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Study of Application of Low-frequency Microwave Band GPR to Measure Soil Moisture Content

Author: MaoXing
Tutor: JinSheng
School: Chinese Geology University (Beijing)
Course: Earth Exploration and Information Technology
Keywords: Soil moisture Ground Penetrating Radar Soil dielectric model
CLC: S152.7
Type: Master's thesis
Year: 2010
Downloads: 54
Quote: 0
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Abstract


Soil moisture content reflects an important physical indicators of soil physical properties , soil moisture based on the needs of different areas of multi-scale features showing large regional scale to the middle of the river basin scale to small -scale farmland great demand. There are many measurements of soil moisture content , and these methods have their own strengths , for middle -scale measurement method is relatively empty , ground penetrating radar to measure soil moisture has made ??some progress , and the method for intermediate scale measurement is more suitable than the other methods are more potential . The ground-penetrating radar to measure soil moisture content , based on the dielectric properties of soil physical basis . Previous study on the dielectric characteristics of the soil , especially the aqueous soil dielectric model , most of them at above 1GHz high-frequency band range . In different frequency bands within the dielectric properties of the soil is very different , and therefore the need for further study of soil dielectric properties of the ground penetrating radar working frequency band from 10MHz to 1GHz . In this paper, the application of low-frequency microwave band GPR measure soil moisture research title , both soil and sand media , soil tank through a series of physical model experiments to establish the water content with GPR wave velocity of the two different media the relational model , ground-penetrating radar to measure soil moisture content provides a foundation , is a complement to previous studies and validation experiments , to verify the accuracy and reliability of the model . This study also proposed on the basis of this model relationship GPR reflected wave soil moisture calculated manually preset reflector .

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CLC: > Agricultural Sciences > Agriculture as the foundation of science > Soil > Soil physics > Soil moisture
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