field operation is very inconvenient, cause observation person works to measure greatly, and can not get evapotranspiration observation data continuous in time.Therefore, a kind of simple and practical, cheap, easy to operate lysimeter must be facilitated to study.Under the different underground water Conditions of Buried Depths that the present invention relates to small-sized automatic weighing lysimeter and measuring method significant for the water circulation research under climate change and the effect of human activity.
Summary of the invention
What the present invention proposed is a kind of small precast unit being applicable to different bury of groundwater, improves measuring accuracy and reduces human input, be intended to the defect overcoming existing Weighing Lysimeter technology from minimizing instrument experiment error.Make lysimeter continuous working with the support of lithium electrical storage cell condition, namely the mass change can measuring the soil column under different bury of groundwater obtains the evapotranspiration of soil and plant.
Technical solution of the present invention, be applicable to a small precast unit for different bury of groundwater, its structure comprises measuring inner core 1, measurement urceolus 2, LOAD CELLS 3, data acquisition unit 4, sensor support device 5, lithium electrical storage cell 6, water measurement device 7, feed pipe 8, set bolt 10, positioning bolt 11, bung handle 12, the bung 13 adding sealing, groundwater level application cylinder 14, wherein measure inner core 1 in measurement urceolus 2, the bottom outside measuring inner core 1 is LOAD CELLS 3, LOAD CELLS 3 connects the bottom measuring urceolus 2 by sensor support device 5, the left side of sensor support device 5 is data acquisition units 4, the right side of sensor support device 5 is lithium electrical storage cells 6, one end of feed pipe 8 is by the affixed measurement inner core 1 of set bolt 10, measure urceolus 2, the lower left side of the affixed groundwater level application cylinder 14 of the other end of feed pipe 8, connect by positioning bolt 11 bung 13 adding sealing between the both sides of groundwater level application cylinder 14, the bung 13 adding sealing establishes bung handle 12.
Advantage of the present invention is: replace traditional electronic balance scale by LOAD CELLS, makes instrument continuous working always become possibility, and automatically can monitor soil evaporation and the plant evapotranspiration of arbitrary period, measuring accuracy is high; Adopt the tipping-bucket rain-gauge of commercial sources purchase as water measurement device, with low cost, union groundwater level application cylinder and one, realize the evapotranspiration research of different bury of groundwater, provide convenience and significantly reduce cost for field work; Structure is simple, cheap, owing to using the continuous Monitoring Data of retainer instrument, avoids external interference, effectively improves measuring accuracy, simultaneously convenient maintenance, and common staff can complete.The features such as concrete structure is simple, cheap, convenient maintenance.
Accompanying drawing illustrates:
Fig. 1 is a kind of structural representation being applicable to the small precast unit of different bury of groundwater.
Fig. 2 is the relation schematic diagram measured inner core, measure urceolus, groundwater level application cylinder and feed pipe.
Fig. 3 is the schematic diagram of data acquisition unit.
In Fig. 1 and Fig. 2: 1 is measure inner core, 2 is measure urceolus, and 3 is LOAD CELLS, 4 is data acquisition units, and 5 is sensor support devices, and 6 is lithium electrical storage cells, 7 is water measurement devices, 8 is feed pipes, and 9 is groundwater levels, and 10 is set bolts, 11 is positioning bolts, 12 is bung handles, and 13 is the bungs adding sealing, and 14 is groundwater level application cylinders
In Fig. 3, data acquisition unit by modulus (A/D) converter (as: 7135), one chip microcomputer (as: 8031), parallel interface I/O(as: 8155), the part such as program storage (as: 2764), light-emitting diode display, register instrument (as: mini-printer) and keyboard forms.
Embodiment:
As shown in Figure 1, be applicable to a small precast unit for different bury of groundwater, its structure comprises measures inner core 1, measurement urceolus 2, LOAD CELLS 3, data acquisition unit 4, sensor support device 5, lithium electrical storage cell 6, water measurement device 7, feed pipe 8, set bolt 10, positioning bolt 11, bung handle 12, the bung 13 adding sealing, groundwater level application cylinder 14, wherein measure inner core 1 in measurement urceolus 2, measuring inner core 1 bottom outside is LOAD CELLS 3, LOAD CELLS 3 connects the bottom measuring urceolus 2 by sensor support device 5, the left side of sensor support device 5 is data acquisition units 4, the right side of sensor support device 5 is lithium electrical storage cells 6, one end of feed pipe 8 is by the affixed measurement inner core 1 of set bolt 10, measure urceolus 2, the lower left side of the affixed groundwater level application cylinder 14 of the other end of feed pipe 8, connect by positioning bolt 11 bung 13 adding sealing between the both sides of groundwater level application cylinder 14, the bung 13 adding sealing establishes bung handle 12.
