SOLID WASTE DUMPING SITE SUITABILITY ANALYSIS USING GIS AND REMOTE SENSING: THE CASE OF GINNIR TOWN: EAST BALE ZONE OROMIA REGIONAL STATE, SOUTH EASTERN ETHIOPIA

The amount of solid waste generated in developing countries is increasing at alarming rate from year to year due to population growth, economic growth and change in lifestyles of people. This solid waste dumping is a critical problem of most urban areas of the world. Like other town solid waste dumping is also a serious problem in Ginnir town. Because of improper waste management practices and absence of public trucks and containers, people are being forced to dispose their wastes in any open fields. Poor sanitary situation has become a common characteristics of the town. The city has already one solid waste disposal site located in Southern part of the city, it is not been scientifically chosen and no technological applications have been made in selection of the disposal site. This study was also aim to identify suitable landfill for solid waste disposal site in the study area by using GIS, RS and MCDA/AHP methods to address the problem and effectively manage the wastes in the city. In this research, both primary and secondary data were utilized. These include: Landsat 8, Images from USGS, Topography (slop map), soil map of FAO (soil permeability), Structural plan (built up area and road) lithology (Geological map), GIS environment, Remote Sensing, GPS, CSA, internet sources and journals. Software packages like ArcGIS 10.5, ERDAS Imagine and IDRISI Selva 17 were used. The maps were prepared and overlayed as well as suitability analysis were done based on geographic information system (GIS) and multi criteria analysis methods. Based on Weighted Linear Combination (WLC) analysis to select Suitable solid waste disposal sites and leveled as highly suitable, suitable, moderately suitable and unsuitable. The result indicates that from total area 0.386% is highly suitable; 24.50% suitable and 75.12% unsuitable for solid waste dumping. The result also showed that the candidate sites are expected to be friendly to the concerns of the residents and the environment issues of the study area. In general, the selection of highly suitable sites requires further geotechnical and hydro-geological analyses to ensure conformity with stringent standard required for design and construction. 4