Details
| Original language | English |
|---|---|
| Pages (from-to) | 175-186 |
| Number of pages | 12 |
| Journal | Journal of hydrology |
| Volume | 486 |
| Publication status | Published - 12 Apr 2013 |
Abstract
Soil research done over the past decades has proven that water repellent soils are widespread in all climates. Water repellency enhances the leaching of contaminants in the unsaturated zone by introducing preferential flow. In order to predict soil water fluxes in the unsaturated zone the accurate knowledge of the soil hydraulic properties (SHP) is mandatory. In this study the effect of water repellency on both imbibition and drainage SHP was studied. Inflow/outflow experiments were conducted in the laboratory for two soils and two artificially created hydrophobic mixtures. In the inflow/outflow experiments the pressure head at the bottom of the soil column was increased/decreased and the estimated SHP functions were obtained by means of inverse modeling. Inflow/outflow experiments were also conducted using ethanol instead of water in order to estimate the effect of liquid wetting properties on the estimated characteristic curves of the materials under study. The results showed that the water retention functions and the unsaturated hydraulic conductivity functions estimated from the dynamic experiments are strongly dependent on the degree of water repellency and the wetting/drying process.
Keywords
- Ethanol, Hydrophobicity, Inverse modeling, Soil hydraulic properties, Water repellency
ASJC Scopus subject areas
- Environmental Science(all)
- Water Science and Technology
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In: Journal of hydrology, Vol. 486, 12.04.2013, p. 175-186.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Effect of soil water repellency on soil hydraulic properties estimated under dynamic conditions
AU - Diamantopoulos, E.
AU - Durner, W.
AU - Reszkowska, A.
AU - Bachmann, J.
N1 - Copyright: Copyright 2013 Elsevier B.V., All rights reserved.
PY - 2013/4/12
Y1 - 2013/4/12
N2 - Soil research done over the past decades has proven that water repellent soils are widespread in all climates. Water repellency enhances the leaching of contaminants in the unsaturated zone by introducing preferential flow. In order to predict soil water fluxes in the unsaturated zone the accurate knowledge of the soil hydraulic properties (SHP) is mandatory. In this study the effect of water repellency on both imbibition and drainage SHP was studied. Inflow/outflow experiments were conducted in the laboratory for two soils and two artificially created hydrophobic mixtures. In the inflow/outflow experiments the pressure head at the bottom of the soil column was increased/decreased and the estimated SHP functions were obtained by means of inverse modeling. Inflow/outflow experiments were also conducted using ethanol instead of water in order to estimate the effect of liquid wetting properties on the estimated characteristic curves of the materials under study. The results showed that the water retention functions and the unsaturated hydraulic conductivity functions estimated from the dynamic experiments are strongly dependent on the degree of water repellency and the wetting/drying process.
AB - Soil research done over the past decades has proven that water repellent soils are widespread in all climates. Water repellency enhances the leaching of contaminants in the unsaturated zone by introducing preferential flow. In order to predict soil water fluxes in the unsaturated zone the accurate knowledge of the soil hydraulic properties (SHP) is mandatory. In this study the effect of water repellency on both imbibition and drainage SHP was studied. Inflow/outflow experiments were conducted in the laboratory for two soils and two artificially created hydrophobic mixtures. In the inflow/outflow experiments the pressure head at the bottom of the soil column was increased/decreased and the estimated SHP functions were obtained by means of inverse modeling. Inflow/outflow experiments were also conducted using ethanol instead of water in order to estimate the effect of liquid wetting properties on the estimated characteristic curves of the materials under study. The results showed that the water retention functions and the unsaturated hydraulic conductivity functions estimated from the dynamic experiments are strongly dependent on the degree of water repellency and the wetting/drying process.
KW - Ethanol
KW - Hydrophobicity
KW - Inverse modeling
KW - Soil hydraulic properties
KW - Water repellency
UR - http://www.scopus.com/inward/record.url?scp=84875512570&partnerID=8YFLogxK
U2 - 10.1016/j.jhydrol.2013.01.020
DO - 10.1016/j.jhydrol.2013.01.020
M3 - Article
AN - SCOPUS:84875512570
VL - 486
SP - 175
EP - 186
JO - Journal of hydrology
JF - Journal of hydrology
SN - 0022-1694
ER -