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3D infiltration dynamics in an initially dry sandy soil: interactive soil hydraulic-geophysical interpretation

Ganz, Christina and Noell, Ursula and Bachmann, Jörg and Lamparter, Axel and Duijnisveld, Wilhelmus .H.M. (2011) 3D infiltration dynamics in an initially dry sandy soil: interactive soil hydraulic-geophysical interpretation. In: Böden verstehen - Böden nutzen - Böden fit machen, 3. - 9. September 2011, Berlin.

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Abstract

To assess water transport dynamics in a poorly structured homogeneous sandy soil, labour-intensive TDR and tensiometer measurements were conducted during a double tracer ponding experiment. Water transport was also observed by 3D-ERT measurements. The excavated soil profile showed a cone-shaped infiltration zone with depth, contrary to an expected tracer pattern in sand. Water content changes showed highest water contents at the wetting front, referred to as saturation overshoot. This non-monotonic pattern is likely to have been caused by reduced wettability of the soil material, which reduces capillary forces during the infiltration. Independent ERT-data showed the same infiltration pattern during ponding, but could not detect the saturation profile due to gradient smoothing during the inversion process.

Item Type: Conference or Workshop Item (Contribution to "Reports of the DBG")
Uncontrolled Keywords: infiltration, saturation overshoot, tracer, wettability, ERT
Divisions: Kommissionen > Kommission I: Bodenphysik und Bodenhydrologie
Depositing User: Christina Ganz
Date Deposited: 18 Oct 2011 19:54
Last Modified: 13 Dec 2015 16:26
URI: http://eprints.dbges.de/id/eprint/699

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