الفهرس 
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Abstract
This study aims at improving the border and furrow surface irrigation performance through developing simulation models. To meet this objective, work was divided into two stages. The first was devoted to generate data and coefficients required. The second was specified to develop a computer program includes models associated with the designing limitation factors for border and furrow irrigation systems. In the surface irrigation systems (Border and Furrow) were examined through four field experiments. These experiments were carried out during the winter and summer seasons of 2000 and 2001 at ElKarada Water Requirements Research Station, Kafr ElSheikh Governorate. The stripstrip plot design with three replicates was implemented. Furrow irrigation system was tested with the maize crop in the summer seasons. Border irrigation system was evaluated with the wheat crop in the winter seasons. Six soil land preparation treatments were examined. Two ground slopes were tested versus the traditional land leveling. Two levels of stream size were also evaluated. Two distances of run length cutoff were carried out. Model application In the second stage, a computer program was developed and named Surface Irrigation Improvement Computer Aided Design (SIICAD). This program aims at improving surface irrigation systems (border and furrow) via quantifying the design limitation factors. The border system design limitations are the maximum and minimum inflow rates, flow depths and strip length and/or slope. The furrow system design limitations are gross water application, average opportunity time, average intake depth, surface runoff and deep percolation. The program predictions may be used to simulate improvement surface irrigation systems to decrease water loss and increase the surface irrigation efficiency.