الفهرس 
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Abstract
Alexandria is one of the major cities on the Mediterranean Sea and Egypt’s second largest metropolitan. Alexandria is the most downstream city on the Nile River, with Egypt being its most downstream country. The Nile River represents the main renewable source of water. Over the past 40 years, Alexandria‘s population has doubled. Therefore Water requirements in Egypt are continuously increasing due to population increase. Also the high population growth rates in Alexandria will exaggerate the problems associated with water sector allocation. This report develops a framework to support decision-makers in water sector for planning major projects in Alexandria till 2037 by identifying the gap between the current situation and the future state & suggesting projects needed to fill this gap then applying two methods of solving MCDM problems to determine the priorities of proposed projects. Firstly, data gathering will be conducted, and then estimating the future demands. There are several mathematical methods in use for estimating future demand; the simplest and most traditional means for estimating future water demand is multiplication of current per-capita water consumption by population growth forecasts. Population growth forecasts are a critical part of estimating future water demand. In this study population forecasting is calculated by arithmetic and geometric methods then the future water demands are calculated, and finally major projects outline is proposed. In many engineering applications the final decision is based on the evaluation of a number of alternatives in terms of a number of criteria. Alternatives analysis can be conducted at many scales, for alternatives analysis to be effective, utilities need to establish explicit and consistent project selection criteria for each sustainability objective. And therefore, two methods of MCDM methods will be applied to identify priorities and importance of projects. The first method is The Weighted Scoring Method (WSM); WSM is a powerful and flexible method of comparing similar items against a standard, prioritized list of requirements or criteria. It provides a level of objectivity in matters where subjectivity can have major negative consequences. It can be used for technology, project and product selection, risk response analysis and solution design. The second method is Analytical Hierarchy Process (AHP). AHP is based on comparative evaluation method; The AHP not only clearly identifies the most important alternative but also the preference for each alternative by each decision maker. Therefore, using AHP to analyze the decision-making process may result in a precise clarification of preference for alternative; AHP is methodology which has many different kinds of applications. The main causes for the popularity of AHP model are the three primary functions it has. They are structuring complexity, measurement and synthesis. Finally Priorities and Importance will be determined by the two methods, Results will be analyzed. First, we focused on the difference of the criteria weight of alternatives between the WS method and AHP .These results were very interesting as they showed that each of the main criteria had a bit different projects ranking, Second, we compared the preference orders of alternatives between the WS method and the AHP, there were not much of differences in the final results of the projects priorities list. The results offered some evidence that AHP was superior to traditional methods in representing human perceptions also The AHP makes the selection process very transparent.