Changes in water chemistry after flowing from the spring
2006
Dubová, M., Slovak Academy of Sciences, Zvolen (Slovak Republic). Institute of Forest Ecology | Kundrík, F., Slovak Academy of Sciences, Zvolen (Slovak Republic). Institute of Forest Ecology
In this work we evaluate changes in chemical composition of water flowing out from its spring (I) and passing through a meadow ecosystem (II–VI). There are the quantitative changes in chemistry of water flowing from sampling sites (I) to (VI): potassium (68.5%), calcium (31%), magnesium (19%), sodium (16%), nitrogen (15%), electric conductivity (24%) and dissolved substances (5.2%) decrease. In opposite, sulphur (25.6%) and pH value (6.6%) increase. We study the influence of this water flow on the given ecosystem and compare the examined water with surface water in streams passing several other sites with similar geological substrate. Values of indicators in the studied samples confirm the nature of surface water. Calcium is the most abundant alkaline nutrient component (7.47 mg per l), followed by magnesium (3.63 mg per l) and potassium (1.92 mg per l). From airborne pollutants, there are present sulphates 31.46 mg per l, nitrates 10.07 mg per l and ammonium ions 0.03 mg per l. The pH value (water reaction) is 6.73, electric conductivity is 131.2 micro S per cm. The amount of dissolved substances is 128.3 mg per l, from which 50.4% are inorganic and 49.6% are organic. The value of sodium concentration is 6.05 mg per l. All the indicators, with exception of nitrates ranking the water to the II-nd quality class (clear water), classify it to the first quality class (very clear water). No significant differences were found comparing the examined water with water in other surface streams in the Protected Landscape Area (PLA) Poľana Mts and in the Kremnické vrchy Mts. The changes in water chemistry indicate a favourable influence on the meadow ecosystem – its stability or also the soil cover.
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