Document Type : Original Article
Authors
1
Associate Professor of Geography and Urban Planning, Shahid Bahonar University of Kerman, Kerman, Iran
2
Bahonar University of Kerman
3
Master of Geography and Urban Planning, Shahid Bahonar University of Kerman, Kerman, Iran.
10.48306/jgrs.2025.511967.1012
Abstract
Today, population growth and economic development are the main drivers of land use and land cover changes worldwide, and these changes have been more pronounced in urban environments than in other regions. One of the effects of this land use change is manifested in the urban climate, in a way that warmer cities have made human comfort and life difficult. Urban heating has been manifested under titles such as urban heat islands in the world; therefore, investigating the distribution of heat islands and its relationship with the type of land use is important in understanding urban microclimate. In the city of Assaluyeh, due to the creation and development of industrial uses, including various refineries in the oil, gas, and petrochemical sectors, changes in its microclimate are observed, which has caused environmental problems. One of these changes is the emergence of urban heat islands in this city. The distribution of these islands in the city of Assaluyeh and its peripheral lands (Asaluyeh Port) has been investigated in relation to land use and cover in this study. For this purpose, Landsat 7 and 8 images were used on 2000.04.15, 2010.04.11 and 2020.04.14. In addition, surface temperature maps, Normalized Difference vegetation index (NDVI), Normalized Difference built-up area index (NDBI), and land use map were prepared. According to surface temperature maps prepared from 2000 to 2020, the expansion of industrial-workshop areas and their establishment in urban areas has led to the creation of hard surfaces such as asphalt, roads for heavy machinery, and the increased use of concrete and bricks. The increase in these levels has consequences such as land use changes, increased temperatures in that area and the formation of heat islands, increased NDBI, and decreased NDVI due to reduced space for vegetation. This phenomenon in the city of Assaluyeh is dependent on two uses, including urban use and industrial areas, which have a positive relationship and in these areas the temperature has increased compared to barren lands; also, in areas with vegetation and coastal areas, the temperature has decreased and has a negative relationship with the heat island.
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