GHEORGHE ROMANESCU, MARINA IOSUB, ION SANDU, IONUT MINEA, ANDREI ENEA, DAN DASCALITA, OANA-ELENA HAPCIUC SPATIO-TEMPORAL ANALYSIS OF THE WATER QUALITY OF THE OZANA RIVER
The assessment of the chemistry and water quality of the Ozana river is necessary from two perspectives: firstly, the fact that the groundwater of its lower basin is tapped and supplied to four cities from eastern Romania, namely Roman, Pascani, Targu Frumos and Iasi, which sum up a total of 450000 inhabitants; secondly, the lower basin is classified as vulnerable to nitrite pollution (according to the Siret river basin management plan, established based on the regulations stipulated in the 60/2000/CE Framework Directive). The water quality index (calculated for each parameter, according to the multi-annual mean and its respective weight) has clearly emphasized the impact of the use of nitrites and phosphorus (90%). The water quality, according to the index, is very good in Boboieºti (-16), and good to poor in Dumbrava (48).
Keywords: physicochemical parameters, quality classes, Ozana river, pollution, water quality index