Abstract
A significant proportion of the global water supply is ensured by karst aquifers. However, these are often highly vulnerable to contamination. A storm water tank located in the rural karst catchment area of the Gallusquelle spring (Swabian Alb, southwest Germany) about 9.1 km away was identified as a potential source of contamination. A tracer experiment was carried out in order to evaluate this hydraulic connection. For this, 2.5 kg of the fluorescence dye sulforhodamine G was injected directly at the spillway location.
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