UNIFORMITY EVALUATION OF DIFFERENT DRIPPERS USED IN YEMEN | ||||
| Misr Journal of Agricultural Engineering | ||||
| Article 8, Volume 30, Issue 1, January 2013, Page 159-170 PDF (747.59 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/mjae.2013.102132 | ||||
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| Author | ||||
| Samir Abdallah El-Mashriki | ||||
| Assoc. Prof. - Agr. Eng. Dep. – Fac. Of Agr. – Sana'a U., Yemen. | ||||
| Abstract | ||||
| This research was done to study some hydraulic properties of dripper discharge, uniformity and manufacture variation, for five kinds of drippers used in Yemen. A drip irrigation network was constructed in the Faculty of Agriculture - Sana'a University during the period from 2/10 until 25/11/2010. This network included three different lengths for lateral lines ( 20, 30, 50 meter) with five kinds of drippers (drippers with pressure valve and drippers without pressure valve) to study the affect of lateral line length and dripper kind on discharge, and dripper uniformity under three working pressures ( 50, 65, 75 kPa ) . The results of this study are as follow: Dripper discharge was increased with pressure increase and the discharge decreased with drippers line lengths. Italian dripper without pressure valve "Turbo" achieved maximum discharge of 3.800 liter/hour. Jordanian dripper with pressure valve "Nein" achieved minimum discharge of 3.075 liter/hour. Manufacturer factor CV decreased with pressure increase for all drippers. The dripper without pressure valve achieved minimum difference in manufacturer factor. Italian dripper with pressure valve "Turbo" recorded maximum CV with average 0.014, and Italian dripper without pressure valve "Turbo" recorded minimum CV with average 0.012. The Jordanian dripper with pressure valve "Nein" recorded maximum CV with average 0.020, and Jordanian dripper without pressure valve "Nein" recorded minimum CV with average 0.013 and all of them were good. Italian dripper without pressure valve "Turbo" had maximum uniformity of 96.408%, but the Jordanian drippers with pressure valve "Nein" had minimum uniformity of 92.957%, and line length of 20 meter had maximum uniformity. Pressure was 75 kPa. | ||||
| References | ||||
|
Arnaout M.A.I (1993). Hydraulic study on emitter discharge in respect to sensitivity to pressure and temperature. Misr. J. Ag. Eng., 10(3): 545-554.
Arnaout M.A.I (1997). A Study on selecting the proper applied water under different irrigation systems. Misr. J. Ag. Eng., 14(3): 310-318.
ASAE standard, (1996). American Society of Agricultural Engineers, ASAE EP405.1 DEC95 Standard 1996,: 756-797.
Awady M.N. , M.S. Zaki and G.W. Amerham (1975). Trickle – irrigation trial on pea , Ann. Ag. Sc. , Moshtohor ; vol.4 :235-244.
Babel M.S., M. S. Acharya , G. Barua and BN. Rajkhawa (1990). Hydraulics of microtubings for drip irrigation. Proc. 11th I. Cong. Use of Plastics in Ag. , New Delhi, India. 26 February – 2nd March 1990. 89-97.
Berry A.M. (1990). Study on the performance of bi-wall irrigation tubes. Misr J. Ag. Eng. : 9 (a): 25-39.
Bralts V.F. and I.P. Wu (1979). Emitter flow variation and uniformity for drip irrigation. Summer mtg. of ASAE and CSAE U. Manitoba, Winnipeg. Canada, June 24-27, 1979.
Correia J.F. (1990). Evaluation of hydraulic characteristics of emitters, Proc. 11th I. Cong. Use of Plastics in Ag. New Delhi, India, 26 February-2nd March 1990, 137-143.
Ismail S.M. (1992). Characterizing micro – irrigation emission devices performance. Misr J.Ag.Eng;9(3):325-334.
Keller J. and D. Karmeli (1974). Trickle irrigation design parameters. Trans. ASAE 17 (4): 678-684.
Ken S. (1979). Manufacturing variation of trickle emitters. ASAE paper No. 77-2009.
Morad M.M. and M.A. Arnaout (1992). A study on some hydraulic characteristics of trickle irrigation lateral lines. Misr J. Ag. Eng. 9 (1): 23-31.
Nakayama F. S., D. A. Bucks and A.J. Clemmens (1979). Assessing trickle emitter application uniformity. ASAE paper No. 78 – 2017.
Ozekici B. and R. E. Sneed (1995). Manufacturing variation for various trickle irrigation on-line emitter. ASAE, 11(2): 235-240.
Pitts, D.J., J.A. Ferguson and R. E. Wright (1986). Trickle irrigation lateral line design. Transaction of ASAE, 29 (5):1320-1324.
Singh K. K., Rao Y. P. and Kumar S. (1990). Comparative performance of plastic drip irrigation system. Proc. 11th I. Cong. Use of Plastic in Ag., New Delhi India, 26 Feb. 2nd March 1990, 119-124. | ||||
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