Described measurement inner core 1 is placed in the center in LOAD CELLS 3, LOAD CELLS 3 is supported by sensor support device 5, data acquisition unit 4, sensor support device 5 and lithium electrical storage cell 6 are all fixed on the bottom measuring urceolus 2, and the signal output part of LOAD CELLS 3 connects with the signal input part of data acquisition unit 4.
Described water measurement device 7 is supplied water to groundwater level application cylinder 14 by water-head, is communicated with, makes the groundwater level 9 of measurement inner core 1 consistent with groundwater level application cylinder 14 water level with measurement inner core 1.
LOAD CELLS 3 and data acquisition unit 4 provide power supply by lithium electrical storage cell 6, the mass change of LOAD CELLS 3 by cable transmission to data acquisition unit 4;
Sensor support device 5 adopts reinforced concrete structure, and LOAD CELLS 3 is placed on sensor support device 5, with north arrow, level be as the criterion adjustment weight sensor 3 on the central horizontal position of sensor support device 5.
Feed pipe length between described measurement inner core and groundwater level application cylinder should be determined according to position size between the two.
Described measurement inner core, measurement urceolus and groundwater level application cylinder and bung thereof are pvc pipe.
Described sensor support device adopts Reinforced Concrete Materials process.
The described bung adding sealing also comprises bung handle, and handle is positioned at the center of bung, facilitates bung to move in the vertical direction of groundwater level application cylinder.
Described water measurement device can directly by the tipping-bucket rain-gauge that commercial sources is bought, by supplying
Water pipe water filling is to tipping-bucket rain-gauge, this rain gage can monitor the water yield automatically, principle of work is that metering tipping bucket is injected at the waterfront economy mouth of a river, when injecting water capacity and reaching setting metering, tipping bucket can overturn, and in switching process, magnet steel is through tongue tube, make dry-reed tube switch once, will send a pulse signal, can realize automatically gathering the metering of supplying water through instrument record, detailed principle is shown in that patent " can observe the tipping-bucket rain-gauge of accumulative quantity of precipitation ".
Measuring method, comprises,
1) be embedded in the soil of monitored area by measurement urceolus 2, and make the top of measurement urceolus 2 exceed monitored area about plane 5mm, entering with rainwater-proof affects observed result;
2) measure inner core 1 and fill soil column (if on soil column long-term cropping, namely this experiment studies the evapotranspiration of soil and plant), be placed in LOAD CELLS 3, LOAD CELLS 3 top movable bearing is fixed on and measures bottom inner core 1; The radial gap measured between inner core 1 and measurement urceolus 2 is less than 5mm, measures inner core 1, measures the center of urceolus 2, LOAD CELLS 3 and sensor support device 5 on same vertical line;
3) groundwater level application cylinder 14 is placed near the outside measuring urceolus, bottom both, remains on sustained height.See Fig. 2, an aperture is respectively opened in the same level measuring inner core 1, measurement urceolus 2 and groundwater level application cylinder 14, the height of perforate is near the bottom measuring inner core 1 sidewall, feed pipe is passing three holes, fixed by set bolt 10, and the center line of feed pipe 8 and the circle center line connecting of three are repeated;
4) external port of feed pipe 8 one end and the outer wall measuring inner core 1 are come into line, and at port parcel screen pack, prevent the soil measuring inner core 1 from entering feed pipe 8; The external port of feed pipe 8 other end and the outer wall of groundwater level application cylinder 14 come into line;
5) by cable, the mass change of LOAD CELLS 3 is transferred to data acquisition unit 4, adopts timer to data acquisition unit 4 timing, as sampling interval duration can be set to 1 hour; Data acquisition unit 4 storing data automatically also transmits;
6) water delivering orifice of water measurement device 7 is higher than the constant water level water inlet of underground water water lev el control cylinder 14, when feed pipe 8 water filling is to water measurement device 7, water measurement device 7 measures, supplied water to groundwater level application cylinder 14 by water-head, until water filled by groundwater level application cylinder 14, because feed pipe 8 is communicated with measurement inner core 1, the groundwater level measuring inner core 1 is consistent with the fixing water level of groundwater level application cylinder 14;
7) according to LOAD CELLS 3 not quality record value in the same time, and and same preset time section water measurement device 7 output between difference, be the total amount of the soil and plant evapotranspiration of this time period, thus reach the evapotranspiration of monitoring different bury of groundwater.

