Geologia Croatica, Vol. 69 No. 2, 2016.
Original scientific paper
https://doi.org/10.4154/gc.2016.19
Factor analysis applied to distinguish influences of parent material, mining industry and agriculture on the groundwater in the Strumica valley, Macedonia
Ivan Boev
; Faculty of Natural and Technical Sciences, „Goce Delčev“ University Štip, Bul. Krste Misirkov, 10-A, P.O. Box 210, 2,000, Štip, Republic of Macedonia
Ajka Šorša
; 2Department of Geology, Croatian Geological Survey, Sachsova 2, 10,000, Zagreb, Croatia
Biljana Kovačević
; Faculty of Agricultures, ”Goce Delčev” University Štip, Bul. Krste Misirikov, 10-A, P.O. Box 210, 2,000 Štip, Republic of Macedonia
Saša Mitrev
; Faculty of Agricultures, ”Goce Delčev” University Štip, Bul. Krste Misirikov, 10-A, P.O. Box 210, 2,000 Štip, Republic of Macedonia
Blažo Boev
; Faculty of Natural and Technical Sciences, „Goce Delčev“ University Štip, Bul. Krste Misirkov, 10-A, P.O. Box 210, 2,000, Štip, Republic of Macedonia
Abstract
Determination of the groundwater chemistry in Strumica valley was essential since the widespread use of it in the irrigation of agricultural production. For this purpose were collected 224 water samples from boreholes. The groundwater chemical composition was determinated on the selected analytes: As, Sr, Mn, Ni, Cu, Zn, Mo, Ba, Pb, Na, Mg, Al, K, Ca, Ti, Li, Cr, Fe, U, CaCO3, Cl-, NO3-, NH4+, SO42- and PO43-. The source and internal correlations of the analytes were set out by performing multivariate statistical analyses (factor analyses). Factor analyses yielded 7 factors and the geochemical maps of the obtained factors were generated using kriging method. The groundwater chemistry was predominantly controlled by geologic background and some anthropogenic influence due to agriculture and mining to the concentrations and spatial distribution of arsenic, phosphates, sulphates, nitrates and some metals (copper, iron, chromium, lead, nickel, zinc). Mining of copper/gold (molybdenum) in area of Ilovica increased concentration of analytes Al, Cu, Pb, Cr, NO3-, Ni, Zn, Na, K, Li and PO43- in groundwater but only at a local level.
Keywords
groundwater; chemistry; factor analyses; Strumica; Macedonia
Hrčak ID:
162236
URI
Publication date:
30.6.2016.
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