Search for: [Abstract = "Presented paper contain difference in chosen physic\-chemical water parameters between inflow \(Potok Dupniański \- forest catchment\) and outflow \(Olza river \- agricultural and urban carchment\). The stream water quality, beside the snow melting period is higher. The main and determining element for water classifies is their reaction. Waters from Olza river are of pure quality, which is the effect of the inorganic nitric form."]

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