Thermal conductivity of mineral soils relates linearly to air-filled porosity
Thermal conductivity of mineral soils relates linearly to air-filled porosity
复制标题
矿土的导热系数与充气孔隙率呈线性关系
DOI：
10.1002/saj2.20016
复制
发表时间：
2020
影响因子：
2.9
通讯作者：
Horton Robert
中科院分区：
文献类型：
--
作者：
Xie Xiaoting;Lu Yili;Ren Tusheng;Horton Robert
土壤导热系数（λ）在很大程度上取决于土壤固体、空气和水的体积分数。以前的研究主要集中在开发饱和度或土壤含水量（θ）相关的λ模型。有报道称，λ与充气孔隙度（na）的相关性大于与θ的相关性，并且相关性受土壤固体的固体分数和λ的影响较小。在这项研究中，一个简单的线性关系λ和nai开发与新测量和公布的数据集。独立评估表明，估计值和测量值之间的一致性很好，均方根误差小于0.24 W m− 1 K −1，表明线性λ-na关系可以用来近似λ从na具有令人满意的精度。
Soil thermal conductivity (λ) depends largely on the volume fractions of soil solids, air and water. Previous studies focus mainly on developing saturation or soil water content (θ) dependent λ models. There are reports that λ is correlated more with air‐filled porosity (na) than with θ, and the correlation is less affected by solid fraction and λ of soil solids. In this study, a simple linear relationship between λ andnais developed with both newly measured and published datasets. Independent evaluations showed good agreement between estimated and measured λ values with root mean square errors less than 0.24 W m−1K−1, indicating that the linear λ‐narelationship could be used to approximate λ fromnawith satisfactory accuracy.