Sanitary Landfill Sitting Using Geo-Spatial and Geoscience Investigations in Parts of Southwestern Kwara State, Nigeria
- September 18, 2020
- Posted by: RSIS Team
- Categories: IJRIAS, Surveying and Geoinformatics
International Journal of Research and Innovation in Applied Science (IJRIAS) | Volume V, Issue III, January 2020 | ISSN 2454–6186
Akinrinmade, A.O*1, Olasehinde, P.I.2, Awojobi, M.O.1, Olasehinde, D.A.3, Ige, O.O.4, Olatunji, J.A.1 and Ibrahim, K.O4
1 Department of Geology and Mineral Sciences, Kwara State University, Malate, Nigeria
²Department of Geophysics, University of Ilorin, Ilorin, Kwara State, Nigeria
³ Department of Agricultural and Biosytems Engineering, Landmark University, Kwara State, Nigeria
4 Department of Geology and Mineral Sciences, University of Ilorin, Ilorin, Nigeria
*Corresponding author
Abstract: – Africa population growth rate is the highest among the regions of the world, especially in the urban areas. This also brings about increase in waste generation, notably is also the corresponding increase in waste disposal sites. Hence, the urgent need to develop means of safe waste disposal. Engineered sanitary landfill are designed to be environmentally friendly on a long term. However, several salient considerations, starting from proper sitting must be taken to ensure that it means its purpose. This study is aimed at determination of appropriate landfill sites employing a multi criteria analysis. The study area falls within latitude 8°44’6”N and 7°59’40”N and Longitudes 4°09’40”E and 5°14’8”E all within the basement complex of Nigeria. Prescribed sites for appropriate landfill areas for Jimba, Ijagbo and Omu Aran were investigated using geophysics, geotechnical and Geographic Information System (GIS) techniques as tools to aid the decision-making processes. The geoelectric sections displayed four lithological successions (top soil, latheritic clay, clayey soil and weathered to fresh basement). In the same light, Aeromagnetic survey lineament data indicate no major fault in the area. The particle size distribution curve showed presence of sandy CLAY (SC/CL) and gravelly SAND (GP/SP) soil in the area. The soils liquid limit ranges between 28% to 44%, while plasticity index ranged between 11% to 36%. The clay activity values range between 0.28 to 0.72, implying low hydraulic conductivity and non swelling. The Permeability coefficient test also ranged between 3.2×10⁻7cm/s to 8.5×10⁻7 cms-1, within the 10-8 to 10-6 range required for natural leachate attenuation without potential of lateral migration of leachate. However, other geotechnical results such as compaction, CBR, firing and consolidation results met engineering characteristics of soil material. All sites investigated met environmental impact criteria for sanitary landfill except one site. An integration of IKONOS, geology, geophysics and geotechnical data were modelled with designed Environmental geo-spatial model builder in ArcGIS 10.3 environment using Analytic Hierarch Process (AHP)
Keywords: Sanitary Landfill, WLC, MCDA, Satellite Imagery, Southwestern Nigeria
