Hydraulic Performance of Drip Emitters under Different Conditions and Water Qualities

Ali Widaa M. Elamin, Amir Bakheit Saeed, Abbas E. Rahma, Tarig Elgamry

Abstract


The aim of this study was to investigate the hydraulic performance of the drip emitters under different environmental conditions and irrigation water qualities. Two experiments were carried out under different conditions in the demonstration farm of the Faculty of Agriculture, University of Khartoum, during May 2011 to February 2012. The first experiment was achieved under controlled condition (indoor) with different emitter types (Black on-line, Blue on-line and Inline) and levels of water salinity(0.20, 0.35, 3.5, 5.0, and 5.75 ds/m), while the second experiment was conducted under field (outdoor)condition and comprised different emitter types (Blue on-line and Inline) and interspacing (0.5 and 0.3 m). The emitters hydraulic performances were evaluated with reference to percentage of discharge reduction (R%), coefficient of discharge variation (CV%), Christiansen’s uniformity coefficient (CU%), emission uniformity (EU%) and clogging percentage (Pclog%). Analysis of variation showed that there were significant differences (P≤ 0.05) among the measured parameters. The results indicated that the black and blue pressure compensating emitters showed the highest performance in comparison with the inline emitters at P ≤ 0.05, in both experiments. On the other hand, the blue pressure compensating emitters showed the lowest clogging percentage (Pclog%) with regard to the five levels of water salinity 0.20, 0.35, 3.5, 5.0, and 5.75 ds/m, respectively. While in the outdoor experiment the 0.5m emitter inter-spacing showed higher values of discharge (q) uniformity coefficient (CU)% and lower values of reduction of discharge (R)% as compared with 0.3m emitter interspace, and both emitter interspaces showed no significant differences (P ≤ 0.05) in between  for values of emission uniformity (EU)% and Clogging percentage (Pclog). The study concluded that the emitter type, water quality and emitter interspacing are the crucial factors affecting the hydraulic performance of drip irrigation systems.

Keywords


Irrigation system; clogging; emitter;water quality;interspaces

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References


Ahmed, B.A.O., Yamamoto, T., Fujiyama, H., and Miyamoto, K. 2007. Assessment of emitter discharge in micro irrigation system as affected by polluted water. Irrig. Drain Syst. 21: 97-107.

ASAE. 1983. Design, installation and performance of trickle irrigation system .Agricultural Engineers Year Book of Standards. pp., 507510.

Boman, B.J., and Stover, E.W. 2002. Managing salinity in Florida citrus. Gainesville, Fla.: University of Florida, Institute of Food and Agricultural Sciences, Cooperative Extension Service. Available at: http://edis.ifas.ufl.edu/AE171

2 4 6 8 10 12 14 16

2 3 4 5 6 7 8 9 10 11 12

Clogging %

Time in weeks 0.5 m 0.3 m

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Bralts V.F. 1986. Operational principles-field performance and evaluation in: Trickle Irrigation for Crop Production, F.S. Nakayama, D.A. Bucks (eds.), Elsevier Science Publisher, B.V. The Netherlands, pp. 216-223.

Bralts, V.F., and Kesner C.D. 1983. Drip irrigation field uniformity estimation. Transactions of the ASAE 26(5): 1369-1374.

Bucks, D.A., Nakayama, F.S., and Gilbert, R.G. 1979. Trickle irrigation water quality and preventive maintenance. Agricultural Water Management 2(2): 149-162.

Capra, A., and Scicolone, B. 1998. Water quality and distribution uniformity in drip/trickle irrigation systems. J. Agric. Eng. Res. 70: 355-365.

Chartzoulakis, I.L., and Drosos, N. (1995). Water use and yield of greenhouse grown eggplant under drip irrigation. Agric. Water Manage 28:113-120.

Christiansen, J.E. 1942. Irrigation by sprinkler. California Agricultural Experiment Station. Bulletin 670.

Keller, J., and Karmeli D. 1975. Trickle Irrigation Design, Rain Bird Sprinkler Manufacturing Corporation Glendora, California, U.S.A ,pp. 1-5 , 17-18 ,46-49.

Liu, H., and Huang, G. 2009. Laboratory experiment on drip emitter clogging with fresh water and treated sewage effluent. Agricultural Water Management 96: 745−756.

Nakayama, F.S., and Bucks, D.A. 1991. Water quality in drip/trickle irrigation: A review. Irrig. Sci. 12: 187-192.

Powell, N.L.; Wright, F.S., (1998). Subsurface micro-irrigated corn and peanut: effect on soil pH. Agric. Water Manage 36: 169–180.

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Ravina, E.P., Sofer, Z., Marcu, A., Shisha, A., and Sag, G. 1992. Control of emitter clogging in drip irrigation with reclaimed wastewater. Irrigation Science 13(3): 129-139.

Ravina, E.P., Sofer, Z., Marcu, A., Shisha, A., Sagi, G., and Lev, Y. 1997. Control of clogging in drip irrigation with stored treated municipal sewage effluent. Agricultural Water Management 33(2-3): 127137.

Saad, A. F., Hedia, M. R., and Mokhtar, M. A. 2013. Effect of Irrigation Scheduling Using Drainage Water on Moisture and Salinity of Root Zone and Leaf Water Potential of Tomato. Alex. J. Agric. Res. 58 (1): 29‐38. Sahin, U., Anapal, O.,Donmez, M.F., and Sahin, F. 2005. Biological treatment of clogged emitters in a drip irrigation system. J. Environ. Manage. 76: 338–341.

Sharma, P. 2013. Hydraulic Performance of Drip Emitters under Field Condition. IOSR Journal of Agriculture and Veterinary Science 2(1): 15-20.

Singh-Saggu, S., and Kaushal, M.P. 1991. Fresh and saline water irrigation through drip and furrow methods. Int. Tropical. Agric. J. 9:194-202.

Taylor, H.D., Bastos, R.K.X., Pearson, H.W., and Mara, D.D. 1995. Drip irrigation with waste stabilization pond effluents: Solving the problem of emitter fouling. Water Resources 29(4): 1069-1078.

Wei, Z., Tang, Y., Zhao, W., and Lu, B. 2003. Rapid development technique for drip irrigation emitters. Rapid Prototyping Journal 9: 104-110.


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