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URN: urn:nbn:de:kobv:517-opus-45246
URL: http://opus.kobv.de/ubp/volltexte/2010/4524/


Wienhöfer, Jan ; Germer, Kai ; Lindenmaier, Falk ; Färber, Arne ; Zehe, Erwin

Applied tracers for the observation of subsurface stormflow at the hillslope scale

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Kurzfassung in Englisch

Rain fall-runoff response in temperate humid headwater catchments is mainly controlled by hydrolo gical processes at the hillslope scale. Applied tracer experiments with fluore scent dye and salt tracers are well known tools in groundwater studies at the large scale and vadose zone studies at the plot scale, where they provide a means to characterise subsurface flow. We extend this approach to the hillslope scale to investigate saturated and unsaturated flow path s concertedly at a forested hill slope in the Austrian Alps. Dye staining experiments at the plot scale revealed that crack s and soil pipe s function as preferential flow path s in the fine-textured soils of the study area, and these preferenti al flow structures were active in fast subsurface transport of tracers at the hillslope scale. Breakthrough curves obtained under steady flow conditions could be fitted well to a one-dimensional convection-dispersion model. Under natural rain fall a positive correlation of tracer concentrations to the transient flows was observed. The results of this study demon strate qualitative and quantitative effects of preferential flow feature s on subsurface stormflow in a temperate humid headwater catchment. It turn s out that , at the hill slope scale, the interaction s of structures and processes are intrinsically complex, which implies that attempts to model such a hillslope satisfactorily require detailed investigation s of effective structures and parameters at the scale of interest.

Freie Schlagwörter (Englisch): Saturated hydraulic conductivity , preferential flow pathways , solute transport , runoff generation , fluorescent dyes
Institut: Institut für Geoökologie
DDC-Sachgruppe: Geowissenschaften
Dokumentart: c Postprint
Schriftenreihe: Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe, ISSN 1866-8372
Bandnummer: paper 146
Quelle: Hydrology and earth system sciences 13 (2009), 7, S. 1145 - 1161
Sprache: Englisch
Erstellungsjahr: 2009
Publikationsdatum: 21.07.2010
Bemerkung:
The article was originally published by Copernicus Publications:
Hydrology and Earth System Sciences. - 13 (2009), 7, S. 1145-1161
ISSN 1027-5606
Lizenz: Dieses Werk ist unter einer Creative Commons-Lizenz lizenziert.
Lizenz-Logo  Creative Commons - Attribution 3.0 unported


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