|CWR Presents : Numerical modeling of the Long-term transport, dispersion, and accumulation of Black Sea Pollutants into the North Aegean coastal waters.
The present ecological situation of the Black Sea in relation to increased shipping from ports in the Black Sea, the prospect of considerably high tanker traffic carrying Caspian and Central Asian oil through the Aegean and the excessive loads of nutrients and other harmful substances flowing from rivers such as Danube, Dniper and Dnister has generated fears in Greece and Turkey, as well as among environmentalists throughout the world, of still more acute threats to the ecosystem and cleanliness of the Aegean Sea.
A numerical simulation of the surface buoyant mega plume that is formed from the Black Sea brackish water discharge into the North Aegean Sea, through the Dardanelles Straits, has been performed using the ELCOM hydrodynamic model after validation with laboratory model results and available field and remote sensing data. Important climatological factors, such as air temperature, relative humidity, wind speed, wind direction, solar radiation, atmospheric pressure and rainfall that affect the water circulation in North Aegean as well as the Coriolis force effect, are taken into account. The choice of the 3D hydrodynamic model ELCOM was made due to its advanced ability to monitor and predict the Black Sea pollutants that outflow in the North Aegean Sea using passive non-dimensional computational tracers.
The simulation was conducted for a total flow time of 16 years. Suitable tracers are introduced in order to predict the long term fate and distribution of pollutants that are transported from the Black sea into the North Aegean. The overall results of the present investigation indicate that the BSP concentration is very high at the coastal waters of Thassos, Samothraki, and Limnos islands, as well as along the mainland coastal waters between Alexandroupolis and Strymonikos Gulf, during summer and autumn when strong water column stratification occurs. In general, the BSP concentration in the North Aegean surface waters reaches considerable high values (47– 58 % of the initial pollutant concentration at Dardanelles outflow) within 16 years. Even for depths more than 500 m the BSP concentration is still remarkable, slightly increasing with time. The increase of the BSP concentration with respect to time at various depths (from free surface up to 750 m) was also investigated.
Kyriakos received the BEng Degree of Civil Engineering in 2000 and the MSc Degree in Concrete Technology, Construction and Management in 2002 from the Department of Civil Engineering at Dundee University in Scotland. He then received his MSc Degree in Hydraulic Mechanics in 2007 and his Ph.D. Degree in 2012 from the Department of Civil Engineering at Democritus University of Thrace in Greece. He is currently working as a researcher at Democritus University of Thrace and he is member of the Technical Chamber of Greece (TEE) and the ECRR (European Center for River Restoration).
His research interests are mainly in the area of Environmental Fluid Mechanics, CFD Modelling, Experimental Modelling and Physical and Chemical Oceanography and Limnology.
PS* This seminar is free and open to the public & no RSVP required.
Dr.Kyriakos Kopasakis,School of Engineering-Democritus University of Thrace Greece
Blakers Lecture Room, Ground Floor, Mathematics Building, The University of Western Australia
: 6488 7565
Wed, 14 Nov 2012 16:00
Wed, 14 Nov 2012 17:00
Askale Abebe <[email protected]>
Tue, 12 Mar 2013 16:55
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