Exchange characteristics of an anthropogenically modified lagoon: an Eulerian-Lagrangian modeling case study with an emphasis on the number of particles

Journal of Environmental Engineering and Landscape Management

Hasan Karabay¹  Ata Bilgili²  Banu Tansel Büyükçelebi² 

[1] Department of Mechanical Engineering, Kocaeli University Umuttepe Yerleşkesi, 41380 Kocaeli, Turkey;Maritime Faculty, Istanbul Technical University, Tuzla, 34940 Istanbul, Turkey;

关键词: particle tracking;    number of particles;    lagrangian;    exchange;    residence time;    wind;    restoration;    lagoon;    numerical model;    tuzla;   

DOI  :  10.3846/jeelm.2021.15237

来源: DOAJ

【 摘 要 】

The transport pathways and exchange characteristics of the Kamil Abdüş Lagoon in Istanbul, Turkey, are simulated using a finite element model with a Lagrangian particle tracking module. The lagoon is in the process of being reconfigured. The simulations are performed using a draft configuration. The effect of winds and the number of particles on the e-folding time is simulated. Results show that the lagoon is strongly dominated by winds with a correlation coefficient of 0.897 between the wind and residual current magnitudes. The lagoon e-folds in 9.1 days under realistic winds and in 14.3 days when there is no wind with confidence levels of 5%. The Lagrangian study uses six simulations with particle numbers ranging between 65073 and 2730486. A methodology based on confidence levels is proposed. It is observed that approximately 784 000 particles are necessary to obtain 5% level of confidence. With a problematic history and new planning options, the lagoon has a potential to be used as an example setting, all-field study ground for anthropogenically engineered coastal ecosystems.

【 授权许可】

Unknown