Device for simulating soil groundwater oxygen content gradient distribution under hydrostatic condition

Abstract

The invention relates to a device for simulating soil groundwater oxygen content gradient distribution under a hydrostatic condition and can provide a simulated environment for related experiments and projects of researching pollutant transportation, reaction and control in different oxygen content conditions caused by groundwater body layering. The device comprises a rainfall device, a test earth pillar and an anaerobic water supply device, wherein the rainfall device comprises a water tank, a water inlet pump, a flow valve, a shower head and a connection pipeline, and the flow valve can be adjusted to control rainfall intensity; the test earth pillar comprises a plurality of detachable assembled assemblies of the same specification, each assembly is formed by assembling two half-cylinder tubes, the inside of the assembly is dull polished, and a series of holes are formed in the lateral edge to be connected with a sampling device; the anaerobic water supply device comprises an improved Mariotte bottle, a connection pipe with a valve and a connection disk with a permeable stone inner core. When the device is utilized, the transportation and reaction situation of pollutant in an aerobic, anaerobic and oxygen-deficient environment generated by an uneven water-gas distribution condition of an unsaturated-saturated zone can be taken into consideration and researched. Meanwhile, the device is suitable for simulation experiments of different lengths by assembling and disassembling different amount of models, so that the using rate of the models is improved, and cost is reduced.

Description

technical field [0001] The invention relates to a simulation device for a pollutant migration reaction transformation test in the unsaturated-saturated zone of soil and groundwater under hydrostatic conditions, especially considering the research of pollutants affected by the different oxygen content of groundwater during the vertical migration process. [0002] technical background [0003] With the rapid advancement of the country's industrialization and sustained economic development, environmental pollution has become increasingly serious, especially the environmental problems of water resources have become more prominent. With the serious pollution and shortage of surface water resources, groundwater pollution has also become increasingly serious. However, due to the invisibility of groundwater below the surface and the complexity of the underground environment, it is difficult to rely on the soil-groundwater system to repair itself. Once it is polluted, it is very diffic...

AI Technical Summary

Problems solved by technology

At present, the vertical soil column test model used in the laboratory is relatively simple and has a single function. The specific problems are as follows:

[0007] 3. There is no follow-up upgrade space for functional modules

With the deepening of research, model functions and parameters need to be constantly adjusted. However, existing models generally do not consider subsequent improvements, cannot adapt to experiments of different lengths or depths, and have a low reuse rate.

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