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Determining surface water and bed sediment quality of Lake Kopa
(Artvin Çoruh Üniversitesi, 2016) Kazangapova, Nurgul B.; Romanova, Sofiya M.; Alipbeki, Ongarbek A.; Ponomarenko, Oksana I.; Batsanov, Andrei S.
In this research, the results of a hydro-chemical study of Lake Kopa in Kazakhstan are described, in the context of the regional geography and aggravating ecological problems of the lake. Besides analyzing the concentrations of all major ions, heavy-metal ions and other pollutants, their vertical and horizontal distribution were also assessed. Moreover, water pollution indices (WPI) were calculated for individual ions, classes of pollutants, and total pollution, revealing serious overload of humaninduced pollution within the lake’s ecosystem. Concentrations of major ions and WPI were monitored over 2009-2013 period, revealing a distinct seasonal pattern and a multi-year periodicity in respect to the measured parameters. In addition, studying ion exchange between lake water and bottom sediment showed complex non-equilibrium processes besides leaching out Ca2+ and its exchange for Na+.