DESIGN AND EVALUATION OF TRICKLE IRRIGATION LATERALS WITH SINGLE AND VARING PIPE SIZES | ||||
| Misr Journal of Agricultural Engineering | ||||
| Article 12, Volume 26, Issue 4, October 2009, Page 1836-1854 PDF (241.78 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/mjae.2009.107566 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| A.A. Badr1; A.H. Gomaa2; K.H. Amer3; A.S. Hamza4 | ||||
| 1Professor of Agricultural Engineering Dept ., Cairo University, Egypt. | ||||
| 2Lecturer, Agricultural Engineering Dept., Menoufiya University, Egypt. | ||||
| 3associate professor, Agricultural Engineering Dept., Menoufiya University, Egypt. | ||||
| 4Master researcher, Agricultural Engineering Dept., Menoufiya University, Egypt. | ||||
| Abstract | ||||
| In trickle irrigation system, uniformity of emitter flow rate along lateral depends on lateral length and size, emitter discharge, operating pressure, and manufacturing variation of emitters. The purpose of the study was to evaluate a trickle lateral based on its design criteria to reach minor friction loss and high water uniformity. Three different single trickle laterals as 13, 15, and 17 inner diameters all had 60 m long and 0.5 m spacing was tested under 100, 150, and 200 kPa inlet pressure for 2, 4, and 8 l/h emitter flow rate. A 60 m-lateral with three varying sizes (f17 in 1st, f15 in 2nd, and f13 in 3rd equaled sections) was tested and compared with a 15 mm-single lateral for 8 l/h, both of them were equal in material cost. Friction loss and flow variation were significantly reduced by increasing lateral size and reducing emitter inflow rate. Flow variation as well as uniformity was insignificantly influenced by inlet pressure. Varying sizes-lateral with 150 kPa inlet pressure highly achieved power saving and uniformity compared to single lateral. Abbreviations: f means lateral diameter in mm. | ||||
| Keywords | ||||
| trickle irrigation; friction losses; emitter flow variation; uniformity | ||||
| References | ||||
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Amer, K. H. and A. H. Gomaa (2003). "Uniformity determination in trickle irrigation lateral design". Misr J. Ag. Eng., 20(2): 405-434.
Amer, K. H. and V. Bralts (2005). "Optimal design of trickle irrigation submain unit dimensions". Misr J. Ag. Eng., 22(3): 820-839.
Bralts, V.F., I.P. Wu and H.M. Gitlin (1981). Manufacturing variation and drip irrigation uniformity. Trans. of the ASAE 24(1): 113-119.
Bralts, V.F. and C.D. Kesner (1983). Trickle irrigation field uniformity estimation. . Trans. of the ASAE, 26(5): 1369-1374.
Bralts, V.F. and D.M. Edwards (1986). "Field evaluation of trickle irrigation submain units". Trans. of the ASAE, 29(6): 1659-1664.
Keller, J., and D. Karmeli (1974). Trickle irrigation design parameters. Trans. of the ASAE 17(4): 678-684.
Keller, J., and R.N. Bliesner (1990). Sprinkler and trickle irrigation. Van Nostrand, Reinhold, NY: 600p.
Pitts, D. J.; A. Ferguson and R. E. Wright (1986). "Trickle irrigation lateral design by computer analysis". Trans. Of ASAE, 29(5): 1320-1324.
Watters, G.Z. and J. Keller (1978). "Trickle irrigation tubing hydraulics". ASAE Paper 78-2015.
Wu, I.P. (1992). Energy gradient line approach for direct hydraulic calculation in drip irrigation system. Irrig. Sci. 13: 21-29.
Wu I.P. and R. Yue (1993). Drip lateral design using energy gradient line approach. Trans. of the ASAE 36(2): 389-394.
Wu I.P. and J. Barragan (2000). Design criteria for microirrigation systems. Trans. of the ASAE. 43(5): 1145-1154. | ||||
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