Effect of surface soils with different hydrophobicities on infiltration

Soil hydrophobicity has been frequently investigated as it occurred naturally and can be used to stabilize the soil below or prevent contamination. In this research, the effect of varying degree of soil hydrophobicity was studied to observe its effect on the rate of infiltration. An infiltration col...

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Main Author: Lim, Ye Xun
Other Authors: Leong Eng Choon
Format: Final Year Project
Language:English
Published: Nanyang Technological University 2021
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Online Access:https://hdl.handle.net/10356/150524
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1505242021-06-16T09:37:57Z Effect of surface soils with different hydrophobicities on infiltration Lim, Ye Xun Leong Eng Choon School of Civil and Environmental Engineering CECLEONG@ntu.edu.sg Engineering::Civil engineering Soil hydrophobicity has been frequently investigated as it occurred naturally and can be used to stabilize the soil below or prevent contamination. In this research, the effect of varying degree of soil hydrophobicity was studied to observe its effect on the rate of infiltration. An infiltration column experiment was conducted with fine sand and fine sand with different degree of hydrophobicity overlying coarse sand. The pressure head on top of the fine sand was kept at 2 cm for all tests. The measured results of pore-water pressure and volumetric water content were compared to the simulated results of Hydrus 1-D. The experimental results shows that the use of a hydrophobic fine sand mixture decreases the rate of infiltration, and a higher degree of hydrophobicity results in a slower infiltration into the underlying coarse sand. Hydrus 1-D performed well in simulating the experimental results. Sensitivity tests performed showed that Hydrus 1-D gave a better match to the experimental results when the SWCC parameters of the wetting curve of the fine sand were used as compared to the drying curve obtained from Tempe cell test. The saturated hydraulic conductivity was also found to have a big influence on the pore-water pressure as compared to the volumetric water content. Bachelor of Engineering (Civil) 2021-06-16T09:37:57Z 2021-06-16T09:37:57Z 2021 Final Year Project (FYP) Lim, Y. X. (2021). Effect of surface soils with different hydrophobicities on infiltration. Final Year Project (FYP), Nanyang Technological University, Singapore. https://hdl.handle.net/10356/150524 https://hdl.handle.net/10356/150524 en GE-12 application/pdf Nanyang Technological University
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Civil engineering
spellingShingle Engineering::Civil engineering
Lim, Ye Xun
Effect of surface soils with different hydrophobicities on infiltration
description Soil hydrophobicity has been frequently investigated as it occurred naturally and can be used to stabilize the soil below or prevent contamination. In this research, the effect of varying degree of soil hydrophobicity was studied to observe its effect on the rate of infiltration. An infiltration column experiment was conducted with fine sand and fine sand with different degree of hydrophobicity overlying coarse sand. The pressure head on top of the fine sand was kept at 2 cm for all tests. The measured results of pore-water pressure and volumetric water content were compared to the simulated results of Hydrus 1-D. The experimental results shows that the use of a hydrophobic fine sand mixture decreases the rate of infiltration, and a higher degree of hydrophobicity results in a slower infiltration into the underlying coarse sand. Hydrus 1-D performed well in simulating the experimental results. Sensitivity tests performed showed that Hydrus 1-D gave a better match to the experimental results when the SWCC parameters of the wetting curve of the fine sand were used as compared to the drying curve obtained from Tempe cell test. The saturated hydraulic conductivity was also found to have a big influence on the pore-water pressure as compared to the volumetric water content.
author2 Leong Eng Choon
author_facet Leong Eng Choon
Lim, Ye Xun
format Final Year Project
author Lim, Ye Xun
author_sort Lim, Ye Xun
title Effect of surface soils with different hydrophobicities on infiltration
title_short Effect of surface soils with different hydrophobicities on infiltration
title_full Effect of surface soils with different hydrophobicities on infiltration
title_fullStr Effect of surface soils with different hydrophobicities on infiltration
title_full_unstemmed Effect of surface soils with different hydrophobicities on infiltration
title_sort effect of surface soils with different hydrophobicities on infiltration
publisher Nanyang Technological University
publishDate 2021
url https://hdl.handle.net/10356/150524
_version_ 1703971162933952512