Akademik Veri Yönetim Sistemi
International Journal of Environment and Geoinformatics, cilt.12, sa.1, ss.28-42, 2025 (TRDizin)
The coastal areas of the Marmara Sea are exposed to many pollution sources and pollutants. In addition to these sources, freshwater sources such as rivers and streams flow into this inland sea and cause serious stress. In this study, physicochemical parameters such as dissolved oxygen (DO), pH, salinity (S) and temperature (T) measured in surface water samples taken from the coastal area of the Marmara Sea, which is under the influence of intense pollution. In addition, nutrients such as nitrite+nitrate (NO2-+ NO3-), total nitrogen (TN), dissolved inorganic phosphorus (o- PO43-), total phosphorus (TP) and pollution parameters such as anionic surfactant (AS), total petroleum hydrocarbons (TPH) were also analyzed and their correlations with each other were evaluated. Furthermore, the concentrations of particulate organic matter (POC) in water samples and total organic carbon (TOC) in coastal sediments were also determined. Accordingly, DO and pH values were found to be high at the stations where water circulation was active, and these results were similar to chlorophyll-a values. In addition, when the water quality parameters were evaluated according to the continental surface water quality criteria, it was determined that the surface waters of the coastal area of the Marmara Sea were in the middle-class water quality in terms of TN and TP. The highest values of TPH and AS among the stations were found in Poyrazköy station. The high TOC values detected in the sediments of stations such as Erdek, Başiskele and Büyükkumla indicate the presence of a significant organic load. The findings of this study can shed light and provide the basis for long-term studies to make a complete assessment of water quality in these areas.