Site Suitability Analysis for Waste Disposal in Kano Metropolis, Nigeria (Using Multi-Criteria Evaluation, AHP, and GIS Techniques) [ ]


In Nigeria, Landfill is one of the most important method of managing Municipal Solid Waste (MSW). The landfill remains the last option for the disposal of waste in developing countries including Nigeria. This study was based on site selection for Municipal Solid Waste dumpsite in Kano Metropolis (Nigeria) using multi-criteria evaluation, AHP, remote sensing and GIS techniques. Eleven criteria were used for the study. This criteria were classified in to two: the constraint criteria (major road, airport, railroad, river, dumpsite, and a border). While the factor criteria involves population, advance road, soil, slope and land use. The study was divided in to three phase. In the first phase the constraint criteria were standardize using Boolean logic, a score of 0 was assigned to the restricted area, while 1 to unrestricted area. Then all the five criteria were overlaid to generate a restriction map. For the second phase, factor criteria were standardize using fuzzy membership, with a range of numbers from 0 –1. The factor criteria were then weighted using AHP and then overlaid, to get a suitability map. The final phase combine the result of the first and second phase to get most suitable sites for landfill. The result revealed five different sites; the Unsuitable site occupy 324 km2 (65%), Poorly suitable site covers 30 km2 (6%), the Moderately suitable site covers only 5km2 (1%) and then Suitable site covers 6% (30km2). Finally the Most suitable site for the waste disposal covers 110 km2 (22%) out of the total area of 499km2.