What is the impact of entrapped air on the measurement of saturated hydraulic conductivity of soil?
X-ray computed tomography was applied to investigate the influence of entrapped air on standard laboratory measurements of saturated hydraulic conductivity Ks in five soil samples. The investigation consisted of five X-ray scans for each sample. Soil samples were saturated by the standard laborato...
| Main Author: | |
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| Format: | H2 |
| Language: | Inglés |
| Published: |
SLU/Dept. of Soil and Environment
2016
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| Subjects: |
| _version_ | 1855571484041281536 |
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| author | Babko, Maryia |
| author_browse | Babko, Maryia |
| author_facet | Babko, Maryia |
| author_sort | Babko, Maryia |
| collection | Epsilon Archive for Student Projects |
| description | X-ray computed tomography was applied to investigate the influence of entrapped air on standard
laboratory measurements of saturated hydraulic conductivity Ks in five soil samples. The investigation
consisted of five X-ray scans for each sample. Soil samples were saturated by the standard laboratory
method from the bottom at the first step. To attain full saturation and explore the difference of
entrapped air content on the standard laboratory measurements, a vacuum chamber was used to
remove the entrapped air from the initially unsaturated soils and then the samples were again saturated
from the bottom. To measure Ks, a measurement device that is based on a constant-head principle was
applied. The results showed that the volume of entrapped air greatly depends on how the soil was
saturated. Furthermore, the saturated hydraulic conductivity and the entrapped air content were
negatively correlated with a strong Pearson correlation coefficient (rb = -0.6). Thus, not considering
the existence of entrapped air leads to errors in estimating Ks values. |
| format | H2 |
| id | RepoSLU9233 |
| institution | Swedish University of Agricultural Sciences |
| language | Inglés |
| publishDate | 2016 |
| publishDateSort | 2016 |
| publisher | SLU/Dept. of Soil and Environment |
| publisherStr | SLU/Dept. of Soil and Environment |
| record_format | eprints |
| spelling | RepoSLU92332016-07-08T11:54:46Z What is the impact of entrapped air on the measurement of saturated hydraulic conductivity of soil? Babko, Maryia air bubbles vacuum saturation X-ray computed tomography the constant-head method of Ks measurement standard laboratory method of saturation critical pore diameter X-ray computed tomography was applied to investigate the influence of entrapped air on standard laboratory measurements of saturated hydraulic conductivity Ks in five soil samples. The investigation consisted of five X-ray scans for each sample. Soil samples were saturated by the standard laboratory method from the bottom at the first step. To attain full saturation and explore the difference of entrapped air content on the standard laboratory measurements, a vacuum chamber was used to remove the entrapped air from the initially unsaturated soils and then the samples were again saturated from the bottom. To measure Ks, a measurement device that is based on a constant-head principle was applied. The results showed that the volume of entrapped air greatly depends on how the soil was saturated. Furthermore, the saturated hydraulic conductivity and the entrapped air content were negatively correlated with a strong Pearson correlation coefficient (rb = -0.6). Thus, not considering the existence of entrapped air leads to errors in estimating Ks values. SLU/Dept. of Soil and Environment 2016 H2 eng https://stud.epsilon.slu.se/9233/ |
| spellingShingle | air bubbles vacuum saturation X-ray computed tomography the constant-head method of Ks measurement standard laboratory method of saturation critical pore diameter Babko, Maryia What is the impact of entrapped air on the measurement of saturated hydraulic conductivity of soil? |
| title | What is the impact of entrapped air on the measurement of saturated hydraulic conductivity of soil? |
| title_full | What is the impact of entrapped air on the measurement of saturated hydraulic conductivity of soil? |
| title_fullStr | What is the impact of entrapped air on the measurement of saturated hydraulic conductivity of soil? |
| title_full_unstemmed | What is the impact of entrapped air on the measurement of saturated hydraulic conductivity of soil? |
| title_short | What is the impact of entrapped air on the measurement of saturated hydraulic conductivity of soil? |
| title_sort | what is the impact of entrapped air on the measurement of saturated hydraulic conductivity of soil? |
| topic | air bubbles vacuum saturation X-ray computed tomography the constant-head method of Ks measurement standard laboratory method of saturation critical pore diameter |