Regional soil humidity monitoring method based on equivalent rainfall estimation method

A soil moisture and equivalent technology, applied in measurement devices, measurement of scattering characteristics, re-radiation of electromagnetic waves, etc., can solve the problem of poor optical image penetration, difficulty in monitoring large-area soil moisture, and easy to be affected by weather, etc. problem, to achieve the effect of high-precision detection of soil moisture
CN114397276APending Publication Date: 2022-04-26NORTH CHINA INST OF AEROSPACE ENG
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NORTH CHINA INST OF AEROSPACE ENG
Publication Date
2022-04-26

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Abstract

The invention provides a regional soil humidity monitoring method based on an equivalent rainfall estimation method, which comprises the following steps of: firstly, acquiring a satellite image of a test region, generating backscattering coefficient image data and normalized vegetation index image data, establishing a plurality of buffer regions, classifying land utilization types of the buffer regions, and acquiring corresponding vector data; performing mask extraction on the backscattering coefficient image data and the normalized vegetation index image data through vector data to obtain corresponding data of two polarization directions of a radar backscattering coefficient and normalized vegetation index data, and obtaining meteorological data before the image; and analyzing the meteorological data, the data of the two polarization directions of the backscattering coefficient and the normalized vegetation index data to obtain an equivalent precipitation model related to the soil humidity, and calculating the soil humidity. According to the regional soil humidity monitoring method based on the equivalent rainfall estimation method, radar images and optical images are combined, and regional soil humidity monitoring can be achieved.
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Description

technical field

[0001] The invention relates to the technical field of soil moisture quantitative inversion, in particular to a regional soil moisture monitoring method based on an equivalent precipitation estimation method. Background technique

[0002] Soil moisture is the main control variable of water and energy cycles on the earth's surface. It plays an important role in the transfer of water and heat and energy exchange between the land-atmosphere interface. One of the important indicators of production estimation.

[0003] At present, there are two main monitoring methods of soil moisture, the traditional field measurement method and the remote sensing method. Monitoring soil moisture solves the shortcomings of traditional methods by virtue of its advantages of wide monitoring range, fast timeliness, and long-term dynamic monitoring. Remote sensing data mainly include optical remote sensing and microwave remote sensing. Among them, optical remote sensing data is eas...

Claims

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