SEASONAL CHANGEABILITY OF WATER FEATURES FROM WATERSHEDS WITH ARTIFICIAL NORWAY SPRUCE STANDS IN THE SILESIAN BESKID

摘要

The investigation was conducted in the forest area of the Silesian Beskid, which belongs to Polish part of the West Carpathians. This part of the Carpathians is strongly influenced by air pollutants transported from Upper Silesian and Ostrava industrial regions therefore artificial spruce stands situated in this area have been under multifactor stress for many decades. There are three watersheds with dominating artificial spruce stands situated at different altitudes, differing in site and health conditions: Brenna (650-750 m a.s.l. moderate), Istebna (550-840 m a.s.l. good), Kamesznica (720-1214 m a.s.l. disastrous failures). In this paper results of seasonal changeability of pH, conductivity and concentrations of: SO42-, Na+, KCa2Mg2+ in bulk precipitation, throughfall, stemflow and in outflow from watersheds for the period of April 2002-May 2003 are presented. The obtained results showed differences in water features among the watersheds as well as different dynamics of seasonal changeability in the analyzed water types. Effect of artificial spruce stands on the characteristics of the analyzed water is discussed.