الفهرس 
الميزان المائى فى جمهوريه مصر العربيهيوجد فقط 14 صفحة متاحة للعرض العام
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المستخلص
The basic aim of that study is increasing the economical revenue from using the unit of water (1000 m3), by the consumption rationalization, decreasing the Loser, and rededicate irrigation water among the different agricultural uses.
The study consists of the Procedure and Reference framework, Four chapters, the Summary and Conclusion, the Attached, the Reviewer, and an English Summary and Conclusion.
The Procedure and Reference framework contained the importance of the research, the aim of the research, sources of data, the research plan and review of the past studies
The second chapter showed that, the total of current water resources in Egypt reached about 69 billion m3 in year 2005, Nile share by 55.5 billion m3 yearly, with percentage 80.44 % of total Egyptian water resources in the same year, Then Ground water which share by 6.10 billion m3 yearly, with percentage 8.84 % of total Egyptian water resources in year 2005.
The third chapter illustrated that the average of watery scarce indicator for the Nile water had reached about – 3.71 % annually during the period (1990-2005), and illustrated that the volume of physical yield that lost by the water which used to irrigate the most crops in Upper Egypt was greater than another water that used to irrigate the same crops in Lower Egypt, And the volume of physical yield that lost by cropping Sugar Beet was the highest loser among another crops in Upper Egypt, which estimated about 3.82 (tons / 1000m3), Also the value of production that lost where cropping Lentil in amount thousand feddan was the highest loser among another crops in Upper Egypt, which estimated about 1333 (1000L.E. / 1000m3), And the quantity of irrigation water that lost where cropping Peanut in amount thousand feddan was the highest loser among another crops in Upper Egypt, which estimated about 1103 (1000m3 / 1000 feddan), Also the net revenue for the unit of irrigation water that lost where cropping Garlic in Upper Egypt was the highest loser among another crops in this region, which estimated about 0.632 (L.E. / m3), Finally, this partition recommended that the necessity of directing irrigation water resources to reclaim regions in northern Egypt where the irrigation water productivity is greater tan southern Egypt regions.
The fourth chapter illustrated that the fifth scenario which outcome by the liner programming method used in Total Egypt was the optimal cropping pattern, Also the average net revenue for the unit of water (1000 m3) increased by 8.62 % above the existing average net revenue for the unit of water in year 2003., And the shadow price for used water estimated about 0.38 (L.E/ m ).
The fifth chapter illustrated that, the economical efficiency for using irrigation water didn’t exist in production functions, where the water production elasticity factors for rice, long clover, summer maize and wheat estimated about 0.789, 0.688, 0.683 and 0.633 on sequence by using stepwise Multi regression method, since that values less than unity which means there are an immoderateness on used irrigation water.
The Important recommendation the necessity of directing irrigation water resources to reclaim regions in northern Egypt where the irrigation waters productivity is greater than southern Egypt regions.