Abstract
Several parameters that measure the irrigation performance were analyzed for their relation to surface-irrigation design variables and yield. Application efficiency (AE), requirement efficiency (RE), uniformity coefficient (UC), deficit efficiency distribution (DED) and requirement distribution efficiency (RDE) were examined with respect to surface irrigation design variables (inflow discharge, length of the run, and time of irrigation cutoff). RE, RDE and UC were correlated with relative yield. Surface-irrigation models were used to simulate furrow and border irrigation and to determine the value of the performance irrigation parameters. A linear crop-water-production function was used to estimate yield. The RE and RDE were very well correlated with the design variables in border and furrow irrigation, and they were the parameters best correlated with the relative yield. The UC was not correlated with the design variables and gave a poor correlation with the relative yield. The AE was well correlated with the design variables.
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