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Article

Groundwater Nitrate Pollution Sources Assessment for Contaminated Wellfield

1
Center for Advanced Computing and Modelling, University of Rijeka, Radmile Matejcic 2, 51000 Rijeka, Croatia
2
Faculty of Engineering, University of Rijeka, Vukovarska 58, 51000 Rijeka, Croatia
3
Faculty of Geotechnical Engineering, University of Zagreb, Hallerova aleja 7, 42000 Varaždin, Croatia
*
Author to whom correspondence should be addressed.
Academic Editors: Francesco Sdao and Filomena Canora
Water 2022, 14(2), 255; https://doi.org/10.3390/w14020255
Received: 14 December 2021 / Revised: 7 January 2022 / Accepted: 13 January 2022 / Published: 16 January 2022
(This article belongs to the Special Issue Groundwater Vulnerability to Pollution Assessment)
Nitrates are one of the most common groundwater contaminants and they come from different sources. The paper presents a study of groundwater quality at Varaždin wellfield in the north part of Croatia. The nitrate concentration at this location has been above the maximum allowed concentration for several decades, which has made the opening of new wellfields costly. Based on the previously developed groundwater flow model, a model that covers the narrow area of the wellfield is developed. The influential zone of the observed wellfield in working conditions is determined. Based on the developed model, the sources of nitrate pollution are located, which can be generally divided into non-point and point sources. Considering the time of groundwater retention in the horizontal flow, it is concluded that the water protection zones are marked following the applicable ordinance. Based on the developed groundwater flow model at the observed wellfield, a simulation of nitrate pollution propagation by advection and dispersion processes is performed. The simulation results point out the location of the poultry landfill as the largest source of nitrate pollution. However, poultry farms, which are located in the influence area of the wellfield, also contribute significantly to the nitrate concentration at the wellfield. View Full-Text
Keywords: groundwater; nitrate; groundwater flow model; nitrate pollution propagation; pollution source identification groundwater; nitrate; groundwater flow model; nitrate pollution propagation; pollution source identification
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MDPI and ACS Style

Šrajbek, M.; Kranjčević, L.; Kovač, I.; Biondić, R. Groundwater Nitrate Pollution Sources Assessment for Contaminated Wellfield. Water 2022, 14, 255. https://doi.org/10.3390/w14020255

AMA Style

Šrajbek M, Kranjčević L, Kovač I, Biondić R. Groundwater Nitrate Pollution Sources Assessment for Contaminated Wellfield. Water. 2022; 14(2):255. https://doi.org/10.3390/w14020255

Chicago/Turabian Style

Šrajbek, Marko, Lado Kranjčević, Ivan Kovač, and Ranko Biondić. 2022. "Groundwater Nitrate Pollution Sources Assessment for Contaminated Wellfield" Water 14, no. 2: 255. https://doi.org/10.3390/w14020255

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