The site selection of heat islands and its adaptation to satellite imagery based on the TOPSIS model in Mashhad
In recent years with the development of cities coatings of the Earth's has changed surface. These changes have caused some urban areas to have a few degrees higher than the surrounding temperature. This phenomenon is known as thermal islands. Mashhad is one of the major metropolises in Iran wi...
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Kharazmi University
2020-03-01
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| Series: | تحقیقات کاربردی علوم جغرافیایی |
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| Online Access: | http://jgs.khu.ac.ir/article-1-3081-en.pdf |
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| author | Mokhtar Karami, Rahman Zandi, jalal taheri |
| author_facet | Mokhtar Karami, Rahman Zandi, jalal taheri |
| author_sort | Mokhtar Karami, |
| collection | DOAJ |
| description | In recent years with the development of cities coatings of the Earth's has changed surface. These changes have caused some urban areas to have a few degrees higher than the surrounding temperature. This phenomenon is known as thermal islands. Mashhad is one of the major metropolises in Iran with the problem of thermal islands. Various parameters affect the formation of thermal islands in this city that should be considered. In this study TM, ETM+ and OLI images were used to obtain surface temperature over the period 1987-2016. The study of temporal variations in surface temperature showed that in the studied period, thermal islands were transferred from outside the city to the city. The model for describing the temperature of the surface of the earth has changed and has diminished from the temperature of the city's moderate and cool temperatures, and in contrast, the amount of high temperatures (thermal islands) has increased significantly. The TOPSIS method was also used to obtain the thermal forming factors. 13 natural and human factors affecting the formation of thermal islands were identified. Each expert opinion factor was used to determine the degree of importance. According to experts, the distance from the sanctuary with a weight of %234 and traffic of %155 is the most important and the height with a weight of %022 is least important in the formation of thermal islands. The final results obtained from this model showed that the factors affecting the formation of thermal islands are well recognized and the temperature decreases with these factors. |
| format | Article |
| id | doaj-art-f9a34976240a4ec7af7e84131e8df563 |
| institution | Kabale University |
| issn | 2228-7736 2588-5138 |
| language | fas |
| publishDate | 2020-03-01 |
| publisher | Kharazmi University |
| record_format | Article |
| series | تحقیقات کاربردی علوم جغرافیایی |
| spelling | doaj-art-f9a34976240a4ec7af7e84131e8df5632025-01-31T17:26:35ZfasKharazmi Universityتحقیقات کاربردی علوم جغرافیایی2228-77362588-51382020-03-0120567592The site selection of heat islands and its adaptation to satellite imagery based on the TOPSIS model in MashhadMokhtar Karami,0Rahman Zandi,1jalal taheri2 - - - In recent years with the development of cities coatings of the Earth's has changed surface. These changes have caused some urban areas to have a few degrees higher than the surrounding temperature. This phenomenon is known as thermal islands. Mashhad is one of the major metropolises in Iran with the problem of thermal islands. Various parameters affect the formation of thermal islands in this city that should be considered. In this study TM, ETM+ and OLI images were used to obtain surface temperature over the period 1987-2016. The study of temporal variations in surface temperature showed that in the studied period, thermal islands were transferred from outside the city to the city. The model for describing the temperature of the surface of the earth has changed and has diminished from the temperature of the city's moderate and cool temperatures, and in contrast, the amount of high temperatures (thermal islands) has increased significantly. The TOPSIS method was also used to obtain the thermal forming factors. 13 natural and human factors affecting the formation of thermal islands were identified. Each expert opinion factor was used to determine the degree of importance. According to experts, the distance from the sanctuary with a weight of %234 and traffic of %155 is the most important and the height with a weight of %022 is least important in the formation of thermal islands. The final results obtained from this model showed that the factors affecting the formation of thermal islands are well recognized and the temperature decreases with these factors.http://jgs.khu.ac.ir/article-1-3081-en.pdfthermal islandslandsat satelliteearth surface temperature (lst)topsis modelmashhad city. |
| spellingShingle | Mokhtar Karami, Rahman Zandi, jalal taheri The site selection of heat islands and its adaptation to satellite imagery based on the TOPSIS model in Mashhad تحقیقات کاربردی علوم جغرافیایی thermal islands landsat satellite earth surface temperature (lst) topsis model mashhad city. |
| title | The site selection of heat islands and its adaptation to satellite imagery based on the TOPSIS model in Mashhad |
| title_full | The site selection of heat islands and its adaptation to satellite imagery based on the TOPSIS model in Mashhad |
| title_fullStr | The site selection of heat islands and its adaptation to satellite imagery based on the TOPSIS model in Mashhad |
| title_full_unstemmed | The site selection of heat islands and its adaptation to satellite imagery based on the TOPSIS model in Mashhad |
| title_short | The site selection of heat islands and its adaptation to satellite imagery based on the TOPSIS model in Mashhad |
| title_sort | site selection of heat islands and its adaptation to satellite imagery based on the topsis model in mashhad |
| topic | thermal islands landsat satellite earth surface temperature (lst) topsis model mashhad city. |
| url | http://jgs.khu.ac.ir/article-1-3081-en.pdf |
| work_keys_str_mv | AT mokhtarkarami thesiteselectionofheatislandsanditsadaptationtosatelliteimagerybasedonthetopsismodelinmashhad AT rahmanzandi thesiteselectionofheatislandsanditsadaptationtosatelliteimagerybasedonthetopsismodelinmashhad AT jalaltaheri thesiteselectionofheatislandsanditsadaptationtosatelliteimagerybasedonthetopsismodelinmashhad AT mokhtarkarami siteselectionofheatislandsanditsadaptationtosatelliteimagerybasedonthetopsismodelinmashhad AT rahmanzandi siteselectionofheatislandsanditsadaptationtosatelliteimagerybasedonthetopsismodelinmashhad AT jalaltaheri siteselectionofheatislandsanditsadaptationtosatelliteimagerybasedonthetopsismodelinmashhad |