A GIS-based analysis for sanitary landfill sites in Abuja, Nigeria
The absence of sanitary landfill in Abuja, Nigeria has been a challenge that needs the full attention of the authorities. The improper disposal of municipal solid waste (MSW) on open land is a burden to the government due to the health implications and the socioeconomic issues associated with it. In order to mitigate environmental degradation, health risk concern and public vexation, the study aims at identifying suitable sites for MSW disposal in Abuja Municipal Area Council and Bwari area council of Abuja which meets global specification and standards. The integration of Geospatial data: Landsat-7ETM+, NigeriaSat-X, ASTER-GDEM, base map, soil and geology maps and multi-criteria evaluation, was used to evaluate the relative importance of each criterion in the study. Each map layers were formed by using the spatial analysis potential of the ArcGIS10.1 software and final suitability map was created using the weighted overlay analysis. The results of the analysis identified six potential sites for sanitary landfill; however four out of the six sites were considered due to the land area size of the sites and its non-intersection with the Abuja land use plan. Also, results showed that none of the existing MSW disposal sites met the global standards considered. In view of the ecological and environmental challenges regarding MSW disposal sites in Abuja, this study shows that GIS is an effective tool in MSW management, which will assist decision makers to plan appropriately toward achieving an aesthetic, healthy and sustainable environment.
KeywordsDumpsite GIS Multi-criteria evaluation Municipal solid waste Sanitary landfill
We wish to express our appreciation to the Head of Department of Geosciences, Environment and Spatial Planning, Faculty of Sciences, University of Porto, Portugal for his continuous support and encouragement. Also, we appreciate the Petroleum Technology Development Fund (PTDF) for their genuine support. Our appreciation also goes to Dr Ganiy I. Agbaje; Director/Chief Executive at African Regional Centre for Space Science &Technology Education-English (ARCSSTE-E), Ile Ife, Nigeria and Dr Shaba A. Halilu; Director, Strategic Space Applications, NASRDA, Abuja, Nigeria for their contribution and support.
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