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    STUDIA BIOLOGIA - Issue no. 1 / 2007  
         
  Article:   THE MICROBIAL DISTRIBUTION FROM WATER AND SEDIMENT OF TARNITA DAM RESERVOIR.

Authors:  MANUELA-CLAUDIA CURTICĂPEAN, MIHAIL DRĂGAN-BULARDA.
 
       
         
  Abstract:  The Tarnita dam reservoir takes part from big dam reservoirs disposed in a „water fall” system, in upper basin of the Somesul Mic River. The reservoir has the following functions: mainly – energetic, flood aversion, wave attenuation and, in the future, guarantee with drinking water for Cluj-Napoca city. The study consists in determination of four hygienico-sanitary groups of bacteria from water and sediment of the lake. The samples (fourteen water samples and seven sediment samples) were collected seasonally, from different points and depths. The results of the analyses shown that the number of bacteria from each group had seasonally variations depending on sampling site. Using ANOVA test and correlation coefficient (r) has been established that the next physico-chemical indicators influence the four hygienico-sanitary bacteria groups: temperature, dissolved oxygen, biochemical oxygen demand (BOD) and quantity of organic material determined by KMnO4 method (CCO-Mn). In addition, there have been observed differences between the middle and peripheral zones of the lake, showing the presence of the negative influences in these zones of the lake.  
         
     
         
         
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