Özet:
Lake Iznik is located in the southern east part of Marmara region within the province of Bursa . Its water is of a big importance to the region with a Mediterranean climate, and an annual rainfall ranging between 500 - 750 rom, falling mainly in the period from October to March . This water is used in dry season for irrigation . In this thesis, a physical study of the region is conducted . The physical , chemical and biological parameters were examined at several sites in order to determine the eutrophication state and a suitable model was applied to represent the lake . Lake Iznik was found to be very near to the eutrophic state and the limiting nutrient in the lake was found to be the phosphorus element .
