ABSTRACT
The Czech-German catchment-cluster PA S umava consists of Region Upper Regen (head-
waters of the river Schwarzer Regen) and the Nature Park Sumava (Region
Sumava, figure 1).
It is drained by the rivers Vltava and Otava, on the Czech side and the river Schwarzer Regen on the German side, which belongs to the Danube stream catchment. Due to the European watershed crossing the German-Czech border region there exist only subordinate cross border surface water catchments, but transboundary groundwater catchments must be supposed. Geological units mainly consist of hard rocks, namely paragneisses and granites, which both generally show a very low permeability. Nevertheless, locally parts with increased
hydraulic conductivity can be found, such as the transition zones between lithological units, intensively stressed tectonic zones and former circulation paths. Due to these environmental conditions all management aspects have to focus on scaling effects of indicators as well as varying range of representativeness of information (Bender et al., 2004a).
