Determination of the trace elements levels of some streams and terrestrial input into Black Sea with stable carbon and nitrogen isotope ratios in the Eastern Black Sea catchment

In this study, physico-chemical water quality parameters of the streams and trace element concentration in water, suspended solid matter and sediment of some streams in Eastern Black Sea Catchment were determined. Also, terrestrial input carried into Black Sea by Fırtına Stream was identified using stable carbon and nitrogen isotope analysis. The annual means of parameters for all streams featured in this study were 14.22 °C, 7.62, 158.63 μS/cm, 10.38 mg/L for temperature, pH, electrical conductivity, and dissolved oxygen, respectively. On the other hand, the amount of suspended solid matter (SSM) was 68.36 mg/L, NO2- N was 0.016 mg/L, NO3-N was 0.340 mg/L, o-PO4-P levels were 0.388 mg/L, and the level of SO4 concentration was 10.46 mg/L. In addition, there was no significant heavy metal pollution measured in the sampled streams of Black Sea Catchment despite the seasonal changes in water, sediment and SSM. The stable carbon and nitrogen isotopical signiture showed that terrestrial contribution to the marine sediment was % 53 in April, 32 % in October.