DOI: 10.5593/SGEM2014/B31/S12.088


G. Romanescu, G.M. Cojoc, A. Tirnovan, D. Dascalita, E. Paun
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-13-1 / ISSN 1314-2704, June 19-25, 2014, Book 3, Vol. 1, 679-690 pp

The Bistrita River holds a high hydro power potential and, in time, suffered different anthropogenic influences, both in terms of the modification of the drain (because of the hydro-energetic development) and in terms of water quality (because of the development of the riparian agglomerations and the industrial complexes). The Bistrita River represents a significant source of water supply for some important economical operators in Piatra Neamt, Roznov, Buhusi and Bacau. For Piatra Neamt the Bistrita River also has potable purposes. The flow rates of the river have been systematically monitored both from a quantitative and a qualitative point of view, for all the parameters, in accordance with the Framework Directive 60/2000/EEC. This paper presents a study on the evolution of only few physical and chemical parameters, which influence the quality of the Bistrita River, such as: pH, dissolved oxygen, CBO5, CCOMn, CCO-Cr, ammonium, nitrites, nitrates and total iron. After many studies and researches, the conclusion is that for all the parameters on the upstream sector, the waters of the Bistrita River can be included into the good quality class (the Ist class of quality). In the lower and downstream sectors the water is included in the moderate class because the parameters suffer some quality changes. That is, in the lower sector, namely in the sector downstream the industrial platform of Bacau, the Bistrita River waters have been influenced by a number of economical operators that produce chemical fertilizers or paper. Currently these sources of pollution are closed or under conservation (LETEA Bacau Paper Factory). The period under review reveals a significant reduction of the pollutants discharged along the Bistrita River. After the Siret Water Basin Administration imposed some emergency measures, the main economical agents and the human agglomerations bordering the Bistrita River have made important investments for the development of new waste water treatment plants particularly in the agglomerations Bicaz, Piatra Neamt and Bacau. Due to these measures, the pollutant flow specific to the economical agents and the water waste, were greatly diminished. Therefore only a few small sections of the Bistrita River are included in the moderate class, the rest are included in the good quality class (the Ist class of quality).

Keywords: Hydro-technical constructions, anthropogenic influences, physical and chemical parameters, pollution