Soil frozen depth measuring device and measuring method

Abstract

The invention belongs to the field of winter ecological studies, and relates to a soil frozen depth measuring device. The soil frozen depth measuring device comprises a PVC sealing plug 1, a methyleneblue solution 2, a transparent PVC tube 4 and scale lines 3 arranged on the outer wall of the transparent PVC tube 4, wherein the PVC sealing plug 1 plays a sealing role; the concentration of the methylene blue solution 2 is 2 percent; the length of the transparent PVC tube 4 can be selected according to a desired measuring depth; when a measuring depth is within 1 to 2 m, a hard transparent PVCtube 4 can be used for directly measuring the measuring depth; and when a measuring depth is more than 2 m, a soft transparent PVC tube 4 extends into a perforating position, so as to facilitate taking out and measurement. The invention further relates to a soil frozen depth measuring method. The device and the method of the invention are low in cost, good in frozen measuring effect, accurate in data, convenient to use, operate and store, and are suitable for prairie field experiments.

Description

technical field [0001] The invention relates to the field of winter ecology research, in particular to a soil freezing depth measuring device and a measuring method. Background technique [0002] Soil is the main living environment for land plants. The soil contains more or less water. When the soil temperature drops below 0°C in winter, the water in the soil will condense into ice and freeze together with the soil particles, thus forming frozen soil. Just like the fact that no matter how cold the rivers and lakes are in winter, it is difficult for them to freeze as a whole, the soil also has a huge heat capacity. Although the upper layer is frozen, after reaching a certain soil layer, its temperature does not drop any more and remains at a basically constant level all year round, and the temperature of this soil layer does not change with the external environmental conditions. This layer is called constant temperature layer. The freezing depth of the soil depends on the ...

AI Technical Summary

Problems solved by technology

The existing method for measuring the thickness of the seasonally frozen soil layer is based on "in the seasonally frozen soil area, the resistivity of the upper layer of soil is much greater than that of the lower layer of soil, and the depth of one of the two electrodes buried in the ground increases, which will cause The potential difference between two points on the ground surface will drop, and the grounding resistance will drop sharply after the current pole penetrates the upper layer of frozen soil, resulting in a sharp decrease in the rate of change of the ground surface potential difference. Although it solves the problem of seasonal frozen soil thickness measurement, there is a cost High, complex structure, limited power supply conditions and other unfavorable factors

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