Thesis (M.Sc.) - Cairo University - Faculty of Agriculture - Department of Agricultural Engineering

A computer model (Emission Uniformity on Sloping Surfaces ("EUSS") has been designed to design and evaluate the emission uniformity (EU) under operating conditions for drip irrigation system on sloping surfaces.The model significantly contributes to obtain the highest value of emission uniformity that offered the crop water requirements and save the irrigation water by reducing head losses which offering the efficient use of different resources including water, energy, and financial resources. EUSS model designed in graphical user interface of the programming language C-sharp (C#) by using Microsoft Visual Studio. EUSS provided the user with the report of the final result of the modeling process (written by Microsoft Reports RDLC).The model was validated in two field locations, the first location at EL-Salhia city, Egypt under uniform surfaces (Slop less than 2 m) where the field emission uniformity (EUF) value was 86.14%, designed emission uniformity (EUD) value was 88.24%, the statistical emission uniformity (EUS) was 90.5 %., while the assumed emission uniformity (E ass.) was 90%.The second location at Al-Azhar park, Cairo was applied on steep slopes (Slope more than 2 m), where the field emission uniformity (EUF) value was 87.8 %, designed emission uniformity (EUD) value was 88.07%, the statistical emission uniformity (EUS) was 87.3 %., while the assumed emission uniformity (EUass.) was 85%.The results did not significantly different according to the recommended values, and the calculated EU{u2019}s values were within the limits of confidence interval (± 3.5%)

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