Akasya Topçu

Effect of Rainbow Trout Cage Culture on Sediment Phosphorus Release in Almus Dam Lake (Tokat)

This research was conducted one of the rainbow trout cage cultural area in Almus Dam Lake (Tokat), in April 2015 and October 2015; two stations represent the cultural area (I-II) and two control stations (III-IV) outside of the main current, located at 250 m and 500 m respectively from the cage stations. In this study sediment phosphorus release was estimated and the effective factors in release mechanism were discussed. Research data presents low diffusive phosphorus flux; the lowest value (14.58 μgP m d) was estimated in the IV control station in april whereas the highest value (31.73 μgP m d) was evaluated in the I station located in the cage culture area in the same month. The effective phosphorus fractions in the diffusive phosphorus flux from sediment to water column were evaluated as organically bound P (Org≈P; 24%) > calcium bound P (Ca≈P; 22%) > Iron+aluminium bound P (Fe+Al≈P; 18%) > carbonate bound P (CO 3 ≈P; 13%), respectively. Furthermore the other effective properties in enhancing phosphorus flux were determined as the high ratio TFe/TFO of the sediment porewater and the high clay-silt proportion of the sediment texture.

Göl ve Göletlerin Restorasyonunda Sedimentteki Fosfor İnaktivasyonunun Rolü

Sucul sistemlere olan asiri miktarda fosfor girdisi otrofikasyon sorununu beraberinde getirmektedir. Sedimentler akvatik sistemlerde fosfor kaynagi veya fosfor tuzagi olarak rol almaktadir. Gol ve goletlerin fosfor icerigini azaltmak icin su sutunundan fosforun cokeltme ile uzaklastirilmasi ve gol sedimentinden su sutununa olan ic fosfor yuklemesinin indirgenmesi adina fosfor inaktivasyon yontemleri bir gol restorasyon teknigi olarak uygulanmaktadir. Bu calisma kapsaminda, akvatik sistemde fosfor icerigini kontrol amacli uygulanan fosfor inaktivasyon yontemlerinin farkli ozellikteki sucul sistemlerde uygulanis sekilleri ve sonuclari ozetlenmistir