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Mustafa Yücel Evrim Kalkan Tezcan, et al.,

Figure 4. Surface fluorescence distribution by the end of March / beginning of April
2022 (ÇŞİB, ODTÜ-DBE, 2022: 203).

Figure 5. Surface salinity distribution by the end of March / beginning of April 2022
(ÇŞİB, ODTÜ-DBE, 2022: 203).

General Evaluation During and After Mucilage Event: Towards a New Deci-
sion Support System with Marmara Digital Twin
The Marmara Sea, especially since the beginning of 1980s, the Marmara
Region basin has been under the direct pressure of rapid urbanization, getting
highly dense on the coastal areas, as well as the waste waters generated
by the increasing industrial activities. Although fed by the oxygen-rich
Mediterranean waters; sharp halocline that is formed as a result of the strong
density difference between the surface and deep layers, restricts the oxygen
flow from surface to the lower layer during the spring-autumn in particular.
The mucilage outbreak, degradation of mucilage residues and elimination
process in the Marmara Sea seems to have made a change in the dynamics of
this sea beyond seasonal changes. The mucilage was detected from surface
to the halocline layer (0-25m) in the Marmara Sea in June-July 2021 with

98 Journal of Environment, Urbanization and Climate