Original scientific paper
https://doi.org/10.21857/90836cd2qy
DYNAMICS OF NITRATES, PHOSPHATES AND DETERGENTS IN THE UNDERGROUND WATER OF MEDJIMURJE COUNTY WATER SUPPLY SYSTEM
Nikola Sakač
orcid.org/0000-0001-5515-2368
; Sveučilište u Zagrebu, Geotehnički fakultet Varaždin
Nada Glumac
orcid.org/0000-0002-0144-9665
; Međimurske vode d.o.o., Čakovec
Ivan Kovač
; Sveučilište u Zagrebu, Geotehnički fakultet Varaždin
Abstract
Medjimurje county is rich in ground waters. Ground waters are exploited within two water wells – Nedelišće (six wells) and Prelog (two wells). In this paper we investigated some of the main parameters of anthropogenic origin in ground waters: nitrates, phosphates and detergents. We analysed these parameters in a period from 2006 to 2014, on both water wells; Nedelišće and Prelog. We also analysed the influence of the precipitation (quantity and distribution) and flood on ground waters and their correlation with measured parameters. Nitrate concentrations in water well Nedelišće obtained lower concentration compared to water well Prelog. In a period from 2006 to 2010 nitrate concentrations were constantly decreasing. From 2011 to 2014 floods and precipitations caused increase of nitrate concentrations (up to 12 mg/L). The highest nitrate concentrations were observed in well closest to the inhabited area (Nedelišće) and in the area with the intensive agricultural production (Prelog). All investigated parameter concentrations were below maximum acceptable – tolerant concentration.
Keywords
nitrates; phosphates and detergents in drinking groundwaters; flood sediments as hot spots; red clover (Trifolium pratense) as cover crop
Hrčak ID:
191521
URI
Publication date:
29.12.2017.
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