Effect of urban construction on the temperature of the earth's surface (case study: Sahand New City)

Subject Areas :

Firouz jafaria ¹ , shiva sattarzadeh ²

1 - Faculty of Tabriz University
2 - Master of Geography and Urban Planning, Tabriz University, Tabriz, Iran

Received: 2022-10-05 Accepted : 2022-12-21 Published : 2022-11-22

Keywords: land use, Landsat, Land surface temperature, built-up areas, 7 New Sahand city,

Abstract :

Following the increase in population and the growth of urbanization in recent decades, natural landscapes are being transformed into human landscapes and urban open spaces are being transformed into built-up areas. The purpose of this research is the changes made in urban constructions and the excessive increase of buildings and their relationship with the surface temperature of the earth using Landsat satellite from 2005 to 2020 for the new city of Sahand. The current research is applied in terms of purpose and descriptive-analytical in terms of method, and Global Human Settlement, Built-Up (GHSL) layers related to Landsat images of OLI/TIRS sensor in Google Earth Engine system have been used. The best results for the index of built-up complications were obtained with an accuracy rate of 79.97%, which was considered as the best method for extracting construction phenomena. While in 2010, it shows 45.32%, and the lowest rate of construction development is related to 2005, which showed 16.98%. The highest average air temperature for the LST image from 2010 to 2020 shows more than 16 degrees. In this year, the highest air temperature on the surface of the earth has coincided with the peripheral areas, built buildings and the northwestern parts of the new city of Sahand.