Geo-Spatial Dynamics of Land Surface Temperature of Port Harcourt Metropolis and Environs: Implication for Heat Disaster Management
Volume 8, Issue 3, June 2019, Pages: 169-177
Received: May 12, 2019;
Accepted: Jun. 13, 2019;
Published: Jun. 26, 2019
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Nwaerema Peace, Department of Geography and Environmental Management, University of Port Harcourt, Port Harcourt, Nigeria
Temi Emmanuel Ologunorisa, Department of Meteorology and Climate Science, Federal University of Technology, Akure, Nigeria
Moses Okemini Nwagbara, Department of Soil Science and Meteorology, Michael Okpara University of Agriculture, Umuahia, Nigeria
Ojeh Nduka Vincent, Department of Geography, Taraba State University, Jalingo, Nigeria
Since 1986, the rate of expansion of population and urban pavement materials in Port Harcourt metropolis and environs has generated enormous heat capable of causing disaster. This paper examines geo-spatial dynamics of Land Surface Temperature (LST) of Port Harcourt metropolis and environs from 1986 to 2018 using Geographic Information Systems (GIS) approach. To achieve this purpose, satellite data were retrieved and analyzed using the algorithm for extracting LST from Landsat 5, 7 and 8 thermal infrared sensor sources from the Google Earth Engine (GEE). The results indicate that in 1986, LST concentrated on the south-western (Bakana) and north-eastern (Oyigbo) sections of the city with temperature range of 19.27°C and 30.17°C having population of 757,022 persons. In 2003, LST concentrated on the city centre, south-western (Bakana) and north-western (Rumuekeni) segments with temperature range of 16.14°C and 34.19°C having population of 1,143,103 persons respectively. Also, in 2018 LST shifted its concentration to north-eastern and south-eastern segments of the city with a variation of 21.6°C and 35.31°C having population of 3,095,342 persons expected to experience heat related ailments such as heat stroke. The city has compromised the standard human comfort threshold of 27°C. It is recommended that there should be immediate urban greening of tree planting, de-congestion of development activities from the eastern segment of Port Harcourt city to the western segment as well as practical implementation of urban management plan without further delay.
Temi Emmanuel Ologunorisa,
Moses Okemini Nwagbara,
Ojeh Nduka Vincent,
Geo-Spatial Dynamics of Land Surface Temperature of Port Harcourt Metropolis and Environs: Implication for Heat Disaster Management, Earth Sciences.
Vol. 8, No. 3,
2019, pp. 169-177.
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