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Multi-scale thermal inertia model inversion-based method for measuring moisture content of surface soil

A multi-scale, water content technology, applied in soil material testing, measuring devices, material analysis by optical means, etc., can solve problems such as unsatisfactory inversion results

Active Publication Date: 2018-11-16
SOUTH CHINA AGRI UNIV
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Problems solved by technology

[0005] Although many thermal inertia models have been used to invert soil water content, the inversion results are not very satisfactory when used for soil water content inversion in vegetation areas

Method used

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  • Multi-scale thermal inertia model inversion-based method for measuring moisture content of surface soil
  • Multi-scale thermal inertia model inversion-based method for measuring moisture content of surface soil
  • Multi-scale thermal inertia model inversion-based method for measuring moisture content of surface soil

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Embodiment Construction

[0053] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0054] figure 1 It is a schematic flow chart of the soil surface water content measurement method based on multi-scale thermal inertia model inversion in the embodiment of the present invention, as figure 1 As shown, the soil moisture content measurement methods include:

[0055] S11: Perform discrete wavelet transform analysis on the ASTER thermal infrared images with 15-meter resolution and 90-meter resolution to obtain high-definition ASTER thermal infrared ima...

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Abstract

The invention discloses a multi-scale thermal inertia model inversion-based method for measuring the moisture content of surface soil. The method for measuring the moisture content of the surface soilcomprises the following steps: performing discrete wavelet transform analysis on an acquired ASTER thermal infrared image to acquire a high-definition ASTER thermal infrared image; acquiring and calculating a surface component temperature according to the high-definition ASTER thermal infrared image; calculating a surface albedo through a weight function for converting a narrow band albedo into awide band albedo; estimating a surface sensible heat flux according to the high-definition ATER thermal infrared image; calculating a surface latent heat flux by an energy residual method according to the surface sensible heat flux; calculating a thermal inertia of the soil according to the surface component temperature, the surface sensible heat flux, the surface latent heat flux and the surfacealbedo; and building a surface soil moisture content inversion model according to the thermal inertia of the soil. By implementation of the method of the embodiment, the measurement precision of themoisture content of the soil within a detected region can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of soil water content measurement and calculation, in particular to a soil surface water content measurement method based on multi-scale thermal inertia model inversion. Background technique [0002] Changes in soil water content affect surface energy balance, regional runoff, soil erosion, and vegetation productivity; therefore, it is very important to invert soil water content information; however, traditionally, soil water content information is usually obtained from on-site measurements, which is time-consuming It is expensive, and traditional methods lack the ability to generate spatial distribution and soil water content patterns; on the other hand, remote sensing technology can quickly and accurately estimate soil water content in space, and monitor its dynamics at low cost on a regional scale ; The use of remote sensing imagery to estimate the spatial distribution of surface soil moisture over large ...

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Application Information

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IPC IPC(8): G01N21/84G01N33/24
CPCG01N21/84G01N33/246
Inventor 胡月明刘振华赵理
Owner SOUTH CHINA AGRI UNIV
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