Forest hydrological measurements were carried out on Mount Rax in Austria, which is situated in the karstic water protection zone of the City of Vienna. Experimental sites were established and are operated since 1999 within the montane spruce-fir-beech belt, the subalpine dwarf pine belt and the subalpine spruce-fir belt. The aim of data collection was to identify and display differences between forest types within each of the investigated forest hydrotopes with regard to hydro-meteorological parameters. Within the montane zone, a mixed spruce-fir-beech stand, a homogeneous plantation-like Norway spruce stand and an unstocked regeneration area were compared. On the Rax plateau, a dwarf pine forest was compared with a subalpine pasture area, while within the subalpine spruce-fir forest area a naturally structured forest stand was compared with a forest stand, where a shelterwood cutting system had been applied. With regard to hydro-meteorological parameters, the forest types within each of the investigated forest hydrotopes differed on various levels. Analysis of the measured data from the experimental sites together with findings from published literature then formed the fundamentals for the deduction of silvicultural concepts with the aim of optimising the water protection functionality of the investigated forest stands. The already existing ban on clear-cutting was confirmed. For fulfilling a sustainable source water protection, forest management concepts which are based on the continuous cover forest system have to be favoured. Stability and vitality are of outstanding relevance for the forest stands within the water protection zone. Target conditions were developed for all examined forest hydrotopes. Integral source water protection actually gains relevance for human development. Silviculture with the aim of the optimisation of the drinking water protection functionality of forest stands can contribute to this purpose.