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Stromflow component determination using hydrological, isotopic and chemical approaches in the small forested strengbach catchment (granitic Vosges Massif, France)

Viville, Daniel and Probst, Anne and Ladouche, Bernard and Idir, Samir and Probst, Jean-Luc and Bariac, Thierry Stromflow component determination using hydrological, isotopic and chemical approaches in the small forested strengbach catchment (granitic Vosges Massif, France). (2003) In: 9th Conference of the European Network of Experimental and Representative Basins (ERB) , 25 – 28 September 2002, Demänovská dolina, Slovakia .

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Abstract

The hydrological behaviour Of the small (0.8 km2)granitic Strengbach catchment (Vosges mountains, Eastern France)was investigated during an intensive summer rainfall event (30mm) by hydrological, isotopic and chemical measurements of streamflow components. [puissance]18 O, Si, DOC were selected to asses the different contributing sources using mass balance equations and end-member mixing diagrams. Gauging indicates that most of the water (62%) com from the lower part of the catchment. Isotopic hydrograph separation indicates that the pre-event water dominates (78% of the total runoff), even at peak flow (55% of the discharge). The chemical separation distinguishes the contribution of water coming from the deep layers of the hillslopes (55-64%)from that coming from the upper layers of the downslope saturated area (45-36%). Peak flow is mainly produced by the superficial layers of the saturated areas ; processes involved could be the superficial runoff due to groundwater exfiltration after rapid infiltration.

Item Type:Conference or Workshop Item (Paper)
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS
French research institutions > Institut National de la Recherche Agronomique - INRA
French research institutions > Institut de Recherche pour le Développement - IRD
Other partners > Université Louis Pasteur-Strasbourg I - ULP (FRANCE)
Other partners > Université Pierre et Marie Curie, Paris 6 - UPMC (FRANCE)
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Bureau de recherches géologiques et minières - BRGM
Laboratory name:
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Deposited By: Leila Abdelouhab

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