Zmienność cech fizycznych i chemicznych wód źródlanych w zlewni Zagórzańskiego Potoku (Pogórze Spisko-Gubałowskie)

Variability of physical and chemical properties of spring water in the Zagórzański Stream 69: A b s tr a c t. The aim of the paper is to examine the variability ofphysical and chemical characteristics of two springs located in the Zagórzański Stream catchment (Spisko-Gubalowskie Foothills, Podhale region). Cal­ careous tufa occurs at one of the investigated springs. Field studies were conducted once a month from 25th March 2017 to 28thFebruary 2018. Water Z Nieckarz o f the studied springs represents the bicarbonate-calcium-magnesium type during almost the whole year. The chemical composition of both springs is characterized by seasonal variability. The highest concentrations o f most ions occurred in the summer, when the rainfall was the lowest and during winter drought; while the lowest concentration - in the period of increased rainfall. The variability ofphysical and chemical parame­ ters of the spring with tufa is smaller than the other one. The spring with calcareous tufa stands out by the higher concentration ofMg2+ and SO42- and the presence of radon. The unique landscape values of the surroundings and hydrogeochemicalfeatures of the spring with calcareous tufa favour this place as an interesting hydro-tourism attraction in the Bukowina Tatrzańska region.