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In: Acta Hydrologica Slovaca, vol. 18, no. 1
Viera Kováčová

Trends of nitrate ions content in Žitný ostrov channel network

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Year, pages: 2017, 57 - 67
Keywords: nitrate ions, surface water quality, nitrogen compounds pollution
Original source URL: http://www.ih.sav.sk/ah

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Anthropogenic activities realized in river basins may result in a deterioration of water quality with detrimental effects on the ecosystems. Nitrate leaching from agricultural land is usually considered a non-point source pollution problem, making the specific polluter hard to identify. The Žitný ostrov is one of the most productive agricultural areas of Slovakia, situated on the Danube Lowland. Under its surface is the richest water source of Slovakia. For this reason, it is very important to deal with quantity and quality of water resources in this region. Many practices result in non-point source pollution of groundwater and the effects of these practices accumulate over time. These sources include fertilizer and manure applications, dissolved nitrogen in precipitation, irrigation flows, and dry atmospheric deposition. Numerous studies have suggested that leaching of NO3- following high input rates of chemical fertilizer and due to mineralization of organic N already present in the soils can cause degradation of surface and groundwater quality. Directive 2000/60/EC sets out general provisions for the protection and conservation of groundwater. Measures to prevent and control groundwater pollution should be adopted, including criteria for assessing good groundwater chemical status and criteria for the identification of significant and sustained upward trends of water quality and for the definition of starting points for trend reversals. The study is focused on identification of the long-term trends in the surface water quality in channel network on Žitný ostrov. The paper shows changes in measured values of nitrates in particular channels in years 1987 – 2016. It was shown the channel water quality has been changed significantly during the period 1987 – 1991, after 1991 is slightly decreased.

How to cite:

ISO 690:
Kováčová, V. 2017. Trends of nitrate ions content in Žitný ostrov channel network. In Acta Hydrologica Slovaca, vol. 18, no.1, pp. 57-67. 2644-6291 (printed until 2018).

APA:
Kováčová, V. (2017). Trends of nitrate ions content in Žitný ostrov channel network. Acta Hydrologica Slovaca, 18(1), 57-67. 2644-6291 (printed until 2018).