الفهرس 
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Abstract
The increasing awareness of the accelerating rate of depletion of water resources is resulting in the high level of demand for water-efficient buildings. Currently towards 35% of human water use is unsustainable, drawing on diminishing groundwater and reducing the flows of major rivers: this percentage is likely to increase if climate change worsens especially ”Global Warming”, populations increase, groundwater becomes progressively depleted and supplies become polluted and unsanitary .
The Red Sea region is one of the potential touristic zones facing water shortage in Egypt, although its touristic and economic development strategies are primarily based on water availability. The Red Sea region has no surface water sources, low rainfall seasons on highlands and high-saline coastal ground water aquifers. The sustainable use of water implies resource conservation, environmental friendliness, technological appropriateness, economic viability, and social acceptability of development issues. Innovation includes the adaptation of traditional know-how to the current day challenges, the adaptation of the externally available technologies to the prevailing physical and social conditions .
The design, construction and operation of buildings have a tremendous impact on our environment and our natural resources. Green operation practices reduce resource use and pollution while increasing the value derived from each resource used. The building operation practices are large consumers of water. Many important decisions regarding a water-efficient building can be made during the operation phase. Some of these important decisions are using potable water efficient techniques, depending on waste water treatment methods and utilizing non-potable water applications. Water-efficient practices should be selected based on design and construction requirements, adaptation with climatic conditions and achievement of water-saving, durability and suitable initial costs .
In this thesis, studying different water-efficient techniques which can be used in the Egyptian Red Sea region. First, categorizing all discused techniques based on type of water used (potable or non-potable water). Then, analysis of water consumption in all indoor functional sectors of the selected resort case studies along the Red Sea coast. Finally, concluding a rating categorization for the different water-efficient techniques which can be used during a resort operation. It also defines the related decisions made by architects to choose the suitable water-efficient techniques during design process or after the construction of a resort in the Red Sea region.