Investigating urban heat islands in relation to land use ( case study Sanandaj)

Document Type : Original Article


Firozabad Higher University



Increasing population growth (including natural increase and migration) and rapid industrial growth is one of the main causes of climate change in the world.  Today, the most important problem in urban areas is the increase in the temperature of the earth's surface due to changes in natural levels. In urban areas, depending on the type of land use and vegetation, there are areas with different temperatures from other areas.  In this research, in order to answer how the types of urban uses affect the creation of high temperature areas and with the aim of knowing the temperature difference of different areas of the city and the surrounding suburbs in order to prepare a map of the heat island area in Sanandaj city, the amount of emissivity and the temperature of the ground surface in the city.  Sanandaj was estimated using Landsat 8 satellite data using the Jenks method in summer and autumn. For this purpose, Arc GIS and Envi software were used, and finally, the surface temperature changes obtained were evaluated according to the types of land uses, and the role of each land use in creating the land surface temperature was determined.  The results of the research showed that barren, industrial and urban facilities have the highest temperature and commercial uses and green spaces have the lowest temperature, as a result, it determined the effect of urban uses on the emergence of the current thermal conditions of Sanandaj city, which shows the relationship between the type of use and the level of surface temperature.