Influence of Floating Structures on Tide- and Wind-Driven Hydrodynamics of a Highly Populated Marina
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 146, Issue 2
Abstract
Harbor siltation is a problem that will exist as long as harbors exist and it is intrinsically linked to their primary function: providing shelter for anchorage and operative conditions for loading and unloading ships. In these semienclosed basins, flow characteristics are one of the main factors influencing siltation and water quality. One of the largest recreational ports of Europe, La Rochelle Marina (southwestern France), is not spared by siltation, which requires serious dredging operations during a major part of the year. In this context, a three-dimensional model has been used to investigate its hydrodynamics. Using a simplified approach, floating structures were implemented in the model. Comparison with observations has demonstrated the need to consider these structures in our study. They significantly reduce velocity in the inner parts of the marina and concentrate current on access channels. Numerical results also highlight the joint role of the macrotidal regime and wind stress in the movement of water masses and their residual circulation.
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Data Availability Statement
Some observed and simulated data generated and used during the study are available from the corresponding author by request (simulated and observed water level obtained in 2017 and currents obtained in 2018). The code used during this study is available in a repository online in accordance with funder data retention policies (http://www.opentelemac.org/). Some data used during the study are proprietary or confidential in nature and may only be provided with restrictions (CREOCEAN is the owner of the observed currents data obtained in 2014). Direct requests for these materials may be made to the provider as indicated in the “Acknowledgments.” Some data, models, or code used during the study were provided by a third party [atmospheric data provided by National Center for Environmental Prediction (NCEP), offshore water levels provided by SHOM, bathymetric data provided by SHOM without restrictions]. Direct requests for these materials may be made to the provider as indicated in the “Acknowledgments.”
Acknowledgments
This work was funded by Région Nouvelle-Aquitaine, La Rochelle Marina, and the Contrat Plan Etat Région (CPER) DYPOMAR. The developing team of TELEMAC is warmly acknowledged for making its code available and providing useful discussion. Water level data originate from the REFMAR network (SHOM) and the atmospheric forcing was provided by the National Center for Environmental Prediction (NCEP). We also thank Centre National de la Recherche Scientifique (CNRS) and La Rochelle Université for their support, and Xavier Bertin for the review and helpful advice.
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Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 146 • Issue 2 • March 2020
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©2019 American Society of Civil Engineers.
History
Received: Dec 20, 2018
Accepted: Jul 1, 2019
Published online: Dec 8, 2019
Published in print: Mar 1, 2020
Discussion open until: May 8, 2020
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