Seasonal changes of phosphorus sediment pore water in Cip Dam Lake (Elazig)

For this study samples were taken from Cip Dam Lake in Winter, Spring, Summer and Autumn seasons of 2011 for determining the littoral sediment?s phosphorus seasonal variations. Sediment and episediment water samples were taken from the determined station and some physical and chemical analysis were made as phosphorus and phosphorus fractions being first analysis.In the study TFF concentrations of sediment pore water were changed between 32-82 ?g/L and TFO concentrations between 20,60-32,35 ?g/L and these values showed that the lake has got eutrophic characteristics. The ratio of TFO concentration to the episediment water (approximately1.5-2 times) could not be seen in high values to stimulate phosphorus oscillations. In Cip Dam Lake TFE/TFO values of sediment pore water were changed between 0.13-0.19 and these results were put in no inhibition of phosphorus oscillation has been occured.TFF values of episediment of Cip Dam Lake were showed parallel seasonal differences with TFF values of sediment and were found 1.5- 2 times higher from the related literature. This would seem that this status has got a low effect on sediment phosphorus oscillation.In Cip Dam Lake phosphorus values of lake water were determined as 50,08-83,24 µg P/L and according to releated literatere indexes the trophic status of the lake could be evaluated as mesotrophic and eutrophic. To protect the lake nutrient level first of all allocthonus phosphorus entrances had to be reduced and taken under control.