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(magnesium, groundwater, distribution, Mg/Ca ratio, Serbia)
ground in which the groundwater isformed, as well as the type of groundwater and theTDS level, given that the concentration of this ion ishigher in high-TDS than in low-TDS groundwater,such that this groundwater is not of a pure

TODOROVIĆ88Fig. 5. Magnesium-to-calcium ratio of groundwater. Legend: I, Groundwater formedin limestones; II, Groundwater associated with dolomites and dolomitic limestones;III, Groundwater tracing to magnesium-rich silicate rocks

into two groups: (1) groundwater occurrences whose Mg concentrations are from 50 to 70 mg/LDistribution of magnesium in groundwater of Serbia 87Fig. 4. Distribution of magnesium in Serbia’s groundwater resources. Legend: 1


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(factor analysis, hydrogeochemical processes, groundwater, factor loadings, Serbia)
similarities between samples (i.e. groundwater occurrences).The goal of multivariate statistical methods is to identify the hydrogeochemical processes that govern theformation of groundwater composition. If the geological and

factor analysis in identification of dominant hydrogeochemical processes of groundwater 59Table 1. Elementary statistical quantities for the 40 groundwater samples.Table 2. Factor loadings and percentage of variance explained by

GHEBREMICHAEL, K., BUAMAH, R. & AMY, G. 2011. Fluoride occurrence in groundwater in the Northern region of Ghana, Proceedings ofIWA Specialist Groundwater Conference in Belgrade,267–275.STEVENS, J.P. 1992. Applied multivariate