EVALUATION OF CENTER PIVOT IRRIGATION SYSTEMS UNDER EGYPTIAN CONDITIONS | ||||
| Egyptian Journal of Agricultural Research | ||||
| Article 29, Volume 76, Issue 1, March 1998, Page 359-374 PDF (3.13 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejar.1998.346341 | ||||
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| Authors | ||||
| GAMAL H. EL-SAYED; WAEL M. M. SULTAN | ||||
| Agricultural Engineering Research Institute, Agricultural Research Center, Giza, Egypt | ||||
| Abstract | ||||
| Four center pivot systems naming CPS1, CPS2, CPS3 and CPS4 were evaluated for improving water distribution uniformity during year (95/96). The selected systems covered areas ranged from 2 fed to 150 fed. Water distribution uniformity DU, coefficients of uniformity of Critiansen CUE, Wilcox and Swailes CUw, Benani and Hore CU B, coefficient of variance CV and both of the application effeciency AE and system efficiency SE were studied. It was found that average value of uniformity coefficient CUa of CUE and CUB can be considered as a suitable parameter to evaluate CP system under Egyptian conditions, in addition of coefficient of variation CV. Results indicated that the change of distribution uniformity Du ranged from 3% to 13% was due to operating the tested systems for two seasons. The change in the average uniformity coefficient CUa ranged from 0.7% to 8.9% resulting in the system efficiency changed from 8% to 13% depending on the amount of water applied (under 100% of setting speed). System maintenance specially after each season is essential to maintain high efficiency of the CP systems. Paper presented the most constrains which limited the expansion of CP system in Egypt. | ||||
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