Detecting device for infiltration performance of earth pillar

Abstract

The invention discloses a detecting device for the infiltration performance of an earth pillar. The detecting device comprises a base, a horizontal rotation adjusting mechanism, an earth pillar inlet-outlet adjusting mechanism and a height adjusting mechanism, wherein the horizontal rotation adjusting mechanism is arranged on the base; the earth pillar inlet-outlet adjusting mechanism is arranged on the horizontal rotation adjusting mechanism; the height adjusting mechanism is arranged on the earth pillar inlet-outlet adjusting mechanism. According to the invention, the device can directly detect the migration of the wetting front during the earth pillar infiltration process, and can quickly detect multiple indexes ( temperature, electric conductivity, pH and the like) during the earth pillar infiltration process, is simple in structure, can realize the detection on related indexes during the indoor earth pillar infiltration process, and can also realize the detection on related indexes during the outdoor undisturbed soil infiltration process, thereby being suitable for relevant colleges and universities as well as scientific research institutions to carry out quick detection of relevant parameters during the earth pillar infiltration process.

Description

technical field [0001] The invention relates to a soil column infiltration performance detection device, in particular to a soil column infiltration wetting front migration and related index detection device, which belongs to the technical field of water-saving irrigation. Background technique [0002] Infiltration is a physical phenomenon in which water infiltrates into the soil. It is a water exchange process on the land surface that is combined with factors such as soil hydraulic properties, water conditions, and water supply conditions. It is related to hydrological conversion, soil erosion, soil moisture, nutrients, salt, and heavy metal ion migration. are closely related. Infiltration is represented by the infiltration water depth per unit time (that is, infiltration intensity or infiltration rate), or by the cumulative infiltration curve over time. When water infiltrates into the soil, some physical properties of the soil will change with the infiltration of water, s...

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Problems solved by technology

Among them, the real-time automatic measurement system of soil infiltration performance is mainly aimed at the measurement of soil runoff, which is not suitable for soil column infiltration; a device and method for measuring the infiltration coefficient of unsaturated soil is the infiltration coefficient of unsaturated soil, but the device If higher measurement accuracy is required, more moisture sensors and moisture tensiometers are required, and the cost of the device is high. At the same time, the iterative method is used to obtain the moisture infiltration coefficient, which is complicated in operation and low in automation; an adjustable soil infiltration performance detection It is only suitable for indoor soil column test, and can only test the infiltration performance on one side of the soil column.

The migration of the wetting front of the automatic measurement device for soil moisture and solute migration parameters is obtained through calculation, and the accuracy is not high enough

The devices and methods mentioned above cannot meet the requirements of both indoor and outdoor testing of soil column infiltration performance, and these devices cannot directly detect the wetting front migration of soil column infiltration. Complicated, the detection indicators are not comprehensive enough, and cannot accurately reflect the impact of water infiltration on soil column pH, salinity, temperature and other related indicators

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