Influence of the extreme conditions on the water quality and material exchange flux in the Strait of Istanbul

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Altiok H., Aslan A., Övez S., Demirel N., Yuksek A., Kiratli N., ...More

JOURNAL OF MARINE SYSTEMS, vol.139, pp.204-216, 2014 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 139
  • Publication Date: 2014
  • Doi Number: 10.1016/j.jmarsys.2014.06.005
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED)
  • Page Numbers: pp.204-216
  • Keywords: Strait of Istanbul, Exchange flux, Nutrients, Fecal indicator bacteria, Water quality, Marine outfalls, BLACK-SEA, BOSPORUS STRAIT, MARMARA, SHELF, FLOW
  • Istanbul University Affiliated: Yes


This study focuses on the influence of extreme hydrological events on the water quality of the Strait of Istanbul (Bosphorus), a stratified waterway, polluted by sewage outfalls and non-point sources. Monthly collected water quality parameters (nitrate + nitrite, ortho-phosphate, silicate, dissolved oxygen, total suspended solids, chlorophyll-a and fecal indicator bacteria (fecal coliform and enterococci)) were evaluated together with the hydrological data (salinity, temperature and current flow) for 1 year. Two blockage events, identified as extreme conditions, were detected during the study: a lower layer blockage in February 2003 and an upper layer blockage in October 2003.