期刊
EUROPEAN JOURNAL OF SOIL SCIENCE
卷 69, 期 5, 页码 947-952出版社
WILEY
DOI: 10.1111/ejss.12690
关键词
soil heat capacity; soil thermal conductivity; critical water content; model
类别
资金
- National Natural Science Foundation of China [41671223]
- National Key Technology Research and Development Program of China [2015CB150403]
- China Postdoctoral Science Foundation [2016M600148]
- U.S. Army Research Office [W911NF1610287]
- U.S. National Science Foundation [1623806]
- USDA-NIFA Multi-State Project [3188]
- Directorate For Geosciences
- Division Of Earth Sciences [1623806] Funding Source: National Science Foundation
- U.S. Department of Defense (DOD) [W911NF1610287] Funding Source: U.S. Department of Defense (DOD)
Soil bulk density ((b)) and volumetric water content () determine the volume fractions of soil solids, water and air, and influence mass and energy transfer in soil. It is desirable to monitor (b) and concurrently and non-destructively. We present a heat pulse-based method for simultaneous determination of (b) and from soil thermal properties. The method uses equations that relate (b) and to soil volumetric heat capacity (C) and to soil thermal conductivity (). We developed a three-step procedure to calculate (b) and from C and measured by a heat pulse sensor, with soil texture and specific heat of soil solids known a priori. Laboratory evaluation of soil samples with various textures showed that the three-step method provided reliable estimates of (b) and at values greater than the critical water content ((c)) when started to respond notably to increases in . This method provides a new way to determine (b) and simultaneously with heat pulse sensors. Highlights We developed an approach to determine soil bulk density (.. b) and water content (..) simultaneously with a heat pulse sensor. We estimated.. b and.. from soil thermal properties based on heat capacity and thermal conductivity models. The new approach provided reliable.. b and.. values at water contents >.. c, the critical value. At.. <.. c, the approach gave unstable results because soil thermal conductivity was insensitive to.. b.
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