Assessment of Landfill Site Suitability in Ijebu-Ode Local Government Area, using Geospatial Techniques

Abstract

Landfills have been regarded as an effective waste disposal method. This study aims at determining the most suitable sites for siting landfills in Ijebu Ode Local Government Area of Ogun State. The spatial distribution of current open dumpsites were determined. Five factors of landfill suitability selection used in this study are: soil, distance from road networks, slope, elevation, geology, and land use/land cover. This study uses a combination of Weighted Linear Combination (WLC) and GIS technology to produce maps of each of the landfill suitability selection factors. By combining the criteria weights produced by the suitability modeller technique, the suitability of the existing landfills were determined and the best location for landfill sites were identified. According to the survey, 13.36% of the region is classified as unsuitable, 4.81% as fairly suitable, 30.64% as moderately suitable, and only 0.1% as highly suitable.