الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Global warming and climatic changes have become an important area of investigation in the natural sciences and engineering. Climatic changes have many effects, particularly, in irrigation engineering practice. Global warming phenomenon causes atmospheric temperature to rise. This leads to many effects such as; the sea level rise, reduction of crop productivity, the decrease in rainfall, and particularly the increase of evapotranspiration rates which in turn increases crop water requirements CWR. In the last decade, global vegetation models outcomes show that irrigation requirements are likely to increase in the most irrigated areas in the north of the Mediterranean basin. Recently, the climate in Egypt has been changed with global change. An increase in climate change is expected due to the global warming phenomenon in the future. The present study focuses on predicting the increase of the atmospheric temperature by the year of 2050, and its effect on the corresponding CWR in various areas in Egypt. This will help to estimate the intensive impact of the climate change on CWR in Egypt. A comprehensive data of climatic conditions were collected about the climate of Egypt for the last 50 years (from 1960 to 2010) such as; maximum and minimum temperature degrees, relative humidity, wind speed and the actual duration of sunshine (actual daylight hours). Different Cities were chosen for this study, they are Cairo, Alexandria, Ismailia, Assiut, Aswan, El–Arish , and El-Salloum. Based on the collected data, a decomposition time series model was used to forecast temperature, relative humidity, and wind speed up to year 2050. Accordingly, the reference Evapo-Transpiration rate (ETo) was calculated using Penman – Monteith equation. It was generally noticed that temperature degree and relative humidity in Egypt will increase by time due to global warming phenomenon. Based upon the present study, an increase in ETo ranges from 2.40 % to 14.82 %, this will lead to extra water volume of 6.20 billion m3 will be needed to face the global warming by year 2050, assuming the cultivated area is 16.00 Million Fadden.