Źródła centralnej części dorzecza górnej Szreniawy – wydajność i zmiany cech fizykochemicznych w latach 2000–2011

Anna Banaś


Springs in the central part of the upper Szreniawa catchment – discharge and change of physicochemical
properties in 2000–2011..
A b s t r a c t. Spring water discharge and physicochemical properties were investigated in four springs of the Szreniawa catchment. The catchment is located in the western part of the Miechów Upland and is composed of Cretaceous marls and limestones. Spring discharge was measured in two-week intervals from February to November 2011. The water was being sampled for chemical composition once a month. The aim was to determine discharge changes in the springs and physicochemical properties of water. Relationships between the properties of water in the years 2000–2011 have been also analyzed. All the examined springs are characterized by a steady discharge. According to the Meinzer’s efficiency classification, most of the springs belong to class III. The total average spring discharge is about 496.4 dm3 · s–1. According to the Shchukarev–Priklonskii classification, these waters represent the HCO3–Ca type. The samples are characterized by a relatively high mineralization of water in most springs exceeding 500 mg · dm–3. The springs located nearby canbe very different in terms of chemical composition of water, which is controlled by the variations in aquifer rock lithology and local groundwater horizons. The total dissolved solids, concentrations of Ca2+ and HCO3 measured in 2011, were always higher than in 2000. It may indicate an increase in the aggressiveness of the water.

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