ENZYMATIC ACTIVITY OF THE TARNITA DAM RESERVOIR SEDIMENT

The Tarnita dam reservoir takes part of a big complex of dam reservoirs disposed in a 'water fall' system, in the upper basin of the Somesul Mic river. The reservoir has the main function - energetics and, in the future, to supply with drinking water the Cluj-Napoca city. In the sediment samples, the following enzymatic activities have been quantitatively determined: phosphatase, actual and potential dehydrogenase, catalase, urease and protease. Non-enzymatic catalytic activity was also measured. Based on the relative values for the enzymatic activities, the enzymatic indicator of the sediment quality (EISQ) was calculated (ranging from 0.144 to 0.462). The enzymatic activities have been qualitatively determined for maltase, saccharase, lactase, cellobiase, amylase, dextranase, levanase, cellulase and inulinase. The correlation between the enzymatic and bacteriologic potential was statistically calculated.