Assessment of longitudinal variation in nutrients load in lower sector of the Danube River to its flow into the Black Sea
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574.5:556.54:556.46 (1)
General ecology and biodiversity (764)
Hydrosphere. Water in general. Hydrology (450)
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SECELEANU-ODOR, Daniela, TEODOROF, Liliana, BURADA, Adrian, TIGĂNUȘ, Mihaela, DESPINA, Cristina, SPIRIDON, Cosmin, TUDOR, Marian, ENE, Antoaneta. Assessment of longitudinal variation in nutrients load in lower sector of the Danube River to its flow into the Black Sea. In: Environmental Toxicants in Freshwater and Marine Ecosystems in the Black Sea Basin: BSB27-MONITOX, 8-11 septembrie 2020, Kavala. Kavala, Greece: International Hellenic University,, 2020, pp. 25-26.
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Environmental Toxicants in Freshwater and Marine Ecosystems in the Black Sea Basin 2020
Conferința "Environmental Toxicants in Freshwater and Marine Ecosystems in the Black Sea Basin"
Kavala, Grecia, 8-11 septembrie 2020

Assessment of longitudinal variation in nutrients load in lower sector of the Danube River to its flow into the Black Sea

CZU: 574.5:556.54:556.46

Pag. 25-26

Seceleanu-Odor Daniela1, Teodorof Liliana1, Burada Adrian1, Tigănuș Mihaela1, Despina Cristina1, Spiridon Cosmin1, Tudor Marian1, Ene Antoaneta2
 
1 Danube Delta National Institute for Research and Development,
2 "Dunarea de Jos" University of Galati
 
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Disponibil în IBN: 3 decembrie 2020


Rezumat

This paper considers the assessment of surface water quality, from nutrients point of view, in the line with the provision of the Water Framework Directive, in the Romanian sector of the Danube River between Calarași-Silistra area up to its 3 flowing mouths into the Black Sea. A monitoring campaign, conducted in 2019 over 25 sampling points along the Danube River, established the longitudinal variation in nutrient loads, including inputs coming from a large urban agglomeration along the studied area. Analytical determinations of ammonium nitrogen, nitrite nitrogen, nitrate nitrogen, total nitrogen, orthophosphates phosphorus and total phosphorus were performed in a certified laboratory using molecular absorption spectrometric methods. These indicators provide relevant information on the degree of water contamination and the presence of untreated or improperly treated wastewaters. Results showed differences between total nitrogen concentration and the sum of nitrogen inorganic forms, indicating an increased load of organic matter. However, the values determined for nutrients, both nitrogen and phosphorus compounds, in the studied period, generally framed into the target limit of good ecological status according to current legislation. Data collecting in this study also reflect the regional pattern of nutrients conditions in surface water of the lower sector of the Danube River.