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Hydraulic processes and properties of partially hydrophobic soils: The effect of water repellency on the characteristic curves estimated from dynamic flow experiments

Diamantopoulos, Efstathios and Lamparter, Axel and Bachmann, Jörg and Durner, Wolfgang (2011) Hydraulic processes and properties of partially hydrophobic soils: The effect of water repellency on the characteristic curves estimated from dynamic flow experiments. In: Böden verstehen - Böden nutzen - Böden fit machen, 3. - 9. September 2011, Berlin.

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Abstract

Soil research done over the past decades, has proven that water repellent soils are widespread in all climates. In order to assess the effect of hydrophobicity in the estimated characteristic curves, inflow/outflow experiments were conducted in the laboratory for one soil and two artificial created hydrophobic mixtures. In the inflow/outflow experiments the pressure head at the bottom of the soil column was increased/decreased and the estimated curves were obtained by means of inverse modeling. Multistep 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 have shown that the water retention functions and the unsaturated hydraulic conductivity functions estimated from the dynamic experiments are strongly dependent on the degree of hydrophobicity and the wetting/drying process.

Item Type: Conference or Workshop Item (Contribution to "Reports of the DBG")
Uncontrolled Keywords: Water repellency, hydrophobicity, ethanol, Multistep Outflow Experiment, imbibition, drainage
Divisions: Kommissionen > Kommission I: Bodenphysik und Bodenhydrologie
Depositing User: Efstathios Diamantopoulos
Date Deposited: 01 Oct 2011 08:38
Last Modified: 13 Dec 2015 16:25
URI: http://eprints.dbges.de/id/eprint/589

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