Large-buried-depth soil permeability coefficient and moisture diffusion coefficient measuring system and method

Abstract

The invention discloses a large-buried-depth soil permeability coefficient and moisture diffusion coefficient measuring system and method and relates to the technical field of agricultural water-soil engineering. The system comprises a sampling module, a sample preservation module and a measuring module. The sampling module is used for sampling large-buried-depth soil to obtain a soil sample with the volume consistent with the inside volume of a transparent organic glass soil pillar. The sample preservation module is used for preserving the transparent organic glass soil pillar containing the soil sample through a transparent container and pressurizing the soil sample in the transparent organic glass soil pillar through two water-permeable stones connected with the upper section and the lower section of the transparent container respectively. The measuring module is used for detecting the permeability coefficient and the moisture diffusion coefficient of the tested soil after acquiring a preset volume of tested soil from the transparent organic glass soil pillar according to containing marks on the transparent organic glass soil pillar. The advantages that the state of the soil sample is effectively kept, and then the accuracy of the measured permeability coefficient and moisture diffusion coefficient of the soil is improved are achieved.

Description

technical field [0001] The invention relates to the technical field of agricultural water and soil engineering, in particular to a large buried depth soil permeability coefficient and water diffusion coefficient measurement system and a large buried depth soil permeability coefficient and water diffusion coefficient measurement method. Background technique [0002] In the field of agricultural water and soil engineering technology, soil sampling is often required for related studies such as soil hydrological processes. For example, for the study of soil hydrological processes, soil physical parameters and their hydrodynamic characteristic parameters are important basis. In order to obtain soil physical parameters and their hydrodynamic characteristic parameters, the original soil sampling and laboratory measurement are generally used. However, with the large-scale exploitation of groundwater, the buried depth of the groundwater level in the North China Plain dropped from 2 ...

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Problems solved by technology

In the process of taking soil, because the soil body in the ring knife is not pressurized at the upper and lower ends, it is often during the soil sampling process, so that the soil obtained by sampling will expand and other deformations relative to the original depth position. Moreover, the existing The method for measuring the soil permeability coefficient and water diffusion coefficient at a large buried depth cannot timely and effectively carry out pressure treatment on the soil sample, so that the soil sample can be restored to the state at the time of the large buried depth, so that the measured soil permeability coefficient and water diffusion coefficient decrease in accuracy

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