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

Banu Tansel Büyükçelebi, Hasan Karabay, Ata Bilgili*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)251-262
Number of pages12
JournalJournal of Environmental Engineering and Landscape Management
Volume29
Issue number3
DOIs
Publication statusPublished - 2 Jun 2021

Bibliographical note

Publisher Copyright:
© 2021 The Author(s).

Funding

We would like to thank the Municipality of the Tuzla District of Istanbul, Turkey, for giving us the opportunity to work on this project and for providing us with the lagoon configuration information and maps. Dr. Daniel R. Lynch (emer., Dartmouth College) is also acknowledged for the use of the numerical model and for his very valuable contributions throughout the years. This work was partly supported by the City of Istanbul Metropolitan Municipality under the “My Project Istanbul” program. The parallel simulations were performed using the clusters at the Istanbul Technical University National High Performance Computing Center through project #1001192011.

FundersFunder number
City of Istanbul Metropolitan Municipality

    Keywords

    • Exchange
    • Lagoon
    • Lagrangian
    • Number of particles
    • Numerical model
    • Particle tracking
    • Residence time
    • Restoration
    • Tuzla
    • Wind

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