Document Type : Research Article
PhD Candidate in Soil Sciences, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran
Associate prof. of Soil Sciences, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran
Soil and Water Research Institute, Agricultural Extension and Education Organization (AREEO), Karaj, Iran
Professor of Soil Sciences, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran.
This research was conducted with the aim of investigating the ecological assessment of Jiroft region under the influence of land use changes. For this purpose, from the satellite image in 1990 (Landsat 5-TM) and 2020 (Landsat 8 -OLI) to extract land surface temperature with the help of single-band algorithm and land use map with the support vector machine (SVM) classification method. used. Next, in order to investigate the role of land cover in the creation of thermal islands, the contribution index (CI) was used and the UTFVI index was used to evaluate the ecological situation. Based on the results, in the year 2020, barren areas had the most change of use compared to the year 1990 (reduction of 7300 hectares). Based on the obtained results, in the year 2020, barren areas had the most change of use compared to the year 1990 (reduction of 7300 hectares). The results showed that in the year 2020, barren areas had the highest land-use change since the year 1990 and decreased by 7,300 hectares, but man-made, agricultural, and irrigated land uses increased the most. In fact, the area of the water area has increased with the construction of the water dam in the region. The reduction of barren areas and the increase of water levels, agricultural use and gardens have improved the ecological situation compared to 1990, while the temperature of the earth's surface has increased by 11 degrees in 2020, which can be attributed to the increase in global warming. According to the results, it can be said that although the ecological situation of the region is in a better state than in 1990, the presence of desert lands and rocky outcrops around Jiroft has caused the formation of thermal islands in the Jiroft region.