Role of the pore-size distribution function on water flow in unsaturated soil
The hydraulic properties of soil (i.e. soil-water characteristic curve (SWCC) and coefficient of permeability) govern the moisture flow in it. Previous research has indicated that the hydraulic properties of soil are dependent on its pore-size distribution. An improved capillary model is now propose...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2020
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| Online Access: | https://hdl.handle.net/10356/144384 |
| _version_ | 1824453666988359680 |
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| author | Zhai, Qian Rahardjo, Harianto Satyanaga, Alfrendo Priono Dai, Guo-liang |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Zhai, Qian Rahardjo, Harianto Satyanaga, Alfrendo Priono Dai, Guo-liang |
| author_sort | Zhai, Qian |
| collection | NTU |
| description | The hydraulic properties of soil (i.e. soil-water characteristic curve (SWCC) and coefficient of permeability) govern the moisture flow in it. Previous research has indicated that the hydraulic properties of soil are dependent on its pore-size distribution. An improved capillary model is now proposed to explain the concept of the pore-size distribution in soil and its relationship to SWCC. A new model, the “valve model”, is also proposed as the explanation for water flow in unsaturated soil. The pore-size distribution function is incorporated in the “valve model” and is used to calculate the relative coefficient of permeability for unsaturated soil. In this paper, the role of the pore-size distribution function in the estimation of SWCC and the permeability function are explained. Equations are proposed for estimating the pore-size distribution function from the experimental data of relative coefficient of permeability. The results from the proposed equations agree with the experimental data from laboratory measurement and published data. |
| first_indexed | 2025-02-19T03:10:03Z |
| format | Journal Article |
| id | ntu-10356/144384 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:10:03Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1443842020-11-03T00:47:25Z Role of the pore-size distribution function on water flow in unsaturated soil Zhai, Qian Rahardjo, Harianto Satyanaga, Alfrendo Priono Dai, Guo-liang School of Civil and Environmental Engineering Engineering::Civil engineering Soil-water Characteristic Curve (SWCC) Hydraulic Properties The hydraulic properties of soil (i.e. soil-water characteristic curve (SWCC) and coefficient of permeability) govern the moisture flow in it. Previous research has indicated that the hydraulic properties of soil are dependent on its pore-size distribution. An improved capillary model is now proposed to explain the concept of the pore-size distribution in soil and its relationship to SWCC. A new model, the “valve model”, is also proposed as the explanation for water flow in unsaturated soil. The pore-size distribution function is incorporated in the “valve model” and is used to calculate the relative coefficient of permeability for unsaturated soil. In this paper, the role of the pore-size distribution function in the estimation of SWCC and the permeability function are explained. Equations are proposed for estimating the pore-size distribution function from the experimental data of relative coefficient of permeability. The results from the proposed equations agree with the experimental data from laboratory measurement and published data. Accepted version Project supported by the National Natural Science Foundation of China (No. 51878160), the National Key Research and Development Program of China (No. 2017YFC00703408), and the Fundamental Research Funds for the Central Universities (No. 2242018K41046), China. 2020-11-03T00:47:25Z 2020-11-03T00:47:25Z 2018 Journal Article Zhai, Q., Rahardjo, H., Satyanaga, A., Priono, & Dai, G.-l. (2019). Role of the pore-size distribution function on water flow in unsaturated soil. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 20(1), 10-20. doi:10.1631/jzus.A1800347 1673-565X https://hdl.handle.net/10356/144384 10.1631/jzus.A1800347 1 20 10 20 en Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering) © 2019 Zhejiang University and Springer-Verlag. All rights reserved. This paper was published by Springer Nature in Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering) and is made available with permission of Zhejiang University and Springer-Verlag. application/pdf |
| spellingShingle | Engineering::Civil engineering Soil-water Characteristic Curve (SWCC) Hydraulic Properties Zhai, Qian Rahardjo, Harianto Satyanaga, Alfrendo Priono Dai, Guo-liang Role of the pore-size distribution function on water flow in unsaturated soil |
| title | Role of the pore-size distribution function on water flow in unsaturated soil |
| title_full | Role of the pore-size distribution function on water flow in unsaturated soil |
| title_fullStr | Role of the pore-size distribution function on water flow in unsaturated soil |
| title_full_unstemmed | Role of the pore-size distribution function on water flow in unsaturated soil |
| title_short | Role of the pore-size distribution function on water flow in unsaturated soil |
| title_sort | role of the pore size distribution function on water flow in unsaturated soil |
| topic | Engineering::Civil engineering Soil-water Characteristic Curve (SWCC) Hydraulic Properties |
| url | https://hdl.handle.net/10356/144384 |
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