DESIGNING TRICKLE IRRIGATION SYSTEM WITH PRESSURE COMPENSATING EMITTERS | ||||
| Menoufia Journal of Agricultural Engineering | ||||
| Article 1, Volume 3, Issue 4, December 2020, Page 13-14 PDF (178.98 K) | ||||
| DOI: 10.21608/maje.2020.138746 | ||||
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| Authors | ||||
| A. H. Eissa; A. H. Goma | ||||
| Prof. of Agricultural Engineering, Fac. of Agric., Menoufia Univ. | ||||
| Abstract | ||||
| The objective of this study was to design the trickle irrigation system by compensating emitters (katif). A field experiment was conducted for 50 m and 75 m of lateral length with outer diameter 16mm and φ13.6mm inner diameter and discharges ( 2, 4 and 8 L /h) and spacing between emitters .5 m. Several points were taken into consideration, such as emitter characteristic friction loss, manufacturing variation, discharge, hydraulic variation. Study compared between lateral at 50m and 75m for friction losses, discharges and lateral length and the primary data of the uniformity parameters (Emission uniformity, Coefficient of uniformity and Coefficient of variation) were calculated and the experiments were done at Collage Farm of Faculty of Agriculture in Menoufia University during 2018. The manufacture coefficient of variation is used as a measure of discharge variation of emitters and manufacturers’ reported discharge rates and coefficients of manufacturing variation (CVm) values were compared with test results for compensating emitters. The effect of compensating emitters ( Katif) and operating pressures (P1 1 and P2 1.5 bar) on the trickle irrigation system hydraulic performance was studied. Compensating emitter (Katif) exponents ranged from 0.06 to 0.2 conducted from curve rate emitter and the measured coefficients of manufacturing variation values for compensating emitters were in the excellent class. As such the variation of discharge through these laterals is restricted by limiting their number to have emission uniformity EU ≥ 90%. | ||||
| Keywords | ||||
| Trickle irrigation; compensating emitter (Katif); laterals; emission uniformity; pressure discharge relationship | ||||
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