Simple deep soil gas sampler and sampling method thereof

Abstract

The invention discloses a simple deep soil gas sampler and a sampling method thereof. The simple deep soil gas sampler comprises a gas collecting pipe with a plurality of gas vents distributed on a peripheral wall and a gas guiding pipe, wherein one end of the gas collecting pipe is arranged as a sealing end while the other end is communicated with the gas guiding pipe; a three-way valve is arranged at the tail end of the gas guiding pipe; a waterproof gas-permeable membrane is adhered to an inner peripheral wall of the gas collecting pipe; the gas vents are divided into two sets and are linearly distributed on the pipe walls on the two opposite sides of the gas collecting pipe; and the straight lines of the gas vents are parallel to each other and are arrayed along the length direction of the gas collecting pipe. The sampler can be placed in different soil depths according to test requirements, the gases in the soil layers in different depths can be collected, and the gas concentration thereof can be conveniently determined, so that the distribution characteristics of the soil gases in different depths can be verified, and the concentration gradients and diffusion rates of the soil gases in different depths can be estimated. The sampler has an excellent sealing performance, the outside atmospheric environment almost has no interference to the sampler, the experimental result error is small, and the precision is high.

Description

technical field [0001] The invention relates to the technical field of soil science, in particular to a simple deep soil gas sampler and a sampling method thereof. Background technique [0002] Various material cycles in the ecosystem are of great significance, especially the global material cycle is a hotspot of current research, such as the global carbon cycle, among which soil is one of the most important research fields. As a porous medium, soil contains a large amount of trace gas components (including CO 2 、CH 4 , N 2 O, etc.). Soil air basically comes from the atmosphere, but a small amount is also produced by biochemical processes in the soil. As one of the important components of soil, soil air is of great significance to plant growth and soil formation. Soil air research is an important aspect in soil science, environmental science, ecology, hydrology, geology, geography and other disciplines, and the collection of soil air is the basis of soil air research. ...

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Problems solved by technology

[0006] Finally, there are some devices with relatively small errors nowadays, but they need to provide power equipment, and some even need air pumps, which makes t

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