Cip Baraj Gölü (Elazığ)’nde Sediment Gözenek Suyunda Fosforun Mevsimsel Değişimleri

Yıl 2016, Cilt: 16 Sayı: 4, 299 - 310, 06.11.2016

Serap Saler , Gökhan Karakaya

https://doi.org/10.17693/yunusae.v16i26717.281029

Öz

Bu araştırma, Cip Baraj Gölü litoral sedimentinde fosforun mevsimsel değişiminin araştırılması amacıyla 2011 yılı kış, ilkbahar, yaz ve sonbahar mevsimlerinde alınan örneklerle yürütülmüştür. Gölde belirlenen istasyondan alınan sediment ve sediment üstü su örneklerinde toplam fosfor ve fraksiyonları başta olmak üzere bazı fiziksel ve kimyasal analizler yapılmıştır. Çalışmada sediment gözenek suyunda 32-82 μgL^-1 arasında değişen TFF konsantrasyonları ve 20,60-32,35 μgL^-1 arasında değişen TFO konsantrasyonları gölün ötrofik besin düzeyine yakın değerlerde seyrettiğini göstermiştir. Bu çalışmadaki TFO konsantrasyonunun sediment üstü sudaki fosfor derişimlerine oranı (yaklaşık 1,5-2 kat) sedimentten fosfor salınımını teşvik edecek ölçüde yüksek gözükmemektedir. Cip Baraj Gölü’nde sediment gözenek suyuna ait TFE/TFO değerleri 0,13-0,19 arasında değişmiş olup sedimentten fosfor salınımının engellenmediği ortaya konulmuştur. Cip Baraj Gölü sediment üstü su TFF değerleri, sediment gözenek suyu TFF değerleri ile paralel olarak mevsimsel farklılıklar göstermiş ve literatür değerlerden yaklaşık 1,5-2 kat fazla olduğu bulunmuştur. Bu durum ise sedimentten fosfor salınımının oldukça düşük kalmasında etkili gözükmektedir. Cip Baraj Gölü suyunda 50,08-83,24 µg P L^-1 arasında tespit edilen toplam fosfor değerleri, literatürde yer alan indekslere göre gölün trofik durumunun mesoötrofik ve ötrofik sınıfına girdiğini göstermiştir. Gölün besin seviyesinin korunabilmesi için öncelikle dış kaynaklı fosfor yükünün kontrol altına alınarak azaltılması gerekliliği belirlenmiştir.

Anahtar Kelimeler

Cip Baraj Gölü, fosfor, gözenek suyu, sediment

The Seasonal Variations of Phosphorus in Sediment Pore Water of Cip Dam (Elazığ)

Öz

Samples were taken from Cip Dam in winter, spring, summer and autumn seasons of the year 2011 for determining the seasonal changes in littoral sediment’s phosphorus level. Sediment and episediment water samples were taken from determined station, and then some physical and chemical analysis were performed firstly on the phosphorus and its fractions. In this study, TFF concentrations of sediment pore water varied between 32-82 μg L^-1 and TFO between 20,60-32,35 μg L^-1; these values showed that the lake has eutrophic characteristics. The ratio of TFO concentration to the episediment water (approximately1.5-2 times) could not be seen in high enough to stimulate phosphorus oscillations. In Cip Dam TFE/TFO values of sediment pore water varied between 0.13-0.19, and these results were put in no inhibition of phosphorus oscillation has been occurred. TFF values of episediment of Cip Dam Lake were showed parallel seasonal differences with TFF values of sediment, and were found to be 1.5 - 2 times higher than the values in literature. This would seem that this status has got a low effect on sediment phosphorus oscillation In Cip Dam phosphorus values of lake water were determined to be 50,08-83,24 µg P L^-1 and according to releated literatere  (indices) 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.

Anahtar Kelimeler

Cip Dam, phosphorus, pore water, sediment

Kaynakça

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