Abstract

In Akure South, the accumulation of waste has been steadily increasing due to the rise in industrial and economic activities, posing a significant challenge in solid waste management within the Local Government Area (LGA). The primary aim of this research is to identify the most appropriate approach for assessing landfill suitability, utilizing the weighted overlay technique alongside the analytic hierarchy process (AHP). To achieve this, ASTER Digital Elevation Model, FAO soil data, and Landsat 8 imagery were employed to analyze various factors. The AHP pair-wise comparison module was utilized to assign weights to the factors for both the AHP plugin technique and the weighted overlay method. Careful consideration was given to determining the weights for the weighted overlay technique. Subsequently, a suitability map was generated, categorizing sites into highly suitable, suitable, moderately suitable, less suitable, and unsuitable. The findings reveal that the most suitable landfill sites are predominantly located in the south-east and north-west regions of Akure South LGA. Furthermore, this study advocates for the adoption of the AHP plugin technique as it proves to be more efficient in identifying the most suitable sites, thus enhancing the effectiveness of landfill management in the area.

Key Words: Landfill, Weighted overlay, Analytical Hierarchical Process, GIS