Chemical variability of water and sediment over time and along a mountain river subjected to natural and human impact | Knowledge and Management of Aquatic Ecosystems

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Table 5

The significance of differences in the values of physicochemical parameters and concentrations of heavy metals in the water of the Biała Tarnowska River above and below the weir (Wilcoxon test). Only significant differences are given.

Barrier in:	Parametr	Z	p
Kąclowa	Mn	2.1	0.038
	HCO₃⁻	2.9	0.003
Grybów	Conductivity	2.8	0.005
	NH₄⁺	2.6	0.010
	Na⁺	2.2	0.028
	K⁺	2.4	0.017
Ciężkowice	pH	2.2	0.025
	SO₄²⁻	2.2	0.026
Pleśna	Cd	2.0	0.050
	Pb	2.2	0.026
	PO₄³⁻	2.1	0.033

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