Document Type: ORIGINAL RESEARCH PAPER

Authors

1 Department of Environmental Management and Toxicology, College of Natural and Applied Sciences, Western Delta University, Oghara, Delta State, Nigeria

2 Centre for Landscape Ecology and GIS University of Greenwich, Faculty of Engineering and Science, Central Avenue Chatham Maritime, Kent, UK

Abstract

The rapid growth in urban population is seen to create a need for the development of more urban infrastructures. In order to meet this need, natural surfaces such as vegetation are been replaced with non-vegetated surfaces such as asphalt and bricks which has the ability to absorb heat and release it later. This change in land cover is seen to increase the land surface temperature. Previous studies have tried to explain the impact of land cover changes on the land surface temperature. However, there is a growing need to spatially quantify the extent to which temperature has increased so as to identify areas where immediate mitigation measures can be introduced. In view of this, this study has incorporated remotely sensed Landsat data with remote sensing techniques in order to effectively quantify the spatial extent of urban growth and its impact on the land surface temperature in Lagos, Nigeria. The result shows that there have been changes in the land cover which has increased the land surface temperature between 2002 and 2013. Overall, there was an increase in the highly dense areas, moderately dense areas and less dense areas by 3.35% (2200.77 ha), 27.87% (13681.35 ha), 6.20% (3284.01 ha) and a corresponding increase in the mean land surface temperature of these urban areas by 3.8 oC, 4.2 oC and 2.2 oC. Hence, it was recommended that in order to reduce the land surface temperature of urban areas, sustainable urban planning strategies that include increasing the vegetated areas and embracing other green initiatives such as urban forestry should be adopted. 

Graphical Abstract

Highlights

  • The Linear mixture model was seen to be suitable in helping to quantify the true nature of the land surface temperature.
  • The densely vegetated areas present in 2002 have been cleared in order to give way for more urban infrastructures such as buildings and roads.
  • It is evident from the results that the increase in land surface temperature is as a result of the increase in various heat absorbing land surface features.
  • The results of the correlation and regression reveal that non-vegetated areas have a positive influence on the overall increase in the temperatures of urban areas. 

Keywords

Main Subjects

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HOW TO CITE THIS ARTICLE

Igun, E.; Williams, M., (2018). Impact of urban land cover change on land surface temperature. Global J. Environ. Sci. Manage., 4(1): 47-58 (12 pages).


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