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| 利用热脉冲-时域反射技术测定土壤水热动态和物理参数 Ⅰ.原理 | |
| 引用本文： | 任图生,邵明安,巨兆强,HortonRobert.利用热脉冲-时域反射技术测定土壤水热动态和物理参数 Ⅰ.原理[J].土壤学报,2004,41(2):225-229. |
| 作者姓名： | 任图生 邵明安 巨兆强 HortonRobert |
| 作者单位： | 1. 中国科学院地理资源研究所陆地水循环及地表过程重点实验室,北京,100101 2. 中国农业大学土壤和水科学系,北京,100094 3. Depaprtment of Agronomy,Iowa State University,Ames,IA 50010,USA |
| 基金项目： | 中国科学院知识创新项目(KZCX2-411,U871)、国家自然科学基金项目(40025106)和河北省自然科学基金项目(300309)资助 |
| 摘 要： | 由于土壤特性的时空变异性 ,对土壤含水量、温度、热特性以及其它物理参数的动态监测是土壤学研究的重要课题。本文以热脉冲技术和时域反射技术的理论为基础 ,介绍了利用热脉冲技术 时域反射技术 (Thermo TDR)连续定位测定土壤含水量、电导率、温度和热特性的原理 ,并利用土壤热特性与容重和含水量的关系 ,导出了土壤容重、饱和度和通气孔度的计算公式。 |
| 关 键 词： | 热脉冲-时域反射 土壤物理性质 定位测定 |
| 收稿时间： | 2003/5/16 0:00:00 |
| 修稿时间： | 2003/11/5 0:00:00 |
MEASUREMENT OF SOIL PHYSICAL PROPERTIES WITH THERMO-TIME DOMAIN REFLECTOMETRY Ⅰ.THEORY |
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| Ren Tusheng,Shao Mingan,Ju Zhaoqiang and Horton Robert.MEASUREMENT OF SOIL PHYSICAL PROPERTIES WITH THERMO-TIME DOMAIN REFLECTOMETRY Ⅰ.THEORY[J].Acta Pedologica Sinica,2004,41(2):225-229. | |
| Authors: | Ren Tusheng Shao Mingan Ju Zhaoqiang and Horton Robert |
| Institution: | Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;Department of Soil and Water Sciences, China Agricultural University, Beijing 100094, China;Department of Agronomy, Iowa State University, Ames, IA 50010, USA |
| Abstract: | The spatial and temporal variability of soil properties limits the determination of soil physical parameters in situ and in a dynamic way.In this paper the technique of Thermo Time Domain Reflectometry (Thermo TDR) is introduced to make measurements of a wide range of soil physical properties.We outline the theories of TDR technique for water content and electrical conductivity measurement, and heat pulse technique for determination of volumetric heat capacity, thermal conductivity, and thermal diffusivity.Furthermore, the parameters of soil bulk density, air filled porosity, and degree of saturation are derived from the theoretical relationship between heat capacity, bulk density, and water content. |
| Keywords: | Thermo-TDR Soil physical property Measurement |
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