The determination with Trophic State Indices of Water Quality in Egirdir Lake

In this study; it was aimed to determine the water quality of the Egirdir Lake, which is the second largest freshwater lake in our country, by using the trophic status indices. The study was carried out in 9 selected stations to represent the whole lake in the spring, summer and autumn periods of 2013 and in the winter periods of 2014. In the seasonal study, analyzes of dissolved oxygen, total phosphorus (TP), chlorophyll-a (Chl-a) and total nitrogen (TN) and measurement of Secchi depth (SD), were performed. At the end of the study, it was determined that the Egirdir Lake was at the mesotrophic level according to the Carlson trophic status index TSI values, the average±1SD interval of the OECD index and the trophic status index of the Water Quality Management Regulatio