HYDROCHEMICAL FEATURES AND THE WATER QUALITY OF THE FLUVIAL LAKES FROM THE SOUTH – WEST OF DOBRUDJA
Camelia Eliza (TELTEU) PĂSCULESCU
University of Bucharest, Faculty of Geography, Bd. Nicolae Bălcescu No. 1,
1st district, 70111, Bucharest, Romania
Abstract. – Hydrochemical features and the water quality of the fluvial
lakes from the south – west of Dobrudja. The evidence of the hydrochemical
features and the water quality of the fluvial lakes is based on the processing
of data concerning chemical parameters for the years 1996 – 2008. The values of
the chemical parameters have been analysed and fit according to the Order
161/2006. The ionic composition of the fluvial lakes ranged between 412.2 mg/L –
928.17 mg/L and is characterized almost 65% by prevailing of the bicarbonate
anion. The magnesium ion (38.32 mg/l – 4.76 mg/l) contributes to the
mineralization of the water with great values compared to the values of the
calcium ion (37.20 mg/l – 31.83 mg/l). But the concentration of chlorine (50.76
– 148.25 mg/l ) and sulfate (40.15 – 95.41 mg/l) anions is higher than magnesium
and calcium cations. The mean values of the dissolved oxygen ranged between 7.32
mg O2/l and 9.78 mg O2/l. The potential for hydrogen ion concentration has
values between 7.8 and 8.5 so the fluvial lakes are alkaline and are favorable
for the growth of animal and vegetable organisms. These fluvial lakes have fresh
water and they are used in pisciculture.
Keywords: fluvial lakes, Dobrudja, ionic composition, oxygen regime, pH.
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