Primary productivity in the Golden Horn.
The shores of the Golden Horn--once most important seaport of the region--represented throughout history a romantic and recreational venue. This tributary to the Bosphorus, however, became seriously polluted with the extensive industrialization and rapid population growth in Istanbul over the past century. Two main tributaries, the Alibeykoy and the Kagithane, dumped both liquid and solid waste from residential areas and industry (small and large-scale) into the Golden Horn. As a result of this pollution, the landward three to four kilometers of the estuary became swamped with sediment. The dominance of anaerobic activity resulted in a highly unpleasant smell, and the shallow depth as one progressed up the bay restricted navigation. In early 1997 The Istanbul Metropolitan Municipality began a dredging operation and gradually diverted all domestic and industrial wastewater discharge from the Golden Horn. Since then there have been remarkable improvements in water quality. This paper presents the state of eutrophication through the water body of the Golden Horn; parameters such as DO, TKN, NH(3)-N, NO(3)-N, the total phosphorus (TP) and dissolved phosphorus (PO(4)-P), phytoplankton and chlorophyll-a have been were analyzed in samples of water taken from various points in the Golden Horn. The presence of DO and the phytoplankton, both indicators of primary productivity in an aquatic body, has been evaluated in relation to former conditions.
Gönüllü
M Talha
MT
Environmental Engineering Department, Yildiz Technical University, Besiktas-Istanbul, Turkey. gonul@yildiz.edu.tr
Avşar
Yaşar
Y
Bayhan
Hürrem
H
Sakar
Süeyman
S
Arslankaya
Ertan
E
Apaydin
Omer
O
Kurt
Uĝur
U
D000641:Ammonia / Q000032:analysis; D002244:Carbon / Q000378:metabolism; D002734:Chlorophyll / Q000378:metabolism; D000077194:Chlorophyll A; D004784:Environmental Monitoring; D009566:Nitrates / Q000032:analysis; D009584:Nitrogen / Q000032:analysis; D010100:Oxygen / Q000032:analysis*; D010710:Phosphates / Q000032:analysis; D010758:Phosphorus / Q000032:analysis; D010788:Photosynthesis; D010839:Phytoplankton / Q000378:metabolism*; D012623:Seawater; D014421:Turkey; D014874:Water Pollutants, Chemical / Q000032:analysis*
D009566:Nitrates; D010710:Phosphates; D014874:Water Pollutants, Chemical; D002734:Chlorophyll; D010758:Phosphorus; D002244:Carbon; D000641:Ammonia; D009584:Nitrogen; D010100:Oxygen; D000077194:Chlorophyll A