Pollutant dynamics between The Black Sea and The Marmara Sea: Basis for wastewater management strategy

Orhon D., Sozen S., Kirca V. Ş. Ö., Duba S., Mermutlu R., Sumer B. M.

MARINE POLLUTION BULLETIN, vol.168, 2021 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 168
  • Publication Date: 2021
  • Doi Number: 10.1016/j.marpolbul.2021.112388
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, PASCAL, Aerospace Database, Aquatic Science & Fisheries Abstracts (ASFA), Artic & Antarctic Regions, BIOSIS, CAB Abstracts, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, EMBASE, Environment Index, Geobase, MEDLINE, Metadex, Pollution Abstracts, Veterinary Science Database, Civil Engineering Abstracts
  • Keywords: Pollutant dynamics, The Bosphorus, The Black Sea, The Marmara Sea, Water quality, Wastewater management, ISTANBUL MASTER-PLAN, SIMULTANEOUS NITRIFICATION, ENVIRONMENTAL-MODEL, STRATIFIED FLOWS, DENITRIFICATION, QUALITY
  • Istanbul Technical University Affiliated: Yes


The study evaluated pollutant dynamics between The Black Sea and The Marmara Sea using data collected during a marine survey of the region around The Bosphorus strait, in the last five years. A hydraulic model was utilized to define two-layered water exchange in The Bosphorus. Analysis of pollutant exchange indicated The Black Sea as major polluter for the marine environment in The Marmara Sea. Four wastewater outfalls are located along The Bosphorus; Mass balances between the two ends of The Bosphorus indicated losses of 44 t/ d total N and 138 t/d COD in the lower layer before reaching The Black Sea. This was explained with a simultaneous nitrification-denitrification process sustained in the low oxygen or anoxic zones around the outfalls, implying that a sustainable wastewater strategy should preclude additional treatment for The Bosphorus discharges, since they do not have an appreciable impact on the water quality of the lower flow.