Document Type : Original Article

Authors

• Saeed Behzad ¹
• Parsa Afzali Kordmahalleh ²

¹ Associate Professor, Department of Surveying Engineering, Faculty of Civil, Water and Environmental Engineering, Shahid Beheshti University, Tehran, Iran

² Master student of surveying Engineering department, Shahid Rajaei Teacher Training University

Abstract

Today, air pollution has become a serious problem in human societies. One of the appropriate methods for better management in dealing with this destructive environmental phenomenon is to monitor and investigate the pollution trend using modern technologies, including satellite images. In this study, the production of a seasonal map and the investigation of pollution trends of carbon monoxide (CO), nitrogen dioxide (NO2), methane (CH4), and sulfur dioxide (SO2) are targeted. The study area FOR producing a pollution map is Iran in Southwest Asia. Also, the data used are related to Sentinel 5 satellite images. By creating a model and using special bands, the seasonal pollution map of Iran is produced. In the following, a point in the city of Tehran was considered to analyze the pollution trend. By creating a function in Google Earth Engine, the graph of 1402 related to CO, NO2, CH4, and pollutants is drawn. The results of these two parts show that the amount of pollution in winter is higher than in other seasons. Some areas, especially on the coasts of the Persian Gulf and the Caspian Sea, are dangerous in terms of the presence of CO in all 4 seasons of the year. NO2 reporting is hazardous in metropolitan areas throughout the year. Ch4 maps are almost neutral. On the other hand, partial SO2 and NO2 are seen more in industrial and densely populated areas. The graphs also show that the trend of CO, NO2, and SO2 pollution increases drastically in the second half of the year.

Keywords

• Pollution
• remote sensing
• Google Earth Engine
• satellite images

Main Subjects

• Remote sensing and Gis