Rationalizing irrigation water and maximizing water use efficiency became the priority of irrigation planners and users under Egyptian conditions. Therefore, the aim of this study was to evaluate adjusted of self-compensating gated pipe for modified surface irrigation and to evaluate the pepper yield response and water use efficiency under three irrigation system (drip irrigation ,traditional gated pipe and modified gated pipe) and three water treatments (100, 75 and 50% of ETC) in old land conditions of Egypt. Hereby field experiments were carried out at the Experimental Farm of Faculty of Agriculture, Ain Shams University, Kalubia Governorate, which represents alluvial soils, for two successive growing seasons 2006 and 2007. Results revealed that. In laboratory experiments of self-compensating gated pipe out let average discharge from 29 L/min were obtained at pressure range of (2-9 kPa) with coefficients of variation less than 0.9%. Uniform discharge was obtained at modified gated pipe under pressure range of 45-90 cm. Corresponding field data were similar to laboratory data. Regular uniform water flow from gates and regular uniform pressure head from each outlet was obtained along line at modified gated pipe under constant pressure. Regular advance times approximately was obtained in modified gated pipe along furrows (0

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Egypt has the majority of productivity of date palm fruit all over the world due to its nutritional, economic, and social importance to the Egyptians. Therefore, study aimed to apply new technique such as simulation models for improving distribution uniformity and the water application efficiency under different surface irrigation system techniques to raise in order to select the proper decisions of integrated water management. Field experiments had been carried out for two successive growing seasons of (2018-2019and 2019-2020) on date palm (Phoenix dactylifera) at the Experimental Farm in El-Dakhla distinct, New Valley Governorate, Egypt. Modified surface irrigation with gated pips was used with three irrigation water distribution techniques :( Two-side furrows, basin and one side furrow with loop). Results revealed that the statistical indicators of R 2 (> 0.9), RMSE (nearest to 0) and E (> 0.9) between measured and simulated advance time and recession time. However, data analysis indicated high satisfactory to use the software under the Egyptian conditions for furrow irrigation. In addition, data revealed that the highest values of yield, water use efficiency and distribution uniformity were (12288kg/fed, 2.1 kg/m 3 and 90%) for one side furrow with loop treatment comparing with two side furrow and basin (5440 kg/fed, 1.6 kg/m 3 and 87%) and (5760 kg/fed, 0.8 kg/m 3 and 68%).

Irrigation, water management under climate change conditions plays an important role in rationalizing water uses efficiency in the agricultural development processes specially under aridecosystems conditions. Therefore, the objective of this study was to estimate the irrigation water requirement of savings landscaping areas under different recent techniques. So, this study focused on comparison between fully automatic with central control system (C.C.S) based on weather station and Control unit based on operator experience and background. The experiments were conducted during two years (from January 2014 to December 2015), in the site that located in District 5, New Cairo, Cairo, Egypt. The results indicated the irrigation scheduling based on weather station data using a central control system (C.C.S) optimized maximize the irrigation water use efficiency and increase the amount of irrigation water saving by about 14%, 36%,18% and 33% in Autumn, Winter ,spring and summer respectively in year of (2014) and 7%, 29.7%, 16%, 33% in Autumn, Winter, spring and summer, respectively in year of (2015) compared with the other irrigation scheduling when based on calculated according to traditional method. In addition, the results revealed that scheduling practices based on weather station data by using central control system could reduce the average of power consumption (about 314 KW) in year of (2014) and (about 347 KW) in year of (2015). Moreover ,the results revealed that the cost of water consumption for the central control system based on the data of the meteorological station for the two years 2014 and 2015