Calibration method for soil resistivity and soil water content of rocky mountainous area

A technology of soil resistivity and soil moisture content, applied in the direction of material resistance, can solve the problems of inability to carry out continuous measurement in time and space, limited measurement depth, etc., and achieve the effect of convenient soil resistivity, significant relationship, and high sensitivity

Inactive Publication Date: 2016-03-23
SOUTHWEST FORESTRY UNIVERSITY
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Problems solved by technology

Time-space continuous measurement cannot be carried out, and the measurement depth is limited

Method used

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  • Calibration method for soil resistivity and soil water content of rocky mountainous area
  • Calibration method for soil resistivity and soil water content of rocky mountainous area
  • Calibration method for soil resistivity and soil water content of rocky mountainous area

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Experimental program
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Embodiment

[0028] 1. The relationship between soil resistivity and moisture content based on the calibration experiment in the soil box

[0029] In order to use the measured value of soil resistivity to calculate the slope change of soil water content, the slope soil of Yunnan Pine forest in Mopan Mountain, Yunnan was used to conduct an experiment of artificially controlling water content, gravel content, bulk density and porosity. Statistical analysis of soil resistivity (Y, Ωm) and soil volumetric water content (X 1 , v%), soil gravel volume content (X 2 , v%), soil bulk density (X 3 ,kg / m 3 ) Quantitative relationship.

[0030] First, the influence of individual factors on soil resistivity was analyzed, such as Figure 1-3 . The relationship between soil volume moisture content and soil resistivity is Y=560.89e -0.3935X1 , R 2 =0.94, indicating that the soil resistivity gradually decreases with the increase of soil water content; the fitting relationship between soil gravel vol...

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Abstract

The invention discloses a calibration method for the soil resistivity and soil water content of a rocky mountainous area. The soil profile is dug at the depth of 100 cm at the position of a fixed transect line for measurement of the resistivity of a slope, undisturbed soil is collected through a ring knife for measuring the soil bulk density, the porosity and the capillary water holding capacity, and a square ring knife is sued for sampling for measuring the content of gravel; soil is taken according to the sequence from 0 cm of the soil layer to 100 cm on the lower layer, and the soil is aired and screened; fine soil is flatly laid in boxes in a layered mode, the boxes are weighed, the soil of all the layers is evenly distributed into the three boxes, and the boxes are numbered and weighed; a multi-electrode resistance instrument method and an initial resistivity conversion imaging system are adopted; water controlling correction is carried out; the relation of the soil resistivity and the gravel volume content is corrected; the relation of the soil resistivity and the soil bulk density is corrected; a calibration relation equation only for the soil water content and the soil resistivity is obtained, and thus the soil water content of a continuous space of the slope is obtained through the soil resistivity. It is convenient to use a multi-electrode resistance instrument for measuring the soil resistivity of the slope of the mountainous area.

Description

technical field [0001] The invention belongs to the technical field of water and soil conservation, and relates to a calibration method for soil resistivity and soil water content in rocky mountainous areas. Background technique [0002] In the prior art, when studying the spatial-temporal variation of soil moisture, some measurement methods, such as soil drilling and time-domain reflectometry, can only ensure the time continuity of "point" soil moisture, but for the "surface" that reflects spatial variation, the continuous Measurement is useless. Time-space continuous measurement cannot be carried out, and the measurement depth is limited. Contents of the invention [0003] The purpose of the present invention is to provide a calibration method for soil resistivity and soil water content in rocky mountainous areas, and to provide the distribution of soil water in the continuous space of mountain slopes and its variation with time. [0004] The technical scheme adopted i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/04
Inventor 赵洋毅段旭赵英伟孙世梅
Owner SOUTHWEST FORESTRY UNIVERSITY
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