Ayamama Deresi’nin Marmara Denizi’ne Deşarj Alanındaki Bakteriyolojik Kirlilik Düzeyinin İncelenmesi

Ozet Ayamama Deresi'nin Marmara Denizine dokuldugu alanda Marmara Denizi'ni ne derecede kirlettigini saptamak uzere Mayis 2007- Nisan 2008 aylari arasinda, Ayamama Deresi'nin Marmara Denizine dokuldugu alanda ve cevresindeki alti farkli istasyondan iki haftada bir deniz suyu ornekleri alinarak fekal koliform, total koliform, fekal streptokok, Salmonella spp. ve total mezofilik aerobik heterotrofik bakteriler yonunden incelenmistir. Ornek alinan yedi bolgede de genellikle bulunan bakteri duzeylerinin deniz suyu kalite standartlarinin uzerinde oldugu saptanmistir. Incelenen yedi bolge icinde en iyi durumda olan bolgenin, desarj noktasindan 1 kilometre acikta bulunan 6 numarali istasyon, en kirli bolgenin ise Ayamama Deresi'nin Marmara Denizi'ne dokuldugu nokta olan 1 numarali istasyon oldugu tespit edilmistir. Ayni zamanda, indikator bakteri sayisinin aylara ve mevsimlere gore dagilimlarinin bolgelere bagli olarak degiskenlik gosterdigi saptanmistir. Ayrica istasyonlarin bakteriyolojik kirlilik acisindan benzerligini saptamak uzere kumeleme analizi yapilmis, kumeleme analizi sonucu elde edilen dendogramlardan desarj noktasindan 500 metre acikta bulunan istasyon, Hava Harp Okulu (Yesilkoy) ve dort yildizli bir otel ve Yesilyurt Spor Kulubu onu olarak belirtilen istasyonlarin fekal koliform, total koliform, fekal streptokok ve Salmonella spp. sayilari acisindan birinci derecede, desarj noktasindan 1 kilometre acikta bulunan istasyonun ise genellikle ikinci derecede benzerlik gosterdigi saptanmistir. Sonuc olarak, tum bulgular incelendiginde Ayamama Deresi'nin Marmara Denizi icin cok ciddi bir bakteriyolojik risk tasidigi acikca gorulmektedir. Anahtar Kelimeler: Fekal koliform, fekal streptokok, su kirliligi. Examination of the Level of Bacteriological Pollution in the Discharge Area of the Ayamama Stream to the Marmara Sea Abstract In this study seawater samples were taken from Ayamama stream's discharge point and from around of its six different areas every 15 days, and were examined in terms of bacteria such as faecal coliform, total coliform, faecal streptococci, Salmonella spp. and total mezophilic aerobic heterotrophic bacteria from May 2007 to April 2008. It is found that in all of the seven areas from which samples were taken, bacteria counts found are over seawater quality standards. It is found that the area in the best condition is station 6 which is far away 1 km from discharge point and the worst one is station 1 which is discharge point of the Ayamama stream to Marmara sea. Also, it is determined that the number of indicator bacteria show difference depending on months and seasons. Furthermore, a hierarchical ascendant cluster analysis was used to classify the sampling stations into similar groups. Dendograms obtained from cluster analysis has revealed that stations which are far away 500 m discharge point, in front of Air Force Academy (Yesilkoy), an four-star hotel and Yesilyurt sports club were similar at the first level in terms of the number of faecal coliform, total coliform, faecal streptococci and Salmonella spp. However, station 6 which is far away 1 km from discharge point was similar at the second level. As a result, when all findings were examined it was seen that Ayamama stream was a very serious threat for the sea of Marmara.