Estimation of air permeability function from soil-water characteristic curve
The multiphase flow (including liquid flow and air flow) in unsaturated soil is related to many engineering problems such as contaminant transport, rainwater infiltration, and soil-water evaporation. It is proven that water flow in unsaturated soil can be estimated using the concept of the pore-size...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2021
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/146753 |
| _version_ | 1826118600315895808 |
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| author | Zhai, Qian Rahardjo, Harianto Satyanaga, Alfrendo |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Zhai, Qian Rahardjo, Harianto Satyanaga, Alfrendo |
| author_sort | Zhai, Qian |
| collection | NTU |
| description | The multiphase flow (including liquid flow and air flow) in unsaturated soil is related to many engineering problems such as contaminant transport, rainwater infiltration, and soil-water evaporation. It is proven that water flow in unsaturated soil can be estimated using the concept of the pore-size distribution function. Many models have been proposed to estimate the water flow or water permeability function, kw, from the soil-water characteristic curve (SWCC). On the other hand, a limited model has been proposed to estimate the air flow or air permeability function, ka, from the SWCC. Most of the models used for the estimation of the air permeability functions are empirical, and they are dependent on the empirical parameters. In this paper, the relative air coefficient of permeability was estimated using the concept of the pore-size distribution function. In the method proposed in this paper, no empirical parameters were adopted, and the estimation results purely depended on the soil-water characteristic curve. The proposed method was verified against experimental data from published literature. |
| first_indexed | 2024-10-01T04:46:09Z |
| format | Journal Article |
| id | ntu-10356/146753 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:46:09Z |
| publishDate | 2021 |
| record_format | dspace |
| spelling | ntu-10356/1467532021-03-09T07:43:13Z Estimation of air permeability function from soil-water characteristic curve Zhai, Qian Rahardjo, Harianto Satyanaga, Alfrendo School of Civil and Environmental Engineering Engineering::Civil engineering Soil-water Characteristic Curve Pore-size Distribution Function The multiphase flow (including liquid flow and air flow) in unsaturated soil is related to many engineering problems such as contaminant transport, rainwater infiltration, and soil-water evaporation. It is proven that water flow in unsaturated soil can be estimated using the concept of the pore-size distribution function. Many models have been proposed to estimate the water flow or water permeability function, kw, from the soil-water characteristic curve (SWCC). On the other hand, a limited model has been proposed to estimate the air flow or air permeability function, ka, from the SWCC. Most of the models used for the estimation of the air permeability functions are empirical, and they are dependent on the empirical parameters. In this paper, the relative air coefficient of permeability was estimated using the concept of the pore-size distribution function. In the method proposed in this paper, no empirical parameters were adopted, and the estimation results purely depended on the soil-water characteristic curve. The proposed method was verified against experimental data from published literature. Accepted version 2021-03-09T07:43:13Z 2021-03-09T07:43:13Z 2019 Journal Article Zhai, Q., Rahardjo, H., & Satyanaga, A. (2019). Estimation of air permeability function from soil-water characteristic curve. Canadian Geotechnical Journal, 56(4), 505-513. doi:10.1139/cgj-2017-0579 0008-3674 https://hdl.handle.net/10356/146753 10.1139/cgj-2017-0579 2-s2.0-85062067834 4 56 505 513 en Canadian Geotechnical Journal © 2019 Canadian Science Publishing. All rights reserved. This paper was published in Canadian Geotechnical Journal and is made available with permission of Canadian Science Publishing. application/pdf |
| spellingShingle | Engineering::Civil engineering Soil-water Characteristic Curve Pore-size Distribution Function Zhai, Qian Rahardjo, Harianto Satyanaga, Alfrendo Estimation of air permeability function from soil-water characteristic curve |
| title | Estimation of air permeability function from soil-water characteristic curve |
| title_full | Estimation of air permeability function from soil-water characteristic curve |
| title_fullStr | Estimation of air permeability function from soil-water characteristic curve |
| title_full_unstemmed | Estimation of air permeability function from soil-water characteristic curve |
| title_short | Estimation of air permeability function from soil-water characteristic curve |
| title_sort | estimation of air permeability function from soil water characteristic curve |
| topic | Engineering::Civil engineering Soil-water Characteristic Curve Pore-size Distribution Function |
| url | https://hdl.handle.net/10356/146753 |
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