An In-Situ Measurement System for Soil Saturated Hydraulic Conductivity and Air Conductivity

Abstract

The invention discloses an in-situ measurement system for soil saturated hydraulic conductivity and air conductivity, which includes an air supply source (1) and a water supply source (9), and is characterized in that the measuring cylinder (7) is equipped with a water inlet (8), the water inlet (8) is tightly connected to the water supply source (9) through the first connecting hose (10); the top of the measuring cylinder (7) is airtightly connected to the rubber plug (6), and the rubber plug (6) Connect the tee (4), a branch pipe of the tee (4) is sealed to the gas supply source (1) through the second connecting hose (12), the gas supply source (1) is connected to the gas flow regulating valve (2) and the gas The flowmeters (3) are connected in series; the other branch of the tee (4) is connected to the air pressure measuring meter (5) through the third connecting hose (13); this system can realize in-situ soil air conductivity and soil saturation The continuous observation of hydraulic conductivity reduces the disturbance to the measured soil, makes the measurement results more accurately reflect the actual situation, and ensures that the soil air conductivity and soil saturated hydraulic conductivity are consistent with the measured soil, laying the foundation for establishing a correct quantitative relationship between the two. foundation.

Description

technical field [0001] The invention relates to the technical field of soil physics, in particular to an in-situ measurement system for soil saturated hydraulic conductivity and air conductivity. Background technique [0002] The water and air content and their migration characteristics in the soil affect soil fertility and play a decisive role in plant growth. Studying the migration law of water and air in soil and determining its related parameters are the basis for rational irrigation, improving the aeration environment of plant soil root zone, and improving agricultural production. At the same time, it is also very important for controlling soil erosion, surface water and groundwater pollution. significance. Therefore, it is very important to obtain soil water and air migration parameters quickly and accurately. soil saturated hydraulic conductivity and soil air permeability It is a key parameter to characterize the migration characteristics of soil water and air....

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, and provide a kind of in-situ measurement system of soil saturated hydraulic conductivity and air conductivity, which mainly solves the problems of existing measurement methods. and During the process, the soil core was disturbed and the measurement results were quite different from the actual situation in the field.

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