Adewara, M.B. and Oyewole, A.M. (2019) Dynamic Effects of Urban Heat Island in Ilaro Town, Yewa South LGA of Ogun, South West Nigeria. IOSR Journal of Environmental Science, Toxicology and Food Technology (IOSR-JESTFT), 13 (12). pp. 52-60. ISSN 2319-2399
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Abstract
There has been tremendous urbanization in the study area from 2000 to 2018. As a result of increasing construction activities there exists an increase in the number of floor plastering, dark colored roofs and buildings. These Pavements, dark-colored roofs, and similar surfaces absorb more sunlight, trap heat, and increase local temperatures. This research used satellite data (Landsat TM, ETM+ and OLI imageries acquired in 2000, 2010 and 2018) to examine the dynamic effect of Urban Heat Island in Ilaro town in Ogun state, Nigeria. Supervised classification algorithm in ENVI was used to classify the images into five land use /land cover classes (built up, bare lands, vegetation and cultivated/mixed vegetation). Landsat 8 OLI, Landsat 7ETM+ and Landsat 5 TM, were used for the LULC mapping and Land Surface Temperature analysis and the result showed that remote sensing images can be used to investigate how the LULC affects the surface temperature of the study area. The surface temperature of the different classes was recorded for each year and the urban thermal field variance index (UTFVI) was applied to measure the thermal comfort level of the city.The study established that there is a significant change in Land use pattern in area between 2000 and 2018, resulting in a gradual increasing rate in mean land surface temperature, LST (>5% per annum). This change in LULC pattern significantly increased the amount of heat emitted in the metropolis with more than 50C increase (9%). It is against this backdrop that proactive steps need be taken to control the menace of rapid rise in LST in Ilaro town, which includes afforestation, preservation of water bodies and reduction of the amount of bare surfaces.
| Item Type: | Article |
|---|---|
| Subjects: | G Geography. Anthropology. Recreation > GE Environmental Sciences |
| Divisions: | Faculty of Engineering, Science and Mathematics > School of Geography |
| Depositing User: | Mr Daniel Kumoye |
| Date Deposited: | 22 Jun 2020 13:29 |
| Last Modified: | 22 Jun 2020 13:29 |
| URI: | http://eprints.federalpolyilaro.edu.ng/id/eprint/726 |
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