Suitable landfill site selection using GIS and RS for solid waste disposal in case of Shambu town, Horro Guduru Wollega zone, Western Oromia, Ethiopia

Abstract

The selection of a suitable landfill site is considered as a complicated task because the whole process is based on many factors and restrictions. The management of collection and disposal site of solid waste existing in shambu town is done through open dumping of waste and the poor quality of the collection process which does not conform to the scientific and environmental criteria applied in the selection of landfill sites. So this study aims to presents landfill suitable site selection for solid waste disposal by using geographic information system and remote sensing with multi-criteria decision analysis. Geographical information system has a large capacity for managing input data and easy to analysis suitability of landfill site. Geographical information system combinations with the Analytical hierarchy process and Multi-Criteria Decision Analysis method were used to derive the relative weighting overlay for each criterion using pairwise comparison. For this study, 5(five) dominant factors were adopted (Geology, soil types, land use land cover, slope and roads) to minimize the negative impacts of landfills in order to find appropriate site for solid waste dumping. Based up on these factors the results have shown that four sites were suggested as highly suitable for solid waste disposal. These sites were site1, site2, site3 and site4 which were found in North, North West, East and South part of 01 and 02 kebele of shambu town. Those sites were easy to access and manage for disposal of solid wastes