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Measurement method for measuring thickness of soil layer based on magnetic susceptibility

A measurement method and a technology of magnetic susceptibility, which are applied in the field of foundation soil survey, electromagnetic measuring device, electric/magnetic thickness measurement, etc., can solve the problems of large measurement deviation and the inability to carry out soil erosion measurement work effectively, and achieve low equipment cost , the effect of large measurement range

Active Publication Date: 2019-01-01
NORTHWEST A & F UNIV +2
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Problems solved by technology

[0005] This application provides a method for measuring soil layer thickness based on magnetic susceptibility, in order to solve the problems of ineffective soil erosion measurement and large measurement deviation in the prior art

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  • Measurement method for measuring thickness of soil layer based on magnetic susceptibility
  • Measurement method for measuring thickness of soil layer based on magnetic susceptibility
  • Measurement method for measuring thickness of soil layer based on magnetic susceptibility

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Embodiment Construction

[0026] Please refer to the attached figure 2 , which shows the flow steps of a method for measuring soil layer thickness based on magnetic susceptibility provided in an embodiment of the present application.

[0027] A method for measuring soil layer thickness based on magnetic susceptibility, also referred to as the magnetosphere detection method, is a soil layer thickness that combines the magnetic susceptibility measurement technology in geophysical research, the magnetic difference of common substances, and the law of soil erosion. rapid measurement methods, including:

[0028] Step S1: Determination of the original magnetic susceptibility K of the topsoil layer of the sample point soil b .

[0029] Before the formal measurement, the original magnetic susceptibility K b is determined, the original magnetic susceptibility K b It is also called background topsoil magnetic susceptibility (K-background, referred to as K b ).

[0030] Step S2: Determining the maximum mag...

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Abstract

The invention provides a measurement method for measuring the thickness of a soil layer based on the magnetic susceptibility, and relates to the technical field of soil erosion monitoring. The measurement method comprises the steps of measuring the original magnetic susceptibility Kb of a surface soil layer of sampling point soil; measuring the maximum magnetic susceptibility Km of the surface soil layer when a magnetic member is placed on the surface soil layer; burying the magnetic member at the preset depth below the sampling point soil to form a magnetic layer; measuring the first magneticsusceptibility K1 of the surface soil layer right above the magnetic layer; measuring the second magnetic susceptibility K2 of the surface soil layer right above the magnetic layer after an intervalof preset time; and calculating a thickness variation values of the soil layer according to a conversion equation between the magnetic susceptibility of the soil layer and the thickness of the soil layer. The measurement method provided by the invention for measuring the thickness of the soil layer based on the magnetic susceptibility has extremely small or no disturbance to the sampling point soil layer, can obtain a measurement result quickly and accurately, does not need any special manual maintenance, is good in representativeness in sampling point soil layer, and has high practicability in soil resource protection, soil erosion monitoring scientific research and field monitoring.

Description

technical field [0001] The present application relates to the technical field of soil erosion monitoring, in particular to a method for measuring soil layer thickness based on magnetic susceptibility. Background technique [0002] Soil erosion is a serious soil degradation process that restricts the sustainable use of agricultural soil resources worldwide. The basic principle of soil erosion measurement is to directly or indirectly monitor the dynamic changes of soil layer thickness caused by soil erosion at different temporal and spatial scales. The process of soil erosion is very complex, and this process is often not easy to monitor quantitatively. As a method of directly measuring the amount of soil erosion, the erosion needle method measures the increase or decrease in the thickness of the surface soil layer after the loss or accumulation of the surface soil by measuring the distance between the tip of the erosion needle and the soil surface. Specifically, inserting a...

Claims

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Application Information

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IPC IPC(8): G01B7/06
CPCG01B7/10E02D1/00E02D17/20A01B47/00A01B76/00
Inventor 刘亮张科利刘宝元黄明斌符素华张加琼
Owner NORTHWEST A & F UNIV
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