ESTIMATING AIR POLLUTION QUALITY IN ISTANBUL CITY CENTRE BY GEOGRAPHIC INFORMATION SYSTEM

Air pollution in urban areas comes from a wide variety of sources, including industries, motor vehicles, and in winter due to use of poor quality coal for heating. Istanbul, which is the largest and most populated urban area, and the centre of industry, economics, finance and culture in Turkey, these causing increasing the atmospheric pollution in Istanbul, coal dominated energy structure is also one of the major causes of air pollution in this city. A study involving 28 stations in Istanbul city, monthly average of PM10, SO2, NO2, NO, NOx, CO and O-3 for 2015 was collected from the Government air quality measurement network, the data were interpolated using a geographic information system by IDW technique for each pollutant according to capability of GIS among air pollution modelling, where built model for average of pollutants for winter and summer seasons. The spatial and temporal results showed that PM10, NO and NOx concentrations increased in the winter because of heating coal, and in an industrial, and non-green areas such as Esenyurt, Yenibosna, Selimiye, Aksaray, Umraniye, atladikapi and Kagithane, and not within the Air Quality Index (AQI) of Turkey, while NO2 increased in summer (These gases form when fuel is burned at high temperatures, and come principally from motor vehicle exhaust and stationary sources such as electric utilities and industrial boilers). While concentrations of ozone, CO and SO2 did not reveal any significant change throughout the whole studied period.