Soil water extraction device and extraction method thereof

A technology of soil water and soil, applied in the direction of sampling device, measuring device, sampling, etc., to achieve the effect of avoiding miscalculation, speeding up efficiency and improving accuracy

Inactive Publication Date: 2018-08-14
HOHAI UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention aims at the efficiency and precision problems existing in the existing expe

Method used

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  • Soil water extraction device and extraction method thereof
  • Soil water extraction device and extraction method thereof

Examples

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Embodiment 1

[0052] A method for extracting soil water, comprising the steps of:

[0053] (a) Close the first valve and the second valve, and then turn on the vacuum pump to start vacuuming. When the pressure of the vacuum pump indicates

[0054] When the indicator is less than 1, it means that the equipment from the first valve to the vacuum pump is under vacuum condition, then open the second valve to vacuumize the second container and the third container, and extract the water vapor from the second valve to the vacuum pump device.

[0055] (b) After that, put the soil to be tested in the first container, close the third valve, open the constant temperature electric furnace, adjust the stable temperature of the electric furnace to 105°C, and then turn on the switch of the humidity sensor. As the electric furnace continues to heat up, there will be Water vapor appears, and when the temperature of the electric furnace reaches about 90°C, the second valve is opened. When the reading of the...

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Abstract

The invention relates to a soil water extraction device and an extraction method thereof. An extraction branch is arranged at the device, the extraction branch comprises a first container, a heating device for heating the first container filled with soil, a second container, a third container and a humidity-dependent sensor, the second container is placed in an insulation container filled with a refrigerant, a filtering medium is arranged in the third container, the soil water extraction device also comprises a converter, the converter controls vacuum operation condition of each branch pipeline, when the device operates, all valves of the branch on the converter should be closed, and when the branch pipeline operates, the corresponding branch valve can be opened. According to the invention, several soil water samples are simultaneously extracted, the soil water extraction efficiency is accelerated, and the application of the humidity-dependent sensor can avoid the error estimation of the soil residual water content and increases the isotope measurement precision.

Description

technical field [0001] The invention belongs to the technical field of isotope hydrology, and specifically relates to a soil water extraction device and an extraction method thereof. Background technique [0002] Soil water stable isotopes (deuterium, oxygen-18) are crucial in the study of soil water evaporation, atmospheric precipitation in vadose zone migration and groundwater recharge mechanisms, and these hydrological processes are difficult to quantify by other detection methods. Soil water is an important part of water resources, a source of water absorption for plant growth and development, and an important indicator of pollutants in the soil and changes in the soil environment. In order to fully study soil infiltration and evaporation, many scientific research institutions collect samples of soil water in different regions to explore the change law of its isotopes with time scale and depth, so as to provide sufficient basis for local water resources management. Ther...

Claims

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Application Information

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IPC IPC(8): G01N1/14
CPCG01N1/14G01N2001/1418
Inventor 瞿思敏勾建峰石朋陈学秋李大辰
Owner HOHAI UNIV
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