土壤水分广义电磁测量方法的潜力分析

The Potential Analysis on Soil Moisture Measurement by Electromagnetic Method

以我国代表性土壤的理化特性层间和空间变异资料为依据 ,基于广义电磁波与物质相互作用原理 ,分析了土壤理化特性变异对土壤介电常数、折射率、质量吸收系数等电磁特性参数的影响规律 ,得出了土壤介电常数的水分敏感性强而土壤的容重、质地影响小 。

Based on the theory of interaction between electromagnetic waves and materials, using the data of several typical soil physical and chemical properties, the variations of soil dielectric constant( ε s), complex refractive index( n s), mass absorption coefficient ( μ s) are analyzed, and the influence of the soil bulk density, physical and chemical property to electromagnetic measurement is studied. It is concluded that the complex dielectric constant ( ε s)is highly sensitive to soil moisture and less sensitive to soil physical and chemical properties, and the dielectric method is more adaptable and more precise for soil moisture content measurement than many other methods.