Undisturbed soil layered leaching sampling device

A sampling device and undisturbed soil technology, which is applied in the field of soil hydrology test and environmental science, can solve the problems of weak regional representation, indistinguishable distinction, unresolved devices, etc.

Inactive Publication Date: 2020-06-02
安徽省(水利部淮河水利委员会)水利科学研究院(安徽省水利工程质量检测中心站)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are some patents related to soil column leaching sampling devices, but none of these devices solve the aforementioned problems
For example, the patent titled "Soil Pillar Leaching Device" (Application No. 201410403212.4, Publication No. 104215747B), and the patent named "A Soil Pillar Leaching Device for Simulation of Pollutant Migration" (Application No. 201420645580.5, Publication No. 2014116337U) Both adopt multiple sampling ports on the outside to collect the leach solution. Although this device solves the problem of layered sampling, it cannot distinguish whether the collected leach solution is the leaching water that penetrates the upper vadose zone or the soil column is full of water at the bottom of the column. back water
At the same time, the above-mentioned devices all use the leached soil column as backfill soil, which is not representative of the region.

Method used

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  • Undisturbed soil layered leaching sampling device
  • Undisturbed soil layered leaching sampling device
  • Undisturbed soil layered leaching sampling device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] like figure 1 As shown, the undisturbed soil layered leaching sampling device includes an undisturbed soil component, and a leaching solution collection device for collecting the undisturbed soil component leaching solution.

[0026] like figure 1 , 2 As shown, the undisturbed soil assembly includes a circular tubular upper soil collection container 21, a cylindrical upper undisturbed soil body 2 arranged inside the upper soil collection container 21, a circular tubular middle soil collection container 41, and a middle soil collection container 41 Inner cylindrical middle layer undisturbed soil body 4, circular tubular lower soil-borrowing container 61, cylindrical lower-layer undisturbed soil body 6 arranged inside the lower soil-borrowing container 61, water barrier 8 for sealing the lower soil-borrowing container 61 lower ends, the The lower end surface of the upper undisturbed soil body 2 is flush with the lower end surface of the upper soil borrowing container 21...

Embodiment 2

[0038] In conjunction with embodiment 1, the present invention is further described to "Research on the mechanism of nitrogen loss in sand ginger black soil under rainfall conditions":

[0039] The large pores in the surface soil of Shajiang black soil are developed, and the deep soil contains sand ginger. The above-mentioned structural characteristics of Shajiang black soil have been changed due to backfill disturbance, and it takes a long time for the backfill soil to return to natural conditions. Therefore, the leaching experiment was carried out with undisturbed soil collected in the field better and more convenient regional representation. Similarly, the literature "Effects of Eutrophic River Water Irrigation on the Contribution of Nitrogen and Phosphorus Nutrients in Paddy Soil—Taking Yellow Soil in the Taihu Lake Area as an Example" compared and analyzed the nitrogen leaching forms of undisturbed soil and backfill soil, and found that the undisturbed soil nitrogen The a...

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Abstract

The invention relates to an undisturbed soil layered leaching sampling device which comprises an undisturbed soil body assembly and a leaching solution water collecting device used for collecting a leaching solution of the undisturbed soil body assembly. According to the invention, sampling of an original-state soil body leaching solution is achieved, damage of backfilling operation to a soil microstructure is avoided, and the regional representativeness of the collected leaching solution is better. Automatic sampling of an initial leaching solution is achieved, the device can operate in an unmanned environment, the collected water sample is the leaching solution which penetrates through an upper aeration zone and leaks at the initial stage, and the device is particularly suitable for rapid solute transport in aeration zone priority flow and non-equilibrium kinetic mechanism research. Synchronous sampling of leaching solutions of multiple layers of a soil body is achieved; except for the difference of aeration zone factors of the corresponding layers, other experimental conditions of each layer are basically consistent, and the influence of the aeration zone thickness on leaching pollutant composition and flux can be analyzed conveniently. Aiming at the layering property of the tested soil and the regional underground water burial depth characteristics, the design of changing the overall soil column, the layering soil column height and the like is conveniently realized.

Description

technical field [0001] The invention relates to a layered leaching sampling device for undisturbed soil, which belongs to the technical fields of environmental science and soil hydrological test. Background technique [0002] Excessive fertilization and use of pesticides in farmland are important causes of shallow groundwater pollution. The soil leaching sampling device is the main device for studying nutrients, pesticides, heavy metals, etc. penetrating the vadose zone into shallow groundwater. At the same time, due to the difference in soil structure between the undisturbed soil and backfill soil in farmland, especially the backfill operation destroys the root system on the surface layer and the preferential channel formed by animal burrows, which affects the infiltration flux and the composition of the drench solution. The dynamic change of groundwater burial depth, that is, the dynamic change of vadose zone thickness, changes the adsorption-desorption kinetic time of nu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24
CPCG01N33/24G01N2033/245G01N2033/248
Inventor 胡勇章启兵周超王兵陈小凤董国强王敏杰胡永胜
Owner 安徽省(水利部淮河水利委员会)水利科学研究院(安徽省水利工程质量检测中心站)
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