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DOI10.1016/j.agrformet.2019.04.004
A new thermal conductivity model for sandy and peat soils
Zhao, Ying1,2; Si, Bingcheng1,2; Zhang, Zhenhua1; Li, Min3; He, Hailong3; Hill, Robert Lee4
发表日期2019
ISSN0168-1923
EISSN1873-2240
卷号274页码:95-105
英文摘要

Soil thermal conductivity (lambda) is frequently required when studying coupled heat and water transfer in soils. While lambda models are widely available for mineral soil, they are not as readily available for organic soil, which plays an increasingly significant role in climate change and carbon sequestration. This study used a heat-pulse method to measure the thermal properties of six soil peat:mineral mixes spanning wide ranges of water contents and bulk densities. Based on this, a new generalized lambda model was proposed, which was tested by fitting the model to heat-pulse measurements, and then comparing with several other widely-used empirical or physically-based models of lambda. The new model accounts for the effects of porosity, degree of saturation, organic matter content and soil texture on the thermal conductivity. It is capable of describing the measured data more effectively than other models due to its simplicity and applicability, as indicated by the lowest values of root mean square error (0.028 W m(-1) K-1) and the highest value of Nash-Sutcliffe efficiency (0.995). The new model has shown potential for use in studying numerical algorithms for describing coupled heat and mass transfer processes in a variety of multiphase soils. It can also be incorporated into global land surface models, particularly in terms of identifying the significance of peat soils on climate change and carbon sequestration.


WOS研究方向Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
来源期刊AGRICULTURAL AND FOREST METEOROLOGY
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/101895
作者单位1.Ludong Univ, Coll Resources & Environm Engn, Yantai 264025, Peoples R China;
2.Univ Saskatchewan, Dept Soil Sci, Saskatoon, SK S7N 5A8, Canada;
3.Northwest A&F Univ, Inst Water Saving Agr Arid Areas China, Yangling 712100, Shaanxi, Peoples R China;
4.Univ Maryland, Dept Environm Sci & Technol, College Pk, MD 20742 USA
推荐引用方式
GB/T 7714
Zhao, Ying,Si, Bingcheng,Zhang, Zhenhua,et al. A new thermal conductivity model for sandy and peat soils[J],2019,274:95-105.
APA Zhao, Ying,Si, Bingcheng,Zhang, Zhenhua,Li, Min,He, Hailong,&Hill, Robert Lee.(2019).A new thermal conductivity model for sandy and peat soils.AGRICULTURAL AND FOREST METEOROLOGY,274,95-105.
MLA Zhao, Ying,et al."A new thermal conductivity model for sandy and peat soils".AGRICULTURAL AND FOREST METEOROLOGY 274(2019):95-105.
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