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准确快速测定土壤含水率,在理论研究与实际应用中都具有重要意义。在综合分析烘干法、中子法、时域反射法和遥感4种土壤含水率测定方法的优缺点基础上,指出探地雷达是一种适合于中尺度的土壤含水率测定的技术。对探地雷达以及探地雷达测定土壤含水率的技术原理与方法进行全面介绍,并以介电常数与土壤含水率的关系模型为主,对国内外这方面的研究工作以及存在的问题进行了总结。最后指出,探地雷达测定土壤含水率是一项非常有前景的技术,但目前国内在这方面的研究工作与国外相比远远不够,今后应加强这方面的研究工作。
Accurate and rapid determination of soil moisture content, both in theoretical research and practical application of great significance. Based on the comprehensive analysis of the advantages and disadvantages of four drying methods, the neutron method, the time domain reflection method and the remote sensing method, it is pointed out that GPR is a suitable technology for the determination of soil moisture content at mesoscale. This paper introduces the technical principle and method of GPR and ground penetrating radar to determine the soil water content. Based on the model of the relationship between the dielectric constant and the soil moisture content, the research work and existing problems in this field both at home and abroad to sum up. Finally, it is pointed out that the determination of soil water content by GPR is a very promising technology. However, at present, the research work in this field in China is far from enough in foreign countries and research work in this area should be strengthened in the future.