Climate Change Data Portal
| DOI | 10.1016/j.jhydrol.2021.126838 |
| A new integral model for predicting the hydraulic conductivity of saturated frozen soil | |
| Zhang, Xiyan; Li, Dongqing; Chen, Lei; Ming, Feng; Liu, Yuhang | |
| 通讯作者 | Ming, F (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China. |
| 发表日期 | 2021 |
| ISSN | 0022-1694 |
| EISSN | 1879-2707 |
| 卷号 | 603 |
| 英文摘要 | Hydraulic conductivity of frozen soil is indispensable for describing water flow process in freezing soils. However, this conductivity is difficult to measure in the laboratory. So, the objective of this study is to propose a simple and smooth hydraulic conductivity model for saturated frozen soil based on the soil freezing characteristic curve (SFCC). Considering that the volume of pore water approximately represents the pore volume, the distribution of effective pore radii changed as a function of temperature was determined by combining the SFCC and the Gibbs-Thomson equation. Based on the distribution of effective pore radii, Hagen-Poiseuille equation, Darcy's law, relative hydraulic conductivity and tortuosity, a simple and smooth hydraulic conductivity model for saturated frozen soil based on the SFCC was proposed. To illustrate the model performance, eight existing experimental cases were analyzed. The results showed that predictions considering the three different tortuosity formulations were in good agreement with the tested data; the results were worse when not considering the tortuosity and the results were best when considering the tortuosity tau(F) = (B/r(b))(2). Moreover, the predictive modeling power was related to the tortuosity function. Furthermore, the model was further compared with the previous models, the results of which showed the better performance of the proposed model. The model is quite simple and timesaving to use when the SFCC and the saturated hydraulic conductivity are available. This result provides a new idea for developing the hydraulic conductivity model of saturated frozen soil. |
| 关键词 | MASS-TRANSFERFROST HEAVEICEMOISTUREEQUATION |
| 英文关键词 | Saturated frozen soil; Unsaturated unfrozen soil; Hydraulic conductivity; Soil freezing characteristic curve |
| 语种 | 英语 |
| WOS研究方向 | Engineering ; Geology ; Water Resources |
| WOS类目 | Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources |
| WOS记录号 | WOS:000706313000025 |
| 来源期刊 | JOURNAL OF HYDROLOGY
 |
| 来源机构 | 中国科学院西北生态环境资源研究院 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/253645 |
| 作者单位 | [Zhang, Xiyan; Li, Dongqing; Chen, Lei; Ming, Feng; Liu, Yuhang] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China; [Zhang, Xiyan; Chen, Lei; Liu, Yuhang] Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Xiyan,Li, Dongqing,Chen, Lei,et al. A new integral model for predicting the hydraulic conductivity of saturated frozen soil[J]. 中国科学院西北生态环境资源研究院,2021,603. |
| APA | Zhang, Xiyan,Li, Dongqing,Chen, Lei,Ming, Feng,&Liu, Yuhang.(2021).A new integral model for predicting the hydraulic conductivity of saturated frozen soil.JOURNAL OF HYDROLOGY,603. |
| MLA | Zhang, Xiyan,et al."A new integral model for predicting the hydraulic conductivity of saturated frozen soil".JOURNAL OF HYDROLOGY 603(2021). |
| 条目包含的文件 | 条目无相关文件。 | |||||
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
