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    STUDIA GEOLOGIA - Ediţia nr.1 din 2007  
         
  Articol:   DISTRIBUTION OF STABLE ISOTOPES IN SURFACE WATER ALONG THE DANUBE RIVER IN SERBIA.

Autori:  N. MILJEVIĆ, D. GOLOBOČANIN, N. OGRINC, A. MIHAJLOVIĆ. 		 
       
         
  Rezumat:  The activities on the Danube water quality survey in its middle course (elevation 74 – 62 m asl) were carried out during a 5-day sampling campaign in August 2004 using the research ship-laboratory “ARGUS”. 10 locations were chosen on the Danube on the whole length of its flow through Serbia from Bačka Palanka (Nestin, 1287 km to confluence with the Black Sea) to Golubac Branjica (1040 km) and one on the Tisa (Title, 9.5 km to confluence with the Danube). In this stretch the river collects the water mass from its principal tributaries, namely the Tisa River with the largest drainage area of 157 000 km2, the Sava River with largest mean annual discharge of 613 m3/s and the Velika Morava River, creating substantial changes in the regime. Collected samples from mid-river section were analyzed for chemical parameters (dissolved oxygen (DO), total alkalinity, nitrate (NO- 3), sulfate (SO4 2-), ammonium (NH4 +), nitrites (NO2), calcium (Ca2+), and magnesium (Mg2+)), stable isotopes (2H and 18O) in addition with air and water temperature, pH and conductivity measurements. Hydrogen and oxygen stable isotope were used in combination with measured hydrochemical parameters to determine the transport processes in river systems.  
         
     
         
         
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