Soil saturation hydraulic conductivity measuring and calculating method based on infiltration time characteristic parameters

A technology of infiltration time and characteristic parameters, which is applied in the field of soil physics, can solve problems such as complexity and lengthy calculation process, and achieve the effects of reducing measurement links, improving calculation efficiency, and reducing calculation time

Inactive Publication Date: 2010-06-30
LUDONG UNIVERSITY
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Problems solved by technology

[0007] The purpose of the present invention is to overcome above-mentioned deficiencies in the prior art, and provide a kind of soil saturated hydraulic conductivity measurement method based on infiltration time characteristic parameter, mainly solve existing method and need to measure the change of soil volume moisture content before and after infiltration and Calculations are lengthy and complex

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  • Soil saturation hydraulic conductivity measuring and calculating method based on infiltration time characteristic parameters
  • Soil saturation hydraulic conductivity measuring and calculating method based on infiltration time characteristic parameters
  • Soil saturation hydraulic conductivity measuring and calculating method based on infiltration time characteristic parameters

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Embodiment 1

[0023] Embodiment 1: the first step, firstly measure the soil saturated hydraulic conductivity parameter k s The quantitative relationship with the characteristic parameter values ​​of the corresponding infiltration time data. Use the Philip-Dunne infiltration method at several test points in the area to be tested, and use the Philip-Dunne infiltration instrument, that is, a transparent plastic straight pipe with a diameter of about 5cm and a length of about 35cm (but longer than 30cm). The Dunne infiltration instrument is inserted at a depth of about 10cm below the soil surface, and the soil in the pipe is taken out, and the multi-dimensional infiltration experiment of rainfall head is carried out outdoors on the fields where the soil saturated hydraulic conductivity needs to be measured. The initial water head of the Philip-Dunne infiltrator is kept at 30cm, and the initial value of the soil volume moisture content before and after the experiment is measured by the TDR soil ...

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Abstract

The invention provides a soil saturation hydraulic conductivity measuring and calculating method based on infiltration time characteristic parameters. In the method, the quantitative relation of the characteristic parameters (skewness, kurtosis and variation coefficients) of soil saturation hydraulic conductivity and infiltration time data is built on the basis of analyzing Philip-Dunne infiltration data under three soil texture conditions of clay, loam, sand and the like, and the water content change of soil before and after infiltration does not need any consideration when the method is utilized to measure and calculate the soil saturation hydraulic conductivity, and only the accumulative infiltration time which corresponds to different water levels in a Philip-Dunne infiltration meter needs to be observed, therefore simplifying the calculating process of the saturation hydraulic conductivity and increasing the measuring efficiency.

Description

Technical field: [0001] The invention relates to the field of soil physics, in particular to a method for measuring and calculating soil saturated hydraulic conductivity based on characteristic parameters of infiltration time. Background technique: [0002] The saturated hydraulic conductivity of the soil k s It is the amount of water passing through a unit area in a unit time under a unit water potential gradient when the soil is saturated with water. Soil saturated hydraulic conductivity is one of the important physical properties of soil. It is an important soil parameter for estimating soil unsaturated hydraulic conductivity, calculating water flux in soil profile and designing irrigation and drainage system engineering. At the same time, the acquisition and mastery of soil moisture conduction parameters is also very important for understanding and controlling soil water and surface water pollution. Therefore, it is of great significance to quickly and accurately meas...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
Inventor 张振华杨润亚任尚岗潘英华何福红
Owner LUDONG UNIVERSITY
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