Abstract
Abstract. The research objective is the detection of the mechanism of the water mass exchange through a navigational channel connecting two adjacent coastal basins. The research involves the application of a mathematical model in parallel to in-situ measurements. The hydrodynamic circulation in the greater area of the NW Aegean Sea is modeled by means of a barotropic circulation model. Wind, Coriolis and Tide are the main forcings taken into account. The flow through the channel is resolved at a subgrid scale by means of a local open channel flow model. The comparison between field measurements, recorded during a limited period, and the model results supports the model verification. The study is integrated by an operational application of the model under various realistic forcings. The results help to gain a better understanding of the mechanisms regulating the water mass exchange and the consequent interaction between two adjacent connected coastal basins. From the case study of the Potidea channel it is revealed that the water mass exchange under mean wind forcing is of the same order as the one induced by the tidal forcing.
Highlights
Two adjacent coastal basins, connected through a navigational channel, form a dynamical system characterized by mutual water and particulate matter exchange and intermixing
The objective of this paper is to present a procedure for the study of the water mass exchange that takes place through a navigational channel connecting two adjacent coastal basins
Based on the verified prognostic ability of the modelling efforts, the study is integrated through the model application for various wind forcings over the extended area of the two gulfs
Summary
Two adjacent coastal basins, connected through a navigational channel, form a dynamical system characterized by mutual water and particulate matter exchange and intermixing. The objective of this paper is to present a procedure for the study of the water mass exchange that takes place through a navigational channel connecting two adjacent coastal basins. This water mass transport may influence the water quality of the two adjacent gulfs and is related to the depositional problems of a channel, due to transport of suspended sediments, which is a very serious issue for the navigation through a channel. The water mass exchange through the Potidea Channel, connecting the Toroneos and Thermaikos Gulfs, in the North Aegean Sea, (East Mediterranean Sea) is studied in detail for the first time, by the use of mathematical modelling combined with field measurements The two gulfs are depicted in Fig. 1, which shows the whole area and the bathymetry of the North Aegean Sea
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