Test system and method capable of observing aeration airflow flow distribution in water-containing soil layer

Abstract

The invention provides a test system and method capable of observing aeration airflow flow distribution in a water-containing soil layer. The test system comprises a transparent sample box, an air flow measuring device, an optical observation module and an aeration module. The gas flow measuring device is composed of a gas flow separation box, a three-way valve, a connecting pipeline and a gas flow meter. Wherein the airflow separation box and the sample box are connected through bolts and rubber pads and are detachable, so that sample preparation is facilitated, and the sealing performance isguaranteed; airflow partition plates are arranged in the airflow partition box to form a plurality of independent cavities, so that airflow is separated and flows out; three-way valves are installedat flow outlets of all the cavities and connected with flowmeters through pipelines, and accurate and rapid observation of soil layer surface layer airflow flow distribution is achieved. The device has the advantages of capability of observing soil layer airflow flow distribution, convenience in sample preparation, simplicity in operation, high airflow flow observation precision and the like.

Description

technical field [0001] The invention relates to the technical fields of water conservancy and hydropower engineering and environmental protection engineering, in particular to a test system and method for observing the flow distribution of aeration air flow in a water-bearing soil layer. Background technique [0002] Groundwater is an important source of domestic and industrial water in my country. Recent survey results show that 18% of the country's water supply comes from groundwater. In the water supply in northern China, groundwater exploitation accounts for a higher proportion, providing about 65% of domestic water, 33% of irrigation water and 50% of industrial water. In recent years, my country's urbanization and industrialization process has been rapidly advancing, but it is accompanied by increasingly serious organic pollution of groundwater. According to the survey results of groundwater pollution in the Beijing-Tianjin-Hebei region in 2013, 29.17% of the shallow gr...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a test system and method for observing the flow distribution of aeration air flow in the water-bearing soil layer, so as to solve the problem in the prior art that there is no test device capable of accurately and efficiently observing the flow distribution characteristics of the aeration air flow in the soil layer

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