Claims (7)

1. one kind is applicable to the small precast unit of different bury of groundwater, it is characterized in that comprising and measure inner core, measurement urceolus, LOAD CELLS, data acquisition unit, sensor support device, lithium electrical storage cell, water measurement device, feed pipe, set bolt, positioning bolt, bung handle, the bung adding sealing, groundwater level application cylinder; Wherein measure inner core in measurement urceolus, measuring inner core bottom outside is LOAD CELLS, LOAD CELLS connects the bottom measuring urceolus by sensor support device, the left side of sensor support device is data acquisition unit, the right side of sensor support device is lithium electrical storage cell, one end of feed pipe is by the affixed measurement inner core of set bolt, measurement urceolus, the lower left side of the affixed groundwater level application cylinder of the other end of feed pipe, connect by positioning bolt the bung adding sealing between the both sides of groundwater level application cylinder, the bung adding sealing establishes bung handle.
2. a kind of small precast unit being applicable to different bury of groundwater according to claim 1, it is characterized in that described measurement inner core is placed in the center in LOAD CELLS, LOAD CELLS is supported by sensor support device, data acquisition unit, sensor support device and lithium electrical storage cell are all fixed on the bottom measuring urceolus, and the signal output part of LOAD CELLS connects with the signal input part of data acquisition unit.
3. a kind of small precast unit being applicable to different bury of groundwater according to claim 1, it is characterized in that the constant water level water inlet of the water delivering orifice of described water measurement device higher than underground water water lev el control cylinder, water measurement device is supplied water to groundwater level application cylinder by water-head, groundwater level application cylinder is communicated with measurement inner core, makes the groundwater level of measurement inner core consistent with groundwater level application cylinder water level.
4. a kind of small precast unit being applicable to different bury of groundwater according to claim 1, it is characterized in that described LOAD CELLS and data acquisition unit provide power supply by lithium electrical storage cell, the mass change of LOAD CELLS by cable transmission to data acquisition unit.
5. a kind of small precast unit being applicable to different bury of groundwater according to claim 1, is characterized in that the feed pipe length between described measurement inner core and groundwater level application cylinder should be determined according to position size between the two.
6. a kind of small precast unit being applicable to different bury of groundwater according to claim 1, it is characterized in that the described bung adding sealing comprises bung handle, handle is positioned at the center of bung, facilitates bung to move in the vertical direction of groundwater level application cylinder.
7. a kind of small precast unit then metering method being applicable to different bury of groundwater as claimed in claim 1, it is characterized in that comprising 1) measurement urceolus is embedded in the soil of monitored area, and make the top of measurement urceolus exceed monitored area about plane 5mm, entering with rainwater-proof affects observed result;
2) measure inner core 1 and fill soil column (if on soil column long-term cropping, namely this experiment studies the evapotranspiration of soil and plant), be placed in LOAD CELLS, LOAD CELLS top movable bearing is fixed on and measures bottom inner core; The radial gap measured between inner core and measurement urceolus is less than 5mm, measures inner core, measures the center of urceolus, LOAD CELLS and sensor support device on same vertical line;
3) groundwater level application cylinder is placed near the outside measuring urceolus, both remain on sustained height in bottom, an aperture is respectively opened in the same level measuring inner core, measurement urceolus and groundwater level application cylinder, the height of perforate is near the bottom measuring inner core sidewall, feed pipe is passing three holes, fixed by set bolt, and make the center line of feed pipe and measure inner core, the circle center line connecting of measuring urceolus and groundwater level application cylinder is consistent;
4) external port of feed pipe one end and the outer wall measuring inner core are come into line, and at port parcel screen pack, prevent the soil measuring inner core from entering feed pipe; The external port of the feed pipe other end and the outer wall of groundwater level application cylinder come into line;
5) by cable, the mass change of LOAD CELLS is transferred to data acquisition unit, adopt timer to data acquisition unit timing, sampling interval duration is set to 1 hour, and data acquisition unit storing data automatically also transmits;
6) water delivering orifice of water measurement device is higher than the constant water level water inlet of underground water water lev el control cylinder, when feed pipe water filling is to water measurement device, water measurement device measures, supplied water to groundwater level application cylinder by water-head, until water filled by groundwater level application cylinder, because feed pipe is communicated with measurement inner core, the groundwater level measuring inner core is consistent with the fixing water level of groundwater level application cylinder;
7) according to LOAD CELLS not quality record value in the same time, and and same preset time section water measurement device output between difference, be the total amount of the soil and plant evapotranspiration of this time period, thus reach the evapotranspiration of monitoring different bury of groundwater.
