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Assessment of eutrophication in the Berdan River Basin (Türkiye) using various classification tools

Özbay Özgür, Akçay Ismail, Alp Mehmet Tahir, Göksu Münir Ziya Lugal

Oceanological and Hydrobiological Studies

2024

Vol. 53, No. 1

16--23

The trophic status of the Berdan River Basin was determined using univariate and multivariate classification tools. The results indicated that the water quality/trophic status of a downstream section of the Berdan River was characterized as “poor/eutrophic” due to anthropogenic inputs from agricultural, industrial and domestic wastewater discharges. Strong and positive correlations between TRIX values and concentrations of eutrophication parameters suggest that nutrient enrichment of water in the Berdan River during its flow will result in further eutrophication in the coastal region of the NE Mediterranean Sea. Therefore, the trophic and pollution status of the Berdan River, as well as other regional rivers flowing into the coastal area of the NE Mediterranean Sea should be monitored to develop action plans and sustainable management of eutrophication in regional rivers and the oligotrophic Mediterranean Sea.

Nutrient inputs from two major rivers into the cilician basin of the north-eastern Mediterranean Sea

Türkeri Mehmet, Marankoz Suat, Özbay Özgür, Akçay Ismail, Alp Mehmet Tahir

Oceanological and Hydrobiological Studies

2023

Vol. 52, No. 2

240--244

In this study, dissolved nutrients concentrations weremeasured monthly at downstream points of the tworegional rivers (the Berdan and Göksu rivers) flowing into the Cilician Basin of the North-eastern (NE) Mediterranean Sea. The dissolved nutrients data obtained between September2021 and August 2022 were used to determine riverinenutrient fluxes. This study showed that spatial and temporalvariations were recorded in nutrients concentrations of thetwo regional rivers with the maximum values consistentlyrecorded in the Berdan River having lower volume fluxes.The annual nutrient inputs of the two regional riversindicated that higher amounts of dissolved nutrients werecarried by the Göksu River due to its higher volume fluxrate. The calculated molar ratios from total nitrogen (TN)and phosphorus (TP) fluxes ranged from 13 in the GöksuRiver to 22 in the Berdan River. The higher TN/TP molar ratiocompared to the classic Redfield Ratio of N/P in the BerdanRiver is very likely to modify nutrient dynamics leadingto further eutrophication in the shelf waters of the NE Mediterranean Sea.