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Collecting and measuring device for soil evaporation and plant transpiration water vapor and use method of collecting and measuring device

A technology for plant transpiration and water vapor collection, which is applied in the fields of hydrology, farmland water conservancy and ecology, and can solve problems such as high cost, complicated instruments, and difficult operation

Pending Publication Date: 2019-08-09
INST OF HYDROGEOLOGY & ENVIRONMENTAL GEOLOGY CHINESE ACAD OF GEOLOGICAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] For this reason, the embodiment of the present invention provides a soil evaporation and plant transpiration water vapor collection and measurement device and its use method, so as to at least solve the problem of difficult operation and high cost in the prior art due to the complexity of the instrument

Method used

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  • Collecting and measuring device for soil evaporation and plant transpiration water vapor and use method of collecting and measuring device

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Embodiment 1

[0032] Such as figure 1 As shown, the present invention provides a soil evaporation and plant transpiration water vapor collection and measurement device, comprising an evapotranspiration reaction chamber 1 for collecting evaporation and transpiration water vapor; an evapotranspiration water vapor collector 3 for condensation evaporation and transpiration water vapor; The water vapor collector 3 is provided with a collection bottle 32, which is used to contain evaporation and transpiration water vapor; the micro air pump 4, the micro air pump 4 is connected with the collection bottle 32, and is used to extract the air inside the collection bottle 32 and be in a negative pressure state; Pipeline 2, one end of the connecting pipeline 2 protrudes from the evapotranspiration reaction chamber 1, and the other end of the connecting pipeline 2 extends from the collecting bottle 32, which is used to realize the evaporation of the evapotranspiration reaction chamber 1, and the transpira...

Embodiment 2

[0034] In order to control the evapotranspiration of the evapotranspiration reaction chamber 1 to be discharged along the connecting pipeline 2, the present invention provides a soil and plant transpiration water vapor collection and measurement device, the connecting pipeline 2 is provided with a first valve 13, and the first valve 13 is rotated Realize the airtightness of the plexiglass cover 11 or realize communication with the collection bottle 32 .

Embodiment 3

[0036] In order to prevent the influence of the greenhouse effect on the natural evapotranspiration process and the amount of water vapor, the present invention provides a soil evaporation and plant transpiration water vapor collection and measurement device. The bottom of the evapotranspiration reaction chamber 1 is provided with two fans 12, and the fans 12 are provided with sealing baffles. The plate is used to cool down the inside of the plexiglass cover 11 and circulate air before evaporating and evaporating water vapor collection, so as to avoid system errors.

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Abstract

The invention relates to the technical field of evaporation and transpiration water vapor collecting and measuring devices, in particular to a collecting and measuring device for soil evaporation andplant transpiration water vapor. The collecting and measuring device comprises an evapotranspiration reaction chamber, an evapotranspiration water vapor collector, an air extracting pump, and a connecting pipeline, wherein the evapotranspiration reaction chamber is used for collecting the evaporation and transpiration water vapor from soil and plants; the evapotranspiration water vapor collector is used for condensing the evaporation and transpiration water vapor; the evapotranspiration water vapor collector is provided with a collecting bottle which is used for holding the evaporation and transpiration water vapor; the air extracting pump is connected with the collecting bottle, and used for drawing out air inside the collecting bottle and keeping the inside of collecting bottle in the negative pressure state; and one end of the connecting pipeline extends out from the evapotranspiration reaction chamber, the other end of the connecting pipeline extends in from the collecting bottle,and the evaporation and transpiration water vapor from the evapotranspiration reaction chamber enters the collecting bottle through the connecting pipeline, and meanwhile, the collecting and measuringdevice has the characteristics of easy operation and low cost.

Description

technical field [0001] The invention relates to an evaporation and transpiration water vapor collection and measurement device, in particular to an in-situ collection and measurement device for farmland-scale soil evaporation and plant transpiration water vapor and a use method thereof, belonging to the technical fields of hydrology, farmland water conservancy and ecology. Background technique [0002] The study of water balance and evapotranspiration process is an important aspect of hydrological cycle research; correct observation and calculation of actual surface evapotranspiration is of great significance for understanding the characteristics of water cycle under climate change conditions and realizing sustainable development and utilization of regional water resources; In order to measure plant evapotranspiration and soil evaporation conveniently and effectively, and to provide an easy-to-use instrument with high measurement accuracy and good stability for water use rese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00G01N5/04
CPCG01N33/00G01N5/04
Inventor 王茜崔浩浩刘鹏飞王金哲张光辉
Owner INST OF HYDROGEOLOGY & ENVIRONMENTAL GEOLOGY CHINESE ACAD OF GEOLOGICAL SCI
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