| Modelling Tropospheric Ozone Concentration In The Atmosphere Of Istanbul By Artificial Neural Network Methods
It is known that emission of fossil fuels and motor vehicles are causing ozone formation. Ozone pollution forms a potential risk for human and living things in Istanbul and surrounding, which involves significant amount of industry and motor vehicles.
Ozone is a secondary pollutant which is formed as a result of photochemical reactions of primary pollutants like hydrocarbons and nitrogen oxides under solar radiation. After formation, ozone diffuses to the troposphere that is near to the Earth’ s surface.
In this research, tropospheric ozone concentration which is an important air pollutant for Istanbul is modeled using with artificial neural networks (ANN). For the formation of the model, data’s which are taken from ozone measuring stations and Metallurgy General Head Office are used. In the use of multi layer neural network, 3 different pollutant parameters and 8 different meteorological factors are chosen and modeled for Anatolian and European side of Istanbul separately and after one day’s ozone concentration is estimated. Estimated these ozone concentrations are compared with the observed concentrations for examining the performance of the model in the region.
It is observed that correlation factors are taking values about or over 0.50 in estimations of daily average concentrations, when we look at the similar studies on the modelling of the air pollutants with ANN methods in literature.
At the result of the study, with the 0,7295 correlation factor calculated for European side and 0,7310 for Anatolian side shows the successful follow of the calculated ozone concentrations with the observed concentrations during 2003.
SERT Nazmiye Didem ,
Danışman : Prof.Dr. Hulusi BARLAS
Anabilim Dalı : Çevre Mühendisliği Anabilim Dalı
Programı (Varsa) : Çevre Mühendisliği Programı
Mezuniyet Yılı : 2006
Tez Savunma Jürisi : Prof.Dr. Hulusi BARLAS (Danışman)
Prof.Dr. Semiha ARAYICI
Prof.Dr. İsmail BOZ
Doç.Dr. Nilgün BAKLAYA
Doç.Dr. Neşe TÜFEKÇİ
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