Mapping Urban Heat Island Areas in Ibadan

Feyi Oni; Uwadiegwu Ibeabuchi

doi:10.54060/jmss.2023.25

Authors

Feyi Oni Department of Geography, Faculty of Social Science, University of Lagos, Lagos-Nigeria
Uwadiegwu Ibeabuchi Department of Geography, Faculty of Social Science, University of Lagos, Lagos-Nigeria

DOI:

https://doi.org/10.54060/jmss.2023.25

Keywords:

Urban Heat Island, Land Surface Temperature, Land Use Land Cover, Normalized Difference Vegetation Index

Abstract

Today, across the world many urban areas are experiencing higher temperatures compared to their surrounding rural areas; this difference in temperature is known as Urban Heat Island (UHI). UHI has created temperature hotspots in our urban centers which are known as UHI areas. This study maps Urban Heat Island areas in Ibadan using remotely sensed data for 1984, 2000 and 2011. Land Surface Tempera-ture (LST) and land use land cover characteristics of Ibadan urban were examined. Normalized Difference Vegetation Index (NDVI) was computed for the study area. Correlation analysis was performed, and the results reveals that a negative rela-tionship exist between LST and NDVI. Urban Heat Island (UHI) areas were defined using the land use land cover and LST for 1984, 2000 and 2011. The result further reveals that to map UHI areas, maximum LST and LULC conventionally regarded as UHI areas should be used, such as: high density residential areas, commer-cial/industrial area, and public/educational institution. The result presents an objec-tive approach adopted to give us a detailed view of places that fall under UHI areas and account for their change through the study years. Based on findings, possible mitigation measures as means of controlling the menace of UHI were highlighted for the study area.

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