Effects of temperature changes on soil hydraulic properties
文献类型：SCI/SSCI论文
| 作者 | Gao H. B.; Shao, M. G. |
| 发表日期 | 2015 |
| 关键词 | Soil temperature Soil-water characteristic curve Hydraulic conductivity Clay water-retention curves capillary-pressure unsaturated soils dependence conductivity clay equation |
| 英文摘要 | Accurate simulation of the effects of temperature on soil water movement processes is lacking in the study of hydrothermal interactions in soil systems. Previous research has proposed some likely mechanisms (e.g., surface tension-viscous flow) to explain soil hydraulic properties in relation to temperature, but little research has focused on the temperature dependence of soil particles (e.g., thermal expansion). Using simulation analyses and experimental data, the effect of temperature on soil hydraulic properties was explored focusing on the thermal effect of water surficial properties and soil particle characteristics. Two temperature coefficients, lambda, representing the thermal effect of water surficial properties and c, representing the thermal effect of soil particle characteristics are introduced into soil hydraulics formulae to represent temperature dependence. Results show that temperature-dependent changes in water surficial properties including kinematics viscosity, surface tension and water density effects on soil hydraulic properties. Changes in temperature also affect soil particles, soil porosity and the interactive surface between liquid and solid, especially in heavy loam with high clay content. Expected soil hydraulic properties were calculated at three temperatures in two soil types and then compared to corresponding experimental results. Comparison of predicted and experimental soil hydraulic properties revealed overall similarities with a few exceptions. This study represents an initial simulation study of the effects of temperature on soil hydraulic properties. (C) 2015 Published by Elsevier B.V. |
| 出处 | Soil & Tillage Research |
| 卷 | 153 |
| 页 | 145-154 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0167-1987 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/38621]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Gao H. B.,Shao, M. G.. Effects of temperature changes on soil hydraulic properties. 2015. |
入库方式： OAI收割
来源：地理科学与资源研究所
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