الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Alexandria is recognized among the leading rapidly developing cities in Egypt due to its location that is considered strategic. Alexandria is growing into vast areas accompanied with the increasing number of businesses especially industrial facilities as well as service sectors for example hotels, restaurants, small and micro enterprises. Waste produced increases and becomes more complicated as it develops. It is foreseeable that the management of waste issues grows with rapid urban growth having a consequence of increased load on sanitary related issues in the city. Managing the hazard wastes is an essential issue that threats the human being, living organisms and the ecosystem. Disposal of these wastes is considered a key step that finalizes the plan for an effective waste management. Alexandria has EL-Nasrya’s hazardous waste landfill, which is the first unique centre for hazardous waste in Egypt which is serving almost all the governorates of Egypt it’s not only for disposal but also a treatment centre. With the increases in industrial projects and the start of urban sprawl around the region of the landfill, an alternative that complies with international regulations and guidelines must be found. Among several approaches used for the efficient dumping of hazardous waste, landfilling has appeared to be the most conventional method for disposal due to its relatively low cost compared to other methods. However, environmental, social and technical aspects have to be taken under consideration in the process of choosing an appropriate location of the landfill. Therefore, in this study, geographical information systems (GIS) accompanied by analytical hierarchy process (AHP) were utilized to choose the best location for locating a suitable hazard waste landfill in Alexandria city, Egypt. GIS technology associates three-dimensional data with qualitative, quantitative and descriptive databases. It supports a widespread variety of three-dimensional analyses. In the decision-making process, an enormous number of issues shall be measured. GIS is perfect for such studies as it allows easy management of large quantities of three-dimensional data from several sources. The AHP is a technique that, combined into GIS, permits a reliable estimate, based on the parameters that contribute to the analysis of problem. The presented approach begins with the identification of evaluation criteria or parameters needed for landfill allocation in this study seven criteria were taken into consideration. They are surface water (lakes and canals), underground water, urban land, agriculture land use, and distance from roads, railways, and barren land. After selecting the significant criteria that are connected to the current study, the necessary data were obtained to make the digitized criteria map layers. Then Buffer zones, or spatial constraints, were applied on certain criteria according to the regulation and the international guidelines. Then a grade value for sub criteria was prepared in this study and determined using linear standardization in a score range from 0 to 3, where 3 is the highest ,1 is the lowest suitability whereas the buffer zone and excluded areas received the score zero. The relative weights of the criteria were determined by the AHP method and calculated with a pair of wise comparison matrixes. Finally, by multiplying the rank of each criterion with the relative weight produced from the AHP, the suitability index is calculated using the linear weight combination (WLC method). Taking the weights into consideration, it can be concluded that the hydrological criteria which refers to the distance from the surface water and the depth of ground water is the most significant criteria, with total value weight 0.67. On the other hand, the distance from the road network, have a minimum weight of 0.05 because they do not significantly affect the environment, but since they determine the cost of construction, they are taken into account. Agriculture land, urban land and barren land took 0.12, 0.13 and 0.03 respectively. As a final step, the suitability index was reclassified in two main classes, not suitable region for landfill siting which is 73% of the area and suitable region, which is 27% of the total region. Before a final decision is reached, it is necessary to deeply investigate the possible sites and analyze additional factors and constraints.