CN201510561949.3A 2015-09-07 2015-09-07 Small size lysimeter suitable for different groundwater depths Pending CN105158110A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105865965A (en) * 2016-05-30 2016-08-17 昆山市水利工程质量安全监督和水利技术推广站 In-field weighting type lysimeter for paddy field
CN106128231A (en) * 2016-07-27 2016-11-16 南京君源环保工程有限公司 A kind of Wetland ecological analog systems
CN106442205A (en) * 2016-09-30 2017-02-22 中国科学院遗传与发育生物学研究所 System and method for automatically determining phreatic evaporation
CN109781958A (en) * 2019-01-03 2019-05-21 中国科学院寒区旱区环境与工程研究所 A kind of undisturbed soil can Bidirectional temperature-controlling measurement plant growth steam and seep device
CN111624328A (en) * 2020-05-05 2020-09-04 中国农业科学院草原研究所 Water supply metering lysimeter and use method thereof
CN114324453A (en) * 2022-03-14 2022-04-12 中国科学院西北生态环境资源研究院 Instrument for measuring sublimation amount of accumulated snow

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Publication number Priority date Publication date Assignee Title
DE19907462C1 (en) * 1999-02-13 2000-06-21 Ufz Leipzighalle Gmbh Automatic operation of weighed groundwater lysimeter, employs closed reference vessel part-filled with water, with control system for pressure in head space
CN102890047A (en) * 2012-09-27 2013-01-23 清华大学 Indoor columnar soil layer infiltration automatic determination system
CN203489942U (en) * 2013-08-06 2014-03-19 中国地质调查局西安地质调查中心 System for observing response of plant transpiration over change of underground water level
CN104111205A (en) * 2013-04-16 2014-10-22 中国科学院寒区旱区环境与工程研究所 Digital multichannel acquisition instrument of plant moisture evaporation and soil leakage
CN104698140A (en) * 2015-03-25 2015-06-10 山西省水利水电科学研究院 Economical adjustable underground water level lysimeter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19907462C1 (en) * 1999-02-13 2000-06-21 Ufz Leipzighalle Gmbh Automatic operation of weighed groundwater lysimeter, employs closed reference vessel part-filled with water, with control system for pressure in head space
CN102890047A (en) * 2012-09-27 2013-01-23 清华大学 Indoor columnar soil layer infiltration automatic determination system
CN104111205A (en) * 2013-04-16 2014-10-22 中国科学院寒区旱区环境与工程研究所 Digital multichannel acquisition instrument of plant moisture evaporation and soil leakage
CN203489942U (en) * 2013-08-06 2014-03-19 中国地质调查局西安地质调查中心 System for observing response of plant transpiration over change of underground water level
CN104698140A (en) * 2015-03-25 2015-06-10 山西省水利水电科学研究院 Economical adjustable underground water level lysimeter

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105865965A (en) * 2016-05-30 2016-08-17 昆山市水利工程质量安全监督和水利技术推广站 In-field weighting type lysimeter for paddy field
CN105865965B (en) * 2016-05-30 2018-11-02 昆山市水利工程质量安全监督和水利技术推广站 Weighing Lysimeter a kind of ground suitable for rice terrace
CN106128231A (en) * 2016-07-27 2016-11-16 南京君源环保工程有限公司 A kind of Wetland ecological analog systems
CN106442205A (en) * 2016-09-30 2017-02-22 中国科学院遗传与发育生物学研究所 System and method for automatically determining phreatic evaporation
CN106442205B (en) * 2016-09-30 2019-05-07 中国科学院遗传与发育生物学研究所 A kind of automatic measuring system of phreatic water evaporation and method
CN109781958A (en) * 2019-01-03 2019-05-21 中国科学院寒区旱区环境与工程研究所 A kind of undisturbed soil can Bidirectional temperature-controlling measurement plant growth steam and seep device
CN111624328A (en) * 2020-05-05 2020-09-04 中国农业科学院草原研究所 Water supply metering lysimeter and use method thereof
CN114324453A (en) * 2022-03-14 2022-04-12 中国科学院西北生态环境资源研究院 Instrument for measuring sublimation amount of accumulated snow

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