Soil air pressure monitoring device and monitoring method thereof

Abstract

The invention discloses a soil air pressure monitoring device and a monitoring method thereof. The soil air pressure monitoring device comprises an air pressure monitoring device body, a water level control device and soil air collection and pressure devices, wherein the air pressure monitoring device body consists of a soil air pressure monitoring sensing component, a soil air collection and pressure balance device, an air pressure compensation meter composition, a pressure conduction pipe, an observation panel, a soil air pressure measuring pipe, an atmosphere pressure measuring pipe, a scale meter, a water level control device and an atmosphere pressure meter; the soil air collection and pressure balancing device arranged on the air pressure monitoring device body is communicated with the soil air; the water level control device is communicated with the local atmosphere; the soil air pressure measuring pipe is a soil air pressure measuring pipe; when the air pressure difference exists between the air pressure in the soil and the atmosphere pressure, observation liquid at the two sides of the soil air pressure measuring pipe can be driven to vertically move; through observing theliquid level difference in the soil air pressure measuring pipe, the air pressure difference between the air pressure in the soil and the atmosphere can be calculated; the soil air pressure is further calculated.

Description

technical field [0001] The invention relates to the technical field of soil air pressure monitoring, in particular to a soil air pressure monitoring device and a monitoring method thereof. Background technique [0002] The infiltration process of water in the vadose zone is essentially the displacement process of water and air in porous media. The traditional theory of moisture migration in the vadose zone holds that the fluidity of air is much greater than that of water, and air can enter and exit freely, so the change of air pressure in the vadose zone is ignored. In fact, in the mutual displacement process of water and air, the flow of air will produce infiltration resistance or retardation to the infiltration rate of water. The core issue in the study of water-gas two-phase flow in the unsaturated zone is the interaction effect and mechanism of water and gas movement in the vadose zone. [0003] At present, there are mature monitoring equipment for moisture in the unsa...

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Problems solved by technology

[0003] At present, there are mature monitoring equipment for moisture in the unsaturated zone (soil moisture content, soil water potential, temperature, etc.), but the outstanding problem is that there is no corresponding monitoring equipment for the change of soil gas phase (soil air pressure), which seriously hinders the water-gas two-phase flow research work

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