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An in-situ soil column irrigation leaching test and quantitative description method of solute migration

An in-situ soil column and quantitative description technology, applied in the field of soil testing and testing, can solve problems such as the inability to implement irrigation leaching tests and quantitative research, and achieve the effects of reducing lateral flow of solutes, avoiding long-term contact, and improving accuracy.

Active Publication Date: 2021-09-07
INST OF HYDROGEOLOGY & ENVIRONMENTAL GEOLOGY CHINESE ACAD OF GEOLOGICAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an in-situ soil column irrigation leaching test and a quantitative description method for solute migration, so as to solve the problem that the existing test device cannot realize the irrigation leaching test and quantitative research under in-situ conditions

Method used

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  • An in-situ soil column irrigation leaching test and quantitative description method of solute migration
  • An in-situ soil column irrigation leaching test and quantitative description method of solute migration
  • An in-situ soil column irrigation leaching test and quantitative description method of solute migration

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Experimental program
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Effect test

Embodiment 1

[0039] Example 1: In-situ soil column irrigation leaching test device.

[0040] Such as figure 1 As shown, the present invention mainly includes parts such as a limit frame, a water supply device, a receiving tray, a liquid reservoir, an exhaust pipe, a sampling device, an inflation device and a controller.

[0041]Limiting frame comprises outer frame 19 and inner frame 20 that coaxially arranges, and inner frame 20 and outer frame 19 are circular frames of equal height (the high about 50cm of two frames, diameter is respectively 25cm and 50cm), and both They are all made of stainless steel and are used to restrict the lateral seepage of the leaching solution to achieve one-dimensional vertical leaching close to the soil column.

[0042] Such as Figure 4 As shown, the water supply device includes an inner frame water supply Martens bottle 21-1 for supplying water to the inner frame and an outer frame water supply Martens bottle 21-2 for supplying water to the outer frame. ...

Embodiment 2

[0049] Example 2: In situ soil column irrigation leaching test and quantitative description method of solute migration.

[0050] In-situ soil column leaching test and quantitative sampling method of the present invention comprise the steps:

[0051] 1) Select the test site in the research area, shovel off 3-5cm of surface soil, press the bottom of the limit frame (about 5cm) vertically into the soil layer, keep the inner frame 20 and outer frame 19 coaxial, use a level to detect the Whether the frame 20 and the outer frame 19 are horizontal and concentric, compact and reinforce the outside of the outer frame 19; lay a layer of gravel on the soil inside the limit frame, and stick a scale mark on the side wall of the limit frame. The purpose of laying gravel is to prevent the mud layer in the frame from being washed up when water is injected at a fixed head, and the immediate scale is to facilitate the control and setting of the water head.

[0052] 2) Excavate the earth at a d...

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Abstract

The invention relates to an in-situ soil column irrigation leaching test and a quantitative description method for solute migration. The device used in the method includes a limit frame, a receiving plate arranged below the limit frame, a liquid reservoir connected to the bottom of the receiving plate, A sampling device communicated with the bottom of the liquid reservoir, an inflating device used to inflate the liquid reservoir, an exhaust pipe used to discharge the gas in the liquid reservoir, a water supply device used to supply water to the limit frame, and Controller to control the filling device and sampling device. The invention can conveniently and systematically realize the complete test process of constant water head, one-dimensional vertical leaching, and sample time calibration and collection under field irrigation conditions, and carry out mathematical quantitative description and prediction on the law of leaching solute migration, and realize In situ irrigation leaching experiments and quantitative studies were carried out, which provided guidance for further revealing the mechanism of soil solute migration and using mathematical models to simulate the process of soil solute migration.

Description

technical field [0001] The invention relates to a soil detection test method, in particular to an in-situ soil column irrigation leaching test and a quantitative description method for solute migration. Background technique [0002] The composition of nutrients such as carbon, nitrogen, and phosphorus in soil closely affects the migration and change behavior of soil ecological quality and environmental factors in contact with it. Currently, the research methods of soil leaching substances (such as dissolved organic carbon (DOC)) are mainly the filling disturbed soil column method and the undisturbed soil column method. The method of filling disturbed soil column is to refill the soil column according to the measured soil parameters after a series of treatments of the collected field soil. The undisturbed soil column method is to use some equipment to collect the undisturbed soil column and bring it back to the laboratory to put it into the column for indoor undisturbed soil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/24
Inventor 刘昌蓉霍志彬黄爽兵顾文龙
Owner INST OF HYDROGEOLOGY & ENVIRONMENTAL GEOLOGY CHINESE ACAD OF GEOLOGICAL SCI
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