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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/3465

Title: GIS AND REMOTE SENSING BASED SOLID WASTE LANDFILL SITE SELECTION: A CASE OF ADDIS ABABA CITY, ETHIOPIA
Authors: GIZACHEW, KABITE
Advisors: K. V. SURYABHAGAVAN(Dr.)
Mekuria Argaw(Dr.)
Keywords: Addis Ababa Solid Waste Management
Landfill,
Multi-Criteria Evaluation,
GIS,
Copyright: Jan-2011
Date Added: 24-Jul-2012
Publisher: Addis Ababa University
Abstract: Solid waste management system is the most difficult task that many countries, both developing and developed, are facing. Landfill method is one of the easy and cheap management systems which are always needed for sustainable management of solid waste. However, if not sited and managed properly, it will result in environmental pollution and public health problems. The open dumping system that the city of Addis Ababa has been using is not environmentally sound and socially acceptable as its location is in inappropriate site. Therefore, it is necessary to select new landfill site for the city that is environmentally sound, socially acceptable and economically feasible. The present study was conducted by integrating Geographic Information System and remote sensing for selecting suitable landfill sites. Factors such as geology, slope, depth to ground water table, permeability, land use/ land cover, proximity from roads, faults, airport, groundwater well and streams/rivers were used for selecting suitable landfill within the study area. GIS-based Multi-Criteria Evaluation methodology was followed to have advantages of both GIS and Multi-Criteria Evaluation method and solve spatial decision making problems. All the factor maps were reclassified and standardized in GIS environment followed by preparation of their suitability map. Analytical Hierarchy Processes pair-wise comparison module was used to derive internal and external weights for all factor parameters and factors respectively. More weight was given to groundwater related criteria so as to protect groundwater pollution from landfill negative effects. Weighted Linear Combination was also used to integrate the factor maps and produce overall landfill suitability map. Accordingly, 40.5km2(7.7%), 68.7km2(13%), 0.7km2(0.01%) and 417.8km2(79.3%) of the total study area is highly, moderately, marginally and unsuitable for landfill respectively. Among the highly suitable landfill sites, those with area greater than 0.5km2 were also evaluated against other criteria like area, distance from the center of the city and distance from nearby settlements so as to choose the most suitable landfill sites. Analytical Hierarchy Processes was applied again to compare and derive weight for the 12 candidate sites in relation to those evaluating criteria. Landfill site 2 which is located in the north eastern part of the city in Yeka sub-city, north of road to Dessie is chosen as the most suitable site, because of the larger area and optimum distance from the nearby settlements and from the center besides their fulfillments of the environmental and socioeconomic factors set before. Landfill site 11 (located in the south eastern part in Bole sub-city) and landfill site 1(found in the northern part of the city in Yeka sub-city) is the second and third most suitable sites respectively due to their larger area and/or distance from nearby settlements and center than the rest of the sites. Landfill 11 is more suitable than landfill 1 due to its safe location from nearby settlements. Therefore, landfill sites 2, 11 and 1 are ranked from 1 to 3 based on their area and distance from the center and nearby settlements compared to the other sites hence their negative effects on the environment and public heath will be minimum.
Description: A THESIS SUBMITTED TO THE SCHOOL OF GRADUATE STUDIES OF ADDIS ABABA UNIVERSITY, IN PARTIAL FULFILMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTERS OF SCIENCE IN REMOTE SENSING AND GEOGRAPHIC INFORMATION SYSTEM
URI: http://hdl.handle.net/123456789/3465
Appears in:Thesis - Earth Sciences

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