Level of surface water eutrophication in Danube river basin

Rok, strany: 2019, 102 - 110

Eutrophication as excessive plant growth resulting from nutrient enrichment (mainly nitrogen and phosphorus compounds) by human activity is the primary problem relating most surface waters today. The external supplies of N and P to aquatic ecosystems are derived from a wide variety of sources, including groundwater, fluvial, and atmospheric inputs. The environmental consequences of excessive nutrient enrichment are the degradation of water resources by eutrophication and worsening of water quality. Monitoring of surface water bodies has been provided in terms of requirements of the Water Framework Directive in the period of 2010–2015. With regards of international legislative for the ecological status assessment, chemical status, biological quality elements, supporting physical-chemical and hydro-morphological quality elements have been investigated. The aim of this contribution was to evaluate eutrophication state of water in Danube River basin following the assessment physical-chemical and microbiological indicators in monitored period. Nitrate-N concentrations 1 of 16 monitoring sites (6.66 %) in 2015 was over the limit value 5 mg.l-1 N-NO3-. Nitrite-N concentrations 15 of 17 monitoring sites (88.23%) in 2010 and 4 of 16 (25%) in 2015 was over the limit value 0.02 mg.l-1 N-NO2-. For phosphorus, of 17 monitoring sites 1 (5.88%) was over the limit value 0.4 mg.l-1 Ptot in 2010, all of the samples meet the criteria in 2015 and are not at risk. In general, the rate of increase the external supplies of N and P has slowed down in Danube River basin during the monitoring period.

ISO 690:

Kováčová, V. 2019. Level of surface water eutrophication in Danube river basin. In Acta Hydrologica Slovaca, vol. 20, no.1, pp. 102-110. 2644-4690. DOI: https://doi.org/10.31577/ahs-2019-0020.01.0012

APA:

Kováčová, V. (2019). Level of surface water eutrophication in Danube river basin. Acta Hydrologica Slovaca, 20(1), 102-110. 2644-4690. DOI: https://doi.org/10.31577/ahs-2019-0020.01.0012

Vydavateľ: Institute of Hydrology SAS, Dúbravská cesta 9, 841 05 Bratislava, Slovakia