Žarko Vranjanac, Dejan Vasović

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From a global perspective, there is currently an ever-increasing problem of natural water resource pollution and daily decrease of available amounts of potable water. In addition to the definition of their ecological status, the existing problems of polluted water systems also require that parameters of the oxygen regime should be determined. The importance of monitoring the indicators of oxygen regime in rivers is aimed at achieving sustainable water management and preserving environmental quality. Oxygen regime in the Nišava river ecosystem is monitored based on specific physico-chemical indicators: biological oxygen demand (BOD), chemical oxygen demand (COD), total organic carbon (TOC), dissolved oxygen and oxygen saturation. The aim of this paper is to demonstrate the significance of oxygen regime indicators by monitoring their concentrations at measuring stations along the Nišava, which can help assess the quality of the given aquatic ecosystem. The paper relies on the Results of Surface and Ground Water Quality Testing by the Environmental Protection Agency, Ministry of Agriculture and Environmental Protection of the Republic of Serbia for two measuring stations along the Nišava in 2013. Mean annual concentrations of oxygen regime indicators for 2013 are BOD = 2.6 mg/L and COD = 4.3 mg/L, which indicates that the value of their respective ratio is 0.6, which is important for oxygen regime. A comparative analysis performed by the water supply PUC “Naissus”, based on the values of these environmental indicators, also confirmed that water quality in the Nišava corresponds to Class II surface water. Therefore, this paper highlights the importance of monitoring oxygen regime indicators of the Nišava River for the purpose of sustainable water management and environmental quality preservation.


the Nišava River, indicators of oxygen regime, case study

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Council Directive 75/440/EEC of 16 June 1979 concerning the quality required of surface water intended for the abstraction of drinking water in the Member States: Official Journal L 194, 25 July 1975, p. 26.

Directive 2000/60/EC of the European Parliament and of the Council establishing a framework for Community action in the field of water policy, EU Water Framework Directive. (

Ministry of Agriculture and Environmental Protection, Serbian Environmental Protection Agency, Annual Report: The results of the quality of surface and groundwater for 2013, Belgrade 2014.

Regulation on determining the water bodies of surface water and groundwater "Official Gazette of the RS", No. 50/2012.

Regulation on limit values for pollutants in surface and groundwater and sediments and deadlines for their achievement, "Official Gazette of the RS", no. 50/2012.

Regulation on the national list of environmental indicators, "Official Gazette of the RS", No. 37/2011.

Regulation on the parameters of the ecological and chemical status of surface water and the parameters of the chemical and quantitative status of groundwater, "Official Gazette of the RS", No. 74/2011.

Takić Lj., Mladenović-Ranisavljević I., Stamenković I., Živković N., Environmental assessment as a function of the BOD-5 parameter value, 46th International October Conference on Mining and Metallurgy, pp. 473-476, 2014., Bor, Serbia.

Takić Lj., Vasović D., Živković N., Indicators of oxygen demand in the ecosystem of the Danube in Serbia, Facta Universitatis Series: Working and Living Environmental Protection Vol.13, No 1, 2016, pp. 35-39.



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