3D Numerical Modeling of Exchange Flows in Golden Horn Estuary

Tarkan Erdik*, Olgay Sen, Izzet Öztürk

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The Golden Horn estuary (GH) is a historic inlet in the northwest direction of the Bosphorus. It is a unique region that has valuable biological resources and provides living space for a wide variety of organisms. The GH suffers symptoms of poor circulation because of low river discharges upstream. Mixing by tidal or wind stress is also negligible in the estuary. Water exchange via the Bosphorus is the main factor that controls the circulation. In this study, a three-dimensional (3D) hydrodynamic model was set up and calibrated to predict the exchange flows between the waters of the Bosphorus and the eastern part of the GH. The numerical model was simulated for 2 months, January and August, which correspond to the extreme and gentle flow regimes, respectively. The mean negative and positive exchange flows were calculated. In addition, the influence of various driving forces on GH circulation was investigated using the calibrated 3D hydrodynamic model. The results show that the difference in water-surface elevation between the Marmara Sea and the Black Sea and the density-driven circulation account for almost 80% of the exchange flows in the GH. An attempt to estimate the residence time (τ) characteristics in the GH was also made using a 3D numerical model and a simplified box model, and the results were compared.

Orijinal dilİngilizce
Makale numarası04019018
DergiJournal of Waterway, Port, Coastal and Ocean Engineering
Basın numarası5
Yayın durumuYayınlandı - 1 Eyl 2019

Bibliyografik not

Publisher Copyright:
© 2019 American Society of Civil Engineers.


This research was supported by the IBB, Department of Environmental Protection and Development. The authors sincerely thank Prof. Dr. Fuat Alarçin, Ali Eker, Suat Biçer, Saffet Altindag, and Baris Görmezoglu of the IBB for their kind support in developing this research, which will help in water-quality improvement of the GH. The authors also thank all reviewers for their constructive comments that have resulted in the great improvement of this article.

FinansörlerFinansör numarası
Department of Environmental Protection and Development
Institute for Bioengineering and Biosciences

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