Bayreuther Institut für Terrestrische Ökosystemforschung
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Investigations of Sulfur Dynamics in the Aquifer


From 01/1995 to 12/1997

Principal Investigator: Gunnar Lischeid
Staff: Michael Hauhs, Andreas Kolb
Grant: 0339476 B Vorhersage und Erklärung des Verhaltens und der Belastbarkeit von Ökosystemen unter veränderten Umweltbedingungen

In 1995, the setup for the hydrological long term routine programs was completed at the Lehstenbach catchment (Fichtelgebirge) and Steinkreuz/ Erlensumpf (Steigerwald). These measurements, as far as performed by the Department of Hydrogeology, now comprise meteorological measurements, including precipitation and throughfall analysis (Steigerwald), soil matrix potential and soil water content determination, groundwater analysis (Waldstein) and runoff measurement, including water analysis (Steigerwald). Additionally, a steady state tracer experiment was performed in cooperation with the Department of Ecological Modelling at the roofed catchment Gårdsjön G1 (Sweden). Here, the runoff generation process has been studied in detail. The data set allows to parametrize hydrological and hydrochemical models run at . Time series of sulfate and dissolved organic carbon in the Lehstenbach runoff were analysed by applying an artificial neural network. It turned out that discharge and short term discharge history alone accounted for 80% of the variance of concentration over time. This is a further step towards identification of the relevant processes at the catchment scale.

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